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	diff --git a/plugins/kolab_folders/kolab_folders.php b/plugins/kolab_folders/kolab_folders.php
	index 29bcd2f9..3e010611 100644
	--- a/plugins/kolab_folders/kolab_folders.php
	+++ b/plugins/kolab_folders/kolab_folders.php
	@@ -1,668 +1,517 @@
	<?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;

	- const CTYPE_KEY = '/shared/vendor/kolab/folder-type';
	-

	/**
	* Plugin initialization.
	*/
	function init()
	{
	$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($args)
	{
	- if (!$this->metadata_support()) {
	+ // infinite loop prevention
	+ if ($this->is_processing) {
	return $args;
	}

	- $filter = $args['filter'];
	-
	- // all-folders request, use core method
	- if (!$filter) {
	+ if (!$this->metadata_support()) {
	return $args;
	}

	- // get folders types
	- $folderdata = $this->get_folder_type_list($args['root'].$args['name'], true);
	+ $this->is_processing = true;

	- if (!is_array($folderdata)) {
	- return $args;
	- }
	+ // get folders
	+ $folders = kolab_storage::list_folders($args['root'], $args['name'], $args['filter'], $args['mode'] == 'LSUB');

	- $regexp = '/^' . preg_quote($filter, '/') . '(\..+)?$/';
	+ $this->is_processing = false;

	- // In some conditions we can skip LIST command (?)
	- if ($args['mode'] == 'LIST' && $filter != 'mail'
	- && $args['root'] == '' && $args['name'] == '*'
	- ) {
	- foreach ($folderdata as $folder => $type) {
	- if (!preg_match($regexp, $type)) {
	- unset($folderdata[$folder]);
	- }
	- }
	- $args['folders'] = array_keys($folderdata);
	+ if (!is_array($folders)) {
	return $args;
	}

	- $storage = $this->rc->get_storage();
	-
	- // Get folders list
	- if ($args['mode'] == 'LIST') {
	- if (!$storage->check_connection()) {
	- return $args;
	- }
	- $args['folders'] = $storage->conn->listMailboxes($args['root'], $args['name']);
	- }
	- else {
	- $args['folders'] = $this->list_subscribed($args['root'], $args['name']);
	+ // Create default folders
	+ if ($args['root'] == '' && $args['name'] = '*') {
	+ $this->create_default_folders($folders, $args['filter']);
	}

	- // In case of an error, return empty list
	- if (!is_array($args['folders'])) {
	- $args['folders'] = array();
	- return $args;
	- }
	-
	- // Filter folders list
	- foreach ($args['folders'] as $idx => $folder) {
	- $type = $folderdata[$folder];
	- if ($filter == 'mail' && empty($type)) {
	- continue;
	- }
	- if (empty($type) \|\| !preg_match($regexp, $type)) {
	- unset($args['folders'][$idx]);
	- }
	- }
	+ $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'];
	+ $table = $args['table'];
	+ $storage = $this->rc->get_storage();

	// get folders types
	- $folderdata = $this->get_folder_type_list('*');
	+ $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 = $folderdata[$folder];
	+ $type = !empty($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'])) {
	- // Just clear Horde folders cache and return
	- $this->clear_folders_cache();
	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);
	}
	}
	}

	- // Clear Horde folders cache
	- if ($result) {
	- $this->clear_folders_cache();
	- }
	-
	$args['record']['class'] = self::folder_class_name($ctype);
	$args['record']['subscribe'] = $subscribe;
	$args['result'] = $result;

	return $args;
	}

	/**
	* Checks if IMAP server supports any of METADATA, ANNOTATEMORE, ANNOTATEMORE2
	*
	- * @return boolean
	+ * @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_folders::CTYPE_KEY));
	+ $folderdata = $storage->get_metadata($folder, kolab_storage::CTYPE_KEY);

	- return explode('.', $folderdata[$folder][kolab_folders::CTYPE_KEY]);
	+ return explode('.', $folderdata[$folder][kolab_storage::CTYPE_KEY]);
	}

	/**
	* 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')
	{
	$storage = $this->rc->get_storage();

	- return $storage->set_metadata($folder, array(kolab_folders::CTYPE_KEY => $type));
	- }
	-
	- /**
	- * Returns list of subscribed folders (directly from IMAP server)
	- *
	- * @param string $root Optional root folder
	- * @param string $name Optional name pattern
	- *
	- * @return array List of mailboxes/folders
	- */
	- private function list_subscribed($root='', $name='*')
	- {
	- $storage = $this->rc->get_storage();
	-
	- if (!$storage->check_connection()) {
	- return null;
	- }
	-
	- // Code copied from rcube_imap::_list_mailboxes()
	- // Server supports LIST-EXTENDED, we can use selection options
	- // #1486225: Some dovecot versions returns wrong result using LIST-EXTENDED
	- if (!$this->rc->config->get('imap_force_lsub') && $storage->get_capability('LIST-EXTENDED')) {
	- // This will also set mailbox options, LSUB doesn't do that
	- $a_folders = $storage->conn->listMailboxes($root, $name,
	- NULL, array('SUBSCRIBED'));
	-
	- // remove non-existent folders
	- if (is_array($a_folders) && $name = '*' && !empty($storage->conn->data['LIST'])) {
	- foreach ($a_folders as $idx => $folder) {
	- if (($opts = $storage->conn->data['LIST'][$folder])
	- && in_array('\\NonExistent', $opts)
	- ) {
	- $storage->conn->unsubscribe($folder);
	- unset($a_folders[$idx]);
	- }
	- }
	- }
	- }
	- // retrieve list of folders from IMAP server using LSUB
	- else {
	- $a_folders = $storage->conn->listSubscribed($root, $name);
	-
	- // unsubscribe non-existent folders, remove from the list
	- if (is_array($a_folders) && $name == '*' && !empty($storage->conn->data['LIST'])) {
	- foreach ($a_folders as $idx => $folder) {
	- if (!isset($storage->conn->data['LIST'][$folder])
	- \|\| in_array('\\Noselect', $storage->conn->data['LIST'][$folder])
	- ) {
	- // Some servers returns \Noselect for existing folders
	- if (!$storage->folder_exists($folder)) {
	- $storage->conn->unsubscribe($folder);
	- unset($a_folders[$idx]);
	- }
	- }
	- }
	- }
	- }
	-
	- return $a_folders;
	- }
	-
	- /**
	- * Returns list of folder(s) type(s)
	- *
	- * @param string $mbox Folder name or pattern
	- * @param bool $defaults Enables creation of configured default folders
	- *
	- * @return array List of folders data, indexed by folder name
	- */
	- function get_folder_type_list($mbox, $create_defaults = false)
	- {
	- $storage = $this->rc->get_storage();
	-
	- // Use mailboxes. prefix so the cache will be cleared by core
	- // together with other mailboxes-related cache data
	- $cache_key = 'mailboxes.folder-type.'.$mbox;
	-
	- // get cached metadata
	- $metadata = $storage->get_cache($cache_key);
	-
	- if (!is_array($metadata)) {
	- $metadata = $storage->get_metadata($mbox, kolab_folders::CTYPE_KEY);
	- $need_update = true;
	- }
	-
	- if (!is_array($metadata)) {
	- return false;
	- }
	-
	- // make the result more flat
	- if ($need_update) {
	- $metadata = array_map('implode', $metadata);
	- }
	-
	- // create default folders if needed
	- if ($create_defaults) {
	- $this->create_default_folders($metadata, $cache_key);
	- }
	-
	- // write mailboxlist to cache
	- if ($need_update) {
	- $storage->update_cache($cache_key, $metadata);
	- }
	-
	- return $metadata;
	+ return $storage->set_metadata($folder, array(kolab_storage::CTYPE_KEY => $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 = $this->get_folder_type_list('*');
	+ $folderdata = $storage->get_metadata('*', kolab_storage::CTYPE_KEY);

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

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

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

	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;
	}

	/**
	* 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);
	}

	- /**
	- * Clear Horde's folder cache. See Kolab_List::singleton().
	- */
	- private function clear_folders_cache()
	- {
	- unset($_SESSION['horde_session_objects']['kolab_folderlist']);
	- }
	-
	/**
	* Creates default folders if they doesn't exist
	*/
	- private function create_default_folders(&$folderdata, $cache_key = null)
	+ private function create_default_folders(&$folders, $filter)
	{
	$storage = $this->rc->get_storage();
	$namespace = $storage->get_namespace();
	+ $folderdata = $storage->get_metadata('*', kolab_storage::CTYPE_KEY);
	$defaults = array();
	$need_update = false;

	+ 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));
	+ $folders = array_intersect($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) {
	- $folderdata[$foldername] = $type;
	- $need_update = true;
	+ if ($result && (!$filter \|\| $filter == $type1)) {
	+ $folders[] = $foldername;
	}
	}
	-
	- // update cache
	- if ($need_update && $cache_key) {
	- $storage->update_cache($cache_key, $folderdata);
	- }
	}

	}
	diff --git a/plugins/kolab_folders/package.xml b/plugins/kolab_folders/package.xml
	index 8042ba25..875d6140 100644
	--- a/plugins/kolab_folders/package.xml
	+++ b/plugins/kolab_folders/package.xml
	@@ -1,63 +1,63 @@
	<?xml version="1.0" encoding="UTF-8"?>
	<package xmlns="http://pear.php.net/dtd/package-2.0" xmlns:tasks="http://pear.php.net/dtd/tasks-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" packagerversion="1.9.0" version="2.0" xsi:schemaLocation="http://pear.php.net/dtd/tasks-1.0
	http://pear.php.net/dtd/tasks-1.0.xsd
	http://pear.php.net/dtd/package-2.0
	http://pear.php.net/dtd/package-2.0.xsd">
	<name>kolab_folders</name>
	<uri>http://git.kolab.org/roundcubemail-plugins-kolab/</uri>
	<summary>Type-aware folder management/listing for Kolab</summary>
	<description>
	The plugin extends folders handling with features of the Kolab Suite
	according to specified format (http://www.kolab.org/doc/kolabformat-2.0-html).
	With this plugin enabled it is possible to:
	- set/get/change folder's type,
	- filter folders list by folder type,
	- style folders list rows (in folder manager),
	- create default folders with specified type.
	</description>
	<lead>
	<name>Aleksander Machniak</name>
	<user>machniak</user>
	<email>machniak@kolabsys.com</email>
	<active>yes</active>
	</lead>
	- <date>2011-11-01</date>
	+ <date>2012-05-14</date>
	<version>
	- <release>1.0</release>
	- <api>1.0</api>
	+ <release>2.0</release>
	+ <api>2.0</api>
	</version>
	<stability>
	<release>stable</release>
	<api>stable</api>
	</stability>
	<license uri="http://www.gnu.org/licenses/agpl.html">GNU AGPLv3</license>
	<notes>-</notes>
	<contents>
	<dir baseinstalldir="/" name="/">
	<file name="kolab_folders.php" role="php">
	<tasks:replace from="@name@" to="name" type="package-info"/>
	<tasks:replace from="@package_version@" to="version" type="package-info"/>
	</file>
	<file name="kolab_folders.js" role="data">
	<tasks:replace from="@name@" to="name" type="package-info"/>
	<tasks:replace from="@package_version@" to="version" type="package-info"/>
	</file>
	<file name="config.inc.php.dist" role="data"></file>
	<file name="localization/en_US.inc" role="data"></file>
	<file name="localization/pl_PL.inc" role="data"></file>
	<file name="LICENSE" role="data"></file>
	</dir>
	<!-- / -->
	</contents>
	<dependencies>
	<required>
	<php>
	<min>5.2.1</min>
	</php>
	<pearinstaller>
	<min>1.7.0</min>
	</pearinstaller>
	</required>
	</dependencies>
	<phprelease />
	</package>
	diff --git a/plugins/libkolab/lib/kolab_storage.php b/plugins/libkolab/lib/kolab_storage.php
	index 175bb027..43f9c720 100644
	--- a/plugins/libkolab/lib/kolab_storage.php
	+++ b/plugins/libkolab/lib/kolab_storage.php
	@@ -1,378 +1,456 @@
	<?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 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 = array();

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

	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, self::$imap) : 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();
	$folder = null;
	- foreach ((array)self::$imap->list_folders('', '*', $type) as $foldername) {
	+ foreach ((array)self::list_folders('', '*', $type) as $foldername) {
	if (!$folder)
	$folder = new kolab_storage_folder($foldername, self::$imap);
	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)
	{
	self::setup();

	$success = self::$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 $default True if older is default (for specified type)
	*
	* @return bool True on success, false on failure
	*/
	public static function folder_create($name, $type=null, $default=false)
	{
	self::setup();

	if (self::$imap->create_folder($name)) {
	// set metadata for folder type
	$ctype = $type . ($default ? '.default' : '');
	$saved = self::$imap->set_metadata($name, array(self::CTYPE_KEY => $ctype));

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

	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;
	}


	/**
	* 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');
	$folder = str_replace($delim, ' » ', $folder);

	if ($prefix)
	$folder = $prefix . ' ' . $folder;

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

	return $folder;
	}

	/**
	* 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
	$select = new html_select($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 $select;
	}
	+
	+
	+ /**
	+ * Returns a list of folder names
	+ *
	+ * @param string Optional root folder
	+ * @param string Optional name pattern
	+ * @param string Data type to list folders for (contact,distribution-list,event,task,note,mail)
	+ * @param string Enable to return subscribed folders only
	+ *
	+ * @return array List of folders
	+ */
	+ public static function list_folders($root = '', $mbox = '*', $filter = null, $subscribed = false)
	+ {
	+ if (!self::setup()) {
	+ return null;
	+ }
	+
	+ if (!$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($prefix, self::CTYPE_KEY);
	+
	+ if (!is_array($folderdata)) {
	+ return array();
	+ }
	+
	+ $regexp = '/^' . preg_quote($filter, '/') . '(\..+)?$/';
	+
	+ // In some conditions we can skip LIST command (?)
	+ if ($subscribed == false && $filter != 'mail' && $prefix == '*') {
	+ foreach ($folderdata as $idx => $folder) {
	+ $type = $folder[self::CTYPE_KEY];
	+ if (!preg_match($regexp, $type)) {
	+ unset($folderdata[$idx]);
	+ }
	+ }
	+ return array_keys($folderdata);
	+ }
	+
	+ // Get folders list
	+ if ($subscribed) {
	+ $folders = self::$imap->list_folders_subscribed_direct($root, $mbox);
	+ }
	+ else {
	+ $folders = self::$imap->list_folders_direct($root, $mbox);
	+ }
	+
	+ // In case of an error, return empty list (?)
	+ if (!is_array($folders)) {
	+ return array();
	+ }
	+
	+ // Filter folders list
	+ foreach ($folders as $idx => $folder) {
	+ $type = !empty($folderdata[$folder]) ? $folderdata[$folder][self::CTYPE_KEY] : null;
	+
	+ if ($filter == 'mail' && empty($type)) {
	+ continue;
	+ }
	+ if (empty($type) \|\| !preg_match($regexp, $type)) {
	+ unset($folders[$idx]);
	+ }
	+ }
	+
	+ return $folders;
	+ }
	+
	}

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