calendar_ui.php
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calendar_ui.php
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	<?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',
	'type' => 'link'
	), 'taskbar');

	// load basic client script
	if ($this->rc->action != 'print') {
	$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'));
	$this->cal->register_handler('plugin.attendees_list', array($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'));
	$this->cal->register_handler('plugin.edit_recurrence_sync', array($this, 'edit_recurrence_sync'));
	$this->cal->register_handler('plugin.edit_recurring_warning', array($this, 'recurring_event_warning'));
	$this->cal->register_handler('plugin.event_rsvp_buttons', array($this, 'event_rsvp_buttons'));
	$this->cal->register_handler('plugin.agenda_options', array($this, 'agenda_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

	kolab_attachments_handler::ui();
	}

	/**
	* 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');
	$this->cal->api->include_script('libkolab/libkolab.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, $attrib);
	}

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

	/**
	*
	*/
	public function calendar_css_classes($id, $prop, $mode, $attrib = array())
	{
	$color = $folder_color = $prop['color'];

	// replace white with skin-defined color
	if (!empty($attrib['folder-fallback-color']) && preg_match('/^f+$/i', $folder_color)) {
	$folder_color = $attrib['folder-fallback-color'];
	}

	$class = 'cal-' . asciiwords($id, true);
	$css = str_replace('$class', $class, $attrib['folder-class']) ?: "li .$class";
	$css .= ", #eventshow .$class { color: #$folder_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 (!$prop['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(), $js_only = false)
	{
	$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);

	if ($js_only) {
	return;
	}

	$this->rc->output->set_env('source', rcube_utils::get_input_value('source', rcube_utils::INPUT_GET));
	$this->rc->output->add_gui_object('calendarslist', $attrib['id'] ?: 'unknown');

	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, RCUBE_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::a(array('class' => 'calname', 'id' => $label_id, 'title' => $title, 'href' => '#'), rcube::Q($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;
	}

	/**
	* Render a HTML for agenda options form
	*/
	function agenda_options($attrib = array())
	{
	$attrib += array('id' => 'agendaoptions');
	$attrib['style'] .= 'display:none';

	$select_range = new html_select(array('name' => 'listrange', 'id' => 'agenda-listrange', 'class' => 'form-control custom-select'));
	$select_range->add(1 . ' ' . preg_replace('/$.+$/', '', $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::span('input-group',
	html::label(array('for' => 'agenda-listrange', 'class' => 'input-group-prepend'),
	html::span('input-group-text', $this->cal->gettext('listrange')))
	. $select_range->show($this->rc->config->get('calendar_agenda_range', $this->cal->defaults['calendar_agenda_range']))
	);

	$select_sections = new html_select(array('name' => 'listsections', 'id' => 'agenda-listsections', 'class' => 'form-control custom-select'));
	$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('input-group',
	html::label(array('for' => 'agenda-listsections', 'class' => 'input-group-prepend'),
	html::span('input-group-text', $this->cal->gettext('listsections')))
	. $select_sections->show($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('status-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);
	}

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

	/**
	* Render HTML for recurrence option to align start date with the recurrence rule
	*/
	function edit_recurrence_sync($attrib = array())
	{
	$checkbox = new html_checkbox(array('name' => '_start_sync', 'value' => 1, 'class' => 'pretty-checkbox'));
	return html::div($attrib, html::label(null, $checkbox->show(1) . ' ' . $this->cal->gettext('eventstartsync')));
	}

	/**
	* 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', $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 = $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));

	$html = html::div('form-section form-group row',
	html::label(array('class' => 'col-sm-4 col-form-label', 'for' => 'importfile'), rcube::Q($this->rc->gettext('importfromfile')))
	. html::div('col-sm-8', $input->show()
	. html::div('hint', $this->rc->gettext(array('id' => 'importfile', 'name' => 'maxuploadsize', 'vars' => array('size' => $max_filesize)))))
	);

	$html .= html::div('form-section form-group row',
	html::label(array('for' => 'event-import-calendar', 'class' => 'col-form-label col-sm-4'), $this->cal->gettext('calendar'))
	. html::div('col-sm-8', $this->calendar_select(array('name' => 'calendar', 'id' => 'event-import-calendar')))
	);

	$html .= html::div('form-section form-group row',
	html::label(array('for' => 'event-import-range', 'class' => 'col-form-label col-sm-4'), $this->cal->gettext('importrange'))
	. html::div('col-sm-8', $select->show(1))
	);

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

	return html::tag('p', null, $this->cal->gettext('importtext'))
	. 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 form-group row',
	html::label(array('for' => 'event-export-calendar', 'class' => 'col-sm-4 col-form-label'), $this->cal->gettext('calendar'))
	. html::div('col-sm-8', $this->calendar_select(array('name' => 'calendar', 'id' => 'event-export-calendar', 'class' => 'form-control custom-select'))));

	$select = new html_select(array('name' => 'range', 'id' => 'event-export-range', 'class' => 'form-control custom-select'));
	$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 form-group row',
	html::label(array('for' => 'event-export-range', 'class' => 'col-sm-4 col-form-label'), $this->cal->gettext('exportrange'))
	. html::div('col-sm-8', $select->show(0) . html::span(array('style'=>'display:none'), $startdate->show())));

	$checkbox = new html_checkbox(array('name' => 'attachments', 'id' => 'event-export-attachments', 'value' => 1, 'class' => 'form-check-input pretty-checkbox'));
	$html .= html::div('form-section form-check row',
	html::label(array('for' => 'event-export-attachments', 'class' => 'col-sm-4 col-form-label'), $this->cal->gettext('exportattachments'))
	. html::div('col-sm-8', $checkbox->show(1)));

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

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

	/**
	* Handler for calendar form template.
	* The form content could be overriden by the driver
	*/
	function calendar_editform($action, $calendar = array())
	{
	$this->action = $action;
	$this->calendar = $calendar;

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

	$this->rc->output->set_env('pagetitle', $this->cal->gettext('calendarprops'));
	$this->rc->output->add_handler('folderform', array($this, 'calendarform'));
	$this->rc->output->send('libkolab.folderform');
	}

	/**
	* Handler for calendar form template.
	* The form content could be overriden by the driver
	*/
	function calendarform($attrib)
	{
	// 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' => 7, 'class' => 'colors'));

	$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' => $checkbox->show($this->calendar['showalarms'] ? 1 :0),
	'id' => 'calendar-showalarms',
	);
	}

	// allow driver to extend or replace the form content
	return html::tag('form', $attrib + array('action' => "#", 'method' => "get", 'id' => 'calendarpropform'),
	$this->cal->driver->calendar_form($this->action, $this->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', html::span('inner', $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', 'class' => 'form-control'));
	$textarea = new html_textarea(array('name' => 'comment', 'id' => 'edit-attendees-comment', 'class' => 'form-control',
	'rows' => 4, 'cols' => 55, 'title' => $this->cal->gettext('itipcommenttitle')));

	return html::div($attrib,
	html::div('form-searchbar', $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('edit-attendees-comment', $this->cal->gettext('itipcomment')) . $textarea->show())
	);
	}

	/**
	*
	*/
	function resources_form($attrib = array())
	{
	$input = new html_inputfield(array('name' => 'resource', 'id' => 'edit-resource-name', 'class' => 'form-control'));

	return html::div($attrib,
	html::div('form-searchbar', $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') + $attrib,
	html::tag('thead', null,
	html::tag('tr', null,
	html::tag('td', array('colspan' => 2), rcube::Q($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',
	'reset-command' => 'reset-resource-search',
	'id' => 'rcmcalresqsearchbox',
	'autocomplete' => 'off',
	'form-name' => 'rcmcalresoursqsearchform',
	'gui-object' => 'resourcesearchform',
	);

	// add form tag around text field
	return $this->rc->output->search_form($attrib);
	}

	/**
	*
	*/
	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);
	}

	}

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