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	diff --git a/plugins/libcalendaring/libcalendaring.php b/plugins/libcalendaring/libcalendaring.php
	index 3016e51a..9df9e00c 100644
	--- a/plugins/libcalendaring/libcalendaring.php
	+++ b/plugins/libcalendaring/libcalendaring.php
	@@ -1,817 +1,819 @@
	<?php

	/**
	* Library providing common functions for calendaring plugins
	*
	* Provides utility functions for calendar-related modules such as
	* - alarms display and dismissal
	* - attachment handling
	* - recurrence computation and UI elements (TODO)
	* - ical parsing and exporting
	*
	* @version @package_version@
	* @author Thomas Bruederli <bruederli@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 libcalendaring extends rcube_plugin
	{
	public $rc;
	public $timezone;
	public $gmt_offset;
	public $dst_active;
	public $timezone_offset;

	public $defaults = array(
	'calendar_date_format' => "yyyy-MM-dd",
	'calendar_date_short' => "M-d",
	'calendar_date_long' => "MMM d yyyy",
	'calendar_date_agenda' => "ddd MM-dd",
	'calendar_time_format' => "HH:mm",
	'calendar_first_day' => 1,
	'calendar_first_hour' => 6,
	'calendar_date_format_sets' => array(
	'yyyy-MM-dd' => array('MMM d yyyy', 'M-d', 'ddd MM-dd'),
	'dd-MM-yyyy' => array('d MMM yyyy', 'd-M', 'ddd dd-MM'),
	'yyyy/MM/dd' => array('MMM d yyyy', 'M/d', 'ddd MM/dd'),
	'MM/dd/yyyy' => array('MMM d yyyy', 'M/d', 'ddd MM/dd'),
	'dd/MM/yyyy' => array('d MMM yyyy', 'd/M', 'ddd dd/MM'),
	'dd.MM.yyyy' => array('dd. MMM yyyy', 'd.M', 'ddd dd.MM.'),
	'd.M.yyyy' => array('d. MMM yyyy', 'd.M', 'ddd d.MM.'),
	),
	);

	private static $instance;

	/**
	* Singleton getter to allow direct access from other plugins
	*/
	public static function get_instance()
	{
	return self::$instance;
	}

	/**
	* Required plugin startup method
	*/
	public function init()
	{
	self::$instance = $this;

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

	// set user's timezone
	$this->timezone = new DateTimeZone($this->rc->config->get('timezone', 'GMT'));
	$now = new DateTime('now', $this->timezone);
	$this->gmt_offset = $now->getOffset();
	$this->dst_active = $now->format('I');
	$this->timezone_offset = $this->gmt_offset / 3600 - $this->dst_active;

	$this->add_texts('localization/', false);

	// include client scripts and styles
	if ($this->rc->output) {
	if ($this->rc->output->type == 'html') {
	$this->rc->output->set_env('libcal_settings', $this->load_settings());
	$this->include_script('libcalendaring.js');
	$this->include_stylesheet($this->local_skin_path() . '/libcal.css');
	}

	// add hook to display alarms
	$this->add_hook('refresh', array($this, 'refresh'));
	$this->register_action('plugin.alarms', array($this, 'alarms_action'));
	}
	}

	/**
	* Load iCalendar functions
	*/
	public static function get_ical()
	{
	$self = self::get_instance();
	require_once($self->home . '/libvcalendar.php');
	return new libvcalendar();
	}

	/**
	* Shift dates into user's current timezone
	*
	* @param mixed Any kind of a date representation (DateTime object, string or unix timestamp)
	* @return object DateTime object in user's timezone
	*/
	public function adjust_timezone($dt)
	{
	if (is_numeric($dt))
	$dt = new DateTime('@'.$dt);
	else if (is_string($dt))
	$dt = new DateTime($dt);

	if ($dt instanceof DateTime) {
	$dt->setTimezone($this->timezone);
	}

	return $dt;
	}


	/**
	*
	*/
	public function load_settings()
	{
	$this->date_format_defaults();
	$settings = array();

	// configuration
	$settings['date_format'] = (string)$this->rc->config->get('calendar_date_format', $this->defaults['calendar_date_format']);
	$settings['time_format'] = (string)$this->rc->config->get('calendar_time_format', $this->defaults['calendar_time_format']);
	$settings['date_short'] = (string)$this->rc->config->get('calendar_date_short', $this->defaults['calendar_date_short']);
	$settings['date_long'] = (string)$this->rc->config->get('calendar_date_long', $this->defaults['calendar_date_long']);
	$settings['dates_long'] = str_replace(' yyyy', '[ yyyy]', $settings['date_long']) . "{ '—' " . $settings['date_long'] . '}';
	$settings['first_day'] = (int)$this->rc->config->get('calendar_first_day', $this->defaults['calendar_first_day']);

	$settings['timezone'] = $this->timezone_offset;
	$settings['dst'] = $this->dst_active;

	// localization
	$settings['days'] = array(
	$this->rc->gettext('sunday'), $this->rc->gettext('monday'),
	$this->rc->gettext('tuesday'), $this->rc->gettext('wednesday'),
	$this->rc->gettext('thursday'), $this->rc->gettext('friday'),
	$this->rc->gettext('saturday')
	);
	$settings['days_short'] = array(
	$this->rc->gettext('sun'), $this->rc->gettext('mon'),
	$this->rc->gettext('tue'), $this->rc->gettext('wed'),
	$this->rc->gettext('thu'), $this->rc->gettext('fri'),
	$this->rc->gettext('sat')
	);
	$settings['months'] = array(
	$this->rc->gettext('longjan'), $this->rc->gettext('longfeb'),
	$this->rc->gettext('longmar'), $this->rc->gettext('longapr'),
	$this->rc->gettext('longmay'), $this->rc->gettext('longjun'),
	$this->rc->gettext('longjul'), $this->rc->gettext('longaug'),
	$this->rc->gettext('longsep'), $this->rc->gettext('longoct'),
	$this->rc->gettext('longnov'), $this->rc->gettext('longdec')
	);
	$settings['months_short'] = array(
	$this->rc->gettext('jan'), $this->rc->gettext('feb'),
	$this->rc->gettext('mar'), $this->rc->gettext('apr'),
	$this->rc->gettext('may'), $this->rc->gettext('jun'),
	$this->rc->gettext('jul'), $this->rc->gettext('aug'),
	$this->rc->gettext('sep'), $this->rc->gettext('oct'),
	$this->rc->gettext('nov'), $this->rc->gettext('dec')
	);
	$settings['today'] = $this->rc->gettext('today');

	// define list of file types which can be displayed inline
	// same as in program/steps/mail/show.inc
	$settings['mimetypes'] = (array)$this->rc->config->get('client_mimetypes');

	return $settings;
	}


	/**
	* Helper function to set date/time format according to config and user preferences
	*/
	private function date_format_defaults()
	{
	static $defaults = array();

	// nothing to be done
	if (isset($defaults['date_format']))
	return;

	$defaults['date_format'] = $this->rc->config->get('calendar_date_format', self::from_php_date_format($this->rc->config->get('date_format')));
	$defaults['time_format'] = $this->rc->config->get('calendar_time_format', self::from_php_date_format($this->rc->config->get('time_format')));

	// override defaults
	if ($defaults['date_format'])
	$this->defaults['calendar_date_format'] = $defaults['date_format'];
	if ($defaults['time_format'])
	$this->defaults['calendar_time_format'] = $defaults['time_format'];

	// derive format variants from basic date format
	$format_sets = $this->rc->config->get('calendar_date_format_sets', $this->defaults['calendar_date_format_sets']);
	if ($format_set = $format_sets[$this->defaults['calendar_date_format']]) {
	$this->defaults['calendar_date_long'] = $format_set[0];
	$this->defaults['calendar_date_short'] = $format_set[1];
	$this->defaults['calendar_date_agenda'] = $format_set[2];
	}
	}

	/**
	* Compose a date string for the given event
	*/
	public function event_date_text($event, $tzinfo = false)
	{
	$fromto = '';

	// abort if no valid event dates are given
	if (!is_object($event['start']) \|\| !is_a($event['start'], 'DateTime') \|\| !is_object($event['end']) \|\| !is_a($event['end'], 'DateTime'))
	return $fromto;

	$duration = $event['start']->diff($event['end'])->format('s');

	$this->date_format_defaults();
	$date_format = self::to_php_date_format($this->rc->config->get('calendar_date_format', $this->defaults['calendar_date_format']));
	$time_format = self::to_php_date_format($this->rc->config->get('calendar_time_format', $this->defaults['calendar_time_format']));

	if ($event['allday']) {
	$fromto = format_date($event['start'], $date_format);
	if (($todate = format_date($event['end'], $date_format)) != $fromto)
	$fromto .= ' - ' . $todate;
	}
	else if ($duration < 86400 && $event['start']->format('d') == $event['end']->format('d')) {
	$fromto = format_date($event['start'], $date_format) . ' ' . format_date($event['start'], $time_format) .
	' - ' . format_date($event['end'], $time_format);
	}
	else {
	$fromto = format_date($event['start'], $date_format) . ' ' . format_date($event['start'], $time_format) .
	' - ' . format_date($event['end'], $date_format) . ' ' . format_date($event['end'], $time_format);
	}

	// add timezone information
	if ($tzinfo && ($tzname = $this->timezone->getName())) {
	$fromto .= ' (' . strtr($tzname, '_', ' ') . ')';
	}

	return $fromto;
	}


	/**
	* Render HTML form for alarm configuration
	*/
	public function alarm_select($attrib, $alarm_types, $absolute_time = true)
	{
	unset($attrib['name']);
	$select_type = new html_select(array('name' => 'alarmtype[]', 'class' => 'edit-alarm-type'));
	$select_type->add($this->gettext('none'), '');
	foreach ($alarm_types as $type)
	$select_type->add($this->gettext(strtolower("alarm{$type}option")), $type);

	$input_value = new html_inputfield(array('name' => 'alarmvalue[]', 'class' => 'edit-alarm-value', 'size' => 3));
	$input_date = new html_inputfield(array('name' => 'alarmdate[]', 'class' => 'edit-alarm-date', 'size' => 10));
	$input_time = new html_inputfield(array('name' => 'alarmtime[]', 'class' => 'edit-alarm-time', 'size' => 6));

	$select_offset = new html_select(array('name' => 'alarmoffset[]', 'class' => 'edit-alarm-offset'));
	foreach (array('-M','-H','-D','+M','+H','+D') as $trigger)
	$select_offset->add($this->gettext('trigger' . $trigger), $trigger);

	if ($absolute_time)
	$select_offset->add($this->gettext('trigger@'), '@');

	// pre-set with default values from user settings
	$preset = self::parse_alaram_value($this->rc->config->get('calendar_default_alarm_offset', '-15M'));
	$hidden = array('style' => 'display:none');
	$html = html::span('edit-alarm-set',
	$select_type->show($this->rc->config->get('calendar_default_alarm_type', '')) . ' ' .
	html::span(array('class' => 'edit-alarm-values', 'style' => 'display:none'),
	$input_value->show($preset[0]) . ' ' .
	$select_offset->show($preset[1]) . ' ' .
	$input_date->show('', $hidden) . ' ' .
	$input_time->show('', $hidden)
	)
	);

	// TODO: support adding more alarms
	#$html .= html::a(array('href' => '#', 'id' => 'edit-alam-add', 'title' => $this->gettext('addalarm')),
	# $attrib['addicon'] ? html::img(array('src' => $attrib['addicon'], 'alt' => 'add')) : '(+)');

	return $html;
	}


	/******* Alarms handling *******/

	/**
	* Helper function to convert alarm trigger strings
	* into two-field values (e.g. "-45M" => 45, "-M")
	*/
	public static function parse_alaram_value($val)
	{
	if ($val[0] == '@')
	return array(substr($val, 1));
	else if (preg_match('/([+-])P?T?(\d+)([HMSDW])/', $val, $m))
	return array($m[2], $m[1].$m[3]);

	return false;
	}

	/**
	* Render localized text for alarm settings
	*/
	public static function alarms_text($alarm)
	{
	list($trigger, $action) = explode(':', $alarm);

	$text = '';
	$rcube = rcube::get_instance();

	switch ($action) {
	case 'EMAIL':
	$text = $rcube->gettext('libcalendaring.alarmemail');
	break;
	case 'DISPLAY':
	$text = $rcube->gettext('libcalendaring.alarmdisplay');
	break;
	}

	if (preg_match('/@(\d+)/', $trigger, $m)) {
	$text .= ' ' . $rcube->gettext(array(
	'name' => 'libcalendaring.alarmat',
	'vars' => array('datetime' => $rcube->format_date($m[1]))
	));
	}
	else if ($val = self::parse_alaram_value($trigger)) {
	$text .= ' ' . intval($val[0]) . ' ' . $rcube->gettext('libcalendaring.trigger' . $val[1]);
	}
	else
	return false;

	return $text;
	}

	/**
	* Get the next alarm (time & action) for the given event
	*
	* @param array Record data
	* @return array Hash array with alarm time/type or null if no alarms are configured
	*/
	public static function get_next_alarm($rec, $type = 'event')
	{
	if (!$rec['alarms'])
	return null;

	if ($type == 'task') {
	$timezone = self::get_instance()->timezone;
	if ($rec['date'])
	$rec['start'] = new DateTime($rec['date'] . ' ' . ($rec['time'] ?: '12:00'), $timezone);
	if ($rec['startdate'])
	$rec['end'] = new DateTime($rec['startdate'] . ' ' . ($rec['starttime'] ?: '12:00'), $timezone);
	}

	if (!$rec['end'])
	$rec['end'] = $rec['start'];


	// TODO: handle multiple alarms (currently not supported)
	list($trigger, $action) = explode(':', $rec['alarms'], 2);

	$notify = self::parse_alaram_value($trigger);
	if (!empty($notify[1])){ // offset
	$mult = 1;
	switch ($notify[1]) {
	case '-S': $mult = -1; break;
	case '+S': $mult = 1; break;
	case '-M': $mult = -60; break;
	case '+M': $mult = 60; break;
	case '-H': $mult = -3600; break;
	case '+H': $mult = 3600; break;
	case '-D': $mult = -86400; break;
	case '+D': $mult = 86400; break;
	case '-W': $mult = -604800; break;
	case '+W': $mult = 604800; break;
	}
	$offset = $notify[0] * $mult;
	$refdate = $mult > 0 ? $rec['end'] : $rec['start'];
	$notify_at = $refdate->format('U') + $offset;
	}
	else { // absolute timestamp
	$notify_at = $notify[0];
	}

	return array('time' => $notify_at, 'action' => $action ? strtoupper($action) : 'DISPLAY');
	}

	/**
	* Handler for keep-alive requests
	* This will check for pending notifications and pass them to the client
	*/
	public function refresh($attr)
	{
	// collect pending alarms from all providers (e.g. calendar, tasks)
	$plugin = $this->rc->plugins->exec_hook('pending_alarms', array(
	'time' => time(),
	'alarms' => array(),
	));

	if (!$plugin['abort'] && !empty($plugin['alarms'])) {
	// make sure texts and env vars are available on client
	$this->add_texts('localization/', true);
	$this->rc->output->set_env('snooze_select', $this->snooze_select());
	$this->rc->output->command('plugin.display_alarms', $this->_alarms_output($plugin['alarms']));
	}
	}

	/**
	* Handler for alarm dismiss/snooze requests
	*/
	public function alarms_action()
	{
	// $action = rcube_utils::get_input_value('action', rcube_utils::INPUT_GPC);
	$data = rcube_utils::get_input_value('data', rcube_utils::INPUT_POST, true);

	$data['ids'] = explode(',', $data['id']);
	$plugin = $this->rc->plugins->exec_hook('dismiss_alarms', $data);

	if ($plugin['success'])
	$this->rc->output->show_message('successfullysaved', 'confirmation');
	else
	$this->rc->output->show_message('calendar.errorsaving', 'error');
	}

	/**
	* Generate reduced and streamlined output for pending alarms
	*/
	private function _alarms_output($alarms)
	{
	$out = array();
	foreach ($alarms as $alarm) {
	$out[] = array(
	'id' => $alarm['id'],
	'start' => $alarm['start'] ? $this->adjust_timezone($alarm['start'])->format('c') : '',
	'end' => $alarm['end'] ? $this->adjust_timezone($alarm['end'])->format('c') : '',
	'allDay' => ($alarm['allday'] == 1)?true:false,
	'title' => $alarm['title'],
	'location' => $alarm['location'],
	'calendar' => $alarm['calendar'],
	);
	}

	return $out;
	}

	/**
	* Render a dropdown menu to choose snooze time
	*/
	private function snooze_select($attrib = array())
	{
	$steps = array(
	5 => 'repeatinmin',
	10 => 'repeatinmin',
	15 => 'repeatinmin',
	20 => 'repeatinmin',
	30 => 'repeatinmin',
	60 => 'repeatinhr',
	120 => 'repeatinhrs',
	1440 => 'repeattomorrow',
	10080 => 'repeatinweek',
	);

	$items = array();
	foreach ($steps as $n => $label) {
	$items[] = html::tag('li', null, html::a(array('href' => "#" . ($n * 60), 'class' => 'active'),
	$this->gettext(array('name' => $label, 'vars' => array('min' => $n % 60, 'hrs' => intval($n / 60))))));
	}

	return html::tag('ul', $attrib + array('class' => 'toolbarmenu'), join("\n", $items), html::$common_attrib);
	}


	/******* Attachments handling *******/

	/**
	* Handler for attachment uploads
	*/
	public function attachment_upload($session_key, $id_prefix = '')
	{
	// Upload progress update
	if (!empty($_GET['_progress'])) {
	$this->rc->upload_progress();
	}

	$recid = $id_prefix . rcube_utils::get_input_value('_id', rcube_utils::INPUT_GPC);
	$uploadid = rcube_utils::get_input_value('_uploadid', rcube_utils::INPUT_GPC);

	if (!is_array($_SESSION[$session_key]) \|\| $_SESSION[$session_key]['id'] != $recid) {
	$_SESSION[$session_key] = array();
	$_SESSION[$session_key]['id'] = $recid;
	$_SESSION[$session_key]['attachments'] = array();
	}

	// clear all stored output properties (like scripts and env vars)
	$this->rc->output->reset();

	if (is_array($_FILES['_attachments']['tmp_name'])) {
	foreach ($_FILES['_attachments']['tmp_name'] as $i => $filepath) {
	// Process uploaded attachment if there is no error
	$err = $_FILES['_attachments']['error'][$i];

	if (!$err) {
	$attachment = array(
	'path' => $filepath,
	'size' => $_FILES['_attachments']['size'][$i],
	'name' => $_FILES['_attachments']['name'][$i],
	'mimetype' => rcube_mime::file_content_type($filepath, $_FILES['_attachments']['name'][$i], $_FILES['_attachments']['type'][$i]),
	'group' => $recid,
	);

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

	if (!$err && $attachment['status'] && !$attachment['abort']) {
	$id = $attachment['id'];

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

	if (($icon = $_SESSION[$session_key . '_deleteicon']) && is_file($icon)) {
	$button = html::img(array(
	'src' => $icon,
	'alt' => $this->rc->gettext('delete')
	));
	}
	else {
	$button = Q($this->rc->gettext('delete'));
	}

	$content = html::a(array(
	'href' => "#delete",
	'class' => 'delete',
	'onclick' => sprintf("return %s.remove_from_attachment_list('rcmfile%s')", JS_OBJECT_NAME, $id),
	'title' => $this->rc->gettext('delete'),
	), $button);

	$content .= Q($attachment['name']);

	$this->rc->output->command('add2attachment_list', "rcmfile$id", array(
	'html' => $content,
	'name' => $attachment['name'],
	'mimetype' => $attachment['mimetype'],
	'classname' => rcube_utils::file2class($attachment['mimetype'], $attachment['name']),
	'complete' => true), $uploadid);
	}
	else { // upload failed
	if ($err == UPLOAD_ERR_INI_SIZE \|\| $err == UPLOAD_ERR_FORM_SIZE) {
	$msg = $this->rc->gettext(array('name' => 'filesizeerror', 'vars' => array(
	'size' => show_bytes(parse_bytes(ini_get('upload_max_filesize'))))));
	}
	else if ($attachment['error']) {
	$msg = $attachment['error'];
	}
	else {
	$msg = $this->rc->gettext('fileuploaderror');
	}

	$this->rc->output->command('display_message', $msg, 'error');
	$this->rc->output->command('remove_from_attachment_list', $uploadid);
	}
	}
	}
	else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
	// if filesize exceeds post_max_size then $_FILES array is empty,
	// show filesizeerror instead of fileuploaderror
	if ($maxsize = ini_get('post_max_size'))
	$msg = $this->rc->gettext(array('name' => 'filesizeerror', 'vars' => array(
	'size' => show_bytes(parse_bytes($maxsize)))));
	else
	$msg = $this->rc->gettext('fileuploaderror');

	$this->rc->output->command('display_message', $msg, 'error');
	$this->rc->output->command('remove_from_attachment_list', $uploadid);
	}

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


	/**
	* Deliver an event/task attachment to the client
	* (similar as in Roundcube core program/steps/mail/get.inc)
	*/
	public function attachment_get($attachment)
	{
	ob_end_clean();

	if ($attachment && $attachment['body']) {
	// allow post-processing of the attachment body
	$part = new rcube_message_part;
	$part->filename = $attachment['name'];
	$part->size = $attachment['size'];
	$part->mimetype = $attachment['mimetype'];

	$plugin = $this->rc->plugins->exec_hook('message_part_get', array(
	'body' => $attachment['body'],
	'mimetype' => strtolower($attachment['mimetype']),
	'download' => !empty($_GET['_download']),
	'part' => $part,
	));

	if ($plugin['abort'])
	exit;

	$mimetype = $plugin['mimetype'];
	list($ctype_primary, $ctype_secondary) = explode('/', $mimetype);

	$browser = $this->rc->output->browser;

	// send download headers
	if ($plugin['download']) {
	header("Content-Type: application/octet-stream");
	if ($browser->ie)
	header("Content-Type: application/force-download");
	}
	else if ($ctype_primary == 'text') {
	header("Content-Type: text/$ctype_secondary");
	}
	else {
	header("Content-Type: $mimetype");
	header("Content-Transfer-Encoding: binary");
	}

	// display page, @TODO: support text/plain (and maybe some other text formats)
	if ($mimetype == 'text/html' && empty($_GET['_download'])) {
	$OUTPUT = new rcube_html_page();
	// @TODO: use washtml on $body
	$OUTPUT->write($plugin['body']);
	}
	else {
	// don't kill the connection if download takes more than 30 sec.
	@set_time_limit(0);

	$filename = $attachment['name'];
	$filename = preg_replace('[\r\n]', '', $filename);

	if ($browser->ie && $browser->ver < 7)
	$filename = rawurlencode(abbreviate_string($filename, 55));
	else if ($browser->ie)
	$filename = rawurlencode($filename);
	else
	$filename = addcslashes($filename, '"');

	$disposition = !empty($_GET['_download']) ? 'attachment' : 'inline';
	header("Content-Disposition: $disposition; filename=\"$filename\"");

	echo $plugin['body'];
	}

	exit;
	}

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

	/**
	* Show "loading..." page in attachment iframe
	*/
	public function attachment_loading_page()
	{
	$url = str_replace('&_preload=1', '', $_SERVER['REQUEST_URI']);
	$message = $this->rc->gettext('loadingdata');

	header('Content-Type: text/html; charset=' . RCMAIL_CHARSET);
	print "<html>\n<head>\n"
	. '<meta http-equiv="refresh" content="0; url='.Q($url).'">' . "\n"
	. '<meta http-equiv="content-type" content="text/html; charset='.RCMAIL_CHARSET.'">' . "\n"
	. "</head>\n<body>\n$message\n</body>\n</html>";
	exit;
	}

	/**
	* Template object for attachment display frame
	*/
	public function attachment_frame($attrib = array())
	{
	$mimetype = strtolower($this->attachment['mimetype']);
	list($ctype_primary, $ctype_secondary) = explode('/', $mimetype);

	$attrib['src'] = './?' . str_replace('_frame=', ($ctype_primary == 'text' ? '_show=' : '_preload='), $_SERVER['QUERY_STRING']);

	return html::iframe($attrib);
	}

	/**
	*
	*/
	public function attachment_header($attrib = array())
	{
	$table = new html_table(array('cols' => 3));

	if (!empty($this->attachment['name'])) {
	$table->add('title', Q($this->rc->gettext('filename')));
	$table->add('header', Q($this->attachment['name']));
	$table->add('download-link', html::a('?'.str_replace('_frame=', '_download=', $_SERVER['QUERY_STRING']), Q($this->rc->gettext('download'))));
	}

	if (!empty($this->attachment['size'])) {
	$table->add('title', Q($this->rc->gettext('filesize')));
	$table->add('header', Q(show_bytes($this->attachment['size'])));
	}

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


	/******* Static utility functions *******/

	/**
	* Convert the internal structured data into a vcalendar rrule 2.0 string
	*/
	public static function to_rrule($recurrence)
	{
	if (is_string($recurrence))
	return $recurrence;

	$rrule = '';
	foreach ((array)$recurrence as $k => $val) {
	$k = strtoupper($k);
	switch ($k) {
	case 'UNTIL':
	$val = $val->format('Ymd\THis');
	break;
	case 'EXDATE':
	foreach ((array)$val as $i => $ex)
	$val[$i] = $ex->format('Ymd\THis');
	$val = join(',', (array)$val);
	break;
	case 'EXCEPTIONS':
	continue 2;
	}
	$rrule .= $k . '=' . $val . ';';
	}

	return rtrim($rrule, ';');
	}

	/**
	* Convert from fullcalendar date format to PHP date() format string
	*/
	public static function to_php_date_format($from)
	{
	// "dd.MM.yyyy HH:mm:ss" => "d.m.Y H:i:s"
	return strtr(strtr($from, array(
	'yyyy' => 'Y',
	'yy' => 'y',
	'MMMM' => 'F',
	'MMM' => 'M',
	'MM' => 'm',
	'M' => 'n',
	'dddd' => 'l',
	'ddd' => 'D',
	'dd' => 'd',
	+ 'd' => 'j',
	'HH' => '**',
	'hh' => '%%',
	'H' => 'G',
	'h' => 'g',
	'mm' => 'i',
	'ss' => 's',
	'TT' => 'A',
	'tt' => 'a',
	'T' => 'A',
	't' => 'a',
	'u' => 'c',
	)), array(
	'**' => 'H',
	'%%' => 'h',
	));
	}

	/**
	* Convert from PHP date() format to fullcalendar format string
	*/
	public static function from_php_date_format($from)
	{
	// "d.m.Y H:i:s" => "dd.MM.yyyy HH:mm:ss"
	return strtr($from, array(
	'y' => 'yy',
	'Y' => 'yyyy',
	'M' => 'MMM',
	'F' => 'MMMM',
	'm' => 'MM',
	'n' => 'M',
	+ 'j' => 'd',
	'd' => 'dd',
	'D' => 'ddd',
	'l' => 'dddd',
	'H' => 'HH',
	'h' => 'hh',
	'G' => 'H',
	'g' => 'h',
	'i' => 'mm',
	's' => 'ss',
	'A' => 'TT',
	'a' => 'tt',
	'c' => 'u',
	));
	}

	}

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