No OneTemporary
Actions

Authored By

Unknown

Size

410 KB

Referenced Files

None

Subscribers

None

View Options

This file is larger than 256 KB, so syntax highlighting was skipped.

	diff --git a/plugins/calendar/calendar.php b/plugins/calendar/calendar.php
	index 0d976101..c062ee45 100644
	--- a/plugins/calendar/calendar.php
	+++ b/plugins/calendar/calendar.php
	@@ -1,3297 +1,3297 @@
	<?php

	/**
	* Calendar plugin for Roundcube webmail
	*
	* @author Lazlo Westerhof <hello@lazlo.me>
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* Copyright (C) 2010, Lazlo Westerhof <hello@lazlo.me>
	* Copyright (C) 2014-2015, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	class calendar extends rcube_plugin
	{
	const FREEBUSY_UNKNOWN = 0;
	const FREEBUSY_FREE = 1;
	const FREEBUSY_BUSY = 2;
	const FREEBUSY_TENTATIVE = 3;
	const FREEBUSY_OOF = 4;

	const SESSION_KEY = 'calendar_temp';

	public $task = '?(?!logout).*';
	public $rc;
	public $lib;
	public $resources_dir;
	public $home; // declare public to be used in other classes
	public $urlbase;
	public $timezone;
	public $timezone_offset;
	public $gmt_offset;
	public $ui;

	public $defaults = array(
	'calendar_default_view' => "agendaWeek",
	'calendar_timeslots' => 2,
	'calendar_work_start' => 6,
	'calendar_work_end' => 18,
	'calendar_agenda_range' => 60,
	'calendar_agenda_sections' => 'smart',
	'calendar_event_coloring' => 0,
	'calendar_time_indicator' => true,
	'calendar_allow_invite_shared' => false,
	'calendar_itip_send_option' => 3,
	'calendar_itip_after_action' => 0,
	);

	private $ical;
	private $itip;
	private $driver;


	/**
	* Plugin initialization.
	*/
	function init()
	{
	$this->require_plugin('libcalendaring');

	$this->rc = rcube::get_instance();
	$this->lib = libcalendaring::get_instance();

	$this->register_task('calendar', 'calendar');

	// load calendar configuration
	$this->load_config();

	// load localizations
	$this->add_texts('localization/', $this->rc->task == 'calendar' && (!$this->rc->action \|\| $this->rc->action == 'print'));

	$this->timezone = $this->lib->timezone;
	$this->gmt_offset = $this->lib->gmt_offset;
	$this->dst_active = $this->lib->dst_active;
	$this->timezone_offset = $this->gmt_offset / 3600 - $this->dst_active;

	require($this->home . '/lib/calendar_ui.php');
	$this->ui = new calendar_ui($this);

	// catch iTIP confirmation requests that don're require a valid session
	if ($this->rc->action == 'attend' && !empty($_REQUEST['_t'])) {
	$this->add_hook('startup', array($this, 'itip_attend_response'));
	}
	else if ($this->rc->action == 'feed' && !empty($_REQUEST['_cal'])) {
	$this->add_hook('startup', array($this, 'ical_feed_export'));
	}
	else {
	// default startup routine
	$this->add_hook('startup', array($this, 'startup'));
	}

	$this->add_hook('user_delete', array($this, 'user_delete'));
	}

	/**
	* Startup hook
	*/
	public function startup($args)
	{
	// the calendar module can be enabled/disabled by the kolab_auth plugin
	if ($this->rc->config->get('calendar_disabled', false) \|\| !$this->rc->config->get('calendar_enabled', true))
	return;

	// load Calendar user interface
	if (!$this->rc->output->ajax_call && (!$this->rc->output->env['framed'] \|\| $args['action'] == 'preview')) {
	$this->ui->init();

	// settings are required in (almost) every GUI step
	if ($args['action'] != 'attend')
	$this->rc->output->set_env('calendar_settings', $this->load_settings());
	}

	if ($args['task'] == 'calendar' && $args['action'] != 'save-pref') {
	if ($args['action'] != 'upload') {
	$this->load_driver();
	}

	// register calendar actions
	$this->register_action('index', array($this, 'calendar_view'));
	$this->register_action('event', array($this, 'event_action'));
	$this->register_action('calendar', array($this, 'calendar_action'));
	$this->register_action('count', array($this, 'count_events'));
	$this->register_action('load_events', array($this, 'load_events'));
	$this->register_action('export_events', array($this, 'export_events'));
	$this->register_action('import_events', array($this, 'import_events'));
	$this->register_action('upload', array($this, 'attachment_upload'));
	$this->register_action('get-attachment', array($this, 'attachment_get'));
	$this->register_action('freebusy-status', array($this, 'freebusy_status'));
	$this->register_action('freebusy-times', array($this, 'freebusy_times'));
	$this->register_action('randomdata', array($this, 'generate_randomdata'));
	$this->register_action('print', array($this,'print_view'));
	$this->register_action('mailimportitip', array($this, 'mail_import_itip'));
	$this->register_action('mailimportattach', array($this, 'mail_import_attachment'));
	$this->register_action('mailtoevent', array($this, 'mail_message2event'));
	$this->register_action('inlineui', array($this, 'get_inline_ui'));
	$this->register_action('check-recent', array($this, 'check_recent'));
	$this->register_action('itip-status', array($this, 'event_itip_status'));
	$this->register_action('itip-remove', array($this, 'event_itip_remove'));
	$this->register_action('itip-decline-reply', array($this, 'mail_itip_decline_reply'));
	$this->register_action('itip-delegate', array($this, 'mail_itip_delegate'));
	$this->register_action('resources-list', array($this, 'resources_list'));
	$this->register_action('resources-owner', array($this, 'resources_owner'));
	$this->register_action('resources-calendar', array($this, 'resources_calendar'));
	$this->register_action('resources-autocomplete', array($this, 'resources_autocomplete'));
	$this->add_hook('refresh', array($this, 'refresh'));

	// remove undo information...
	if ($undo = $_SESSION['calendar_event_undo']) {
	// ...after timeout
	$undo_time = $this->rc->config->get('undo_timeout', 0);
	if ($undo['ts'] < time() - $undo_time) {
	$this->rc->session->remove('calendar_event_undo');
	// @TODO: do EXPUNGE on kolab objects?
	}
	}
	}
	else if ($args['task'] == 'settings') {
	// add hooks for Calendar settings
	$this->add_hook('preferences_sections_list', array($this, 'preferences_sections_list'));
	$this->add_hook('preferences_list', array($this, 'preferences_list'));
	$this->add_hook('preferences_save', array($this, 'preferences_save'));
	}
	else if ($args['task'] == 'mail') {
	// hooks to catch event invitations on incoming mails
	if ($args['action'] == 'show' \|\| $args['action'] == 'preview') {
	$this->add_hook('template_object_messagebody', array($this, 'mail_messagebody_html'));
	}

	// add 'Create event' item to message menu
	if ($this->api->output->type == 'html') {
	$this->api->add_content(html::tag('li', null,
	$this->api->output->button(array(
	'command' => 'calendar-create-from-mail',
	'label' => 'calendar.createfrommail',
	'type' => 'link',
	'classact' => 'icon calendarlink active',
	'class' => 'icon calendarlink',
	'innerclass' => 'icon calendar',
	))),
	'messagemenu');

	$this->api->output->add_label('calendar.createfrommail');
	}

	$this->add_hook('messages_list', array($this, 'mail_messages_list'));
	$this->add_hook('message_compose', array($this, 'mail_message_compose'));
	}
	else if ($args['task'] == 'addressbook') {
	if ($this->rc->config->get('calendar_contact_birthdays')) {
	$this->add_hook('contact_update', array($this, 'contact_update'));
	$this->add_hook('contact_create', array($this, 'contact_update'));
	}
	}

	// add hooks to display alarms
	$this->add_hook('pending_alarms', array($this, 'pending_alarms'));
	$this->add_hook('dismiss_alarms', array($this, 'dismiss_alarms'));
	}

	/**
	* Helper method to load the backend driver according to local config
	*/
	private function load_driver()
	{
	if (is_object($this->driver))
	return;

	$driver_name = $this->rc->config->get('calendar_driver', 'database');
	$driver_class = $driver_name . '_driver';

	require_once($this->home . '/drivers/calendar_driver.php');
	require_once($this->home . '/drivers/' . $driver_name . '/' . $driver_class . '.php');

	$this->driver = new $driver_class($this);

	if ($this->driver->undelete)
	$this->driver->undelete = $this->rc->config->get('undo_timeout', 0) > 0;
	}

	/**
	* Load iTIP functions
	*/
	private function load_itip()
	{
	if (!$this->itip) {
	require_once($this->home . '/lib/calendar_itip.php');
	$this->itip = new calendar_itip($this);

	if ($this->rc->config->get('kolab_invitation_calendars'))
	$this->itip->set_rsvp_actions(array('accepted','tentative','declined','delegated','needs-action'));
	}

	return $this->itip;
	}

	/**
	* Load iCalendar functions
	*/
	public function get_ical()
	{
	if (!$this->ical) {
	$this->ical = libcalendaring::get_ical();
	}

	return $this->ical;
	}

	/**
	* Get properties of the calendar this user has specified as default
	*/
	public function get_default_calendar($sensitivity = null)
	{
	$default_id = $this->rc->config->get('calendar_default_calendar');
	$calendars = $this->driver->list_calendars(calendar_driver::FILTER_PERSONAL \| calendar_driver::FILTER_WRITEABLE);
	$calendar = $calendars[$default_id] ?: null;
	if (!$calendar \|\| $sensitivity) {
	foreach ($calendars as $cal) {
	if ($sensitivity && $cal['subtype'] == $sensitivity) {
	$calendar = $cal;
	break;
	}
	if ($cal['default'] && $cal['editable']) {
	$calendar = $cal;
	}
	if ($cal['editable']) {
	$first = $cal;
	}
	}
	}

	return $calendar ?: $first;
	}


	/**
	* Render the main calendar view from skin template
	*/
	function calendar_view()
	{
	$this->rc->output->set_pagetitle($this->gettext('calendar'));

	// Add CSS stylesheets to the page header
	$this->ui->addCSS();

	// Add JS files to the page header
	$this->ui->addJS();

	$this->ui->init_templates();
	$this->rc->output->add_label('lowest','low','normal','high','highest','delete','cancel','uploading','noemailwarning','close');
	$this->rc->output->add_label('libcalendaring.itipaccepted','libcalendaring.itiptentative','libcalendaring.itipdeclined','libcalendaring.itipdelegated','libcalendaring.expandattendeegroup','libcalendaring.expandattendeegroupnodata');

	// initialize attendees autocompletion
	rcube_autocomplete_init();

	$this->rc->output->set_env('timezone', $this->timezone->getName());
	$this->rc->output->set_env('calendar_driver', $this->rc->config->get('calendar_driver'), false);
	$this->rc->output->set_env('calendar_resources', (bool)$this->rc->config->get('calendar_resources_driver'));
	$this->rc->output->set_env('mscolors', jqueryui::get_color_values());
	$this->rc->output->set_env('identities-selector', $this->ui->identity_select(array('id' => 'edit-identities-list', 'aria-label' => $this->gettext('roleorganizer'))));

	$view = rcube_utils::get_input_value('view', rcube_utils::INPUT_GPC);
	if (in_array($view, array('agendaWeek', 'agendaDay', 'month', 'table')))
	$this->rc->output->set_env('view', $view);

	if ($date = rcube_utils::get_input_value('date', rcube_utils::INPUT_GPC))
	$this->rc->output->set_env('date', $date);

	if ($msgref = rcube_utils::get_input_value('itip', rcube_utils::INPUT_GPC))
	$this->rc->output->set_env('itip_events', $this->itip_events($msgref));

	$this->rc->output->send("calendar.calendar");
	}

	/**
	* Handler for preferences_sections_list hook.
	* Adds Calendar settings sections into preferences sections list.
	*
	* @param array Original parameters
	* @return array Modified parameters
	*/
	function preferences_sections_list($p)
	{
	$p['list']['calendar'] = array(
	'id' => 'calendar', 'section' => $this->gettext('calendar'),
	);

	return $p;
	}

	/**
	* Handler for preferences_list hook.
	* Adds options blocks into Calendar settings sections in Preferences.
	*
	* @param array Original parameters
	* @return array Modified parameters
	*/
	function preferences_list($p)
	{
	if ($p['section'] != 'calendar') {
	return $p;
	}

	$no_override = array_flip((array)$this->rc->config->get('dont_override'));

	$p['blocks']['view']['name'] = $this->gettext('mainoptions');

	if (!isset($no_override['calendar_default_view'])) {
	if (!$p['current']) {
	$p['blocks']['view']['content'] = true;
	return $p;
	}

	$field_id = 'rcmfd_default_view';
	$select = new html_select(array('name' => '_default_view', 'id' => $field_id));
	$select->add($this->gettext('day'), "agendaDay");
	$select->add($this->gettext('week'), "agendaWeek");
	$select->add($this->gettext('month'), "month");
	$select->add($this->gettext('agenda'), "table");
	$p['blocks']['view']['options']['default_view'] = array(
	'title' => html::label($field_id, Q($this->gettext('default_view'))),
	'content' => $select->show($this->rc->config->get('calendar_default_view', $this->defaults['calendar_default_view'])),
	);
	}

	if (!isset($no_override['calendar_timeslots'])) {
	if (!$p['current']) {
	$p['blocks']['view']['content'] = true;
	return $p;
	}

	$field_id = 'rcmfd_timeslot';
	$choices = array('1', '2', '3', '4', '6');
	$select = new html_select(array('name' => '_timeslots', 'id' => $field_id));
	$select->add($choices);
	$p['blocks']['view']['options']['timeslots'] = array(
	'title' => html::label($field_id, Q($this->gettext('timeslots'))),
	'content' => $select->show(strval($this->rc->config->get('calendar_timeslots', $this->defaults['calendar_timeslots']))),
	);
	}

	if (!isset($no_override['calendar_first_day'])) {
	if (!$p['current']) {
	$p['blocks']['view']['content'] = true;
	return $p;
	}

	$field_id = 'rcmfd_firstday';
	$select = new html_select(array('name' => '_first_day', 'id' => $field_id));
	- $select->add(rcube_label('sunday'), '0');
	- $select->add(rcube_label('monday'), '1');
	- $select->add(rcube_label('tuesday'), '2');
	- $select->add(rcube_label('wednesday'), '3');
	- $select->add(rcube_label('thursday'), '4');
	- $select->add(rcube_label('friday'), '5');
	- $select->add(rcube_label('saturday'), '6');
	+ $select->add($this->gettext('sunday'), '0');
	+ $select->add($this->gettext('monday'), '1');
	+ $select->add($this->gettext('tuesday'), '2');
	+ $select->add($this->gettext('wednesday'), '3');
	+ $select->add($this->gettext('thursday'), '4');
	+ $select->add($this->gettext('friday'), '5');
	+ $select->add($this->gettext('saturday'), '6');
	$p['blocks']['view']['options']['first_day'] = array(
	'title' => html::label($field_id, Q($this->gettext('first_day'))),
	'content' => $select->show(strval($this->rc->config->get('calendar_first_day', $this->defaults['calendar_first_day']))),
	);
	}

	if (!isset($no_override['calendar_first_hour'])) {
	if (!$p['current']) {
	$p['blocks']['view']['content'] = true;
	return $p;
	}

	$time_format = $this->rc->config->get('time_format', libcalendaring::to_php_date_format($this->rc->config->get('calendar_time_format', $this->defaults['calendar_time_format'])));
	$select_hours = new html_select();
	for ($h = 0; $h < 24; $h++)
	$select_hours->add(date($time_format, mktime($h, 0, 0)), $h);

	$field_id = 'rcmfd_firsthour';
	$p['blocks']['view']['options']['first_hour'] = array(
	'title' => html::label($field_id, Q($this->gettext('first_hour'))),
	'content' => $select_hours->show($this->rc->config->get('calendar_first_hour', $this->defaults['calendar_first_hour']), array('name' => '_first_hour', 'id' => $field_id)),
	);
	}

	if (!isset($no_override['calendar_work_start'])) {
	if (!$p['current']) {
	$p['blocks']['view']['content'] = true;
	return $p;
	}

	$field_id = 'rcmfd_workstart';
	$p['blocks']['view']['options']['workinghours'] = array(
	'title' => html::label($field_id, Q($this->gettext('workinghours'))),
	'content' => $select_hours->show($this->rc->config->get('calendar_work_start', $this->defaults['calendar_work_start']), array('name' => '_work_start', 'id' => $field_id)) .
	' — ' . $select_hours->show($this->rc->config->get('calendar_work_end', $this->defaults['calendar_work_end']), array('name' => '_work_end', 'id' => $field_id)),
	);
	}

	if (!isset($no_override['calendar_event_coloring'])) {
	if (!$p['current']) {
	$p['blocks']['view']['content'] = true;
	return $p;
	}

	$field_id = 'rcmfd_coloring';
	$select_colors = new html_select(array('name' => '_event_coloring', 'id' => $field_id));
	$select_colors->add($this->gettext('coloringmode0'), 0);
	$select_colors->add($this->gettext('coloringmode1'), 1);
	$select_colors->add($this->gettext('coloringmode2'), 2);
	$select_colors->add($this->gettext('coloringmode3'), 3);

	$p['blocks']['view']['options']['eventcolors'] = array(
	'title' => html::label($field_id . 'value', Q($this->gettext('eventcoloring'))),
	'content' => $select_colors->show($this->rc->config->get('calendar_event_coloring', $this->defaults['calendar_event_coloring'])),
	);
	}

	// loading driver is expensive, don't do it if not needed
	$this->load_driver();

	if (!isset($no_override['calendar_default_alarm_type'])) {
	if (!$p['current']) {
	$p['blocks']['view']['content'] = true;
	return $p;
	}

	$field_id = 'rcmfd_alarm';
	$select_type = new html_select(array('name' => '_alarm_type', 'id' => $field_id));
	$select_type->add($this->gettext('none'), '');
	foreach ($this->driver->alarm_types as $type)
	- $select_type->add(rcube_label(strtolower("alarm{$type}option"), 'libcalendaring'), $type);
	+ $select_type->add($this->gettext(strtolower("alarm{$type}option"), 'libcalendaring'), $type);

	$p['blocks']['view']['options']['alarmtype'] = array(
	'title' => html::label($field_id, Q($this->gettext('defaultalarmtype'))),
	'content' => $select_type->show($this->rc->config->get('calendar_default_alarm_type', '')),
	);
	}

	if (!isset($no_override['calendar_default_alarm_offset'])) {
	if (!$p['current']) {
	$p['blocks']['view']['content'] = true;
	return $p;
	}

	$field_id = 'rcmfd_alarm';
	$input_value = new html_inputfield(array('name' => '_alarm_value', 'id' => $field_id . 'value', 'size' => 3));
	$select_offset = new html_select(array('name' => '_alarm_offset', 'id' => $field_id . 'offset'));
	foreach (array('-M','-H','-D','+M','+H','+D') as $trigger)
	- $select_offset->add(rcube_label('trigger' . $trigger, 'libcalendaring'), $trigger);
	+ $select_offset->add($this->gettext('trigger' . $trigger, 'libcalendaring'), $trigger);

	$preset = libcalendaring::parse_alarm_value($this->rc->config->get('calendar_default_alarm_offset', '-15M'));
	$p['blocks']['view']['options']['alarmoffset'] = array(
	'title' => html::label($field_id . 'value', Q($this->gettext('defaultalarmoffset'))),
	'content' => $input_value->show($preset[0]) . ' ' . $select_offset->show($preset[1]),
	);
	}

	if (!isset($no_override['calendar_default_calendar'])) {
	if (!$p['current']) {
	$p['blocks']['view']['content'] = true;
	return $p;
	}
	// default calendar selection
	$field_id = 'rcmfd_default_calendar';
	$select_cal = new html_select(array('name' => '_default_calendar', 'id' => $field_id, 'is_escaped' => true));
	foreach ((array)$this->driver->list_calendars(calendar_driver::FILTER_PERSONAL) as $id => $prop) {
	$select_cal->add($prop['name'], strval($id));
	if ($prop['default'])
	$default_calendar = $id;
	}
	$p['blocks']['view']['options']['defaultcalendar'] = array(
	'title' => html::label($field_id . 'value', Q($this->gettext('defaultcalendar'))),
	'content' => $select_cal->show($this->rc->config->get('calendar_default_calendar', $default_calendar)),
	);
	}

	$p['blocks']['itip']['name'] = $this->gettext('itipoptions');

	// Invitations handling
	if (!isset($no_override['calendar_itip_after_action'])) {
	if (!$p['current']) {
	$p['blocks']['itip']['content'] = true;
	return $p;
	}

	$field_id = 'rcmfd_after_action';
	$select = new html_select(array('name' => '_after_action', 'id' => $field_id,
	'onchange' => "\$('#{$field_id}_select')[this.value == 4 ? 'show' : 'hide']()"));

	$select->add($this->gettext('afternothing'), '');
	$select->add($this->gettext('aftertrash'), 1);
	$select->add($this->gettext('afterdelete'), 2);
	$select->add($this->gettext('afterflagdeleted'), 3);
	$select->add($this->gettext('aftermoveto'), 4);

	$val = $this->rc->config->get('calendar_itip_after_action', $this->defaults['calendar_itip_after_action']);
	if ($val !== null && $val !== '' && !is_int($val)) {
	$folder = $val;
	$val = 4;
	}

	$folders = $this->rc->folder_selector(array(
	'id' => $field_id . '_select',
	'name' => '_after_action_folder',
	'maxlength' => 30,
	'folder_filter' => 'mail',
	'folder_rights' => 'w',
	'style' => $val !== 4 ? 'display:none' : '',
	));

	$p['blocks']['itip']['options']['after_action'] = array(
	'title' => html::label($field_id, Q($this->gettext('afteraction'))),
	'content' => $select->show($val) . $folders->show($folder),
	);
	}

	// category definitions
	if (!$this->driver->nocategories && !isset($no_override['calendar_categories'])) {
	$p['blocks']['categories']['name'] = $this->gettext('categories');

	if (!$p['current']) {
	$p['blocks']['categories']['content'] = true;
	return $p;
	}

	$categories = (array) $this->driver->list_categories();
	$categories_list = '';
	foreach ($categories as $name => $color) {
	$key = md5($name);
	$field_class = 'rcmfd_category_' . str_replace(' ', '_', $name);
	$category_remove = new html_inputfield(array('type' => 'button', 'value' => 'X', 'class' => 'button', 'onclick' => '$(this).parent().remove()', 'title' => $this->gettext('remove_category')));
	$category_name = new html_inputfield(array('name' => "_categories[$key]", 'class' => $field_class, 'size' => 30, 'disabled' => $this->driver->categoriesimmutable));
	$category_color = new html_inputfield(array('name' => "_colors[$key]", 'class' => "$field_class colors", 'size' => 6));
	$hidden = $this->driver->categoriesimmutable ? html::tag('input', array('type' => 'hidden', 'name' => "_categories[$key]", 'value' => $name)) : '';
	$categories_list .= html::div(null, $hidden . $category_name->show($name) . ' ' . $category_color->show($color) . ' ' . $category_remove->show());
	}

	$p['blocks']['categories']['options']['category_' . $name] = array(
	'content' => html::div(array('id' => 'calendarcategories'), $categories_list),
	);

	$field_id = 'rcmfd_new_category';
	$new_category = new html_inputfield(array('name' => '_new_category', 'id' => $field_id, 'size' => 30));
	$add_category = new html_inputfield(array('type' => 'button', 'class' => 'button', 'value' => $this->gettext('add_category'), 'onclick' => "rcube_calendar_add_category()"));
	$p['blocks']['categories']['options']['categories'] = array(
	'content' => $new_category->show('') . ' ' . $add_category->show(),
	);

	$this->rc->output->add_script('function rcube_calendar_add_category(){
	var name = $("#rcmfd_new_category").val();
	if (name.length) {
	var input = $("<input>").attr("type", "text").attr("name", "_categories[]").attr("size", 30).val(name);
	var color = $("<input>").attr("type", "text").attr("name", "_colors[]").attr("size", 6).addClass("colors").val("000000");
	var button = $("<input>").attr("type", "button").attr("value", "X").addClass("button").click(function(){ $(this).parent().remove() });
	$("<div>").append(input).append(" ").append(color).append(" ").append(button).appendTo("#calendarcategories");
	color.miniColors({ colorValues:(rcmail.env.mscolors \|\| []) });
	$("#rcmfd_new_category").val("");
	}
	}');

	$this->rc->output->add_script('$("#rcmfd_new_category").keypress(function(event){
	if (event.which == 13) {
	rcube_calendar_add_category();
	event.preventDefault();
	}
	});
	', 'docready');

	// load miniColors js/css files
	jqueryui::miniColors();
	}

	// virtual birthdays calendar
	if (!isset($no_override['calendar_contact_birthdays'])) {
	$p['blocks']['birthdays']['name'] = $this->gettext('birthdayscalendar');

	if (!$p['current']) {
	$p['blocks']['birthdays']['content'] = true;
	return $p;
	}

	$field_id = 'rcmfd_contact_birthdays';
	$input = new html_checkbox(array('name' => '_contact_birthdays', 'id' => $field_id, 'value' => 1, 'onclick' => '$(".calendar_birthday_props").prop("disabled",!this.checked)'));

	$p['blocks']['birthdays']['options']['contact_birthdays'] = array(
	'title' => html::label($field_id, $this->gettext('displaybirthdayscalendar')),
	'content' => $input->show($this->rc->config->get('calendar_contact_birthdays')?1:0),
	);

	$input_attrib = array(
	'class' => 'calendar_birthday_props',
	'disabled' => !$this->rc->config->get('calendar_contact_birthdays'),
	);

	$sources = array();
	$checkbox = new html_checkbox(array('name' => '_birthday_adressbooks[]') + $input_attrib);
	foreach ($this->rc->get_address_sources(false, true) as $source) {
	$active = in_array($source['id'], (array)$this->rc->config->get('calendar_birthday_adressbooks', array())) ? $source['id'] : '';
	$sources[] = html::label(null, $checkbox->show($active, array('value' => $source['id'])) . ' ' . rcube::Q($source['realname'] ?: $source['name']));
	}

	$p['blocks']['birthdays']['options']['birthday_adressbooks'] = array(
	'title' => rcube::Q($this->gettext('birthdayscalendarsources')),
	'content' => join(html::br(), $sources),
	);

	$field_id = 'rcmfd_birthdays_alarm';
	$select_type = new html_select(array('name' => '_birthdays_alarm_type', 'id' => $field_id) + $input_attrib);
	$select_type->add($this->gettext('none'), '');
	foreach ($this->driver->alarm_types as $type) {
	- $select_type->add(rcube_label(strtolower("alarm{$type}option"), 'libcalendaring'), $type);
	+ $select_type->add($this->gettext(strtolower("alarm{$type}option"), 'libcalendaring'), $type);
	}

	$input_value = new html_inputfield(array('name' => '_birthdays_alarm_value', 'id' => $field_id . 'value', 'size' => 3) + $input_attrib);
	$select_offset = new html_select(array('name' => '_birthdays_alarm_offset', 'id' => $field_id . 'offset') + $input_attrib);
	foreach (array('-M','-H','-D') as $trigger)
	- $select_offset->add(rcube_label('trigger' . $trigger, 'libcalendaring'), $trigger);
	+ $select_offset->add($this->gettext('trigger' . $trigger, 'libcalendaring'), $trigger);

	$preset = libcalendaring::parse_alarm_value($this->rc->config->get('calendar_birthdays_alarm_offset', '-1D'));
	$p['blocks']['birthdays']['options']['birthdays_alarmoffset'] = array(
	'title' => html::label($field_id . 'value', rcube::Q($this->gettext('showalarms'))),
	'content' => $select_type->show($this->rc->config->get('calendar_birthdays_alarm_type', '')) . ' ' . $input_value->show($preset[0]) . ' ' . $select_offset->show($preset[1]),
	);
	}

	return $p;
	}

	/**
	* Handler for preferences_save hook.
	* Executed on Calendar settings form submit.
	*
	* @param array Original parameters
	* @return array Modified parameters
	*/
	function preferences_save($p)
	{
	if ($p['section'] == 'calendar') {
	$this->load_driver();

	// compose default alarm preset value
	$alarm_offset = rcube_utils::get_input_value('_alarm_offset', rcube_utils::INPUT_POST);
	$alarm_value = rcube_utils::get_input_value('_alarm_value', rcube_utils::INPUT_POST);
	$default_alarm = $alarm_offset[0] . intval($alarm_value) . $alarm_offset[1];

	$birthdays_alarm_offset = rcube_utils::get_input_value('_birthdays_alarm_offset', rcube_utils::INPUT_POST);
	$birthdays_alarm_value = rcube_utils::get_input_value('_birthdays_alarm_value', rcube_utils::INPUT_POST);
	$birthdays_alarm_value = $birthdays_alarm_offset[0] . intval($birthdays_alarm_value) . $birthdays_alarm_offset[1];

	$p['prefs'] = array(
	'calendar_default_view' => rcube_utils::get_input_value('_default_view', rcube_utils::INPUT_POST),
	'calendar_timeslots' => intval(rcube_utils::get_input_value('_timeslots', rcube_utils::INPUT_POST)),
	'calendar_first_day' => intval(rcube_utils::get_input_value('_first_day', rcube_utils::INPUT_POST)),
	'calendar_first_hour' => intval(rcube_utils::get_input_value('_first_hour', rcube_utils::INPUT_POST)),
	'calendar_work_start' => intval(rcube_utils::get_input_value('_work_start', rcube_utils::INPUT_POST)),
	'calendar_work_end' => intval(rcube_utils::get_input_value('_work_end', rcube_utils::INPUT_POST)),
	'calendar_event_coloring' => intval(rcube_utils::get_input_value('_event_coloring', rcube_utils::INPUT_POST)),
	'calendar_default_alarm_type' => rcube_utils::get_input_value('_alarm_type', rcube_utils::INPUT_POST),
	'calendar_default_alarm_offset' => $default_alarm,
	'calendar_default_calendar' => rcube_utils::get_input_value('_default_calendar', rcube_utils::INPUT_POST),
	'calendar_date_format' => null, // clear previously saved values
	'calendar_time_format' => null,
	'calendar_contact_birthdays' => rcube_utils::get_input_value('_contact_birthdays', rcube_utils::INPUT_POST) ? true : false,
	'calendar_birthday_adressbooks' => (array) rcube_utils::get_input_value('_birthday_adressbooks', rcube_utils::INPUT_POST),
	'calendar_birthdays_alarm_type' => rcube_utils::get_input_value('_birthdays_alarm_type', rcube_utils::INPUT_POST),
	'calendar_birthdays_alarm_offset' => $birthdays_alarm_value ?: null,
	'calendar_itip_after_action' => intval(rcube_utils::get_input_value('_after_action', rcube_utils::INPUT_POST)),
	);

	if ($p['prefs']['calendar_itip_after_action'] == 4) {
	$p['prefs']['calendar_itip_after_action'] = rcube_utils::get_input_value('_after_action_folder', rcube_utils::INPUT_POST, true);
	}

	// categories
	if (!$this->driver->nocategories) {
	$old_categories = $new_categories = array();
	foreach ($this->driver->list_categories() as $name => $color) {
	$old_categories[md5($name)] = $name;
	}

	$categories = (array) rcube_utils::get_input_value('_categories', rcube_utils::INPUT_POST);
	$colors = (array) rcube_utils::get_input_value('_colors', rcube_utils::INPUT_POST);

	foreach ($categories as $key => $name) {
	$color = preg_replace('/^#/', '', strval($colors[$key]));

	// rename categories in existing events -> driver's job
	if ($oldname = $old_categories[$key]) {
	$this->driver->replace_category($oldname, $name, $color);
	unset($old_categories[$key]);
	}
	else
	$this->driver->add_category($name, $color);

	$new_categories[$name] = $color;
	}

	// these old categories have been removed, alter events accordingly -> driver's job
	foreach ((array)$old_categories[$key] as $key => $name) {
	$this->driver->remove_category($name);
	}

	$p['prefs']['calendar_categories'] = $new_categories;
	}
	}

	return $p;
	}

	/**
	* Dispatcher for calendar actions initiated by the client
	*/
	function calendar_action()
	{
	$action = rcube_utils::get_input_value('action', rcube_utils::INPUT_GPC);
	$cal = rcube_utils::get_input_value('c', rcube_utils::INPUT_GPC);
	$success = $reload = false;

	if (isset($cal['showalarms']))
	$cal['showalarms'] = intval($cal['showalarms']);

	switch ($action) {
	case "form-new":
	case "form-edit":
	echo $this->ui->calendar_editform($action, $cal);
	exit;
	case "new":
	$success = $this->driver->create_calendar($cal);
	$reload = true;
	break;
	case "edit":
	$success = $this->driver->edit_calendar($cal);
	$reload = true;
	break;
	case "delete":
	if ($success = $this->driver->delete_calendar($cal))
	$this->rc->output->command('plugin.destroy_source', array('id' => $cal['id']));
	break;
	case "subscribe":
	if (!$this->driver->subscribe_calendar($cal))
	$this->rc->output->show_message($this->gettext('errorsaving'), 'error');
	return;
	case "search":
	$results = array();
	$color_mode = $this->rc->config->get('calendar_event_coloring', $this->defaults['calendar_event_coloring']);
	$query = rcube_utils::get_input_value('q', rcube_utils::INPUT_GPC);
	$source = rcube_utils::get_input_value('source', rcube_utils::INPUT_GPC);

	foreach ((array) $this->driver->search_calendars($query, $source) as $id => $prop) {
	$editname = $prop['editname'];
	unset($prop['editname']); // force full name to be displayed
	$prop['active'] = false;

	// let the UI generate HTML and CSS representation for this calendar
	$html = $this->ui->calendar_list_item($id, $prop, $jsenv);
	$cal = $jsenv[$id];
	$cal['editname'] = $editname;
	$cal['html'] = $html;
	if (!empty($prop['color']))
	$cal['css'] = $this->ui->calendar_css_classes($id, $prop, $color_mode);

	$results[] = $cal;
	}
	// report more results available
	if ($this->driver->search_more_results)
	$this->rc->output->show_message('autocompletemore', 'info');

	$this->rc->output->command('multi_thread_http_response', $results, rcube_utils::get_input_value('_reqid', rcube_utils::INPUT_GPC));
	return;
	}

	if ($success)
	$this->rc->output->show_message('successfullysaved', 'confirmation');
	else {
	$error_msg = $this->gettext('errorsaving') . ($this->driver->last_error ? ': ' . $this->driver->last_error :'');
	$this->rc->output->show_message($error_msg, 'error');
	}

	$this->rc->output->command('plugin.unlock_saving');

	if ($success && $reload)
	$this->rc->output->command('plugin.reload_view');
	}


	/**
	* Dispatcher for event actions initiated by the client
	*/
	function event_action()
	{
	$action = rcube_utils::get_input_value('action', rcube_utils::INPUT_GPC);
	$event = rcube_utils::get_input_value('e', rcube_utils::INPUT_POST, true);
	$success = $reload = $got_msg = false;

	// force notify if hidden + active
	if ((int)$this->rc->config->get('calendar_itip_send_option', $this->defaults['calendar_itip_send_option']) === 1)
	$event['_notify'] = 1;

	// read old event data in order to find changes
	if (($event['_notify'] \|\| $event['_decline']) && $action != 'new') {
	$old = $this->driver->get_event($event);

	// load main event if savemode is 'all' or if deleting 'future' events
	if (($event['_savemode'] == 'all' \|\| ($event['_savemode'] == 'future' && $action == 'remove' && !$event['_decline'])) && $old['recurrence_id']) {
	$old['id'] = $old['recurrence_id'];
	$old = $this->driver->get_event($old);
	}
	}

	switch ($action) {
	case "new":
	// create UID for new event
	$event['uid'] = $this->generate_uid();
	$this->write_preprocess($event, $action);
	if ($success = $this->driver->new_event($event)) {
	$event['id'] = $event['uid'];
	$event['_savemode'] = 'all';
	$this->cleanup_event($event);
	$this->event_save_success($event, null, $action, true);
	}
	$reload = $success && $event['recurrence'] ? 2 : 1;
	break;

	case "edit":
	$this->write_preprocess($event, $action);
	if ($success = $this->driver->edit_event($event)) {
	$this->cleanup_event($event);
	$this->event_save_success($event, $old, $action, $success);
	}
	$reload = $success && ($event['recurrence'] \|\| $event['_savemode'] \|\| $event['_fromcalendar']) ? 2 : 1;
	break;

	case "resize":
	$this->write_preprocess($event, $action);
	if ($success = $this->driver->resize_event($event)) {
	$this->event_save_success($event, $old, $action, $success);
	}
	$reload = $event['_savemode'] ? 2 : 1;
	break;

	case "move":
	$this->write_preprocess($event, $action);
	if ($success = $this->driver->move_event($event)) {
	$this->event_save_success($event, $old, $action, $success);
	}
	$reload = $success && $event['_savemode'] ? 2 : 1;
	break;

	case "remove":
	// remove previous deletes
	$undo_time = $this->driver->undelete ? $this->rc->config->get('undo_timeout', 0) : 0;
	$this->rc->session->remove('calendar_event_undo');

	// search for event if only UID is given
	if (!isset($event['calendar']) && $event['uid']) {
	if (!($event = $this->driver->get_event($event, calendar_driver::FILTER_WRITEABLE))) {
	break;
	}
	$undo_time = 0;
	}

	$success = $this->driver->remove_event($event, $undo_time < 1);
	$reload = (!$success \|\| $event['_savemode']) ? 2 : 1;

	if ($undo_time > 0 && $success) {
	$_SESSION['calendar_event_undo'] = array('ts' => time(), 'data' => $event);
	// display message with Undo link.
	$msg = html::span(null, $this->gettext('successremoval'))
	. ' ' . html::a(array('onclick' => sprintf("%s.http_request('event', 'action=undo', %s.display_message('', 'loading'))",
	- JS_OBJECT_NAME, JS_OBJECT_NAME)), rcube_label('undo'));
	+ JS_OBJECT_NAME, JS_OBJECT_NAME)), $this->gettext('undo'));
	$this->rc->output->show_message($msg, 'confirmation', null, true, $undo_time);
	$got_msg = true;
	}
	else if ($success) {
	$this->rc->output->show_message('calendar.successremoval', 'confirmation');
	$got_msg = true;
	}

	// send cancellation for the main event
	if ($event['_savemode'] == 'all') {
	unset($old['_instance'], $old['recurrence_date'], $old['recurrence_id']);
	}
	// send an update for the main event's recurrence rule instead of a cancellation message
	else if ($event['_savemode'] == 'future' && $success !== false && $success !== true) {
	$event['_savemode'] = 'all'; // force event_save_success() to load master event
	$action = 'edit';
	$success = true;
	}

	// send iTIP reply that participant has declined the event
	if ($success && $event['_decline']) {
	$emails = $this->get_user_emails();
	foreach ($old['attendees'] as $i => $attendee) {
	if ($attendee['role'] == 'ORGANIZER')
	$organizer = $attendee;
	else if ($attendee['email'] && in_array(strtolower($attendee['email']), $emails)) {
	$old['attendees'][$i]['status'] = 'DECLINED';
	$reply_sender = $attendee['email'];
	}
	}

	if ($event['_savemode'] == 'future' && $event['id'] != $old['id']) {
	$old['thisandfuture'] = true;
	}

	$itip = $this->load_itip();
	$itip->set_sender_email($reply_sender);
	if ($organizer && $itip->send_itip_message($old, 'REPLY', $organizer, 'itipsubjectdeclined', 'itipmailbodydeclined'))
	$this->rc->output->command('display_message', $this->gettext(array('name' => 'sentresponseto', 'vars' => array('mailto' => $organizer['name'] ? $organizer['name'] : $organizer['email']))), 'confirmation');
	else
	$this->rc->output->command('display_message', $this->gettext('itipresponseerror'), 'error');
	}
	else if ($success) {
	$this->event_save_success($event, $old, $action, $success);
	}
	break;

	case "undo":
	// Restore deleted event
	$event = $_SESSION['calendar_event_undo']['data'];

	if ($event)
	$success = $this->driver->restore_event($event);

	if ($success) {
	$this->rc->session->remove('calendar_event_undo');
	$this->rc->output->show_message('calendar.successrestore', 'confirmation');
	$got_msg = true;
	$reload = 2;
	}

	break;

	case "rsvp":
	$itip_sending = $this->rc->config->get('calendar_itip_send_option', $this->defaults['calendar_itip_send_option']);
	$status = rcube_utils::get_input_value('status', rcube_utils::INPUT_POST);
	$attendees = rcube_utils::get_input_value('attendees', rcube_utils::INPUT_POST);
	$reply_comment = $event['comment'];

	$this->write_preprocess($event, 'edit');
	$ev = $this->driver->get_event($event);
	$ev['attendees'] = $event['attendees'];
	$ev['free_busy'] = $event['free_busy'];
	$ev['_savemode'] = $event['_savemode'];

	// send invitation to delegatee + add it as attendee
	if ($status == 'delegated' && $event['to']) {
	$itip = $this->load_itip();
	if ($itip->delegate_to($ev, $event['to'], (bool)$event['rsvp'], $attendees)) {
	$this->rc->output->show_message('calendar.itipsendsuccess', 'confirmation');
	$noreply = false;
	}
	}

	$event = $ev;

	// compose a list of attendees affected by this change
	$updated_attendees = array_filter(array_map(function($j) use ($event) {
	return $event['attendees'][$j];
	}, $attendees));

	if ($success = $this->driver->edit_rsvp($event, $status, $updated_attendees)) {
	$noreply = rcube_utils::get_input_value('noreply', rcube_utils::INPUT_GPC);
	$noreply = intval($noreply) \|\| $status == 'needs-action' \|\| $itip_sending === 0;
	$reload = $event['calendar'] != $ev['calendar'] \|\| $event['recurrence'] ? 2 : 1;
	$organizer = null;
	$emails = $this->get_user_emails();

	foreach ($event['attendees'] as $i => $attendee) {
	if ($attendee['role'] == 'ORGANIZER') {
	$organizer = $attendee;
	}
	else if ($attendee['email'] && in_array(strtolower($attendee['email']), $emails)) {
	$reply_sender = $attendee['email'];
	}
	}

	if (!$noreply) {
	$itip = $this->load_itip();
	$itip->set_sender_email($reply_sender);
	$event['comment'] = $reply_comment;
	$event['thisandfuture'] = $event['_savemode'] == 'future';
	if ($organizer && $itip->send_itip_message($event, 'REPLY', $organizer, 'itipsubject' . $status, 'itipmailbody' . $status))
	$this->rc->output->command('display_message', $this->gettext(array('name' => 'sentresponseto', 'vars' => array('mailto' => $organizer['name'] ? $organizer['name'] : $organizer['email']))), 'confirmation');
	else
	$this->rc->output->command('display_message', $this->gettext('itipresponseerror'), 'error');
	}

	// refresh all calendars
	if ($event['calendar'] != $ev['calendar']) {
	$this->rc->output->command('plugin.refresh_calendar', array('source' => null, 'refetch' => true));
	$reload = 0;
	}
	}
	break;

	case "dismiss":
	$event['ids'] = explode(',', $event['id']);
	$plugin = $this->rc->plugins->exec_hook('dismiss_alarms', $event);
	$success = $plugin['success'];
	foreach ($event['ids'] as $id) {
	if (strpos($id, 'cal:') === 0)
	$success \|= $this->driver->dismiss_alarm(substr($id, 4), $event['snooze']);
	}
	break;

	case "changelog":
	$data = $this->driver->get_event_changelog($event);
	if (is_array($data) && !empty($data)) {
	$lib = $this->lib;
	$dtformat = $this->rc->config->get('date_format') . ' ' . $this->rc->config->get('time_format');
	array_walk($data, function(&$change) use ($lib, $dtformat) {
	if ($change['date']) {
	$dt = $lib->adjust_timezone($change['date']);
	if ($dt instanceof DateTime)
	$change['date'] = $this->rc->format_date($dt, $dtformat, false);
	}
	});
	$this->rc->output->command('plugin.render_event_changelog', $data);
	}
	else {
	$this->rc->output->command('plugin.render_event_changelog', false);
	}
	$got_msg = true;
	$reload = false;
	break;

	case "diff":
	$data = $this->driver->get_event_diff($event, $event['rev1'], $event['rev2']);
	if (is_array($data)) {
	// convert some properties, similar to self::_client_event()
	$lib = $this->lib;
	array_walk($data['changes'], function(&$change, $i) use ($event, $lib) {
	// convert date cols
	foreach (array('start','end','created','changed') as $col) {
	if ($change['property'] == $col) {
	$change['old'] = $lib->adjust_timezone($change['old'], strlen($change['old']) == 10)->format('c');
	$change['new'] = $lib->adjust_timezone($change['new'], strlen($change['new']) == 10)->format('c');
	}
	}
	// create textual representation for alarms and recurrence
	if ($change['property'] == 'alarms') {
	if (is_array($change['old']))
	$change['old_'] = libcalendaring::alarm_text($change['old']);
	if (is_array($change['new']))
	$change['new_'] = libcalendaring::alarm_text(array_merge((array)$change['old'], $change['new']));
	}
	if ($change['property'] == 'recurrence') {
	if (is_array($change['old']))
	$change['old_'] = $lib->recurrence_text($change['old']);
	if (is_array($change['new']))
	$change['new_'] = $lib->recurrence_text(array_merge((array)$change['old'], $change['new']));
	}
	if ($change['property'] == 'attachments') {
	if (is_array($change['old']))
	$change['old']['classname'] = rcube_utils::file2class($change['old']['mimetype'], $change['old']['name']);
	if (is_array($change['new']))
	$change['new']['classname'] = rcube_utils::file2class($change['new']['mimetype'], $change['new']['name']);
	}
	// compute a nice diff of description texts
	if ($change['property'] == 'description') {
	$change['diff_'] = libkolab::html_diff($change['old'], $change['new']);
	}
	});
	$this->rc->output->command('plugin.event_show_diff', $data);
	}
	else {
	$this->rc->output->command('display_message', $this->gettext('objectdiffnotavailable'), 'error');
	}
	$got_msg = true;
	$reload = false;
	break;

	case "show":
	if ($event = $this->driver->get_event_revison($event, $event['rev'])) {
	$this->rc->output->command('plugin.event_show_revision', $this->_client_event($event));
	}
	else {
	$this->rc->output->command('display_message', $this->gettext('objectnotfound'), 'error');
	}
	$got_msg = true;
	$reload = false;
	break;

	case "restore":
	if ($success = $this->driver->restore_event_revision($event, $event['rev'])) {
	$_event = $this->driver->get_event($event);
	$reload = $_event['recurrence'] ? 2 : 1;
	$this->rc->output->command('display_message', $this->gettext(array('name' => 'objectrestoresuccess', 'vars' => array('rev' => $event['rev']))), 'confirmation');
	$this->rc->output->command('plugin.close_history_dialog');
	}
	else {
	$this->rc->output->command('display_message', $this->gettext('objectrestoreerror'), 'error');
	$reload = 0;
	}
	$got_msg = true;
	break;
	}

	// show confirmation/error message
	if (!$got_msg) {
	if ($success)
	$this->rc->output->show_message('successfullysaved', 'confirmation');
	else
	$this->rc->output->show_message('calendar.errorsaving', 'error');
	}

	// unlock client
	$this->rc->output->command('plugin.unlock_saving');

	// update event object on the client or trigger a complete refretch if too complicated
	if ($reload) {
	$args = array('source' => $event['calendar']);
	if ($reload > 1)
	$args['refetch'] = true;
	else if ($success && $action != 'remove')
	$args['update'] = $this->_client_event($this->driver->get_event($event), true);
	$this->rc->output->command('plugin.refresh_calendar', $args);
	}
	}

	/**
	* Helper method sending iTip notifications after successful event updates
	*/
	private function event_save_success(&$event, $old, $action, $success)
	{
	// $success is a new event ID
	if ($success !== true) {
	// send update notification on the main event
	if ($event['_savemode'] == 'future' && $event['_notify'] && $old['attendees'] && $old['recurrence_id']) {
	$master = $this->driver->get_event(array('id' => $old['recurrence_id'], 'calendar' => $old['calendar']), 0, true);
	unset($master['_instance'], $master['recurrence_date']);

	$sent = $this->notify_attendees($master, null, $action, $event['_comment'], false);
	if ($sent < 0)
	$this->rc->output->show_message('calendar.errornotifying', 'error');

	$event['attendees'] = $master['attendees']; // this tricks us into the next if clause
	}

	// delete old reference if saved as new
	if ($event['_savemode'] == 'future' \|\| $event['_savemode'] == 'new') {
	$old = null;
	}

	$event['id'] = $success;
	$event['_savemode'] = 'all';
	}

	// send out notifications
	if ($event['_notify'] && ($event['attendees'] \|\| $old['attendees'])) {
	$_savemode = $event['_savemode'];

	// send notification for the main event when savemode is 'all'
	if ($action != 'remove' && $_savemode == 'all' && ($event['recurrence_id'] \|\| $old['recurrence_id'] \|\| ($old && $old['id'] != $event['id']))) {
	$event['id'] = $event['recurrence_id'] ?: ($old['recurrence_id'] ?: $old['id']);
	$event = $this->driver->get_event($event, 0, true);
	unset($event['_instance'], $event['recurrence_date']);
	}
	else {
	// make sure we have the complete record
	$event = $action == 'remove' ? $old : $this->driver->get_event($event, 0, true);
	}

	$event['_savemode'] = $_savemode;

	if ($old) {
	$old['thisandfuture'] = $_savemode == 'future';
	}

	// only notify if data really changed (TODO: do diff check on client already)
	if (!$old \|\| $action == 'remove' \|\| self::event_diff($event, $old)) {
	$sent = $this->notify_attendees($event, $old, $action, $event['_comment']);
	if ($sent > 0)
	$this->rc->output->show_message('calendar.itipsendsuccess', 'confirmation');
	else if ($sent < 0)
	$this->rc->output->show_message('calendar.errornotifying', 'error');
	}
	}
	}

	/**
	* Handler for load-requests from fullcalendar
	* This will return pure JSON formatted output
	*/
	function load_events()
	{
	$events = $this->driver->load_events(
	rcube_utils::get_input_value('start', rcube_utils::INPUT_GET),
	rcube_utils::get_input_value('end', rcube_utils::INPUT_GET),
	($query = rcube_utils::get_input_value('q', rcube_utils::INPUT_GET)),
	rcube_utils::get_input_value('source', rcube_utils::INPUT_GET)
	);
	echo $this->encode($events, !empty($query));
	exit;
	}

	/**
	* Handler for requests fetching event counts for calendars
	*/
	public function count_events()
	{
	// don't update session on these requests (avoiding race conditions)
	$this->rc->session->nowrite = true;

	$start = rcube_utils::get_input_value('start', rcube_utils::INPUT_GET);
	if (!$start) {
	$start = new DateTime('today 00:00:00', $this->timezone);
	$start = $start->format('U');
	}

	$counts = $this->driver->count_events(
	rcube_utils::get_input_value('source', rcube_utils::INPUT_GET),
	$start,
	rcube_utils::get_input_value('end', rcube_utils::INPUT_GET)
	);

	$this->rc->output->command('plugin.update_counts', array('counts' => $counts));
	}

	/**
	* Load event data from an iTip message attachment
	*/
	public function itip_events($msgref)
	{
	$path = explode('/', $msgref);
	$msg = array_pop($path);
	$mbox = join('/', $path);
	list($uid, $mime_id) = explode('#', $msg);
	$events = array();

	if ($event = $this->lib->mail_get_itip_object($mbox, $uid, $mime_id, 'event')) {
	$partstat = 'NEEDS-ACTION';
	/*
	$user_emails = $this->lib->get_user_emails();
	foreach ($event['attendees'] as $attendee) {
	if (in_array($attendee['email'], $user_emails)) {
	$partstat = $attendee['status'];
	break;
	}
	}
	*/
	$event['id'] = $event['uid'];
	$event['temporary'] = true;
	$event['readonly'] = true;
	$event['calendar'] = '--invitation--itip';
	$event['className'] = 'fc-invitation-' . strtolower($partstat);
	$event['_mbox'] = $mbox;
	$event['_uid'] = $uid;
	$event['_part'] = $mime_id;

	$events[] = $this->_client_event($event, true);

	// add recurring instances
	if (!empty($event['recurrence'])) {
	foreach ($this->driver->get_recurring_events($event, $event['start']) as $recurring) {
	$recurring['temporary'] = true;
	$recurring['readonly'] = true;
	$recurring['calendar'] = '--invitation--itip';
	$events[] = $this->_client_event($recurring, true);
	}
	}
	}

	return $events;
	}

	/**
	* Handler for keep-alive requests
	* This will check for updated data in active calendars and sync them to the client
	*/
	public function refresh($attr)
	{
	// refresh the entire calendar every 10th time to also sync deleted events
	if (rand(0,10) == 10) {
	$this->rc->output->command('plugin.refresh_calendar', array('refetch' => true));
	return;
	}

	$counts = array();

	foreach ($this->driver->list_calendars(calendar_driver::FILTER_ACTIVE) as $cal) {
	$events = $this->driver->load_events(
	rcube_utils::get_input_value('start', rcube_utils::INPUT_GPC),
	rcube_utils::get_input_value('end', rcube_utils::INPUT_GPC),
	rcube_utils::get_input_value('q', rcube_utils::INPUT_GPC),
	$cal['id'],
	1,
	$attr['last']
	);

	foreach ($events as $event) {
	$this->rc->output->command('plugin.refresh_calendar',
	array('source' => $cal['id'], 'update' => $this->_client_event($event)));
	}

	// refresh count for this calendar
	if ($cal['counts']) {
	$today = new DateTime('today 00:00:00', $this->timezone);
	$counts += $this->driver->count_events($cal['id'], $today->format('U'));
	}
	}

	if (!empty($counts)) {
	$this->rc->output->command('plugin.update_counts', array('counts' => $counts));
	}
	}

	/**
	* Handler for pending_alarms plugin hook triggered by the calendar module on keep-alive requests.
	* This will check for pending notifications and pass them to the client
	*/
	public function pending_alarms($p)
	{
	$this->load_driver();
	$time = $p['time'] ?: time();
	if ($alarms = $this->driver->pending_alarms($time)) {
	foreach ($alarms as $alarm) {
	$alarm['id'] = 'cal:' . $alarm['id']; // prefix ID with cal:
	$p['alarms'][] = $alarm;
	}
	}

	// get alarms for birthdays calendar
	if ($this->rc->config->get('calendar_contact_birthdays') && $this->rc->config->get('calendar_birthdays_alarm_type') == 'DISPLAY') {
	$cache = $this->rc->get_cache('calendar.birthdayalarms', 'db');

	foreach ($this->driver->load_birthday_events($time, $time + 86400 * 60) as $e) {
	$alarm = libcalendaring::get_next_alarm($e);

	// overwrite alarm time with snooze value (or null if dismissed)
	if ($dismissed = $cache->get($e['id']))
	$alarm['time'] = $dismissed['notifyat'];

	// add to list if alarm is set
	if ($alarm && $alarm['time'] && $alarm['time'] <= $time) {
	$e['id'] = 'cal:bday:' . $e['id'];
	$e['notifyat'] = $alarm['time'];
	$p['alarms'][] = $e;
	}
	}
	}

	return $p;
	}

	/**
	* Handler for alarm dismiss hook triggered by libcalendaring
	*/
	public function dismiss_alarms($p)
	{
	$this->load_driver();
	foreach ((array)$p['ids'] as $id) {
	if (strpos($id, 'cal:bday:') === 0) {
	$p['success'] \|= $this->driver->dismiss_birthday_alarm(substr($id, 9), $p['snooze']);
	}
	else if (strpos($id, 'cal:') === 0) {
	$p['success'] \|= $this->driver->dismiss_alarm(substr($id, 4), $p['snooze']);
	}
	}

	return $p;
	}

	/**
	* Handler for check-recent requests which are accidentally sent to calendar taks
	*/
	function check_recent()
	{
	// NOP
	$this->rc->output->send();
	}

	/**
	* Hook triggered when a contact is saved
	*/
	function contact_update($p)
	{
	// clear birthdays calendar cache
	if (!empty($p['record']['birthday'])) {
	$cache = $this->rc->get_cache('calendar.birthdays', 'db');
	$cache->remove();
	}
	}

	/**
	*
	*/
	function import_events()
	{
	// Upload progress update
	if (!empty($_GET['_progress'])) {
	- rcube_upload_progress();
	+ $this->rc->upload_progress();
	}

	@set_time_limit(0);

	// process uploaded file if there is no error
	$err = $_FILES['_data']['error'];

	if (!$err && $_FILES['_data']['tmp_name']) {
	$calendar = rcube_utils::get_input_value('calendar', rcube_utils::INPUT_GPC);
	$rangestart = $_REQUEST['_range'] ? date_create("now -" . intval($_REQUEST['_range']) . " months") : 0;

	// extract zip file
	if ($_FILES['_data']['type'] == 'application/zip') {
	$count = 0;
	if (class_exists('ZipArchive', false)) {
	$zip = new ZipArchive();
	if ($zip->open($_FILES['_data']['tmp_name'])) {
	$randname = uniqid('zip-' . session_id(), true);
	$tmpdir = slashify($this->rc->config->get('temp_dir', sys_get_temp_dir())) . $randname;
	mkdir($tmpdir, 0700);

	// extract each ical file from the archive and import it
	for ($i = 0; $i < $zip->numFiles; $i++) {
	$filename = $zip->getNameIndex($i);
	if (preg_match('/\.ics$/i', $filename)) {
	$tmpfile = $tmpdir . '/' . basename($filename);
	if (copy('zip://' . $_FILES['_data']['tmp_name'] . '#'.$filename, $tmpfile)) {
	$count += $this->import_from_file($tmpfile, $calendar, $rangestart, $errors);
	unlink($tmpfile);
	}
	}
	}

	rmdir($tmpdir);
	$zip->close();
	}
	else {
	$errors = 1;
	$msg = 'Failed to open zip file.';
	}
	}
	else {
	$errors = 1;
	$msg = 'Zip files are not supported for import.';
	}
	}
	else {
	// attempt to import teh uploaded file directly
	$count = $this->import_from_file($_FILES['_data']['tmp_name'], $calendar, $rangestart, $errors);
	}

	if ($count) {
	$this->rc->output->command('display_message', $this->gettext(array('name' => 'importsuccess', 'vars' => array('nr' => $count))), 'confirmation');
	$this->rc->output->command('plugin.import_success', array('source' => $calendar, 'refetch' => true));
	}
	else if (!$errors) {
	$this->rc->output->command('display_message', $this->gettext('importnone'), 'notice');
	$this->rc->output->command('plugin.import_success', array('source' => $calendar));
	}
	else {
	$this->rc->output->command('plugin.import_error', array('message' => $this->gettext('importerror') . ($msg ? ': ' . $msg : '')));
	}
	}
	else {
	if ($err == UPLOAD_ERR_INI_SIZE \|\| $err == UPLOAD_ERR_FORM_SIZE) {
	- $msg = rcube_label(array('name' => 'filesizeerror', 'vars' => array(
	- 'size' => show_bytes(parse_bytes(ini_get('upload_max_filesize'))))));
	+ $msg = $this->gettext(array('name' => 'filesizeerror', 'vars' => array(
	+ 'size' => $this->rc->show_bytes(parse_bytes(ini_get('upload_max_filesize'))))));
	}
	else {
	- $msg = rcube_label('fileuploaderror');
	+ $msg = $this->gettext('fileuploaderror');
	}

	$this->rc->output->command('plugin.import_error', array('message' => $msg));
	}

	$this->rc->output->send('iframe');
	}

	/**
	* Helper function to parse and import a single .ics file
	*/
	private function import_from_file($filepath, $calendar, $rangestart, &$errors)
	{
	$user_email = $this->rc->user->get_username();

	$ical = $this->get_ical();
	$errors = !$ical->fopen($filepath);
	$count = $i = 0;
	foreach ($ical as $event) {
	// keep the browser connection alive on long import jobs
	if (++$i > 100 && $i % 100 == 0) {
	echo "<!-- -->";
	ob_flush();
	}

	// TODO: correctly handle recurring events which start before $rangestart
	if ($event['end'] < $rangestart && (!$event['recurrence'] \|\| ($event['recurrence']['until'] && $event['recurrence']['until'] < $rangestart)))
	continue;

	$event['_owner'] = $user_email;
	$event['calendar'] = $calendar;
	if ($this->driver->new_event($event)) {
	$count++;
	}
	else {
	$errors++;
	}
	}

	return $count;
	}


	/**
	* Construct the ics file for exporting events to iCalendar format;
	*/
	function export_events($terminate = true)
	{
	$start = rcube_utils::get_input_value('start', rcube_utils::INPUT_GET);
	$end = rcube_utils::get_input_value('end', rcube_utils::INPUT_GET);

	if (!isset($start))
	$start = 'today -1 year';
	if (!is_numeric($start))
	$start = strtotime($start . ' 00:00:00');
	if (!$end)
	$end = 'today +10 years';
	if (!is_numeric($end))
	$end = strtotime($end . ' 23:59:59');

	$event_id = rcube_utils::get_input_value('id', rcube_utils::INPUT_GET);
	$attachments = rcube_utils::get_input_value('attachments', rcube_utils::INPUT_GET);
	$calid = $filename = rcube_utils::get_input_value('source', rcube_utils::INPUT_GET);

	$calendars = $this->driver->list_calendars();
	$events = array();

	if ($calendars[$calid]) {
	$filename = $calendars[$calid]['name'] ? $calendars[$calid]['name'] : $calid;
	$filename = asciiwords(html_entity_decode($filename)); // to 7bit ascii
	if (!empty($event_id)) {
	if ($event = $this->driver->get_event(array('calendar' => $calid, 'id' => $event_id), 0, true)) {
	if ($event['recurrence_id']) {
	$event = $this->driver->get_event(array('calendar' => $calid, 'id' => $event['recurrence_id']), 0, true);
	}
	$events = array($event);
	$filename = asciiwords($event['title']);
	if (empty($filename))
	$filename = 'event';
	}
	}
	else {
	$events = $this->driver->load_events($start, $end, null, $calid, 0);
	if (empty($filename))
	$filename = $calid;
	}
	}

	header("Content-Type: text/calendar");
	header("Content-Disposition: inline; filename=".$filename.'.ics');

	$this->get_ical()->export($events, '', true, $attachments ? array($this->driver, 'get_attachment_body') : null);

	if ($terminate)
	exit;
	}


	/**
	* Handler for iCal feed requests
	*/
	function ical_feed_export()
	{
	$session_exists = !empty($_SESSION['user_id']);

	// process HTTP auth info
	if (!empty($_SERVER['PHP_AUTH_USER']) && isset($_SERVER['PHP_AUTH_PW'])) {
	$_POST['_user'] = $_SERVER['PHP_AUTH_USER']; // used for rcmail::autoselect_host()
	$auth = $this->rc->plugins->exec_hook('authenticate', array(
	'host' => $this->rc->autoselect_host(),
	'user' => trim($_SERVER['PHP_AUTH_USER']),
	'pass' => $_SERVER['PHP_AUTH_PW'],
	'cookiecheck' => true,
	'valid' => true,
	));
	if ($auth['valid'] && !$auth['abort'])
	$this->rc->login($auth['user'], $auth['pass'], $auth['host']);
	}

	// require HTTP auth
	if (empty($_SESSION['user_id'])) {
	header('WWW-Authenticate: Basic realm="Roundcube Calendar"');
	header('HTTP/1.0 401 Unauthorized');
	exit;
	}

	// decode calendar feed hash
	$format = 'ics';
	$calhash = rcube_utils::get_input_value('_cal', rcube_utils::INPUT_GET);
	if (preg_match(($suff_regex = '/\.([a-z0-9]{3,5})$/i'), $calhash, $m)) {
	$format = strtolower($m[1]);
	$calhash = preg_replace($suff_regex, '', $calhash);
	}

	if (!strpos($calhash, ':'))
	$calhash = base64_decode($calhash);

	list($user, $_GET['source']) = explode(':', $calhash, 2);

	// sanity check user
	if ($this->rc->user->get_username() == $user) {
	$this->load_driver();
	$this->export_events(false);
	}
	else {
	header('HTTP/1.0 404 Not Found');
	}

	// don't save session data
	if (!$session_exists)
	session_destroy();
	exit;
	}


	/**
	*
	*/
	function load_settings()
	{
	$this->lib->load_settings();
	$this->defaults += $this->lib->defaults;

	$settings = array();

	// configuration
	$settings['default_calendar'] = $this->rc->config->get('calendar_default_calendar');
	$settings['default_view'] = (string)$this->rc->config->get('calendar_default_view', $this->defaults['calendar_default_view']);
	$settings['date_agenda'] = (string)$this->rc->config->get('calendar_date_agenda', $this->defaults['calendar_date_agenda']);

	$settings['timeslots'] = (int)$this->rc->config->get('calendar_timeslots', $this->defaults['calendar_timeslots']);
	$settings['first_day'] = (int)$this->rc->config->get('calendar_first_day', $this->defaults['calendar_first_day']);
	$settings['first_hour'] = (int)$this->rc->config->get('calendar_first_hour', $this->defaults['calendar_first_hour']);
	$settings['work_start'] = (int)$this->rc->config->get('calendar_work_start', $this->defaults['calendar_work_start']);
	$settings['work_end'] = (int)$this->rc->config->get('calendar_work_end', $this->defaults['calendar_work_end']);
	$settings['agenda_range'] = (int)$this->rc->config->get('calendar_agenda_range', $this->defaults['calendar_agenda_range']);
	$settings['agenda_sections'] = $this->rc->config->get('calendar_agenda_sections', $this->defaults['calendar_agenda_sections']);
	$settings['event_coloring'] = (int)$this->rc->config->get('calendar_event_coloring', $this->defaults['calendar_event_coloring']);
	$settings['time_indicator'] = (int)$this->rc->config->get('calendar_time_indicator', $this->defaults['calendar_time_indicator']);
	$settings['invite_shared'] = (int)$this->rc->config->get('calendar_allow_invite_shared', $this->defaults['calendar_allow_invite_shared']);
	$settings['invitation_calendars'] = (bool)$this->rc->config->get('kolab_invitation_calendars', false);
	$settings['itip_notify'] = (int)$this->rc->config->get('calendar_itip_send_option', $this->defaults['calendar_itip_send_option']);

	// get user identity to create default attendee
	if ($this->ui->screen == 'calendar') {
	foreach ($this->rc->user->list_emails() as $rec) {
	if (!$identity)
	$identity = $rec;
	$identity['emails'][] = $rec['email'];
	$settings['identities'][$rec['identity_id']] = $rec['email'];
	}
	$identity['emails'][] = $this->rc->user->get_username();
	$settings['identity'] = array('name' => $identity['name'], 'email' => strtolower($identity['email']), 'emails' => ';' . strtolower(join(';', $identity['emails'])));
	}

	return $settings;
	}

	/**
	* Encode events as JSON
	*
	* @param array Events as array
	* @param boolean Add CSS class names according to calendar and categories
	* @return string JSON encoded events
	*/
	function encode($events, $addcss = false)
	{
	$json = array();
	foreach ($events as $event) {
	$json[] = $this->_client_event($event, $addcss);
	}
	return json_encode($json);
	}

	/**
	* Convert an event object to be used on the client
	*/
	private function _client_event($event, $addcss = false)
	{
	// compose a human readable strings for alarms_text and recurrence_text
	if ($event['valarms']) {
	$event['alarms_text'] = libcalendaring::alarms_text($event['valarms']);
	$event['valarms'] = libcalendaring::to_client_alarms($event['valarms']);
	}
	if ($event['recurrence']) {
	$event['recurrence_text'] = $this->lib->recurrence_text($event['recurrence']);
	$event['recurrence'] = $this->lib->to_client_recurrence($event['recurrence'], $event['allday']);
	unset($event['recurrence_date']);
	}

	foreach ((array)$event['attachments'] as $k => $attachment) {
	$event['attachments'][$k]['classname'] = rcube_utils::file2class($attachment['mimetype'], $attachment['name']);
	}

	// convert link URIs references into structs
	if (array_key_exists('links', $event)) {
	foreach ((array)$event['links'] as $i => $link) {
	if (strpos($link, 'imap://') === 0 && ($msgref = $this->driver->get_message_reference($link))) {
	$event['links'][$i] = $msgref;
	}
	}
	}

	// check for organizer in attendees list
	$organizer = null;
	foreach ((array)$event['attendees'] as $i => $attendee) {
	if ($attendee['role'] == 'ORGANIZER') {
	$organizer = $attendee;
	}
	if ($attendee['status'] == 'DELEGATED' && $attendee['rsvp'] == false) {
	$event['attendees'][$i]['noreply'] = true;
	}
	else {
	unset($event['attendees'][$i]['noreply']);
	}
	}

	if ($organizer === null && !empty($event['organizer'])) {
	$organizer = $event['organizer'];
	$organizer['role'] = 'ORGANIZER';
	if (!is_array($event['attendees']))
	$event['attendees'] = array();
	array_unshift($event['attendees'], $organizer);
	}

	// mapping url => vurl because of the fullcalendar client script
	$event['vurl'] = $event['url'];
	unset($event['url']);

	return array(
	'_id' => $event['calendar'] . ':' . $event['id'], // unique identifier for fullcalendar
	'start' => $this->lib->adjust_timezone($event['start'], $event['allday'])->format('c'),
	'end' => $this->lib->adjust_timezone($event['end'], $event['allday'])->format('c'),
	// 'changed' might be empty for event recurrences (Bug #2185)
	'changed' => $event['changed'] ? $this->lib->adjust_timezone($event['changed'])->format('c') : null,
	'created' => $event['created'] ? $this->lib->adjust_timezone($event['created'])->format('c') : null,
	'title' => strval($event['title']),
	'description' => strval($event['description']),
	'location' => strval($event['location']),
	'className' => ($addcss ? 'fc-event-cal-'.asciiwords($event['calendar'], true).' ' : '') .
	'fc-event-cat-' . asciiwords(strtolower(join('-', (array)$event['categories'])), true) .
	rtrim(' ' . $event['className']),
	'allDay' => ($event['allday'] == 1),
	) + $event;
	}


	/**
	* Generate a unique identifier for an event
	*/
	public function generate_uid()
	{
	return strtoupper(md5(time() . uniqid(rand())) . '-' . substr(md5($this->rc->user->get_username()), 0, 16));
	}


	/**
	* TEMPORARY: generate random event data for testing
	* Create events by opening http://<roundcubeurl>/?_task=calendar&_action=randomdata&_num=500&_date=2014-08-01&_dev=120
	*/
	public function generate_randomdata()
	{
	@set_time_limit(0);

	$num = $_REQUEST['_num'] ? intval($_REQUEST['_num']) : 100;
	$date = $_REQUEST['_date'] ?: 'now';
	$dev = $_REQUEST['_dev'] ?: 30;
	$cats = array_keys($this->driver->list_categories());
	$cals = $this->driver->list_calendars(calendar_driver::FILTER_ACTIVE);
	$count = 0;

	while ($count++ < $num) {
	$spread = intval($dev) * 86400; // days
	$refdate = strtotime($date);
	$start = round(($refdate + rand(-$spread, $spread)) / 600) * 600;
	$duration = round(rand(30, 360) / 30) * 30 * 60;
	$allday = rand(0,20) > 18;
	$alarm = rand(-30,12) * 5;
	$fb = rand(0,2);

	if (date('G', $start) > 23)
	$start -= 3600;

	if ($allday) {
	$start = strtotime(date('Y-m-d 00:00:00', $start));
	$duration = 86399;
	}

	$title = '';
	$len = rand(2, 12);
	$words = explode(" ", "The Hough transform is named after Paul Hough who patented the method in 1962. It is a technique which can be used to isolate features of a particular shape within an image. Because it requires that the desired features be specified in some parametric form, the classical Hough transform is most commonly used for the de- tection of regular curves such as lines, circles, ellipses, etc. A generalized Hough transform can be employed in applications where a simple analytic description of a feature(s) is not possible. Due to the computational complexity of the generalized Hough algorithm, we restrict the main focus of this discussion to the classical Hough transform. Despite its domain restrictions, the classical Hough transform (hereafter referred to without the classical prefix ) retains many applications, as most manufac- tured parts (and many anatomical parts investigated in medical imagery) contain feature boundaries which can be described by regular curves. The main advantage of the Hough transform technique is that it is tolerant of gaps in feature boundary descriptions and is relatively unaffected by image noise.");
	// $chars = "!# abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890";
	for ($i = 0; $i < $len; $i++)
	$title .= $words[rand(0,count($words)-1)] . " ";

	$this->driver->new_event(array(
	'uid' => $this->generate_uid(),
	'start' => new DateTime('@'.$start),
	'end' => new DateTime('@'.($start + $duration)),
	'allday' => $allday,
	'title' => rtrim($title),
	'free_busy' => $fb == 2 ? 'outofoffice' : ($fb ? 'busy' : 'free'),
	'categories' => $cats[array_rand($cats)],
	'calendar' => array_rand($cals),
	'alarms' => $alarm > 0 ? "-{$alarm}M:DISPLAY" : '',
	'priority' => rand(0,9),
	));
	}

	$this->rc->output->redirect('');
	}

	/**
	* Handler for attachments upload
	*/
	public function attachment_upload()
	{
	$this->lib->attachment_upload(self::SESSION_KEY, 'cal-');
	}

	/**
	* Handler for attachments download/displaying
	*/
	public function attachment_get()
	{
	// show loading page
	if (!empty($_GET['_preload'])) {
	return $this->lib->attachment_loading_page();
	}

	$event_id = rcube_utils::get_input_value('_event', rcube_utils::INPUT_GPC);
	$calendar = rcube_utils::get_input_value('_cal', rcube_utils::INPUT_GPC);
	$id = rcube_utils::get_input_value('_id', rcube_utils::INPUT_GPC);
	$rev = rcube_utils::get_input_value('_rev', rcube_utils::INPUT_GPC);

	$event = array('id' => $event_id, 'calendar' => $calendar, 'rev' => $rev);
	$attachment = $this->driver->get_attachment($id, $event);

	// show part page
	if (!empty($_GET['_frame'])) {
	$this->lib->attachment = $attachment;
	$this->register_handler('plugin.attachmentframe', array($this->lib, 'attachment_frame'));
	$this->register_handler('plugin.attachmentcontrols', array($this->lib, 'attachment_header'));
	$this->rc->output->send('calendar.attachment');
	}
	// deliver attachment content
	else if ($attachment) {
	$attachment['body'] = $this->driver->get_attachment_body($id, $event);
	$this->lib->attachment_get($attachment);
	}

	// if we arrive here, the requested part was not found
	header('HTTP/1.1 404 Not Found');
	exit;
	}


	/**
	* Prepares new/edited event properties before save
	*/
	private function write_preprocess(&$event, $action)
	{
	// convert dates into DateTime objects in user's current timezone
	$event['start'] = new DateTime($event['start'], $this->timezone);
	$event['end'] = new DateTime($event['end'], $this->timezone);
	$event['allday'] = (bool)$event['allday'];

	// start/end is all we need for 'move' action (#1480)
	if ($action == 'move') {
	return;
	}

	// convert the submitted recurrence settings
	if (is_array($event['recurrence'])) {
	$event['recurrence'] = $this->lib->from_client_recurrence($event['recurrence'], $event['start']);
	}

	// convert the submitted alarm values
	if ($event['valarms']) {
	$event['valarms'] = libcalendaring::from_client_alarms($event['valarms']);
	}

	$attachments = array();
	$eventid = 'cal-'.$event['id'];

	if (is_array($_SESSION[self::SESSION_KEY]) && $_SESSION[self::SESSION_KEY]['id'] == $eventid) {
	if (!empty($_SESSION[self::SESSION_KEY]['attachments'])) {
	foreach ($_SESSION[self::SESSION_KEY]['attachments'] as $id => $attachment) {
	if (is_array($event['attachments']) && in_array($id, $event['attachments'])) {
	$attachments[$id] = $this->rc->plugins->exec_hook('attachment_get', $attachment);
	}
	}
	}
	}

	$event['attachments'] = $attachments;

	// convert link references into simple URIs
	if (array_key_exists('links', $event)) {
	$event['links'] = array_map(function($link) {
	return is_array($link) ? $link['uri'] : strval($link);
	}, (array)$event['links']);
	}

	// check for organizer in attendees
	if ($action == 'new' \|\| $action == 'edit') {
	if (!$event['attendees'])
	$event['attendees'] = array();

	$emails = $this->get_user_emails();
	$organizer = $owner = false;
	foreach ((array)$event['attendees'] as $i => $attendee) {
	if ($attendee['role'] == 'ORGANIZER')
	$organizer = $i;
	if ($attendee['email'] == in_array(strtolower($attendee['email']), $emails))
	$owner = $i;
	if (!isset($attendee['rsvp']))
	$event['attendees'][$i]['rsvp'] = true;
	else if (is_string($attendee['rsvp']))
	$event['attendees'][$i]['rsvp'] = $attendee['rsvp'] == 'true' \|\| $attendee['rsvp'] == '1';
	}

	// set new organizer identity
	if ($organizer !== false && !empty($event['_identity']) && ($identity = $this->rc->user->get_identity($event['_identity']))) {
	$event['attendees'][$organizer]['name'] = $identity['name'];
	$event['attendees'][$organizer]['email'] = $identity['email'];
	}

	// set owner as organizer if yet missing
	if ($organizer === false && $owner !== false) {
	$event['attendees'][$owner]['role'] = 'ORGANIZER';
	unset($event['attendees'][$owner]['rsvp']);
	}
	}

	// mapping url => vurl because of the fullcalendar client script
	if (array_key_exists('vurl', $event)) {
	$event['url'] = $event['vurl'];
	unset($event['vurl']);
	}
	}

	/**
	* Releases some resources after successful event save
	*/
	private function cleanup_event(&$event)
	{
	// remove temp. attachment files
	if (!empty($_SESSION[self::SESSION_KEY]) && ($eventid = $_SESSION[self::SESSION_KEY]['id'])) {
	$this->rc->plugins->exec_hook('attachments_cleanup', array('group' => $eventid));
	$this->rc->session->remove(self::SESSION_KEY);
	}
	}

	/**
	* Send out an invitation/notification to all event attendees
	*/
	private function notify_attendees($event, $old, $action = 'edit', $comment = null, $rsvp = null)
	{
	if ($action == 'remove' \|\| ($event['status'] == 'CANCELLED' && $old['status'] != $event['status'])) {
	$event['cancelled'] = true;
	$is_cancelled = true;
	}

	if ($rsvp === null)
	$rsvp = !$old \|\| $event['sequence'] > $old['sequence'];

	$itip = $this->load_itip();
	$emails = $this->get_user_emails();
	$itip_notify = (int)$this->rc->config->get('calendar_itip_send_option', $this->defaults['calendar_itip_send_option']);

	// add comment to the iTip attachment
	$event['comment'] = $comment;

	// set a valid recurrence-id if this is a recurrence instance
	libcalendaring::identify_recurrence_instance($event);

	// compose multipart message using PEAR:Mail_Mime
	$method = $action == 'remove' ? 'CANCEL' : 'REQUEST';
	$message = $itip->compose_itip_message($event, $method, $rsvp);

	// list existing attendees from $old event
	$old_attendees = array();
	foreach ((array)$old['attendees'] as $attendee) {
	$old_attendees[] = $attendee['email'];
	}

	// send to every attendee
	$sent = 0; $current = array();
	foreach ((array)$event['attendees'] as $attendee) {
	$current[] = strtolower($attendee['email']);

	// skip myself for obvious reasons
	if (!$attendee['email'] \|\| in_array(strtolower($attendee['email']), $emails))
	continue;

	// skip if notification is disabled for this attendee
	if ($attendee['noreply'] && $itip_notify & 2)
	continue;

	// skip if this attendee has delegated and set RSVP=FALSE
	if ($attendee['status'] == 'DELEGATED' && $attendee['rsvp'] === false)
	continue;

	// which template to use for mail text
	$is_new = !in_array($attendee['email'], $old_attendees);
	$is_rsvp = $is_new \|\| $event['sequence'] > $old['sequence'];
	$bodytext = $is_cancelled ? 'eventcancelmailbody' : ($is_new ? 'invitationmailbody' : 'eventupdatemailbody');
	$subject = $is_cancelled ? 'eventcancelsubject' : ($is_new ? 'invitationsubject' : ($event['title'] ? 'eventupdatesubject':'eventupdatesubjectempty'));

	$event['comment'] = $comment;

	// finally send the message
	if ($itip->send_itip_message($event, $method, $attendee, $subject, $bodytext, $message, $is_rsvp))
	$sent++;
	else
	$sent = -100;
	}

	// TODO: on change of a recurring (main) event, also send updates to differing attendess of recurrence exceptions

	// send CANCEL message to removed attendees
	foreach ((array)$old['attendees'] as $attendee) {
	if ($attendee['role'] == 'ORGANIZER' \|\| !$attendee['email'] \|\| in_array(strtolower($attendee['email']), $current))
	continue;

	$vevent = $old;
	$vevent['cancelled'] = $is_cancelled;
	$vevent['attendees'] = array($attendee);
	$vevent['comment'] = $comment;
	if ($itip->send_itip_message($vevent, 'CANCEL', $attendee, 'eventcancelsubject', 'eventcancelmailbody'))
	$sent++;
	else
	$sent = -100;
	}

	return $sent;
	}

	/**
	* Echo simple free/busy status text for the given user and time range
	*/
	public function freebusy_status()
	{
	$email = rcube_utils::get_input_value('email', rcube_utils::INPUT_GPC);
	$start = rcube_utils::get_input_value('start', rcube_utils::INPUT_GPC);
	$end = rcube_utils::get_input_value('end', rcube_utils::INPUT_GPC);

	// convert dates into unix timestamps
	if (!empty($start) && !is_numeric($start)) {
	$dts = new DateTime($start, $this->timezone);
	$start = $dts->format('U');
	}
	if (!empty($end) && !is_numeric($end)) {
	$dte = new DateTime($end, $this->timezone);
	$end = $dte->format('U');
	}

	if (!$start) $start = time();
	if (!$end) $end = $start + 3600;

	$fbtypemap = array(calendar::FREEBUSY_UNKNOWN => 'UNKNOWN', calendar::FREEBUSY_FREE => 'FREE', calendar::FREEBUSY_BUSY => 'BUSY', calendar::FREEBUSY_TENTATIVE => 'TENTATIVE', calendar::FREEBUSY_OOF => 'OUT-OF-OFFICE');
	$status = 'UNKNOWN';

	// if the backend has free-busy information
	$fblist = $this->driver->get_freebusy_list($email, $start, $end);
	if (is_array($fblist)) {
	$status = 'FREE';

	foreach ($fblist as $slot) {
	list($from, $to, $type) = $slot;
	if ($from < $end && $to > $start) {
	$status = isset($type) && $fbtypemap[$type] ? $fbtypemap[$type] : 'BUSY';
	break;
	}
	}
	}

	// let this information be cached for 5min
	send_future_expire_header(300);

	echo $status;
	exit;
	}

	/**
	* Return a list of free/busy time slots within the given period
	* Echo data in JSON encoding
	*/
	public function freebusy_times()
	{
	$email = rcube_utils::get_input_value('email', rcube_utils::INPUT_GPC);
	$start = rcube_utils::get_input_value('start', rcube_utils::INPUT_GPC);
	$end = rcube_utils::get_input_value('end', rcube_utils::INPUT_GPC);
	$interval = intval(rcube_utils::get_input_value('interval', rcube_utils::INPUT_GPC));
	$strformat = $interval > 60 ? 'Ymd' : 'YmdHis';

	// convert dates into unix timestamps
	if (!empty($start) && !is_numeric($start)) {
	$dts = rcube_utils::anytodatetime($start, $this->timezone);
	$start = $dts ? $dts->format('U') : null;
	}
	if (!empty($end) && !is_numeric($end)) {
	$dte = rcube_utils::anytodatetime($end, $this->timezone);
	$end = $dte ? $dte->format('U') : null;
	}

	if (!$start) $start = time();
	if (!$end) $end = $start + 86400 * 30;
	if (!$interval) $interval = 60; // 1 hour

	if (!$dte) {
	$dts = new DateTime('@'.$start);
	$dts->setTimezone($this->timezone);
	}

	$fblist = $this->driver->get_freebusy_list($email, $start, $end);
	$slots = array();

	// build a list from $start till $end with blocks representing the fb-status
	for ($s = 0, $t = $start; $t <= $end; $s++) {
	$status = self::FREEBUSY_UNKNOWN;
	$t_end = $t + $interval * 60;
	$dt = new DateTime('@'.$t);
	$dt->setTimezone($this->timezone);

	// determine attendee's status
	if (is_array($fblist)) {
	$status = self::FREEBUSY_FREE;
	foreach ($fblist as $slot) {
	list($from, $to, $type) = $slot;

	// check for possible all-day times
	if (gmdate('His', $from) == '000000' && gmdate('His', $to) == '235959') {
	// shift into the user's timezone for sane matching
	$from -= $this->gmt_offset;
	$to -= $this->gmt_offset;
	}

	if ($from < $t_end && $to > $t) {
	$status = isset($type) ? $type : self::FREEBUSY_BUSY;
	if ($status == self::FREEBUSY_BUSY) // can't get any worse :-)
	break;
	}
	}
	}

	$slots[$s] = $status;
	$times[$s] = intval($dt->format($strformat));
	$t = $t_end;
	}

	$dte = new DateTime('@'.$t_end);
	$dte->setTimezone($this->timezone);

	// let this information be cached for 5min
	send_future_expire_header(300);

	echo json_encode(array(
	'email' => $email,
	'start' => $dts->format('c'),
	'end' => $dte->format('c'),
	'interval' => $interval,
	'slots' => $slots,
	'times' => $times,
	));
	exit;
	}

	/**
	* Handler for printing calendars
	*/
	public function print_view()
	{
	$title = $this->gettext('print');

	$view = rcube_utils::get_input_value('view', rcube_utils::INPUT_GPC);
	if (!in_array($view, array('agendaWeek', 'agendaDay', 'month', 'table')))
	$view = 'agendaDay';

	$this->rc->output->set_env('view',$view);

	if ($date = rcube_utils::get_input_value('date', rcube_utils::INPUT_GPC))
	$this->rc->output->set_env('date', $date);

	if ($range = rcube_utils::get_input_value('range', rcube_utils::INPUT_GPC))
	$this->rc->output->set_env('listRange', intval($range));

	if (isset($_REQUEST['sections']))
	$this->rc->output->set_env('listSections', rcube_utils::get_input_value('sections', rcube_utils::INPUT_GPC));

	if ($search = rcube_utils::get_input_value('search', rcube_utils::INPUT_GPC)) {
	$this->rc->output->set_env('search', $search);
	$title .= ' "' . $search . '"';
	}

	// Add CSS stylesheets to the page header
	$skin_path = $this->local_skin_path();
	$this->include_stylesheet($skin_path . '/fullcalendar.css');
	$this->include_stylesheet($skin_path . '/print.css');

	// Add JS files to the page header
	$this->include_script('print.js');
	$this->include_script('lib/js/fullcalendar.js');

	$this->register_handler('plugin.calendar_css', array($this->ui, 'calendar_css'));
	$this->register_handler('plugin.calendar_list', array($this->ui, 'calendar_list'));

	$this->rc->output->set_pagetitle($title);
	$this->rc->output->send("calendar.print");
	}

	/**
	*
	*/
	public function get_inline_ui()
	{
	foreach (array('save','cancel','savingdata') as $label)
	$texts['calendar.'.$label] = $this->gettext($label);

	$texts['calendar.new_event'] = $this->gettext('createfrommail');

	$this->ui->init_templates();
	$this->ui->calendar_list(); # set env['calendars']
	echo $this->api->output->parse('calendar.eventedit', false, false);
	echo html::tag('script', array('type' => 'text/javascript'),
	"rcmail.set_env('calendars', " . json_encode($this->api->output->env['calendars']) . ");\n".
	"rcmail.set_env('deleteicon', '" . $this->api->output->env['deleteicon'] . "');\n".
	"rcmail.set_env('cancelicon', '" . $this->api->output->env['cancelicon'] . "');\n".
	"rcmail.set_env('loadingicon', '" . $this->api->output->env['loadingicon'] . "');\n".
	"rcmail.gui_object('attachmentlist', '" . $this->ui->attachmentlist_id . "');\n".
	"rcmail.add_label(" . json_encode($texts) . ");\n"
	);
	exit;
	}

	/**
	* Compare two event objects and return differing properties
	*
	* @param array Event A
	* @param array Event B
	* @return array List of differing event properties
	*/
	public static function event_diff($a, $b)
	{
	$diff = array();
	$ignore = array('changed' => 1, 'attachments' => 1);
	foreach (array_unique(array_merge(array_keys($a), array_keys($b))) as $key) {
	if (!$ignore[$key] && $key[0] != '_' && $a[$key] != $b[$key])
	$diff[] = $key;
	}

	// only compare number of attachments
	if (count($a['attachments']) != count($b['attachments']))
	$diff[] = 'attachments';

	return $diff;
	}

	/**
	* Update attendee properties on the given event object
	*
	* @param array The event object to be altered
	* @param array List of hash arrays each represeting an updated/added attendee
	*/
	public static function merge_attendee_data(&$event, $attendees, $removed = null)
	{
	if (!empty($attendees) && !is_array($attendees[0])) {
	$attendees = array($attendees);
	}

	foreach ($attendees as $attendee) {
	$found = false;

	foreach ($event['attendees'] as $i => $candidate) {
	if ($candidate['email'] == $attendee['email']) {
	$event['attendees'][$i] = $attendee;
	$found = true;
	break;
	}
	}

	if (!$found) {
	$event['attendees'][] = $attendee;
	}
	}

	// filter out removed attendees
	if (!empty($removed)) {
	$event['attendees'] = array_filter($event['attendees'], function($attendee) use ($removed) {
	return !in_array($attendee['email'], $removed);
	});
	}
	}


	/** Resource management functions **/

	/**
	* Getter for the configured implementation of the resource directory interface
	*/
	private function resources_directory()
	{
	if (is_object($this->resources_dir)) {
	return $this->resources_dir;
	}

	if ($driver_name = $this->rc->config->get('calendar_resources_driver')) {
	$driver_class = 'resources_driver_' . $driver_name;

	require_once($this->home . '/drivers/resources_driver.php');
	require_once($this->home . '/drivers/' . $driver_name . '/' . $driver_class . '.php');

	$this->resources_dir = new $driver_class($this);
	}

	return $this->resources_dir;
	}

	/**
	* Handler for resoruce autocompletion requests
	*/
	public function resources_autocomplete()
	{
	$search = rcube_utils::get_input_value('_search', rcube_utils::INPUT_GPC, true);
	$sid = rcube_utils::get_input_value('_reqid', rcube_utils::INPUT_GPC);
	$maxnum = (int)$this->rc->config->get('autocomplete_max', 15);
	$results = array();

	if ($directory = $this->resources_directory()) {
	foreach ($directory->load_resources($search, $maxnum) as $rec) {
	$results[] = array(
	'name' => $rec['name'],
	'email' => $rec['email'],
	'type' => $rec['_type'],
	);
	}
	}

	$this->rc->output->command('ksearch_query_results', $results, $search, $sid);
	$this->rc->output->send();
	}

	/**
	* Handler for load-requests for resource data
	*/
	function resources_list()
	{
	$data = array();

	if ($directory = $this->resources_directory()) {
	foreach ($directory->load_resources() as $rec) {
	$data[] = $rec;
	}
	}

	$this->rc->output->command('plugin.resource_data', $data);
	$this->rc->output->send();
	}

	/**
	* Handler for requests loading resource owner information
	*/
	function resources_owner()
	{
	if ($directory = $this->resources_directory()) {
	$id = rcube_utils::get_input_value('_id', rcube_utils::INPUT_GPC);
	$data = $directory->get_resource_owner($id);
	}

	$this->rc->output->command('plugin.resource_owner', $data);
	$this->rc->output->send();
	}

	/**
	* Deliver event data for a resource's calendar
	*/
	function resources_calendar()
	{
	$events = array();

	if ($directory = $this->resources_directory()) {
	$events = $directory->get_resource_calendar(
	rcube_utils::get_input_value('_id', rcube_utils::INPUT_GPC),
	rcube_utils::get_input_value('start', rcube_utils::INPUT_GET),
	rcube_utils::get_input_value('end', rcube_utils::INPUT_GET));
	}

	echo $this->encode($events);
	exit;
	}


	/** Event invitation plugin hooks **/

	/**
	* Handler for calendar/itip-status requests
	*/
	function event_itip_status()
	{
	$data = rcube_utils::get_input_value('data', rcube_utils::INPUT_POST, true);

	// find local copy of the referenced event
	$this->load_driver();
	$existing = $this->driver->get_event($data, calendar_driver::FILTER_WRITEABLE \| calendar_driver::FILTER_PERSONAL);

	$itip = $this->load_itip();
	$response = $itip->get_itip_status($data, $existing);

	// get a list of writeable calendars to save new events to
	if (!$existing && !$data['nosave'] && $response['action'] == 'rsvp' \|\| $response['action'] == 'import') {
	$calendars = $this->driver->list_calendars(calendar_driver::FILTER_PERSONAL);
	$calendar_select = new html_select(array('name' => 'calendar', 'id' => 'itip-saveto', 'is_escaped' => true));
	$calendar_select->add('--', '');
	$numcals = 0;
	foreach ($calendars as $calendar) {
	if ($calendar['editable']) {
	$calendar_select->add($calendar['name'], $calendar['id']);
	$numcals++;
	}
	}
	if ($numcals <= 1)
	$calendar_select = null;
	}

	if ($calendar_select) {
	$default_calendar = $this->get_default_calendar($data['sensitivity']);
	$response['select'] = html::span('folder-select', $this->gettext('saveincalendar') . ' ' .
	$calendar_select->show($default_calendar['id']));
	}
	else if ($data['nosave']) {
	$response['select'] = html::tag('input', array('type' => 'hidden', 'name' => 'calendar', 'id' => 'itip-saveto', 'value' => ''));
	}

	// render small agenda view for the respective day
	if ($data['method'] == 'REQUEST' && !empty($data['date']) && $response['action'] == 'rsvp') {
	$event_start = rcube_utils::anytodatetime($data['date']);
	$day_start = new Datetime(gmdate('Y-m-d 00:00', $data['date']), $this->lib->timezone);
	$day_end = new Datetime(gmdate('Y-m-d 23:59', $data['date']), $this->lib->timezone);

	// get events on that day from the user's personal calendars
	$calendars = $this->driver->list_calendars(calendar_driver::FILTER_PERSONAL);
	$events = $this->driver->load_events($day_start->format('U'), $day_end->format('U'), null, array_keys($calendars));
	usort($events, function($a, $b) { return $a['start'] > $b['start'] ? 1 : -1; });

	$before = $after = array();
	foreach ($events as $event) {
	// TODO: skip events with free_busy == 'free' ?
	if ($event['uid'] == $data['uid'] \|\| $event['end'] < $day_start \|\| $event['start'] > $day_end)
	continue;
	else if ($event['start'] < $event_start)
	$before[] = $this->mail_agenda_event_row($event);
	else
	$after[] = $this->mail_agenda_event_row($event);
	}

	$response['append'] = array(
	'selector' => '.calendar-agenda-preview',
	'replacements' => array(
	'%before%' => !empty($before) ? join("\n", array_slice($before, -3)) : html::div('event-row no-event', $this->gettext('noearlierevents')),
	'%after%' => !empty($after) ? join("\n", array_slice($after, 0, 3)) : html::div('event-row no-event', $this->gettext('nolaterevents')),
	),
	);
	}

	$this->rc->output->command('plugin.update_itip_object_status', $response);
	}

	/**
	* Handler for calendar/itip-remove requests
	*/
	function event_itip_remove()
	{
	$success = false;
	$uid = rcube_utils::get_input_value('uid', rcube_utils::INPUT_POST);
	$instance = rcube_utils::get_input_value('_instance', rcube_utils::INPUT_POST);
	$savemode = rcube_utils::get_input_value('_savemode', rcube_utils::INPUT_POST);

	// search for event if only UID is given
	if ($event = $this->driver->get_event(array('uid' => $uid, '_instance' => $instance), calendar_driver::FILTER_WRITEABLE)) {
	$event['_savemode'] = $savemode;
	$success = $this->driver->remove_event($event, true);
	}

	if ($success) {
	$this->rc->output->show_message('calendar.successremoval', 'confirmation');
	}
	else {
	$this->rc->output->show_message('calendar.errorsaving', 'error');
	}
	}

	/**
	* Handler for URLs that allow an invitee to respond on his invitation mail
	*/
	public function itip_attend_response($p)
	{
	if ($p['action'] == 'attend') {
	$this->ui->init();

	$this->rc->output->set_env('task', 'calendar'); // override some env vars
	$this->rc->output->set_env('refresh_interval', 0);
	$this->rc->output->set_pagetitle($this->gettext('calendar'));

	$itip = $this->load_itip();
	$token = rcube_utils::get_input_value('_t', rcube_utils::INPUT_GPC);

	// read event info stored under the given token
	if ($invitation = $itip->get_invitation($token)) {
	$this->token = $token;
	$this->event = $invitation['event'];

	// show message about cancellation
	if ($invitation['cancelled']) {
	$this->invitestatus = html::div('rsvp-status declined', $itip->gettext('eventcancelled'));
	}
	// save submitted RSVP status
	else if (!empty($_POST['rsvp'])) {
	$status = null;
	foreach (array('accepted','tentative','declined') as $method) {
	if ($_POST['rsvp'] == $itip->gettext('itip' . $method)) {
	$status = $method;
	break;
	}
	}

	// send itip reply to organizer
	$invitation['event']['comment'] = rcube_utils::get_input_value('_comment', rcube_utils::INPUT_POST);
	if ($status && $itip->update_invitation($invitation, $invitation['attendee'], strtoupper($status))) {
	$this->invitestatus = html::div('rsvp-status ' . strtolower($status), $itip->gettext('youhave'.strtolower($status)));
	}
	else
	$this->rc->output->command('display_message', $this->gettext('errorsaving'), 'error', -1);

	// if user is logged in...
	if ($this->rc->user->ID) {
	$this->load_driver();
	$invitation = $itip->get_invitation($token);

	// save the event to his/her default calendar if not yet present
	if (!$this->driver->get_event($this->event) && ($calendar = $this->get_default_calendar($invitation['event']['sensitivity']))) {
	$invitation['event']['calendar'] = $calendar['id'];
	if ($this->driver->new_event($invitation['event']))
	$this->rc->output->command('display_message', $this->gettext(array('name' => 'importedsuccessfully', 'vars' => array('calendar' => $calendar['name']))), 'confirmation');
	}
	}
	}

	$this->register_handler('plugin.event_inviteform', array($this, 'itip_event_inviteform'));
	$this->register_handler('plugin.event_invitebox', array($this->ui, 'event_invitebox'));

	if (!$this->invitestatus) {
	$this->itip->set_rsvp_actions(array('accepted','tentative','declined'));
	$this->register_handler('plugin.event_rsvp_buttons', array($this->ui, 'event_rsvp_buttons'));
	}

	$this->rc->output->set_pagetitle($itip->gettext('itipinvitation') . ' ' . $this->event['title']);
	}
	else
	$this->rc->output->command('display_message', $this->gettext('itipinvalidrequest'), 'error', -1);

	$this->rc->output->send('calendar.itipattend');
	}
	}

	/**
	*
	*/
	public function itip_event_inviteform($attrib)
	{
	$hidden = new html_hiddenfield(array('name' => "_t", 'value' => $this->token));
	return html::tag('form', array('action' => $this->rc->url(array('task' => 'calendar', 'action' => 'attend')), 'method' => 'post', 'noclose' => true) + $attrib) . $hidden->show();
	}

	/**
	*
	*/
	private function mail_agenda_event_row($event, $class = '')
	{
	$time = $event['allday'] ? $this->gettext('all-day') :
	$this->rc->format_date($event['start'], $this->rc->config->get('time_format')) . ' - ' .
	$this->rc->format_date($event['end'], $this->rc->config->get('time_format'));

	return html::div(rtrim('event-row ' . $class),
	html::span('event-date', $time) .
	html::span('event-title', Q($event['title']))
	);
	}

	/**
	*
	*/
	public function mail_messages_list($p)
	{
	if (in_array('attachment', (array)$p['cols']) && !empty($p['messages'])) {
	foreach ($p['messages'] as $header) {
	$part = new StdClass;
	$part->mimetype = $header->ctype;
	if (libcalendaring::part_is_vcalendar($part)) {
	$header->list_flags['attachmentClass'] = 'ical';
	}
	else if (in_array($header->ctype, array('multipart/alternative', 'multipart/mixed'))) {
	// TODO: fetch bodystructure and search for ical parts. Maybe too expensive?

	if (!empty($header->structure) && is_array($header->structure->parts)) {
	foreach ($header->structure->parts as $part) {
	if (libcalendaring::part_is_vcalendar($part) && !empty($part->ctype_parameters['method'])) {
	$header->list_flags['attachmentClass'] = 'ical';
	break;
	}
	}
	}
	}
	}
	}
	}

	/**
	* Add UI element to copy event invitations or updates to the calendar
	*/
	public function mail_messagebody_html($p)
	{
	// load iCalendar functions (if necessary)
	if (!empty($this->lib->ical_parts)) {
	$this->get_ical();
	$this->load_itip();
	}

	$html = '';
	$has_events = false;
	$ical_objects = $this->lib->get_mail_ical_objects();

	// show a box for every event in the file
	foreach ($ical_objects as $idx => $event) {
	if ($event['_type'] != 'event') // skip non-event objects (#2928)
	continue;

	$has_events = true;

	// get prepared inline UI for this event object
	if ($ical_objects->method) {
	$append = '';

	// prepare a small agenda preview to be filled with actual event data on async request
	if ($ical_objects->method == 'REQUEST') {
	$append = html::div('calendar-agenda-preview',
	html::tag('h3', 'preview-title', $this->gettext('agenda') . ' ' .
	html::span('date', $this->rc->format_date($event['start'], $this->rc->config->get('date_format')))
	) . '%before%' . $this->mail_agenda_event_row($event, 'current') . '%after%');
	}

	$html .= html::div('calendar-invitebox',
	$this->itip->mail_itip_inline_ui(
	$event,
	$ical_objects->method,
	$ical_objects->mime_id . ':' . $idx,
	'calendar',
	rcube_utils::anytodatetime($ical_objects->message_date),
	$this->rc->url(array('task' => 'calendar')) . '&view=agendaDay&date=' . $event['start']->format('U')
	) . $append
	);
	}

	// limit listing
	if ($idx >= 3)
	break;
	}

	// prepend event boxes to message body
	if ($html) {
	$this->ui->init();
	$p['content'] = $html . $p['content'];
	$this->rc->output->add_label('calendar.savingdata','calendar.deleteventconfirm','calendar.declinedeleteconfirm');
	}

	// add "Save to calendar" button into attachment menu
	if ($has_events) {
	$this->add_button(array(
	'id' => 'attachmentsavecal',
	'name' => 'attachmentsavecal',
	'type' => 'link',
	'wrapper' => 'li',
	'command' => 'attachment-save-calendar',
	'class' => 'icon calendarlink',
	'classact' => 'icon calendarlink active',
	'innerclass' => 'icon calendar',
	'label' => 'calendar.savetocalendar',
	), 'attachmentmenu');
	}

	return $p;
	}


	/**
	* Handler for POST request to import an event attached to a mail message
	*/
	public function mail_import_itip()
	{
	$itip_sending = $this->rc->config->get('calendar_itip_send_option', $this->defaults['calendar_itip_send_option']);

	$uid = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_POST);
	$mbox = rcube_utils::get_input_value('_mbox', rcube_utils::INPUT_POST);
	$mime_id = rcube_utils::get_input_value('_part', rcube_utils::INPUT_POST);
	$status = rcube_utils::get_input_value('_status', rcube_utils::INPUT_POST);
	$delete = intval(rcube_utils::get_input_value('_del', rcube_utils::INPUT_POST));
	$noreply = intval(rcube_utils::get_input_value('_noreply', rcube_utils::INPUT_POST));
	$noreply = $noreply \|\| $status == 'needs-action' \|\| $itip_sending === 0;
	$instance = rcube_utils::get_input_value('_instance', rcube_utils::INPUT_POST);
	$savemode = rcube_utils::get_input_value('_savemode', rcube_utils::INPUT_POST);

	$error_msg = $this->gettext('errorimportingevent');
	$success = false;
	$delegate = null;

	if ($status == 'delegated') {
	$delegates = rcube_mime::decode_address_list(rcube_utils::get_input_value('_to', rcube_utils::INPUT_POST, true), 1, false);
	$delegate = reset($delegates);

	if (empty($delegate) \|\| empty($delegate['mailto'])) {
	$this->rc->output->command('display_message', $this->gettext('libcalendaring.delegateinvalidaddress'), 'error');
	return;
	}
	}

	// successfully parsed events?
	if ($event = $this->lib->mail_get_itip_object($mbox, $uid, $mime_id, 'event')) {
	// forward iTip request to delegatee
	if ($delegate) {
	$rsvpme = intval(rcube_utils::get_input_value('_rsvp', rcube_utils::INPUT_POST));

	$itip = $this->load_itip();
	if ($itip->delegate_to($event, $delegate, $rsvpme ? true : false)) {
	$this->rc->output->show_message('calendar.itipsendsuccess', 'confirmation');
	}
	else {
	$this->rc->output->command('display_message', $this->gettext('itipresponseerror'), 'error');
	}

	// the delegator is set to non-participant, thus save as non-blocking
	$event['free_busy'] = 'free';
	}

	// find writeable calendar to store event
	$cal_id = !empty($_REQUEST['_folder']) ? rcube_utils::get_input_value('_folder', rcube_utils::INPUT_POST) : null;
	$dontsave = ($_REQUEST['_folder'] === '' && $event['_method'] == 'REQUEST');
	$calendars = $this->driver->list_calendars(calendar_driver::FILTER_PERSONAL);
	$calendar = $calendars[$cal_id];

	// select default calendar except user explicitly selected 'none'
	if (!$calendar && !$dontsave)
	$calendar = $this->get_default_calendar($event['sensitivity']);

	$metadata = array(
	'uid' => $event['uid'],
	'_instance' => $event['_instance'],
	'changed' => is_object($event['changed']) ? $event['changed']->format('U') : 0,
	'sequence' => intval($event['sequence']),
	'fallback' => strtoupper($status),
	'method' => $event['_method'],
	'task' => 'calendar',
	);

	// update my attendee status according to submitted method
	if (!empty($status)) {
	$organizer = null;
	$emails = $this->get_user_emails();
	foreach ($event['attendees'] as $i => $attendee) {
	if ($attendee['role'] == 'ORGANIZER') {
	$organizer = $attendee;
	}
	else if ($attendee['email'] && in_array(strtolower($attendee['email']), $emails)) {
	$event['attendees'][$i]['status'] = strtoupper($status);
	if (!in_array($event['attendees'][$i]['status'], array('NEEDS-ACTION','DELEGATED')))
	$event['attendees'][$i]['rsvp'] = false; // unset RSVP attribute

	$metadata['attendee'] = $attendee['email'];
	$metadata['rsvp'] = $attendee['role'] != 'NON-PARTICIPANT';
	$reply_sender = $attendee['email'];
	$event_attendee = $attendee;
	}
	}

	// add attendee with this user's default identity if not listed
	if (!$reply_sender) {
	$sender_identity = $this->rc->user->list_emails(true);
	$event['attendees'][] = array(
	'name' => $sender_identity['name'],
	'email' => $sender_identity['email'],
	'role' => 'OPT-PARTICIPANT',
	'status' => strtoupper($status),
	);
	$metadata['attendee'] = $sender_identity['email'];
	}
	}

	// save to calendar
	if ($calendar && $calendar['editable']) {
	// check for existing event with the same UID
	$existing = $this->driver->get_event($event, calendar_driver::FILTER_WRITEABLE \| calendar_driver::FILTER_PERSONAL);

	if ($existing) {
	// forward savemode for correct updates of recurring events
	$existing['_savemode'] = $savemode ?: $event['_savemode'];

	// only update attendee status
	if ($event['_method'] == 'REPLY') {
	// try to identify the attendee using the email sender address
	$existing_attendee = -1;
	$existing_attendee_emails = array();
	foreach ($existing['attendees'] as $i => $attendee) {
	$existing_attendee_emails[] = $attendee['email'];
	if ($event['_sender'] && ($attendee['email'] == $event['_sender'] \|\| $attendee['email'] == $event['_sender_utf'])) {
	$existing_attendee = $i;
	}
	}
	$event_attendee = null;
	$update_attendees = array();
	foreach ($event['attendees'] as $attendee) {
	if ($event['_sender'] && ($attendee['email'] == $event['_sender'] \|\| $attendee['email'] == $event['_sender_utf'])) {
	$event_attendee = $attendee;
	$update_attendees[] = $attendee;
	$metadata['fallback'] = $attendee['status'];
	$metadata['attendee'] = $attendee['email'];
	$metadata['rsvp'] = $attendee['rsvp'] \|\| $attendee['role'] != 'NON-PARTICIPANT';
	if ($attendee['status'] != 'DELEGATED') {
	break;
	}
	}
	// also copy delegate attendee
	else if (!empty($attendee['delegated-from']) &&
	(stripos($attendee['delegated-from'], $event['_sender']) !== false \|\|
	stripos($attendee['delegated-from'], $event['_sender_utf']) !== false)) {
	$update_attendees[] = $attendee;
	if (!in_array($attendee['email'], $existing_attendee_emails)) {
	$existing['attendees'][] = $attendee;
	}
	}
	}

	// if delegatee has declined, set delegator's RSVP=True
	if ($event_attendee && $event_attendee['status'] == 'DECLINED' && $event_attendee['delegated-from']) {
	foreach ($existing['attendees'] as $i => $attendee) {
	if ($attendee['email'] == $event_attendee['delegated-from']) {
	$existing['attendees'][$i]['rsvp'] = true;
	break;
	}
	}
	}

	// found matching attendee entry in both existing and new events
	if ($existing_attendee >= 0 && $event_attendee) {
	$existing['attendees'][$existing_attendee] = $event_attendee;
	$success = $this->driver->update_attendees($existing, $update_attendees);
	}
	// update the entire attendees block
	else if (($event['sequence'] >= $existing['sequence'] \|\| $event['changed'] >= $existing['changed']) && $event_attendee) {
	$existing['attendees'][] = $event_attendee;
	$success = $this->driver->update_attendees($existing, $update_attendees);
	}
	else {
	$error_msg = $this->gettext('newerversionexists');
	}
	}
	// delete the event when declined (#1670)
	else if ($status == 'declined' && $delete) {
	$deleted = $this->driver->remove_event($existing, true);
	$success = true;
	}
	// import the (newer) event
	else if ($event['sequence'] >= $existing['sequence'] \|\| $event['changed'] >= $existing['changed']) {
	$event['id'] = $existing['id'];
	$event['calendar'] = $existing['calendar'];

	// preserve my participant status for regular updates
	if (empty($status)) {
	$emails = $this->get_user_emails();
	foreach ($event['attendees'] as $i => $attendee) {
	if ($attendee['email'] && in_array(strtolower($attendee['email']), $emails)) {
	foreach ($existing['attendees'] as $j => $_attendee) {
	if ($attendee['email'] == $_attendee['email']) {
	$event['attendees'][$i] = $existing['attendees'][$j];
	break;
	}
	}
	}
	}
	}

	// set status=CANCELLED on CANCEL messages
	if ($event['_method'] == 'CANCEL')
	$event['status'] = 'CANCELLED';
	// show me as free when declined (#1670)
	if ($status == 'declined' \|\| $event['status'] == 'CANCELLED' \|\| $event_attendee['role'] == 'NON-PARTICIPANT')
	$event['free_busy'] = 'free';

	$success = $this->driver->edit_event($event);
	}
	else if (!empty($status)) {
	$existing['attendees'] = $event['attendees'];
	if ($status == 'declined' \|\| $event_attendee['role'] == 'NON-PARTICIPANT') // show me as free when declined (#1670)
	$existing['free_busy'] = 'free';
	$success = $this->driver->edit_event($existing);
	}
	else
	$error_msg = $this->gettext('newerversionexists');
	}
	else if (!$existing && ($status != 'declined' \|\| $this->rc->config->get('kolab_invitation_calendars'))) {
	if ($status == 'declined' \|\| $event['status'] == 'CANCELLED' \|\| $event_attendee['role'] == 'NON-PARTICIPANT') {
	$event['free_busy'] = 'free';
	}

	// if the RSVP reply only refers to a single instance:
	// store unmodified master event with current instance as exception
	if (!empty($instance) && !empty($savemode) && $savemode != 'all') {
	$master = $this->lib->mail_get_itip_object($mbox, $uid, $mime_id, 'event');
	if ($master['recurrence'] && !$master['_instance']) {
	// compute recurring events until this instance's date
	if ($recurrence_date = rcube_utils::anytodatetime($instance, $master['start']->getTimezone())) {
	$recurrence_date->setTime(23,59,59);

	foreach ($this->driver->get_recurring_events($master, $master['start'], $recurrence_date) as $recurring) {
	if ($recurring['_instance'] == $instance) {
	// copy attendees block with my partstat to exception
	$recurring['attendees'] = $event['attendees'];
	$master['recurrence']['EXCEPTIONS'][] = $recurring;
	$event = $recurring; // set reference for iTip reply
	break;
	}
	}

	$master['calendar'] = $event['calendar'] = $calendar['id'];
	$success = $this->driver->new_event($master);
	}
	else {
	$master = null;
	}
	}
	else {
	$master = null;
	}
	}

	// save to the selected/default calendar
	if (!$master) {
	$event['calendar'] = $calendar['id'];
	$success = $this->driver->new_event($event);
	}
	}
	else if ($status == 'declined')
	$error_msg = null;
	}
	else if ($status == 'declined' \|\| $dontsave)
	$error_msg = null;
	else
	$error_msg = $this->gettext('nowritecalendarfound');
	}

	if ($success) {
	$message = $event['_method'] == 'REPLY' ? 'attendeupdateesuccess' : ($deleted ? 'successremoval' : ($existing ? 'updatedsuccessfully' : 'importedsuccessfully'));
	$this->rc->output->command('display_message', $this->gettext(array('name' => $message, 'vars' => array('calendar' => $calendar['name']))), 'confirmation');
	}

	if ($success \|\| $dontsave) {
	$metadata['calendar'] = $event['calendar'];
	$metadata['nosave'] = $dontsave;
	$metadata['rsvp'] = intval($metadata['rsvp']);
	$metadata['after_action'] = $this->rc->config->get('calendar_itip_after_action', $this->defaults['calendar_itip_after_action']);
	$this->rc->output->command('plugin.itip_message_processed', $metadata);
	$error_msg = null;
	}
	else if ($error_msg) {
	$this->rc->output->command('display_message', $error_msg, 'error');
	}

	// send iTip reply
	if ($event['_method'] == 'REQUEST' && $organizer && !$noreply && !in_array(strtolower($organizer['email']), $emails) && !$error_msg) {
	$event['comment'] = rcube_utils::get_input_value('_comment', rcube_utils::INPUT_POST);
	$itip = $this->load_itip();
	$itip->set_sender_email($reply_sender);
	if ($itip->send_itip_message($event, 'REPLY', $organizer, 'itipsubject' . $status, 'itipmailbody' . $status))
	$this->rc->output->command('display_message', $this->gettext(array('name' => 'sentresponseto', 'vars' => array('mailto' => $organizer['name'] ? $organizer['name'] : $organizer['email']))), 'confirmation');
	else
	$this->rc->output->command('display_message', $this->gettext('itipresponseerror'), 'error');
	}

	$this->rc->output->send();
	}


	/**
	* Handler for calendar/itip-remove requests
	*/
	function mail_itip_decline_reply()
	{
	$uid = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_POST);
	$mbox = rcube_utils::get_input_value('_mbox', rcube_utils::INPUT_POST);
	$mime_id = rcube_utils::get_input_value('_part', rcube_utils::INPUT_POST);

	if (($event = $this->lib->mail_get_itip_object($mbox, $uid, $mime_id, 'event')) && $event['_method'] == 'REPLY') {
	$event['comment'] = rcube_utils::get_input_value('_comment', rcube_utils::INPUT_POST);

	foreach ($event['attendees'] as $_attendee) {
	if ($_attendee['role'] != 'ORGANIZER') {
	$attendee = $_attendee;
	break;
	}
	}

	$itip = $this->load_itip();
	if ($itip->send_itip_message($event, 'CANCEL', $attendee, 'itipsubjectcancel', 'itipmailbodycancel'))
	$this->rc->output->command('display_message', $this->gettext(array('name' => 'sentresponseto', 'vars' => array('mailto' => $attendee['name'] ? $attendee['name'] : $attendee['email']))), 'confirmation');
	else
	$this->rc->output->command('display_message', $this->gettext('itipresponseerror'), 'error');
	}
	else {
	$this->rc->output->command('display_message', $this->gettext('itipresponseerror'), 'error');
	}
	}

	/**
	* Handler for calendar/itip-delegate requests
	*/
	function mail_itip_delegate()
	{
	// forward request to mail_import_itip() with the right status
	$_POST['_status'] = $_REQUEST['_status'] = 'delegated';
	$this->mail_import_itip();
	}

	/**
	* Import the full payload from a mail message attachment
	*/
	public function mail_import_attachment()
	{
	$uid = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_POST);
	$mbox = rcube_utils::get_input_value('_mbox', rcube_utils::INPUT_POST);
	$mime_id = rcube_utils::get_input_value('_part', rcube_utils::INPUT_POST);
	$charset = RCMAIL_CHARSET;

	// establish imap connection
	$imap = $this->rc->get_storage();
	$imap->set_mailbox($mbox);

	if ($uid && $mime_id) {
	$part = $imap->get_message_part($uid, $mime_id);
	if ($part->ctype_parameters['charset'])
	$charset = $part->ctype_parameters['charset'];
	// $headers = $imap->get_message_headers($uid);

	if ($part) {
	$events = $this->get_ical()->import($part, $charset);
	}
	}

	$success = $existing = 0;
	if (!empty($events)) {
	// find writeable calendar to store event
	$cal_id = !empty($_REQUEST['_calendar']) ? rcube_utils::get_input_value('_calendar', rcube_utils::INPUT_POST) : null;
	$calendars = $this->driver->list_calendars(calendar_driver::FILTER_PERSONAL);

	foreach ($events as $event) {
	// save to calendar
	$calendar = $calendars[$cal_id] ?: $this->get_default_calendar($event['sensitivity']);
	if ($calendar && $calendar['editable'] && $event['_type'] == 'event') {
	$event['calendar'] = $calendar['id'];

	if (!$this->driver->get_event($event['uid'], calendar_driver::FILTER_WRITEABLE)) {
	$success += (bool)$this->driver->new_event($event);
	}
	else {
	$existing++;
	}
	}
	}
	}

	if ($success) {
	$this->rc->output->command('display_message', $this->gettext(array(
	'name' => 'importsuccess',
	'vars' => array('nr' => $success),
	)), 'confirmation');
	}
	else if ($existing) {
	$this->rc->output->command('display_message', $this->gettext('importwarningexists'), 'warning');
	}
	else {
	$this->rc->output->command('display_message', $this->gettext('errorimportingevent'), 'error');
	}
	}

	/**
	* Read email message and return contents for a new event based on that message
	*/
	public function mail_message2event()
	{
	$uid = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_POST);
	$mbox = rcube_utils::get_input_value('_mbox', rcube_utils::INPUT_POST);
	$event = array();

	// establish imap connection
	$imap = $this->rc->get_storage();
	$imap->set_mailbox($mbox);
	$message = new rcube_message($uid);

	if ($message->headers) {
	$event['title'] = trim($message->subject);
	$event['description'] = trim($message->first_text_part());

	$this->load_driver();

	// add a reference to the email message
	if ($msgref = $this->driver->get_message_reference($message->headers, $mbox)) {
	$event['links'] = array($msgref);
	}
	// copy mail attachments to event
	else if ($message->attachments) {
	$eventid = 'cal-';
	if (!is_array($_SESSION[self::SESSION_KEY]) \|\| $_SESSION[self::SESSION_KEY]['id'] != $eventid) {
	$_SESSION[self::SESSION_KEY] = array();
	$_SESSION[self::SESSION_KEY]['id'] = $eventid;
	$_SESSION[self::SESSION_KEY]['attachments'] = array();
	}

	foreach ((array)$message->attachments as $part) {
	$attachment = array(
	'data' => $imap->get_message_part($uid, $part->mime_id, $part),
	'size' => $part->size,
	'name' => $part->filename,
	'mimetype' => $part->mimetype,
	'group' => $eventid,
	);

	$attachment = $this->rc->plugins->exec_hook('attachment_save', $attachment);

	if ($attachment['status'] && !$attachment['abort']) {
	$id = $attachment['id'];
	$attachment['classname'] = rcube_utils::file2class($attachment['mimetype'], $attachment['name']);

	// store new attachment in session
	unset($attachment['status'], $attachment['abort'], $attachment['data']);
	$_SESSION[self::SESSION_KEY]['attachments'][$id] = $attachment;

	$attachment['id'] = 'rcmfile' . $attachment['id']; // add prefix to consider it 'new'
	$event['attachments'][] = $attachment;
	}
	}
	}

	$this->rc->output->command('plugin.mail2event_dialog', $event);
	}
	else {
	$this->rc->output->command('display_message', $this->gettext('messageopenerror'), 'error');
	}

	$this->rc->output->send();
	}

	/**
	* Handler for the 'message_compose' plugin hook. This will check for
	* a compose parameter 'calendar_event' and create an attachment with the
	* referenced event in iCal format
	*/
	public function mail_message_compose($args)
	{
	// set the submitted event ID as attachment
	if (!empty($args['param']['calendar_event'])) {
	$this->load_driver();

	list($cal, $id) = explode(':', $args['param']['calendar_event'], 2);
	if ($event = $this->driver->get_event(array('id' => $id, 'calendar' => $cal))) {
	$filename = asciiwords($event['title']);
	if (empty($filename))
	$filename = 'event';

	// save ics to a temp file and register as attachment
	$tmp_path = tempnam($this->rc->config->get('temp_dir'), 'rcmAttmntCal');
	file_put_contents($tmp_path, $this->get_ical()->export(array($event), '', false, array($this->driver, 'get_attachment_body')));

	$args['attachments'][] = array('path' => $tmp_path, 'name' => $filename . '.ics', 'mimetype' => 'text/calendar');
	$args['param']['subject'] = $event['title'];
	}
	}

	return $args;
	}


	/**
	* Get a list of email addresses of the current user (from login and identities)
	*/
	public function get_user_emails()
	{
	return $this->lib->get_user_emails();
	}


	/**
	* Build an absolute URL with the given parameters
	*/
	public function get_url($param = array())
	{
	$param += array('task' => 'calendar');
	return $this->rc->url($param, true, true);
	}


	public function ical_feed_hash($source)
	{
	return base64_encode($this->rc->user->get_username() . ':' . $source);
	}

	/**
	* Handler for user_delete plugin hook
	*/
	public function user_delete($args)
	{
	// delete itipinvitations entries related to this user
	$db = $this->rc->get_dbh();
	$table_itipinvitations = $db->table_name('itipinvitations', true);
	$db->query("DELETE FROM $table_itipinvitations WHERE `user_id` = ?", $args['user']->ID);

	$this->load_driver();
	return $this->driver->user_delete($args);
	}

	/**
	* Magic getter for public access to protected members
	*/
	public function __get($name)
	{
	switch ($name) {
	case 'ical':
	return $this->get_ical();

	case 'itip':
	return $this->load_itip();

	case 'driver':
	$this->load_driver();
	return $this->driver;
	}

	return null;
	}

	}
	diff --git a/plugins/calendar/drivers/kolab/kolab_driver.php b/plugins/calendar/drivers/kolab/kolab_driver.php
	index 0cd273a4..4b17ead1 100644
	--- a/plugins/calendar/drivers/kolab/kolab_driver.php
	+++ b/plugins/calendar/drivers/kolab/kolab_driver.php
	@@ -1,2525 +1,2525 @@
	<?php

	/**
	* Kolab driver for the Calendar plugin
	*
	* @version @package_version@
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	* @author Aleksander Machniak <machniak@kolabsys.com>
	*
	* Copyright (C) 2012-2015, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	class kolab_driver extends calendar_driver
	{
	const INVITATIONS_CALENDAR_PENDING = '--invitation--pending';
	const INVITATIONS_CALENDAR_DECLINED = '--invitation--declined';

	// features this backend supports
	public $alarms = true;
	public $attendees = true;
	public $freebusy = true;
	public $attachments = true;
	public $undelete = true;
	public $alarm_types = array('DISPLAY','AUDIO');
	public $categoriesimmutable = true;

	private $rc;
	private $cal;
	private $calendars;
	private $has_writeable = false;
	private $freebusy_trigger = false;
	private $bonnie_api = false;

	/**
	* Default constructor
	*/
	public function __construct($cal)
	{
	$cal->require_plugin('libkolab');

	// load helper classes after libkolab has been loaded (#3248)
	require_once(dirname(__FILE__) . '/kolab_calendar.php');
	require_once(dirname(__FILE__) . '/kolab_user_calendar.php');
	require_once(dirname(__FILE__) . '/kolab_invitation_calendar.php');

	$this->cal = $cal;
	$this->rc = $cal->rc;
	$this->_read_calendars();

	$this->cal->register_action('push-freebusy', array($this, 'push_freebusy'));
	$this->cal->register_action('calendar-acl', array($this, 'calendar_acl'));

	$this->freebusy_trigger = $this->rc->config->get('calendar_freebusy_trigger', false);

	if (kolab_storage::$version == '2.0') {
	$this->alarm_types = array('DISPLAY');
	$this->alarm_absolute = false;
	}

	// get configuration for the Bonnie API
	$this->bonnie_api = libkolab::get_bonnie_api();

	// calendar uses fully encoded identifiers
	kolab_storage::$encode_ids = true;
	}


	/**
	* Read available calendars from server
	*/
	private function _read_calendars()
	{
	// already read sources
	if (isset($this->calendars))
	return $this->calendars;

	// get all folders that have "event" type, sorted by namespace/name
	$folders = kolab_storage::sort_folders(kolab_storage::get_folders('event') + kolab_storage::get_user_folders('event', true));
	$this->calendars = array();

	foreach ($folders as $folder) {
	if ($folder instanceof kolab_storage_folder_user) {
	$calendar = new kolab_user_calendar($folder->name, $this->cal);
	$calendar->subscriptions = count($folder->children) > 0;
	}
	else {
	$calendar = new kolab_calendar($folder->name, $this->cal);
	}

	if ($calendar->ready) {
	$this->calendars[$calendar->id] = $calendar;
	if ($calendar->editable)
	$this->has_writeable = true;
	}
	}

	return $this->calendars;
	}

	/**
	* Get a list of available calendars from this source
	*
	* @param integer $filter Bitmask defining filter criterias
	* @param object $tree Reference to hierarchical folder tree object
	*
	* @return array List of calendars
	*/
	public function list_calendars($filter = 0, &$tree = null)
	{
	// attempt to create a default calendar for this user
	if (!$this->has_writeable) {
	if ($this->create_calendar(array('name' => 'Calendar', 'color' => 'cc0000'))) {
	unset($this->calendars);
	$this->_read_calendars();
	}
	}

	$delim = $this->rc->get_storage()->get_hierarchy_delimiter();
	$folders = $this->filter_calendars($filter);
	$calendars = array();

	// include virtual folders for a full folder tree
	if (!is_null($tree))
	$folders = kolab_storage::folder_hierarchy($folders, $tree);

	foreach ($folders as $id => $cal) {
	$fullname = $cal->get_name();
	$listname = $cal->get_foldername();
	$imap_path = explode($delim, $cal->name);

	// find parent
	do {
	array_pop($imap_path);
	$parent_id = kolab_storage::folder_id(join($delim, $imap_path));
	}
	while (count($imap_path) > 1 && !$this->calendars[$parent_id]);

	// restore "real" parent ID
	if ($parent_id && !$this->calendars[$parent_id]) {
	$parent_id = kolab_storage::folder_id($cal->get_parent());
	}

	// turn a kolab_storage_folder object into a kolab_calendar
	if ($cal instanceof kolab_storage_folder) {
	$cal = new kolab_calendar($cal->name, $this->cal);
	$this->calendars[$cal->id] = $cal;
	}

	// special handling for user or virtual folders
	if ($cal instanceof kolab_storage_folder_user) {
	$calendars[$cal->id] = array(
	'id' => $cal->id,
	'name' => kolab_storage::object_name($fullname),
	'listname' => $listname,
	'editname' => $cal->get_foldername(),
	'color' => $cal->get_color(),
	'active' => $cal->is_active(),
	'title' => $cal->get_owner(),
	'owner' => $cal->get_owner(),
	'history' => false,
	'virtual' => false,
	'editable' => false,
	'group' => 'other',
	'class' => 'user',
	'removable' => true,
	);
	}
	else if ($cal->virtual) {
	$calendars[$cal->id] = array(
	'id' => $cal->id,
	'name' => $fullname,
	'listname' => $listname,
	'editname' => $cal->get_foldername(),
	'virtual' => true,
	'editable' => false,
	'group' => $cal->get_namespace(),
	'class' => 'folder',
	);
	}
	else {
	$calendars[$cal->id] = array(
	'id' => $cal->id,
	'name' => $fullname,
	'listname' => $listname,
	'editname' => $cal->get_foldername(),
	'title' => $cal->get_title(),
	'color' => $cal->get_color(),
	'editable' => $cal->editable,
	'rights' => $cal->rights,
	'showalarms' => $cal->alarms,
	'history' => !empty($this->bonnie_api),
	'group' => $cal->get_namespace(),
	'default' => $cal->default,
	'active' => $cal->is_active(),
	'owner' => $cal->get_owner(),
	'children' => true, // TODO: determine if that folder indeed has child folders
	'parent' => $parent_id,
	'subtype' => $cal->subtype,
	'caldavurl' => $cal->get_caldav_url(),
	'removable' => !$cal->default,
	);
	}

	if ($cal->subscriptions) {
	$calendars[$cal->id]['subscribed'] = $cal->is_subscribed();
	}
	}

	// list virtual calendars showing invitations
	if ($this->rc->config->get('kolab_invitation_calendars')) {
	foreach (array(self::INVITATIONS_CALENDAR_PENDING, self::INVITATIONS_CALENDAR_DECLINED) as $id) {
	$cal = new kolab_invitation_calendar($id, $this->cal);
	$this->calendars[$cal->id] = $cal;
	if (!($filter & self::FILTER_ACTIVE) \|\| $cal->is_active()) {
	$calendars[$id] = array(
	'id' => $cal->id,
	'name' => $cal->get_name(),
	'listname' => $cal->get_name(),
	'editname' => $cal->get_foldername(),
	'title' => $cal->get_title(),
	'color' => $cal->get_color(),
	'editable' => $cal->editable,
	'rights' => $cal->rights,
	'showalarms' => $cal->alarms,
	'history' => !empty($this->bonnie_api),
	'group' => 'x-invitations',
	'default' => false,
	'active' => $cal->is_active(),
	'owner' => $cal->get_owner(),
	'children' => false,
	);

	if ($id == self::INVITATIONS_CALENDAR_PENDING) {
	$calendars[$id]['counts'] = true;
	}

	if (is_object($tree)) {
	$tree->children[] = $cal;
	}
	}
	}
	}

	// append the virtual birthdays calendar
	if ($this->rc->config->get('calendar_contact_birthdays', false)) {
	$id = self::BIRTHDAY_CALENDAR_ID;
	$prefs = $this->rc->config->get('kolab_calendars', array()); // read local prefs
	if (!($filter & self::FILTER_ACTIVE) \|\| $prefs[$id]['active']) {
	$calendars[$id] = array(
	'id' => $id,
	'name' => $this->cal->gettext('birthdays'),
	'listname' => $this->cal->gettext('birthdays'),
	'color' => $prefs[$id]['color'] ?: '87CEFA',
	'active' => (bool)$prefs[$id]['active'],
	'showalarms' => (bool)$this->rc->config->get('calendar_birthdays_alarm_type'),
	'group' => 'x-birthdays',
	'editable' => false,
	'default' => false,
	'children' => false,
	'history' => false,
	);
	}
	}

	return $calendars;
	}

	/**
	* Get list of calendars according to specified filters
	*
	* @param integer Bitmask defining restrictions. See FILTER_* constants for possible values.
	*
	* @return array List of calendars
	*/
	protected function filter_calendars($filter)
	{
	$calendars = array();

	$plugin = $this->rc->plugins->exec_hook('calendar_list_filter', array(
	'list' => $this->calendars,
	'calendars' => $calendars,
	'filter' => $filter,
	'editable' => ($filter & self::FILTER_WRITEABLE),
	'insert' => ($filter & self::FILTER_INSERTABLE),
	'active' => ($filter & self::FILTER_ACTIVE),
	'personal' => ($filter & self::FILTER_PERSONAL)
	));

	if ($plugin['abort']) {
	return $plugin['calendars'];
	}

	foreach ($this->calendars as $cal) {
	if (!$cal->ready) {
	continue;
	}
	if (($filter & self::FILTER_WRITEABLE) && !$cal->editable) {
	continue;
	}
	if (($filter & self::FILTER_INSERTABLE) && !$cal->insert) {
	continue;
	}
	if (($filter & self::FILTER_ACTIVE) && !$cal->is_active()) {
	continue;
	}
	if (($filter & self::FILTER_PRIVATE) && $cal->subtype != 'private') {
	continue;
	}
	if (($filter & self::FILTER_CONFIDENTIAL) && $cal->subtype != 'confidential') {
	continue;
	}
	if (($filter & self::FILTER_PERSONAL) && $cal->get_namespace() != 'personal') {
	continue;
	}
	$calendars[$cal->id] = $cal;
	}

	return $calendars;
	}


	/**
	* Get the kolab_calendar instance for the given calendar ID
	*
	* @param string Calendar identifier (encoded imap folder name)
	* @return object kolab_calendar Object nor null if calendar doesn't exist
	*/
	public function get_calendar($id)
	{
	// create calendar object if necesary
	if (!$this->calendars[$id] && in_array($id, array(self::INVITATIONS_CALENDAR_PENDING, self::INVITATIONS_CALENDAR_DECLINED))) {
	$this->calendars[$id] = new kolab_invitation_calendar($id, $this->cal);
	}
	else if (!$this->calendars[$id] && $id !== self::BIRTHDAY_CALENDAR_ID) {
	$calendar = kolab_calendar::factory($id, $this->cal);
	if ($calendar->ready)
	$this->calendars[$calendar->id] = $calendar;
	}

	return $this->calendars[$id];
	}

	/**
	* Create a new calendar assigned to the current user
	*
	* @param array Hash array with calendar properties
	* name: Calendar name
	* color: The color of the calendar
	* @return mixed ID of the calendar on success, False on error
	*/
	public function create_calendar($prop)
	{
	$prop['type'] = 'event';
	$prop['active'] = true;
	$prop['subscribed'] = true;
	$folder = kolab_storage::folder_update($prop);

	if ($folder === false) {
	$this->last_error = $this->cal->gettext(kolab_storage::$last_error);
	return false;
	}

	// create ID
	$id = kolab_storage::folder_id($folder);

	// save color in user prefs (temp. solution)
	$prefs['kolab_calendars'] = $this->rc->config->get('kolab_calendars', array());

	if (isset($prop['color']))
	$prefs['kolab_calendars'][$id]['color'] = $prop['color'];
	if (isset($prop['showalarms']))
	$prefs['kolab_calendars'][$id]['showalarms'] = $prop['showalarms'] ? true : false;

	if ($prefs['kolab_calendars'][$id])
	$this->rc->user->save_prefs($prefs);

	return $id;
	}


	/**
	* Update properties of an existing calendar
	*
	* @see calendar_driver::edit_calendar()
	*/
	public function edit_calendar($prop)
	{
	if ($prop['id'] && ($cal = $this->get_calendar($prop['id']))) {
	$id = $cal->update($prop);
	}
	else {
	$id = $prop['id'];
	}

	// fallback to local prefs
	$prefs['kolab_calendars'] = $this->rc->config->get('kolab_calendars', array());
	unset($prefs['kolab_calendars'][$prop['id']]['color'], $prefs['kolab_calendars'][$prop['id']]['showalarms']);

	if (isset($prop['color']))
	$prefs['kolab_calendars'][$id]['color'] = $prop['color'];

	if (isset($prop['showalarms']) && $id == self::BIRTHDAY_CALENDAR_ID)
	$prefs['calendar_birthdays_alarm_type'] = $prop['showalarms'] ? $this->alarm_types[0] : '';
	else if (isset($prop['showalarms']))
	$prefs['kolab_calendars'][$id]['showalarms'] = $prop['showalarms'] ? true : false;

	if (!empty($prefs['kolab_calendars'][$id]))
	$this->rc->user->save_prefs($prefs);

	return true;
	}


	/**
	* Set active/subscribed state of a calendar
	*
	* @see calendar_driver::subscribe_calendar()
	*/
	public function subscribe_calendar($prop)
	{
	if ($prop['id'] && ($cal = $this->get_calendar($prop['id'])) && is_object($cal->storage)) {
	$ret = false;
	if (isset($prop['permanent']))
	$ret \|= $cal->storage->subscribe(intval($prop['permanent']));
	if (isset($prop['active']))
	$ret \|= $cal->storage->activate(intval($prop['active']));

	// apply to child folders, too
	if ($prop['recursive']) {
	foreach ((array)kolab_storage::list_folders($cal->storage->name, '*', 'event') as $subfolder) {
	if (isset($prop['permanent']))
	($prop['permanent'] ? kolab_storage::folder_subscribe($subfolder) : kolab_storage::folder_unsubscribe($subfolder));
	if (isset($prop['active']))
	($prop['active'] ? kolab_storage::folder_activate($subfolder) : kolab_storage::folder_deactivate($subfolder));
	}
	}
	return $ret;
	}
	else {
	// save state in local prefs
	$prefs['kolab_calendars'] = $this->rc->config->get('kolab_calendars', array());
	$prefs['kolab_calendars'][$prop['id']]['active'] = (bool)$prop['active'];
	$this->rc->user->save_prefs($prefs);
	return true;
	}

	return false;
	}


	/**
	* Delete the given calendar with all its contents
	*
	* @see calendar_driver::delete_calendar()
	*/
	public function delete_calendar($prop)
	{
	if ($prop['id'] && ($cal = $this->get_calendar($prop['id']))) {
	$folder = $cal->get_realname();
	// TODO: unsubscribe if no admin rights
	if (kolab_storage::folder_delete($folder)) {
	// remove color in user prefs (temp. solution)
	$prefs['kolab_calendars'] = $this->rc->config->get('kolab_calendars', array());
	unset($prefs['kolab_calendars'][$prop['id']]);

	$this->rc->user->save_prefs($prefs);
	return true;
	}
	else
	$this->last_error = kolab_storage::$last_error;
	}

	return false;
	}


	/**
	* Search for shared or otherwise not listed calendars the user has access
	*
	* @param string Search string
	* @param string Section/source to search
	* @return array List of calendars
	*/
	public function search_calendars($query, $source)
	{
	if (!kolab_storage::setup())
	return array();

	$this->calendars = array();
	$this->search_more_results = false;

	// find unsubscribed IMAP folders that have "event" type
	if ($source == 'folders') {
	foreach ((array)kolab_storage::search_folders('event', $query, array('other')) as $folder) {
	$calendar = new kolab_calendar($folder->name, $this->cal);
	$this->calendars[$calendar->id] = $calendar;
	}
	}
	// find other user's virtual calendars
	else if ($source == 'users') {
	$limit = $this->rc->config->get('autocomplete_max', 15) * 2; // we have slightly more space, so display twice the number
	foreach (kolab_storage::search_users($query, 0, array(), $limit, $count) as $user) {
	$calendar = new kolab_user_calendar($user, $this->cal);
	$this->calendars[$calendar->id] = $calendar;

	// search for calendar folders shared by this user
	foreach (kolab_storage::list_user_folders($user, 'event', false) as $foldername) {
	$cal = new kolab_calendar($foldername, $this->cal);
	$this->calendars[$cal->id] = $cal;
	$calendar->subscriptions = true;
	}
	}

	if ($count > $limit) {
	$this->search_more_results = true;
	}
	}

	// don't list the birthday calendar
	$this->rc->config->set('calendar_contact_birthdays', false);
	$this->rc->config->set('kolab_invitation_calendars', false);

	return $this->list_calendars();
	}


	/**
	* Fetch a single event
	*
	* @see calendar_driver::get_event()
	* @return array Hash array with event properties, false if not found
	*/
	public function get_event($event, $scope = 0, $full = false)
	{
	if (is_array($event)) {
	$id = $event['id'] ?: $event['uid'];
	$cal = $event['calendar'];

	// we're looking for a recurring instance: expand the ID to our internal convention for recurring instances
	if (!$event['id'] && $event['_instance']) {
	$id .= '-' . $event['_instance'];
	}
	}
	else {
	$id = $event;
	}

	if ($cal) {
	if ($storage = $this->get_calendar($cal)) {
	$result = $storage->get_event($id);
	return self::to_rcube_event($result);
	}
	// get event from the address books birthday calendar
	else if ($cal == self::BIRTHDAY_CALENDAR_ID) {
	return $this->get_birthday_event($id);
	}
	}
	// iterate over all calendar folders and search for the event ID
	else {
	foreach ($this->filter_calendars($scope) as $calendar) {
	if ($result = $calendar->get_event($id)) {
	return self::to_rcube_event($result);
	}
	}
	}

	return false;
	}

	/**
	* Add a single event to the database
	*
	* @see calendar_driver::new_event()
	*/
	public function new_event($event)
	{
	if (!$this->validate($event))
	return false;

	$event = self::from_rcube_event($event);

	$cid = $event['calendar'] ? $event['calendar'] : reset(array_keys($this->calendars));
	if ($storage = $this->get_calendar($cid)) {
	// if this is a recurrence instance, append as exception to an already existing object for this UID
	if (!empty($event['recurrence_date']) && ($master = $storage->get_event($event['uid']))) {
	self::add_exception($master, $event);
	$success = $storage->update_event($master);
	}
	else {
	$success = $storage->insert_event($event);
	}

	if ($success && $this->freebusy_trigger) {
	$this->rc->output->command('plugin.ping_url', array('action' => 'calendar/push-freebusy', 'source' => $storage->id));
	$this->freebusy_trigger = false; // disable after first execution (#2355)
	}

	return $success;
	}

	return false;
	}

	/**
	* Update an event entry with the given data
	*
	* @see calendar_driver::new_event()
	* @return boolean True on success, False on error
	*/
	public function edit_event($event)
	{
	if (!($storage = $this->get_calendar($event['calendar'])))
	return false;

	return $this->update_event(self::from_rcube_event($event, $storage->get_event($event['id'])));
	}

	/**
	* Extended event editing with possible changes to the argument
	*
	* @param array Hash array with event properties
	* @param string New participant status
	* @param array List of hash arrays with updated attendees
	* @return boolean True on success, False on error
	*/
	public function edit_rsvp(&$event, $status, $attendees)
	{
	$update_event = $event;

	// apply changes to master (and all exceptions)
	if ($event['_savemode'] == 'all' && $event['recurrence_id']) {
	if ($storage = $this->get_calendar($event['calendar'])) {
	$update_event = $storage->get_event($event['recurrence_id']);
	$update_event['_savemode'] = $event['_savemode'];
	$update_event['id'] = $update_event['uid'];
	unset($update_event['recurrence_id']);
	calendar::merge_attendee_data($update_event, $attendees);
	}
	}

	if ($ret = $this->update_attendees($update_event, $attendees)) {
	// replace with master event (for iTip reply)
	$event = self::to_rcube_event($update_event);

	// re-assign to the according (virtual) calendar
	if ($this->rc->config->get('kolab_invitation_calendars')) {
	if (strtoupper($status) == 'DECLINED')
	$event['calendar'] = self::INVITATIONS_CALENDAR_DECLINED;
	else if (strtoupper($status) == 'NEEDS-ACTION')
	$event['calendar'] = self::INVITATIONS_CALENDAR_PENDING;
	else if ($event['_folder_id'])
	$event['calendar'] = $event['_folder_id'];
	}
	}

	return $ret;
	}

	/**
	* Update the participant status for the given attendees
	*
	* @see calendar_driver::update_attendees()
	*/
	public function update_attendees(&$event, $attendees)
	{
	// for this-and-future updates, merge the updated attendees onto all exceptions in range
	if (($event['_savemode'] == 'future' && $event['recurrence_id']) \|\| (!empty($event['recurrence']) && !$event['recurrence_id'])) {
	if (!($storage = $this->get_calendar($event['calendar'])))
	return false;

	// load master event
	$master = $event['recurrence_id'] ? $storage->get_event($event['recurrence_id']) : $event;

	// apply attendee update to each existing exception
	if ($master['recurrence'] && !empty($master['recurrence']['EXCEPTIONS'])) {
	$saved = false;
	foreach ($master['recurrence']['EXCEPTIONS'] as $i => $exception) {
	// merge the new event properties onto future exceptions
	if ($exception['_instance'] >= strval($event['_instance'])) {
	calendar::merge_attendee_data($master['recurrence']['EXCEPTIONS'][$i], $attendees);
	}
	// update a specific instance
	if ($exception['_instance'] == $event['_instance'] && $exception['thisandfuture']) {
	$saved = true;
	}
	}

	// add the given event as new exception
	if (!$saved && $event['id'] != $master['id']) {
	$event['thisandfuture'] = true;
	$master['recurrence']['EXCEPTIONS'][] = $event;
	}

	// set link to top-level exceptions
	$master['exceptions'] = &$master['recurrence']['EXCEPTIONS'];

	return $this->update_event($master);
	}
	}

	// just update the given event (instance)
	return $this->update_event($event);
	}

	/**
	* Move a single event
	*
	* @see calendar_driver::move_event()
	* @return boolean True on success, False on error
	*/
	public function move_event($event)
	{
	if (($storage = $this->get_calendar($event['calendar'])) && ($ev = $storage->get_event($event['id']))) {
	unset($ev['sequence']);
	self::clear_attandee_noreply($ev);
	return $this->update_event($event + $ev);
	}

	return false;
	}

	/**
	* Resize a single event
	*
	* @see calendar_driver::resize_event()
	* @return boolean True on success, False on error
	*/
	public function resize_event($event)
	{
	if (($storage = $this->get_calendar($event['calendar'])) && ($ev = $storage->get_event($event['id']))) {
	unset($ev['sequence']);
	self::clear_attandee_noreply($ev);
	return $this->update_event($event + $ev);
	}

	return false;
	}

	/**
	* Remove a single event
	*
	* @param array Hash array with event properties:
	* id: Event identifier
	* @param boolean Remove record(s) irreversible (mark as deleted otherwise)
	*
	* @return boolean True on success, False on error
	*/
	public function remove_event($event, $force = true)
	{
	$ret = true;
	$success = false;
	$savemode = $event['_savemode'];
	$decline = $event['_decline'];

	if (($storage = $this->get_calendar($event['calendar'])) && ($event = $storage->get_event($event['id']))) {
	$event['_savemode'] = $savemode;
	$savemode = 'all';
	$master = $event;

	$this->rc->session->remove('calendar_restore_event_data');

	// read master if deleting a recurring event
	if ($event['recurrence'] \|\| $event['recurrence_id'] \|\| $event['isexception']) {
	$master = $storage->get_event($event['uid']);
	$savemode = $event['_savemode'] ?: ($event['_instance'] \|\| $event['isexception'] ? 'current' : 'all');

	// force 'current' mode for single occurrences stored as exception
	if (!$event['recurrence'] && !$event['recurrence_id'] && $event['isexception'])
	$savemode = 'current';
	}

	// removing an exception instance
	if (($event['recurrence_id'] \|\| $event['isexception']) && is_array($master['exceptions'])) {
	foreach ($master['exceptions'] as $i => $exception) {
	if ($exception['_instance'] == $event['_instance']) {
	unset($master['exceptions'][$i]);
	// set event date back to the actual occurrence
	if ($exception['recurrence_date'])
	$event['start'] = $exception['recurrence_date'];
	}
	}

	if (is_array($master['recurrence'])) {
	$master['recurrence']['EXCEPTIONS'] = &$master['exceptions'];
	}
	}

	switch ($savemode) {
	case 'current':
	$_SESSION['calendar_restore_event_data'] = $master;

	// removing the first instance => just move to next occurence
	if ($master['recurrence'] && $event['_instance'] == libcalendaring::recurrence_instance_identifier($master)) {
	$recurring = reset($storage->get_recurring_events($event, $event['start'], null, $event['id'].'-1'));

	// no future instances found: delete the master event (bug #1677)
	if (!$recurring['start']) {
	$success = $storage->delete_event($master, $force);
	break;
	}

	$master['start'] = $recurring['start'];
	$master['end'] = $recurring['end'];
	if ($master['recurrence']['COUNT'])
	$master['recurrence']['COUNT']--;
	}
	// remove the matching RDATE entry
	else if ($master['recurrence']['RDATE']) {
	foreach ($master['recurrence']['RDATE'] as $j => $rdate) {
	if ($rdate->format('Ymd') == $event['start']->format('Ymd')) {
	unset($master['recurrence']['RDATE'][$j]);
	break;
	}
	}
	}
	else { // add exception to master event
	$master['recurrence']['EXDATE'][] = $event['start'];
	}
	$success = $storage->update_event($master);
	break;

	case 'future':
	$master['_instance'] = libcalendaring::recurrence_instance_identifier($master);
	if ($master['_instance'] != $event['_instance']) {
	$_SESSION['calendar_restore_event_data'] = $master;

	// set until-date on master event
	$master['recurrence']['UNTIL'] = clone $event['start'];
	$master['recurrence']['UNTIL']->sub(new DateInterval('P1D'));
	unset($master['recurrence']['COUNT']);

	// if all future instances are deleted, remove recurrence rule entirely (bug #1677)
	if ($master['recurrence']['UNTIL']->format('Ymd') == $master['start']->format('Ymd')) {
	$master['recurrence'] = array();
	}
	// remove matching RDATE entries
	else if ($master['recurrence']['RDATE']) {
	foreach ($master['recurrence']['RDATE'] as $j => $rdate) {
	if ($rdate->format('Ymd') == $event['start']->format('Ymd')) {
	$master['recurrence']['RDATE'] = array_slice($master['recurrence']['RDATE'], 0, $j);
	break;
	}
	}
	}

	$success = $storage->update_event($master);
	$ret = $master['uid'];
	break;
	}

	default: // 'all' is default
	// removing the master event with loose exceptions (not recurring though)
	if (!empty($event['recurrence_date']) && empty($master['recurrence']) && !empty($master['exceptions'])) {
	// make the first exception the new master
	$newmaster = array_shift($master['exceptions']);
	$newmaster['exceptions'] = $master['exceptions'];
	$newmaster['_attachments'] = $master['_attachments'];
	$newmaster['_mailbox'] = $master['_mailbox'];
	$newmaster['_msguid'] = $master['_msguid'];

	$success = $storage->update_event($newmaster);
	}
	else if ($decline && $this->rc->config->get('kolab_invitation_calendars')) {
	// don't delete but set PARTSTAT=DECLINED
	if ($this->cal->lib->set_partstat($master, 'DECLINED')) {
	$success = $storage->update_event($master);
	}
	}

	if (!$success)
	$success = $storage->delete_event($master, $force);
	break;
	}
	}

	if ($success && $this->freebusy_trigger)
	$this->rc->output->command('plugin.ping_url', array('action' => 'calendar/push-freebusy', 'source' => $storage->id));

	return $success ? $ret : false;
	}

	/**
	* Restore a single deleted event
	*
	* @param array Hash array with event properties:
	* id: Event identifier
	* @return boolean True on success, False on error
	*/
	public function restore_event($event)
	{
	if ($storage = $this->get_calendar($event['calendar'])) {
	if (!empty($_SESSION['calendar_restore_event_data']))
	$success = $storage->update_event($_SESSION['calendar_restore_event_data']);
	else
	$success = $storage->restore_event($event);

	if ($success && $this->freebusy_trigger)
	$this->rc->output->command('plugin.ping_url', array('action' => 'calendar/push-freebusy', 'source' => $storage->id));

	return $success;
	}

	return false;
	}

	/**
	* Wrapper to update an event object depending on the given savemode
	*/
	private function update_event($event)
	{
	if (!($storage = $this->get_calendar($event['calendar'])))
	return false;

	// move event to another folder/calendar
	if ($event['_fromcalendar'] && $event['_fromcalendar'] != $event['calendar']) {
	if (!($fromcalendar = $this->get_calendar($event['_fromcalendar'])))
	return false;

	$old = $fromcalendar->get_event($event['id']);

	if ($event['_savemode'] != 'new') {
	if (!$fromcalendar->storage->move($old['uid'], $storage->storage)) {
	return false;
	}

	$fromcalendar = $storage;
	}
	}
	else
	$fromcalendar = $storage;

	$success = false;
	$savemode = 'all';
	$attachments = array();
	$old = $master = $storage->get_event($event['id']);

	if (!$old \|\| !$old['start']) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Failed to load event object to update: id=" . $event['id']),
	true, false);
	return false;
	}

	// modify a recurring event, check submitted savemode to do the right things
	if ($old['recurrence'] \|\| $old['recurrence_id'] \|\| $old['isexception']) {
	$master = $storage->get_event($old['uid']);
	$savemode = $event['_savemode'] ?: ($old['recurrence_id'] \|\| $old['isexception'] ? 'current' : 'all');

	// this-and-future on the first instance equals to 'all'
	if ($savemode == 'future' && $master['start'] && $old['_instance'] == libcalendaring::recurrence_instance_identifier($master))
	$savemode = 'all';
	// force 'current' mode for single occurrences stored as exception
	else if (!$old['recurrence'] && !$old['recurrence_id'] && $old['isexception'])
	$savemode = 'current';
	}

	// check if update affects scheduling and update attendee status accordingly
	$reschedule = $this->check_scheduling($event, $old, true);

	// keep saved exceptions (not submitted by the client)
	if ($old['recurrence']['EXDATE'] && !isset($event['recurrence']['EXDATE']))
	$event['recurrence']['EXDATE'] = $old['recurrence']['EXDATE'];
	if (isset($event['recurrence']['EXCEPTIONS']))
	$with_exceptions = true; // exceptions already provided (e.g. from iCal import)
	else if ($old['recurrence']['EXCEPTIONS'])
	$event['recurrence']['EXCEPTIONS'] = $old['recurrence']['EXCEPTIONS'];
	else if ($old['exceptions'])
	$event['exceptions'] = $old['exceptions'];

	// remove some internal properties which should not be saved
	unset($event['_savemode'], $event['_fromcalendar'], $event['_identity'], $event['_owner'],
	$event['_notify'], $event['_method'], $event['_sender'], $event['_sender_utf'], $event['_size']);

	switch ($savemode) {
	case 'new':
	// save submitted data as new (non-recurring) event
	$event['recurrence'] = array();
	$event['_copyfrom'] = $master['_msguid'];
	$event['_mailbox'] = $master['_mailbox'];
	$event['uid'] = $this->cal->generate_uid();
	unset($event['recurrence_id'], $event['recurrence_date'], $event['_instance'], $event['id']);

	// copy attachment metadata to new event
	$event = self::from_rcube_event($event, $master);

	self::clear_attandee_noreply($event);
	if ($success = $storage->insert_event($event))
	$success = $event['uid'];
	break;

	case 'future':
	// create a new recurring event
	$event['_copyfrom'] = $master['_msguid'];
	$event['_mailbox'] = $master['_mailbox'];
	$event['uid'] = $this->cal->generate_uid();
	unset($event['recurrence_id'], $event['recurrence_date'], $event['_instance'], $event['id']);

	// copy attachment metadata to new event
	$event = self::from_rcube_event($event, $master);

	// remove recurrence exceptions on re-scheduling
	if ($reschedule) {
	unset($event['recurrence']['EXCEPTIONS'], $event['exceptions'], $master['recurrence']['EXDATE']);
	}
	else if (is_array($event['recurrence']['EXCEPTIONS'])) {
	// only keep relevant exceptions
	$event['recurrence']['EXCEPTIONS'] = array_filter($event['recurrence']['EXCEPTIONS'], function($exception) use ($event) {
	return $exception['start'] > $event['start'];
	});
	if (is_array($event['recurrence']['EXDATE'])) {
	$event['recurrence']['EXDATE'] = array_filter($event['recurrence']['EXDATE'], function($exdate) use ($event) {
	return $exdate > $event['start'];
	});
	}
	// set link to top-level exceptions
	$event['exceptions'] = &$event['recurrence']['EXCEPTIONS'];
	}

	// compute remaining occurrences
	if ($event['recurrence']['COUNT']) {
	if (!$old['_count'])
	$old['_count'] = $this->get_recurrence_count($master, $old['start']);
	$event['recurrence']['COUNT'] -= intval($old['_count']);
	}

	// remove fixed weekday when date changed
	if ($old['start']->format('Y-m-d') != $event['start']->format('Y-m-d')) {
	if (strlen($event['recurrence']['BYDAY']) == 2)
	unset($event['recurrence']['BYDAY']);
	if ($old['recurrence']['BYMONTH'] == $old['start']->format('n'))
	unset($event['recurrence']['BYMONTH']);
	}

	// set until-date on master event
	$master['recurrence']['UNTIL'] = clone $old['start'];
	$master['recurrence']['UNTIL']->sub(new DateInterval('P1D'));
	unset($master['recurrence']['COUNT']);

	// remove all exceptions after $event['start']
	if (is_array($master['recurrence']['EXCEPTIONS'])) {
	$master['recurrence']['EXCEPTIONS'] = array_filter($master['recurrence']['EXCEPTIONS'], function($exception) use ($event) {
	return $exception['start'] < $event['start'];
	});
	// set link to top-level exceptions
	$master['exceptions'] = &$master['recurrence']['EXCEPTIONS'];
	}
	if (is_array($master['recurrence']['EXDATE'])) {
	$master['recurrence']['EXDATE'] = array_filter($master['recurrence']['EXDATE'], function($exdate) use ($event) {
	return $exdate < $event['start'];
	});
	}

	// save new event
	if ($success = $storage->insert_event($event)) {
	$success = $event['uid'];

	// update master event (no rescheduling!)
	self::clear_attandee_noreply($master);
	$storage->update_event($master);
	}
	break;

	case 'current':
	// recurring instances shall not store recurrence rules and attachments
	$event['recurrence'] = array();
	$event['thisandfuture'] = $savemode == 'future';
	unset($event['attachments'], $event['id']);

	// increment sequence of this instance if scheduling is affected
	if ($reschedule) {
	$event['sequence'] = max($old['sequence'], $master['sequence']) + 1;
	}
	else if (!isset($event['sequence'])) {
	$event['sequence'] = $old['sequence'] ?: $master['sequence'];
	}

	// save properties to a recurrence exception instance
	if ($old['_instance'] && is_array($master['recurrence']['EXCEPTIONS'])) {
	if ($this->update_recurrence_exceptions($master, $event, $old, $savemode)) {
	$success = $storage->update_event($master, $old['id']);
	break;
	}
	}

	$add_exception = true;

	// adjust matching RDATE entry if dates changed
	if (is_array($master['recurrence']['RDATE']) && ($old_date = $old['start']->format('Ymd')) != $event['start']->format('Ymd')) {
	foreach ($master['recurrence']['RDATE'] as $j => $rdate) {
	if ($rdate->format('Ymd') == $old_date) {
	$master['recurrence']['RDATE'][$j] = $event['start'];
	sort($master['recurrence']['RDATE']);
	$add_exception = false;
	break;
	}
	}
	}

	// save as new exception to master event
	if ($add_exception) {
	self::add_exception($master, $event, $old);
	}

	$success = $storage->update_event($master);
	break;

	default: // 'all' is default
	$event['id'] = $master['uid'];
	$event['uid'] = $master['uid'];

	// use start date from master but try to be smart on time or duration changes
	$old_start_date = $old['start']->format('Y-m-d');
	$old_start_time = $old['allday'] ? '' : $old['start']->format('H:i');
	$old_duration = $old['end']->format('U') - $old['start']->format('U');

	$new_start_date = $event['start']->format('Y-m-d');
	$new_start_time = $event['allday'] ? '' : $event['start']->format('H:i');
	$new_duration = $event['end']->format('U') - $event['start']->format('U');

	$diff = $old_start_date != $new_start_date \|\| $old_start_time != $new_start_time \|\| $old_duration != $new_duration;
	$date_shift = $old['start']->diff($event['start']);

	// shifted or resized
	if ($diff && ($old_start_date == $new_start_date \|\| $old_duration == $new_duration)) {
	$event['start'] = $master['start']->add($date_shift);
	$event['end'] = clone $event['start'];
	$event['end']->add(new DateInterval('PT'.$new_duration.'S'));

	// remove fixed weekday, will be re-set to the new weekday in kolab_calendar::update_event()
	if ($old_start_date != $new_start_date) {
	if (strlen($event['recurrence']['BYDAY']) == 2)
	unset($event['recurrence']['BYDAY']);
	if ($old['recurrence']['BYMONTH'] == $old['start']->format('n'))
	unset($event['recurrence']['BYMONTH']);
	}
	}
	// dates did not change, use the ones from master
	else if ($new_start_date . $new_start_time == $old_start_date . $old_start_time) {
	$event['start'] = $master['start'];
	$event['end'] = $master['end'];
	}

	// when saving an instance in 'all' mode, copy recurrence exceptions over
	if ($old['recurrence_id']) {
	$event['recurrence']['EXCEPTIONS'] = $master['recurrence']['EXCEPTIONS'];
	}
	else if ($master['_instance']) {
	$event['_instance'] = $master['_instance'];
	$event['recurrence_date'] = $master['recurrence_date'];
	}

	// TODO: forward changes to exceptions (which do not yet have differing values stored)
	if (is_array($event['recurrence']) && is_array($event['recurrence']['EXCEPTIONS']) && !$with_exceptions) {
	// determine added and removed attendees
	$old_attendees = $current_attendees = $added_attendees = array();
	foreach ((array)$old['attendees'] as $attendee) {
	$old_attendees[] = $attendee['email'];
	}
	foreach ((array)$event['attendees'] as $attendee) {
	$current_attendees[] = $attendee['email'];
	if (!in_array($attendee['email'], $old_attendees)) {
	$added_attendees[] = $attendee;
	}
	}
	$removed_attendees = array_diff($old_attendees, $current_attendees);

	foreach ($event['recurrence']['EXCEPTIONS'] as $i => $exception) {
	calendar::merge_attendee_data($event['recurrence']['EXCEPTIONS'][$i], $added_attendees, $removed_attendees);
	}

	// adjust recurrence-id when start changed and therefore the entire recurrence chain changes
	if ($old_start_date != $new_start_date \|\| $old_start_time != $new_start_time) {
	$recurrence_id_format = libcalendaring::recurrence_id_format($event);
	foreach ($event['recurrence']['EXCEPTIONS'] as $i => $exception) {
	$recurrence_id = is_a($exception['recurrence_date'], 'DateTime') ? $exception['recurrence_date'] :
	rcube_utils::anytodatetime($exception['_instance'], $old['start']->getTimezone());
	if (is_a($recurrence_id, 'DateTime')) {
	$recurrence_id->add($date_shift);
	$event['recurrence']['EXCEPTIONS'][$i]['recurrence_date'] = $recurrence_id;
	$event['recurrence']['EXCEPTIONS'][$i]['_instance'] = $recurrence_id->format($recurrence_id_format);
	}
	}
	}

	// set link to top-level exceptions
	$event['exceptions'] = &$event['recurrence']['EXCEPTIONS'];
	}

	// unset _dateonly flags in (cached) date objects
	unset($event['start']->_dateonly, $event['end']->_dateonly);

	$success = $storage->update_event($event) ? $event['id'] : false; // return master UID
	break;
	}

	if ($success && $this->freebusy_trigger)
	$this->rc->output->command('plugin.ping_url', array('action' => 'calendar/push-freebusy', 'source' => $storage->id));

	return $success;
	}

	/**
	* Determine whether the current change affects scheduling and reset attendee status accordingly
	*/
	public function check_scheduling(&$event, $old, $update = true)
	{
	// skip this check when importing iCal/iTip events
	if (isset($event['sequence']) \|\| !empty($event['_method'])) {
	return false;
	}

	// iterate through the list of properties considered 'significant' for scheduling
	$kolab_event = $old['_formatobj'] ?: new kolab_format_event();
	$reschedule = $kolab_event->check_rescheduling($event, $old);

	// reset all attendee status to needs-action (#4360)
	if ($update && $reschedule && is_array($event['attendees'])) {
	$is_organizer = false;
	$emails = $this->cal->get_user_emails();
	$attendees = $event['attendees'];
	foreach ($attendees as $i => $attendee) {
	if ($attendee['role'] == 'ORGANIZER' && $attendee['email'] && in_array(strtolower($attendee['email']), $emails)) {
	$is_organizer = true;
	}
	else if ($attendee['role'] != 'ORGANIZER' && $attendee['role'] != 'NON-PARTICIPANT' && $attendee['status'] != 'DELEGATED') {
	$attendees[$i]['status'] = 'NEEDS-ACTION';
	$attendees[$i]['rsvp'] = true;
	}
	}

	// update attendees only if I'm the organizer
	if ($is_organizer \|\| ($event['organizer'] && in_array(strtolower($event['organizer']['email']), $emails))) {
	$event['attendees'] = $attendees;
	}
	}

	return $reschedule;
	}

	/**
	* Apply the given changes to already existing exceptions
	*/
	protected function update_recurrence_exceptions(&$master, $event, $old, $savemode)
	{
	$saved = false;
	$existing = null;

	// determine added and removed attendees
	$added_attendees = $removed_attendees = array();
	if ($savemode == 'future') {
	$old_attendees = $current_attendees = array();
	foreach ((array)$old['attendees'] as $attendee) {
	$old_attendees[] = $attendee['email'];
	}
	foreach ((array)$event['attendees'] as $attendee) {
	$current_attendees[] = $attendee['email'];
	if (!in_array($attendee['email'], $old_attendees)) {
	$added_attendees[] = $attendee;
	}
	}
	$removed_attendees = array_diff($old_attendees, $current_attendees);
	}

	foreach ($master['recurrence']['EXCEPTIONS'] as $i => $exception) {
	// update a specific instance
	if ($exception['_instance'] == $old['_instance']) {
	$existing = $i;

	// check savemode against existing exception mode.
	// if matches, we can update this existing exception
	if ((bool)$exception['thisandfuture'] === ($savemode == 'future')) {
	$event['_instance'] = $old['_instance'];
	$event['thisandfuture'] = $old['thisandfuture'];
	$event['recurrence_date'] = $old['recurrence_date'];
	$master['recurrence']['EXCEPTIONS'][$i] = $event;
	$saved = true;
	}
	}
	// merge the new event properties onto future exceptions
	if ($savemode == 'future' && $exception['_instance'] >= $old['_instance']) {
	unset($event['thisandfuture']);
	self::merge_exception_data($master['recurrence']['EXCEPTIONS'][$i], $event, array('attendees'));

	if (!empty($added_attendees) \|\| !empty($removed_attendees)) {
	calendar::merge_attendee_data($master['recurrence']['EXCEPTIONS'][$i], $added_attendees, $removed_attendees);
	}
	}
	}
	/*
	// we could not update the existing exception due to savemode mismatch...
	if (!$saved && $existing !== null && $master['recurrence']['EXCEPTIONS'][$existing]['thisandfuture']) {
	// ... try to move the existing this-and-future exception to the next occurrence
	foreach ($this->get_recurring_events($master, $existing['start']) as $candidate) {
	// our old this-and-future exception is obsolete
	if ($candidate['thisandfuture']) {
	unset($master['recurrence']['EXCEPTIONS'][$existing]);
	$saved = true;
	break;
	}
	// this occurrence doesn't yet have an exception
	else if (!$candidate['isexception']) {
	$event['_instance'] = $candidate['_instance'];
	$event['recurrence_date'] = $candidate['recurrence_date'];
	$master['recurrence']['EXCEPTIONS'][$i] = $event;
	$saved = true;
	break;
	}
	}
	}
	*/

	// set link to top-level exceptions
	$master['exceptions'] = &$master['recurrence']['EXCEPTIONS'];

	// returning false here will add a new exception
	return $saved;
	}

	/**
	* Add or update the given event as an exception to $master
	*/
	public static function add_exception(&$master, $event, $old = null)
	{
	if ($old) {
	$event['_instance'] = $old['_instance'];
	if (!$event['recurrence_date'])
	$event['recurrence_date'] = $old['recurrence_date'] ?: $old['start'];
	}
	else if (!$event['recurrence_date']) {
	$event['recurrence_date'] = $event['start'];
	}

	if (!$event['_instance'] && is_a($event['recurrence_date'], 'DateTime')) {
	$event['_instance'] = libcalendaring::recurrence_instance_identifier($event);
	}

	if (!is_array($master['exceptions']) && is_array($master['recurrence']['EXCEPTIONS'])) {
	$master['exceptions'] = &$master['recurrence']['EXCEPTIONS'];
	}

	$existing = false;
	foreach ((array)$master['exceptions'] as $i => $exception) {
	if ($exception['_instance'] == $event['_instance']) {
	$master['exceptions'][$i] = $event;
	$existing = true;
	}
	}

	if (!$existing) {
	$master['exceptions'][] = $event;
	}

	return true;
	}

	/**
	* Remove the noreply flags from attendees
	*/
	public static function clear_attandee_noreply(&$event)
	{
	foreach ((array)$event['attendees'] as $i => $attendee) {
	unset($event['attendees'][$i]['noreply']);
	}
	}


	/**
	* Merge certain properties from the overlay event to the base event object
	*
	* @param array The event object to be altered
	* @param array The overlay event object to be merged over $event
	* @param array List of properties not allowed to be overwritten
	*/
	public static function merge_exception_data(&$event, $overlay, $blacklist = null)
	{
	$forbidden = array('id','uid','recurrence','recurrence_date','thisandfuture','organizer','_attachments');

	if (is_array($blacklist))
	$forbidden = array_merge($forbidden, $blacklist);

	// compute date offset from the exception
	if ($overlay['start'] instanceof DateTime && $overlay['recurrence_date'] instanceof DateTime) {
	$date_offset = $overlay['recurrence_date']->diff($overlay['start']);
	}

	foreach ($overlay as $prop => $value) {
	if ($prop == 'start' \|\| $prop == 'end') {
	if (is_object($event[$prop]) && $event[$prop] instanceof DateTime) {
	// set date value if overlay is an exception of the current instance
	if (substr($overlay['_instance'], 0, 8) == substr($event['_instance'], 0, 8)) {
	$event[$prop]->setDate(intval($value->format('Y')), intval($value->format('n')), intval($value->format('j')));
	}
	// apply date offset
	else if ($date_offset) {
	$event[$prop]->add($date_offset);
	}
	// adjust time of the recurring event instance
	$event[$prop]->setTime($value->format('G'), intval($value->format('i')), intval($value->format('s')));
	}
	}
	else if ($prop == 'thisandfuture' && $overlay['_instance'] == $event['_instance']) {
	$event[$prop] = $value;
	}
	else if ($prop[0] != '_' && !in_array($prop, $forbidden))
	$event[$prop] = $value;
	}
	}

	/**
	* Get events from source.
	*
	* @param integer Event's new start (unix timestamp)
	* @param integer Event's new end (unix timestamp)
	* @param string Search query (optional)
	* @param mixed List of calendar IDs to load events from (either as array or comma-separated string)
	* @param boolean Include virtual events (optional)
	* @param integer Only list events modified since this time (unix timestamp)
	* @return array A list of event records
	*/
	public function load_events($start, $end, $search = null, $calendars = null, $virtual = 1, $modifiedsince = null)
	{
	if ($calendars && is_string($calendars))
	$calendars = explode(',', $calendars);
	else if (!$calendars)
	$calendars = array_keys($this->calendars);

	$query = array();
	if ($modifiedsince)
	$query[] = array('changed', '>=', $modifiedsince);

	$events = $categories = array();
	foreach ($calendars as $cid) {
	if ($storage = $this->get_calendar($cid)) {
	$events = array_merge($events, $storage->list_events($start, $end, $search, $virtual, $query));
	$categories += $storage->categories;
	}
	}

	// add events from the address books birthday calendar
	if (in_array(self::BIRTHDAY_CALENDAR_ID, $calendars)) {
	$events = array_merge($events, $this->load_birthday_events($start, $end, $search, $modifiedsince));
	}

	// add new categories to user prefs
	$old_categories = $this->rc->config->get('calendar_categories', $this->default_categories);
	if ($newcats = array_udiff(array_keys($categories), array_keys($old_categories), function($a, $b){ return strcasecmp($a, $b); })) {
	foreach ($newcats as $category)
	$old_categories[$category] = ''; // no color set yet
	$this->rc->user->save_prefs(array('calendar_categories' => $old_categories));
	}

	array_walk($events, 'kolab_driver::to_rcube_event');
	return $events;
	}

	/**
	* Get number of events in the given calendar
	*
	* @param mixed List of calendar IDs to count events (either as array or comma-separated string)
	* @param integer Date range start (unix timestamp)
	* @param integer Date range end (unix timestamp)
	* @return array Hash array with counts grouped by calendar ID
	*/
	public function count_events($calendars, $start, $end = null)
	{
	$counts = array();

	if ($calendars && is_string($calendars))
	$calendars = explode(',', $calendars);
	else if (!$calendars)
	$calendars = array_keys($this->calendars);

	foreach ($calendars as $cid) {
	if ($storage = $this->get_calendar($cid)) {
	$counts[$cid] = $storage->count_events($start, $end);
	}
	}

	return $counts;
	}

	/**
	* Get a list of pending alarms to be displayed to the user
	*
	* @see calendar_driver::pending_alarms()
	*/
	public function pending_alarms($time, $calendars = null)
	{
	$interval = 300;
	$time -= $time % 60;

	$slot = $time;
	$slot -= $slot % $interval;

	$last = $time - max(60, $this->rc->config->get('refresh_interval', 0));
	$last -= $last % $interval;

	// only check for alerts once in 5 minutes
	if ($last == $slot)
	return array();

	if ($calendars && is_string($calendars))
	$calendars = explode(',', $calendars);

	$time = $slot + $interval;

	$candidates = array();
	$query = array(array('tags', '=', 'x-has-alarms'));
	foreach ($this->calendars as $cid => $calendar) {
	// skip calendars with alarms disabled
	if (!$calendar->alarms \|\| ($calendars && !in_array($cid, $calendars)))
	continue;

	foreach ($calendar->list_events($time, $time + 86400 * 365, null, 1, $query) as $e) {
	// add to list if alarm is set
	$alarm = libcalendaring::get_next_alarm($e);
	if ($alarm && $alarm['time'] && $alarm['time'] >= $last && in_array($alarm['action'], $this->alarm_types)) {
	$id = $alarm['id']; // use alarm-id as primary identifier
	$candidates[$id] = array(
	'id' => $id,
	'title' => $e['title'],
	'location' => $e['location'],
	'start' => $e['start'],
	'end' => $e['end'],
	'notifyat' => $alarm['time'],
	'action' => $alarm['action'],
	);
	}
	}
	}

	// get alarm information stored in local database
	if (!empty($candidates)) {
	$alarm_ids = array_map(array($this->rc->db, 'quote'), array_keys($candidates));
	$result = $this->rc->db->query("SELECT *"
	. " FROM " . $this->rc->db->table_name('kolab_alarms', true)
	. " WHERE `alarm_id` IN (" . join(',', $alarm_ids) . ")"
	. " AND `user_id` = ?",
	$this->rc->user->ID
	);

	while ($result && ($e = $this->rc->db->fetch_assoc($result))) {
	$dbdata[$e['alarm_id']] = $e;
	}
	}

	$alarms = array();
	foreach ($candidates as $id => $alarm) {
	// skip dismissed alarms
	if ($dbdata[$id]['dismissed'])
	continue;

	// snooze function may have shifted alarm time
	$notifyat = $dbdata[$id]['notifyat'] ? strtotime($dbdata[$id]['notifyat']) : $alarm['notifyat'];
	if ($notifyat <= $time)
	$alarms[] = $alarm;
	}

	return $alarms;
	}

	/**
	* Feedback after showing/sending an alarm notification
	*
	* @see calendar_driver::dismiss_alarm()
	*/
	public function dismiss_alarm($alarm_id, $snooze = 0)
	{
	$alarms_table = $this->rc->db->table_name('kolab_alarms', true);
	// delete old alarm entry
	$this->rc->db->query("DELETE FROM $alarms_table"
	. " WHERE `alarm_id` = ? AND `user_id` = ?",
	$alarm_id,
	$this->rc->user->ID
	);

	// set new notifyat time or unset if not snoozed
	$notifyat = $snooze > 0 ? date('Y-m-d H:i:s', time() + $snooze) : null;

	$query = $this->rc->db->query("INSERT INTO $alarms_table"
	. " (`alarm_id`, `user_id`, `dismissed`, `notifyat`)"
	. " VALUES (?, ?, ?, ?)",
	$alarm_id,
	$this->rc->user->ID,
	$snooze > 0 ? 0 : 1,
	$notifyat
	);

	return $this->rc->db->affected_rows($query);
	}

	/**
	* List attachments from the given event
	*/
	public function list_attachments($event)
	{
	if (!($storage = $this->get_calendar($event['calendar'])))
	return false;

	$event = $storage->get_event($event['id']);

	return $event['attachments'];
	}

	/**
	* Get attachment properties
	*/
	public function get_attachment($id, $event)
	{
	if (!($storage = $this->get_calendar($event['calendar'])))
	return false;

	// get old revision of event
	if ($event['rev']) {
	$event = $this->get_event_revison($event, $event['rev'], true);
	}
	else {
	$event = $storage->get_event($event['id']);
	}

	if ($event && !empty($event['_attachments'])) {
	foreach ($event['_attachments'] as $att) {
	if ($att['id'] == $id) {
	return $att;
	}
	}
	}

	return null;
	}

	/**
	* Get attachment body
	* @see calendar_driver::get_attachment_body()
	*/
	public function get_attachment_body($id, $event)
	{
	if (!($cal = $this->get_calendar($event['calendar'])))
	return false;

	// get old revision of event
	if ($event['rev']) {
	if (empty($this->bonnie_api)) {
	return false;
	}

	$cid = substr($id, 4);

	// call Bonnie API and get the raw mime message
	list($uid, $mailbox, $msguid) = $this->_resolve_event_identity($event);
	if ($msg_raw = $this->bonnie_api->rawdata('event', $uid, $event['rev'], $mailbox, $msguid)) {
	// parse the message and find the part with the matching content-id
	$message = rcube_mime::parse_message($msg_raw);
	foreach ((array)$message->parts as $part) {
	if ($part->headers['content-id'] && trim($part->headers['content-id'], '<>') == $cid) {
	return $part->body;
	}
	}
	}

	return false;
	}

	return $cal->get_attachment_body($id, $event);
	}

	/**
	* Build a struct representing the given message reference
	*
	* @see calendar_driver::get_message_reference()
	*/
	public function get_message_reference($uri_or_headers, $folder = null)
	{
	if (is_object($uri_or_headers)) {
	$uri_or_headers = kolab_storage_config::get_message_uri($uri_or_headers, $folder);
	}

	if (is_string($uri_or_headers)) {
	return kolab_storage_config::get_message_reference($uri_or_headers, 'event');
	}

	return false;
	}

	/**
	* List availabale categories
	* The default implementation reads them from config/user prefs
	*/
	public function list_categories()
	{
	// FIXME: complete list with categories saved in config objects (KEP:12)
	return $this->rc->config->get('calendar_categories', $this->default_categories);
	}

	/**
	* Create instances of a recurring event
	*
	* @param array Hash array with event properties
	* @param object DateTime Start date of the recurrence window
	* @param object DateTime End date of the recurrence window
	* @return array List of recurring event instances
	*/
	public function get_recurring_events($event, $start, $end = null)
	{
	// load the given event data into a libkolabxml container
	if (!$event['_formatobj']) {
	$event_xml = new kolab_format_event();
	$event_xml->set($event);
	$event['_formatobj'] = $event_xml;
	}

	$this->_read_calendars();
	$storage = reset($this->calendars);
	return $storage->get_recurring_events($event, $start, $end);
	}

	/**
	*
	*/
	private function get_recurrence_count($event, $dtstart)
	{
	// use libkolab to compute recurring events
	if (class_exists('kolabcalendaring') && $event['_formatobj']) {
	$recurrence = new kolab_date_recurrence($event['_formatobj']);
	}
	else {
	// fallback to local recurrence implementation
	require_once($this->cal->home . '/lib/calendar_recurrence.php');
	$recurrence = new calendar_recurrence($this->cal, $event);
	}

	$count = 0;
	while (($next_event = $recurrence->next_instance()) && $next_event['start'] <= $dtstart && $count < 1000) {
	$count++;
	}

	return $count;
	}

	/**
	* Fetch free/busy information from a person within the given range
	*/
	public function get_freebusy_list($email, $start, $end)
	{
	if (empty($email)/* \|\| $end < time()*/)
	return false;

	// map vcalendar fbtypes to internal values
	$fbtypemap = array(
	'FREE' => calendar::FREEBUSY_FREE,
	'BUSY-TENTATIVE' => calendar::FREEBUSY_TENTATIVE,
	'X-OUT-OF-OFFICE' => calendar::FREEBUSY_OOF,
	'OOF' => calendar::FREEBUSY_OOF);

	// ask kolab server first
	try {
	$request_config = array(
	'store_body' => true,
	'follow_redirects' => true,
	);
	$request = libkolab::http_request(kolab_storage::get_freebusy_url($email), 'GET', $request_config);
	$response = $request->send();

	// authentication required
	if ($response->getStatus() == 401) {
	$request->setAuth($this->rc->user->get_username(), $this->rc->decrypt($_SESSION['password']));
	$response = $request->send();
	}

	if ($response->getStatus() == 200)
	$fbdata = $response->getBody();

	unset($request, $response);
	}
	catch (Exception $e) {
	PEAR::raiseError("Error fetching free/busy information: " . $e->getMessage());
	}

	// get free-busy url from contacts
	if (!$fbdata) {
	$fburl = null;
	foreach ((array)$this->rc->config->get('autocomplete_addressbooks', 'sql') as $book) {
	$abook = $this->rc->get_address_book($book);

	if ($result = $abook->search(array('email'), $email, true, true, true/, 'freebusyurl'/)) {
	while ($contact = $result->iterate()) {
	if ($fburl = $contact['freebusyurl']) {
	$fbdata = @file_get_contents($fburl);
	break;
	}
	}
	}

	if ($fbdata)
	break;
	}
	}

	// parse free-busy information using Horde classes
	if ($fbdata) {
	$ical = $this->cal->get_ical();
	$ical->import($fbdata);
	if ($fb = $ical->freebusy) {
	$result = array();
	foreach ($fb['periods'] as $tuple) {
	list($from, $to, $type) = $tuple;
	$result[] = array($from->format('U'), $to->format('U'), isset($fbtypemap[$type]) ? $fbtypemap[$type] : calendar::FREEBUSY_BUSY);
	}

	// we take 'dummy' free-busy lists as "unknown"
	if (empty($result) && !empty($fb['comment']) && stripos($fb['comment'], 'dummy'))
	return false;

	// set period from $start till the begin of the free-busy information as 'unknown'
	if ($fb['start'] && ($fbstart = $fb['start']->format('U')) && $start < $fbstart) {
	array_unshift($result, array($start, $fbstart, calendar::FREEBUSY_UNKNOWN));
	}
	// pad period till $end with status 'unknown'
	if ($fb['end'] && ($fbend = $fb['end']->format('U')) && $fbend < $end) {
	$result[] = array($fbend, $end, calendar::FREEBUSY_UNKNOWN);
	}

	return $result;
	}
	}

	return false;
	}

	/**
	* Handler to push folder triggers when sent from client.
	* Used to push free-busy changes asynchronously after updating an event
	*/
	public function push_freebusy()
	{
	// make shure triggering completes
	set_time_limit(0);
	ignore_user_abort(true);

	$cal = rcube_utils::get_input_value('source', rcube_utils::INPUT_GPC);
	if (!($cal = $this->get_calendar($cal)))
	return false;

	// trigger updates on folder
	$trigger = $cal->storage->trigger();
	if (is_object($trigger) && is_a($trigger, 'PEAR_Error')) {
	rcube::raise_error(array(
	'code' => 900, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Failed triggering folder. Error was " . $trigger->getMessage()),
	true, false);
	}

	exit;
	}


	/**
	* Convert from driver format to external caledar app data
	*/
	public static function to_rcube_event(&$record)
	{
	if (!is_array($record))
	return $record;

	$record['id'] = $record['uid'];

	if ($record['_instance']) {
	$record['id'] .= '-' . $record['_instance'];

	if (!$record['recurrence_id'] && !empty($record['recurrence']))
	$record['recurrence_id'] = $record['uid'];
	}

	// all-day events go from 12:00 - 13:00
	if (is_a($record['start'], 'DateTime') && $record['end'] <= $record['start'] && $record['allday']) {
	$record['end'] = clone $record['start'];
	$record['end']->add(new DateInterval('PT1H'));
	}

	// translate internal '_attachments' to external 'attachments' list
	if (!empty($record['_attachments'])) {
	foreach ($record['_attachments'] as $key => $attachment) {
	if ($attachment !== false) {
	if (!$attachment['name'])
	$attachment['name'] = $key;

	unset($attachment['path'], $attachment['content']);
	$attachments[] = $attachment;
	}
	}

	$record['attachments'] = $attachments;
	}

	if (!empty($record['attendees'])) {
	foreach ((array)$record['attendees'] as $i => $attendee) {
	if (is_array($attendee['delegated-from'])) {
	$record['attendees'][$i]['delegated-from'] = join(', ', $attendee['delegated-from']);
	}
	if (is_array($attendee['delegated-to'])) {
	$record['attendees'][$i]['delegated-to'] = join(', ', $attendee['delegated-to']);
	}
	}
	}

	// Roundcube only supports one category assignment
	if (is_array($record['categories']))
	$record['categories'] = $record['categories'][0];

	// the cancelled flag transltes into status=CANCELLED
	if ($record['cancelled'])
	$record['status'] = 'CANCELLED';

	// The web client only supports DISPLAY type of alarms
	if (!empty($record['alarms']))
	$record['alarms'] = preg_replace('/:[A-Z]+$/', ':DISPLAY', $record['alarms']);

	// remove empty recurrence array
	if (empty($record['recurrence']))
	unset($record['recurrence']);

	// clean up exception data
	if (is_array($record['recurrence']['EXCEPTIONS'])) {
	array_walk($record['recurrence']['EXCEPTIONS'], function(&$exception) {
	unset($exception['_mailbox'], $exception['_msguid'], $exception['_formatobj'], $exception['_attachments']);
	});
	}

	unset($record['_mailbox'], $record['_msguid'], $record['_type'], $record['_size'],
	$record['_formatobj'], $record['_attachments'], $record['exceptions'], $record['x-custom']);

	return $record;
	}

	/**
	*
	*/
	public static function from_rcube_event($event, $old = array())
	{
	// in kolab_storage attachments are indexed by content-id
	if (is_array($event['attachments']) \|\| !empty($event['deleted_attachments'])) {
	$event['_attachments'] = array();

	foreach ($event['attachments'] as $attachment) {
	$key = null;
	// Roundcube ID has nothing to do with the storage ID, remove it
	if ($attachment['content'] \|\| $attachment['path']) {
	unset($attachment['id']);
	}
	else {
	foreach ((array)$old['_attachments'] as $cid => $oldatt) {
	if ($attachment['id'] == $oldatt['id'])
	$key = $cid;
	}
	}

	// flagged for deletion => set to false
	if ($attachment['_deleted'] \|\| in_array($attachment['id'], (array)$event['deleted_attachments'])) {
	$event['_attachments'][$key] = false;
	}
	// replace existing entry
	else if ($key) {
	$event['_attachments'][$key] = $attachment;
	}
	// append as new attachment
	else {
	$event['_attachments'][] = $attachment;
	}
	}

	$event['_attachments'] = array_merge((array)$old['_attachments'], $event['_attachments']);

	// attachments flagged for deletion => set to false
	foreach ($event['_attachments'] as $key => $attachment) {
	if ($attachment['_deleted'] \|\| in_array($attachment['id'], (array)$event['deleted_attachments'])) {
	$event['_attachments'][$key] = false;
	}
	}
	}

	return $event;
	}


	/**
	* Set CSS class according to the event's attendde partstat
	*/
	public static function add_partstat_class($event, $partstats, $user = null)
	{
	// set classes according to PARTSTAT
	if (is_array($event['attendees'])) {
	$user_emails = libcalendaring::get_instance()->get_user_emails($user);
	$partstat = 'UNKNOWN';
	foreach ($event['attendees'] as $attendee) {
	if (in_array($attendee['email'], $user_emails)) {
	$partstat = $attendee['status'];
	break;
	}
	}

	if (in_array($partstat, $partstats)) {
	$event['className'] = trim($event['className'] . ' fc-invitation-' . strtolower($partstat));
	}
	}

	return $event;
	}

	/**
	* Provide a list of revisions for the given event
	*
	* @param array $event Hash array with event properties
	*
	* @return array List of changes, each as a hash array
	* @see calendar_driver::get_event_changelog()
	*/
	public function get_event_changelog($event)
	{
	if (empty($this->bonnie_api)) {
	return false;
	}

	list($uid, $mailbox, $msguid) = $this->_resolve_event_identity($event);

	$result = $this->bonnie_api->changelog('event', $uid, $mailbox, $msguid);
	if (is_array($result) && $result['uid'] == $uid) {
	return $result['changes'];
	}

	return false;
	}

	/**
	* Get a list of property changes beteen two revisions of an event
	*
	* @param array $event Hash array with event properties
	* @param mixed $rev1 Old Revision
	* @param mixed $rev2 New Revision
	*
	* @return array List of property changes, each as a hash array
	* @see calendar_driver::get_event_diff()
	*/
	public function get_event_diff($event, $rev1, $rev2)
	{
	if (empty($this->bonnie_api)) {
	return false;
	}

	list($uid, $mailbox, $msguid) = $this->_resolve_event_identity($event);

	// get diff for the requested recurrence instance
	$instance_id = $event['id'] != $uid ? substr($event['id'], strlen($uid) + 1) : null;

	// call Bonnie API
	$result = $this->bonnie_api->diff('event', $uid, $rev1, $rev2, $mailbox, $msguid, $instance_id);
	if (is_array($result) && $result['uid'] == $uid) {
	$result['rev1'] = $rev1;
	$result['rev2'] = $rev2;

	$keymap = array(
	'dtstart' => 'start',
	'dtend' => 'end',
	'dstamp' => 'changed',
	'summary' => 'title',
	'alarm' => 'alarms',
	'attendee' => 'attendees',
	'attach' => 'attachments',
	'rrule' => 'recurrence',
	'transparency' => 'free_busy',
	'classification' => 'sensitivity',
	'lastmodified-date' => 'changed',
	);
	$prop_keymaps = array(
	'attachments' => array('fmttype' => 'mimetype', 'label' => 'name'),
	'attendees' => array('partstat' => 'status'),
	);
	$special_changes = array();

	// map kolab event properties to keys the client expects
	array_walk($result['changes'], function(&$change, $i) use ($keymap, $prop_keymaps, $special_changes) {
	if (array_key_exists($change['property'], $keymap)) {
	$change['property'] = $keymap[$change['property']];
	}
	// translate free_busy values
	if ($change['property'] == 'free_busy') {
	$change['old'] = $old['old'] ? 'free' : 'busy';
	$change['new'] = $old['new'] ? 'free' : 'busy';
	}
	// map alarms trigger value
	if ($change['property'] == 'alarms') {
	if (is_array($change['old']) && is_array($change['old']['trigger']))
	$change['old']['trigger'] = $change['old']['trigger']['value'];
	if (is_array($change['new']) && is_array($change['new']['trigger']))
	$change['new']['trigger'] = $change['new']['trigger']['value'];
	}
	// make all property keys uppercase
	if ($change['property'] == 'recurrence') {
	$special_changes['recurrence'] = $i;
	foreach (array('old','new') as $m) {
	if (is_array($change[$m])) {
	$props = array();
	foreach ($change[$m] as $k => $v)
	$props[strtoupper($k)] = $v;
	$change[$m] = $props;
	}
	}
	}
	// map property keys names
	if (is_array($prop_keymaps[$change['property']])) {
	foreach ($prop_keymaps[$change['property']] as $k => $dest) {
	if (is_array($change['old']) && array_key_exists($k, $change['old'])) {
	$change['old'][$dest] = $change['old'][$k];
	unset($change['old'][$k]);
	}
	if (is_array($change['new']) && array_key_exists($k, $change['new'])) {
	$change['new'][$dest] = $change['new'][$k];
	unset($change['new'][$k]);
	}
	}
	}

	if ($change['property'] == 'exdate') {
	$special_changes['exdate'] = $i;
	}
	else if ($change['property'] == 'rdate') {
	$special_changes['rdate'] = $i;
	}
	});

	// merge some recurrence changes
	foreach (array('exdate','rdate') as $prop) {
	if (array_key_exists($prop, $special_changes)) {
	$exdate = $result['changes'][$special_changes[$prop]];
	if (array_key_exists('recurrence', $special_changes)) {
	$recurrence = &$result['changes'][$special_changes['recurrence']];
	}
	else {
	$i = count($result['changes']);
	$result['changes'][$i] = array('property' => 'recurrence', 'old' => array(), 'new' => array());
	$recurrence = &$result['changes'][$i]['recurrence'];
	}
	$key = strtoupper($prop);
	$recurrence['old'][$key] = $exdate['old'];
	$recurrence['new'][$key] = $exdate['new'];
	unset($result['changes'][$special_changes[$prop]]);
	}
	}

	return $result;
	}

	return false;
	}

	/**
	* Return full data of a specific revision of an event
	*
	* @param array Hash array with event properties
	* @param mixed $rev Revision number
	*
	* @return array Event object as hash array
	* @see calendar_driver::get_event_revison()
	*/
	public function get_event_revison($event, $rev, $internal = false)
	{
	if (empty($this->bonnie_api)) {
	return false;
	}

	$eventid = $event['id'];
	$calid = $event['calendar'];
	list($uid, $mailbox, $msguid) = $this->_resolve_event_identity($event);

	// call Bonnie API
	$result = $this->bonnie_api->get('event', $uid, $rev, $mailbox, $msguid);
	if (is_array($result) && $result['uid'] == $uid && !empty($result['xml'])) {
	$format = kolab_format::factory('event');
	$format->load($result['xml']);
	$event = $format->to_array();
	$format->get_attachments($event, true);

	// get the right instance from a recurring event
	if ($eventid != $event['uid']) {
	$instance_id = substr($eventid, strlen($event['uid']) + 1);

	// check for recurrence exception first
	if ($instance = $format->get_instance($instance_id)) {
	$event = $instance;
	}
	else {
	// not a exception, compute recurrence...
	$event['_formatobj'] = $format;
	$recurrence_date = rcube_utils::anytodatetime($instance_id, $event['start']->getTimezone());
	foreach ($this->get_recurring_events($event, $event['start'], $recurrence_date) as $instance) {
	if ($instance['id'] == $eventid) {
	$event = $instance;
	break;
	}
	}
	}
	}

	if ($format->is_valid()) {
	$event['calendar'] = $calid;
	$event['rev'] = $result['rev'];
	return $internal ? $event : self::to_rcube_event($event);
	}
	}

	return false;
	}

	/**
	* Command the backend to restore a certain revision of an event.
	* This shall replace the current event with an older version.
	*
	* @param mixed UID string or hash array with event properties:
	* id: Event identifier
	* calendar: Calendar identifier
	* @param mixed $rev Revision number
	*
	* @return boolean True on success, False on failure
	*/
	public function restore_event_revision($event, $rev)
	{
	if (empty($this->bonnie_api)) {
	return false;
	}

	list($uid, $mailbox, $msguid) = $this->_resolve_event_identity($event);
	$calendar = $this->get_calendar($event['calendar']);
	$success = false;

	if ($calendar && $calendar->storage && $calendar->editable) {
	if ($raw_msg = $this->bonnie_api->rawdata('event', $uid, $rev, $mailbox)) {
	$imap = $this->rc->get_storage();

	// insert $raw_msg as new message
	if ($imap->save_message($calendar->storage->name, $raw_msg, null, false)) {
	$success = true;

	// delete old revision from imap and cache
	$imap->delete_message($msguid, $calendar->storage->name);
	$calendar->storage->cache->set($msguid, false);
	}
	}
	}

	return $success;
	}

	/**
	* Helper method to resolved the given event identifier into uid and folder
	*
	* @return array (uid,folder,msguid) tuple
	*/
	private function _resolve_event_identity($event)
	{
	$mailbox = $msguid = null;
	if (is_array($event)) {
	$uid = $event['uid'] ?: $event['id'];
	if (($cal = $this->get_calendar($event['calendar'])) && !($cal instanceof kolab_invitation_calendar)) {
	$mailbox = $cal->get_mailbox_id();

	// get event object from storage in order to get the real object uid an msguid
	if ($ev = $cal->get_event($event['id'])) {
	$msguid = $ev['_msguid'];
	$uid = $ev['uid'];
	}
	}
	}
	else {
	$uid = $event;

	// get event object from storage in order to get the real object uid an msguid
	if ($ev = $this->get_event($event)) {
	$mailbox = $ev['_mailbox'];
	$msguid = $ev['_msguid'];
	$uid = $ev['uid'];
	}
	}

	return array($uid, $mailbox, $msguid);
	}

	/**
	* Callback function to produce driver-specific calendar create/edit form
	*
	* @param string Request action 'form-edit\|form-new'
	* @param array Calendar properties (e.g. id, color)
	* @param array Edit form fields
	*
	* @return string HTML content of the form
	*/
	public function calendar_form($action, $calendar, $formfields)
	{
	// show default dialog for birthday calendar
	if (in_array($calendar['id'], array(self::BIRTHDAY_CALENDAR_ID, self::INVITATIONS_CALENDAR_PENDING, self::INVITATIONS_CALENDAR_DECLINED))) {
	if ($calendar['id'] != self::BIRTHDAY_CALENDAR_ID)
	unset($formfields['showalarms']);
	return parent::calendar_form($action, $calendar, $formfields);
	}

	if ($calendar['id'] && ($cal = $this->calendars[$calendar['id']])) {
	$folder = $cal->get_realname(); // UTF7
	$color = $cal->get_color();
	}
	else {
	$folder = '';
	$color = '';
	}

	$hidden_fields[] = array('name' => 'oldname', 'value' => $folder);

	$storage = $this->rc->get_storage();
	$delim = $storage->get_hierarchy_delimiter();
	$form = array();

	if (strlen($folder)) {
	$path_imap = explode($delim, $folder);
	array_pop($path_imap); // pop off name part
	$path_imap = implode($path_imap, $delim);

	$options = $storage->folder_info($folder);
	}
	else {
	$path_imap = '';
	}

	// General tab
	$form['props'] = array(
	'name' => $this->rc->gettext('properties'),
	);

	// Disable folder name input
	if (!empty($options) && ($options['norename'] \|\| $options['protected'])) {
	$input_name = new html_hiddenfield(array('name' => 'name', 'id' => 'calendar-name'));
	$formfields['name']['value'] = kolab_storage::object_name($folder)
	. $input_name->show($folder);
	}

	// calendar name (default field)
	$form['props']['fieldsets']['location'] = array(
	'name' => $this->rc->gettext('location'),
	'content' => array(
	'name' => $formfields['name']
	),
	);

	if (!empty($options) && ($options['norename'] \|\| $options['protected'])) {
	// prevent user from moving folder
	$hidden_fields[] = array('name' => 'parent', 'value' => $path_imap);
	}
	else {
	$select = kolab_storage::folder_selector('event', array('name' => 'parent', 'id' => 'calendar-parent'), $folder);
	$form['props']['fieldsets']['location']['content']['path'] = array(
	'id' => 'calendar-parent',
	'label' => $this->cal->gettext('parentcalendar'),
	'value' => $select->show(strlen($folder) ? $path_imap : ''),
	);
	}

	// calendar color (default field)
	$form['props']['fieldsets']['settings'] = array(
	'name' => $this->rc->gettext('settings'),
	'content' => array(
	'color' => $formfields['color'],
	'showalarms' => $formfields['showalarms'],
	),
	);


	if ($action != 'form-new') {
	$form['sharing'] = array(
	'name' => Q($this->cal->gettext('tabsharing')),
	'content' => html::tag('iframe', array(
	'src' => $this->cal->rc->url(array('_action' => 'calendar-acl', 'id' => $calendar['id'], 'framed' => 1)),
	'width' => '100%',
	'height' => 350,
	'border' => 0,
	'style' => 'border:0'),
	''),
	);
	}

	$this->form_html = '';
	if (is_array($hidden_fields)) {
	foreach ($hidden_fields as $field) {
	$hiddenfield = new html_hiddenfield($field);
	$this->form_html .= $hiddenfield->show() . "\n";
	}
	}

	// Create form output
	foreach ($form as $tab) {
	if (!empty($tab['fieldsets']) && is_array($tab['fieldsets'])) {
	$content = '';
	foreach ($tab['fieldsets'] as $fieldset) {
	$subcontent = $this->get_form_part($fieldset);
	if ($subcontent) {
	$content .= html::tag('fieldset', null, html::tag('legend', null, Q($fieldset['name'])) . $subcontent) ."\n";
	}
	}
	}
	else {
	$content = $this->get_form_part($tab);
	}

	if ($content) {
	$this->form_html .= html::tag('fieldset', null, html::tag('legend', null, Q($tab['name'])) . $content) ."\n";
	}
	}

	// Parse form template for skin-dependent stuff
	$this->rc->output->add_handler('calendarform', array($this, 'calendar_form_html'));
	return $this->rc->output->parse('calendar.kolabform', false, false);
	}

	/**
	* Handler for template object
	*/
	public function calendar_form_html()
	{
	return $this->form_html;
	}

	/**
	* Helper function used in calendar_form_content(). Creates a part of the form.
	*/
	private function get_form_part($form)
	{
	$content = '';

	if (is_array($form['content']) && !empty($form['content'])) {
	$table = new html_table(array('cols' => 2));
	foreach ($form['content'] as $col => $colprop) {
	- $label = !empty($colprop['label']) ? $colprop['label'] : rcube_label($col);
	+ $label = !empty($colprop['label']) ? $colprop['label'] : $this->cal->gettext($col);

	$table->add('title', html::label($colprop['id'], Q($label)));
	$table->add(null, $colprop['value']);
	}
	$content = $table->show();
	}
	else {
	$content = $form['content'];
	}

	return $content;
	}


	/**
	* Handler to render ACL form for a calendar folder
	*/
	public function calendar_acl()
	{
	$this->rc->output->add_handler('folderacl', array($this, 'calendar_acl_form'));
	$this->rc->output->send('calendar.kolabacl');
	}

	/**
	* Handler for ACL form template object
	*/
	public function calendar_acl_form()
	{
	$calid = rcube_utils::get_input_value('_id', rcube_utils::INPUT_GPC);
	if ($calid && ($cal = $this->get_calendar($calid))) {
	$folder = $cal->get_realname(); // UTF7
	$color = $cal->get_color();
	}
	else {
	$folder = '';
	$color = '';
	}

	$storage = $this->rc->get_storage();
	$delim = $storage->get_hierarchy_delimiter();
	$form = array();

	if (strlen($folder)) {
	$path_imap = explode($delim, $folder);
	array_pop($path_imap); // pop off name part
	$path_imap = implode($path_imap, $delim);

	$options = $storage->folder_info($folder);

	// Allow plugins to modify the form content (e.g. with ACL form)
	$plugin = $this->rc->plugins->exec_hook('calendar_form_kolab',
	array('form' => $form, 'options' => $options, 'name' => $folder));
	}

	if (!$plugin['form']['sharing']['content'])
	$plugin['form']['sharing']['content'] = html::div('hint', $this->cal->gettext('aclnorights'));

	return $plugin['form']['sharing']['content'];
	}

	/**
	* Handler for user_delete plugin hook
	*/
	public function user_delete($args)
	{
	$db = $this->rc->get_dbh();
	foreach (array('kolab_alarms', 'itipinvitations') as $table) {
	$db->query("DELETE FROM " . $this->rc->db->table_name($table, true)
	. " WHERE `user_id` = ?", $args['user']->ID);
	}
	}
	}
	diff --git a/plugins/calendar/lib/calendar_ui.php b/plugins/calendar/lib/calendar_ui.php
	index 2912bdff..f25d6053 100644
	--- a/plugins/calendar/lib/calendar_ui.php
	+++ b/plugins/calendar/lib/calendar_ui.php
	@@ -1,881 +1,881 @@
	<?php
	/**
	* User Interface class for the Calendar plugin
	*
	* @author Lazlo Westerhof <hello@lazlo.me>
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* Copyright (C) 2010, Lazlo Westerhof <hello@lazlo.me>
	* Copyright (C) 2014, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/


	class calendar_ui
	{
	private $rc;
	private $cal;
	private $ready = false;
	public $screen;

	function __construct($cal)
	{
	$this->cal = $cal;
	$this->rc = $cal->rc;
	$this->screen = $this->rc->task == 'calendar' ? ($this->rc->action ? $this->rc->action: 'calendar') : 'other';
	}

	/**
	* Calendar UI initialization and requests handlers
	*/
	public function init()
	{
	if ($this->ready) // already done
	return;

	// add taskbar button
	$this->cal->add_button(array(
	'command' => 'calendar',
	'class' => 'button-calendar',
	'classsel' => 'button-calendar button-selected',
	'innerclass' => 'button-inner',
	'label' => 'calendar.calendar',
	), 'taskbar');

	// load basic client script
	$this->cal->include_script('calendar_base.js');

	$skin_path = $this->cal->local_skin_path();
	$this->cal->include_stylesheet($skin_path . '/calendar.css');

	$this->ready = true;
	}

	/**
	* Register handler methods for the template engine
	*/
	public function init_templates()
	{
	$this->cal->register_handler('plugin.calendar_css', array($this, 'calendar_css'));
	$this->cal->register_handler('plugin.calendar_list', array($this, 'calendar_list'));
	$this->cal->register_handler('plugin.calendar_select', array($this, 'calendar_select'));
	$this->cal->register_handler('plugin.identity_select', array($this, 'identity_select'));
	$this->cal->register_handler('plugin.category_select', array($this, 'category_select'));
	$this->cal->register_handler('plugin.status_select', array($this, 'status_select'));
	$this->cal->register_handler('plugin.freebusy_select', array($this, 'freebusy_select'));
	$this->cal->register_handler('plugin.priority_select', array($this, 'priority_select'));
	$this->cal->register_handler('plugin.sensitivity_select', array($this, 'sensitivity_select'));
	$this->cal->register_handler('plugin.alarm_select', array($this, 'alarm_select'));
	$this->cal->register_handler('plugin.recurrence_form', array($this->cal->lib, 'recurrence_form'));
	$this->cal->register_handler('plugin.attachments_form', array($this, 'attachments_form'));
	$this->cal->register_handler('plugin.attachments_list', array($this, 'attachments_list'));
	$this->cal->register_handler('plugin.filedroparea', array($this, 'file_drop_area'));
	$this->cal->register_handler('plugin.attendees_list', array($this, 'attendees_list'));
	$this->cal->register_handler('plugin.attendees_form', array($this, 'attendees_form'));
	$this->cal->register_handler('plugin.resources_form', array($this, 'resources_form'));
	$this->cal->register_handler('plugin.resources_list', array($this, 'resources_list'));
	$this->cal->register_handler('plugin.resources_searchform', array($this, 'resources_search_form'));
	$this->cal->register_handler('plugin.resource_info', array($this, 'resource_info'));
	$this->cal->register_handler('plugin.resource_calendar', array($this, 'resource_calendar'));
	$this->cal->register_handler('plugin.attendees_freebusy_table', array($this, 'attendees_freebusy_table'));
	$this->cal->register_handler('plugin.edit_attendees_notify', array($this, 'edit_attendees_notify'));
	$this->cal->register_handler('plugin.edit_recurring_warning', array($this, 'recurring_event_warning'));
	$this->cal->register_handler('plugin.event_rsvp_buttons', array($this, 'event_rsvp_buttons'));
	$this->cal->register_handler('plugin.angenda_options', array($this, 'angenda_options'));
	$this->cal->register_handler('plugin.events_import_form', array($this, 'events_import_form'));
	$this->cal->register_handler('plugin.events_export_form', array($this, 'events_export_form'));
	$this->cal->register_handler('plugin.object_changelog_table', array('libkolab', 'object_changelog_table'));
	$this->cal->register_handler('plugin.searchform', array($this->rc->output, 'search_form')); // use generic method from rcube_template
	}

	/**
	* Adds CSS stylesheets to the page header
	*/
	public function addCSS()
	{
	$skin_path = $this->cal->local_skin_path();
	$this->cal->include_stylesheet($skin_path . '/fullcalendar.css');
	}

	/**
	* Adds JS files to the page header
	*/
	public function addJS()
	{
	$this->cal->include_script('calendar_ui.js');
	$this->cal->include_script('lib/js/fullcalendar.js');
	$this->rc->output->include_script('treelist.js');

	// include kolab folderlist widget if available
	if (in_array('libkolab', $this->cal->api->loaded_plugins())) {
	$this->cal->api->include_script('libkolab/js/folderlist.js');
	$this->cal->api->include_script('libkolab/js/audittrail.js');
	}

	jqueryui::miniColors();
	}

	/**
	*
	*/
	function calendar_css($attrib = array())
	{
	$mode = $this->rc->config->get('calendar_event_coloring', $this->cal->defaults['calendar_event_coloring']);
	$categories = $this->cal->driver->list_categories();
	$css = "\n";

	foreach ((array)$categories as $class => $color) {
	if (empty($color))
	continue;

	$class = 'cat-' . asciiwords(strtolower($class), true);
	$css .= ".$class { color: #$color }\n";
	if ($mode > 0) {
	if ($mode == 2) {
	$css .= ".fc-event-$class .fc-event-bg {";
	$css .= " opacity: 0.9;";
	$css .= " filter: alpha(opacity=90);";
	}
	else {
	$css .= ".fc-event-$class.fc-event-skin, ";
	$css .= ".fc-event-$class .fc-event-skin, ";
	$css .= ".fc-event-$class .fc-event-inner {";
	}
	$css .= " background-color: #" . $color . ";";
	if ($mode % 2)
	$css .= " border-color: #$color;";
	$css .= "}\n";
	}
	}

	$calendars = $this->cal->driver->list_calendars();
	foreach ((array)$calendars as $id => $prop) {
	if (!$prop['color'])
	continue;
	$css .= $this->calendar_css_classes($id, $prop, $mode);
	}

	return html::tag('style', array('type' => 'text/css'), $css);
	}

	/**
	*
	*/
	public function calendar_css_classes($id, $prop, $mode)
	{
	$color = $prop['color'];
	$class = 'cal-' . asciiwords($id, true);
	$css .= "li .$class, #eventshow .$class { color: #$color }\n";

	if ($mode != 1) {
	if ($mode == 3) {
	$css .= ".fc-event-$class .fc-event-bg {";
	$css .= " opacity: 0.9;";
	$css .= " filter: alpha(opacity=90);";
	}
	else {
	$css .= ".fc-event-$class, ";
	$css .= ".fc-event-$class .fc-event-inner {";
	}
	if (!$attrib['printmode'])
	$css .= " background-color: #$color;";
	if ($mode % 2 == 0)
	$css .= " border-color: #$color;";
	$css .= "}\n";
	}

	return $css . ".$class .handle { background-color: #$color; }\n";
	}

	/**
	*
	*/
	function calendar_list($attrib = array())
	{
	$html = '';
	$jsenv = array();
	$tree = true;
	$calendars = $this->cal->driver->list_calendars(0, $tree);

	// walk folder tree
	if (is_object($tree)) {
	$html = $this->list_tree_html($tree, $calendars, $jsenv, $attrib);

	// append birthdays calendar which isn't part of $tree
	if ($bdaycal = $calendars[calendar_driver::BIRTHDAY_CALENDAR_ID]) {
	$calendars = array(calendar_driver::BIRTHDAY_CALENDAR_ID => $bdaycal);
	}
	else {
	$calendars = array(); // clear array for flat listing
	}
	}
	else {
	// fall-back to flat folder listing
	$attrib['class'] .= ' flat';
	}

	foreach ((array)$calendars as $id => $prop) {
	if ($attrib['activeonly'] && !$prop['active'])
	continue;

	$html .= html::tag('li', array('id' => 'rcmlical' . $id, 'class' => $prop['group']),
	$content = $this->calendar_list_item($id, $prop, $jsenv, $attrib['activeonly'])
	);
	}

	$this->rc->output->set_env('calendars', $jsenv);
	$this->rc->output->add_gui_object('calendarslist', $attrib['id']);

	return html::tag('ul', $attrib, $html, html::$common_attrib);
	}

	/**
	* Return html for a structured list <ul> for the folder tree
	*/
	public function list_tree_html($node, $data, &$jsenv, $attrib)
	{
	$out = '';
	foreach ($node->children as $folder) {
	$id = $folder->id;
	$prop = $data[$id];
	$is_collapsed = false; // TODO: determine this somehow?

	$content = $this->calendar_list_item($id, $prop, $jsenv, $attrib['activeonly']);

	if (!empty($folder->children)) {
	$content .= html::tag('ul', array('style' => ($is_collapsed ? "display:none;" : null)),
	$this->list_tree_html($folder, $data, $jsenv, $attrib));
	}

	if (strlen($content)) {
	$out .= html::tag('li', array(
	'id' => 'rcmlical' . rcube_utils::html_identifier($id),
	'class' => $prop['group'] . ($prop['virtual'] ? ' virtual' : ''),
	),
	$content);
	}
	}

	return $out;
	}

	/**
	* Helper method to build a calendar list item (HTML content and js data)
	*/
	public function calendar_list_item($id, $prop, &$jsenv, $activeonly = false)
	{
	// enrich calendar properties with settings from the driver
	if (!$prop['virtual']) {
	unset($prop['user_id']);
	$prop['alarms'] = $this->cal->driver->alarms;
	$prop['attendees'] = $this->cal->driver->attendees;
	$prop['freebusy'] = $this->cal->driver->freebusy;
	$prop['attachments'] = $this->cal->driver->attachments;
	$prop['undelete'] = $this->cal->driver->undelete;
	$prop['feedurl'] = $this->cal->get_url(array('_cal' => $this->cal->ical_feed_hash($id) . '.ics', 'action' => 'feed'));

	$jsenv[$id] = $prop;
	}

	$classes = array('calendar', 'cal-' . asciiwords($id, true));
	$title = $prop['title'] ?: ($prop['name'] != $prop['listname'] \|\| strlen($prop['name']) > 25 ?
	html_entity_decode($prop['name'], ENT_COMPAT, RCMAIL_CHARSET) : '');

	if ($prop['virtual'])
	$classes[] = 'virtual';
	else if (!$prop['editable'])
	$classes[] = 'readonly';
	if ($prop['subscribed'])
	$classes[] = 'subscribed';
	if ($prop['subscribed'] === 2)
	$classes[] = 'partial';
	if ($prop['class'])
	$classes[] = $prop['class'];

	$content = '';
	if (!$activeonly \|\| $prop['active']) {
	$label_id = 'cl:' . $id;
	$content = html::div(join(' ', $classes),
	html::span(array('class' => 'calname', 'id' => $label_id, 'title' => $title), $prop['editname'] ? Q($prop['editname']) : $prop['listname']) .
	($prop['virtual'] ? '' :
	html::tag('input', array('type' => 'checkbox', 'name' => '_cal[]', 'value' => $id, 'checked' => $prop['active'], 'aria-labelledby' => $label_id), '') .
	html::span('actions',
	($prop['removable'] ? html::a(array('href' => '#', 'class' => 'remove', 'title' => $this->cal->gettext('removelist')), ' ') : '') .
	html::a(array('href' => '#', 'class' => 'quickview', 'title' => $this->cal->gettext('quickview'), 'role' => 'checkbox', 'aria-checked' => 'false'), '') .
	(isset($prop['subscribed']) ? html::a(array('href' => '#', 'class' => 'subscribed', 'title' => $this->cal->gettext('calendarsubscribe'), 'role' => 'checkbox', 'aria-checked' => $prop['subscribed'] ? 'true' : 'false'), ' ') : '')
	) .
	html::span(array('class' => 'handle', 'style' => "background-color: #" . ($prop['color'] ?: 'f00')), ' ')
	)
	);
	}

	return $content;
	}

	/**
	*
	*/
	function angenda_options($attrib = array())
	{
	$attrib += array('id' => 'agendaoptions');
	$attrib['style'] .= 'display:none';

	$select_range = new html_select(array('name' => 'listrange', 'id' => 'agenda-listrange'));
	$select_range->add(1 . ' ' . preg_replace('/$.+$/', '', $this->cal->lib->gettext('days')), $days);
	foreach (array(2,5,7,14,30,60,90,180,365) as $days)
	$select_range->add($days . ' ' . preg_replace('/$\|$/', '', $this->cal->lib->gettext('days')), $days);

	$html .= html::label('agenda-listrange', $this->cal->gettext('listrange'));
	$html .= $select_range->show($this->rc->config->get('calendar_agenda_range', $this->cal->defaults['calendar_agenda_range']));

	$select_sections = new html_select(array('name' => 'listsections', 'id' => 'agenda-listsections'));
	$select_sections->add('---', '');
	foreach (array('day' => 'libcalendaring.days', 'week' => 'libcalendaring.weeks', 'month' => 'libcalendaring.months', 'smart' => 'calendar.smartsections') as $val => $label)
	$select_sections->add(preg_replace('/$\|$/', '', ucfirst($this->rc->gettext($label))), $val);

	$html .= html::span('spacer', ' ');
	$html .= html::label('agenda-listsections', $this->cal->gettext('listsections'));
	$html .= $select_sections->show($this->rc->config->get('calendar_agenda_sections', $this->cal->defaults['calendar_agenda_sections']));

	return html::div($attrib, $html);
	}

	/**
	* Render a HTML select box for calendar selection
	*/
	function calendar_select($attrib = array())
	{
	$attrib['name'] = 'calendar';
	$attrib['is_escaped'] = true;
	$select = new html_select($attrib);

	foreach ((array)$this->cal->driver->list_calendars() as $id => $prop) {
	if ($prop['editable'] \|\| strpos($prop['rights'], 'i') !== false)
	$select->add($prop['name'], $id);
	}

	return $select->show(null);
	}

	/**
	* Render a HTML select box for user identity selection
	*/
	function identity_select($attrib = array())
	{
	$attrib['name'] = 'identity';
	$select = new html_select($attrib);
	$identities = $this->rc->user->list_emails();

	foreach ($identities as $ident) {
	$select->add(format_email_recipient($ident['email'], $ident['name']), $ident['identity_id']);
	}

	return $select->show(null);
	}

	/**
	* Render a HTML select box to select an event category
	*/
	function category_select($attrib = array())
	{
	$attrib['name'] = 'categories';
	$select = new html_select($attrib);
	$select->add('---', '');
	foreach (array_keys((array)$this->cal->driver->list_categories()) as $cat) {
	$select->add($cat, $cat);
	}

	return $select->show(null);
	}

	/**
	* Render a HTML select box for status property
	*/
	function status_select($attrib = array())
	{
	$attrib['name'] = 'status';
	$select = new html_select($attrib);
	$select->add('---', '');
	$select->add($this->cal->gettext('status-confirmed'), 'CONFIRMED');
	$select->add($this->cal->gettext('status-cancelled'), 'CANCELLED');
	//$select->add($this->cal->gettext('tentative'), 'TENTATIVE');
	return $select->show(null);
	}

	/**
	* Render a HTML select box for free/busy/out-of-office property
	*/
	function freebusy_select($attrib = array())
	{
	$attrib['name'] = 'freebusy';
	$select = new html_select($attrib);
	$select->add($this->cal->gettext('free'), 'free');
	$select->add($this->cal->gettext('busy'), 'busy');
	// out-of-office is not supported by libkolabxml (#3220)
	// $select->add($this->cal->gettext('outofoffice'), 'outofoffice');
	$select->add($this->cal->gettext('tentative'), 'tentative');
	return $select->show(null);
	}

	/**
	* Render a HTML select for event priorities
	*/
	function priority_select($attrib = array())
	{
	$attrib['name'] = 'priority';
	$select = new html_select($attrib);
	$select->add('---', '0');
	$select->add('1 '.$this->cal->gettext('highest'), '1');
	$select->add('2 '.$this->cal->gettext('high'), '2');
	$select->add('3 ', '3');
	$select->add('4 ', '4');
	$select->add('5 '.$this->cal->gettext('normal'), '5');
	$select->add('6 ', '6');
	$select->add('7 ', '7');
	$select->add('8 '.$this->cal->gettext('low'), '8');
	$select->add('9 '.$this->cal->gettext('lowest'), '9');
	return $select->show(null);
	}

	/**
	* Render HTML input for sensitivity selection
	*/
	function sensitivity_select($attrib = array())
	{
	$attrib['name'] = 'sensitivity';
	$select = new html_select($attrib);
	$select->add($this->cal->gettext('public'), 'public');
	$select->add($this->cal->gettext('private'), 'private');
	$select->add($this->cal->gettext('confidential'), 'confidential');
	return $select->show(null);
	}

	/**
	* Render HTML form for alarm configuration
	*/
	function alarm_select($attrib = array())
	{
	return $this->cal->lib->alarm_select($attrib, $this->cal->driver->alarm_types, $this->cal->driver->alarm_absolute);
	}

	/**
	*
	*/
	function edit_attendees_notify($attrib = array())
	{
	$checkbox = new html_checkbox(array('name' => '_notify', 'id' => 'edit-attendees-donotify', 'value' => 1));
	return html::div($attrib, html::label(null, $checkbox->show(1) . ' ' . $this->cal->gettext('sendnotifications')));
	}

	/**
	* Generate the form for recurrence settings
	*/
	function recurring_event_warning($attrib = array())
	{
	$attrib['id'] = 'edit-recurring-warning';

	$radio = new html_radiobutton(array('name' => '_savemode', 'class' => 'edit-recurring-savemode'));
	$form = html::label(null, $radio->show('', array('value' => 'current')) . $this->cal->gettext('currentevent')) . ' ' .
	html::label(null, $radio->show('', array('value' => 'future')) . $this->cal->gettext('futurevents')) . ' ' .
	html::label(null, $radio->show('all', array('value' => 'all')) . $this->cal->gettext('allevents')) . ' ' .
	html::label(null, $radio->show('', array('value' => 'new')) . $this->cal->gettext('saveasnew'));

	return html::div($attrib, html::div('message', html::span('ui-icon ui-icon-alert', '') . $this->cal->gettext('changerecurringeventwarning')) . html::div('savemode', $form));
	}

	/**
	* Form for uploading and importing events
	*/
	function events_import_form($attrib = array())
	{
	if (!$attrib['id'])
	$attrib['id'] = 'rcmImportForm';

	// Get max filesize, enable upload progress bar
	- $max_filesize = rcube_upload_init();
	+ $max_filesize = $this->rc->upload_init();

	$accept = '.ics, text/calendar, text/x-vcalendar, application/ics';
	if (class_exists('ZipArchive', false)) {
	$accept .= ', .zip, application/zip';
	}

	$input = new html_inputfield(array(
	'type' => 'file', 'name' => '_data', 'size' => $attrib['uploadfieldsize'],
	'accept' => $accept));

	$select = new html_select(array('name' => '_range', 'id' => 'event-import-range'));
	$select->add(array(
	$this->cal->gettext('onemonthback'),
	$this->cal->gettext(array('name' => 'nmonthsback', 'vars' => array('nr'=>2))),
	$this->cal->gettext(array('name' => 'nmonthsback', 'vars' => array('nr'=>3))),
	$this->cal->gettext(array('name' => 'nmonthsback', 'vars' => array('nr'=>6))),
	$this->cal->gettext(array('name' => 'nmonthsback', 'vars' => array('nr'=>12))),
	$this->cal->gettext('all'),
	),
	array('1','2','3','6','12',0));

	$html .= html::div('form-section',
	html::div(null, $input->show()) .
	- html::div('hint', rcube_label(array('name' => 'maxuploadsize', 'vars' => array('size' => $max_filesize))))
	+ html::div('hint', $this->rc->gettext(array('name' => 'maxuploadsize', 'vars' => array('size' => $max_filesize))))
	);

	$html .= html::div('form-section',
	html::label('event-import-calendar', $this->cal->gettext('calendar')) .
	$this->calendar_select(array('name' => 'calendar', 'id' => 'event-import-calendar'))
	);

	$html .= html::div('form-section',
	html::label('event-import-range', $this->cal->gettext('importrange')) .
	$select->show(1)
	);

	$this->rc->output->add_gui_object('importform', $attrib['id']);
	$this->rc->output->add_label('import');

	return html::tag('form', array('action' => $this->rc->url(array('task' => 'calendar', 'action' => 'import_events')),
	'method' => "post", 'enctype' => 'multipart/form-data', 'id' => $attrib['id']),
	$html
	);
	}

	/**
	* Form to select options for exporting events
	*/
	function events_export_form($attrib = array())
	{
	if (!$attrib['id'])
	$attrib['id'] = 'rcmExportForm';

	$html .= html::div('form-section',
	html::label('event-export-calendar', $this->cal->gettext('calendar')) .
	$this->calendar_select(array('name' => 'calendar', 'id' => 'event-export-calendar'))
	);

	$select = new html_select(array('name' => 'range', 'id' => 'event-export-range'));
	$select->add(array(
	$this->cal->gettext('all'),
	$this->cal->gettext('onemonthback'),
	$this->cal->gettext(array('name' => 'nmonthsback', 'vars' => array('nr'=>2))),
	$this->cal->gettext(array('name' => 'nmonthsback', 'vars' => array('nr'=>3))),
	$this->cal->gettext(array('name' => 'nmonthsback', 'vars' => array('nr'=>6))),
	$this->cal->gettext(array('name' => 'nmonthsback', 'vars' => array('nr'=>12))),
	$this->cal->gettext('customdate'),
	),
	array(0,'1','2','3','6','12','custom'));

	$startdate = new html_inputfield(array('name' => 'start', 'size' => 11, 'id' => 'event-export-startdate'));

	$html .= html::div('form-section',
	html::label('event-export-range', $this->cal->gettext('exportrange')) .
	$select->show(0) .
	html::span(array('style'=>'display:none'), $startdate->show())
	);

	$checkbox = new html_checkbox(array('name' => 'attachments', 'id' => 'event-export-attachments', 'value' => 1));
	$html .= html::div('form-section',
	html::label('event-export-range', $this->cal->gettext('exportattachments')) .
	$checkbox->show(1)
	);

	$this->rc->output->add_gui_object('exportform', $attrib['id']);

	return html::tag('form', array('action' => $this->rc->url(array('task' => 'calendar', 'action' => 'export_events')),
	'method' => "post", 'id' => $attrib['id']),
	$html
	);
	}

	/**
	* Generate the form for event attachments upload
	*/
	function attachments_form($attrib = array())
	{
	// add ID if not given
	if (!$attrib['id'])
	$attrib['id'] = 'rcmUploadForm';

	// Get max filesize, enable upload progress bar
	$max_filesize = rcube_upload_init();

	$button = new html_inputfield(array('type' => 'button'));
	$input = new html_inputfield(array(
	'type' => 'file', 'name' => '_attachments[]',
	'multiple' => 'multiple', 'size' => $attrib['attachmentfieldsize']));

	return html::div($attrib,
	html::div(null, $input->show()) .
	- html::div('formbuttons', $button->show(rcube_label('upload'), array('class' => 'button mainaction',
	+ html::div('formbuttons', $button->show($this->rc->gettext('upload'), array('class' => 'button mainaction',
	'onclick' => JS_OBJECT_NAME . ".upload_file(this.form)"))) .
	- html::div('hint', rcube_label(array('name' => 'maxuploadsize', 'vars' => array('size' => $max_filesize))))
	+ html::div('hint', $this->rc->gettext(array('name' => 'maxuploadsize', 'vars' => array('size' => $max_filesize))))
	);
	}

	/**
	* Register UI object for HTML5 drag & drop file upload
	*/
	function file_drop_area($attrib = array())
	{
	if ($attrib['id']) {
	$this->rc->output->add_gui_object('filedrop', $attrib['id']);
	$this->rc->output->set_env('filedrop', array('action' => 'upload', 'fieldname' => '_attachments'));
	}
	}

	/**
	* Generate HTML element for attachments list
	*/
	function attachments_list($attrib = array())
	{
	if (!$attrib['id'])
	$attrib['id'] = 'rcmAttachmentList';

	$skin_path = $this->cal->local_skin_path();
	if ($attrib['deleteicon']) {
	$_SESSION[calendar::SESSION_KEY . '_deleteicon'] = $skin_path . $attrib['deleteicon'];
	$this->rc->output->set_env('deleteicon', $skin_path . $attrib['deleteicon']);
	}
	if ($attrib['cancelicon'])
	$this->rc->output->set_env('cancelicon', $skin_path . $attrib['cancelicon']);
	if ($attrib['loadingicon'])
	$this->rc->output->set_env('loadingicon', $skin_path . $attrib['loadingicon']);

	$this->rc->output->add_gui_object('attachmentlist', $attrib['id']);
	$this->attachmentlist_id = $attrib['id'];

	return html::tag('ul', $attrib, '', html::$common_attrib);
	}

	/**
	* Handler for calendar form template.
	* The form content could be overriden by the driver
	*/
	function calendar_editform($action, $calendar = array())
	{
	// compose default calendar form fields
	$input_name = new html_inputfield(array('name' => 'name', 'id' => 'calendar-name', 'size' => 20));
	$input_color = new html_inputfield(array('name' => 'color', 'id' => 'calendar-color', 'size' => 6));

	$formfields = array(
	'name' => array(
	'label' => $this->cal->gettext('name'),
	'value' => $input_name->show($calendar['name']),
	'id' => 'calendar-name',
	),
	'color' => array(
	'label' => $this->cal->gettext('color'),
	'value' => $input_color->show($calendar['color']),
	'id' => 'calendar-color',
	),
	);

	if ($this->cal->driver->alarms) {
	$checkbox = new html_checkbox(array('name' => 'showalarms', 'id' => 'calendar-showalarms', 'value' => 1));
	$formfields['showalarms'] = array(
	'label' => $this->cal->gettext('showalarms'),
	'value' => $checkbox->show($calendar['showalarms']?1:0),
	'id' => 'calendar-showalarms',
	);
	}

	// allow driver to extend or replace the form content
	return html::tag('form', array('action' => "#", 'method' => "get", 'id' => 'calendarpropform'),
	$this->cal->driver->calendar_form($action, $calendar, $formfields)
	);
	}

	/**
	*
	*/
	function attendees_list($attrib = array())
	{
	// add "noreply" checkbox to attendees table only
	$invitations = strpos($attrib['id'], 'attend') !== false;

	$invite = new html_checkbox(array('value' => 1, 'id' => 'edit-attendees-invite'));
	$table = new html_table(array('cols' => 5 + intval($invitations), 'border' => 0, 'cellpadding' => 0, 'class' => 'rectable'));

	$table->add_header('role', $this->cal->gettext('role'));
	$table->add_header('name', $this->cal->gettext($attrib['coltitle'] ?: 'attendee'));
	$table->add_header('availability', $this->cal->gettext('availability'));
	$table->add_header('confirmstate', $this->cal->gettext('confirmstate'));
	if ($invitations) {
	$table->add_header(array('class' => 'invite', 'title' => $this->cal->gettext('sendinvitations')),
	$invite->show(1) . html::label('edit-attendees-invite', $this->cal->gettext('sendinvitations')));
	}
	$table->add_header('options', '');

	// hide invite column if disabled by config
	$itip_notify = (int)$this->rc->config->get('calendar_itip_send_option', $this->cal->defaults['calendar_itip_send_option']);
	if ($invitations && !($itip_notify & 2)) {
	$css = sprintf('#%s td.invite, #%s th.invite { display:none !important }', $attrib['id'], $attrib['id']);
	$this->rc->output->add_footer(html::tag('style', array('type' => 'text/css'), $css));
	}

	return $table->show($attrib);
	}

	/**
	*
	*/
	function attendees_form($attrib = array())
	{
	$input = new html_inputfield(array('name' => 'participant', 'id' => 'edit-attendee-name', 'size' => 30));
	$textarea = new html_textarea(array('name' => 'comment', 'id' => 'edit-attendees-comment',
	'rows' => 4, 'cols' => 55, 'title' => $this->cal->gettext('itipcommenttitle')));

	return html::div($attrib,
	html::div(null, $input->show() . " " .
	html::tag('input', array('type' => 'button', 'class' => 'button', 'id' => 'edit-attendee-add', 'value' => $this->cal->gettext('addattendee'))) . " " .
	html::tag('input', array('type' => 'button', 'class' => 'button', 'id' => 'edit-attendee-schedule', 'value' => $this->cal->gettext('scheduletime').'...'))) .
	html::p('attendees-commentbox', html::label(null, $this->cal->gettext('itipcomment') . $textarea->show()))
	);
	}

	/**
	*
	*/
	function resources_form($attrib = array())
	{
	$input = new html_inputfield(array('name' => 'resource', 'id' => 'edit-resource-name', 'size' => 30));

	return html::div($attrib,
	html::div(null, $input->show() . " " .
	html::tag('input', array('type' => 'button', 'class' => 'button', 'id' => 'edit-resource-add', 'value' => $this->cal->gettext('addresource'))) . " " .
	html::tag('input', array('type' => 'button', 'class' => 'button', 'id' => 'edit-resource-find', 'value' => $this->cal->gettext('findresources').'...')))
	);
	}

	/**
	*
	*/
	function resources_list($attrib = array())
	{
	$attrib += array('id' => 'calendar-resources-list');

	$this->rc->output->add_gui_object('resourceslist', $attrib['id']);

	return html::tag('ul', $attrib, '', html::$common_attrib);
	}

	/**
	*
	*/
	public function resource_info($attrib = array())
	{
	$attrib += array('id' => 'calendar-resources-info');

	$this->rc->output->add_gui_object('resourceinfo', $attrib['id']);
	$this->rc->output->add_gui_object('resourceownerinfo', $attrib['id'] . '-owner');

	// copy address book labels for owner details to client
	$this->rc->output->add_label('name','firstname','surname','department','jobtitle','email','phone','address');

	$table_attrib = array('id','class','style','width','summary','cellpadding','cellspacing','border');

	return html::tag('table', $attrib,
	html::tag('tbody', null, ''), $table_attrib) .

	html::tag('table', array('id' => $attrib['id'] . '-owner', 'style' => 'display:none') + $attrib,
	html::tag('thead', null,
	html::tag('tr', null,
	html::tag('td', array('colspan' => 2), Q($this->cal->gettext('resourceowner')))
	)
	) .
	html::tag('tbody', null, ''),
	$table_attrib);
	}

	/**
	*
	*/
	public function resource_calendar($attrib = array())
	{
	$attrib += array('id' => 'calendar-resources-calendar');

	$this->rc->output->add_gui_object('resourceinfocalendar', $attrib['id']);

	return html::div($attrib, '');
	}

	/**
	* GUI object 'searchform' for the resource finder dialog
	*
	* @param array Named parameters
	* @return string HTML code for the gui object
	*/
	function resources_search_form($attrib)
	{
	$attrib += array('command' => 'search-resource', 'id' => 'rcmcalresqsearchbox', 'autocomplete' => 'off');
	$attrib['name'] = '_q';

	$input_q = new html_inputfield($attrib);
	$out = $input_q->show();

	// add form tag around text field
	$out = $this->rc->output->form_tag(array(
	'name' => "rcmcalresoursqsearchform",
	'onsubmit' => rcmail_output::JS_OBJECT_NAME . ".command('" . $attrib['command'] . "'); return false",
	'style' => "display:inline"),
	$out);

	return $out;
	}

	/**
	*
	*/
	function attendees_freebusy_table($attrib = array())
	{
	$table = new html_table(array('cols' => 2, 'border' => 0, 'cellspacing' => 0));
	$table->add('attendees',
	html::tag('h3', 'boxtitle', $this->cal->gettext('tabattendees')) .
	html::div('timesheader', ' ') .
	html::div(array('id' => 'schedule-attendees-list', 'class' => 'attendees-list'), '')
	);
	$table->add('times',
	html::div('scroll',
	html::tag('table', array('id' => 'schedule-freebusy-times', 'border' => 0, 'cellspacing' => 0), html::tag('thead') . html::tag('tbody')) .
	html::div(array('id' => 'schedule-event-time', 'style' => 'display:none'), ' ')
	)
	);

	return $table->show($attrib);
	}

	/**
	*
	*/
	function event_invitebox($attrib = array())
	{
	if ($this->cal->event) {
	return html::div($attrib,
	$this->cal->itip->itip_object_details_table($this->cal->event, $this->cal->itip->gettext('itipinvitation')) .
	$this->cal->invitestatus
	);
	}

	return '';
	}

	function event_rsvp_buttons($attrib = array())
	{
	$actions = array('accepted','tentative','declined');
	if ($attrib['delegate'] !== 'false')
	$actions[] = 'delegated';

	return $this->cal->itip->itip_rsvp_buttons($attrib, $actions);
	}

	}
	diff --git a/plugins/kolab_addressbook/lib/kolab_addressbook_ui.php b/plugins/kolab_addressbook/lib/kolab_addressbook_ui.php
	index 2aa48852..6fea8d0a 100644
	--- a/plugins/kolab_addressbook/lib/kolab_addressbook_ui.php
	+++ b/plugins/kolab_addressbook/lib/kolab_addressbook_ui.php
	@@ -1,352 +1,352 @@
	<?php

	/**
	* Kolab address book UI
	*
	* @author Aleksander Machniak <machniak@kolabsys.com>
	*
	* Copyright (C) 2012, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/
	class kolab_addressbook_ui
	{
	private $plugin;
	private $rc;

	/**
	* Class constructor
	*
	* @param kolab_addressbook $plugin Plugin object
	*/
	public function __construct($plugin)
	{
	$this->rc = rcube::get_instance();
	$this->plugin = $plugin;

	$this->init_ui();
	}

	/**
	* Adds folders management functionality to Addressbook UI
	*/
	private function init_ui()
	{
	if (!empty($this->rc->action) && !preg_match('/^plugin\.book/', $this->rc->action) && $this->rc->action != 'show') {
	return;
	}

	// Include script
	$this->plugin->include_script('kolab_addressbook.js');

	if (empty($this->rc->action)) {
	// Include stylesheet (for directorylist)
	$this->plugin->include_stylesheet($this->plugin->local_skin_path().'/kolab_addressbook.css');

	// include kolab folderlist widget if available
	if (in_array('libkolab', $this->plugin->api->loaded_plugins())) {
	$this->plugin->api->include_script('libkolab/js/folderlist.js');
	}

	// Add actions on address books
	$options = array('book-create', 'book-edit', 'book-delete', 'book-remove');
	$idx = 0;

	if ($dav_url = $this->rc->config->get('kolab_addressbook_carddav_url')) {
	$options[] = 'book-showurl';
	$this->rc->output->set_env('kolab_addressbook_carddav_url', true);

	// set CardDAV URI for specified ldap addressbook
	if ($ldap_abook = $this->rc->config->get('kolab_addressbook_carddav_ldap')) {
	$dav_ldap_url = strtr($dav_url, array(
	'%h' => $_SERVER['HTTP_HOST'],
	'%u' => urlencode($this->rc->get_user_name()),
	'%i' => 'ldap-directory',
	'%n' => '',
	));
	$this->rc->output->set_env('kolab_addressbook_carddav_ldap', $ldap_abook);
	$this->rc->output->set_env('kolab_addressbook_carddav_ldap_url', $dav_ldap_url);
	}
	}

	foreach ($options as $command) {
	$content = html::tag('li', $idx ? null : array('class' => 'separator_above'),
	$this->plugin->api->output->button(array(
	'label' => 'kolab_addressbook.'.str_replace('-', '', $command),
	'domain' => $this->ID,
	'classact' => 'active',
	'command' => $command
	)));
	$this->plugin->api->add_content($content, 'groupoptions');
	$idx++;
	}

	// Link to Settings/Folders
	$content = html::tag('li', array('class' => 'separator_above'),
	$this->plugin->api->output->button(array(
	'label' => 'managefolders',
	'type' => 'link',
	'classact' => 'active',
	'command' => 'folders',
	'task' => 'settings',
	)));
	$this->plugin->api->add_content($content, 'groupoptions');

	$this->rc->output->add_label('kolab_addressbook.bookdeleteconfirm',
	'kolab_addressbook.bookdeleting', 'kolab_addressbook.bookshowurl',
	'kolab_addressbook.carddavurldescription',
	'kolab_addressbook.bookedit',
	'kolab_addressbook.bookdelete',
	'kolab_addressbook.bookshowurl',
	'kolab_addressbook.findaddressbooks',
	'kolab_addressbook.searchterms',
	'kolab_addressbook.foldersearchform',
	'kolab_addressbook.listsearchresults',
	'kolab_addressbook.nraddressbooksfound',
	'kolab_addressbook.noaddressbooksfound',
	'kolab_addressbook.foldersubscribe',
	'resetsearch');


	if ($this->plugin->bonnie_api) {
	$this->rc->output->set_env('kolab_audit_trail', true);
	$this->plugin->api->include_script('libkolab/js/audittrail.js');

	$this->rc->output->add_label(
	'kolab_addressbook.showhistory',
	'kolab_addressbook.objectchangelog',
	'kolab_addressbook.objectdiff',
	'kolab_addressbook.objectdiffnotavailable',
	'kolab_addressbook.objectchangelognotavailable',
	'kolab_addressbook.revisionrestoreconfirm'
	);

	$this->plugin->add_hook('render_page', array($this, 'render_audittrail_page'));
	$this->plugin->register_handler('plugin.object_changelog_table', array('libkolab', 'object_changelog_table'));
	}
	}
	// include stylesheet for audit trail
	else if ($this->rc->action == 'show' && $this->plugin->bonnie_api) {
	$this->plugin->include_stylesheet($this->plugin->local_skin_path().'/kolab_addressbook.css');
	$this->rc->output->add_label('kolab_addressbook.showhistory');
	}
	// book create/edit form
	else {
	$this->rc->output->add_label('kolab_addressbook.nobooknamewarning',
	'kolab_addressbook.booksaving');
	}
	}


	/**
	* Handler for address book create/edit action
	*/
	public function book_edit()
	{
	$this->rc->output->add_handler('bookdetails', array($this, 'book_form'));
	$this->rc->output->send('kolab_addressbook.bookedit');
	}


	/**
	* Handler for 'bookdetails' object returning form content for book create/edit
	*
	* @param array $attr Object attributes
	*
	* @return string HTML output
	*/
	public function book_form($attrib)
	{
	$action = trim(rcube_utils::get_input_value('_act', rcube_utils::INPUT_GPC));
	$folder = trim(rcube_utils::get_input_value('_source', rcube_utils::INPUT_GPC, true)); // UTF8

	$hidden_fields[] = array('name' => '_source', 'value' => $folder);

	$folder = rcube_charset::convert($folder, RCMAIL_CHARSET, 'UTF7-IMAP');
	$storage = $this->rc->get_storage();
	$delim = $storage->get_hierarchy_delimiter();

	if ($this->rc->action == 'plugin.book-save') {
	// save error
	$name = trim(rcube_utils::get_input_value('_name', rcube_utils::INPUT_GPC, true)); // UTF8
	$old = trim(rcube_utils::get_input_value('_oldname', rcube_utils::INPUT_GPC, true)); // UTF7-IMAP
	$path_imap = trim(rcube_utils::get_input_value('_parent', rcube_utils::INPUT_GPC, true)); // UTF7-IMAP

	$hidden_fields[] = array('name' => '_oldname', 'value' => $old);

	$folder = $old;
	}
	else if ($action == 'edit') {
	$path_imap = explode($delim, $folder);
	$name = rcube_charset::convert(array_pop($path_imap), 'UTF7-IMAP');
	$path_imap = implode($path_imap, $delim);
	}
	else { // create
	$path_imap = $folder;
	$name = '';
	$folder = '';
	}

	// Store old name, get folder options
	if (strlen($folder)) {
	$hidden_fields[] = array('name' => '_oldname', 'value' => $folder);

	$options = $storage->folder_info($folder);
	}

	$form = array();

	// General tab
	$form['props'] = array(
	'name' => $this->rc->gettext('properties'),
	);

	if (!empty($options) && ($options['norename'] \|\| $options['protected'])) {
	$foldername = Q(str_replace($delim, ' » ', kolab_storage::object_name($folder)));
	}
	else {
	$foldername = new html_inputfield(array('name' => '_name', 'id' => '_name', 'size' => 30));
	$foldername = $foldername->show($name);
	}

	$form['props']['fieldsets']['location'] = array(
	'name' => $this->rc->gettext('location'),
	'content' => array(
	'name' => array(
	'label' => $this->plugin->gettext('bookname'),
	'value' => $foldername,
	),
	),
	);

	if (!empty($options) && ($options['norename'] \|\| $options['protected'])) {
	// prevent user from moving folder
	$hidden_fields[] = array('name' => '_parent', 'value' => $path_imap);
	}
	else {
	$select = kolab_storage::folder_selector('contact', array('name' => '_parent'), $folder);

	$form['props']['fieldsets']['location']['content']['path'] = array(
	'label' => $this->plugin->gettext('parentbook'),
	'value' => $select->show(strlen($folder) ? $path_imap : ''),
	);
	}

	// Allow plugins to modify address book form content (e.g. with ACL form)
	$plugin = $this->rc->plugins->exec_hook('addressbook_form',
	array('form' => $form, 'options' => $options, 'name' => $folder));

	$form = $plugin['form'];

	// Set form tags and hidden fields
	list($form_start, $form_end) = $this->get_form_tags($attrib, 'plugin.book-save', null, $hidden_fields);

	unset($attrib['form']);

	// return the complete edit form as table
	$out = "$form_start\n";

	// Create form output
	foreach ($form as $tab) {
	if (!empty($tab['fieldsets']) && is_array($tab['fieldsets'])) {
	$content = '';
	foreach ($tab['fieldsets'] as $fieldset) {
	$subcontent = $this->get_form_part($fieldset);
	if ($subcontent) {
	$content .= html::tag('fieldset', null, html::tag('legend', null, Q($fieldset['name'])) . $subcontent) ."\n";
	}
	}
	}
	else {
	$content = $this->get_form_part($tab);
	}

	if ($content) {
	$out .= html::tag('fieldset', null, html::tag('legend', null, Q($tab['name'])) . $content) ."\n";
	}
	}

	$out .= "\n$form_end";

	return $out;
	}

	/**
	*
	*/
	public function render_audittrail_page($p)
	{
	// append audit trail UI elements to contact page
	if ($p['template'] === 'addressbook' && !$p['kolab-audittrail']) {
	$this->rc->output->add_footer($this->rc->output->parse('kolab_addressbook.audittrail', false, false));
	$p['kolab-audittrail'] = true;
	}

	return $p;
	}


	private function get_form_part($form)
	{
	$content = '';

	if (is_array($form['content']) && !empty($form['content'])) {
	$table = new html_table(array('cols' => 2, 'class' => 'propform'));
	foreach ($form['content'] as $col => $colprop) {
	$colprop['id'] = '_'.$col;
	- $label = !empty($colprop['label']) ? $colprop['label'] : rcube_label($col);
	+ $label = !empty($colprop['label']) ? $colprop['label'] : $this->rc->gettext($col);

	$table->add('title', sprintf('<label for="%s">%s</label>', $colprop['id'], Q($label)));
	$table->add(null, $colprop['value']);
	}
	$content = $table->show();
	}
	else {
	$content = $form['content'];
	}

	return $content;
	}


	private function get_form_tags($attrib, $action, $id = null, $hidden = null)
	{
	$form_start = $form_end = '';

	$request_key = $action . (isset($id) ? '.'.$id : '');
	$form_start = $this->rc->output->request_form(array(
	'name' => 'form',
	'method' => 'post',
	'task' => $this->rc->task,
	'action' => $action,
	'request' => $request_key,
	'noclose' => true,
	) + $attrib);

	if (is_array($hidden)) {
	foreach ($hidden as $field) {
	$hiddenfield = new html_hiddenfield($field);
	$form_start .= $hiddenfield->show();
	}
	}

	$form_end = !strlen($attrib['form']) ? '</form>' : '';

	$EDIT_FORM = !empty($attrib['form']) ? $attrib['form'] : 'form';
	$this->rc->output->add_gui_object('editform', $EDIT_FORM);

	return array($form_start, $form_end);
	}

	}
	diff --git a/plugins/kolab_addressbook/lib/rcube_kolab_contacts.php b/plugins/kolab_addressbook/lib/rcube_kolab_contacts.php
	index c6dfd112..48e056ce 100644
	--- a/plugins/kolab_addressbook/lib/rcube_kolab_contacts.php
	+++ b/plugins/kolab_addressbook/lib/rcube_kolab_contacts.php
	@@ -1,1298 +1,1300 @@
	<?php

	/**
	* Backend class for a custom address book
	*
	* This part of the Roundcube+Kolab integration and connects the
	* rcube_addressbook interface with the kolab_storage wrapper from libkolab
	*
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	* @author Aleksander Machniak <machniak@kolabsys.com>
	*
	* Copyright (C) 2011, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*
	* @see rcube_addressbook
	*/
	class rcube_kolab_contacts extends rcube_addressbook
	{
	public $primary_key = 'ID';
	public $rights = 'lrs';
	public $readonly = true;
	public $undelete = true;
	public $groups = true;
	public $coltypes = array(
	'name' => array('limit' => 1),
	'firstname' => array('limit' => 1),
	'surname' => array('limit' => 1),
	'middlename' => array('limit' => 1),
	'prefix' => array('limit' => 1),
	'suffix' => array('limit' => 1),
	'nickname' => array('limit' => 1),
	'jobtitle' => array('limit' => 1),
	'organization' => array('limit' => 1),
	'department' => array('limit' => 1),
	'email' => array('subtypes' => array('home','work','other')),
	'phone' => array(),
	'address' => array('subtypes' => array('home','work','office')),
	'website' => array('subtypes' => array('homepage','blog')),
	'im' => array('subtypes' => null),
	'gender' => array('limit' => 1),
	'birthday' => array('limit' => 1),
	'anniversary' => array('limit' => 1),
	'profession' => array('type' => 'text', 'size' => 40, 'maxlength' => 80, 'limit' => 1,
	'label' => 'kolab_addressbook.profession', 'category' => 'personal'),
	'manager' => array('limit' => null),
	'assistant' => array('limit' => null),
	'spouse' => array('limit' => 1),
	'children' => array('type' => 'text', 'size' => 40, 'maxlength' => 80, 'limit' => null,
	'label' => 'kolab_addressbook.children', 'category' => 'personal'),
	'freebusyurl' => array('type' => 'text', 'size' => 40, 'limit' => 1,
	'label' => 'kolab_addressbook.freebusyurl'),
	'pgppublickey' => array('type' => 'textarea', 'size' => 70, 'rows' => 10, 'limit' => 1,
	'label' => 'kolab_addressbook.pgppublickey'),
	'pkcs7publickey' => array('type' => 'textarea', 'size' => 70, 'rows' => 10, 'limit' => 1,
	'label' => 'kolab_addressbook.pkcs7publickey'),
	'notes' => array('limit' => 1),
	'photo' => array('limit' => 1),
	// TODO: define more Kolab-specific fields such as: language, latitude, longitude, crypto settings
	);

	/**
	* vCard additional fields mapping
	*/
	public $vcard_map = array(
	'profession' => 'X-PROFESSION',
	'officelocation' => 'X-OFFICE-LOCATION',
	'initials' => 'X-INITIALS',
	'children' => 'X-CHILDREN',
	'freebusyurl' => 'X-FREEBUSY-URL',
	'pgppublickey' => 'KEY',
	);

	/**
	* List of date type fields
	*/
	public $date_cols = array('birthday', 'anniversary');

	private $gid;
	private $storagefolder;
	private $dataset;
	private $sortindex;
	private $contacts;
	private $distlists;
	private $groupmembers;
	private $filter;
	private $result;
	private $namespace;
	private $imap_folder = 'INBOX/Contacts';
	private $action;


	public function __construct($imap_folder = null)
	{
	if ($imap_folder) {
	$this->imap_folder = $imap_folder;
	}

	// extend coltypes configuration
	$format = kolab_format::factory('contact');
	$this->coltypes['phone']['subtypes'] = array_keys($format->phonetypes);
	$this->coltypes['address']['subtypes'] = array_keys($format->addresstypes);

	+ $rcube = rcube::get_instance();
	+
	// set localized labels for proprietary cols
	foreach ($this->coltypes as $col => $prop) {
	if (is_string($prop['label']))
	- $this->coltypes[$col]['label'] = rcube_label($prop['label']);
	+ $this->coltypes[$col]['label'] = $rcube->gettext($prop['label']);
	}

	// fetch objects from the given IMAP folder
	$this->storagefolder = kolab_storage::get_folder($this->imap_folder);
	$this->ready = $this->storagefolder && !PEAR::isError($this->storagefolder);

	// Set readonly and rights flags according to folder permissions
	if ($this->ready) {
	if ($this->storagefolder->get_owner() == $_SESSION['username']) {
	$this->readonly = false;
	$this->rights = 'lrswikxtea';
	}
	else {
	$rights = $this->storagefolder->get_myrights();
	if ($rights && !PEAR::isError($rights)) {
	$this->rights = $rights;
	if (strpos($rights, 'i') !== false && strpos($rights, 't') !== false)
	$this->readonly = false;
	}
	}
	}

	$this->action = rcube::get_instance()->action;
	}


	/**
	* Getter for the address book name to be displayed
	*
	* @return string Name of this address book
	*/
	public function get_name()
	{
	$folder = kolab_storage::object_name($this->imap_folder, $this->namespace);
	return $folder;
	}

	/**
	* Wrapper for kolab_storage_folder::get_foldername()
	*/
	public function get_foldername()
	{
	return $this->storagefolder->get_foldername();
	}


	/**
	* Getter for the IMAP folder name
	*
	* @return string Name of the IMAP folder
	*/
	public function get_realname()
	{
	return $this->imap_folder;
	}


	/**
	* Getter for the name of the namespace to which the IMAP folder belongs
	*
	* @return string Name of the namespace (personal, other, shared)
	*/
	public function get_namespace()
	{
	if ($this->namespace === null && $this->ready) {
	$this->namespace = $this->storagefolder->get_namespace();
	}

	return $this->namespace;
	}

	/**
	* Getter for parent folder path
	*
	* @return string Full path to parent folder
	*/
	public function get_parent()
	{
	return $this->storagefolder->get_parent();
	}

	/**
	* Check subscription status of this folder
	*
	* @return boolean True if subscribed, false if not
	*/
	public function is_subscribed()
	{
	return kolab_storage::folder_is_subscribed($this->imap_folder);
	}

	/**
	* Compose an URL for CardDAV access to this address book (if configured)
	*/
	public function get_carddav_url()
	{
	$rcmail = rcmail::get_instance();
	if ($template = $rcmail->config->get('kolab_addressbook_carddav_url', null)) {
	return strtr($template, array(
	'%h' => $_SERVER['HTTP_HOST'],
	'%u' => urlencode($rcmail->get_user_name()),
	'%i' => urlencode($this->storagefolder->get_uid()),
	'%n' => urlencode($this->imap_folder),
	));
	}

	return false;
	}

	/**
	* Setter for the current group
	*/
	public function set_group($gid)
	{
	$this->gid = $gid;
	}


	/**
	* Save a search string for future listings
	*
	* @param mixed Search params to use in listing method, obtained by get_search_set()
	*/
	public function set_search_set($filter)
	{
	$this->filter = $filter;
	}


	/**
	* Getter for saved search properties
	*
	* @return mixed Search properties used by this class
	*/
	public function get_search_set()
	{
	return $this->filter;
	}


	/**
	* Reset saved results and search parameters
	*/
	public function reset()
	{
	$this->result = null;
	$this->filter = null;
	}


	/**
	* List all active contact groups of this source
	*
	* @param string Optional search string to match group name
	* @return array Indexed list of contact groups, each a hash array
	*/
	function list_groups($search = null)
	{
	$this->_fetch_groups();
	$groups = array();

	foreach ((array)$this->distlists as $group) {
	if (!$search \|\| strstr(strtolower($group['name']), strtolower($search)))
	$groups[$group['name']] = array('ID' => $group['ID'], 'name' => $group['name']);
	}

	// sort groups
	ksort($groups, SORT_LOCALE_STRING);

	return array_values($groups);
	}


	/**
	* List the current set of contact records
	*
	* @param array List of cols to show
	* @param int Only return this number of records, use negative values for tail
	* @param boolean True to skip the count query (select only)
	*
	* @return array Indexed list of contact records, each a hash array
	*/
	public function list_records($cols = null, $subset = 0, $nocount = false)
	{
	$this->result = new rcube_result_set(0, ($this->list_page-1) * $this->page_size);
	$fetch_all = false;

	// list member of the selected group
	if ($this->gid) {
	$this->_fetch_groups();

	$this->sortindex = array();
	$this->contacts = array();
	$local_sortindex = array();
	$uids = array();

	// get members with email specified
	foreach ((array)$this->distlists[$this->gid]['member'] as $member) {
	// skip member that don't match the search filter
	if (!empty($this->filter['ids']) && array_search($member['ID'], $this->filter['ids']) === false) {
	continue;
	}

	if (!empty($member['uid'])) {
	$uids[] = $member['uid'];
	}
	else if (!empty($member['email'])) {
	$this->contacts[$member['ID']] = $member;
	$local_sortindex[$member['ID']] = $this->_sort_string($member);
	$fetch_all = true;
	}
	}

	// get members by UID
	if (!empty($uids)) {
	$this->_fetch_contacts($query = array(array('uid', '=', $uids)), !$fetch_all);
	$this->sortindex = array_merge($this->sortindex, $local_sortindex);
	}
	}
	else if (is_array($this->filter['ids'])) {
	$ids = $this->filter['ids'];
	if (count($ids)) {
	$uids = array_map(array($this, 'id2uid'), $this->filter['ids']);
	$this->_fetch_contacts($query = array(array('uid', '=', $uids)), true);
	}
	}
	else {
	$this->_fetch_contacts($query = 'contact', true);
	}

	if ($fetch_all) {
	// sort results (index only)
	asort($this->sortindex, SORT_LOCALE_STRING);
	$ids = array_keys($this->sortindex);

	// fill contact data into the current result set
	$this->result->count = count($ids);
	$start_row = $subset < 0 ? $this->result->first + $this->page_size + $subset : $this->result->first;
	$last_row = min($subset != 0 ? $start_row + abs($subset) : $this->result->first + $this->page_size, $this->result->count);

	for ($i = $start_row; $i < $last_row; $i++) {
	if (array_key_exists($i, $ids)) {
	$idx = $ids[$i];
	$this->result->add($this->contacts[$idx] ?: $this->_to_rcube_contact($this->dataset[$idx]));
	}
	}
	}
	else if (!empty($this->dataset)) {
	// get all records count, skip the query if possible
	if (!isset($query) \|\| count($this->dataset) < $this->page_size) {
	$this->result->count = count($this->dataset) + $this->page_size * ($this->list_page - 1);
	}
	else {
	$this->result->count = $this->storagefolder->count($query);
	}

	$start_row = $subset < 0 ? $this->page_size + $subset : 0;
	$last_row = min($subset != 0 ? $start_row + abs($subset) : $this->page_size, $this->result->count);

	for ($i = $start_row; $i < $last_row; $i++) {
	$this->result->add($this->_to_rcube_contact($this->dataset[$i]));
	}
	}

	return $this->result;
	}


	/**
	* Search records
	*
	* @param mixed $fields The field name of array of field names to search in
	* @param mixed $value Search value (or array of values when $fields is array)
	* @param int $mode Matching mode:
	* 0 - partial (abc),
	* 1 - strict (=),
	* 2 - prefix (abc*)
	* @param boolean $select True if results are requested, False if count only
	* @param boolean $nocount True to skip the count query (select only)
	* @param array $required List of fields that cannot be empty
	*
	* @return object rcube_result_set List of contact records and 'count' value
	*/
	public function search($fields, $value, $mode=0, $select=true, $nocount=false, $required=array())
	{
	// search by ID
	if ($fields == $this->primary_key) {
	$ids = !is_array($value) ? explode(',', $value) : $value;
	$result = new rcube_result_set();

	foreach ($ids as $id) {
	if ($rec = $this->get_record($id, true)) {
	$result->add($rec);
	$result->count++;
	}
	}
	return $result;
	}
	else if ($fields == '*') {
	$fields = array_keys($this->coltypes);
	}

	if (!is_array($fields))
	$fields = array($fields);
	if (!is_array($required) && !empty($required))
	$required = array($required);

	// advanced search
	if (is_array($value)) {
	$advanced = true;
	$value = array_map('mb_strtolower', $value);
	}
	else
	$value = mb_strtolower($value);

	$scount = count($fields);
	// build key name regexp
	$regexp = '/^(' . implode($fields, '\|') . ')(?:.*)$/';

	// pass query to storage if only indexed cols are involved
	// NOTE: this is only some rough pre-filtering but probably includes false positives
	$squery = $this->_search_query($fields, $value, $mode);

	// add magic selector to select contacts with birthday dates only
	if (in_array('birthday', $required)) {
	$squery[] = array('tags', '=', 'x-has-birthday');
	}

	// get all/matching records
	$this->_fetch_contacts($squery);

	// save searching conditions
	$this->filter = array('fields' => $fields, 'value' => $value, 'mode' => $mode, 'ids' => array());

	// search by iterating over all records in dataset
	foreach ($this->dataset as $record) {
	$contact = $this->_to_rcube_contact($record);
	$id = $contact['ID'];

	// check if current contact has required values, otherwise skip it
	if ($required) {
	foreach ($required as $f) {
	// required field might be 'email', but contact might contain 'email:home'
	if (!($v = rcube_addressbook::get_col_values($f, $contact, true)) \|\| empty($v)) {
	continue 2;
	}
	}
	}

	$found = array();
	$contents = '';
	foreach (preg_grep($regexp, array_keys($contact)) as $col) {
	$pos = strpos($col, ':');
	$colname = $pos ? substr($col, 0, $pos) : $col;

	foreach ((array)$contact[$col] as $val) {
	if ($advanced) {
	$found[$colname] = $this->compare_search_value($colname, $val, $value[array_search($colname, $fields)], $mode);
	}
	else {
	$contents .= ' ' . join(' ', (array)$val);
	}
	}
	}

	// compare matches
	if (($advanced && count($found) >= $scount) \|\|
	(!$advanced && rcube_utils::words_match(mb_strtolower($contents), $value))) {
	$this->filter['ids'][] = $id;
	}
	}

	// dummy result with contacts count
	if (!$select) {
	return new rcube_result_set(count($this->filter['ids']), ($this->list_page-1) * $this->page_size);
	}

	// list records (now limited by $this->filter)
	return $this->list_records();
	}


	/**
	* Refresh saved search results after data has changed
	*/
	public function refresh_search()
	{
	if ($this->filter)
	$this->search($this->filter['fields'], $this->filter['value'], $this->filter['mode']);

	return $this->get_search_set();
	}


	/**
	* Count number of available contacts in database
	*
	* @return rcube_result_set Result set with values for 'count' and 'first'
	*/
	public function count()
	{
	if ($this->gid) {
	$this->_fetch_groups();
	$count = count($this->distlists[$this->gid]['member']);
	}
	else if (is_array($this->filter['ids'])) {
	$count = count($this->filter['ids']);
	}
	else {
	$count = $this->storagefolder->count('contact');
	}

	return new rcube_result_set($count, ($this->list_page-1) * $this->page_size);
	}


	/**
	* Return the last result set
	*
	* @return rcube_result_set Current result set or NULL if nothing selected yet
	*/
	public function get_result()
	{
	return $this->result;
	}


	/**
	* Get a specific contact record
	*
	* @param mixed record identifier(s)
	* @param boolean True to return record as associative array, otherwise a result set is returned
	* @return mixed Result object with all record fields or False if not found
	*/
	public function get_record($id, $assoc=false)
	{
	$rec = null;
	$uid = $this->id2uid($id);
	$rev = rcube_utils::get_input_value('_rev', rcube_utils::INPUT_GPC);

	if (strpos($uid, 'mailto:') === 0) {
	$this->_fetch_groups(true);
	$rec = $this->contacts[$id];
	$this->readonly = true; // set source to read-only
	}
	else if (!empty($rev)) {
	$rcmail = rcube::get_instance();
	$plugin = $rcmail->plugins->get_plugin('kolab_addressbook');
	if ($plugin && ($object = $plugin->get_revision($id, kolab_storage::id_encode($this->imap_folder), $rev))) {
	$rec = $this->_to_rcube_contact($object);
	$rec['rev'] = $rev;
	}
	$this->readonly = true; // set source to read-only
	}
	else if ($object = $this->storagefolder->get_object($uid)) {
	$rec = $this->_to_rcube_contact($object);
	}

	if ($rec) {
	$this->result = new rcube_result_set(1);
	$this->result->add($rec);
	return $assoc ? $rec : $this->result;
	}

	return false;
	}


	/**
	* Get group assignments of a specific contact record
	*
	* @param mixed Record identifier
	* @return array List of assigned groups as ID=>Name pairs
	*/
	public function get_record_groups($id)
	{
	$out = array();
	$this->_fetch_groups();

	foreach ((array)$this->groupmembers[$id] as $gid) {
	if ($group = $this->distlists[$gid])
	$out[$gid] = $group['name'];
	}

	return $out;
	}


	/**
	* Create a new contact record
	*
	* @param array Assoziative array with save data
	* Keys: Field name with optional section in the form FIELD:SECTION
	* Values: Field value. Can be either a string or an array of strings for multiple values
	* @param boolean True to check for duplicates first
	* @return mixed The created record ID on success, False on error
	*/
	public function insert($save_data, $check=false)
	{
	if (!is_array($save_data))
	return false;

	$insert_id = $existing = false;

	// check for existing records by e-mail comparison
	if ($check) {
	foreach ($this->get_col_values('email', $save_data, true) as $email) {
	if (($res = $this->search('email', $email, true, false)) && $res->count) {
	$existing = true;
	break;
	}
	}
	}

	if (!$existing) {
	// remove existing id attributes (#1101)
	unset($save_data['ID'], $save_data['uid']);

	// generate new Kolab contact item
	$object = $this->_from_rcube_contact($save_data);
	$saved = $this->storagefolder->save($object, 'contact');

	if (!$saved) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error saving contact object to Kolab server"),
	true, false);
	}
	else {
	$insert_id = $this->uid2id($object['uid']);
	}
	}

	return $insert_id;
	}


	/**
	* Update a specific contact record
	*
	* @param mixed Record identifier
	* @param array Assoziative array with save data
	* Keys: Field name with optional section in the form FIELD:SECTION
	* Values: Field value. Can be either a string or an array of strings for multiple values
	* @return boolean True on success, False on error
	*/
	public function update($id, $save_data)
	{
	$updated = false;
	if ($old = $this->storagefolder->get_object($this->id2uid($id))) {
	$object = $this->_from_rcube_contact($save_data, $old);

	if (!$this->storagefolder->save($object, 'contact', $old['uid'])) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error saving contact object to Kolab server"),
	true, false);
	}
	else {
	$updated = true;

	// TODO: update data in groups this contact is member of
	}
	}

	return $updated;
	}


	/**
	* Mark one or more contact records as deleted
	*
	* @param array Record identifiers
	* @param boolean Remove record(s) irreversible (mark as deleted otherwise)
	*
	* @return int Number of records deleted
	*/
	public function delete($ids, $force=true)
	{
	$this->_fetch_groups();

	if (!is_array($ids))
	$ids = explode(',', $ids);

	$count = 0;
	foreach ($ids as $id) {
	if ($uid = $this->id2uid($id)) {
	$is_mailto = strpos($uid, 'mailto:') === 0;
	$deleted = $is_mailto \|\| $this->storagefolder->delete($uid, $force);

	if (!$deleted) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error deleting a contact object $uid from the Kolab server"),
	true, false);
	}
	else {
	// remove from distribution lists
	foreach ((array)$this->groupmembers[$id] as $gid) {
	if (!$is_mailto \|\| $gid == $this->gid)
	$this->remove_from_group($gid, $id);
	}

	// clear internal cache
	unset($this->groupmembers[$id]);
	$count++;
	}
	}
	}

	return $count;
	}


	/**
	* Undelete one or more contact records.
	* Only possible just after delete (see 2nd argument of delete() method).
	*
	* @param array Record identifiers
	*
	* @return int Number of records restored
	*/
	public function undelete($ids)
	{
	if (!is_array($ids))
	$ids = explode(',', $ids);

	$count = 0;
	foreach ($ids as $id) {
	$uid = $this->id2uid($id);
	if ($this->storagefolder->undelete($uid)) {
	$count++;
	}
	else {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error undeleting a contact object $uid from the Kolab server"),
	true, false);
	}
	}

	return $count;
	}


	/**
	* Remove all records from the database
	*/
	public function delete_all()
	{
	if ($this->storagefolder->delete_all()) {
	$this->contacts = array();
	$this->sortindex = array();
	$this->dataset = null;
	$this->result = null;
	}
	}


	/**
	* Close connection to source
	* Called on script shutdown
	*/
	public function close()
	{
	}


	/**
	* Create a contact group with the given name
	*
	* @param string The group name
	* @return mixed False on error, array with record props in success
	*/
	function create_group($name)
	{
	$this->_fetch_groups();
	$result = false;

	$list = array(
	'name' => $name,
	'member' => array(),
	);
	$saved = $this->storagefolder->save($list, 'distribution-list');

	if (!$saved) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error saving distribution-list object to Kolab server"),
	true, false);
	return false;
	}
	else {
	$id = $this->uid2id($list['uid']);
	$this->distlists[$id] = $list;
	$result = array('id' => $id, 'name' => $name);
	}

	return $result;
	}

	/**
	* Delete the given group and all linked group members
	*
	* @param string Group identifier
	* @return boolean True on success, false if no data was changed
	*/
	function delete_group($gid)
	{
	$this->_fetch_groups();
	$result = false;

	if ($list = $this->distlists[$gid]) {
	$deleted = $this->storagefolder->delete($list['uid']);
	}

	if (!$deleted) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error deleting distribution-list object from the Kolab server"),
	true, false);
	}
	else {
	$result = true;
	}

	return $result;
	}

	/**
	* Rename a specific contact group
	*
	* @param string Group identifier
	* @param string New name to set for this group
	* @return boolean New name on success, false if no data was changed
	*/
	function rename_group($gid, $newname)
	{
	$this->_fetch_groups();
	$list = $this->distlists[$gid];

	if ($newname != $list['name']) {
	$list['name'] = $newname;
	$saved = $this->storagefolder->save($list, 'distribution-list', $list['uid']);
	}

	if (!$saved) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error saving distribution-list object to Kolab server"),
	true, false);
	return false;
	}

	return $newname;
	}

	/**
	* Add the given contact records the a certain group
	*
	* @param string Group identifier
	* @param array List of contact identifiers to be added
	* @return int Number of contacts added
	*/
	function add_to_group($gid, $ids)
	{
	if (!is_array($ids)) {
	$ids = explode(',', $ids);
	}

	$this->_fetch_groups(true);

	$list = $this->distlists[$gid];
	$added = 0;
	$uids = array();
	$exists = array();

	foreach ((array)$list['member'] as $member) {
	$exists[] = $member['ID'];
	}

	// substract existing assignments from list
	$ids = array_unique(array_diff($ids, $exists));

	// add mailto: members
	foreach ($ids as $contact_id) {
	$uid = $this->id2uid($contact_id);
	if (strpos($uid, 'mailto:') === 0 && ($contact = $this->contacts[$contact_id])) {
	$list['member'][] = array(
	'email' => $contact['email'],
	'name' => $contact['name'],
	);
	$this->groupmembers[$contact_id][] = $gid;
	$added++;
	}
	else {
	$uids[$uid] = $contact_id;
	}
	}

	// add members with UID
	if (!empty($uids)) {
	foreach ($uids as $uid => $contact_id) {
	$list['member'][] = array('uid' => $uid);
	$this->groupmembers[$contact_id][] = $gid;
	$added++;
	}
	}

	if ($added)
	$saved = $this->storagefolder->save($list, 'distribution-list', $list['uid']);
	else
	$saved = true;

	if (!$saved) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error saving distribution-list to Kolab server"),
	true, false);
	$added = false;
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	}
	else {
	$this->distlists[$gid] = $list;
	}

	return $added;
	}

	/**
	* Remove the given contact records from a certain group
	*
	* @param string Group identifier
	* @param array List of contact identifiers to be removed
	* @return int Number of deleted group members
	*/
	function remove_from_group($gid, $ids)
	{
	if (!is_array($ids))
	$ids = explode(',', $ids);

	$this->_fetch_groups();
	if (!($list = $this->distlists[$gid]))
	return false;

	$new_member = array();
	foreach ((array)$list['member'] as $member) {
	if (!in_array($member['ID'], $ids))
	$new_member[] = $member;
	}

	// write distribution list back to server
	$list['member'] = $new_member;
	$saved = $this->storagefolder->save($list, 'distribution-list', $list['uid']);

	if (!$saved) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error saving distribution-list object to Kolab server"),
	true, false);
	}
	else {
	// remove group assigments in local cache
	foreach ($ids as $id) {
	$j = array_search($gid, $this->groupmembers[$id]);
	unset($this->groupmembers[$id][$j]);
	}
	$this->distlists[$gid] = $list;
	return true;
	}

	return false;
	}

	/**
	* Check the given data before saving.
	* If input not valid, the message to display can be fetched using get_error()
	*
	* @param array Associative array with contact data to save
	*
	* @return boolean True if input is valid, False if not.
	*/
	public function validate(&$save_data)
	{
	// validate e-mail addresses
	$valid = parent::validate($save_data);

	// require at least one e-mail address if there's no name
	// (syntax check is already done)
	if ($valid) {
	if (!strlen($save_data['name'])
	&& !strlen($save_data['organization'])
	&& !array_filter($this->get_col_values('email', $save_data, true))
	) {
	$this->set_error('warning', 'kolab_addressbook.noemailnamewarning');
	$valid = false;
	}
	}

	return $valid;
	}

	/**
	* Query storage layer and store records in private member var
	*/
	private function _fetch_contacts($query = array(), $limit = false)
	{
	if (!isset($this->dataset) \|\| !empty($query)) {
	if ($limit) {
	$this->storagefolder->set_order_and_limit($this->_sort_columns(), $this->page_size, ($this->list_page-1) * $this->page_size);
	}
	$this->sortindex = array();
	$this->dataset = $this->storagefolder->select($query);
	foreach ($this->dataset as $idx => $record) {
	$contact = $this->_to_rcube_contact($record);
	$this->sortindex[$idx] = $this->_sort_string($contact);
	}
	}
	}

	/**
	* Extract a string for sorting from the given contact record
	*/
	private function _sort_string($rec)
	{
	$str = '';

	switch ($this->sort_col) {
	case 'name':
	$str = $rec['name'] . $rec['prefix'];
	case 'firstname':
	$str .= $rec['firstname'] . $rec['middlename'] . $rec['surname'];
	break;

	case 'surname':
	$str = $rec['surname'] . $rec['firstname'] . $rec['middlename'];
	break;

	default:
	$str = $rec[$this->sort_col];
	break;
	}

	$str .= is_array($rec['email']) ? $rec['email'][0] : $rec['email'];
	return mb_strtolower($str);
	}

	/**
	* Return the cache table columns to order by
	*/
	private function _sort_columns()
	{
	$sortcols = array();

	switch ($this->sort_col) {
	case 'name':
	$sortcols[] = 'name';
	case 'firstname':
	$sortcols[] = 'firstname';
	break;

	case 'surname':
	$sortcols[] = 'surname';
	break;
	}

	$sortcols[] = 'email';
	return $sortcols;
	}

	/**
	* Read distribution-lists AKA groups from server
	*/
	private function _fetch_groups($with_contacts = false)
	{
	if (!isset($this->distlists)) {
	$this->distlists = $this->groupmembers = array();
	foreach ($this->storagefolder->get_objects('distribution-list') as $record) {
	$record['ID'] = $this->uid2id($record['uid']);
	foreach ((array)$record['member'] as $i => $member) {
	$mid = $this->uid2id($member['uid'] ? $member['uid'] : 'mailto:' . $member['email']);
	$record['member'][$i]['ID'] = $mid;
	$record['member'][$i]['readonly'] = empty($member['uid']);
	$this->groupmembers[$mid][] = $record['ID'];

	if ($with_contacts && empty($member['uid']))
	$this->contacts[$mid] = $record['member'][$i];
	}
	$this->distlists[$record['ID']] = $record;
	}
	}
	}

	/**
	* Encode object UID into a safe identifier
	*/
	public function uid2id($uid)
	{
	return rtrim(strtr(base64_encode($uid), '+/', '-_'), '=');
	}

	/**
	* Convert Roundcube object identifier back into the original UID
	*/
	public function id2uid($id)
	{
	return base64_decode(str_pad(strtr($id, '-_', '+/'), strlen($id) % 4, '=', STR_PAD_RIGHT));
	}

	/**
	* Build SQL query for fulltext matches
	*/
	private function _search_query($fields, $value, $mode)
	{
	$query = array();
	$cols = array();

	// $fulltext_cols might contain composite field names e.g. 'email:address' while $fields not
	foreach (kolab_format_contact::$fulltext_cols as $col) {
	if ($pos = strpos($col, ':')) {
	$col = substr($col, 0, $pos);
	}
	if (in_array($col, $fields)) {
	$cols[] = $col;
	}
	}

	if (count($cols) == count($fields)) {
	switch ($mode) {
	case 1: $prefix = '^'; $suffix = '$'; break; // strict
	case 2: $prefix = '^'; $suffix = ''; break; // prefix
	default: $prefix = ''; $suffix = ''; break; // substring
	}

	$search_string = is_array($value) ? join(' ', $value) : $value;
	foreach (rcube_utils::normalize_string($search_string, true) as $word) {
	$query[] = array('words', 'LIKE', $prefix . $word . $suffix);
	}
	}

	return $query;
	}

	/**
	* Map fields from internal Kolab_Format to Roundcube contact format
	*/
	private function _to_rcube_contact($record)
	{
	$record['ID'] = $this->uid2id($record['uid']);

	// convert email, website, phone values
	foreach (array('email'=>'address', 'website'=>'url', 'phone'=>'number') as $col => $propname) {
	if (is_array($record[$col])) {
	$values = $record[$col];
	unset($record[$col]);
	foreach ((array)$values as $i => $val) {
	$key = $col . ($val['type'] ? ':' . $val['type'] : '');
	$record[$key][] = $val[$propname];
	}
	}
	}

	if (is_array($record['address'])) {
	$addresses = $record['address'];
	unset($record['address']);
	foreach ($addresses as $i => $adr) {
	$key = 'address' . ($adr['type'] ? ':' . $adr['type'] : '');
	$record[$key][] = array(
	'street' => $adr['street'],
	'locality' => $adr['locality'],
	'zipcode' => $adr['code'],
	'region' => $adr['region'],
	'country' => $adr['country'],
	);
	}
	}

	// photo is stored as separate attachment
	if ($record['photo'] && strlen($record['photo']) < 255 && ($att = $record['_attachments'][$record['photo']])) {
	// only fetch photo content if requested
	if ($this->action == 'photo')
	$record['photo'] = $att['content'] ? $att['content'] : $this->storagefolder->get_attachment($record['uid'], $att['id']);
	}

	// truncate publickey value for display
	if ($record['pgppublickey'] && $this->action == 'show')
	$record['pgppublickey'] = substr($record['pgppublickey'], 0, 140) . '...';

	// remove empty fields
	$record = array_filter($record);

	// remove kolab_storage internal data
	unset($record['_msguid'], $record['_formatobj'], $record['_mailbox'], $record['_type'], $record['_size']);

	return $record;
	}

	/**
	* Map fields from Roundcube format to internal kolab_format_contact properties
	*/
	private function _from_rcube_contact($contact, $old = array())
	{
	if (!$contact['uid'] && $contact['ID'])
	$contact['uid'] = $this->id2uid($contact['ID']);
	else if (!$contact['uid'] && $old['uid'])
	$contact['uid'] = $old['uid'];

	$contact['im'] = array_filter($this->get_col_values('im', $contact, true));

	// convert email, website, phone values
	foreach (array('email'=>'address', 'website'=>'url', 'phone'=>'number') as $col => $propname) {
	$col_values = $this->get_col_values($col, $contact);
	$contact[$col] = array();
	foreach ($col_values as $type => $values) {
	foreach ((array)$values as $val) {
	if (!empty($val)) {
	$contact[$col][] = array($propname => $val, 'type' => $type);
	}
	}
	unset($contact[$col.':'.$type]);
	}
	}

	$addresses = array();
	foreach ($this->get_col_values('address', $contact) as $type => $values) {
	foreach ((array)$values as $adr) {
	// skip empty address
	$adr = array_filter($adr);
	if (empty($adr))
	continue;

	$addresses[] = array(
	'type' => $type,
	'street' => $adr['street'],
	'locality' => $adr['locality'],
	'code' => $adr['zipcode'],
	'region' => $adr['region'],
	'country' => $adr['country'],
	);
	}

	unset($contact['address:'.$type]);
	}

	$contact['address'] = $addresses;

	// categories are not supported in the web client but should be preserved (#2608)
	$contact['categories'] = $old['categories'];

	// copy meta data (starting with _) from old object
	foreach ((array)$old as $key => $val) {
	if (!isset($contact[$key]) && $key[0] == '_')
	$contact[$key] = $val;
	}

	// convert one-item-array elements into string element
	// this is needed e.g. to properly import birthday field
	foreach ($this->coltypes as $type => $col_def) {
	if ($col_def['limit'] == 1 && is_array($contact[$type])) {
	$contact[$type] = array_shift(array_filter($contact[$type]));
	}
	}

	// When importing contacts 'vcard' data is added, we don't need it (Bug #1711)
	unset($contact['vcard']);

	// add empty values for some fields which can be removed in the UI
	return array_filter($contact) + array('nickname' => '', 'birthday' => '', 'anniversary' => '', 'freebusyurl' => '', 'photo' => $contact['photo']);
	}

	}
	diff --git a/plugins/kolab_files/lib/kolab_files_engine.php b/plugins/kolab_files/lib/kolab_files_engine.php
	index 36f93abf..75011954 100644
	--- a/plugins/kolab_files/lib/kolab_files_engine.php
	+++ b/plugins/kolab_files/lib/kolab_files_engine.php
	@@ -1,1180 +1,1186 @@
	<?php

	/**
	* Kolab files storage engine
	*
	* @version @package_version@
	* @author Aleksander Machniak <machniak@kolabsys.com>
	*
	* Copyright (C) 2013, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	class kolab_files_engine
	{
	private $plugin;
	private $rc;
	private $timeout = 600;
	private $sort_cols = array('name', 'mtime', 'size');

	const API_VERSION = 2;


	/**
	* Class constructor
	*/
	public function __construct($plugin, $url)
	{
	$this->url = rcube_utils::resolve_url($url);
	$this->plugin = $plugin;
	$this->rc = $plugin->rc;
	$this->timeout = $this->rc->config->get('session_lifetime') * 60;
	}

	/**
	* User interface initialization
	*/
	public function ui()
	{
	$this->plugin->add_texts('localization/');

	// set templates of Files UI and widgets
	if ($this->rc->task == 'mail') {
	if ($this->rc->action == 'compose') {
	$template = 'compose_plugin';
	}
	else if (in_array($this->rc->action, array('show', 'preview', 'get'))) {
	$template = 'message_plugin';

	if ($this->rc->action == 'get') {
	// add "Save as" button into attachment toolbar
	$this->plugin->add_button(array(
	'id' => 'saveas',
	'name' => 'saveas',
	'type' => 'link',
	'onclick' => 'kolab_directory_selector_dialog()',
	'class' => 'button buttonPas saveas',
	'classact' => 'button saveas',
	'label' => 'kolab_files.save',
	'title' => 'kolab_files.saveto',
	), 'toolbar');
	}
	else {
	// add "Save as" button into attachment menu
	$this->plugin->add_button(array(
	'id' => 'attachmenusaveas',
	'name' => 'attachmenusaveas',
	'type' => 'link',
	'wrapper' => 'li',
	'onclick' => 'return false',
	'class' => 'icon active saveas',
	'classact' => 'icon active saveas',
	'innerclass' => 'icon active saveas',
	'label' => 'kolab_files.saveto',
	), 'attachmentmenu');
	}
	}

	$this->plugin->add_label('save', 'cancel', 'saveto',
	'saveall', 'fromcloud', 'attachsel', 'selectfiles', 'attaching',
	'collection_audio', 'collection_video', 'collection_image', 'collection_document',
	'folderauthtitle', 'authenticating'
	);
	}
	else if ($this->rc->task == 'files') {
	$template = 'files';

	// get list of external sources
	$this->get_external_storage_drivers();
	}

	// add taskbar button
	if (empty($_REQUEST['framed'])) {
	$this->plugin->add_button(array(
	'command' => 'files',
	'class' => 'button-files',
	'classsel' => 'button-files button-selected',
	'innerclass' => 'button-inner',
	'label' => 'kolab_files.files',
	), 'taskbar');
	}

	$this->plugin->include_stylesheet($this->plugin->local_skin_path().'/style.css');

	if (!empty($template)) {
	$this->plugin->include_script($this->url . '/js/files_api.js');
	$this->plugin->include_script('kolab_files.js');
	$this->rc->output->set_env('files_url', $this->url . '/api/');
	$this->rc->output->set_env('files_token', $this->get_api_token());

	// register template objects for dialogs (and main interface)
	$this->rc->output->add_handlers(array(
	'folder-create-form' => array($this, 'folder_create_form'),
	'folder-edit-form' => array($this, 'folder_edit_form'),
	'folder-mount-form' => array($this, 'folder_mount_form'),
	'folder-auth-options'=> array($this, 'folder_auth_options'),
	'file-search-form' => array($this, 'file_search_form'),
	'file-edit-form' => array($this, 'file_edit_form'),
	'filelist' => array($this, 'file_list'),
	'filequotadisplay' => array($this, 'quota_display'),
	));

	if ($this->rc->task != 'files') {
	// add dialog content at the end of page body
	$this->rc->output->add_footer(
	$this->rc->output->parse('kolab_files.' . $template, false, false));
	}
	}
	}

	/**
	* Engine actions handler
	*/
	public function actions()
	{
	if ($this->rc->task == 'files' && $this->rc->action) {
	$action = $this->rc->action;
	}
	else if ($this->rc->task != 'files' && $_POST['act']) {
	$action = $_POST['act'];
	}
	else {
	$action = 'index';
	}

	$method = 'action_' . str_replace('-', '_', $action);

	if (method_exists($this, $method)) {
	$this->plugin->add_texts('localization/');
	$this->{$method}();
	}
	}

	/**
	* Template object for folder creation form
	*/
	public function folder_create_form($attrib)
	{
	$attrib['name'] = 'folder-create-form';
	if (empty($attrib['id'])) {
	$attrib['id'] = 'folder-create-form';
	}

	$input_name = new html_inputfield(array('id' => 'folder-name', 'name' => 'name', 'size' => 30));
	$select_parent = new html_select(array('id' => 'folder-parent', 'name' => 'parent'));
	$table = new html_table(array('cols' => 2, 'class' => 'propform'));

	$table->add('title', html::label('folder-name', rcube::Q($this->plugin->gettext('foldername'))));
	$table->add(null, $input_name->show());
	$table->add('title', html::label('folder-parent', rcube::Q($this->plugin->gettext('folderinside'))));
	$table->add(null, $select_parent->show());

	$out = $table->show();

	// add form tag around text field
	if (empty($attrib['form'])) {
	$out = $this->rc->output->form_tag($attrib, $out);
	}

	$this->plugin->add_label('foldercreating', 'foldercreatenotice', 'create', 'foldercreate', 'cancel');
	$this->rc->output->add_gui_object('folder-create-form', $attrib['id']);

	return $out;
	}

	/**
	* Template object for folder editing form
	*/
	public function folder_edit_form($attrib)
	{
	$attrib['name'] = 'folder-edit-form';
	if (empty($attrib['id'])) {
	$attrib['id'] = 'folder-edit-form';
	}

	$input_name = new html_inputfield(array('id' => 'folder-edit-name', 'name' => 'name', 'size' => 30));
	$select_parent = new html_select(array('id' => 'folder-edit-parent', 'name' => 'parent'));
	$table = new html_table(array('cols' => 2, 'class' => 'propform'));

	$table->add('title', html::label('folder-name', rcube::Q($this->plugin->gettext('foldername'))));
	$table->add(null, $input_name->show());
	$table->add('title', html::label('folder-parent', rcube::Q($this->plugin->gettext('folderinside'))));
	$table->add(null, $select_parent->show());

	$out = $table->show();

	// add form tag around text field
	if (empty($attrib['form'])) {
	$out = $this->rc->output->form_tag($attrib, $out);
	}

	$this->plugin->add_label('folderupdating', 'folderupdatenotice', 'save', 'folderedit', 'cancel');
	$this->rc->output->add_gui_object('folder-edit-form', $attrib['id']);

	return $out;
	}

	/**
	* Template object for folder mounting form
	*/
	public function folder_mount_form($attrib)
	{
	$sources = $this->rc->output->get_env('external_sources');

	if (empty($sources) \|\| !is_array($sources)) {
	return '';
	}

	$attrib['name'] = 'folder-mount-form';
	if (empty($attrib['id'])) {
	$attrib['id'] = 'folder-mount-form';
	}

	// build form content
	$table = new html_table(array('cols' => 2, 'class' => 'propform'));
	$input_name = new html_inputfield(array('id' => 'folder-mount-name', 'name' => 'name', 'size' => 30));
	$input_driver = new html_radiobutton(array('name' => 'driver', 'size' => 30));

	$table->add('title', html::label('folder-mount-name', rcube::Q($this->plugin->gettext('name'))));
	$table->add(null, $input_name->show());

	foreach ($sources as $key => $source) {
	$id = 'source-' . $key;
	$form = new html_table(array('cols' => 2, 'class' => 'propform driverform'));

	foreach ((array) $source['form'] as $idx => $label) {
	$iid = $id . '-' . $idx;
	$type = stripos($idx, 'pass') !== false ? 'html_passwordfield' : 'html_inputfield';
	$input = new $type(array('size' => 30));

	$form->add('title', html::label($iid, rcube::Q($label)));
	$form->add(null, $input->show('', array(
	'id' => $iid,
	'name' => $key . '[' . $idx . ']'
	)));
	}

	$row = $input_driver->show(null, array('value' => $key))
	. html::img(array('src' => $source['image'], 'alt' => $key, 'title' => $source['name']))
	. html::div(null, html::span('name', rcube::Q($source['name']))
	. html::br()
	. html::span('description', rcube::Q($source['description']))
	. $form->show()
	);

	$table->add(array('id' => $id, 'colspan' => 2, 'class' => 'source'), $row);
	}

	$out = $table->show() . $this->folder_auth_options(array('suffix' => '-form'));

	// add form tag around text field
	if (empty($attrib['form'])) {
	$out = $this->rc->output->form_tag($attrib, $out);
	}

	$this->plugin->add_label('foldermounting', 'foldermountnotice', 'foldermount',
	'save', 'cancel', 'folderauthtitle', 'authenticating'
	);
	$this->rc->output->add_gui_object('folder-mount-form', $attrib['id']);

	return $out;
	}

	/**
	* Template object for folder authentication options
	*/
	public function folder_auth_options($attrib)
	{
	$checkbox = new html_checkbox(array(
	'name' => 'store_passwords',
	'value' => '1',
	'id' => 'auth-pass-checkbox' . $attrib['suffix'],
	));

	return html::div('auth-options', $checkbox->show(). ' '
	. html::label('auth-pass-checkbox' . $attrib['suffix'], $this->plugin->gettext('storepasswords'))
	. html::span('description', $this->plugin->gettext('storepasswordsdesc'))
	);
	}

	/**
	* Template object for file_edit form
	*/
	public function file_edit_form($attrib)
	{
	$attrib['name'] = 'file-edit-form';
	if (empty($attrib['id'])) {
	$attrib['id'] = 'file-edit-form';
	}

	$input_name = new html_inputfield(array('id' => 'file-name', 'name' => 'name', 'size' => 30));
	$table = new html_table(array('cols' => 2, 'class' => 'propform'));

	$table->add('title', html::label('file-name', rcube::Q($this->plugin->gettext('filename'))));
	$table->add(null, $input_name->show());

	$out = $table->show();

	// add form tag around text field
	if (empty($attrib['form'])) {
	$out = $this->rc->output->form_tag($attrib, $out);
	}

	$this->plugin->add_label('save', 'cancel', 'fileupdating', 'fileedit');
	$this->rc->output->add_gui_object('file-edit-form', $attrib['id']);

	return $out;
	}

	/**
	* Template object for file search form in "From cloud" dialog
	*/
	public function file_search_form($attrib)
	{
	$attrib['name'] = '_q';

	if (empty($attrib['id'])) {
	$attrib['id'] = 'filesearchbox';
	}
	if ($attrib['type'] == 'search' && !$this->rc->output->browser->khtml) {
	unset($attrib['type'], $attrib['results']);
	}

	$input_q = new html_inputfield($attrib);
	$out = $input_q->show();

	// add some labels to client
	$this->rc->output->add_label('searching');
	$this->rc->output->add_gui_object('filesearchbox', $attrib['id']);

	// add form tag around text field
	if (empty($attrib['form'])) {
	$out = $this->rc->output->form_tag(array(
	'action' => '?_task=files',
	'name' => "filesearchform",
	'onsubmit' => rcmail_output::JS_OBJECT_NAME . ".command('files-search'); return false",
	), $out);
	}

	return $out;
	}

	/**
	* Template object for files list
	*/
	public function file_list($attrib)
	{
	// define list of cols to be displayed based on parameter or config
	if (empty($attrib['columns'])) {
	$list_cols = $this->rc->config->get('kolab_files_list_cols');
	$dont_override = $this->rc->config->get('dont_override');
	$a_show_cols = is_array($list_cols) ? $list_cols : array('name');
	$this->rc->output->set_env('col_movable', !in_array('kolab_files_list_cols', (array)$dont_override));
	}
	else {
	- $a_show_cols = preg_split('/[\s,;]+/', strip_quotes($attrib['columns']));
	+ $columns = str_replace(array("'", '"'), '', $attrib['columns']);
	+ $a_show_cols = preg_split('/[\s,;]+/', $columns);
	}

	// make sure 'name' and 'options' column is present
	if (!in_array('name', $a_show_cols)) {
	array_unshift($a_show_cols, 'name');
	}
	if (!in_array('options', $a_show_cols)) {
	array_unshift($a_show_cols, 'options');
	}

	$attrib['columns'] = $a_show_cols;

	// save some variables for use in ajax list
	$_SESSION['kolab_files_list_attrib'] = $attrib;

	// For list in dialog(s) remove all option-like columns
	if ($this->rc->task != 'files') {
	$a_show_cols = array_intersect($a_show_cols, $this->sort_cols);
	}

	// set default sort col/order to session
	if (!isset($_SESSION['kolab_files_sort_col']))
	$_SESSION['kolab_files_sort_col'] = $this->rc->config->get('kolab_files_sort_col') ?: 'name';
	if (!isset($_SESSION['kolab_files_sort_order']))
	$_SESSION['kolab_files_sort_order'] = strtoupper($this->rc->config->get('kolab_files_sort_order') ?: 'asc');

	// set client env
	$this->rc->output->add_gui_object('filelist', $attrib['id']);
	$this->rc->output->set_env('sort_col', $_SESSION['kolab_files_sort_col']);
	$this->rc->output->set_env('sort_order', $_SESSION['kolab_files_sort_order']);
	$this->rc->output->set_env('coltypes', $a_show_cols);
	$this->rc->output->set_env('search_threads', $this->rc->config->get('kolab_files_search_threads'));

	$this->rc->output->include_script('list.js');

	// attach css rules for mimetype icons
	$this->plugin->include_stylesheet($this->url . '/skins/default/images/mimetypes/style.css');

	$thead = '';
	foreach ($this->file_list_head($attrib, $a_show_cols) as $cell) {
	$thead .= html::tag('th', array('class' => $cell['className'], 'id' => $cell['id']), $cell['html']);
	}

	return html::tag('table', $attrib,
	html::tag('thead', null, html::tag('tr', null, $thead)) . html::tag('tbody', null, ''),
	array('style', 'class', 'id', 'cellpadding', 'cellspacing', 'border', 'summary'));
	}

	/**
	* Creates <THEAD> for message list table
	*/
	protected function file_list_head($attrib, $a_show_cols)
	{
	$skin_path = $_SESSION['skin_path'];
	// $image_tag = html::img(array('src' => "%s%s", 'alt' => "%s"));

	// check to see if we have some settings for sorting
	$sort_col = $_SESSION['kolab_files_sort_col'];
	$sort_order = $_SESSION['kolab_files_sort_order'];

	$dont_override = (array)$this->rc->config->get('dont_override');
	$disabled_sort = in_array('message_sort_col', $dont_override);
	$disabled_order = in_array('message_sort_order', $dont_override);

	$this->rc->output->set_env('disabled_sort_col', $disabled_sort);
	$this->rc->output->set_env('disabled_sort_order', $disabled_order);

	// define sortable columns
	if ($disabled_sort)
	$a_sort_cols = $sort_col && !$disabled_order ? array($sort_col) : array();
	else
	$a_sort_cols = $this->sort_cols;

	if (!empty($attrib['optionsmenuicon'])) {
	$onclick = 'return ' . JS_OBJECT_NAME . ".command('menu-open', 'filelistmenu', this, event)";
	$inner = $this->rc->gettext('listoptions');

	if (is_string($attrib['optionsmenuicon']) && $attrib['optionsmenuicon'] != 'true') {
	$inner = html::img(array('src' => $skin_path . $attrib['optionsmenuicon'], 'alt' => $this->rc->gettext('listoptions')));
	}

	$list_menu = html::a(array(
	'href' => '#list-options',
	'onclick' => $onclick,
	'class' => 'listmenu',
	'id' => 'listmenulink',
	'title' => $this->rc->gettext('listoptions'),
	'tabindex' => '0',
	), $inner);
	}
	else {
	$list_menu = '';
	}

	$cells = array();

	foreach ($a_show_cols as $col) {
	// get column name
	switch ($col) {
	/*
	case 'status':
	$col_name = '<span class="' . $col .'"> </span>';
	break;
	*/
	case 'options':
	$col_name = $list_menu;
	break;
	default:
	$col_name = rcube::Q($this->plugin->gettext($col));
	}

	// make sort links
	- if (in_array($col, $a_sort_cols))
	- $col_name = html::a(array('href'=>"#sort", 'onclick' => 'return '.JS_OBJECT_NAME.".command('files-sort','".$col."',this)", 'title' => rcube_label('sortby')), $col_name);
	+ if (in_array($col, $a_sort_cols)) {
	+ $col_name = html::a(array(
	+ 'href' => "#sort",
	+ 'onclick' => 'return '.JS_OBJECT_NAME.".command('files-sort','".$col."',this)",
	+ 'title' => $this->plugin->gettext('sortby')
	+ ), $col_name);
	+ }
	else if ($col_name[0] != '<')
	$col_name = '<span class="' . $col .'">' . $col_name . '</span>';

	$sort_class = $col == $sort_col && !$disabled_order ? " sorted$sort_order" : '';
	$class_name = $col.$sort_class;

	// put it all together
	$cells[] = array('className' => $class_name, 'id' => "rcm$col", 'html' => $col_name);
	}

	return $cells;
	}

	/**
	* Update files list object
	*/
	protected function file_list_update($prefs)
	{
	$attrib = $_SESSION['kolab_files_list_attrib'];

	if (!empty($prefs['kolab_files_list_cols'])) {
	$attrib['columns'] = $prefs['kolab_files_list_cols'];
	$_SESSION['kolab_files_list_attrib'] = $attrib;
	}

	$a_show_cols = $attrib['columns'];
	$head = '';

	foreach ($this->file_list_head($attrib, $a_show_cols) as $cell) {
	$head .= html::tag('td', array('class' => $cell['className'], 'id' => $cell['id']), $cell['html']);
	}

	$head = html::tag('tr', null, $head);

	$this->rc->output->set_env('coltypes', $a_show_cols);
	$this->rc->output->command('files_list_update', $head);
	}

	/**
	* Template object for file info box
	*/
	public function file_info_box($attrib)
	{
	// print_r($this->file_data, true);
	$table = new html_table(array('cols' => 2, 'class' => $attrib['class']));

	// file name
	$table->add('label', $this->plugin->gettext('name').':');
	$table->add('data filename', $this->file_data['name']);

	// file type
	// @TODO: human-readable type name
	$table->add('label', $this->plugin->gettext('type').':');
	$table->add('data filetype', $this->file_data['type']);

	// file size
	$table->add('label', $this->plugin->gettext('size').':');
	$table->add('data filesize', $this->rc->show_bytes($this->file_data['size']));

	// file modification time
	$table->add('label', $this->plugin->gettext('mtime').':');
	$table->add('data filemtime', $this->file_data['mtime']);

	// @TODO: for images: width, height, color depth, etc.
	// @TODO: for text files: count of characters, lines, words

	return $table->show();
	}

	/**
	* Template object for file preview frame
	*/
	public function file_preview_frame($attrib)
	{
	if (empty($attrib['id'])) {
	$attrib['id'] = 'filepreviewframe';
	}

	if ($frame = $this->file_data['viewer']['frame']) {
	return $frame;
	}

	if ($href = $this->file_data['viewer']['href']) {
	// file href attribute must be an absolute URL (Bug #2063)
	if (!empty($href)) {
	if (!preg_match('\|^https?://\|', $href)) {
	$href = $this->url . '/api/' . $href;
	}
	}
	}
	else {
	$token = $this->get_api_token();
	$href = $this->url . '/api/?method=file_get'
	. '&file=' . urlencode($this->file_data['filename'])
	. '&token=' . urlencode($token);
	}

	$this->rc->output->add_gui_object('preview_frame', $attrib['id']);

	$attrib['allowfullscreen'] = true;
	$attrib['src'] = $href;
	$attrib['onload'] = 'kolab_files_frame_load(this)';

	return html::iframe($attrib);
	}

	/**
	* Template object for quota display
	*/
	public function quota_display($attrib)
	{
	if (!$attrib['id']) {
	$attrib['id'] = 'rcmquotadisplay';
	}

	$quota_type = !empty($attrib['display']) ? $attrib['display'] : 'text';

	$this->rc->output->add_gui_object('quotadisplay', $attrib['id']);
	$this->rc->output->set_env('quota_type', $quota_type);

	// get quota
	$token = $this->get_api_token();
	$request = $this->get_request(array('method' => 'quota'), $token);

	// send request to the API
	try {
	$response = $request->send();
	$status = $response->getStatus();
	$body = @json_decode($response->getBody(), true);

	if ($status == 200 && $body['status'] == 'OK') {
	$quota = $body['result'];
	}
	else {
	throw new Exception($body['reason']);
	}
	}
	catch (Exception $e) {
	rcube::raise_error($e, true, false);
	$quota = array('total' => 0, 'percent' => 0);
	}

	$quota = rcube_output::json_serialize($quota);

	$this->rc->output->add_script(rcmail_output::JS_OBJECT_NAME . ".files_set_quota($quota);", 'docready');

	return html::span($attrib, '');
	}

	/**
	* Get API token for current user session, authenticate if needed
	*/
	public function get_api_token()
	{
	$token = $_SESSION['kolab_files_token'];
	$time = $_SESSION['kolab_files_time'];

	if ($token && time() - $this->timeout < $time) {
	if (time() - $time <= $this->timeout / 2) {
	return $token;
	}
	}

	$request = $this->get_request(array('method' => 'ping'), $token);

	try {
	$url = $request->getUrl();

	// Send ping request
	if ($token) {
	$url->setQueryVariables(array('method' => 'ping'));
	$request->setUrl($url);
	$response = $request->send();
	$status = $response->getStatus();

	if ($status == 200 && ($body = json_decode($response->getBody(), true))) {
	if ($body['status'] == 'OK') {
	$_SESSION['kolab_files_time'] = time();
	return $token;
	}
	}
	}

	// Go with authenticate request
	$url->setQueryVariables(array('method' => 'authenticate', 'version' => self::API_VERSION));
	$request->setUrl($url);
	$request->setAuth($this->rc->user->get_username(), $this->rc->decrypt($_SESSION['password']));
	$response = $request->send();
	$status = $response->getStatus();

	if ($status == 200 && ($body = json_decode($response->getBody(), true))) {
	$token = $body['result']['token'];

	if ($token) {
	$_SESSION['kolab_files_token'] = $token;
	$_SESSION['kolab_files_time'] = time();
	$_SESSION['kolab_files_caps'] = $body['result']['capabilities'];
	}
	}
	else {
	throw new Exception(sprintf("Authenticate error (Status: %d)", $status));
	}
	}
	catch (Exception $e) {
	rcube::raise_error($e, true, false);
	}

	return $token;
	}

	/**
	* Initialize HTTP_Request object
	*/
	protected function get_request($get = null, $token = null)
	{
	$url = $this->url . '/api/';

	if (!$this->request) {
	$config = array(
	'store_body' => true,
	'follow_redirects' => true,
	);

	$this->request = libkolab::http_request($url, 'GET', $config);
	}
	else {
	// cleanup
	try {
	$this->request->setBody('');
	$this->request->setUrl($url);
	$this->request->setMethod(HTTP_Request2::METHOD_GET);
	}
	catch (Exception $e) {
	rcube::raise_error($e, true, true);
	}
	}

	if ($token) {
	$this->request->setHeader('X-Session-Token', $token);
	}

	if (!empty($get)) {
	$url = $this->request->getUrl();
	$url->setQueryVariables($get);
	$this->request->setUrl($url);
	}

	// some HTTP server configurations require this header
	$this->request->setHeader('accept', "application/json,text/javascript,/");

	return $this->request;
	}

	/**
	* Handler for main files interface (Files task)
	*/
	protected function action_index()
	{
	$this->plugin->add_label(
	'folderdeleting', 'folderdeleteconfirm', 'folderdeletenotice',
	'uploading', 'attaching', 'uploadsizeerror',
	'filedeleting', 'filedeletenotice', 'filedeleteconfirm',
	'filemoving', 'filemovenotice', 'filemoveconfirm', 'filecopying', 'filecopynotice',
	'collection_audio', 'collection_video', 'collection_image', 'collection_document',
	'fileskip', 'fileskipall', 'fileoverwrite', 'fileoverwriteall'
	);

	$this->rc->output->add_label('uploadprogress', 'GB', 'MB', 'KB', 'B');
	$this->rc->output->set_pagetitle($this->plugin->gettext('files'));
	$this->rc->output->set_env('file_mimetypes', $this->get_mimetypes());
	$this->rc->output->set_env('files_quota', $_SESSION['kolab_files_caps']['QUOTA']);
	$this->rc->output->set_env('files_max_upload', $_SESSION['kolab_files_caps']['MAX_UPLOAD']);
	$this->rc->output->set_env('files_progress_name', $_SESSION['kolab_files_caps']['PROGRESS_NAME']);
	$this->rc->output->set_env('files_progress_time', $_SESSION['kolab_files_caps']['PROGRESS_TIME']);
	$this->rc->output->send('kolab_files.files');
	}

	/**
	* Handler for preferences save action
	*/
	protected function action_prefs()
	{
	$dont_override = (array)$this->rc->config->get('dont_override');
	$prefs = array();
	$opts = array(
	'kolab_files_sort_col' => true,
	'kolab_files_sort_order' => true,
	'kolab_files_list_cols' => false,
	);

	foreach ($opts as $o => $sess) {
	if (isset($_POST[$o]) && !in_array($o, $dont_override)) {
	$prefs[$o] = rcube_utils::get_input_value($o, rcube_utils::INPUT_POST);
	if ($sess) {
	$_SESSION[$o] = $prefs[$o];
	}

	if ($o == 'kolab_files_list_cols') {
	$update_list = true;
	}
	}
	}

	// save preference values
	if (!empty($prefs)) {
	$this->rc->user->save_prefs($prefs);
	}

	if (!empty($update_list)) {
	$this->file_list_update($prefs);
	}

	$this->rc->output->send();
	}

	/**
	* Handler for file open action
	*/
	protected function action_open()
	{
	$file = rcube_utils::get_input_value('file', rcube_utils::INPUT_GET);

	// get file info
	$token = $this->get_api_token();
	$request = $this->get_request(array(
	'method' => 'file_info',
	'file' => $file,
	'viewer' => !empty($_GET['viewer']),
	), $token);

	// send request to the API
	try {
	$response = $request->send();
	$status = $response->getStatus();
	$body = @json_decode($response->getBody(), true);

	if ($status == 200 && $body['status'] == 'OK') {
	$this->file_data = $body['result'];
	}
	else {
	throw new Exception($body['reason']);
	}
	}
	catch (Exception $e) {
	rcube::raise_error(array(
	'code' => 500, 'type' => 'php', 'line' => __LINE__, 'file' => __FILE__,
	'message' => $e->getMessage()),
	true, true);
	}

	$this->file_data['filename'] = $file;

	$this->plugin->add_label('filedeleteconfirm', 'filedeleting', 'filedeletenotice');

	// register template objects for dialogs (and main interface)
	$this->rc->output->add_handlers(array(
	'fileinfobox' => array($this, 'file_info_box'),
	'filepreviewframe' => array($this, 'file_preview_frame'),
	));

	// this one is for styling purpose
	$this->rc->output->set_env('extwin', true);
	$this->rc->output->set_env('file', $file);
	$this->rc->output->set_env('file_data', $this->file_data);
	$this->rc->output->set_pagetitle(rcube::Q($file));
	$this->rc->output->send('kolab_files.filepreview');
	}

	/**
	* Handler for "save all attachments into cloud" action
	*/
	protected function action_save_file()
	{
	// $source = rcube_utils::get_input_value('source', rcube_utils::INPUT_POST);
	$uid = rcube_utils::get_input_value('uid', rcube_utils::INPUT_POST);
	$dest = rcube_utils::get_input_value('dest', rcube_utils::INPUT_POST);
	$id = rcube_utils::get_input_value('id', rcube_utils::INPUT_POST);
	$name = rcube_utils::get_input_value('name', rcube_utils::INPUT_POST);

	$temp_dir = unslashify($this->rc->config->get('temp_dir'));
	$message = new rcube_message($uid);
	$request = $this->get_request();
	$url = $request->getUrl();
	$files = array();
	$errors = array();
	$attachments = array();

	$request->setMethod(HTTP_Request2::METHOD_POST);
	$request->setHeader('X-Session-Token', $this->get_api_token());
	$url->setQueryVariables(array('method' => 'file_upload', 'folder' => $dest));
	$request->setUrl($url);

	foreach ($message->attachments as $attach_prop) {
	if (empty($id) \|\| $id == $attach_prop->mime_id) {
	$filename = strlen($name) ? $name : rcmail_attachment_name($attach_prop, true);
	$attachments[$filename] = $attach_prop;
	}
	}

	// @TODO: handle error
	// @TODO: implement file upload using file URI instead of body upload

	foreach ($attachments as $attach_name => $attach_prop) {
	$path = tempnam($temp_dir, 'rcmAttmnt');

	// save attachment to file
	if ($fp = fopen($path, 'w+')) {
	$message->get_part_body($attach_prop->mime_id, false, 0, $fp);
	}
	else {
	$errors[] = true;
	rcube::raise_error(array(
	'code' => 500, 'type' => 'php', 'line' => __LINE__, 'file' => __FILE__,
	'message' => "Unable to save attachment into file $path"),
	true, false);
	continue;
	}

	fclose($fp);

	// send request to the API
	try {
	$request->setBody('');
	$request->addUpload('file[]', $path, $attach_name, $attach_prop->mimetype);
	$response = $request->send();
	$status = $response->getStatus();
	$body = @json_decode($response->getBody(), true);

	if ($status == 200 && $body['status'] == 'OK') {
	$files[] = $attach_name;
	}
	else {
	throw new Exception($body['reason']);
	}
	}
	catch (Exception $e) {
	unlink($path);
	$errors[] = $e->getMessage();
	rcube::raise_error(array(
	'code' => 500, 'type' => 'php', 'line' => __LINE__, 'file' => __FILE__,
	'message' => $e->getMessage()),
	true, false);
	continue;
	}

	// clean up
	unlink($path);
	$request->setBody('');
	}

	if ($count = count($files)) {
	$msg = $this->plugin->gettext(array('name' => 'saveallnotice', 'vars' => array('n' => $count)));
	$this->rc->output->show_message($msg, 'confirmation');
	}
	if ($count = count($errors)) {
	$msg = $this->plugin->gettext(array('name' => 'saveallerror', 'vars' => array('n' => $count)));
	$this->rc->output->show_message($msg, 'error');
	}

	// @TODO: update quota indicator, make this optional in case files aren't stored in IMAP

	$this->rc->output->send();
	}

	/**
	* Handler for "add attachments from the cloud" action
	*/
	protected function action_attach_file()
	{
	$files = rcube_utils::get_input_value('files', rcube_utils::INPUT_POST);
	$uploadid = rcube_utils::get_input_value('uploadid', rcube_utils::INPUT_POST);
	$COMPOSE_ID = rcube_utils::get_input_value('id', rcube_utils::INPUT_POST);
	$COMPOSE = null;
	$errors = array();

	if ($COMPOSE_ID && $_SESSION['compose_data_'.$COMPOSE_ID]) {
	$COMPOSE =& $_SESSION['compose_data_'.$COMPOSE_ID];
	}

	if (!$COMPOSE) {
	die("Invalid session var!");
	}

	// attachment upload action
	if (!is_array($COMPOSE['attachments'])) {
	$COMPOSE['attachments'] = array();
	}

	// clear all stored output properties (like scripts and env vars)
	$this->rc->output->reset();

	$temp_dir = unslashify($this->rc->config->get('temp_dir'));
	$request = $this->get_request();
	$url = $request->getUrl();

	// Use observer object to store HTTP response into a file
	require_once $this->plugin->home . DIRECTORY_SEPARATOR . 'lib' . DIRECTORY_SEPARATOR . 'kolab_files_observer.php';
	$observer = new kolab_files_observer();

	$request->setHeader('X-Session-Token', $this->get_api_token());

	// download files from the API and attach them
	foreach ($files as $file) {
	// decode filename
	$file = urldecode($file);

	// get file information
	try {
	$url->setQueryVariables(array('method' => 'file_info', 'file' => $file));
	$request->setUrl($url);
	$response = $request->send();
	$status = $response->getStatus();
	$body = @json_decode($response->getBody(), true);

	if ($status == 200 && $body['status'] == 'OK') {
	$file_params = $body['result'];
	}
	else {
	throw new Exception($body['reason']);
	}
	}
	catch (Exception $e) {
	$errors[] = $e->getMessage();
	rcube::raise_error(array(
	'code' => 500, 'type' => 'php', 'line' => __LINE__, 'file' => __FILE__,
	'message' => $e->getMessage()),
	true, false);
	continue;
	}

	// set location of downloaded file
	$path = tempnam($temp_dir, 'rcmAttmnt');
	$observer->set_file($path);

	// download file
	try {
	$url->setQueryVariables(array('method' => 'file_get', 'file' => $file));
	$request->setUrl($url);
	$request->attach($observer);
	$response = $request->send();
	$status = $response->getStatus();
	$response->getBody(); // returns nothing
	$request->detach($observer);

	if ($status != 200 \|\| !file_exists($path)) {
	throw new Exception("Unable to save file");
	}
	}
	catch (Exception $e) {
	$errors[] = $e->getMessage();
	rcube::raise_error(array(
	'code' => 500, 'type' => 'php', 'line' => __LINE__, 'file' => __FILE__,
	'message' => $e->getMessage()),
	true, false);
	continue;
	}

	$attachment = array(
	'path' => $path,
	'size' => $file_params['size'],
	'name' => $file_params['name'],
	'mimetype' => $file_params['type'],
	'group' => $COMPOSE_ID,
	);

	$attachment = $this->rc->plugins->exec_hook('attachment_save', $attachment);

	if ($attachment['status'] && !$attachment['abort']) {
	$id = $attachment['id'];

	// store new attachment in session
	unset($attachment['data'], $attachment['status'], $attachment['abort']);
	$COMPOSE['attachments'][$id] = $attachment;

	if (($icon = $COMPOSE['deleteicon']) && is_file($icon)) {
	$button = html::img(array(
	'src' => $icon,
	'alt' => $this->rc->gettext('delete')
	));
	}
	else {
	$button = rcube::Q($this->rc->gettext('delete'));
	}

	$content = html::a(array(
	'href' => "#delete",
	'onclick' => sprintf("return %s.command('remove-attachment','rcmfile%s', this)", JS_OBJECT_NAME, $id),
	'title' => $this->rc->gettext('delete'),
	'class' => 'delete',
	), $button);

	$content .= rcube::Q($attachment['name']);

	$this->rc->output->command('add2attachment_list', "rcmfile$id", array(
	'html' => $content,
	'name' => $attachment['name'],
	'mimetype' => $attachment['mimetype'],
	'classname' => rcmail_filetype2classname($attachment['mimetype'], $attachment['name']),
	'complete' => true), $uploadid);
	}
	else if ($attachment['error']) {
	$errors[] = $attachment['error'];
	}
	else {
	$errors[] = $this->plugin->gettext('attacherror');
	}
	}

	if (!empty($errors)) {
	$this->rc->output->command('display_message', $this->plugin->gettext('attacherror'), 'error');
	$this->rc->output->command('remove_from_attachment_list', $uploadid);
	}

	// send html page with JS calls as response
	$this->rc->output->command('auto_save_start', false);
	$this->rc->output->send();
	}

	/**
	* Returns mimetypes supported by File API viewers
	*/
	protected function get_mimetypes()
	{
	$token = $this->get_api_token();
	$request = $this->get_request(array('method' => 'mimetypes'), $token);

	// send request to the API
	try {
	$response = $request->send();
	$status = $response->getStatus();
	$body = @json_decode($response->getBody(), true);

	if ($status == 200 && $body['status'] == 'OK') {
	$mimetypes = $body['result'];
	}
	else {
	throw new Exception($body['reason']);
	}
	}
	catch (Exception $e) {
	rcube::raise_error(array(
	'code' => 500, 'type' => 'php', 'line' => __LINE__, 'file' => __FILE__,
	'message' => $e->getMessage()),
	true, false);
	}

	return $mimetypes;
	}

	/**
	* Get list of available external storage drivers
	*/
	protected function get_external_storage_drivers()
	{
	// first get configured sources from Chwala
	$token = $this->get_api_token();
	$request = $this->get_request(array('method' => 'folder_types'), $token);

	// send request to the API
	try {
	$response = $request->send();
	$status = $response->getStatus();
	$body = @json_decode($response->getBody(), true);

	if ($status == 200 && $body['status'] == 'OK') {
	$sources = $body['result'];
	}
	else {
	throw new Exception($body['reason']);
	}
	}
	catch (Exception $e) {
	rcube::raise_error($e, true, false);
	return;
	}

	$this->rc->output->set_env('external_sources', $sources);
	}
	}
	diff --git a/plugins/libcalendaring/lib/libcalendaring_itip.php b/plugins/libcalendaring/lib/libcalendaring_itip.php
	index a67a380f..f7feab3a 100644
	--- a/plugins/libcalendaring/lib/libcalendaring_itip.php
	+++ b/plugins/libcalendaring/lib/libcalendaring_itip.php
	@@ -1,817 +1,817 @@
	<?php

	/**
	* iTIP functions for the calendar-based Roudncube plugins
	*
	* Class providing functionality to manage iTIP invitations
	*
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* Copyright (C) 2011-2014, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/
	class libcalendaring_itip
	{
	protected $rc;
	protected $lib;
	protected $plugin;
	protected $sender;
	protected $domain;
	protected $itip_send = false;
	protected $rsvp_actions = array('accepted','tentative','declined','delegated');
	protected $rsvp_status = array('accepted','tentative','declined','delegated');

	function __construct($plugin, $domain = 'libcalendaring')
	{
	$this->plugin = $plugin;
	$this->rc = rcube::get_instance();
	$this->lib = libcalendaring::get_instance();
	$this->domain = $domain;

	$hook = $this->rc->plugins->exec_hook('calendar_load_itip',
	array('identity' => $this->rc->user->list_emails(true)));
	$this->sender = $hook['identity'];

	$this->plugin->add_hook('message_before_send', array($this, 'before_send_hook'));
	$this->plugin->add_hook('smtp_connect', array($this, 'smtp_connect_hook'));
	}

	public function set_sender_email($email)
	{
	if (!empty($email))
	$this->sender['email'] = $email;
	}

	public function set_rsvp_actions($actions)
	{
	$this->rsvp_actions = (array)$actions;
	$this->rsvp_status = array_merge($this->rsvp_actions, array('delegated'));
	}

	public function set_rsvp_status($status)
	{
	$this->rsvp_status = $status;
	}

	/**
	* Wrapper for rcube_plugin::gettext()
	* Checking for a label in different domains
	*
	* @see rcube::gettext()
	*/
	public function gettext($p)
	{
	$label = is_array($p) ? $p['name'] : $p;
	$domain = $this->domain;
	if (!$this->rc->text_exists($label, $domain)) {
	$domain = 'libcalendaring';
	}
	return $this->rc->gettext($p, $domain);
	}

	/**
	* Send an iTip mail message
	*
	* @param array Event object to send
	* @param string iTip method (REQUEST\|REPLY\|CANCEL)
	* @param array Hash array with recipient data (name, email)
	* @param string Mail subject
	* @param string Mail body text label
	* @param object Mail_mime object with message data
	* @param boolean Request RSVP
	* @return boolean True on success, false on failure
	*/
	public function send_itip_message($event, $method, $recipient, $subject, $bodytext, $message = null, $rsvp = true)
	{
	if (!$this->sender['name'])
	$this->sender['name'] = $this->sender['email'];

	if (!$message) {
	libcalendaring::identify_recurrence_instance($event);
	$message = $this->compose_itip_message($event, $method, $rsvp);
	}

	$mailto = rcube_idn_to_ascii($recipient['email']);

	$headers = $message->headers();
	$headers['To'] = format_email_recipient($mailto, $recipient['name']);
	$headers['Subject'] = $this->gettext(array(
	'name' => $subject,
	'vars' => array(
	'title' => $event['title'],
	'name' => $this->sender['name']
	)
	));

	// compose a list of all event attendees
	$attendees_list = array();
	foreach ((array)$event['attendees'] as $attendee) {
	$attendees_list[] = ($attendee['name'] && $attendee['email']) ?
	$attendee['name'] . ' <' . $attendee['email'] . '>' :
	($attendee['name'] ? $attendee['name'] : $attendee['email']);
	}

	$recurrence_info = '';
	if (!empty($event['recurrence_id'])) {
	$recurrence_info = "\n\n " . $this->gettext($event['thisandfuture'] ? 'itipmessagefutureoccurrence' : 'itipmessagesingleoccurrence') . ' ';
	}
	else if (!empty($event['recurrence'])) {
	$recurrence_info = sprintf("\n%s: %s", $this->gettext('recurring'), $this->lib->recurrence_text($event['recurrence']));
	}

	$mailbody = $this->gettext(array(
	'name' => $bodytext,
	'vars' => array(
	'title' => $event['title'],
	'date' => $this->lib->event_date_text($event, true) . $recurrence_info,
	'attendees' => join(",\n ", $attendees_list),
	'sender' => $this->sender['name'],
	'organizer' => $this->sender['name'],
	)
	));

	// if (!empty($event['comment'])) {
	// $mailbody .= "\n\n" . $this->gettext('itipsendercomment') . $event['comment'];
	// }

	// append links for direct invitation replies
	if ($method == 'REQUEST' && $rsvp && ($token = $this->store_invitation($event, $recipient['email']))) {
	$mailbody .= "\n\n" . $this->gettext(array(
	'name' => 'invitationattendlinks',
	'vars' => array('url' => $this->plugin->get_url(array('action' => 'attend', 't' => $token))),
	));
	}
	else if ($method == 'CANCEL' && $event['cancelled']) {
	$this->cancel_itip_invitation($event);
	}

	$message->headers($headers, true);
	$message->setTXTBody(rcube_mime::format_flowed($mailbody, 79));

	if ($this->rc->config->get('libcalendaring_itip_debug', false)) {
	console('iTip ' . $method, $message->txtHeaders() . "\n\r" . $message->get());
	}

	// finally send the message
	$this->itip_send = true;
	$sent = $this->rc->deliver_message($message, $headers['X-Sender'], $mailto, $smtp_error);
	$this->itip_send = false;

	return $sent;
	}

	/**
	* Plugin hook triggered by rcube::deliver_message() before delivering a message.
	* Here we can set the 'smtp_server' config option to '' in order to use
	* PHP's mail() function for unauthenticated email sending.
	*/
	public function before_send_hook($p)
	{
	if ($this->itip_send && !$this->rc->user->ID && $this->rc->config->get('calendar_itip_smtp_server', null) === '') {
	$this->rc->config->set('smtp_server', '');
	}

	return $p;
	}

	/**
	* Plugin hook to alter SMTP authentication.
	* This is used if iTip messages are to be sent from an unauthenticated session
	*/
	public function smtp_connect_hook($p)
	{
	// replace smtp auth settings if we're not in an authenticated session
	if ($this->itip_send && !$this->rc->user->ID) {
	foreach (array('smtp_server', 'smtp_user', 'smtp_pass') as $prop) {
	$p[$prop] = $this->rc->config->get("calendar_itip_$prop", $p[$prop]);
	}
	}

	return $p;
	}

	/**
	* Helper function to build a Mail_mime object to send an iTip message
	*
	* @param array Event object to send
	* @param string iTip method (REQUEST\|REPLY\|CANCEL)
	* @param boolean Request RSVP
	* @return object Mail_mime object with message data
	*/
	public function compose_itip_message($event, $method, $rsvp = true)
	{
	$from = rcube_idn_to_ascii($this->sender['email']);
	$from_utf = rcube_utils::idn_to_utf8($from);
	$sender = format_email_recipient($from, $this->sender['name']);

	// truncate list attendees down to the recipient of the iTip Reply.
	// constraints for a METHOD:REPLY according to RFC 5546
	if ($method == 'REPLY') {
	$replying_attendee = null;
	$reply_attendees = array();
	foreach ($event['attendees'] as $attendee) {
	if ($attendee['role'] == 'ORGANIZER') {
	$reply_attendees[] = $attendee;
	}
	else if (strcasecmp($attendee['email'], $from) == 0 \|\| strcasecmp($attendee['email'], $from_utf) == 0) {
	$replying_attendee = $attendee;
	if ($attendee['status'] != 'DELEGATED') {
	unset($replying_attendee['rsvp']); // unset the RSVP attribute
	}
	}
	// include attendees relevant for delegation (RFC 5546, Section 4.2.5)
	else if ((!empty($attendee['delegated-to']) &&
	(strcasecmp($attendee['delegated-to'], $from) == 0 \|\| strcasecmp($attendee['delegated-to'], $from_utf) == 0)) \|\|
	(!empty($attendee['delegated-from']) &&
	(strcasecmp($attendee['delegated-from'], $from) == 0 \|\| strcasecmp($attendee['delegated-from'], $from_utf) == 0))) {
	$reply_attendees[] = $attendee;
	}
	}
	if ($replying_attendee) {
	array_unshift($reply_attendees, $replying_attendee);
	$event['attendees'] = $reply_attendees;
	}
	if ($event['recurrence']) {
	unset($event['recurrence']['EXCEPTIONS']);
	}
	}
	// set RSVP for every attendee
	else if ($method == 'REQUEST') {
	foreach ($event['attendees'] as $i => $attendee) {
	if (($rsvp \|\| !isset($attendee['rsvp'])) && ($attendee['status'] != 'DELEGATED' && $attendee['role'] != 'NON-PARTICIPANT')) {
	$event['attendees'][$i]['rsvp']= (bool)$rsvp;
	}
	}
	}
	else if ($method == 'CANCEL') {
	if ($event['recurrence']) {
	unset($event['recurrence']['EXCEPTIONS']);
	}
	}

	// compose multipart message using PEAR:Mail_Mime
	$message = new Mail_mime("\r\n");
	$message->setParam('text_encoding', 'quoted-printable');
	$message->setParam('head_encoding', 'quoted-printable');
	$message->setParam('head_charset', RCMAIL_CHARSET);
	$message->setParam('text_charset', RCMAIL_CHARSET . ";\r\n format=flowed");
	$message->setContentType('multipart/alternative');

	// compose common headers array
	$headers = array(
	'From' => $sender,
	'Date' => $this->rc->user_date(),
	'Message-ID' => $this->rc->gen_message_id(),
	'X-Sender' => $from,
	);
	if ($agent = $this->rc->config->get('useragent')) {
	$headers['User-Agent'] = $agent;
	}

	$message->headers($headers);

	// attach ics file for this event
	$ical = libcalendaring::get_ical();
	$ics = $ical->export(array($event), $method, false, $method == 'REQUEST' && $this->plugin->driver ? array($this->plugin->driver, 'get_attachment_body') : false);
	$filename = $event['_type'] == 'task' ? 'todo.ics' : 'event.ics';
	$message->addAttachment($ics, 'text/calendar', $filename, false, '8bit', '', RCMAIL_CHARSET . "; method=" . $method);

	return $message;
	}

	/**
	* Forward the given iTip event as delegation to another person
	*
	* @param array Event object to delegate
	* @param mixed Delegatee as string or hash array with keys 'name' and 'mailto'
	* @param boolean The delegator's RSVP flag
	* @param array List with indexes of new/updated attendees
	* @return boolean True on success, False on failure
	*/
	public function delegate_to(&$event, $delegate, $rsvp = false, &$attendees = array())
	{
	if (is_string($delegate)) {
	$delegates = rcube_mime::decode_address_list($delegate, 1, false);
	if (count($delegates) > 0) {
	$delegate = reset($delegates);
	}
	}

	$emails = $this->lib->get_user_emails();
	$me = $this->rc->user->list_emails(true);

	// find/create the delegate attendee
	$delegate_attendee = array(
	'email' => $delegate['mailto'],
	'name' => $delegate['name'],
	'role' => 'REQ-PARTICIPANT',
	);
	$delegate_index = count($event['attendees']);

	foreach ($event['attendees'] as $i => $attendee) {
	// set myself the DELEGATED-TO parameter
	if ($attendee['email'] && in_array(strtolower($attendee['email']), $emails)) {
	$event['attendees'][$i]['delegated-to'] = $delegate['mailto'];
	$event['attendees'][$i]['status'] = 'DELEGATED';
	$event['attendees'][$i]['role'] = 'NON-PARTICIPANT';
	$event['attendees'][$i]['rsvp'] = $rsvp;

	$me['email'] = $attendee['email'];
	$delegate_attendee['role'] = $attendee['role'];
	}
	// the disired delegatee is already listed as an attendee
	else if (stripos($delegate['mailto'], $attendee['email']) !== false && $attendee['role'] != 'ORGANIZER') {
	$delegate_attendee = $attendee;
	$delegate_index = $i;
	break;
	}
	// TODO: remove previous delegatee (i.e. attendee that has DELEGATED-FROM == $me)
	}

	// set/add delegate attendee with RSVP=TRUE and DELEGATED-FROM parameter
	$delegate_attendee['rsvp'] = true;
	$delegate_attendee['status'] = 'NEEDS-ACTION';
	$delegate_attendee['delegated-from'] = $me['email'];
	$event['attendees'][$delegate_index] = $delegate_attendee;

	$attendees[] = $delegate_index;

	$this->set_sender_email($me['email']);
	return $this->send_itip_message($event, 'REQUEST', $delegate_attendee, 'itipsubjectdelegatedto', 'itipmailbodydelegatedto');
	}

	/**
	* Handler for calendar/itip-status requests
	*/
	public function get_itip_status($event, $existing = null)
	{
	$action = $event['rsvp'] ? 'rsvp' : '';
	$status = $event['fallback'];
	$latest = false;
	$html = '';

	if (is_numeric($event['changed']))
	$event['changed'] = new DateTime('@'.$event['changed']);

	// check if the given itip object matches the last state
	if ($existing) {
	$latest = (isset($event['sequence']) && intval($existing['sequence']) == intval($event['sequence'])) \|\|
	(!isset($event['sequence']) && $existing['changed'] && $existing['changed'] >= $event['changed']);
	}

	// determine action for REQUEST
	if ($event['method'] == 'REQUEST') {
	$html = html::div('rsvp-status', $this->gettext('acceptinvitation'));

	if ($existing) {
	$rsvp = $event['rsvp'];
	$emails = $this->lib->get_user_emails();
	foreach ($existing['attendees'] as $attendee) {
	if ($attendee['email'] && in_array(strtolower($attendee['email']), $emails)) {
	$status = strtoupper($attendee['status']);
	break;
	}
	}
	}
	else {
	$rsvp = $event['rsvp'] && $this->rc->config->get('calendar_allow_itip_uninvited', true);
	}

	$status_lc = strtolower($status);

	if ($status_lc == 'unknown' && !$this->rc->config->get('calendar_allow_itip_uninvited', true)) {
	$html = html::div('rsvp-status', $this->gettext('notanattendee'));
	$action = 'import';
	}
	else if (in_array($status_lc, $this->rsvp_status)) {
	$status_text = $this->gettext(($latest ? 'youhave' : 'youhavepreviously') . $status_lc);

	if ($existing && ($existing['sequence'] > $event['sequence'] \|\| (!isset($event['sequence']) && $existing['changed'] && $existing['changed'] > $event['changed']))) {
	$action = ''; // nothing to do here, outdated invitation
	if ($status_lc == 'needs-action')
	$status_text = $this->gettext('outdatedinvitation');
	}
	else if (!$existing && !$rsvp) {
	$action = 'import';
	}
	else if ($latest && $status_lc != 'needs-action') {
	$action = 'update';
	}

	$html = html::div('rsvp-status ' . $status_lc, $status_text);
	}
	}
	// determine action for REPLY
	else if ($event['method'] == 'REPLY') {
	// check whether the sender already is an attendee
	if ($existing) {
	$action = $this->rc->config->get('calendar_allow_itip_uninvited', true) ? 'accept' : '';
	$listed = false;
	foreach ($existing['attendees'] as $attendee) {
	if ($attendee['role'] != 'ORGANIZER' && strcasecmp($attendee['email'], $event['attendee']) == 0) {
	$status_lc = strtolower($status);
	if (in_array($status_lc, $this->rsvp_status)) {
	$html = html::div('rsvp-status ' . $status_lc, $this->gettext(array(
	'name' => 'attendee' . $status_lc,
	'vars' => array(
	'delegatedto' => Q($event['delegated-to'] ?: ($attendee['delegated-to'] ?: '?')),
	)
	)));
	}
	$action = $attendee['status'] == $status \|\| !$latest ? '' : 'update';
	$listed = true;
	break;
	}
	}

	if (!$listed) {
	$html = html::div('rsvp-status', $this->gettext('itipnewattendee'));
	}
	}
	else {
	$html = html::div('rsvp-status hint', $this->gettext('itipobjectnotfound'));
	$action = '';
	}
	}
	else if ($event['method'] == 'CANCEL') {
	if (!$existing) {
	$html = html::div('rsvp-status hint', $this->gettext('itipobjectnotfound'));
	$action = '';
	}
	}

	return array(
	'uid' => $event['uid'],
	'id' => asciiwords($event['uid'], true),
	'existing' => $existing ? true : false,
	'saved' => $existing ? true : false,
	'latest' => $latest,
	'status' => $status,
	'action' => $action,
	'html' => $html,
	);
	}

	/**
	* Build inline UI elements for iTip messages
	*/
	public function mail_itip_inline_ui($event, $method, $mime_id, $task, $message_date = null, $preview_url = null)
	{
	$buttons = array();
	$dom_id = asciiwords($event['uid'], true);
	$rsvp_status = 'unknown';

	// pass some metadata about the event and trigger the asynchronous status check
	$changed = is_object($event['changed']) ? $event['changed'] : $message_date;
	$metadata = array(
	'uid' => $event['uid'],
	'_instance' => $event['_instance'],
	'changed' => $changed ? $changed->format('U') : 0,
	'sequence' => intval($event['sequence']),
	'method' => $method,
	'task' => $task,
	);

	// create buttons to be activated from async request checking existence of this event in local calendars
	$buttons[] = html::div(array('id' => 'loading-'.$dom_id, 'class' => 'rsvp-status loading'), $this->gettext('loading'));

	// on iTip REPLY we have two options:
	if ($method == 'REPLY') {
	$title = $this->gettext('itipreply');

	foreach ($event['attendees'] as $attendee) {
	if (!empty($attendee['email']) && $attendee['role'] != 'ORGANIZER' &&
	(empty($event['_sender']) \|\| ($attendee['email'] == $event['_sender'] \|\| $attendee['email'] == $event['_sender_utf']))) {
	$metadata['attendee'] = $attendee['email'];
	$rsvp_status = strtoupper($attendee['status']);
	if ($attendee['delegated-to'])
	$metadata['delegated-to'] = $attendee['delegated-to'];
	break;
	}
	}

	// 1. update the attendee status on our copy
	$update_button = html::tag('input', array(
	'type' => 'button',
	'class' => 'button',
	'onclick' => "rcube_libcalendaring.add_from_itip_mail('" . JQ($mime_id) . "', '$task')",
	'value' => $this->gettext('updateattendeestatus'),
	));

	// 2. accept or decline a new or delegate attendee
	$accept_buttons = html::tag('input', array(
	'type' => 'button',
	'class' => "button accept",
	'onclick' => "rcube_libcalendaring.add_from_itip_mail('" . JQ($mime_id) . "', '$task')",
	'value' => $this->gettext('acceptattendee'),
	));
	$accept_buttons .= html::tag('input', array(
	'type' => 'button',
	'class' => "button decline",
	'onclick' => "rcube_libcalendaring.decline_attendee_reply('" . JQ($mime_id) . "', '$task')",
	'value' => $this->gettext('declineattendee'),
	));

	$buttons[] = html::div(array('id' => 'update-'.$dom_id, 'style' => 'display:none'), $update_button);
	$buttons[] = html::div(array('id' => 'accept-'.$dom_id, 'style' => 'display:none'), $accept_buttons);
	}
	// when receiving iTip REQUEST messages:
	else if ($method == 'REQUEST') {
	$emails = $this->lib->get_user_emails();
	$title = $event['sequence'] > 0 ? $this->gettext('itipupdate') : $this->gettext('itipinvitation');
	$metadata['rsvp'] = true;
	$metadata['sensitivity'] = $event['sensitivity'];

	if (is_object($event['start'])) {
	$metadata['date'] = $event['start']->format('U');
	}

	// check for X-KOLAB-INVITATIONTYPE property and only show accept/decline buttons
	if (self::get_custom_property($event, 'X-KOLAB-INVITATIONTYPE') == 'CONFIRMATION') {
	$this->rsvp_actions = array('accepted','declined');
	$metadata['nosave'] = true;
	}

	// 1. display RSVP buttons (if the user was invited)
	foreach ($this->rsvp_actions as $method) {
	$rsvp_buttons .= html::tag('input', array(
	'type' => 'button',
	'class' => "button $method",
	'onclick' => "rcube_libcalendaring.add_from_itip_mail('" . JQ($mime_id) . "', '$task', '$method', '$dom_id')",
	'value' => $this->gettext('itip' . $method),
	));
	}

	// add button to open calendar/preview
	if (!empty($preview_url)) {
	$msgref = $this->lib->ical_message->folder . '/' . $this->lib->ical_message->uid . '#' . $mime_id;
	$rsvp_buttons .= html::tag('input', array(
	'type' => 'button',
	'class' => "button preview",
	'onclick' => "rcube_libcalendaring.open_itip_preview('" . JQ($preview_url) . "', '" . JQ($msgref) . "')",
	'value' => $this->gettext('openpreview'),
	));
	}

	// 2. update the local copy with minor changes
	$update_button = html::tag('input', array(
	'type' => 'button',
	'class' => 'button',
	'onclick' => "rcube_libcalendaring.add_from_itip_mail('" . JQ($mime_id) . "', '$task')",
	'value' => $this->gettext('updatemycopy'),
	));

	// 3. Simply import the event without replying
	$import_button = html::tag('input', array(
	'type' => 'button',
	'class' => 'button',
	'onclick' => "rcube_libcalendaring.add_from_itip_mail('" . JQ($mime_id) . "', '$task')",
	'value' => $this->gettext('importtocalendar'),
	));

	// check my status
	foreach ($event['attendees'] as $attendee) {
	if ($attendee['email'] && in_array(strtolower($attendee['email']), $emails)) {
	$metadata['attendee'] = $attendee['email'];
	$metadata['rsvp'] = $attendee['rsvp'] \|\| $attendee['role'] != 'NON-PARTICIPANT';
	$rsvp_status = !empty($attendee['status']) ? strtoupper($attendee['status']) : 'NEEDS-ACTION';
	break;
	}
	}

	// add itip reply message controls
	$rsvp_buttons .= html::div('itip-reply-controls', $this->itip_rsvp_options_ui($dom_id, $metadata['nosave']));

	$buttons[] = html::div(array('id' => 'rsvp-'.$dom_id, 'class' => 'rsvp-buttons', 'style' => 'display:none'), $rsvp_buttons);
	$buttons[] = html::div(array('id' => 'update-'.$dom_id, 'style' => 'display:none'), $update_button);

	// prepare autocompletion for delegation dialog
	if (in_array('delegated', $this->rsvp_actions)) {
	$this->rc->autocomplete_init();
	}
	}
	// for CANCEL messages, we can:
	else if ($method == 'CANCEL') {
	$title = $this->gettext('itipcancellation');
	$event_prop = array_filter(array(
	'uid' => $event['uid'],
	'_instance' => $event['_instance'],
	'_savemode' => $event['_savemode'],
	));

	// 1. remove the event from our calendar
	$button_remove = html::tag('input', array(
	'type' => 'button',
	'class' => 'button',
	'onclick' => "rcube_libcalendaring.remove_from_itip(" . rcube_output::json_serialize($event_prop) . ", '$task', '" . JQ($event['title']) . "')",
	'value' => $this->gettext('removefromcalendar'),
	));

	// 2. update our copy with status=cancelled
	$button_update = html::tag('input', array(
	'type' => 'button',
	'class' => 'button',
	'onclick' => "rcube_libcalendaring.add_from_itip_mail('" . JQ($mime_id) . "', '$task')",
	'value' => $this->gettext('updatemycopy'),
	));

	$buttons[] = html::div(array('id' => 'rsvp-'.$dom_id, 'style' => 'display:none'), $button_remove . $button_update);

	$rsvp_status = 'CANCELLED';
	$metadata['rsvp'] = true;
	}

	// append generic import button
	if ($import_button) {
	$buttons[] = html::div(array('id' => 'import-'.$dom_id, 'style' => 'display:none'), $import_button);
	}

	// pass some metadata about the event and trigger the asynchronous status check
	$metadata['fallback'] = $rsvp_status;
	$metadata['rsvp'] = intval($metadata['rsvp']);

	- $this->rc->output->add_script("rcube_libcalendaring.fetch_itip_object_status(" . json_serialize($metadata) . ")", 'docready');
	+ $this->rc->output->add_script("rcube_libcalendaring.fetch_itip_object_status(" . rcube_output::json_serialize($metadata) . ")", 'docready');

	// get localized texts from the right domain
	foreach (array('savingdata','deleteobjectconfirm','declinedeleteconfirm','declineattendee',
	'cancel','itipdelegated','declineattendeeconfirm','itipcomment','delegateinvitation',
	'delegateto','delegatersvpme','delegateinvalidaddress') as $label) {
	$this->rc->output->command('add_label', "itip.$label", $this->gettext($label));
	}

	// show event details with buttons
	return $this->itip_object_details_table($event, $title) .
	html::div(array('class' => 'itip-buttons', 'id' => 'itip-buttons-' . asciiwords($metadata['uid'], true)), join('', $buttons));
	}

	/**
	* Render an RSVP UI widget with buttons to respond on iTip invitations
	*/
	function itip_rsvp_buttons($attrib = array(), $actions = null)
	{
	$attrib += array('type' => 'button');

	if (!$actions)
	$actions = $this->rsvp_actions;

	foreach ($actions as $method) {
	$buttons .= html::tag('input', array(
	'type' => $attrib['type'],
	'name' => $attrib['iname'],
	'class' => 'button',
	'rel' => $method,
	'value' => $this->gettext('itip' . $method),
	));
	}

	// add localized texts for the delegation dialog
	if (in_array('delegated', $actions)) {
	foreach (array('itipdelegated','itipcomment','delegateinvitation',
	'delegateto','delegatersvpme','delegateinvalidaddress','cancel') as $label) {
	$this->rc->output->command('add_label', "itip.$label", $this->gettext($label));
	}
	}

	foreach (array('all','current','future') as $mode) {
	$this->rc->output->command('add_label', "rsvpmode$mode", $this->gettext("rsvpmode$mode"));
	}

	$savemode_radio = new html_radiobutton(array('name' => '_rsvpmode', 'class' => 'rsvp-replymode'));

	return html::div($attrib,
	html::div('label', $this->gettext('acceptinvitation')) .
	html::div('rsvp-buttons',
	$buttons .
	html::div('itip-reply-controls', $this->itip_rsvp_options_ui($attrib['id']))
	)
	);
	}

	/**
	* Render UI elements to control iTip reply message sending
	*/
	public function itip_rsvp_options_ui($dom_id, $disable = false)
	{
	$itip_sending = $this->rc->config->get('calendar_itip_send_option', 3);

	// itip sending is entirely disabled
	if ($itip_sending === 0) {
	return '';
	}
	// add checkbox to suppress itip reply message
	else if ($itip_sending >= 2) {
	$rsvp_additions = html::label(array('class' => 'noreply-toggle'),
	html::tag('input', array('type' => 'checkbox', 'id' => 'noreply-'.$dom_id, 'value' => 1, 'disabled' => $disable, 'checked' => ($itip_sending & 1) == 0))
	. ' ' . $this->gettext('itipsuppressreply')
	);
	}

	// add input field for reply comment
	$rsvp_additions .= html::a(array('href' => '#toggle', 'class' => 'reply-comment-toggle'), $this->gettext('itipeditresponse'));
	$rsvp_additions .= html::div('itip-reply-comment',
	html::tag('textarea', array('id' => 'reply-comment-'.$dom_id, 'name' => '_comment', 'cols' => 40, 'rows' => 6, 'style' => 'display:none', 'placeholder' => $this->gettext('itipcomment')), '')
	);

	return $rsvp_additions;
	}

	/**
	* Render event/task details in a table
	*/
	function itip_object_details_table($event, $title)
	{
	$table = new html_table(array('cols' => 2, 'border' => 0, 'class' => 'calendar-eventdetails'));
	$table->add('ititle', $title);
	$table->add('title', Q($event['title']));
	if ($event['start'] && $event['end']) {
	$table->add('label', $this->gettext('date'));
	$table->add('date', Q($this->lib->event_date_text($event)));
	}
	else if ($event['due'] && $event['_type'] == 'task') {
	$table->add('label', $this->gettext('date'));
	$table->add('date', Q($this->lib->event_date_text($event)));
	}
	if (!empty($event['recurrence_date'])) {
	$table->add('label', '');
	$table->add('recurrence-id', $this->gettext($event['thisandfuture'] ? 'itipfutureoccurrence' : 'itipsingleoccurrence'));
	}
	else if (!empty($event['recurrence'])) {
	$table->add('label', $this->gettext('recurring'));
	$table->add('recurrence', $this->lib->recurrence_text($event['recurrence']));
	}
	if ($event['location']) {
	$table->add('label', $this->gettext('location'));
	$table->add('location', Q($event['location']));
	}
	if ($event['sensitivity'] && $event['sensitivity'] != 'public') {
	$table->add('label', $this->gettext('sensitivity'));
	$table->add('sensitivity', ucfirst($this->gettext($event['sensitivity'])) . '!');
	}
	if ($event['status'] == 'COMPLETED' \|\| $event['status'] == 'CANCELLED') {
	$table->add('label', $this->gettext('status'));
	$table->add('status', $this->gettext('status-' . strtolower($event['status'])));
	}
	if ($event['comment']) {
	$table->add('label', $this->gettext('comment'));
	$table->add('location', Q($event['comment']));
	}

	return $table->show();
	}


	/**
	* Create iTIP invitation token for later replies via URL
	*
	* @param array Hash array with event properties
	* @param string Attendee email address
	* @return string Invitation token
	*/
	public function store_invitation($event, $attendee)
	{
	// empty stub
	return false;
	}

	/**
	* Mark invitations for the given event as cancelled
	*
	* @param array Hash array with event properties
	*/
	public function cancel_itip_invitation($event)
	{
	// empty stub
	return false;
	}

	/**
	* Utility function to get the value of a custom property
	*/
	public static function get_custom_property($event, $name)
	{
	$ret = false;

	if (is_array($event['x-custom'])) {
	array_walk($event['x-custom'], function($prop, $i) use ($name, &$ret) {
	if (strcasecmp($prop[0], $name) === 0) {
	$ret = $prop[1];
	}
	});
	}

	return $ret;
	}

	}
	diff --git a/plugins/tasklist/tasklist_ui.php b/plugins/tasklist/tasklist_ui.php
	index 97b16334..307d4683 100644
	--- a/plugins/tasklist/tasklist_ui.php
	+++ b/plugins/tasklist/tasklist_ui.php
	@@ -1,540 +1,540 @@
	<?php
	/**
	* User Interface class for the Tasklist plugin
	*
	* @version @package_version@
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* Copyright (C) 2012-2015, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/


	class tasklist_ui
	{
	private $rc;
	private $plugin;
	private $ready = false;
	private $gui_objects = array();

	function __construct($plugin)
	{
	$this->plugin = $plugin;
	$this->rc = $plugin->rc;
	}

	/**
	* Calendar UI initialization and requests handlers
	*/
	public function init()
	{
	if ($this->ready) {
	return;
	}

	// add taskbar button
	$this->plugin->add_button(array(
	'command' => 'tasks',
	'class' => 'button-tasklist',
	'classsel' => 'button-tasklist button-selected',
	'innerclass' => 'button-inner',
	'label' => 'tasklist.navtitle',
	), 'taskbar');

	$this->plugin->include_stylesheet($this->plugin->local_skin_path() . '/tasklist.css');

	if ($this->rc->task == 'mail' \|\| $this->rc->task == 'tasks') {
	jqueryui::tagedit();

	$this->plugin->include_script('tasklist_base.js');

	// copy config to client
	$this->rc->output->set_env('tasklist_settings', $this->load_settings());

	// initialize attendees autocompletion
	$this->rc->autocomplete_init();
	}

	$this->ready = true;
	}

	/**
	*
	*/
	function load_settings()
	{
	$settings = array();

	$settings['invite_shared'] = (int)$this->rc->config->get('calendar_allow_invite_shared', 0);
	$settings['itip_notify'] = (int)$this->rc->config->get('calendar_itip_send_option', 3);
	$settings['sort_col'] = $this->rc->config->get('tasklist_sort_col', '');
	$settings['sort_order'] = $this->rc->config->get('tasklist_sort_order', 'asc');

	// get user identity to create default attendee
	foreach ($this->rc->user->list_emails() as $rec) {
	if (!$identity)
	$identity = $rec;

	$identity['emails'][] = $rec['email'];
	$settings['identities'][$rec['identity_id']] = $rec['email'];
	}

	$identity['emails'][] = $this->rc->user->get_username();
	$settings['identity'] = array(
	'name' => $identity['name'],
	'email' => strtolower($identity['email']),
	'emails' => ';' . strtolower(join(';', $identity['emails']))
	);

	if ($list = rcube_utils::get_input_value('_list', rcube_utils::INPUT_GPC)) {
	$settings['selected_list'] = $list;
	}
	if ($list && ($id = rcube_utils::get_input_value('_id', rcube_utils::INPUT_GPC))) {
	$settings['selected_id'] = $id;

	// check if the referenced task is completed
	$task = $this->plugin->driver->get_task(array('id' => $id, 'list' => $list));
	if ($task && $this->plugin->driver->is_complete($task)) {
	$settings['selected_filter'] = 'complete';
	}
	}
	else if ($filter = rcube_utils::get_input_value('_filter', rcube_utils::INPUT_GPC)) {
	$settings['selected_filter'] = $filter;
	}

	return $settings;
	}

	/**
	* Render a HTML select box for user identity selection
	*/
	function identity_select($attrib = array())
	{
	$attrib['name'] = 'identity';
	$select = new html_select($attrib);
	$identities = $this->rc->user->list_emails();

	foreach ($identities as $ident) {
	$select->add(format_email_recipient($ident['email'], $ident['name']), $ident['identity_id']);
	}

	return $select->show(null);
	}

	/**
	* Register handler methods for the template engine
	*/
	public function init_templates()
	{
	$this->plugin->register_handler('plugin.tasklists', array($this, 'tasklists'));
	$this->plugin->register_handler('plugin.tasklist_select', array($this, 'tasklist_select'));
	$this->plugin->register_handler('plugin.status_select', array($this, 'status_select'));
	$this->plugin->register_handler('plugin.searchform', array($this->rc->output, 'search_form'));
	$this->plugin->register_handler('plugin.quickaddform', array($this, 'quickadd_form'));
	$this->plugin->register_handler('plugin.tasks', array($this, 'tasks_resultview'));
	$this->plugin->register_handler('plugin.tagslist', array($this, 'tagslist'));
	$this->plugin->register_handler('plugin.tags_editline', array($this, 'tags_editline'));
	$this->plugin->register_handler('plugin.alarm_select', array($this, 'alarm_select'));
	$this->plugin->register_handler('plugin.recurrence_form', array($this->plugin->lib, 'recurrence_form'));
	$this->plugin->register_handler('plugin.attachments_form', array($this, 'attachments_form'));
	$this->plugin->register_handler('plugin.attachments_list', array($this, 'attachments_list'));
	$this->plugin->register_handler('plugin.filedroparea', array($this, 'file_drop_area'));
	$this->plugin->register_handler('plugin.attendees_list', array($this, 'attendees_list'));
	$this->plugin->register_handler('plugin.attendees_form', array($this, 'attendees_form'));
	$this->plugin->register_handler('plugin.identity_select', array($this, 'identity_select'));
	$this->plugin->register_handler('plugin.edit_attendees_notify', array($this, 'edit_attendees_notify'));
	$this->plugin->register_handler('plugin.task_rsvp_buttons', array($this->plugin->itip, 'itip_rsvp_buttons'));
	$this->plugin->register_handler('plugin.object_changelog_table', array('libkolab', 'object_changelog_table'));

	jqueryui::tagedit();

	$this->plugin->include_script('tasklist.js');
	$this->rc->output->include_script('treelist.js');

	// include kolab folderlist widget if available
	if (in_array('libkolab', $this->plugin->api->loaded_plugins())) {
	$this->plugin->api->include_script('libkolab/js/folderlist.js');
	$this->plugin->api->include_script('libkolab/js/audittrail.js');
	}
	}

	/**
	*
	*/
	public function tasklists($attrib = array())
	{
	$tree = true;
	$jsenv = array();
	$lists = $this->plugin->driver->get_lists($tree);

	// walk folder tree
	if (is_object($tree)) {
	$html = $this->list_tree_html($tree, $lists, $jsenv, $attrib);
	}
	else {
	// fall-back to flat folder listing
	$attrib['class'] .= ' flat';

	$html = '';
	foreach ((array)$lists as $id => $prop) {
	if ($attrib['activeonly'] && !$prop['active'])
	continue;

	$html .= html::tag('li', array(
	'id' => 'rcmlitasklist' . rcube_utils::html_identifier($id),
	'class' => $prop['group'],
	),
	$this->tasklist_list_item($id, $prop, $jsenv, $attrib['activeonly'])
	);
	}
	}

	$this->rc->output->set_env('tasklists', $jsenv);
	$this->register_gui_object('tasklistslist', $attrib['id']);

	return html::tag('ul', $attrib, $html, html::$common_attrib);
	}

	/**
	* Return html for a structured list <ul> for the folder tree
	*/
	public function list_tree_html($node, $data, &$jsenv, $attrib)
	{
	$out = '';
	foreach ($node->children as $folder) {
	$id = $folder->id;
	$prop = $data[$id];
	$is_collapsed = false; // TODO: determine this somehow?

	$content = $this->tasklist_list_item($id, $prop, $jsenv, $attrib['activeonly']);

	if (!empty($folder->children)) {
	$content .= html::tag('ul', array('style' => ($is_collapsed ? "display:none;" : null)),
	$this->list_tree_html($folder, $data, $jsenv, $attrib));
	}

	if (strlen($content)) {
	$out .= html::tag('li', array(
	'id' => 'rcmlitasklist' . rcube_utils::html_identifier($id),
	'class' => $prop['group'] . ($prop['virtual'] ? ' virtual' : ''),
	),
	$content);
	}
	}

	return $out;
	}

	/**
	* Helper method to build a tasklist item (HTML content and js data)
	*/
	public function tasklist_list_item($id, $prop, &$jsenv, $activeonly = false)
	{
	// enrich list properties with settings from the driver
	if (!$prop['virtual']) {
	unset($prop['user_id']);
	$prop['alarms'] = $this->plugin->driver->alarms;
	$prop['undelete'] = $this->plugin->driver->undelete;
	$prop['sortable'] = $this->plugin->driver->sortable;
	$prop['attachments'] = $this->plugin->driver->attachments;
	$prop['attendees'] = $this->plugin->driver->attendees;
	$prop['caldavurl'] = $this->plugin->driver->tasklist_caldav_url($prop);
	$jsenv[$id] = $prop;
	}

	$classes = array('tasklist');
	$title = $prop['title'] ?: ($prop['name'] != $prop['listname'] \|\| strlen($prop['name']) > 25 ?
	html_entity_decode($prop['name'], ENT_COMPAT, RCMAIL_CHARSET) : '');

	if ($prop['virtual'])
	$classes[] = 'virtual';
	else if (!$prop['editable'])
	$classes[] = 'readonly';
	if ($prop['subscribed'])
	$classes[] = 'subscribed';
	if ($prop['class'])
	$classes[] = $prop['class'];

	if (!$activeonly \|\| $prop['active']) {
	$label_id = 'tl:' . $id;
	return html::div(join(' ', $classes),
	html::span(array('class' => 'listname', 'title' => $title, 'id' => $label_id), $prop['listname'] ?: $prop['name']) .
	($prop['virtual'] ? '' :
	html::tag('input', array('type' => 'checkbox', 'name' => '_list[]', 'value' => $id, 'checked' => $prop['active'], 'aria-labelledby' => $label_id)) .
	html::span('actions',
	($prop['removable'] ? html::a(array('href' => '#', 'class' => 'remove', 'title' => $this->plugin->gettext('removelist')), ' ') : '') .
	html::a(array('href' => '#', 'class' => 'quickview', 'title' => $this->plugin->gettext('focusview'), 'role' => 'checkbox', 'aria-checked' => 'false'), ' ') .
	(isset($prop['subscribed']) ? html::a(array('href' => '#', 'class' => 'subscribed', 'title' => $this->plugin->gettext('tasklistsubscribe'), 'role' => 'checkbox', 'aria-checked' => $prop['subscribed'] ? 'true' : 'false'), ' ') : '')
	)
	)
	);
	}

	return '';
	}

	/**
	* Render HTML form for task status selector
	*/
	function status_select($attrib = array())
	{
	$attrib['name'] = 'status';
	$select = new html_select($attrib);
	$select->add('---', '');
	$select->add($this->plugin->gettext('status-needs-action'), 'NEEDS-ACTION');
	$select->add($this->plugin->gettext('status-in-process'), 'IN-PROCESS');
	$select->add($this->plugin->gettext('status-completed'), 'COMPLETED');
	$select->add($this->plugin->gettext('status-cancelled'), 'CANCELLED');

	return $select->show(null);
	}

	/**
	* Render a HTML select box for list selection
	*/
	function tasklist_select($attrib = array())
	{
	$attrib['name'] = 'list';
	$attrib['is_escaped'] = true;
	$select = new html_select($attrib);
	$default = null;

	foreach ((array)$this->plugin->driver->get_lists() as $id => $prop) {
	if ($prop['editable'] \|\| strpos($prop['rights'], 'i') !== false) {
	$select->add($prop['name'], $id);
	if (!$default \|\| $prop['default'])
	$default = $id;
	}
	}

	return $select->show($default);
	}


	function tasklist_editform($action, $list = array())
	{
	$fields = array(
	'name' => array(
	'id' => 'taskedit-tasklistame',
	'label' => $this->plugin->gettext('listname'),
	'value' => html::tag('input', array('id' => 'taskedit-tasklistame', 'name' => 'name', 'type' => 'text', 'class' => 'text', 'size' => 40)),
	),
	/*
	'color' => array(
	'id' => 'taskedit-color',
	'label' => $this->plugin->gettext('color'),
	'value' => html::tag('input', array('id' => 'taskedit-color', 'name' => 'color', 'type' => 'text', 'class' => 'text colorpicker', 'size' => 6)),
	),
	*/
	'showalarms' => array(
	'id' => 'taskedit-showalarms',
	'label' => $this->plugin->gettext('showalarms'),
	'value' => html::tag('input', array('id' => 'taskedit-showalarms', 'name' => 'color', 'type' => 'checkbox')),
	),
	);

	return html::tag('form', array('action' => "#", 'method' => "post", 'id' => 'tasklisteditform'),
	$this->plugin->driver->tasklist_edit_form($action, $list, $fields)
	);
	}

	/**
	* Render HTML form for alarm configuration
	*/
	function alarm_select($attrib = array())
	{
	return $this->plugin->lib->alarm_select($attrib, $this->plugin->driver->alarm_types, $this->plugin->driver->alarm_absolute);
	}

	/**
	*
	*/
	function quickadd_form($attrib)
	{
	$attrib += array('action' => $this->rc->url('add'), 'method' => 'post', 'id' => 'quickaddform');

	$label = html::label(array('for' => 'quickaddinput', 'class' => 'voice'), $this->plugin->gettext('quickaddinput'));
	$input = new html_inputfield(array('name' => 'text', 'id' => 'quickaddinput'));
	$button = html::tag('input', array('type' => 'submit', 'value' => '+', 'title' => $this->plugin->gettext('createtask'), 'class' => 'button mainaction'));

	$this->register_gui_object('quickaddform', $attrib['id']);
	return html::tag('form', $attrib, $label . $input->show() . $button);
	}

	/**
	* The result view
	*/
	function tasks_resultview($attrib)
	{
	$attrib += array('id' => 'rcmtaskslist');

	$this->register_gui_object('resultlist', $attrib['id']);

	unset($attrib['name']);
	return html::tag('ul', $attrib, '');
	}

	/**
	* Container for a tags cloud
	*/
	function tagslist($attrib)
	{
	$attrib += array('id' => 'rcmtasktagslist');
	unset($attrib['name']);

	$this->register_gui_object('tagslist', $attrib['id']);
	return html::tag('ul', $attrib, '');
	}

	/**
	* Interactive UI element to add/remove tags
	*/
	function tags_editline($attrib)
	{
	$attrib += array('id' => 'rcmtasktagsedit');
	$this->register_gui_object('edittagline', $attrib['id']);

	$input = new html_inputfield(array('name' => 'tags[]', 'class' => 'tag', 'size' => $attrib['size'], 'tabindex' => $attrib['tabindex']));
	unset($attrib['tabindex']);
	return html::div($attrib, $input->show(''));
	}

	/**
	* Generate HTML element for attachments list
	*/
	function attachments_list($attrib = array())
	{
	if (!$attrib['id'])
	$attrib['id'] = 'rcmtaskattachmentlist';

	$this->register_gui_object('attachmentlist', $attrib['id']);

	return html::tag('ul', $attrib, '', html::$common_attrib);
	}

	/**
	* Generate the form for event attachments upload
	*/
	function attachments_form($attrib = array())
	{
	// add ID if not given
	if (!$attrib['id'])
	$attrib['id'] = 'rcmtaskuploadform';

	// Get max filesize, enable upload progress bar
	- $max_filesize = rcube_upload_init();
	+ $max_filesize = $this->rc->upload_init();

	$button = new html_inputfield(array('type' => 'button'));
	$input = new html_inputfield(array(
	'type' => 'file',
	'name' => '_attachments[]',
	'multiple' => 'multiple',
	'size' => $attrib['attachmentfieldsize'],
	));

	return html::div($attrib,
	html::div(null, $input->show()) .
	- html::div('formbuttons', $button->show(rcube_label('upload'), array('class' => 'button mainaction',
	+ html::div('formbuttons', $button->show($this->gettext('upload'), array('class' => 'button mainaction',
	'onclick' => JS_OBJECT_NAME . ".upload_file(this.form)"))) .
	- html::div('hint', rcube_label(array('name' => 'maxuploadsize', 'vars' => array('size' => $max_filesize))))
	+ html::div('hint', $this->gettext(array('name' => 'maxuploadsize', 'vars' => array('size' => $max_filesize))))
	);
	}

	/**
	* Register UI object for HTML5 drag & drop file upload
	*/
	function file_drop_area($attrib = array())
	{
	if ($attrib['id']) {
	$this->register_gui_object('filedrop', $attrib['id']);
	$this->rc->output->set_env('filedrop', array('action' => 'upload', 'fieldname' => '_attachments'));
	}
	}

	/**
	*
	*/
	function attendees_list($attrib = array())
	{
	// add "noreply" checkbox to attendees table only
	$invitations = strpos($attrib['id'], 'attend') !== false;

	$invite = new html_checkbox(array('value' => 1, 'id' => 'edit-attendees-invite'));
	$table = new html_table(array('cols' => 4 + intval($invitations), 'border' => 0, 'cellpadding' => 0, 'class' => 'rectable'));

	// $table->add_header('role', $this->plugin->gettext('role'));
	$table->add_header('name', $this->plugin->gettext($attrib['coltitle'] ?: 'attendee'));
	$table->add_header('confirmstate', $this->plugin->gettext('confirmstate'));
	if ($invitations) {
	$table->add_header(array('class' => 'invite', 'title' => $this->plugin->gettext('sendinvitations')),
	$invite->show(1) . html::label('edit-attendees-invite', $this->plugin->gettext('sendinvitations')));
	}
	$table->add_header('options', '');

	// hide invite column if disabled by config
	$itip_notify = (int)$this->rc->config->get('calendar_itip_send_option', 3);
	if ($invitations && !($itip_notify & 2)) {
	$css = sprintf('#%s td.invite, #%s th.invite { display:none !important }', $attrib['id'], $attrib['id']);
	$this->rc->output->add_footer(html::tag('style', array('type' => 'text/css'), $css));
	}

	return $table->show($attrib);
	}

	/**
	*
	*/
	function attendees_form($attrib = array())
	{
	$input = new html_inputfield(array('name' => 'participant', 'id' => 'edit-attendee-name', 'size' => 30));
	$textarea = new html_textarea(array('name' => 'comment', 'id' => 'edit-attendees-comment',
	'rows' => 4, 'cols' => 55, 'title' => $this->plugin->gettext('itipcommenttitle')));

	return html::div($attrib,
	html::div(null, $input->show() . " " .
	html::tag('input', array('type' => 'button', 'class' => 'button', 'id' => 'edit-attendee-add', 'value' => $this->plugin->gettext('addattendee')))
	// . " " . html::tag('input', array('type' => 'button', 'class' => 'button', 'id' => 'edit-attendee-schedule', 'value' => $this->plugin->gettext('scheduletime').'...'))
	) .
	html::p('attendees-commentbox', html::label(null, $this->plugin->gettext('itipcomment') . $textarea->show()))
	);
	}

	/**
	*
	*/
	function edit_attendees_notify($attrib = array())
	{
	$checkbox = new html_checkbox(array('name' => '_notify', 'id' => 'edit-attendees-donotify', 'value' => 1));
	return html::div($attrib, html::label(null, $checkbox->show(1) . ' ' . $this->plugin->gettext('sendnotifications')));
	}

	/**
	* Wrapper for rcube_output_html::add_gui_object()
	*/
	function register_gui_object($name, $id)
	{
	$this->gui_objects[$name] = $id;
	$this->rc->output->add_gui_object($name, $id);
	}

	/**
	* Getter for registered gui objects.
	* (for manual registration when loading the inline UI)
	*/
	function get_gui_objects()
	{
	return $this->gui_objects;
	}
	}

File Metadata

Mime Type: text/x-diff
Expires: Fri, Apr 24, 1:46 PM (3 d, 6 h ago)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 18829643
Default Alt Text: (410 KB)

No OneTemporaryActions

View Options

File Metadata

Event Timeline

No OneTemporary
Actions