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	diff --git a/plugins/kolab_folders/kolab_folders.php b/plugins/kolab_folders/kolab_folders.php
	index 3f83847a..c8def8fe 100644
	--- a/plugins/kolab_folders/kolab_folders.php
	+++ b/plugins/kolab_folders/kolab_folders.php
	@@ -1,543 +1,528 @@
	<?php

	/**
	* Type-aware folder management/listing for Kolab
	*
	* @version @package_version@
	* @author Aleksander Machniak <machniak@kolabsys.com>
	*
	* Copyright (C) 2011, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	class kolab_folders extends rcube_plugin
	{
	public $task = '?(?!login).*';

	public $types = array('mail', 'event', 'journal', 'task', 'note', 'contact', 'configuration');
	public $mail_types = array('inbox', 'drafts', 'sentitems', 'outbox', 'wastebasket', 'junkemail');

	private $rc;
	private static $instance;


	/**
	* Plugin initialization.
	*/
	function init()
	{
	self::$instance = $this;
	$this->rc = rcmail::get_instance();

	// load required plugin
	$this->require_plugin('libkolab');

	// Folder listing hooks
	$this->add_hook('storage_folders', array($this, 'mailboxes_list'));

	// Folder manager hooks
	$this->add_hook('folder_form', array($this, 'folder_form'));
	$this->add_hook('folder_update', array($this, 'folder_save'));
	$this->add_hook('folder_create', array($this, 'folder_save'));
	$this->add_hook('folder_delete', array($this, 'folder_save'));
	$this->add_hook('folder_rename', array($this, 'folder_save'));
	$this->add_hook('folders_list', array($this, 'folders_list'));
	}

	/**
	* Handler for mailboxes_list hook. Enables type-aware lists filtering.
	*/
	function mailboxes_list($args)
	{
	// infinite loop prevention
	if ($this->is_processing) {
	return $args;
	}

	if (!$this->metadata_support()) {
	return $args;
	}

	$this->is_processing = true;

	// get folders
	$folders = kolab_storage::list_folders($args['root'], $args['name'], $args['filter'], $args['mode'] == 'LSUB', $folderdata);

	$this->is_processing = false;

	if (!is_array($folders)) {
	return $args;
	}

	// Create default folders
	if ($args['root'] == '' && $args['name'] = '*') {
	$this->create_default_folders($folders, $args['filter'], $folderdata);
	}

	$args['folders'] = $folders;

	return $args;
	}

	/**
	* Handler for folders_list hook. Add css classes to folder rows.
	*/
	function folders_list($args)
	{
	if (!$this->metadata_support()) {
	return $args;
	}

	$table = $args['table'];
	$storage = $this->rc->get_storage();

	// get folders types
	$folderdata = $storage->get_metadata('*', kolab_storage::CTYPE_KEY);

	if (!is_array($folderdata)) {
	return $args;
	}

	// Add type-based style for table rows
	// See kolab_folders::folder_class_name()
	for ($i=1, $cnt=$table->size(); $i<=$cnt; $i++) {
	$attrib = $table->get_row_attribs($i);
	$folder = $attrib['foldername']; // UTF7-IMAP
	$type = !empty($folderdata[$folder]) ? $folderdata[$folder][kolab_storage::CTYPE_KEY] : null;

	if (!$type)
	$type = 'mail';

	$class_name = self::folder_class_name($type);

	$attrib['class'] = trim($attrib['class'] . ' ' . $class_name);
	$table->set_row_attribs($attrib, $i);
	}

	return $args;
	}

	/**
	* Handler for folder info/edit form (folder_form hook).
	* Adds folder type selector.
	*/
	function folder_form($args)
	{
	if (!$this->metadata_support()) {
	return $args;
	}
	// load translations
	$this->add_texts('localization/', false);

	// INBOX folder is of type mail.inbox and this cannot be changed
	if ($args['name'] == 'INBOX') {
	$args['form']['props']['fieldsets']['settings']['content']['foldertype'] = array(
	'label' => $this->gettext('folderctype'),
	'value' => sprintf('%s (%s)', $this->gettext('foldertypemail'), $this->gettext('inbox')),
	);

	return $args;
	}

	if ($args['options']['is_root']) {
	return $args;
	}

	$mbox = strlen($args['name']) ? $args['name'] : $args['parent_name'];

	if (isset($_POST['_ctype'])) {
	$new_ctype = trim(get_input_value('_ctype', RCUBE_INPUT_POST));
	$new_subtype = trim(get_input_value('_subtype', RCUBE_INPUT_POST));
	}

	// Get type of the folder or the parent
	if (strlen($mbox)) {
	list($ctype, $subtype) = $this->get_folder_type($mbox);
	if (strlen($args['parent_name']) && $subtype == 'default')
	$subtype = ''; // there can be only one
	}

	if (!$ctype) {
	$ctype = 'mail';
	}

	$storage = $this->rc->get_storage();

	// Don't allow changing type of shared folder, according to ACL
	if (strlen($mbox)) {
	$options = $storage->folder_info($mbox);
	if ($options['namespace'] != 'personal' && !in_array('a', $options['rights'])) {
	if (in_array($ctype, $this->types)) {
	$value = $this->gettext('foldertype'.$ctype);
	}
	else {
	$value = $ctype;
	}
	if ($subtype) {
	$value .= ' ('. ($subtype == 'default' ? $this->gettext('default') : $subtype) .')';
	}

	$args['form']['props']['fieldsets']['settings']['content']['foldertype'] = array(
	'label' => $this->gettext('folderctype'),
	'value' => $value,
	);

	return $args;
	}
	}

	// Add javascript script to the client
	$this->include_script('kolab_folders.js');

	// build type SELECT fields
	$type_select = new html_select(array('name' => '_ctype', 'id' => '_ctype'));
	$sub_select = new html_select(array('name' => '_subtype', 'id' => '_subtype'));

	foreach ($this->types as $type) {
	$type_select->add($this->gettext('foldertype'.$type), $type);
	}
	// add non-supported type
	if (!in_array($ctype, $this->types)) {
	$type_select->add($ctype, $ctype);
	}

	$sub_select->add('', '');
	$sub_select->add($this->gettext('default'), 'default');
	foreach ($this->mail_types as $type) {
	$sub_select->add($this->gettext($type), $type);
	}

	$args['form']['props']['fieldsets']['settings']['content']['foldertype'] = array(
	'label' => $this->gettext('folderctype'),
	'value' => $type_select->show(isset($new_ctype) ? $new_ctype : $ctype)
	. $sub_select->show(isset($new_subtype) ? $new_subtype : $subtype),
	);

	return $args;
	}

	/**
	* Handler for folder update/create action (folder_update/folder_create hook).
	*/
	function folder_save($args)
	{
	// Folder actions from folders list
	if (empty($args['record'])) {
	return $args;
	}

	// Folder create/update with form
	$ctype = trim(get_input_value('_ctype', RCUBE_INPUT_POST));
	$subtype = trim(get_input_value('_subtype', RCUBE_INPUT_POST));
	$mbox = $args['record']['name'];
	$old_mbox = $args['record']['oldname'];
	$subscribe = $args['record']['subscribe'];

	if (empty($ctype)) {
	return $args;
	}

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

	// Skip folder creation/rename in core
	// @TODO: Maybe we should provide folder_create_after and folder_update_after hooks?
	// Using create_mailbox/rename_mailbox here looks bad
	$args['abort'] = true;

	// There can be only one default folder of specified type
	if ($subtype == 'default') {
	$default = $this->get_default_folder($ctype);

	if ($default !== null && $old_mbox != $default) {
	$args['result'] = false;
	$args['message'] = $this->gettext('defaultfolderexists');
	return $args;
	}
	}
	// Subtype sanity-checks
	else if ($subtype && ($ctype != 'mail' \|\| !in_array($subtype, $this->mail_types))) {
	$subtype = '';
	}

	$ctype .= $subtype ? '.'.$subtype : '';

	$storage = $this->rc->get_storage();

	// Create folder
	if (!strlen($old_mbox)) {
	// By default don't subscribe to non-mail folders
	if ($subscribe)
	$subscribe = (bool) preg_match('/^mail/', $ctype);

	$result = $storage->create_folder($mbox, $subscribe);
	// Set folder type
	if ($result) {
	$this->set_folder_type($mbox, $ctype);
	}
	}
	// Rename folder
	else {
	if ($old_mbox != $mbox) {
	$result = $storage->rename_folder($old_mbox, $mbox);
	}
	else {
	$result = true;
	}

	if ($result) {
	list($oldtype, $oldsubtype) = $this->get_folder_type($mbox);
	$oldtype .= $oldsubtype ? '.'.$oldsubtype : '';

	if ($ctype != $oldtype) {
	$this->set_folder_type($mbox, $ctype);
	}
	}
	}

	$args['record']['class'] = self::folder_class_name($ctype);
	$args['record']['subscribe'] = $subscribe;
	$args['result'] = $result;

	return $args;
	}

	/**
	* Checks if IMAP server supports any of METADATA, ANNOTATEMORE, ANNOTATEMORE2
	*
	* @return boolean
	*/
	function metadata_support()
	{
	$storage = $this->rc->get_storage();

	return $storage->get_capability('METADATA') \|\|
	$storage->get_capability('ANNOTATEMORE') \|\|
	$storage->get_capability('ANNOTATEMORE2');
	}

	/**
	* Checks if IMAP server supports any of METADATA, ANNOTATEMORE, ANNOTATEMORE2
	*
	* @param string $folder Folder name
	*
	* @return array Folder content-type
	*/
	function get_folder_type($folder)
	{
	- $storage = $this->rc->get_storage();
	- $folderdata = $storage->get_metadata($folder, array(kolab_storage::CTYPE_KEY_PRIVATE, kolab_storage::CTYPE_KEY));
	-
	- if (!($ctype = $folderdata[$folder][kolab_storage::CTYPE_KEY_PRIVATE])) {
	- $ctype = $folderdata[$folder][kolab_storage::CTYPE_KEY];
	- }
	-
	- return explode('.', $ctype);
	+ return explode('.', (string)kolab_storage::folder_type($folder));
	}

	/**
	* Sets folder content-type.
	*
	* @param string $folder Folder name
	* @param string $type Content type
	*
	* @return boolean True on success
	*/
	function set_folder_type($folder, $type='mail')
	{
	return kolab_storage::set_folder_type($folder, $type);
	}

	/**
	* Returns the name of default folder
	*
	* @param string $type Folder type
	*
	* @return string Folder name
	*/
	function get_default_folder($type)
	{
	$storage = $this->rc->get_storage();
	$folderdata = $storage->get_metadata('*', array(kolab_storage::CTYPE_KEY_PRIVATE, kolab_storage::CTYPE_KEY));

	if (!is_array($folderdata)) {
	return null;
	}

	$type .= '.default';
	$namespace = $storage->get_namespace();

	// get all folders of specified type
	- $folderdata = array_map(array($this, 'folder_select_metadata'), $folderdata);
	+ $folderdata = array_map(array('kolab_storage', 'folder_select_metadata'), $folderdata);
	$folderdata = array_intersect($folderdata, array($type));

	foreach ($folderdata as $folder => $data) {
	// check if folder is in personal namespace
	foreach (array('shared', 'other') as $nskey) {
	if (!empty($namespace[$nskey])) {
	foreach ($namespace[$nskey] as $ns) {
	if ($ns[0] && substr($folder, 0, strlen($ns[0])) == $ns[0]) {
	continue 3;
	}
	}
	}
	}

	// There can be only one default folder of specified type
	return $folder;
	}

	return null;
	}

	- /**
	- * Callback for array_map to select the correct annotation value
	- */
	- private function folder_select_metadata($types)
	- {
	- return $types[kolab_storage::CTYPE_KEY_PRIVATE] ?: $types[kolab_storage::CTYPE_KEY];
	- }
	-
	/**
	* Returns CSS class name for specified folder type
	*
	* @param string $type Folder type
	*
	* @return string Class name
	*/
	static function folder_class_name($type)
	{
	list($ctype, $subtype) = explode('.', $type);

	$class[] = 'type-' . ($ctype ? $ctype : 'mail');

	if ($subtype)
	$class[] = 'subtype-' . $subtype;

	return implode(' ', $class);
	}

	/**
	* Creates default folders if they doesn't exist
	*/
	private function create_default_folders(&$folders, $filter, $folderdata = null)
	{
	$storage = $this->rc->get_storage();
	$namespace = $storage->get_namespace();
	$defaults = array();
	$need_update = false;

	if (!is_array($folderdata)) {
	$folderdata = $storage->get_metadata('*', kolab_storage::CTYPE_KEY);

	if (!is_array($folderdata)) {
	return;
	}

	// "Flattenize" metadata array to become a name->type hash
	$folderdata = array_map('implode', $folderdata);
	}

	// Find personal namespace prefix
	if (is_array($namespace['personal']) && count($namespace['personal']) == 1) {
	$prefix = $namespace['personal'][0][0];
	}
	else {
	$prefix = '';
	}

	$this->load_config();

	// get configured defaults
	foreach ($this->types as $type) {
	$subtypes = $type == 'mail' ? $this->mail_types : array('default');
	foreach ($subtypes as $subtype) {
	$opt_name = 'kolab_folders_' . $type . '_' . $subtype;
	if ($folder = $this->rc->config->get($opt_name)) {
	// convert configuration value to UTF7-IMAP charset
	$folder = rcube_charset::convert($folder, RCMAIL_CHARSET, 'UTF7-IMAP');
	// and namespace prefix if needed
	if ($prefix && strpos($folder, $prefix) === false && $folder != 'INBOX') {
	$folder = $prefix . $folder;
	}
	$defaults[$type . '.' . $subtype] = $folder;
	}
	}
	}

	// find default folders
	foreach ($defaults as $type => $foldername) {
	// folder exists, do nothing
	if (!empty($folderdata[$foldername])) {
	continue;
	}

	// special case, need to set type only
	if ($foldername == 'INBOX' \|\| $type == 'mail.inbox') {
	$this->set_folder_type($foldername, 'mail.inbox');
	continue;
	}

	// get all folders of specified type
	$folders = array_intersect($folderdata, array($type));
	unset($folders[0]);

	// find folders in personal namespace
	foreach ($folders as $folder) {
	if ($folder) {
	foreach (array('shared', 'other') as $nskey) {
	if (!empty($namespace[$nskey])) {
	foreach ($namespace[$nskey] as $ns) {
	if ($ns[0] && substr($folder, 0, strlen($ns[0])) == $ns[0]) {
	continue 3;
	}
	}
	}
	}
	}

	// got folder in personal namespace
	continue 2;
	}

	list($type1, $type2) = explode('.', $type);

	// create folder
	if ($type1 != 'mail' \|\| !$storage->folder_exists($foldername)) {
	$storage->create_folder($foldername, $type1 == 'mail');
	}

	// set type
	$result = $this->set_folder_type($foldername, $type);

	// add new folder to the result
	if ($result && (!$filter \|\| $filter == $type1)) {
	$folders[] = $foldername;
	}
	}
	}


	/**
	* Static getter for default folder of the given type
	*
	* @param string $type Folder type
	* @return string Folder name
	*/
	public static function default_folder($type)
	{
	return self::$instance->get_default_folder($type);
	}
	}
	diff --git a/plugins/libkolab/lib/kolab_storage.php b/plugins/libkolab/lib/kolab_storage.php
	index 57e54910..b29b4169 100644
	--- a/plugins/libkolab/lib/kolab_storage.php
	+++ b/plugins/libkolab/lib/kolab_storage.php
	@@ -1,645 +1,652 @@
	<?php

	/**
	* Kolab storage class providing static methods to access groupware objects on a 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
	{
	const CTYPE_KEY = '/shared/vendor/kolab/folder-type';
	const CTYPE_KEY_PRIVATE = '/private/vendor/kolab/folder-type';
	const COLOR_KEY_SHARED = '/shared/vendor/kolab/color';
	const COLOR_KEY_PRIVATE = '/private/vendor/kolab/color';
	const SERVERSIDE_SUBSCRIPTION = 0;
	const CLIENTSIDE_SUBSCRIPTION = 1;

	public static $last_error;

	private static $ready = false;
	private static $config;
	private static $cache;
	private static $imap;


	/**
	* Setup the environment needed by the libs
	*/
	public static function setup()
	{
	if (self::$ready)
	return true;

	$rcmail = rcube::get_instance();
	self::$config = $rcmail->config;
	self::$imap = $rcmail->get_storage();
	self::$ready = class_exists('kolabformat') &&
	(self::$imap->get_capability('METADATA') \|\| self::$imap->get_capability('ANNOTATEMORE') \|\| self::$imap->get_capability('ANNOTATEMORE2'));

	if (self::$ready) {
	// set imap options
	self::$imap->set_options(array(
	'skip_deleted' => true,
	'threading' => false,
	));
	self::$imap->set_pagesize(9999);
	}

	return self::$ready;
	}


	/**
	* Get a list of storage folders for the given data type
	*
	* @param string Data type to list folders for (contact,distribution-list,event,task,note)
	*
	* @return array List of Kolab_Folder objects (folder names in UTF7-IMAP)
	*/
	public static function get_folders($type)
	{
	$folders = $folderdata = array();

	if (self::setup()) {
	foreach ((array)self::list_folders('', '*', $type, false, $folderdata) as $foldername) {
	$folders[$foldername] = new kolab_storage_folder($foldername, $folderdata[$foldername]);
	}
	}

	return $folders;
	}


	/**
	* Getter for a specific storage folder
	*
	* @param string IMAP folder to access (UTF7-IMAP)
	* @return object kolab_storage_folder The folder object
	*/
	public static function get_folder($folder)
	{
	return self::setup() ? new kolab_storage_folder($folder) : null;
	}


	/**
	* Getter for a single Kolab object, identified by its UID.
	* This will search all folders storing objects of the given type.
	*
	* @param string Object UID
	* @param string Object type (contact,distribution-list,event,task,note)
	* @return array The Kolab object represented as hash array or false if not found
	*/
	public static function get_object($uid, $type)
	{
	self::setup();
	$folder = null;
	foreach ((array)self::list_folders('', '*', $type) as $foldername) {
	if (!$folder)
	$folder = new kolab_storage_folder($foldername);
	else
	$folder->set_folder($foldername);

	if ($object = $folder->get_object($uid))
	return $object;
	}

	return false;
	}


	/**
	*
	*/
	public static function get_freebusy_server()
	{
	return unslashify(self::$config->get('kolab_freebusy_server', 'https://' . $_SESSION['imap_host'] . '/freebusy'));
	}


	/**
	* Compose an URL to query the free/busy status for the given user
	*/
	public static function get_freebusy_url($email)
	{
	return self::get_freebusy_server() . '/' . $email . '.ifb';
	}


	/**
	* Creates folder ID from folder name
	*
	* @param string $folder Folder name (UTF7-IMAP)
	*
	* @return string Folder ID string
	*/
	public static function folder_id($folder)
	{
	return asciiwords(strtr($folder, '/.-', '___'));
	}


	/**
	* Deletes IMAP folder
	*
	* @param string $name Folder name (UTF7-IMAP)
	*
	* @return bool True on success, false on failure
	*/
	public static function folder_delete($name)
	{
	// clear cached entries first
	if ($folder = self::get_folder($name))
	$folder->cache->purge();

	$success = self::$imap->delete_folder($name);
	self::$last_error = self::$imap->get_error_str();

	return $success;
	}

	/**
	* Creates IMAP folder
	*
	* @param string $name Folder name (UTF7-IMAP)
	* @param string $type Folder type
	* @param bool $subscribed Sets folder subscription
	*
	* @return bool True on success, false on failure
	*/
	public static function folder_create($name, $type = null, $subscribed = false)
	{
	self::setup();

	if ($saved = self::$imap->create_folder($name, $subscribed)) {
	// set metadata for folder type
	if ($type) {
	$saved = self::set_folder_type($name, $type);

	// revert if metadata could not be set
	if (!$saved) {
	self::$imap->delete_folder($name);
	}
	}
	}

	if ($saved) {
	return true;
	}

	self::$last_error = self::$imap->get_error_str();
	return false;
	}

	/**
	* Renames IMAP folder
	*
	* @param string $oldname Old folder name (UTF7-IMAP)
	* @param string $newname New folder name (UTF7-IMAP)
	*
	* @return bool True on success, false on failure
	*/
	public static function folder_rename($oldname, $newname)
	{
	self::setup();

	$success = self::$imap->rename_folder($oldname, $newname);
	self::$last_error = self::$imap->get_error_str();

	return $success;
	}


	/**
	* Rename or Create a new IMAP folder.
	*
	* Does additional checks for permissions and folder name restrictions
	*
	* @param array Hash array with folder properties and metadata
	* - name: Folder name
	* - oldname: Old folder name when changed
	* - parent: Parent folder to create the new one in
	* - type: Folder type to create
	* @return mixed New folder name or False on failure
	*/
	public static function folder_update(&$prop)
	{
	self::setup();

	$folder = rcube_charset::convert($prop['name'], RCMAIL_CHARSET, 'UTF7-IMAP');
	$oldfolder = $prop['oldname']; // UTF7
	$parent = $prop['parent']; // UTF7
	$delimiter = self::$imap->get_hierarchy_delimiter();

	if (strlen($oldfolder)) {
	$options = self::$imap->folder_info($oldfolder);
	}

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

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

	// update the folder name
	if (strlen($oldfolder)) {
	if ($oldfolder != $folder) {
	$result = self::folder_rename($oldfolder, $folder);
	}
	else
	$result = true;
	}
	// create new folder
	else {
	$result = self::folder_create($folder, $prop['type'], $prop['subscribed'] === self::SERVERSIDE_SUBSCRIPTION);
	}

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

	if ($result && $prop['color']) {
	$meta_saved = false;
	$ns = self::$imap->folder_namespace($folder);
	if ($ns == 'personal') // save in shared namespace for personal folders
	$meta_saved = self::$imap->set_metadata($folder, array(self::COLOR_KEY_SHARED => $prop['color']));
	if (!$meta_saved) // try in private namespace
	$meta_saved = self::$imap->set_metadata($folder, array(self::COLOR_KEY_PRIVATE => $prop['color']));
	if ($meta_saved)
	unset($prop['color']); // unsetting will prevent fallback to local user prefs
	}

	return $result ? $folder : false;
	}


	/**
	* Getter for human-readable name of Kolab object (folder)
	* See http://wiki.kolab.org/UI-Concepts/Folder-Listing for reference
	*
	* @param string $folder IMAP folder name (UTF7-IMAP)
	* @param string $folder_ns Will be set to namespace name of the folder
	*
	* @return string Name of the folder-object
	*/
	public static function object_name($folder, &$folder_ns=null)
	{
	self::setup();

	$found = false;
	$namespace = self::$imap->get_namespace();

	if (!empty($namespace['shared'])) {
	foreach ($namespace['shared'] as $ns) {
	if (strlen($ns[0]) && strpos($folder, $ns[0]) === 0) {
	$prefix = '';
	$folder = substr($folder, strlen($ns[0]));
	$delim = $ns[1];
	$found = true;
	$folder_ns = 'shared';
	break;
	}
	}
	}
	if (!$found && !empty($namespace['other'])) {
	foreach ($namespace['other'] as $ns) {
	if (strlen($ns[0]) && strpos($folder, $ns[0]) === 0) {
	// remove namespace prefix
	$folder = substr($folder, strlen($ns[0]));
	$delim = $ns[1];
	// get username
	$pos = strpos($folder, $delim);
	if ($pos) {
	$prefix = '('.substr($folder, 0, $pos).') ';
	$folder = substr($folder, $pos+1);
	}
	else {
	$prefix = '('.$folder.')';
	$folder = '';
	}
	$found = true;
	$folder_ns = 'other';
	break;
	}
	}
	}
	if (!$found && !empty($namespace['personal'])) {
	foreach ($namespace['personal'] as $ns) {
	if (strlen($ns[0]) && strpos($folder, $ns[0]) === 0) {
	// remove namespace prefix
	$folder = substr($folder, strlen($ns[0]));
	$prefix = '';
	$delim = $ns[1];
	$found = true;
	break;
	}
	}
	}

	if (empty($delim))
	$delim = self::$imap->get_hierarchy_delimiter();

	$folder = rcube_charset::convert($folder, 'UTF7-IMAP');
	$folder = html::quote($folder);
	$folder = str_replace(html::quote($delim), ' » ', $folder);

	if ($prefix)
	$folder = html::quote($prefix) . ' ' . $folder;

	if (!$folder_ns)
	$folder_ns = 'personal';

	return $folder;
	}


	/**
	* Helper method to generate a truncated folder name to display
	*/
	public static function folder_displayname($origname, &$names)
	{
	$name = $origname;

	// find folder prefix to truncate
	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;

	return $name;
	}


	/**
	* Creates a SELECT field with folders list
	*
	* @param string $type Folder type
	* @param array $attrs SELECT field attributes (e.g. name)
	* @param string $current The name of current folder (to skip it)
	*
	* @return html_select SELECT object
	*/
	public static function folder_selector($type, $attrs, $current = '')
	{
	// get all folders of specified type
	$folders = self::get_folders($type);

	$delim = self::$imap->get_hierarchy_delimiter();
	$names = array();
	$len = strlen($current);

	if ($len && ($rpos = strrpos($current, $delim))) {
	$parent = substr($current, 0, $rpos);
	$p_len = strlen($parent);
	}

	// Filter folders list
	foreach ($folders as $c_folder) {
	$name = $c_folder->name;
	// skip current folder and it's subfolders
	if ($len && ($name == $current \|\| strpos($name, $current.$delim) === 0)) {
	continue;
	}

	// always show the parent of current folder
	if ($p_len && $name == $parent) { }
	// skip folders where user have no rights to create subfolders
	else if ($c_folder->get_owner() != $_SESSION['username']) {
	$rights = $c_folder->get_myrights();
	if (!preg_match('/[ck]/', $rights)) {
	continue;
	}
	}

	$names[$name] = rcube_charset::convert($name, 'UTF7-IMAP');
	}

	// Make sure parent folder is listed (might be skipped e.g. if it's namespace root)
	if ($p_len && !isset($names[$parent])) {
	$names[$parent] = rcube_charset::convert($parent, 'UTF7-IMAP');
	}

	// Sort folders list
	asort($names, SORT_LOCALE_STRING);

	$folders = array_keys($names);
	$names = array();

	// Build SELECT field of parent folder
	$attrs['is_escaped'] = true;
	$select = new html_select($attrs);
	$select->add('---', '');

	foreach ($folders as $name) {
	$imap_name = $name;
	$name = $origname = self::object_name($name);

	// find folder prefix to truncate
	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;
	$select->add($name, $imap_name);
	}

	return $select;
	}


	/**
	* Returns a list of folder names
	*
	* @param string Optional root folder
	* @param string Optional name pattern
	* @param string Data type to list folders for (contact,distribution-list,event,task,note,mail)
	* @param string Enable to return subscribed folders only
	* @param array Will be filled with folder-types data
	*
	* @return array List of folders
	*/
	public static function list_folders($root = '', $mbox = '*', $filter = null, $subscribed = false, &$folderdata = array())
	{
	if (!self::setup()) {
	return null;
	}

	if (!$filter) {
	// Get ALL folders list, standard way
	if ($subscribed) {
	return self::$imap->list_folders_subscribed($root, $mbox);
	}
	else {
	return self::$imap->list_folders($root, $mbox);
	}
	}

	$prefix = $root . $mbox;

	// get folders types
	$folderdata = self::$imap->get_metadata($prefix, array(self::CTYPE_KEY, self::CTYPE_KEY_PRIVATE));

	if (!is_array($folderdata)) {
	return array();
	}

	$folderdata = array_map(array('kolab_storage', 'folder_select_metadata'), $folderdata);
	$regexp = '/^' . preg_quote($filter, '/') . '(\..+)?$/';

	// In some conditions we can skip LIST command (?)
	if ($subscribed == false && $filter != 'mail' && $prefix == '*') {
	foreach ($folderdata as $folder => $type) {
	if (!preg_match($regexp, $type)) {
	unset($folderdata[$folder]);
	}
	}
	return array_keys($folderdata);
	}

	// Get folders list
	if ($subscribed) {
	$folders = self::$imap->list_folders_subscribed($root, $mbox);
	}
	else {
	$folders = self::$imap->list_folders($root, $mbox);
	}

	// In case of an error, return empty list (?)
	if (!is_array($folders)) {
	return array();
	}

	// Filter folders list
	foreach ($folders as $idx => $folder) {
	$type = $folderdata[$folder];

	if ($filter == 'mail' && empty($type)) {
	continue;
	}
	if (empty($type) \|\| !preg_match($regexp, $type)) {
	unset($folders[$idx]);
	}
	}

	return $folders;
	}


	/**
	* Callback for array_map to select the correct annotation value
	*/
	static function folder_select_metadata($types)
	{
	- return $types[self::CTYPE_KEY_PRIVATE] ?: $types[self::CTYPE_KEY];
	+ if (!empty($types[self::CTYPE_KEY_PRIVATE])) {
	+ return $types[self::CTYPE_KEY_PRIVATE];
	+ }
	+ else if (!empty($types[self::CTYPE_KEY])) {
	+ list($ctype, $suffix) = explode('.', $types[self::CTYPE_KEY]);
	+ return $ctype;
	+ }
	+ return null;
	}


	/**
	* Returns type of IMAP folder
	*
	* @param string $folder Folder name (UTF7-IMAP)
	*
	* @return string Folder type
	*/
	static function folder_type($folder)
	{
	self::setup();

	$metadata = self::$imap->get_metadata($folder, array(self::CTYPE_KEY, self::CTYPE_KEY_PRIVATE));

	if (!is_array($metadata)) {
	return null;
	}

	if (!empty($metadata[$folder])) {
	return self::folder_select_metadata($metadata[$folder]);
	}

	return 'mail';
	}

	/**
	* Sets folder content-type.
	*
	* @param string $folder Folder name
	* @param string $type Content type
	*
	* @return boolean True on success
	*/
	static function set_folder_type($folder, $type='mail')
	{
	list($ctype, $subtype) = explode('.', $type);

	$success = self::$imap->set_metadata($folder, array(self::CTYPE_KEY => $ctype, self::CTYPE_KEY_PRIVATE => $subtype ? $type : null));

	if (!$success) // fallback: only set private annotation
	$success \|= self::$imap->set_metadata($folder, array(self::CTYPE_KEY_PRIVATE => $type));

	return $success;
	}
	}

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