calendar_ui.php
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calendar_ui.php
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	<?php
	/**
	* User Interface class for the Calendar plugin
	*
	* @version @package_version@
	* @author Lazlo Westerhof <hello@lazlo.me>
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* Copyright (C) 2010, Lazlo Westerhof <hello@lazlo.me>
	* 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 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'));
	$this->cal->register_handler('plugin.freebusy_select', array($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, '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'));
	$this->cal->register_handler('plugin.attendees_freebusy_table', array($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'));
	$this->cal->register_handler('plugin.searchform', array($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');
	$this->cal->include_stylesheet($skin_path . '/jquery.miniColors.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->cal->include_script('lib/js/jquery.miniColors.min.js');
	}

	/**
	*
	*/
	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;
	$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";
	}
	$css .= ".$class .handle { background-color: #$color; }";
	}

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

	/**
	*
	*/
	function calendar_list($attrib = array())
	{
	$calendars = $this->cal->driver->list_calendars();

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

	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'));

	if (!$prop['virtual'])
	$jsenv[$id] = $prop;

	$html_id = html_identifier($id);
	$class = 'cal-' . asciiwords($id, true);
	$title = $prop['name'] != $prop['listname'] ? html_entity_decode($prop['name'], ENT_COMPAT, RCMAIL_CHARSET) : '';

	if ($prop['virtual'])
	$class .= ' virtual';
	else if ($prop['readonly'])
	$class .= ' readonly';
	if ($prop['class_name'])
	$class .= ' '.$prop['class_name'];

	$li .= html::tag('li', array('id' => 'rcmlical' . $html_id, 'class' => $class),
	($prop['virtual'] ? '' : html::tag('input', array('type' => 'checkbox', 'name' => '_cal[]', 'value' => $id, 'checked' => $prop['active']), '') .
	html::span('handle', ' ')) .
	html::span(array('class' => 'calname', 'title' => $title), $prop['listname']));
	}

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

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

	/**
	*
	*/
	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->gettext('days')), $days);
	foreach (array(2,5,7,14,30,60,90) as $days)
	$select_range->add($days . ' ' . preg_replace('/$\|$/', '', $this->cal->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' => 'days', 'week' => 'weeks', 'month' => 'months', 'smart' => 'smartsections') as $val => $label)
	$select_sections->add(preg_replace('/$\|$/', '', ucfirst($this->cal->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['readonly'])
	$select->add($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_identities();

	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 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');
	$select->add($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));
	}

	/**
	* Generate the form for recurrence settings
	*/
	function recurrence_form($attrib = array())
	{
	switch ($attrib['part']) {
	// frequency selector
	case 'frequency':
	$select = new html_select(array('name' => 'frequency', 'id' => 'edit-recurrence-frequency'));
	$select->add($this->cal->gettext('never'), '');
	$select->add($this->cal->gettext('daily'), 'DAILY');
	$select->add($this->cal->gettext('weekly'), 'WEEKLY');
	$select->add($this->cal->gettext('monthly'), 'MONTHLY');
	$select->add($this->cal->gettext('yearly'), 'YEARLY');
	$select->add($this->cal->gettext('rdate'), 'RDATE');
	$html = html::label('edit-frequency', $this->cal->gettext('frequency')) . $select->show('');
	break;

	// daily recurrence
	case 'daily':
	$select = $this->interval_selector(array('name' => 'interval', 'class' => 'edit-recurrence-interval', 'id' => 'edit-recurrence-interval-daily'));
	$html = html::div($attrib, html::label(null, $this->cal->gettext('every')) . $select->show(1) . html::span('label-after', $this->cal->gettext('days')));
	break;

	// weekly recurrence form
	case 'weekly':
	$select = $this->interval_selector(array('name' => 'interval', 'class' => 'edit-recurrence-interval', 'id' => 'edit-recurrence-interval-weekly'));
	$html = html::div($attrib, html::label(null, $this->cal->gettext('every')) . $select->show(1) . html::span('label-after', $this->cal->gettext('weeks')));
	// weekday selection
	$daymap = array('sun','mon','tue','wed','thu','fri','sat');
	$checkbox = new html_checkbox(array('name' => 'byday', 'class' => 'edit-recurrence-weekly-byday'));
	$first = $this->rc->config->get('calendar_first_day', 1);
	for ($weekdays = '', $j = $first; $j <= $first+6; $j++) {
	$d = $j % 7;
	$weekdays .= html::label(array('class' => 'weekday'), $checkbox->show('', array('value' => strtoupper(substr($daymap[$d], 0, 2)))) . $this->cal->gettext($daymap[$d])) . ' ';
	}
	$html .= html::div($attrib, html::label(null, $this->cal->gettext('bydays')) . $weekdays);
	break;

	// monthly recurrence form
	case 'monthly':
	$select = $this->interval_selector(array('name' => 'interval', 'class' => 'edit-recurrence-interval', 'id' => 'edit-recurrence-interval-monthly'));
	$html = html::div($attrib, html::label(null, $this->cal->gettext('every')) . $select->show(1) . html::span('label-after', $this->cal->gettext('months')));

	$checkbox = new html_checkbox(array('name' => 'bymonthday', 'class' => 'edit-recurrence-monthly-bymonthday'));
	for ($monthdays = '', $d = 1; $d <= 31; $d++) {
	$monthdays .= html::label(array('class' => 'monthday'), $checkbox->show('', array('value' => $d)) . $d);
	$monthdays .= $d % 7 ? ' ' : html::br();
	}

	// rule selectors
	$radio = new html_radiobutton(array('name' => 'repeatmode', 'class' => 'edit-recurrence-monthly-mode'));
	$table = new html_table(array('cols' => 2, 'border' => 0, 'cellpadding' => 0, 'class' => 'formtable'));
	$table->add('label', html::label(null, $radio->show('BYMONTHDAY', array('value' => 'BYMONTHDAY')) . ' ' . $this->cal->gettext('each')));
	$table->add(null, $monthdays);
	$table->add('label', html::label(null, $radio->show('', array('value' => 'BYDAY')) . ' ' . $this->cal->gettext('onevery')));
	$table->add(null, $this->rrule_selectors($attrib['part']));

	$html .= html::div($attrib, $table->show());

	break;

	// annually recurrence form
	case 'yearly':
	$select = $this->interval_selector(array('name' => 'interval', 'class' => 'edit-recurrence-interval', 'id' => 'edit-recurrence-interval-yearly'));
	$html = html::div($attrib, html::label(null, $this->cal->gettext('every')) . $select->show(1) . html::span('label-after', $this->cal->gettext('years')));
	// month selector
	$monthmap = array('','jan','feb','mar','apr','may','jun','jul','aug','sep','oct','nov','dec');
	$checkbox = new html_checkbox(array('name' => 'bymonth', 'class' => 'edit-recurrence-yearly-bymonth'));
	for ($months = '', $m = 1; $m <= 12; $m++) {
	$months .= html::label(array('class' => 'month'), $checkbox->show(null, array('value' => $m)) . $this->cal->gettext($monthmap[$m]));
	$months .= $m % 4 ? ' ' : html::br();
	}
	$html .= html::div($attrib + array('id' => 'edit-recurrence-yearly-bymonthblock'), $months);

	// day rule selection
	$html .= html::div($attrib, html::label(null, $this->cal->gettext('onevery')) . $this->rrule_selectors($attrib['part'], '---'));
	break;

	// end of recurrence form
	case 'until':
	$radio = new html_radiobutton(array('name' => 'repeat', 'class' => 'edit-recurrence-until'));
	$select = $this->interval_selector(array('name' => 'times', 'id' => 'edit-recurrence-repeat-times'));
	$input = new html_inputfield(array('name' => 'untildate', 'id' => 'edit-recurrence-enddate', 'size' => "10"));

	$table = new html_table(array('cols' => 2, 'border' => 0, 'cellpadding' => 0, 'class' => 'formtable'));

	$table->add('label', ucfirst($this->cal->gettext('recurrencend')));
	$table->add(null, html::label(null, $radio->show('', array('value' => '', 'id' => 'edit-recurrence-repeat-forever')) . ' ' .
	$this->cal->gettext('forever')));

	$table->add('label', '');
	$table->add(null, $radio->show('', array('value' => 'count', 'id' => 'edit-recurrence-repeat-count')) . ' ' .
	$this->cal->gettext(array(
	'name' => 'forntimes',
	'vars' => array('nr' => $select->show(1)))
	));

	$table->add('label', '');
	$table->add(null, $radio->show('', array('value' => 'until', 'id' => 'edit-recurrence-repeat-until')) . ' ' .
	$this->cal->gettext('untildate') . ' ' . $input->show(''));
	$html = $table->show();
	break;

	case 'rdate':
	$ul = html::tag('ul', array('id' => 'edit-recurrence-rdates'), '');
	$input = new html_inputfield(array('name' => 'rdate', 'id' => 'edit-recurrence-rdate-input', 'size' => "10"));
	$button = new html_inputfield(array('type' => 'button', 'class' => 'button add', 'value' => $this->cal->gettext('addrdate')));
	$html .= html::div($attrib, $ul . html::div('inputform', $input->show() . $button->show()));
	break;
	}

	return $html;
	}

	/**
	* Input field for interval selection
	*/
	private function interval_selector($attrib)
	{
	$select = new html_select($attrib);
	$select->add(range(1,30), range(1,30));
	return $select;
	}

	/**
	* Drop-down menus for recurrence rules like "each last sunday of"
	*/
	private function rrule_selectors($part, $noselect = null)
	{
	// rule selectors
	$select_prefix = new html_select(array('name' => 'bydayprefix', 'id' => "edit-recurrence-$part-prefix"));
	if ($noselect) $select_prefix->add($noselect, '');
	$select_prefix->add(array(
	$this->cal->gettext('first'),
	$this->cal->gettext('second'),
	$this->cal->gettext('third'),
	$this->cal->gettext('fourth'),
	$this->cal->gettext('last')
	),
	array(1, 2, 3, 4, -1));

	$select_wday = new html_select(array('name' => 'byday', 'id' => "edit-recurrence-$part-byday"));
	if ($noselect) $select_wday->add($noselect, '');

	$daymap = array('sunday','monday','tuesday','wednesday','thursday','friday','saturday');
	$first = $this->rc->config->get('calendar_first_day', 1);
	for ($j = $first; $j <= $first+6; $j++) {
	$d = $j % 7;
	$select_wday->add($this->cal->gettext($daymap[$d]), strtoupper(substr($daymap[$d], 0, 2)));
	}

	return $select_prefix->show() . ' ' . $select_wday->show();
	}

	/**
	* 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();

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

	$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 .= 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',
	'onclick' => JS_OBJECT_NAME . ".upload_file(this.form)"))) .
	html::div('hint', rcube_label(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())
	{
	$table = new html_table(array('cols' => 5, 'border' => 0, 'cellpadding' => 0, 'class' => 'rectable'));
	$table->add_header('role', $this->cal->gettext('role'));
	$table->add_header('name', $this->cal->gettext('attendee'));
	$table->add_header('availability', $this->cal->gettext('availability'));
	$table->add_header('confirmstate', $this->cal->gettext('confirmstate'));
	$table->add_header('options', '');

	return $table->show($attrib);
	}

	/**
	*
	*/
	function attendees_form($attrib = array())
	{
	$input = new html_inputfield(array('name' => 'participant', 'id' => 'edit-attendee-name', 'size' => 30));
	$checkbox = new html_checkbox(array('name' => 'invite', 'id' => 'edit-attendees-invite', 'value' => 1));

	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-invitebox', html::label(null, $checkbox->show(1) . $this->cal->gettext('sendinvitations')))
	);
	}

	/**
	*
	*/
	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);
	}

	/**
	* Render event details in a table
	*/
	function event_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']));
	$table->add('label', $this->cal->gettext('date'));
	$table->add('location', Q($this->cal->lib->event_date_text($event)));
	if ($event['location']) {
	$table->add('label', $this->cal->gettext('location'));
	$table->add('location', Q($event['location']));
	}

	return $table->show();
	}

	/**
	*
	*/
	function event_invitebox($attrib = array())
	{
	if ($this->cal->event) {
	return html::div($attrib,
	$this->event_details_table($this->cal->event, $this->cal->gettext('itipinvitation')) .
	$this->cal->invitestatus
	);
	}

	return '';
	}

	function event_rsvp_buttons($attrib = array())
	{
	$attrib += array('type' => 'button');
	foreach (array('accepted','tentative','declined') as $method) {
	$buttons .= html::tag('input', array(
	'type' => $attrib['type'],
	'name' => $attrib['iname'],
	'class' => 'button',
	'rel' => $method,
	'value' => $this->cal->gettext('itip' . $method),
	));
	}

	return html::div($attrib,
	html::div('label', $this->cal->gettext('acceptinvitation')) .
	html::div('rsvp-buttons', $buttons));
	}

	}

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