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	diff --git a/plugins/calendar/drivers/kolab/kolab_driver.php b/plugins/calendar/drivers/kolab/kolab_driver.php
	index 653a3b89..62f34b8c 100644
	--- a/plugins/calendar/drivers/kolab/kolab_driver.php
	+++ b/plugins/calendar/drivers/kolab/kolab_driver.php
	@@ -1,1225 +1,1224 @@
	<?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, 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/>.
	*/

	require_once(dirname(__FILE__) . '/kolab_calendar.php');

	class kolab_driver extends calendar_driver
	{
	// features this backend supports
	public $alarms = true;
	public $attendees = true;
	public $freebusy = true;
	public $attachments = true;
	public $undelete = true;
	public $alarm_types = array('DISPLAY','EMAIL');
	public $categoriesimmutable = true;

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

	/**
	* Default constructor
	*/
	public function __construct($cal)
	{
	$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'));
	}


	/**
	* 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
	$folders = kolab_storage::get_folders('event');
	$this->calendars = array();

	if (PEAR::isError($folders)) {
	raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Failed to list calendar folders from Kolab server:" . $folders->getMessage()),
	true, false);
	}
	else {
	// convert to UTF8 and sort
	$names = array();
	foreach ($folders as $folder)
	$names[$folder->name] = rcube_charset::convert($folder->name, 'UTF7-IMAP');

	asort($names, SORT_LOCALE_STRING);

	foreach ($names as $utf7name => $name) {
	$calendar = new kolab_calendar($utf7name, $this->cal);
	$this->calendars[$calendar->id] = $calendar;
	if (!$calendar->readonly)
	$this->has_writeable = true;
	}
	}

	return $this->calendars;
	}


	/**
	* Get a list of available calendars from this source
	*/
	public function list_calendars()
	{
	// 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();
	}
	}

	$calendars = $names = array();

	foreach ($this->calendars as $id => $cal) {
	if ($cal->ready) {
	$name = $origname = $cal->get_name();

	// find folder prefix to truncate (the same code as in kolab_addressbook plugin)
	for ($i = count($names)-1; $i >= 0; $i--) {
	if (strpos($name, $names[$i].' » ') === 0) {
	$length = strlen($names[$i].' » ');
	$prefix = substr($name, 0, $length);
	$count = count(explode(' » ', $prefix));
	$name = str_repeat('  ', $count-1) . '» ' . substr($name, $length);
	break;
	}
	}

	$names[] = $origname;

	$calendars[$cal->id] = array(
	'id' => $cal->id,
	'name' => $name,
	'editname' => $cal->get_foldername(),
	'color' => $cal->get_color(),
	'readonly' => $cal->readonly,
	'showalarms' => $cal->alarms,
	'class_name' => $cal->get_namespace(),
	'active' => $cal->storage->is_subscribed(kolab_storage::SERVERSIDE_SUBSCRIPTION),
	);
	}
	}

	return $calendars;
	}


	/**
	* 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)
	{
	$folder = $this->folder_update($prop);

	if ($folder === false) {
	return false;
	}

	// subscribe to new calendar by default
	$storage = kolab_storage::get_folder($folder);
	$storage->subscribe($prop['active'], kolab_storage::SERVERSIDE_SUBSCRIPTION);

	// 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 = $this->calendars[$prop['id']])) {
	$oldfolder = $cal->get_realname();
	$newfolder = $this->folder_update($prop);

	if ($newfolder === false) {
	return false;
	}

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

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

	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 true;
	}

	return false;
	}


	/**
	* Set active/subscribed state of a calendar
	*
	* @see calendar_driver::subscribe_calendar()
	*/
	public function subscribe_calendar($prop)
	{
	if ($prop['id'] && ($cal = $this->calendars[$prop['id']])) {
	return $cal->storage->subscribe($prop['active'], kolab_storage::SERVERSIDE_SUBSCRIPTION);
	}

	return false;
	}


	/**
	* Rename or Create a new IMAP folder
	*
	* @param array Hash array with calendar properties
	*
	* @return mixed New folder name or False on failure
	*/
	private function folder_update(&$prop)
	{
	$folder = rcube_charset::convert($prop['name'], RCMAIL_CHARSET, 'UTF7-IMAP');
	$oldfolder = $prop['oldname']; // UTF7
	$parent = $prop['parent']; // UTF7
	$storage = $this->rc->get_storage();
	$delimiter = $storage->get_hierarchy_delimiter();

	if (strlen($oldfolder)) {
	$options = $storage->folder_info($oldfolder);
	}

	if (!empty($options) && ($options['norename'] \|\| $options['protected'])) {
	}
	// sanity checks (from steps/settings/save_folder.inc)
	else if (!strlen($folder)) {
	$this->last_error = 'Invalid folder name';
	return false;
	}
	else if (strlen($folder) > 128) {
	$this->last_error = 'Folder name too long';
	return false;
	}
	else {
	// these characters are problematic e.g. when used in LIST/LSUB
	foreach (array($delimiter, '%', '*') as $char) {
	if (strpos($folder, $delimiter) !== false) {
	$this->last_error = 'Invalid folder name';
	return false;
	}
	}
	}

	if (!empty($options) && ($options['protected'] \|\| $options['norename'])) {
	$folder = $oldfolder;
	}
	else if (strlen($parent)) {
	$folder = $parent . $delimiter . $folder;
	}
	else {
	// add namespace prefix (when needed)
	$folder = $storage->mod_folder($folder, 'in');
	}

	// Check access rights to the parent folder
	if (strlen($parent) && (!strlen($oldfolder) \|\| $oldfolder != $folder)) {
	$parent_opts = $storage->folder_info($parent);
	if ($parent_opts['namespace'] != 'personal'
	&& (empty($parent_opts['rights']) \|\| !preg_match('/[ck]/', implode($parent_opts)))
	) {
	$this->last_error = 'No permission to create folder';
	return false;
	}
	}

	// update the folder name
	if (strlen($oldfolder)) {
	if ($oldfolder != $folder) {
	if (!($result = kolab_storage::folder_rename($oldfolder, $folder)))
	$this->last_error = kolab_storage::$last_error;
	}
	else
	$result = true;
	}
	// create new folder
	else {
	if (!($result = kolab_storage::folder_create($folder, 'event', false)))
	$this->last_error = kolab_storage::$last_error;
	}

	// save color in METADATA
	// TODO: also save 'showalarams' and other properties here

	if ($result && $prop['color']) {
	if (!($meta_saved = $storage->set_metadata(array(kolab_calendar::COLOR_KEY_SHARED => $prop['color'])))) // try in shared namespace
	$meta_saved = $storage->set_metadata(array(kolab_calendar::COLOR_KEY_PRIVATE => $prop['color'])); // try in private namespace
	if ($meta_saved)
	unset($prop['color']); // unsetting will prevent fallback to local user prefs
	}

	return $result ? $folder : false;
	}


	/**
	* Delete the given calendar with all its contents
	*
	* @see calendar_driver::remove_calendar()
	*/
	public function remove_calendar($prop)
	{
	if ($prop['id'] && ($cal = $this->calendars[$prop['id']])) {
	$folder = $cal->get_realname();
	if (kolab_storage::folder_delete($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;
	}


	/**
	* 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, $writeable = null)
	{
	if (is_array($event)) {
	$id = $event['id'] ? $event['id'] : $event['uid'];
	$cal = $event['calendar'];
	}
	else {
	$id = $event;
	}

	if ($cal && ($storage = $this->calendars[$cal])) {
	return $storage->get_event($id);
	}
	// iterate over all calendar folders and search for the event ID
	else if (!$cal) {
	foreach ($this->calendars as $storage) {
	if ($writeable && $storage->readonly)
	continue;
	if ($result = $storage->get_event($id)) {
	return $result;
	}
	}
	}

	return false;
	}

	/**
	* Add a single event to the database
	*
	* @see calendar_driver::new_event()
	*/
	public function new_event($event)
	{
	$cid = $event['calendar'] ? $event['calendar'] : reset(array_keys($this->calendars));
	if ($storage = $this->calendars[$cid]) {
	// handle attachments to add
	if (!empty($event['attachments'])) {
	foreach ($event['attachments'] as $idx => $attachment) {
	// we'll read file contacts into memory, Horde/Kolab classes does the same
	// So we cannot save memory, rcube_imap class can do this better
	$event['attachments'][$idx]['content'] = $attachment['data'] ? $attachment['data'] : file_get_contents($attachment['path']);
	}
	}

	$GLOBALS['conf']['kolab']['no_triggering'] = true;
	$success = $storage->insert_event($event);

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

	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)
	{
	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 = $this->calendars[$event['calendar']]) && ($ev = $storage->get_event($event['id'])))
	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 = $this->calendars[$event['calendar']]) && ($ev = $storage->get_event($event['id'])))
	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)
	{
	$success = false;
	$_savemode = $event['_savemode'];

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

	$this->rc->session->remove('calendar_restore_event_data');
	$GLOBALS['conf']['kolab']['no_triggering'] = true;

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

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

	// removing the first instance => just move to next occurence
	if ($master['id'] == $event['id']) {
	$recurring = reset($storage->_get_recurring_events($event, $event['start'], $event['end'] + 86400 * 370, $event['id'].'-1'));
	$master['start'] = $recurring['start'];
	$master['end'] = $recurring['end'];
	if ($master['recurrence']['COUNT'])
	$master['recurrence']['COUNT']--;
	}
	else { // add exception to master event
	$master['recurrence']['EXDATE'][] = $event['start'];
	}
	$success = $storage->update_event($master);
	break;

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

	// set until-date on master event
	$master['recurrence']['UNTIL'] = $event['start'] - 86400;
	unset($master['recurrence']['COUNT']);
	$success = $storage->update_event($master);
	break;
	}

	default: // 'all' is default
	$success = $storage->delete_event($master, $force);
	break;
	}
	}

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

	return $success;
	}

	/**
	* 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 = $this->calendars[$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->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 = $this->calendars[$event['calendar']]))
	return false;

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

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

	$fromcalendar = $storage;
	- $storage->storage->synchronize();
	}
	}
	else
	$fromcalendar = $storage;

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

	// delete existing attachment(s)
	if (!empty($event['deleted_attachments'])) {
	foreach ($event['deleted_attachments'] as $attachment) {
	if (!empty($old['attachments'])) {
	foreach ($old['attachments'] as $idx => $att) {
	if ($att['id'] == $attachment) {
	unset($old['attachments'][$idx]);
	}
	}
	}
	}
	}

	// handle attachments to add
	if (!empty($event['attachments'])) {
	foreach ($event['attachments'] as $attachment) {
	// skip entries without content (could be existing ones)
	if (!$attachment['data'] && !$attachment['path'])
	continue;
	// we'll read file contacts into memory, Horde/Kolab classes does the same
	// So we cannot save memory, rcube_imap class can do this better
	$attachments[] = array(
	'name' => $attachment['name'],
	'type' => $attachment['mimetype'],
	'content' => $attachment['data'] ? $attachment['data'] : file_get_contents($attachment['path']),
	);
	}
	}

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

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

	// keep saved exceptions (not submitted by the client)
	if ($old['recurrence']['EXDATE'])
	$event['recurrence']['EXDATE'] = $old['recurrence']['EXDATE'];

	$GLOBALS['conf']['kolab']['no_triggering'] = true;

	switch ($savemode) {
	case 'new':
	// save submitted data as new (non-recurring) event
	$event['recurrence'] = array();
	$event['uid'] = $this->cal->generate_uid();

	// copy attachment data to new event
	foreach ((array)$event['attachments'] as $idx => $attachment) {
	if (!$attachment['data'])
	$attachment['data'] = $fromcalendar->get_attachment_body($attachment['id']);
	}

	$success = $storage->insert_event($event);
	break;

	case 'current':
	// add exception to master event
	$master['recurrence']['EXDATE'][] = $old['start'];
	$storage->update_event($master);

	// insert new event for this occurence
	$event += $old;
	$event['recurrence'] = array();
	$event['uid'] = $this->cal->generate_uid();
	$success = $storage->insert_event($event);
	break;

	case 'future':
	if ($master['id'] != $event['id']) {
	// set until-date on master event
	$master['recurrence']['UNTIL'] = $old['start'] - 86400;
	unset($master['recurrence']['COUNT']);
	$storage->update_event($master);

	// save this instance as new recurring event
	$event += $old;
	$event['uid'] = $this->cal->generate_uid();

	// if recurrence COUNT, update value to the correct number of future occurences
	if ($event['recurrence']['COUNT']) {
	$event['recurrence']['COUNT'] -= $old['_instance'];
	}

	// remove fixed weekday, will be re-set to the new weekday in kolab_calendar::insert_event()
	if (strlen($event['recurrence']['BYDAY']) == 2)
	unset($event['recurrence']['BYDAY']);
	if ($master['recurrence']['BYMONTH'] == gmdate('n', $master['start']))
	unset($event['recurrence']['BYMONTH']);

	$success = $storage->insert_event($event);
	break;
	}

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

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

	$new_start_date = date('Y-m-d', $event['start']);
	$new_start_time = date('H:i', $event['start']);
	$new_duration = $event['end'] - $event['start'];

	$diff = $old_start_date != $new_start_date \|\| $old_start_time != $new_start_time \|\| $old_duration != $new_duration;

	// shifted or resized
	if ($diff && ($old_start_date == $new_start_date \|\| $old_duration == $new_duration)) {
	$event['start'] = $master['start'] + ($event['start'] - $old['start']);
	$event['end'] = $event['start'] + $new_duration;

	// 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'] == gmdate('n', $old['start']))
	unset($event['recurrence']['BYMONTH']);
	}
	}

	$success = $storage->update_event($event);
	break;
	}

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

	return $success;
	}

	/**
	* 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 Strip virtual events (optional)
	* @return array A list of event records
	*/
	public function load_events($start, $end, $search = null, $calendars = null, $virtual = 1)
	{
	if ($calendars && is_string($calendars))
	$calendars = explode(',', $calendars);

	$events = $categories = array();
	foreach ($this->calendars as $cid => $calendar) {
	if ($calendars && !in_array($cid, $calendars))
	continue;

	$events = array_merge($events, $this->calendars[$cid]->list_events($start, $end, $search, $virtual));
	$categories += $this->calendars[$cid]->categories;
	}

	// add new categories to user prefs
	$old_categories = $this->rc->config->get('calendar_categories', array());
	if ($newcats = array_diff(array_map('strtolower', array_keys($categories)), array_map('strtolower', array_keys($old_categories)))) {
	foreach ($newcats as $category)
	$old_categories[$category] = ''; // no color set yet
	$this->rc->user->save_prefs(array('calendar_categories' => $old_categories));
	}

	return $events;
	}

	/**
	* 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->session->get_keep_alive());
	$last -= $last % $interval;

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

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

	$time = $slot + $interval;

	$events = array();
	foreach ($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) as $e) {
	// add to list if alarm is set
	if ($e['_alarm'] && ($notifyat = $e['start'] - $e['_alarm'] * 60) <= $time) {
	$id = $e['id'];
	$events[$id] = $e;
	$events[$id]['notifyat'] = $notifyat;
	}
	}
	}

	// get alarm information stored in local database
	if (!empty($events)) {
	$event_ids = array_map(array($this->rc->db, 'quote'), array_keys($events));
	$result = $this->rc->db->query(sprintf(
	"SELECT * FROM kolab_alarms
	WHERE event_id IN (%s)",
	join(',', $event_ids),
	$this->rc->db->now()
	));

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

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

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

	return $alarms;
	}

	/**
	* Feedback after showing/sending an alarm notification
	*
	* @see calendar_driver::dismiss_alarm()
	*/
	public function dismiss_alarm($event_id, $snooze = 0)
	{
	// 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(
	"REPLACE INTO kolab_alarms
	(event_id, dismissed, notifyat)
	VALUES(?, ?, ?)",
	$event_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 = $this->calendars[$event['calendar']]))
	return false;

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

	return $event['attachments'];
	}

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

	$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
	*/
	public function get_attachment_body($id, $event)
	{
	if (!($storage = $this->calendars[$event['calendar']]))
	return false;

	return $storage->get_attachment_body($id);
	}

	/**
	* 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', array());
	}

	/**
	* Fetch free/busy information from a person within the given range
	*/
	public function get_freebusy_list($email, $start, $end)
	{
	require_once('Horde/iCalendar.php');

	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
	$fbdata = @file_get_contents(kolab_storage::get_freebusy_url($email));

	// 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) {
	$fbcal = new Horde_iCalendar;
	$fbcal->parsevCalendar($fbdata);
	if ($fb = $fbcal->findComponent('vfreebusy')) {
	$result = array();
	$params = $fb->getExtraParams();
	foreach ($fb->getBusyPeriods() as $from => $to) {
	if ($to == null) // no information, assume free
	break;
	$type = $params[$from]['FBTYPE'];
	$result[] = array($from, $to, isset($fbtypemap[$type]) ? $fbtypemap[$type] : calendar::FREEBUSY_BUSY);
	}

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

	$cal = get_input_value('source', RCUBE_INPUT_GPC);
	if (!($cal = $this->calendars[$cal]))
	return false;

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

	exit;
	}

	/**
	* 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, $formfields)
	{
	if ($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'));
	$formfields['name']['value'] = Q(str_replace($delimiter, ' » ', 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'), $folder);
	$form['props']['fieldsets']['location']['content']['path'] = array(
	'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) {
	$colprop['id'] = '_'.$col;
	$label = !empty($colprop['label']) ? $colprop['label'] : rcube_label($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;
	}


	/**
	* 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()
	{
	$calid = get_input_value('_id', RCUBE_INPUT_GPC);
	if ($calid && ($cal = $this->calendars[$calid])) {
	$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);

	// 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'];
	}


	/**
	* Return a (limited) list of color values to be used for calendar and category coloring
	*
	* @return mixed List for colors as hex values or false if no presets should be shown
	*/
	public function get_color_values()
	{
	// selection from http://msdn.microsoft.com/en-us/library/aa358802%28v=VS.85%29.aspx
	return array('000000','006400','2F4F4F','800000','808000','008000',
	'008080','000080','800080','4B0082','191970','8B0000','008B8B',
	'00008B','8B008B','556B2F','8B4513','228B22','6B8E23','2E8B57',
	'B8860B','483D8B','A0522D','0000CD','A52A2A','00CED1','696969',
	'20B2AA','9400D3','B22222','C71585','3CB371','D2691E','DC143C',
	'DAA520','00FA9A','4682B4','7CFC00','9932CC','FF0000','FF4500',
	'FF8C00','FFA500','FFD700','FFFF00','9ACD32','32CD32','00FF00',
	'00FF7F','00FFFF','5F9EA0','00BFFF','0000FF','FF00FF','808080',
	'708090','CD853F','8A2BE2','778899','FF1493','48D1CC','1E90FF',
	'40E0D0','4169E1','6A5ACD','BDB76B','BA55D3','CD5C5C','ADFF2F',
	'66CDAA','FF6347','8FBC8B','DA70D6','BC8F8F','9370DB','DB7093',
	'FF7F50','6495ED','A9A9A9','F4A460','7B68EE','D2B48C','E9967A',
	'DEB887','FF69B4','FA8072','F08080','EE82EE','87CEEB','FFA07A',
	'F0E68C','DDA0DD','90EE90','7FFFD4','C0C0C0','87CEFA','B0C4DE',
	'98FB98','ADD8E6','B0E0E6','D8BFD8','EEE8AA','AFEEEE','D3D3D3',
	'FFDEAD');
	}

	}
	diff --git a/plugins/libkolab/lib/kolab_format.php b/plugins/libkolab/lib/kolab_format.php
	index c72f9ac3..42ecaab8 100644
	--- a/plugins/libkolab/lib/kolab_format.php
	+++ b/plugins/libkolab/lib/kolab_format.php
	@@ -1,210 +1,215 @@
	<?php

	/**
	* Kolab format model class wrapping libkolabxml bindings
	*
	* Abstract base class for different Kolab groupware objects read from/written
	* to the new Kolab 3 format using the PHP bindings of libkolabxml.
	*
	* @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/>.
	*/

	abstract class kolab_format
	{
	public static $timezone;

	protected $obj;
	protected $data;

	/**
	* Factory method to instantiate a kolab_format object of the given type
	*/
	public static function factory($type)
	{
	if (!isset(self::$timezone))
	self::$timezone = new DateTimeZone('UTC');

	$suffix = preg_replace('/[^a-z]+/', '', $type);
	$classname = 'kolab_format_' . $suffix;
	if (class_exists($classname))
	return new $classname();

	return PEAR::raiseError(sprintf("Failed to load Kolab Format wrapper for type %s", $type));
	}

	/**
	* Convert the given date/time value into a cDateTime object
	*
	* @param mixed Date/Time value either as unix timestamp, date string or PHP DateTime object
	* @param DateTimeZone The timezone the date/time is in. Use global default if empty
	* @param boolean True of the given date has no time component
	* @return object The libkolabxml date/time object
	*/
	public static function get_datetime($datetime, $tz = null, $dateonly = false)
	{
	if (!$tz) $tz = self::$timezone;
	$result = new cDateTime();

	// got a unix timestamp (in UTC)
	if (is_numeric($datetime)) {
	$datetime = new DateTime('@'.$datetime, new DateTimeZone('UTC'));
	if ($tz) $datetime->setTimezone($tz);
	}
	else if (is_string($datetime) && strlen($datetime))
	$datetime = new DateTime($datetime, $tz);

	if (is_a($datetime, 'DateTime')) {
	$result->setDate($datetime->format('Y'), $datetime->format('n'), $datetime->format('j'));

	if (!$dateonly)
	$result->setTime($datetime->format('G'), $datetime->format('i'), $datetime->format('s'));

	- if ($tz)
	+ if ($tz && $tz->getName() == 'UTC')
	+ $result->setUTC(true);
	+ else if ($tz)
	$result->setTimezone($tz->getName());
	}

	return $result;
	}

	/**
	* Convert the given cDateTime into a PHP DateTime object
	*
	* @param object cDateTime The libkolabxml datetime object
	* @return object DateTime PHP datetime instance
	*/
	public static function php_datetime($cdt)
	{
	if (!is_object($cdt) \|\| !$cdt->isValid())
	return null;

	$d = new DateTime;
	$d->setTimezone(self::$timezone);

	try {
	if ($tzs = $cdt->timezone()) {
	$tz = new DateTimeZone($tzs);
	$d->setTimezone($tz);
	}
	+ else if ($cdt->isUTC()) {
	+ $d->setTimezone(new DateTimeZone('UTC'));
	+ }
	}
	catch (Exception $e) { }

	$d->setDate($cdt->year(), $cdt->month(), $cdt->day());

	if ($cdt->isDateOnly()) {
	$d->_dateonly = true;
	$d->setTime(12, 0, 0); // set time to noon to avoid timezone troubles
	}
	else {
	$d->setTime($cdt->hour(), $cdt->minute(), $cdt->second());
	}

	return $d;
	}

	/**
	* Convert a libkolabxml vector to a PHP array
	*
	* @param object vector Object
	* @return array Indexed array contaning vector elements
	*/
	public static function vector2array($vec, $max = PHP_INT_MAX)
	{
	$arr = array();
	for ($i=0; $i < $vec->size() && $i < $max; $i++)
	$arr[] = $vec->get($i);
	return $arr;
	}

	/**
	* Build a libkolabxml vector (string) from a PHP array
	*
	* @param array Array with vector elements
	* @return object vectors
	*/
	public static function array2vector($arr)
	{
	$vec = new vectors;
	foreach ((array)$arr as $val) {
	if (strlen($val))
	$vec->push($val);
	}
	return $vec;
	}

	/**
	* Save the last generated UID to the object properties.
	* Should be called after kolabformat::writeXXXX();
	*/
	protected function update_uid()
	{
	// get generated UID
	if (!$this->data['uid']) {
	$this->data['uid'] = kolabformat::getSerializedUID();
	$this->obj->setUid($this->data['uid']);
	}
	}

	/**
	* Direct getter for object properties
	*/
	function __get($var)
	{
	return $this->data[$var];
	}

	/**
	* Load Kolab object data from the given XML block
	*
	* @param string XML data
	*/
	abstract public function load($xml);

	/**
	* Set properties to the kolabformat object
	*
	* @param array Object data as hash array
	*/
	abstract public function set(&$object);

	/**
	*
	*/
	abstract public function is_valid();

	/**
	* Write object data to XML format
	*
	* @return string XML data
	*/
	abstract public function write();

	/**
	* Convert the Kolab object into a hash array data structure
	*
	* @return array Kolab object data as hash array
	*/
	abstract public function to_array();

	/**
	* Load object data from Kolab2 format
	*
	* @param array Hash array with object properties (produced by Horde Kolab_Format classes)
	*/
	abstract public function fromkolab2($object);
	}
	diff --git a/plugins/libkolab/lib/kolab_format_event.php b/plugins/libkolab/lib/kolab_format_event.php
	index f3de4252..97718ef4 100644
	--- a/plugins/libkolab/lib/kolab_format_event.php
	+++ b/plugins/libkolab/lib/kolab_format_event.php
	@@ -1,551 +1,551 @@
	<?php

	/**
	* Kolab Event model class
	*
	* @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 kolab_format_event extends kolab_format
	{
	public $CTYPE = 'application/calendar+xml';

	private $sensitivity_map = array(
	'public' => kolabformat::ClassPublic,
	'private' => kolabformat::ClassPrivate,
	'confidential' => kolabformat::ClassConfidential,
	);

	private $role_map = array(
	'REQ-PARTICIPANT' => kolabformat::Required,
	'OPT-PARTICIPANT' => kolabformat::Optional,
	'NON-PARTICIPANT' => kolabformat::NonParticipant,
	'CHAIR' => kolabformat::Chair,
	);

	private $rrule_type_map = array(
	'MINUTELY' => RecurrenceRule::Minutely,
	'HOURLY' => RecurrenceRule::Hourly,
	'DAILY' => RecurrenceRule::Daily,
	'WEEKLY' => RecurrenceRule::Weekly,
	'MONTHLY' => RecurrenceRule::Monthly,
	'YEARLY' => RecurrenceRule::Yearly,
	);

	private $weekday_map = array(
	'MO' => kolabformat::Monday,
	'TU' => kolabformat::Tuesday,
	'WE' => kolabformat::Wednesday,
	'TH' => kolabformat::Thursday,
	'FR' => kolabformat::Friday,
	'SA' => kolabformat::Saturday,
	'SU' => kolabformat::Sunday,
	);

	private $alarm_type_map = array(
	'DISPLAY' => Alarm::DisplayAlarm,
	'EMAIL' => Alarm::EMailAlarm,
	'AUDIO' => Alarm::AudioAlarm,
	);

	private $status_map = array(
	'UNKNOWN' => kolabformat::PartNeedsAction,
	'NEEDS-ACTION' => kolabformat::PartNeedsAction,
	'TENTATIVE' => kolabformat::PartTentative,
	'ACCEPTED' => kolabformat::PartAccepted,
	'DECLINED' => kolabformat::PartDeclined,
	'DELEGATED' => kolabformat::PartDelegated,
	);

	private $kolab2_rolemap = array(
	'required' => 'REQ-PARTICIPANT',
	'optional' => 'OPT-PARTICIPANT',
	'resource' => 'CHAIR',
	);
	private $kolab2_statusmap = array(
	'none' => 'NEEDS-ACTION',
	'tentative' => 'TENTATIVE',
	'accepted' => 'CONFIRMED',
	'accepted' => 'ACCEPTED',
	'declined' => 'DECLINED',
	);
	private $kolab2_monthmap = array('', 'january', 'february', 'march', 'april', 'may', 'june', 'july', 'august', 'september', 'october', 'november', 'december');


	/**
	* Default constructor
	*/
	function __construct()
	{
	$this->obj = new Event;
	}

	/**
	* Load Contact object data from the given XML block
	*
	* @param string XML data
	*/
	public function load($xml)
	{
	$this->obj = kolabformat::readEvent($xml, false);
	}

	/**
	* Write Contact object data to XML format
	*
	* @return string XML data
	*/
	public function write()
	{
	$xml = kolabformat::writeEvent($this->obj);
	parent::update_uid();
	return $xml;
	}

	/**
	* Set contact properties to the kolabformat object
	*
	* @param array Contact data as hash array
	*/
	public function set(&$object)
	{
	// set some automatic values if missing
	if (!$this->obj->created()) {
	if (!empty($object['created']))
	$object['created'] = new DateTime('now', self::$timezone);
	$this->obj->setCreated(self::get_datetime($object['created']));
	}

	if (!empty($object['uid']))
	$this->obj->setUid($object['uid']);

	// TODO: increase sequence
	// $this->obj->setSequence($this->obj->sequence()+1);

	// do the hard work of setting object values
	$this->obj->setStart(self::get_datetime($object['start'], null, $object['allday']));
	$this->obj->setEnd(self::get_datetime($object['end'], null, $object['allday']));
	$this->obj->setSummary($object['title']);
	$this->obj->setLocation($object['location']);
	$this->obj->setDescription($object['description']);
	$this->obj->setPriority($object['priority']);
	$this->obj->setClassification($this->sensitivity_map[$object['sensitivity']]);
	$this->obj->setCategories(self::array2vector($object['categories']));
	$this->obj->setTransparency($object['free_busy'] == 'free');

	$status = kolabformat::StatusUndefined;
	if ($object['free_busy'] == 'tentative')
	$status = kolabformat::StatusTentative;
	if ($object['cancelled'])
	$status = kolabformat::StatusCancelled;
	$this->obj->setStatus($status);

	// process event attendees
	$organizer = new ContactReference;
	$attendees = new vectorattendee;
	foreach ((array)$object['attendees'] as $attendee) {
	$cr = new ContactReference(ContactReference::EmailReference, $attendee['email']);
	$cr->setName($attendee['name']);

	if ($attendee['role'] == 'ORGANIZER') {
	$organizer = $cr;
	}
	else {
	$att = new Attendee;
	$att->setContact($cr);
	$att->setPartStat($this->status_map[$attendee['status']]);
	$att->setRole($this->role_map[$attendee['role']] ? $this->role_map[$attendee['role']] : kolabformat::Required);
	$att->setRSVP((bool)$attendee['rsvp']);

	if ($att->isValid()) {
	$attendees->push($att);
	}
	else {
	raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Invalid event attendee: " . json_encode($attendee),
	), true);
	}
	}
	}
	$this->obj->setOrganizer($organizer);
	$this->obj->setAttendees($attendees);

	// save recurrence rule
	if ($object['recurrence']) {
	$rr = new RecurrenceRule;
	$rr->setFrequency($this->rrule_type_map[$object['recurrence']['FREQ']]);

	if ($object['recurrence']['INTERVAL'])
	$rr->setInterval(intval($object['recurrence']['INTERVAL']));

	if ($object['recurrence']['BYDAY']) {
	$byday = new vectordaypos;
	foreach (explode(',', $object['recurrence']['BYDAY']) as $day) {
	$occurrence = 0;
	if (preg_match('/^([\d-]+)([A-Z]+)$/', $day, $m)) {
	$occurrence = intval($m[1]);
	$day = $m[2];
	}
	if (isset($this->weekday_map[$day]))
	$byday->push(new DayPos($occurrence, $this->weekday_map[$day]));
	}
	$rr->setByday($byday);
	}

	if ($object['recurrence']['BYMONTHDAY']) {
	$bymday = new vectori;
	foreach (explode(',', $object['recurrence']['BYMONTHDAY']) as $day)
	$bymday->push(intval($day));
	$rr->setBymonthday($bymday);
	}

	if ($object['recurrence']['BYMONTH']) {
	$bymonth = new vectori;
	foreach (explode(',', $object['recurrence']['BYMONTH']) as $month)
	$bymonth->push(intval($month));
	$rr->setBymonth($bymonth);
	}

	if ($object['recurrence']['COUNT'])
	$rr->setCount(intval($object['recurrence']['COUNT']));
	else if ($object['recurrence']['UNTIL'])
	$rr->setEnd(self::get_datetime($object['recurrence']['UNTIL'], null, true));

	if ($rr->isValid()) {
	$this->obj->setRecurrenceRule($rr);

	// add exception dates (only if recurrence rule is valid)
	$exdates = new vectordatetime;
	foreach ((array)$object['recurrence']['EXDATE'] as $exdate)
	$exdates->push(self::get_datetime($exdate, null, true));
	$this->obj->setExceptionDates($exdates);
	}
	else {
	raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Invalid event recurrence rule: " . json_encode($object['recurrence']),
	), true);
	}
	}

	// save alarm
	$valarms = new vectoralarm;
	if ($object['alarms']) {
	list($offset, $type) = explode(":", $object['alarms']);

	if ($type == 'EMAIL') { // email alarms implicitly go to event owner
	$recipients = new vectorcontactref;
	$recipients->push(new ContactReference(ContactReference::EmailReference, $object['_owner']));
	$alarm = new Alarm($object['title'], strval($object['description']), $recipients);
	}
	else { // default: display alarm
	$alarm = new Alarm($object['title']);
	}

	if (preg_match('/^@(\d+)/', $offset, $d)) {
	- $alarm->setStart(self::get_datetime($d[1]));
	+ $alarm->setStart(self::get_datetime($d[1], new DateTimeZone('UTC')));
	}
	else if (preg_match('/^([-+]?)(\d+)([SMHDW])/', $offset, $d)) {
	$days = $hours = $minutes = $seconds = 0;
	switch ($d[3]) {
	case 'W': $days = 7*intval($d[2]); break;
	case 'D': $days = intval($d[2]); break;
	case 'H': $hours = intval($d[2]); break;
	case 'M': $minutes = intval($d[2]); break;
	case 'S': $seconds = intval($d[2]); break;
	}
	$alarm->setRelativeStart(new Duration($days, $hours, $minutes, $seconds, $d[1] == '-'), $d[1] == '-' ? kolabformat::Start : kolabformat::End);
	}

	$valarms->push($alarm);
	}
	$this->obj->setAlarms($valarms);

	// TODO: save attachments

	// cache this data
	unset($object['_formatobj']);
	$this->data = $object;
	}

	/**
	*
	*/
	public function is_valid()
	{
	return $this->data \|\| (is_object($this->obj) && $this->obj->isValid());
	}

	/**
	* Convert the Contact object into a hash array data structure
	*
	* @return array Contact data as hash array
	*/
	public function to_array()
	{
	// return cached result
	if (!empty($this->data))
	return $this->data;

	$sensitivity_map = array_flip($this->sensitivity_map);

	// read object properties
	$object = array(
	'uid' => $this->obj->uid(),
	'changed' => self::php_datetime($this->obj->lastModified()),
	'title' => $this->obj->summary(),
	'location' => $this->obj->location(),
	'description' => $this->obj->description(),
	'allday' => $this->obj->start()->isDateOnly(),
	'start' => self::php_datetime($this->obj->start()),
	'end' => self::php_datetime($this->obj->end()),
	'categories' => self::vector2array($this->obj->categories()),
	'free_busy' => $this->obj->transparency() ? 'free' : 'busy', // TODO: transparency is only boolean
	'sensitivity' => $sensitivity_map[$this->obj->classification()],
	'priority' => $this->obj->priority(),
	);

	// status defines different event properties...
	$status = $this->obj->status();
	if ($status == kolabformat::StatusTentative)
	$object['free_busy'] = 'tentative';
	else if ($status == kolabformat::StatusCancelled)
	$objec['cancelled'] = true;

	// read organizer and attendees
	if ($organizer = $this->obj->organizer()) {
	$object['attendees'][] = array(
	'role' => 'ORGANIZER',
	'email' => $organizer->email(),
	'name' => $organizer->name(),
	);
	}

	$role_map = array_flip($this->role_map);
	$status_map = array_flip($this->status_map);
	$attvec = $this->obj->attendees();
	for ($i=0; $i < $attvec->size(); $i++) {
	$attendee = $attvec->get($i);
	$cr = $attendee->contact();
	$object['attendees'][] = array(
	'role' => $role_map[$attendee->role()],
	'status' => $status_map[$attendee->partStat()],
	'rsvp' => $attendee->rsvp(),
	'email' => $cr->email(),
	'name' => $cr->name(),
	);
	}

	// read recurrence rule
	if (($rr = $this->obj->recurrenceRule()) && $rr->isValid()) {
	$rrule_type_map = array_flip($this->rrule_type_map);
	$object['recurrence'] = array('FREQ' => $rrule_type_map[$rr->frequency()]);

	if ($intvl = $rr->interval())
	$object['recurrence']['INTERVAL'] = $intvl;

	if (($count = $rr->count()) && $count > 0) {
	$object['recurrence']['COUNT'] = $count;
	}
	else if ($until = self::php_datetime($rr->end())) {
	$until->setTime($object['start']->format('G'), $object['start']->format('i'), 0);
	$object['recurrence']['UNTIL'] = $until->format('U');
	}

	if (($byday = $rr->byday()) && $byday->size()) {
	$weekday_map = array_flip($this->weekday_map);
	$weekdays = array();
	for ($i=0; $i < $byday->size(); $i++) {
	$daypos = $byday->get($i);
	$prefix = $daypos->occurence();
	$weekdays[] = ($prefix ? $prefix : '') . $weekday_map[$daypos->weekday()];
	}
	$object['recurrence']['BYDAY'] = join(',', $weekdays);
	}

	if (($bymday = $rr->bymonthday()) && $bymday->size()) {
	$object['recurrence']['BYMONTHDAY'] = join(',', self::vector2array($bymday));
	}

	if (($bymonth = $rr->bymonth()) && $bymonth->size()) {
	$object['recurrence']['BYMONTH'] = join(',', self::vector2array($bymonth));
	}

	if ($exceptions = $this->obj->exceptionDates()) {
	for ($i=0; $i < $exceptions->size(); $i++) {
	if ($exdate = self::php_datetime($exceptions->get($i)))
	$object['recurrence']['EXDATE'][] = $exdate->format('U');
	}
	}
	}

	// read alarm
	$valarms = $this->obj->alarms();
	$alarm_types = array_flip($this->alarm_type_map);
	for ($i=0; $i < $valarms->size(); $i++) {
	$alarm = $valarms->get($i);
	$type = $alarm_types[$alarm->type()];

	if ($type == 'DISPLAY' \|\| $type == 'EMAIL') { // only DISPLAY and EMAIL alarms are supported
	if ($start = self::php_datetime($alarm->start())) {
	$object['alarms'] = '@' . $start->format('U');
	}
	else if ($offset = $alarm->relativeStart()) {
	$value = $alarm->relativeTo() == kolabformat::End ? '+' : '-';
	if ($w = $offset->weeks()) $value .= $w . 'W';
	else if ($d = $offset->days()) $value .= $d . 'D';
	else if ($h = $offset->hours()) $value .= $h . 'H';
	else if ($m = $offset->minutes()) $value .= $m . 'M';
	else if ($s = $offset->seconds()) $value .= $s . 'S';
	else continue;

	$object['alarms'] = $value;
	}
	$object['alarms'] .= ':' . $type;
	break;
	}
	}

	// TODO: handle attachments

	$this->data = $object;
	return $this->data;
	}

	/**
	* Load data from old Kolab2 format
	*/
	public function fromkolab2($rec)
	{
	if (PEAR::isError($rec))
	return;

	$start_time = date('H:i:s', $rec['start-date']);
	$allday = $rec['_is_all_day'] \|\| ($start_time == '00:00:00' && $start_time == date('H:i:s', $rec['end-date']));

	// in Roundcube all-day events go from 12:00 to 13:00
	if ($allday) {
	$now = new DateTime('now', self::$timezone);
	$gmt_offset = $now->getOffset();

	$rec['start-date'] += 12 * 3600;
	$rec['end-date'] -= 11 * 3600;
	$rec['end-date'] -= $gmt_offset - date('Z', $rec['end-date']); // shift times from server's timezone to user's timezone
	$rec['start-date'] -= $gmt_offset - date('Z', $rec['start-date']); // because generated with mktime() in Horde_Kolab_Format_Date::decodeDate()
	// sanity check
	if ($rec['end-date'] <= $rec['start-date'])
	$rec['end-date'] += 86400;
	}

	// convert alarm time into internal format
	if ($rec['alarm']) {
	$alarm_value = $rec['alarm'];
	$alarm_unit = 'M';
	if ($rec['alarm'] % 1440 == 0) {
	$alarm_value /= 1440;
	$alarm_unit = 'D';
	}
	else if ($rec['alarm'] % 60 == 0) {
	$alarm_value /= 60;
	$alarm_unit = 'H';
	}
	$alarm_value *= -1;
	}

	// convert recurrence rules into internal pseudo-vcalendar format
	if ($recurrence = $rec['recurrence']) {
	$rrule = array(
	'FREQ' => strtoupper($recurrence['cycle']),
	'INTERVAL' => intval($recurrence['interval']),
	);

	if ($recurrence['range-type'] == 'number')
	$rrule['COUNT'] = intval($recurrence['range']);
	else if ($recurrence['range-type'] == 'date')
	$rrule['UNTIL'] = $recurrence['range'];

	if ($recurrence['day']) {
	$byday = array();
	$prefix = ($rrule['FREQ'] == 'MONTHLY' \|\| $rrule['FREQ'] == 'YEARLY') ? intval($recurrence['daynumber'] ? $recurrence['daynumber'] : 1) : '';
	foreach ($recurrence['day'] as $day)
	$byday[] = $prefix . substr(strtoupper($day), 0, 2);
	$rrule['BYDAY'] = join(',', $byday);
	}
	if ($recurrence['daynumber']) {
	if ($recurrence['type'] == 'monthday' \|\| $recurrence['type'] == 'daynumber')
	$rrule['BYMONTHDAY'] = $recurrence['daynumber'];
	else if ($recurrence['type'] == 'yearday')
	$rrule['BYYEARDAY'] = $recurrence['daynumber'];
	}
	if ($recurrence['month']) {
	$monthmap = array_flip($this->kolab2_monthmap);
	$rrule['BYMONTH'] = strtolower($monthmap[$recurrence['month']]);
	}

	if ($recurrence['exclusion']) {
	foreach ((array)$recurrence['exclusion'] as $excl)
	$rrule['EXDATE'][] = strtotime($excl . date(' H:i:s', $rec['start-date'])); // use time of event start
	}
	}

	$attendees = array();
	if ($rec['organizer']) {
	$attendees[] = array(
	'role' => 'ORGANIZER',
	'name' => $rec['organizer']['display-name'],
	'email' => $rec['organizer']['smtp-address'],
	'status' => 'ACCEPTED',
	);
	$_attendees .= $rec['organizer']['display-name'] . ' ' . $rec['organizer']['smtp-address'] . ' ';
	}

	foreach ((array)$rec['attendee'] as $attendee) {
	$attendees[] = array(
	'role' => $this->kolab2_rolemap[$attendee['role']],
	'name' => $attendee['display-name'],
	'email' => $attendee['smtp-address'],
	'status' => $this->kolab2_statusmap[$attendee['status']],
	'rsvp' => $attendee['request-response'],
	);
	$_attendees .= $rec['organizer']['display-name'] . ' ' . $rec['organizer']['smtp-address'] . ' ';
	}

	$this->data = array(
	'uid' => $rec['uid'],
	'title' => $rec['summary'],
	'location' => $rec['location'],
	'description' => $rec['body'],
	'start' => $rec['start-date'],
	'end' => $rec['end-date'],
	'allday' => $allday,
	'recurrence' => $rrule,
	'alarms' => $alarm_value . $alarm_unit,
	'categories' => explode(',', $rec['categories']),
	'attachments' => $attachments,
	'attendees' => $attendees,
	'free_busy' => $rec['show-time-as'],
	'priority' => $rec['priority'],
	'sensitivity' => $rec['sensitivity'],
	'changed' => $rec['last-modification-date'],
	);
	}
	}
	diff --git a/plugins/libkolab/lib/kolab_storage_folder.php b/plugins/libkolab/lib/kolab_storage_folder.php
	index fa2d697b..bf83f64f 100644
	--- a/plugins/libkolab/lib/kolab_storage_folder.php
	+++ b/plugins/libkolab/lib/kolab_storage_folder.php
	@@ -1,685 +1,712 @@
	<?php

	/**
	* The kolab_storage_folder class represents an IMAP folder on the Kolab server.
	*
	* @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 kolab_storage_folder
	{
	const KTYPE_PREFIX = 'application/x-vnd.kolab.';

	/**
	* The folder name.
	*
	* @var string
	*/
	public $name;

	/**
	* The type of this folder.
	*
	* @var string
	*/
	public $type;

	private $type_annotation;
	private $subpath;
	private $imap;
	private $info;
	private $owner;
	private $objcache = array();
	private $uid2msg = array();


	/**
	* Default constructor
	*/
	function __construct($name, $imap = null)
	{
	$this->imap = is_object($imap) ? $imap : rcmail::get_instance()->get_storage();
	$this->imap->set_options(array('skip_deleted' => false));
	$this->set_folder($name);
	}


	/**
	* Set the IMAP folder name this instance connects to
	*
	* @param string The folder name/path
	*/
	public function set_folder($name)
	{
	$this->name = $name;
	$this->imap->set_folder($this->name);

	$metadata = $this->imap->get_metadata($this->name, array(kolab_storage::CTYPE_KEY));
	$this->type_annotation = $metadata[$this->name][kolab_storage::CTYPE_KEY];
	$this->type = reset(explode('.', $this->type_annotation));
	}


	/**
	*
	*/
	private function get_folder_info()
	{
	if (!isset($this->info))
	$this->info = $this->imap->folder_info($this->name);

	return $this->info;
	}


	/**
	* Returns IMAP metadata/annotations (GETMETADATA/GETANNOTATION)
	*
	* @param array List of metadata keys to read
	* @return array Metadata entry-value hash array on success, NULL on error
	*/
	public function get_metadata($keys)
	{
	$metadata = $this->imap->get_metadata($this->name, (array)$keys);
	return $metadata[$this->name];
	}


	/**
	* Sets IMAP metadata/annotations (SETMETADATA/SETANNOTATION)
	*
	* @param array $entries Entry-value array (use NULL value as NIL)
	* @return boolean True on success, False on failure
	*/
	public function set_metadata($entries)
	{
	return $this->imap->set_metadata($this->name, $entries);
	}


	/**
	* Returns the owner of the folder.
	*
	* @return string The owner of this folder.
	*/
	public function get_owner()
	{
	// return cached value
	if (isset($this->owner))
	return $this->owner;

	$info = $this->get_folder_info();
	$rcmail = rcmail::get_instance();

	switch ($info['namespace']) {
	case 'personal':
	$this->owner = $rcmail->user->get_username();
	break;

	case 'shared':
	$this->owner = 'anonymous';
	break;

	default:
	$owner = '';
	list($prefix, $user) = explode($this->imap->get_hierarchy_delimiter(), $info['name']);
	if (strpos($user, '@') === false) {
	$domain = strstr($rcmail->user->get_username(), '@');
	if (!empty($domain))
	$user .= $domain;
	}
	$this->owner = $user;
	break;
	}

	return $this->owner;
	}


	/**
	* 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()
	{
	return $this->imap->folder_namespace($this->name);
	}


	/**
	* Get IMAP ACL information for this folder
	*
	* @return string Permissions as string
	*/
	public function get_acl()
	{
	return join('', (array)$this->imap->get_acl($this->name));
	}


	/**
	* Check subscription status of this folder
	*
	* @param string Subscription type (kolab_storage::SERVERSIDE_SUBSCRIPTION or kolab_storage::CLIENTSIDE_SUBSCRIPTION)
	* @return boolean True if subscribed, false if not
	*/
	public function is_subscribed($type = 0)
	{
	static $subscribed; // local cache

	if ($type == kolab_storage::SERVERSIDE_SUBSCRIPTION) {
	if (!$subscribed)
	$subscribed = $this->imap->list_folders_subscribed();

	return in_array($this->name, $subscribed);
	}
	else if (kolab_storage::CLIENTSIDE_SUBSCRIPTION) {
	// TODO: implement this
	return true;
	}

	return false;
	}

	/**
	* Change subscription status of this folder
	*
	* @param boolean The desired subscription status: true = subscribed, false = not subscribed
	* @param string Subscription type (kolab_storage::SERVERSIDE_SUBSCRIPTION or kolab_storage::CLIENTSIDE_SUBSCRIPTION)
	* @return True on success, false on error
	*/
	public function subscribe($subscribed, $type = 0)
	{
	if ($type == kolab_storage::SERVERSIDE_SUBSCRIPTION) {
	return $subscribed ? $this->imap->subscribe($this->name) : $this->imap->unsubscribe($this->name);
	}
	else {
	// TODO: implement this
	}

	return false;
	}


	/**
	* Get number of objects stored in this folder
	*
	* @param string $type Object type (e.g. contact, event, todo, journal, note, configuration)
	* @return integer The number of objects of the given type
	*/
	public function count($type = null)
	{
	if (!$type) $type = $this->type;

	// search by object type
	$ctype = self::KTYPE_PREFIX . $type;
	$index = $this->imap->search_once($this->name, 'UNDELETED HEADER X-Kolab-Type ' . $ctype);

	return $index->count();
	}

	/**
	* List all Kolab objects of the given type
	*
	* @param string $type Object type (e.g. contact, event, todo, journal, note, configuration)
	* @return array List of Kolab data objects (each represented as hash array)
	*/
	public function get_objects($type = null)
	{
	if (!$type) $type = $this->type;

	// search by object type
	$ctype = self::KTYPE_PREFIX . $type;
	$search = 'UNDELETED HEADER X-Kolab-Type ' . $ctype;

	$index = $this->imap->search_once($this->name, $search);
	$results = array();

	// fetch all messages from IMAP
	foreach ($index->get() as $msguid) {
	if ($object = $this->read_object($msguid, $type)) {
	$results[] = $object;
	$this->uid2msg[$object['uid']] = $msguid;
	}
	}

	// TODO: write $this->uid2msg to cache

	return $results;
	}


	/**
	* Getter for a single Kolab object, identified by its UID
	*
	* @param string Object UID
	* @return array The Kolab object represented as hash array
	*/
	public function get_object($uid)
	{
	$msguid = $this->uid2msguid($uid);
	if ($msguid && ($object = $this->read_object($msguid)))
	return $object;

	return false;
	}


	/**
	* Fetch a Kolab object attachment which is stored in a separate part
	* of the mail MIME message that represents the Kolab record.
	*
	* @param string Object's UID
	* @param string The attachment's mime number
	* @param string IMAP folder where message is stored;
	* If set, that also implies that the given UID is an IMAP UID
	* @return mixed The attachment content as binary string
	*/
	public function get_attachment($uid, $part, $mailbox = null)
	{
	if ($msguid = ($mailbox ? $uid : $this->uid2msguid($uid))) {
	if ($mailbox)
	$this->imap->set_folder($mailbox);

	return $this->imap->get_message_part($msguid, $part);
	}

	return null;
	}


	/**
	* Fetch the mime message from the storage server and extract
	* the Kolab groupware object from it
	*
	* @param string The IMAP message UID to fetch
	* @param string The object type expected
	* @param string The folder name where the message is stored
	* @return mixed Hash array representing the Kolab object, a kolab_format instance or false if not found
	*/
	private function read_object($msguid, $type = null, $folder = null)
	{
	if (!$type) $type = $this->type;
	if (!$folder) $folder = $this->name;
	$ctype= self::KTYPE_PREFIX . $type;

	// requested message not in local cache
	if ($this->objcache[$msguid])
	return $this->objcache[$msguid];

	$this->imap->set_folder($folder);
	$message = new rcube_message($msguid);
	$attachments = array();

	// get XML part
	foreach ((array)$message->attachments as $part) {
	if (!$xml && ($part->mimetype == $ctype \|\| preg_match('!application/([a-z]+\+)?xml!', $part->mimetype))) {
	$xml = $part->body ? $part->body : $message->get_part_content($part->mime_id);
	}
	else if ($part->filename) {
	$attachments[$part->filename] = array(
	'key' => $part->mime_id,
	'type' => $part->mimetype,
	'size' => $part->size,
	);
	}
	}

	if (!$xml) {
	raise_error(array(
	'code' => 600,
	'type' => 'php',
	'file' => __FILE__,
	'line' => __LINE__,
	'message' => "Could not find Kolab data part in message $msguid ($this->name).",
	), true);
	return false;
	}

	$format = kolab_format::factory($type);

	// check kolab format version
	if (strpos($xml, '<' . $type) !== false) {
	// old Kolab 2.0 format detected
	$handler = Horde_Kolab_Format::factory('XML', $type);
	if (is_object($handler) && is_a($handler, 'PEAR_Error')) {
	continue;
	}

	// XML-to-array
	$object = $handler->load($xml);
	$format->fromkolab2($object);
	}
	else {
	// load Kolab 3 format using libkolabxml
	$format->load($xml);
	}

	if ($format->is_valid()) {
	if ($formatobj)
	return $format;

	$object = $format->to_array();
	$object['_msguid'] = $msguid;
	$object['_mailbox'] = $this->name;
	$object['_attachments'] = $attachments;
	$object['_formatobj'] = $format;

	$this->objcache[$msguid] = $object;
	return $object;
	}

	return false;
	}


	/**
	* Save an object in this folder.
	*
	* @param array $object The array that holds the data of the object.
	* @param string $type The type of the kolab object.
	* @param string $uid The UID of the old object if it existed before
	* @return boolean True on success, false on error
	*/
	public function save(&$object, $type = null, $uid = null)
	{
	if (!$type)
	$type = $this->type;

	// copy attachments from old message
	if (!empty($object['_msguid']) && ($old = $this->read_object($object['_msguid'], $type, $object['_mailbox']))) {
	foreach ($old['_attachments'] as $name => $att) {
	if (!isset($object['_attachments'][$name])) {
	$object['_attachments'][$name] = $old['_attachments'][$name];
	}
	// load photo.attachment from old Kolab2 format to be directly embedded in xcard block
	if ($name == 'photo.attachment' && !isset($object['photo']) && !$object['_attachments'][$name]['content'] && $att['key']) {
	$object['photo'] = $this->get_attachment($object['_msguid'], $att['key'], $object['_mailbox']);
	unset($object['_attachments'][$name]);
	}
	}
	}

	if ($raw_msg = $this->build_message($object, $type)) {
	$result = $this->imap->save_message($this->name, $raw_msg, '', false);

	// delete old message
	if ($result && !empty($object['_msguid']) && !empty($object['_mailbox'])) {
	$this->imap->delete_message($object['_msguid'], $object['_mailbox']);
	}
	else if ($result && $uid && ($msguid = $this->uid2msguid($uid))) {
	$this->imap->delete_message($msguid, $this->name);
	}

	// TODO: update cache with new UID
	$this->uid2msg[$object['uid']] = $result;
	}

	return $result;
	}


	/**
	* Delete the specified object from this folder.
	*
	* @param mixed $object The Kolab object to delete or object UID
	* @param boolean $expunge Should the folder be expunged?
	* @param boolean $trigger Should the folder update be triggered?
	*
	* @return boolean True if successful, false on error
	*/
	public function delete($object, $expunge = true, $trigger = true)
	{
	$msguid = is_array($object) ? $object['_msguid'] : $this->uid2msguid($object);

	if ($msguid && $expunge) {
	return $this->imap->delete_message($msguid, $this->name);
	}
	else if ($msguid) {
	return $this->imap->set_flag($msguid, 'DELETED', $this->name);
	}

	return false;
	}


	/**
	*
	*/
	public function delete_all()
	{
	return $this->imap->clear_folder($this->name);
	}


	/**
	* Restore a previously deleted object
	*
	* @param string Object UID
	* @return mixed Message UID on success, false on error
	*/
	public function undelete($uid)
	{
	if ($msguid = $this->uid2msguid($uid, true)) {
	if ($this->imap->set_flag($msguid, 'UNDELETED', $this->name)) {
	return $msguid;
	}
	}

	return false;
	}


	+ /**
	+ * Move a Kolab object message to another IMAP folder
	+ *
	+ * @param string Object UID
	+ * @param string IMAP folder to move object to
	+ * @return boolean True on success, false on failure
	+ */
	+ public function move($uid, $target_folder)
	+ {
	+ if ($msguid = $this->uid2msguid($uid)) {
	+ if ($success = $this->imap->move_message($msguid, $target_folder, $this->name)) {
	+ // TODO: update cache
	+ return true;
	+ }
	+ else {
	+ raise_error(array(
	+ 'code' => 600, 'type' => 'php',
	+ 'file' => __FILE__, 'line' => __LINE__,
	+ 'message' => "Failed to move message $msguid to $target_folder: " . $this->imap->get_error_str(),
	+ ), true);
	+ }
	+ }
	+
	+ return false;
	+ }
	+
	+
	/**
	* Resolve an object UID into an IMAP message UID
	*/
	private function uid2msguid($uid, $deleted = false)
	{
	if (!isset($this->uid2msg[$uid])) {
	// use IMAP SEARCH to get the right message
	$index = $this->imap->search_once($this->name, ($deleted ? '' : 'UNDELETED ') . 'HEADER SUBJECT ' . $uid);
	$results = $index->get();
	$this->uid2msg[$uid] = $results[0];

	// TODO: cache this lookup
	}

	return $this->uid2msg[$uid];
	}


	/**
	* Creates source of the configuration object message
	*/
	private function build_message(&$object, $type)
	{
	// load old object to preserve data we don't understand/process
	if (is_object($object['_formatobj']))
	$format = $object['_formatobj'];
	else if ($object['_msguid'] && ($old = $this->read_object($object['_msguid'], $type, $object['_mailbox'])))
	$format = $old['_formatobj'];

	// create new kolab_format instance
	if (!$format)
	$format = kolab_format::factory($type);

	$format->set($object);
	$xml = $format->write();
	$object['uid'] = $format->uid; // get read UID from format

	if (!$format->is_valid() \|\| empty($object['uid'])) {
	return false;
	}

	$mime = new Mail_mime("\r\n");
	$rcmail = rcmail::get_instance();
	$headers = array();

	if ($ident = $rcmail->user->get_identity()) {
	$headers['From'] = $ident['email'];
	$headers['To'] = $ident['email'];
	}
	$headers['Date'] = date('r');
	$headers['X-Kolab-Type'] = self::KTYPE_PREFIX . $type;
	$headers['Subject'] = $object['uid'];
	// $headers['Message-ID'] = rcmail_gen_message_id();
	$headers['User-Agent'] = $rcmail->config->get('useragent');

	$mime->headers($headers);
	$mime->setTXTBody('This is a Kolab Groupware object. '
	. 'To view this object you will need an email client that understands the Kolab Groupware format. '
	. "For a list of such email clients please visit http://www.kolab.org/\n\n");

	$mime->addAttachment($xml,
	$format->CTYPE,
	'kolab.xml',
	false, '8bit', 'attachment', RCMAIL_CHARSET, '', '',
	$rcmail->config->get('mime_param_folding') ? 'quoted-printable' : null,
	$rcmail->config->get('mime_param_folding') == 2 ? 'quoted-printable' : null,
	'', RCMAIL_CHARSET
	);

	// save object attachments as separate parts
	// TODO: optimize memory consumption by using tempfiles for transfer
	foreach ((array)$object['_attachments'] as $name => $att) {
	if (empty($att['content']) && !empty($att['key'])) {
	$msguid = !empty($object['_msguid']) ? $object['_msguid'] : $object['uid'];
	$att['content'] = $this->get_attachment($msguid, $att['key'], $object['_mailbox']);
	}
	if (!empty($att['content'])) {
	$mime->addAttachment($att['content'], $att['type'], $name, false);
	}
	}

	return $mime->getMessage();
	}


	/**
	* Triggers any required updates after changes within the
	* folder. This is currently only required for handling free/busy
	* information with Kolab.
	*
	* @return boolean\|PEAR_Error True if successfull.
	*/
	public function trigger()
	{
	$owner = $this->get_owner();

	switch($this->type) {
	case 'event':
	$url = sprintf('%s/trigger/%s/%s.pfb', kolab_storage::get_freebusy_server(), $owner, $this->subpath);
	break;

	default:
	return true;
	}

	$result = $this->trigger_url($url);
	if (is_a($result, 'PEAR_Error')) {
	return PEAR::raiseError(sprintf("Failed triggering folder %s. Error was: %s",
	$this->name, $result->getMessage()));
	}
	return $result;
	}

	/**
	* Triggers a URL.
	*
	* @param string $url The URL to be triggered.
	* @return boolean\|PEAR_Error True if successfull.
	*/
	private function trigger_url($url)
	{
	// TBD.
	return PEAR::raiseError("Feature not implemented.");
	}


	/* Legacy methods to keep compatibility with the old Horde Kolab_Storage classes */

	/**
	* Compatibility method
	*/
	public function getOwner()
	{
	console("Call to deprecated method kolab_storage_folder::getOwner()");
	return $this->get_owner();
	}

	/**
	* Get IMAP ACL information for this folder
	*/
	public function getMyRights()
	{
	return $this->get_acl();
	}

	/**
	* NOP to stay compatible with the formerly used Horde classes
	*/
	public function getData()
	{
	return $this;
	}

	/**
	* List all Kolab objects of the given type
	*/
	public function getObjects($type = null)
	{
	return $this->get_objects($type);
	}

	/**
	* Getter for a single Kolab object, identified by its UID
	*/
	public function getObject($uid)
	{
	return $this->get_object($uid);
	}

	/**
	*
	*/
	public function getAttachment($key)
	{
	PEAR::raiseError("Call to deprecated method not returning anything.");
	return null;
	}

	/**
	* Alias function of delete()
	*/
	public function deleteMessage($id, $trigger = true, $expunge = true)
	{
	return $this->delete(array('_msguid' => $id), $trigger, $expunge);
	}

	/**
	*
	*/
	public function deleteAll()
	{
	return $this->delete_all();
	}


	}

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