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	diff --git a/lib/kolab/kolab_file_storage.php b/lib/kolab/kolab_file_storage.php
	index 4cb9175..4d507ee 100644
	--- a/lib/kolab/kolab_file_storage.php
	+++ b/lib/kolab/kolab_file_storage.php
	@@ -1,771 +1,770 @@
	<?php
	/*
	+--------------------------------------------------------------------------+
	\| This file is part of the Kolab File API \|
	\| \|
	\| Copyright (C) 2012-2013, Kolab Systems AG \|
	\| \|
	\| 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/> \|
	+--------------------------------------------------------------------------+
	\| Author: Aleksander Machniak <machniak@kolabsys.com> \|
	+--------------------------------------------------------------------------+
	*/

	class kolab_file_storage implements file_storage
	{
	/**
	* @var rcube
	*/
	protected $rc;

	/**
	* @var array
	*/
	protected $folders;


	/**
	* Class constructor
	*/
	public function __construct()
	{
	$include_path = RCUBE_INSTALL_PATH . '/lib/kolab' . PATH_SEPARATOR;
	$include_path .= ini_get('include_path');
	set_include_path($include_path);

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

	// Get list of plugins
	// WARNING: We can use only plugins that are prepared for this
	// e.g. are not using output or rcmail objects or
	// doesn't throw errors when using them
	$plugins = (array)$this->rc->config->get('fileapi_plugins', array('kolab_auth', 'kolab_folders'));
	$required = array('libkolab', 'kolab_folders');

	// Initialize/load plugins
	$this->rc->plugins = kolab_file_plugin_api::get_instance();
	$this->rc->plugins->init($this, '');
	$this->rc->plugins->load_plugins($plugins, $required);

	$this->init();
	}

	/**
	* Authenticates a user
	*
	* @param string $username User name
	* @param string $password User password
	*
	* @param bool True on success, False on failure
	*/
	public function authenticate($username, $password)
	{
	$auth = $this->rc->plugins->exec_hook('authenticate', array(
	'host' => $this->select_host($username),
	'user' => $username,
	'pass' => $password,
	'valid' => true,
	));

	// Authenticate - get Roundcube user ID
	if ($auth['valid'] && !$auth['abort']
	&& ($this->login($auth['user'], $auth['pass'], $auth['host']))) {
	return true;
	}

	$this->rc->plugins->exec_hook('login_failed', array(
	'host' => $auth['host'],
	'user' => $auth['user'],
	));
	}

	/**
	* Storage host selection
	*/
	private function select_host($username)
	{
	// Get IMAP host
	$host = $this->rc->config->get('default_host');

	if (is_array($host)) {
	list($user, $domain) = explode('@', $username);

	// try to select host by mail domain
	if (!empty($domain)) {
	foreach ($host as $storage_host => $mail_domains) {
	if (is_array($mail_domains) && in_array_nocase($domain, $mail_domains)) {
	$host = $storage_host;
	break;
	}
	else if (stripos($storage_host, $domain) !== false \|\| stripos(strval($mail_domains), $domain) !== false) {
	$host = is_numeric($storage_host) ? $mail_domains : $storage_host;
	break;
	}
	}
	}

	// take the first entry if $host is not found
	if (is_array($host)) {
	list($key, $val) = each($default_host);
	$host = is_numeric($key) ? $val : $key;
	}
	}

	return rcube_utils::parse_host($host);
	}

	/**
	* Authenticates a user in IMAP
	*/
	private function login($username, $password, $host)
	{
	if (empty($username)) {
	return false;
	}

	$login_lc = $this->rc->config->get('login_lc');
	$default_port = $this->rc->config->get('default_port', 143);

	// parse $host
	$a_host = parse_url($host);
	if ($a_host['host']) {
	$host = $a_host['host'];
	$ssl = (isset($a_host['scheme']) && in_array($a_host['scheme'], array('ssl','imaps','tls'))) ? $a_host['scheme'] : null;
	if (!empty($a_host['port'])) {
	$port = $a_host['port'];
	}
	else if ($ssl && $ssl != 'tls' && (!$default_port \|\| $default_port == 143)) {
	$port = 993;
	}
	}

	if (!$port) {
	$port = $default_port;
	}

	// Convert username to lowercase. If storage backend
	// is case-insensitive we need to store always the same username
	if ($login_lc) {
	if ($login_lc == 2 \|\| $login_lc === true) {
	$username = mb_strtolower($username);
	}
	else if (strpos($username, '@')) {
	// lowercase domain name
	list($local, $domain) = explode('@', $username);
	$username = $local . '@' . mb_strtolower($domain);
	}
	}

	// Here we need IDNA ASCII
	// Only rcube_contacts class is using domain names in Unicode
	$host = rcube_utils::idn_to_ascii($host);
	$username = rcube_utils::idn_to_ascii($username);

	// user already registered?
	if ($user = rcube_user::query($username, $host)) {
	$username = $user->data['username'];
	}

	// authenticate user in IMAP
	$storage = $this->rc->get_storage();
	if (!$storage->connect($host, $username, $password, $port, $ssl)) {
	return false;
	}

	// No user in database, but IMAP auth works
	if (!is_object($user)) {
	if ($this->rc->config->get('auto_create_user')) {
	// create a new user record
	$user = rcube_user::create($username, $host);

	if (!$user) {
	rcube::raise_error(array(
	'code' => 620, 'type' => 'php', 'file' => __FILE__, 'line' => __LINE__,
	'message' => "Failed to create a user record",
	), true, false);
	return false;
	}
	}
	else {
	rcube::raise_error(array(
	'code' => 620, 'type' => 'php', 'file' => __FILE__, 'line' => __LINE__,
	'message' => "Access denied for new user $username. 'auto_create_user' is disabled",
	), true, false);
	return false;
	}
	}
	// set session vars
	$_SESSION['user_id'] = $user->ID;
	$_SESSION['username'] = $user->data['username'];
	$_SESSION['storage_host'] = $host;
	$_SESSION['storage_port'] = $port;
	$_SESSION['storage_ssl'] = $ssl;
	$_SESSION['password'] = $this->rc->encrypt($password);

	$this->init($user);

	// force reloading of mailboxes list/data
	$storage->clear_cache('mailboxes', true);

	return true;
	}

	protected function init($user = null)
	{
	if ($_SESSION['user_id'] \|\| $user) {
	// overwrite config with user preferences
	$this->rc->user = $user ? $user : new rcube_user($_SESSION['user_id']);
	$this->rc->config->set_user_prefs((array)$this->rc->user->get_prefs());

	$storage = $this->rc->get_storage();
	$storage->set_charset($this->rc->config->get('default_charset', RCUBE_CHARSET));

	setlocale(LC_ALL, 'en_US.utf8', 'en_US.UTF-8');
	}
	}

	/**
	* Storage driver capabilities
	*
	* @return array List of capabilities
	*/
	public function capabilities()
	{
	// find max filesize value
	$max_filesize = parse_bytes(ini_get('upload_max_filesize'));
	$max_postsize = parse_bytes(ini_get('post_max_size'));
	if ($max_postsize && $max_postsize < $max_filesize) {
	$max_filesize = $max_postsize;
	}

	return array(
	file_storage::CAPS_MAX_UPLOAD => $max_filesize,
	);
	}

	/**
	* Create a file.
	*
	* @param string $file_name Name of a file (with folder path)
	* @param array $file File data (path, type)
	*
	* @throws Exception
	*/
	public function file_create($file_name, $file)
	{
	$exists = $this->get_file_object($file_name, $folder);
	if (!empty($exists)) {
	throw new Exception("Storage error. File exists.", file_api::ERROR_CODE);
	}

	$object = $this->to_file_object(array(
	'name' => $file_name,
	'type' => $file['type'],
	'path' => $file['path'],
	));

	// save the file object in IMAP
	$saved = $folder->save($object, 'file');
	if (!$saved) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error saving object to Kolab server"),
	true, false);

	throw new Exception("Storage error. Saving object failed.", file_api::ERROR_CODE);
	}
	}

	/**
	* Delete a file.
	*
	* @param string $file_name Name of a file (with folder path)
	*
	* @throws Exception
	*/
	public function file_delete($file_name)
	{
	$file = $this->get_file_object($file_name, $folder);
	if (empty($file)) {
	throw new Exception("Storage error. File not found.", file_api::ERROR_CODE);
	}

	$deleted = $folder->delete($file);
	if (!$deleted) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error deleting object from Kolab server"),
	true, false);

	throw new Exception("Storage error. Deleting object failed.", file_api::ERROR_CODE);
	}
	}

	/**
	* Return file body.
	*
	* @param string $file_name Name of a file (with folder path)
	* @param array $params Parameters (force-download)
	*
	* @throws Exception
	*/
	public function file_get($file_name, $params = array())
	{
	$file = $this->get_file_object($file_name, $folder);
	if (empty($file)) {
	throw new Exception("Storage error. File not found.", file_api::ERROR_CODE);
	}

	$file = $this->from_file_object($file);

	if (!empty($params['force-download'])) {
	$disposition = 'attachment';
	header("Content-Type: application/octet-stream");
	// @TODO
	// if ($browser->ie)
	// header("Content-Type: application/force-download");
	}
	else {
	$mimetype = $params['force-type'] ? $params['force-type'] : $file['type'];
	$disposition = 'inline';

	header("Content-Transfer-Encoding: binary");
	header("Content-Type: $mimetype");
	}

	$filename = addcslashes($file['name'], '"');

	// Workaround for nasty IE bug (#1488844)
	// If Content-Disposition header contains string "attachment" e.g. in filename
	// IE handles data as attachment not inline
	/*
	@TODO
	if ($disposition == 'inline' && $browser->ie && $browser->ver < 9) {
	$filename = str_ireplace('attachment', 'attach', $filename);
	}
	*/
	header("Content-Length: " . $file['size']);
	header("Content-Disposition: $disposition; filename=\"$filename\"");

	$folder->get_attachment($file['_msguid'], $file['fileid'], $file['_mailbox'], true);
	}

	/**
	* Returns file metadata.
	*
	* @param string $file_name Name of a file (with folder path)
	*
	* @throws Exception
	*/
	public function file_info($file_name)
	{
	$file = $this->get_file_object($file_name, $folder);
	if (empty($file)) {
	throw new Exception("Storage error. File not found.", file_api::ERROR_CODE);
	}

	$file = $this->from_file_object($file);

	return array(
	'name' => $file['name'],
	'size' => (int) $file['size'],
	'type' => (string) $file['type'],
	'mtime' => $file['changed']->format($_SESSION['config']['date_format']),
	);
	}

	/**
	* List files in a folder.
	*
	* @param string $folder_name Name of a folder with full path
	* @param array $params List parameters ('sort', 'reverse', 'search')
	*
	* @return array List of files (file properties array indexed by filename)
	* @throws Exception
	*/
	public function file_list($folder_name, $params = array())
	{
	$filter = array(array('type', '=', 'file'));

	if (!empty($params['search'])) {
	foreach ($params['search'] as $idx => $value) {
	switch ($idx) {
	case 'name':
	$filter[] = array('filename', '~', $value);
	break;
	case 'class':
	foreach (file_utils::class2mimetypes($value) as $tag) {
	$for[] = array('tags', '~', ' ' . $tag);
	}
	$filter[] = array($for, 'OR');
	break;
	}
	}
	}

	// get files list
	$folder = $this->get_folder_object($folder_name);
	$files = $folder->select($filter);
	$result = array();

	// convert to kolab_storage files list data format
	foreach ($files as $idx => $file) {
	$file = $this->from_file_object($file);

	if (!isset($file['name'])) {
	continue;
	}

	$filename = $folder_name . file_api::PATH_SEPARATOR . $file['name'];

	$result[$filename] = array(
	'name' => $file['name'],
	'size' => (int) $file['size'],
	'type' => (string) $file['type'],
	'mtime' => $file['changed']->format($_SESSION['config']['date_format']),
	+ 'modified' => $file['changed']->format('U'),
	);
	unset($files[$idx]);
	}

	// @TODO: pagination, search (by filename, mimetype)

	// Sorting
	$sort = !empty($params['sort']) ? $params['sort'] : 'name';
	$index = array();

	- if (in_array($sort, array('name', 'size'))) {
	- foreach ($result as $key => $val) {
	- $index[$key] = $val[$sort];
	- }
	- array_multisort($index, SORT_ASC, SORT_NUMERIC, $result);
	+ if ($sort == 'mtime') {
	+ $sort = 'modified';
	}
	- else if ($sort == 'mtime') {
	+
	+ if (in_array($sort, array('name', 'size', 'modified'))) {
	foreach ($result as $key => $val) {
	- $index[$key] = strtotime($val['mtime']);
	+ $index[$key] = $val[$sort];
	}
	array_multisort($index, SORT_ASC, SORT_NUMERIC, $result);
	}

	if ($params['reverse']) {
	$result = array_reverse($result, true);
	}

	return $result;
	}

	/**
	* Copy a file.
	*
	* @param string $file_name Name of a file (with folder path)
	* @param string $new_name New name of a file (with folder path)
	*
	* @throws Exception
	*/
	public function file_copy($file_name, $new_name)
	{
	$file = $this->get_file_object($file_name, $folder);
	if (empty($file)) {
	throw new Exception("Storage error. File not found.", file_api::ERROR_CODE);
	}

	$new = $this->get_file_object($new_name, $new_folder);
	if (!empty($new)) {
	throw new Exception("Storage error. File exists.", file_api::ERROR_CODE);
	}

	$file = $this->from_file_object($file);

	// Save to temp file
	// @TODO: use IMAP CATENATE extension
	$temp_dir = unslashify($this->rc->config->get('temp_dir'));
	$file_path = tempnam($temp_dir, 'rcmAttmnt');
	$fh = fopen($file_path, 'w');

	if (!$fh) {
	throw new Exception("Storage error. File copying failed.", file_api::ERROR_CODE);
	}

	$folder->get_attachment($file['uid'], $file['fileid'], null, false, $fh, true);
	fclose($fh);

	if (!file_exists($file_path)) {
	throw new Exception("Storage error. File copying failed.", file_api::ERROR_CODE);
	}

	// Update object
	$file['_attachments'] = array(
	0 => array(
	'name' => $file['name'],
	'path' => $file_path,
	'mimetype' => $file['type'],
	'size' => $file['size'],
	));

	$fields = array('created', 'changed', '_attachments', 'notes', 'sensitivity', 'categories', 'x-custom');
	$file = array_intersect_key($file, array_combine($fields, $fields));

	$saved = $new_folder->save($file, 'file');
	if (!$saved) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error updating object on Kolab server"),
	true, false);

	throw new Exception("Storage error. File copying failed.", file_api::ERROR_CODE);
	}
	}

	/**
	* Move (or rename) a file.
	*
	* @param string $file_name Name of a file (with folder path)
	* @param string $new_name New name of a file (with folder path)
	*
	* @throws Exception
	*/
	public function file_move($file_name, $new_name)
	{
	$file = $this->get_file_object($file_name, $folder);
	if (empty($file)) {
	throw new Exception("Storage error. File not found.", file_api::ERROR_CODE);
	}

	$new = $this->get_file_object($new_name, $new_folder);
	if (!empty($new)) {
	throw new Exception("Storage error. File exists.", file_api::ERROR_CODE);
	}

	// Move the file
	if ($folder->name != $new_folder->name) {
	$saved = $folder->move($file['uid'], $new_folder->name);
	if (!$saved) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error moving object on Kolab server"),
	true, false);

	throw new Exception("Storage error. File move failed.", file_api::ERROR_CODE);
	}

	$folder = $new_folder;
	}

	if ($file_name === $new_name) {
	return;
	}

	// Update object (changing the name)
	$cid = key($file['_attachments']);
	$file['_attachments'][$cid]['name'] = $new_name;
	$file['_attachments'][0] = $file['_attachments'][$cid];
	$file['_attachments'][$cid] = false;

	$saved = $folder->save($file, 'file');
	if (!$saved) {
	rcube::raise_error(array(
	'code' => 600, 'type' => 'php',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Error updating object on Kolab server"),
	true, false);

	throw new Exception("Storage error. File rename failed.", file_api::ERROR_CODE);
	}
	}

	/**
	* Create a folder.
	*
	* @param string $folder_name Name of a folder with full path
	*
	* @throws Exception on error
	*/
	public function folder_create($folder_name)
	{
	$folder_name = rcube_charset::convert($folder_name, RCUBE_CHARSET, 'UTF7-IMAP');
	$success = kolab_storage::folder_create($folder_name, 'file');

	if (!$success) {
	throw new Exception("Storage error. Unable to create folder", file_api::ERROR_CODE);
	}
	}

	/**
	* Delete a folder.
	*
	* @param string $folder_name Name of a folder with full path
	*
	* @throws Exception on error
	*/
	public function folder_delete($folder_name)
	{
	$folder_name = rcube_charset::convert($folder_name, RCUBE_CHARSET, 'UTF7-IMAP');
	$success = kolab_storage::folder_delete($folder_name);

	if (!$success) {
	throw new Exception("Storage error. Unable to delete folder.", file_api::ERROR_CODE);
	}
	}

	/**
	* Rename a folder.
	*
	* @param string $folder_name Name of a folder with full path
	* @param string $new_name New name of a folder with full path
	*
	* @throws Exception on error
	*/
	public function folder_rename($folder_name, $new_name)
	{
	$folder_name = rcube_charset::convert($folder_name, RCUBE_CHARSET, 'UTF7-IMAP');
	$new_name = rcube_charset::convert($new_name, RCUBE_CHARSET, 'UTF7-IMAP');
	$success = kolab_storage::folder_rename($folder_name, $new_name);

	if (!$success) {
	throw new Exception("Storage error. Unable to rename folder", file_api::ERROR_CODE);
	}
	}

	/**
	* Returns list of folders.
	*
	* @return array List of folders
	* @throws Exception
	*/
	public function folder_list()
	{
	$storage = $this->rc->get_storage();
	$folders = $storage->list_folders('', '*', 'file');

	if (!is_array($folders)) {
	throw new Exception("Storage error. Unable to get folders list.", file_api::ERROR_CODE);
	}

	foreach ($folders as $folder) {
	$folder = rcube_charset::convert($folder_name, 'UTF7-IMAP', RCUBE_CHARSET);
	}

	return $folders;
	}

	/**
	* Get file object.
	*
	* @param string $file_name Name of a file (with folder path)
	* @param kolab_storage_folder $folder Reference to folder object
	*
	* @return array File data
	* @throws Exception
	*/
	protected function get_file_object(&$file_name, &$folder = null)
	{
	// extract file path and file name
	$path = explode(file_api::PATH_SEPARATOR, $file_name);
	$file_name = array_pop($path);
	$folder_name = implode(file_api::PATH_SEPARATOR, $path);

	if ($folder_name === '') {
	throw new Exception("Missing folder name", file_api::ERROR_CODE);
	}

	// get folder object
	$folder = $this->get_folder_object($folder_name);
	$files = $folder->select(array(
	array('type', '=', 'file'),
	array('filename', '=', $file_name)
	));

	return array_shift($files);
	}

	/**
	* Get folder object.
	*
	* @param string $folder_name Name of a folder with full path
	*
	* @return kolab_storage_folder Folder object
	* @throws Exception
	*/
	protected function get_folder_object($folder_name)
	{
	if ($folder_name === null \|\| $folder_name === '') {
	throw new Exception("Missing folder name", file_api::ERROR_CODE);
	}

	if (empty($this->folders[$folder_name])) {
	$storage = $this->rc->get_storage();
	$separator = $storage->get_hierarchy_delimiter();
	$folder_name = str_replace(file_api::PATH_SEPARATOR, $separator, $folder_name);
	$imap_name = rcube_charset::convert($folder_name, RCUBE_CHARSET, 'UTF7-IMAP');
	$folder = kolab_storage::get_folder($imap_name);

	if (!$folder) {
	throw new Exception("Storage error. Folder not found.", file_api::ERROR_CODE);
	}

	$this->folders[$folder_name] = $folder;
	}

	return $this->folders[$folder_name];
	}

	/**
	* Simplify internal structure of the file object
	*/
	protected function from_file_object($file)
	{
	if (empty($file['_attachments'])) {
	return $file;
	}

	$attachment = array_shift($file['_attachments']);

	$file['name'] = $attachment['name'];
	$file['size'] = $attachment['size'];
	$file['type'] = $attachment['mimetype'];
	$file['fileid'] = $attachment['id'];

	unset($file['_attachments']);

	return $file;
	}

	/**
	* Convert to kolab_format internal structure of the file object
	*/
	protected function to_file_object($file)
	{
	// @TODO if path is empty and fileid exists it is an update
	// get attachment body and save it in path

	$file['_attachments'] = array(
	0 => array(
	'name' => $file['name'],
	'path' => $file['path'],
	'mimetype' => $file['type'],
	'size' => $file['size'],
	));

	unset($file['name']);
	unset($file['size']);
	unset($file['type']);
	unset($file['path']);
	unset($file['fileid']);

	return $file;
	}
	}
	diff --git a/public_html/js/files_api.js b/public_html/js/files_api.js
	index c922223..04ef7eb 100644
	--- a/public_html/js/files_api.js
	+++ b/public_html/js/files_api.js
	@@ -1,386 +1,504 @@
	/*
	+--------------------------------------------------------------------------+
	\| This file is part of the Kolab File API \|
	\| \|
	\| Copyright (C) 2012-2013, Kolab Systems AG \|
	\| \|
	\| 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/> \|
	+--------------------------------------------------------------------------+
	\| Author: Aleksander Machniak <machniak@kolabsys.com> \|
	+--------------------------------------------------------------------------+
	*/

	function files_api()
	{
	var ref = this;

	// default config
	this.translations = {};
	this.env = {
	url: 'api/',
	directory_separator: '/'
	};


	/*********************************************************/
	/******* Basic utilities *******/
	/*********************************************************/

	// set environment variable(s)
	this.set_env = function(p, value)
	{
	if (p != null && typeof p === 'object' && !value)
	for (var n in p)
	this.env[n] = p[n];
	else
	this.env[p] = value;
	};

	// add a localized label(s) to the client environment
	this.tdef = function(p, value)
	{
	if (typeof p == 'string')
	this.translations[p] = value;
	else if (typeof p == 'object')
	$.extend(this.translations, p);
	};

	// return a localized string
	this.t = function(label)
	{
	if (this.translations[label])
	return this.translations[label];
	else
	return label;
	};

	// print a message into browser console
	this.log = function(msg)
	{
	if (window.console && console.log)
	console.log(msg);
	};

	/********************************************************/
	/******* Remote request methods *******/
	/********************************************************/

	// send a http POST request to the API service
	this.post = function(action, postdata, func)
	{
	var url = this.env.url + action, ref = this;

	if (!func) func = 'response';

	this.set_request_time();

	return $.ajax({
	type: 'POST', url: url, data: postdata, dataType: 'json',
	contentType: 'application/json; charset=utf-8',
	success: function(response) { ref[func](response); },
	error: function(o, status, err) { ref.http_error(o, status, err); },
	cache: false,
	beforeSend: function(xmlhttp) { xmlhttp.setRequestHeader('X-Session-Token', ref.env.token); }
	});
	};

	// send a http GET request to the API service
	this.get = function(action, data, func)
	{
	var url = this.env.url;

	if (!func) func = 'response';

	this.set_request_time();
	data.method = action;

	return $.ajax({
	type: 'GET', url: url, data: data,
	success: function(response) { ref[func](response); },
	error: function(o, status, err) { ref.http_error(o, status, err); },
	cache: false,
	beforeSend: function(xmlhttp) { xmlhttp.setRequestHeader('X-Session-Token', ref.env.token); }
	});
	};

	// handle HTTP request errors
	this.http_error = function(request, status, err)
	{
	var errmsg = request.statusText;

	this.set_busy(false);
	request.abort();

	if (request.status && errmsg)
	this.display_message(this.t('servererror') + ' (' + errmsg + ')', 'error');
	};

	this.response = function(response)
	{
	this.update_request_time();
	this.set_busy(false);

	return this.response_parse(response);
	};

	this.response_parse = function(response)
	{
	if (!response \|\| response.status != 'OK') {
	// Logout on invalid-session error
	if (response && response.code == 403)
	this.logout(response);
	else
	this.display_message(response && response.reason ? response.reason : this.t('servererror'), 'error');

	return false;
	}

	return true;
	};


	/*********************************************************/
	/******* Utilities *******/
	/*********************************************************/

	// Called on "session expired" session
	this.logout = function(response) {};

	// set state
	this.set_busy = function(a, message) {};

	// displays error message
	this.display_message = function(label) {};

	// called when a request timed out
	this.request_timed_out = function() {};

	// called on start of the request
	this.set_request_time = function() {};

	// called on request response
	this.update_request_time = function() {};


	/*********************************************************/
	/******* Helpers *******/
	/*********************************************************/

	// compose a valid url with the given parameters
	this.url = function(action, query)
	{
	var k, param = {},
	querystring = typeof query === 'string' ? '&' + query : '';

	if (typeof action !== 'string')
	query = action;
	else if (!query \|\| typeof query !== 'object')
	query = {};

	// overwrite task name
	if (action)
	query.method = action;

	// remove undefined values
	for (k in query) {
	if (query[k] !== undefined && query[k] !== null)
	param[k] = query[k];
	}

	return '?' + $.param(param) + querystring;
	};

	// Folder list parser, converts it into structure
	this.folder_list_parse = function(list)
	{
	var i, n, items, items_len, f, tmp, folder, num = 1,
	len = list.length, folders = {};

	for (i=0; i<len; i++) {
	folder = list[i];
	items = folder.split(this.env.directory_separator);
	items_len = items.length;

	for (n=0; n<items_len-1; n++) {
	tmp = items.slice(0,n+1);
	f = tmp.join(this.env.directory_separator);
	if (!folders[f])
	folders[f] = {name: tmp.pop(), depth: n, id: 'f'+num++, virtual: 1};
	}

	folders[folder] = {name: items.pop(), depth: items_len-1, id: 'f'+num++};
	}

	return folders;
	};

	// folder structure presentation (structure icons)
	this.folder_list_tree = function(folders)
	{
	var i, n, diff, tree = [], folder;

	for (i in folders) {
	items = i.split(this.env.directory_separator);
	items_len = items.length;

	// skip root
	if (items_len < 2) {
	tree = [];
	continue;
	}

	folders[i].tree = [1];

	for (n=0; n<tree.length; n++) {
	folder = tree[n];
	diff = folders[folder].depth - (items_len - 1);
	if (diff >= 0)
	folders[folder].tree[diff] = folders[folder].tree[diff] ? folders[folder].tree[diff] + 2 : 2;
	}

	tree.push(i);
	}

	for (i in folders) {
	if (tree = folders[i].tree) {
	var html = '', divs = [];
	for (n=0; n<folders[i].depth; n++) {
	if (tree[n] > 2)
	divs.push({'class': 'l3', width: 15});
	else if (tree[n] > 1)
	divs.push({'class': 'l2', width: 15});
	else if (tree[n] > 0)
	divs.push({'class': 'l1', width: 15});
	// separator
	else if (divs.length && !divs[divs.length-1]['class'])
	divs[divs.length-1].width += 15;
	else
	divs.push({'class': null, width: 15});
	}

	for (n=divs.length-1; n>=0; n--) {
	if (divs[n]['class'])
	html += '<span class="tree '+divs[n]['class']+'" />';
	else
	html += '<span style="width:'+divs[n].width+'px" />';
	}

	if (html)
	$('#' + folders[i].id + ' span.branch').html(html);
	}
	}
	};

	// convert content-type string into class name
	this.file_type_class = function(type)
	{
	if (!type)
	return '';

	type = type.replace(/[^a-z0-9]/g, '_');

	return type;
	};

	// convert bytes into number with size unit
	this.file_size = function(size)
	{
	if (size >= 1073741824)
	return parseFloat(size/1073741824).toFixed(2) + ' GB';
	if (size >= 1048576)
	return parseFloat(size/1048576).toFixed(2) + ' MB';
	if (size >= 1024)
	return parseInt(size/1024) + ' kB';

	return parseInt(size \|\| 0)+ ' B';
	};

	// Extract file name from full path
	this.file_name = function(path)
	{
	var path = path.split(this.env.directory_separator);
	return path.pop();
	};

	// Extract file path from full path
	this.file_path = function(path)
	{
	var path = path.split(this.env.directory_separator);
	path.pop();
	return path.join(this.env.directory_separator);
	};

	// compare two sortable objects
	this.sort_compare = function(data1, data2)
	{
	- data1 = data1[this.env.sort_col \|\| 'name'];
	- data2 = data2[this.env.sort_col \|\| 'name'];
	+ var key = this.env.sort_col \|\| 'name';

	- if (this.env.sort_col == 'size')
	+ if (key == 'mtime')
	+ key = 'modified';
	+
	+ data1 = data1[key];
	+ data2 = data2[key];
	+
	+ if (key == 'size' \|\| key == 'modified')
	// numeric comparison
	return this.env.sort_reverse ? data1 < data2 : data1 > data2;
	else {
	// use Array.sort() for sting comparison
	var arr = [data1, data2];
	arr.sort(function (a, b) {
	// @TODO: use localeCompare() arguments for better results
	return a.localeCompare(b);
	});

	if (this.env.sort_reverse)
	arr.reverse();

	return arr[0] === data2;
	}
	};

	+ // Checks if specified mimetype is supported natively by the browser
	+ // (or we implement it) and can be displayed in the browser
	+ this.file_type_supported = function(type)
	+ {
	+ var i, t, img = 'jpg\|jpeg\|gif\|bmp\|png',
	+ regexps = [
	+ /^text\/(?!(pdf\|x-pdf))/i,
	+ /^message\/rfc822/i,
	+ ];
	+
	+ if (this.env.browser_capabilities.tif)
	+ img += '\|tiff';
	+
	+ regexps.push(new RegExp('^image/(' + img + ')$', 'i'));
	+
	+ if (this.env.browser_capabilities.pdf) {
	+ regexps.push(/^application\/(pdf\|x-pdf\|acrobat\|vnd.pdf)/i);
	+ regexps.push(/^text\/(pdf\|x-pdf)/i);
	+ }
	+
	+ if (this.env.browser_capabilities.flash)
	+ regexps.push(/^application\/x-shockwave-flash/i);
	+
	+ for (i in regexps)
	+ if (regexps[i].test(type))
	+ return true;
	+
	+ for (i in navigator.mimeTypes) {
	+ t = navigator.mimeTypes[i].type;
	+ if (t == type)
	+ return true;
	+ }
	+ };
	+
	+ // Checks browser capabilities eg. PDF support, TIF support
	+ this.browser_capabilities_check = function()
	+ {
	+ if (!this.env.browser_capabilities)
	+ this.env.browser_capabilities = {};
	+
	+ if (this.env.browser_capabilities.pdf === undefined)
	+ this.env.browser_capabilities.pdf = this.pdf_support_check();
	+
	+ if (this.env.browser_capabilities.flash === undefined)
	+ this.env.browser_capabilities.flash = this.flash_support_check();
	+
	+ if (this.env.browser_capabilities.tif === undefined)
	+ this.tif_support_check();
	+ };
	+
	+ this.tif_support_check = function()
	+ {
	+ var img = new Image();
	+
	+ img.onload = function() { ui.env.browser_capabilities.tif = 1; };
	+ img.onerror = function() { ui.env.browser_capabilities.tif = 0; };
	+ img.src = 'resources/blank.tif';
	+ };
	+
	+ this.pdf_support_check = function()
	+ {
	+ var plugin = navigator.mimeTypes ? navigator.mimeTypes["application/pdf"] : {},
	+ plugins = navigator.plugins,
	+ len = plugins.length,
	+ regex = /Adobe Reader\|PDF\|Acrobat/i;
	+
	+ if (plugin && plugin.enabledPlugin)
	+ return 1;
	+
	+ if (window.ActiveXObject) {
	+ try {
	+ if (axObj = new ActiveXObject("AcroPDF.PDF"))
	+ return 1;
	+ }
	+ catch (e) {}
	+ try {
	+ if (axObj = new ActiveXObject("PDF.PdfCtrl"))
	+ return 1;
	+ }
	+ catch (e) {}
	+ }
	+
	+ for (i=0; i<len; i++) {
	+ plugin = plugins[i];
	+ if (typeof plugin === 'String') {
	+ if (regex.test(plugin))
	+ return 1;
	+ }
	+ else if (plugin.name && regex.test(plugin.name))
	+ return 1;
	+ }
	+
	+ return 0;
	+ };
	+
	+ this.flash_support_check = function()
	+ {
	+ var plugin = navigator.mimeTypes ? navigator.mimeTypes["application/x-shockwave-flash"] : {};
	+
	+ if (plugin && plugin.enabledPlugin)
	+ return 1;
	+
	+ if (window.ActiveXObject) {
	+ try {
	+ if (axObj = new ActiveXObject("ShockwaveFlash.ShockwaveFlash"))
	+ return 1;
	+ }
	+ catch (e) {}
	+ }
	+
	+ return 0;
	+ };
	+
	};

	// Add escape() method to RegExp object
	// http://dev.rubyonrails.org/changeset/7271
	RegExp.escape = function(str)
	{
	return String(str).replace(/([.*+?^=!:${}()\|[\]\/\\])/g, '\\$1');
	};

	// make a string URL safe (and compatible with PHP's rawurlencode())
	function urlencode(str)
	{
	if (window.encodeURIComponent)
	return encodeURIComponent(str).replace('*', '%2A');

	return escape(str)
	.replace('+', '%2B')
	.replace('*', '%2A')
	.replace('/', '%2F')
	.replace('@', '%40');
	};

	function escapeHTML(str)
	{
	return str === undefined ? '' : String(str)
	.replace(/&/g, '&')
	.replace(/>/g, '>')
	.replace(/</g, '<');
	};

	function object_is_empty(obj)
	{
	if (obj)
	for (var i in obj)
	if (i !== null)
	return true;

	return false;
	}
	diff --git a/public_html/js/files_ui.js b/public_html/js/files_ui.js
	index abc2621..1597f8f 100644
	--- a/public_html/js/files_ui.js
	+++ b/public_html/js/files_ui.js
	@@ -1,1364 +1,1251 @@
	/*
	+--------------------------------------------------------------------------+
	\| This file is part of the Kolab File API \|
	\| \|
	\| Copyright (C) 2012-2013, Kolab Systems AG \|
	\| \|
	\| 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/> \|
	+--------------------------------------------------------------------------+
	\| Author: Aleksander Machniak <machniak@kolabsys.com> \|
	+--------------------------------------------------------------------------+
	*/

	function files_ui()
	{
	var ref = this;

	this.request_timeout = 300;
	this.message_time = 3000;
	this.events = {};
	this.commands = {};
	this.env = {
	url: 'api/',
	sort_col: 'name',
	sort_reverse: 0,
	search_threads: 1,
	directory_separator: '/'
	};

	// set jQuery ajax options
	$.ajaxSetup({
	cache: false,
	error: function(request, status, err) { ref.http_error(request, status, err); },
	beforeSend: function(xmlhttp) { xmlhttp.setRequestHeader('X-Session-Token', ref.env.token); }
	});


	/*********************************************************/
	/******* basic utilities *******/
	/*********************************************************/

	// initialize interface
	this.init = function()
	{
	if (!this.env.token)
	return;

	if (this.env.task == 'main') {
	this.enable_command('folder.list', 'folder.create', 'file.search', true);
	this.command('folder.list');
	}
	else if (this.env.task == 'file') {
	this.load_file('#file-content', this.env.filedata);
	this.enable_command('file.delete', 'file.download', true);
	}

	this.browser_capabilities_check();
	};

	// set environment variable(s)
	this.set_env = function(p, value)
	{
	if (p != null && typeof p === 'object' && !value)
	for (var n in p)
	this.env[n] = p[n];
	else
	this.env[p] = value;
	};

	// execute a specific command on the web client
	this.command = function(command, props, obj)
	{
	if (obj && obj.blur)
	obj.blur();

	if (this.busy)
	return false;

	if (!this.commands[command])
	return;

	var ret = undefined,
	func = command.replace(/[^a-z]/g, '_'),
	task = command.replace(/\.[a-z-_]+$/g, '');

	if (this[func] && typeof this[func] === 'function') {
	ret = this[func](props);
	}

	return ret === false ? false : obj ? false : true;
	};

	this.set_busy = function(a, message)
	{
	if (a && this.busy)
	return;

	if (a && message) {
	var msg = this.t(message);
	if (msg == message)
	msg = 'Loading...';

	this.display_message(msg, 'loading');
	}
	else if (!a) {
	this.hide_message('loading');
	}

	this.busy = a;

	// if (this.gui_objects.editform)
	// this.lock_form(this.gui_objects.editform, a);

	// clear pending timer
	if (this.request_timer)
	clearTimeout(this.request_timer);

	// set timer for requests
	if (a && this.request_timeout)
	this.request_timer = window.setTimeout(function() { ref.request_timed_out(); }, this.request_timeout * 1000);
	};

	// called when a request timed out
	this.request_timed_out = function()
	{
	this.set_busy(false);
	this.display_message('Request timed out!', 'error');
	};

	// Add variable to GET string, replace old value if exists
	this.add_url = function(url, name, value)
	{
	value = urlencode(value);

	if (/(\?.*)$/.test(url)) {
	var urldata = RegExp.$1,
	datax = RegExp('((\\?\|&)'+RegExp.escape(name)+'=[^&]*)');

	if (datax.test(urldata))
	urldata = urldata.replace(datax, RegExp.$2 + name + '=' + value);
	else
	urldata += '&' + name + '=' + value

	return url.replace(/(\?.*)$/, urldata);
	}

	return url + '?' + name + '=' + value;
	};

	this.trigger_event = function(event, data)
	{
	if (this.events[event])
	for (var i in this.events[event])
	this.events[event][i](data);
	};

	this.add_event_listener = function(event, func)
	{
	if (!this.events[event])
	this.events[event] = [];

	this.events[event].push(func);
	};

	this.buttons = function(p)
	{
	$.each(p, function(i, v) {
	if (!ui.buttons[i])
	ui.buttons[i] = [];

	if (typeof v == 'object')
	ui.buttons[i] = $.merge(ui.buttons[i], v);
	else
	ui.buttons[i].push(v);
	});
	};

	this.enable_command = function()
	{
	var i, n, args = Array.prototype.slice.call(arguments),
	enable = args.pop(), cmd;

	for (n=0; n<args.length; n++) {
	cmd = args[n];
	// argument of type array
	if (typeof cmd === 'string') {
	this.commands[cmd] = enable;
	if (this.buttons[cmd])
	$.each(this.buttons[cmd], function (i, button) {
	$('#'+button)[enable ? 'removeClass' : 'addClass']('disabled');
	});
	}
	// push array elements into commands array
	else {
	for (i in cmd)
	args.push(cmd[i]);
	}
	}
	};


	/*********************************************************/
	/******* GUI functionality *******/
	/*********************************************************/

	// write to the document/window title
	this.set_pagetitle = function(title)
	{
	if (title && document.title)
	document.title = title;
	};

	// display a system message (types: loading, notice, error)
	this.display_message = function(msg, type, timeout)
	{
	var obj, ref = this;

	if (!type)
	type = 'notice';
	if (msg)
	msg = this.t(msg);

	if (type == 'loading') {
	timeout = this.request_timeout * 1000;
	if (!msg)
	msg = this.t('loading');
	}
	else if (!timeout)
	timeout = this.message_time * (type == 'error' \|\| type == 'warning' ? 2 : 1);

	obj = $('<div>');

	if (type != 'loading') {
	msg = '<div><span>' + msg + '</span></div>';
	obj.addClass(type).click(function() { return ref.hide_message(); });
	}

	if (timeout > 0)
	window.setTimeout(function() { ref.hide_message(type, type != 'loading'); }, timeout);

	obj.attr('id', type == 'loading' ? 'loading' : 'message')
	.appendTo('body').html(msg).show();
	};

	// make a message to disapear
	this.hide_message = function(type, fade)
	{
	if (type == 'loading')
	$('#loading').remove();
	else
	$('#message').fadeOut('normal', function() { $(this).remove(); });
	};

	this.set_watermark = function(id)
	{
	if (this.env.watermark)
	$('#'+id).html(this.env.watermark);
	};


	/********************************************************/
	/******* Remote request methods *******/
	/********************************************************/

	// send a http POST request to the server
	this.http_post = function(action, postdata)
	{
	var url = this.url(action);

	if (postdata && typeof postdata === 'object')
	postdata.remote = 1;
	else {
	if (!postdata)
	postdata = '';
	postdata += '&remote=1';
	}

	this.set_request_time();

	return $.ajax({
	type: 'POST', url: url, data: postdata, dataType: 'json',
	success: function(response) { ui.http_response(response); },
	error: function(o, status, err) { ui.http_error(o, status, err); }
	});
	};

	// handle HTTP response
	this.http_response = function(response)
	{
	var i;

	if (!response)
	return;

	// set env vars
	if (response.env)
	this.set_env(response.env);

	// we have translation labels to add
	if (typeof response.labels === 'object')
	this.tdef(response.labels);

	// HTML page elements
	if (response.objects)
	for (i in response.objects)
	$('#'+i).html(response.objects[i]);

	this.update_request_time();
	this.set_busy(false);

	// if we get javascript code from server -> execute it
	if (response.exec)
	eval(response.exec);

	this.trigger_event('http-response', response);
	};

	// handle HTTP request errors
	this.http_error = function(request, status, err)
	{
	var errmsg = request.statusText;

	this.set_busy(false);
	request.abort();

	if (request.status && errmsg)
	this.display_message(this.t('servererror') + ' (' + errmsg + ')', 'error');
	};


	/********************************************************/
	/******* Helper methods *******/
	/********************************************************/

	// disable/enable all fields of a form
	this.lock_form = function(form, lock)
	{
	if (!form \|\| !form.elements)
	return;

	var n, len, elm;

	if (lock)
	this.disabled_form_elements = [];

	for (n=0, len=form.elements.length; n<len; n++) {
	elm = form.elements[n];

	if (elm.type == 'hidden')
	continue;
	// remember which elem was disabled before lock
	if (lock && elm.disabled)
	this.disabled_form_elements.push(elm);
	// check this.disabled_form_elements before inArray() as a workaround for FF5 bug
	// http://bugs.jquery.com/ticket/9873
	else if (lock \|\| (this.disabled_form_elements && $.inArray(elm, this.disabled_form_elements)<0))
	elm.disabled = lock;
	}
	};

	this.set_request_time = function()
	{
	this.env.request_time = (new Date()).getTime();
	};

	// Update request time element
	this.update_request_time = function()
	{
	if (this.env.request_time) {
	var t = ((new Date()).getTime() - this.env.request_time)/1000,
	el = $('#reqtime');
	el.text(el.text().replace(/[0-9.,]+/, t));
	}
	};

	// position and display popup
	this.popup_show = function(e, popup)
	{
	var popup = $(popup),
	pos = this.mouse_pos(e),
	win = $(window),
	w = popup.width(),
	h = popup.height(),
	left = pos.left - w,
	top = pos.top;

	if (top + h > win.height())
	top -= h;
	if (left + w > win.width())
	left -= w;

	popup.css({left: left + 'px', top: top + 'px'})
	.click(function(e) { e.stopPropagation(); $(this).hide(); }).show();
	e.stopPropagation();
	};

	// Return absolute mouse position of an event
	this.mouse_pos = function(e)
	{
	if (!e) e = window.event;

	var mX = (e.pageX) ? e.pageX : e.clientX,
	mY = (e.pageY) ? e.pageY : e.clientY;

	if (document.body && document.all) {
	mX += document.body.scrollLeft;
	mY += document.body.scrollTop;
	}

	if (e._offset) {
	mX += e._offset.left;
	mY += e._offset.top;
	}

	return { left:mX, top:mY };
	};

	this.serialize_form = function(id)
	{
	var i, v, json = {},
	form = $(id),
	query = form.serializeArray();

	for (i in query)
	json[query[i].name] = query[i].value;

	// serializeArray() doesn't work properly for multi-select
	$('select[multiple="multiple"]', form).each(function() {
	var name = this.name;
	json[name] = [];
	$(':selected', this).each(function() {
	json[name].push(this.value);
	});
	});

	return json;
	};


	/*********************************************************/
	/******* Commands *******/
	/*********************************************************/

	this.logout = function()
	{
	this.main_logout();
	};

	this.main_logout = function(params)
	{
	location.href = '?task=main&action=logout' + (params ? '&' + $.param(params) : '');
	return false;
	};

	// folder list request
	this.folder_list = function()
	{
	this.set_busy(true, 'loading');
	this.get('folder_list', {}, 'folder_list_response');
	};

	// folder list response handler
	this.folder_list_response = function(response)
	{
	if (!this.response(response))
	return;

	var elem = $('#folderlist'), table = $('table', elem);

	this.env.folders = this.folder_list_parse(response.result);

	table.empty();

	$.each(this.env.folders, function(i, f) {
	var row = $('<tr><td><span class="branch"></span><span class="name"></span></td></tr>'),
	span = $('span.name', row);

	span.text(f.name);
	row.attr('id', f.id);

	if (f.depth)
	$('span.branch', row).width(15 * f.depth);

	if (f.virtual)
	row.addClass('virtual');
	else
	span.click(function() { ui.folder_select(i); });

	if (i == ui.env.folder)
	row.addClass('selected');

	table.append(row);
	});

	// add virtual collections
	$.each(['audio', 'video', 'image', 'document'], function(i, n) {
	var row = $('<tr><td><span class="name"></span></td></tr>'),
	span = $('span.name', row);

	row.attr('id', 'folder-collection-' + n);
	span.text(ui.t('collection.' + n))
	.click(function() { ui.folder_select(n, true); });

	if (n == ui.env.collection)
	row.addClass('selected');

	table.append(row);
	});

	// add tree icons
	this.folder_list_tree(this.env.folders);
	};

	this.folder_select = function(folder, is_collection)
	{
	this.env.search = null;
	this.file_search_stop();

	var list = $('#folderlist');
	$('tr.selected', list).removeClass('selected');

	if (is_collection) {
	var found = $('#folder-collection-' + folder, list).addClass('selected');

	this.env.folder = null;
	this.enable_command('file.list', true);
	this.enable_command('folder.delete', 'folder.edit', 'file.upload', false);
	this.command('file.list', {collection: folder});
	}
	else {
	var found = $('#' + this.env.folders[folder].id, list).addClass('selected');

	this.env.collection = null;
	this.enable_command('file.list', 'folder.delete', 'folder.edit', 'file.upload', found.length);
	this.command('file.list', {folder: folder});
	}
	};

	this.folder_unselect = function()
	{
	this.env.search = null;
	this.env.folder = null;
	this.env.collection = null;
	this.file_search_stop();

	var list = $('#folderlist');
	$('tr.selected', list).removeClass('selected');

	this.enable_command('file.list', 'folder.delete', 'folder.edit', 'file.upload', false);
	};

	// folder create request
	this.folder_create = function(folder)
	{
	if (!folder) {
	this.folder_create_start();
	return;
	}

	this.set_busy(true, 'saving');
	this.get('folder_create', {folder: folder}, 'folder_create_response');
	};

	// folder create response handler
	this.folder_create_response = function(response)
	{
	if (!this.response(response))
	return;

	this.folder_list();
	};

	// folder edit (rename) request
	this.folder_edit = function(folder)
	{
	if (!folder) {
	this.folder_edit_start();
	return;
	}

	this.set_busy(true, 'saving');
	this.get('folder_rename', {folder: folder.folder, 'new': folder['new']}, 'folder_rename_response');
	};

	// folder rename response handler
	this.folder_rename_response = function(response)
	{
	if (!this.response(response))
	return;

	this.env.folder = this.env.folder_rename;
	this.folder_list();
	};

	// folder delete request
	this.folder_delete = function(folder)
	{
	if (folder === undefined)
	folder = this.env.folder;

	if (!folder)
	return;

	// @todo: confirm

	this.set_busy(true, 'saving');
	this.get('folder_delete', {folder: folder}, 'folder_delete_response');
	};

	// folder delete response handler
	this.folder_delete_response = function(response)
	{
	if (!this.response(response))
	return;

	this.env.folder = null;
	$('#filelist tbody').empty();
	this.enable_command('folder.delete', 'folder.edit', 'file.list', 'file.search', 'file.upload', false);
	this.folder_list();
	};

	// file list request
	this.file_list = function(params)
	{
	if (!params)
	params = {};

	if (params.all_folders) {
	params.collection = null;
	params.folder = null;
	this.folder_unselect();
	}

	if (params.collection == undefined)
	params.collection = this.env.collection;
	if (params.folder == undefined)
	params.folder = this.env.folder;
	if (params.sort == undefined)
	params.sort = this.env.sort_col;
	if (params.reverse == undefined)
	params.reverse = this.env.sort_reverse;
	if (params.search == undefined)
	params.search = this.env.search;

	this.env.collection = params.collection;
	this.env.folder = params.folder;
	this.env.sort_col = params.sort;
	this.env.sort_reverse = params.reverse;

	// empty the list
	$('#filelist tbody').empty();
	this.env.file_list = [];
	this.env.list_shift_start = null;
	this.enable_command('file.open', 'file.get', 'file.rename', 'file.delete', false);

	// request
	if (params.collection \|\| params.all_folders)
	this.file_list_loop(params);
	else {
	this.set_busy(true, 'loading');
	this.get('file_list', params, 'file_list_response');
	}
	};

	// call file.list request for every folder (used for search and virt. collections)
	this.file_list_loop = function(params)
	{
	var i, folders = [], limit = Math.max(this.env.search_threads \|\| 1, 1);

	if (params.collection) {
	if (!params.search)
	params.search = {};
	params.search['class'] = params.collection;
	delete params['collection'];
	}

	delete params['all_folders'];

	$.each(this.env.folders, function(i, f) {
	if (!f.virtual)
	folders.push(i);
	});

	this.env.folders_loop = folders;
	this.env.folders_loop_params = params;
	this.env.folders_loop_lock = false;

	for (i=0; i<folders.length && i<limit; i++) {
	this.set_busy(true, 'loading');
	params.folder = folders.shift();
	this.get('file_list', params, 'file_list_loop_response');
	}
	};

	// file list response handler
	this.file_list_response = function(response)
	{
	if (!this.response(response))
	return;

	var table = $('#filelist'), list = [];

	$.each(response.result, function(key, data) {
	var row = ui.file_list_row(key, data);
	table.append(row);
	data.row = row;
	list.push(data);
	});

	this.env.file_list = list;
	};

	// file list response handler for loop'ed request
	this.file_list_loop_response = function(response)
	{
	var i, folders = this.env.folders_loop,
	params = this.env.folders_loop_params,
	limit = Math.max(this.env.search_threads \|\| 1, 1),
	valid = this.response(response);

	for (i=0; i<folders.length && i<limit; i++) {
	this.set_busy(true, 'loading');
	params.folder = folders.shift();
	this.get('file_list', params, 'file_list_loop_response');
	}

	if (!valid)
	return;

	this.file_list_loop_result_add(response.result);
	};

	// add files from list request to the table (with sorting)
	this.file_list_loop_result_add = function(result)
	{
	// chack if result (hash-array) is empty
	if (!object_is_empty(result))
	return;

	if (this.env.folders_loop_lock) {
	setTimeout(function() { ui.file_list_loop_result_add(result); }, 100);
	return;
	}

	// lock table, other list responses will wait
	this.env.folders_loop_lock = true;

	var n, i, len, elem, list = [],
	table = $('#filelist'), rows = $('tbody tr', table);

	for (n=0, len=this.env.file_list.length; n<len; n++) {
	elem = this.env.file_list[n];
	for (i in result) {
	if (!this.sort_compare(elem, result[i]))
	break;

	var row = ui.file_list_row(i, result[i]);
	elem.row.before(row);
	result[i].row = row;
	list.push(result[i]);
	delete result[i];
	}

	list.push(elem);
	}

	// add the rest of rows
	$.each(result, function(key, data) {
	var row = ui.file_list_row(key, data);
	table.append(row);
	result[key].row = row;
	list.push(result[key]);
	});

	this.env.file_list = list;
	this.env.folders_loop_lock = false;
	};

	// sort files list (without API request)
	this.file_list_sort = function(col, reverse)
	{
	var n, len, list = this.env.file_list,
	table = $('#filelist'), tbody = $('<tbody>');

	this.env.sort_col = col;
	this.env.sort_reverse = reverse;

	- if (!list)
	+ if (!list \|\| !list.length)
	return;

	// sort the list
	list.sort(function (a, b) {
	return ui.sort_compare(a, b);
	});

	// add rows to the new body
	for (n=0, len=list.length; n<len; n++) {
	tbody.append(list[n].row);
	}

	// replace table bodies
	$('tbody', table).replaceWith(tbody);
	};

	this.file_list_row = function(filename, data)
	{
	var row = $('<tr><td class="filename"></td>'
	+' <td class="filemtime"></td><td class="filesize"></td></tr>'),
	link = $('<span></span>').text(data.name).click(function(e) { ui.file_menu(e, filename, data.type); });

	$('td.filename', row).addClass(ui.file_type_class(data.type)).append(link);
	$('td.filemtime', row).text(data.mtime);
	$('td.filesize', row).text(ui.file_size(data.size));

	row.attr('data-file', filename)
	.click(function(e) { ui.file_list_click(e, this); });

	// disables selection in IE
	if (document.all)
	row.on('selectstart', function() { return false; });

	return row;
	};

	this.file_list_click = function(e, row)
	{
	var list = $('#filelist'), org = row, row = $(row),
	found, selected, shift = this.env.list_shift_start;

	if (e.shiftKey && shift && org != shift) {
	$('tr', list).each(function(i, r) {
	if (r == org) {
	found = 1;
	$(r).addClass('selected');
	return;
	}
	else if (!selected && r == shift) {
	selected = 1;
	return;
	}

	if ((!found && selected) \|\| (found && !selected))
	$(r).addClass('selected');
	else
	$(r).removeClass('selected');
	});
	}
	else if (e.ctrlKey)
	row.toggleClass('selected');
	else {
	$('tr.selected', list).removeClass('selected');
	$(row).addClass('selected');
	this.env.list_shift_start = org;
	}

	selected = $('tr.selected', list).length;

	if (!selected)
	this.env.list_shift_start = null;

	this.enable_command('file.delete', selected);
	this.enable_command('file.open', 'file.get', 'file.rename', selected == 1);
	};

	// file delete request
	this.file_delete = function(file)
	{
	if (!file) {
	file = [];

	if (this.env.file)
	file.push(this.env.file);
	else
	$('#filelist tr.selected').each(function() {
	file.push($(this).data('file'));
	});
	}

	this.set_busy(true, 'deleting');
	this.get('file_delete', {file: file}, 'file_delete_response');
	};

	// file delete response handler
	this.file_delete_response = function(response)
	{
	if (!this.response(response))
	return;

	if (this.env.file) {
	// @TODO: reload list if on the same folder only
	if (window.opener && window.opener.ui)
	window.opener.ui.file_list();
	window.close();
	}
	else
	this.file_list();
	};

	// file rename request
	this.file_move = function(file, newname)
	{
	if (file === newname)
	return;

	this.set_busy(true, 'saving');
	this.get('file_move', {file: file, 'new': newname}, 'file_move_response');
	};

	// file delete response handler
	this.file_move_response = function(response)
	{
	if (!this.response(response))
	return;

	this.file_list();
	};

	this.file_download = function(file)
	{
	if (!file)
	file = this.env.file;

	location.href = this.env.url + this.url('file_get', {token: this.env.token, file: file, 'force-download': 1});
	};

	this.file_menu = function(e, file, type)
	{
	var menu = $('#file-menu'),
	open_action = $('li.file-open > a', menu);

	if (this.file_type_supported(type))
	open_action.attr({target: '_blank', href: '?' + $.param({task: 'file', action: 'open', token: this.env.token, file: file})})
	.removeClass('disabled').off('click');
	else
	open_action.click(function() { return false; }).addClass('disabled');

	$('li.file-download > a', menu)
	.attr({href: this.env.url + this.url('file_get', {token: this.env.token, file: file, 'force-download': 1})});
	$('li.file-delete > a', menu).off('click').click(function() { ui.file_delete(file); });
	$('li.file-rename > a', menu).off('click').click(function() { ui.file_rename_start(e); });

	this.popup_show(e, menu);
	};

	this.file_rename_start = function(e)
	{
	var list = $('#filelist'),
	tr = $(e.target).parents('tr'),
	td = $('td.filename', tr),
	file = tr.data('file'),
	name = this.file_name(file),
	input = $('<input>').attr({type: 'text', name: 'filename', 'class': 'filerename'})
	.val(name).data('file', file)
	.click(function(e) { e.stopPropagation(); })
	.keydown(function(e) {
	switch (e.which) {
	case 27: // ESC
	ui.file_rename_stop();
	break;
	case 13: // Enter
	var elem = $(this),
	newname = elem.val(),
	oldname = elem.data('file'),
	path = ui.file_path(file);

	ui.file_move(oldname, path + ui.env.directory_separator + newname);
	elem.parent().text(newname);
	break;
	}
	});

	$('span', td).text('').append(input);
	input.focus();
	};

	this.file_rename_stop = function()
	{
	$('input.filerename').each(function() {
	var elem = $(this), name = ui.file_name(elem.data('file'));
	elem.parent().text(name);
	});
	};

	// file upload request
	this.file_upload = function()
	{
	var form = $('#uploadform'),
	field = $('input[type=file]', form).get(0),
	files = field.files ? field.files.length : field.value ? 1 : 0;

	if (files) {
	// submit form and read server response
	this.file_upload_form(form, 'file_create', function(e) {
	var doc, response;

	try {
	doc = this.contentDocument ? this.contentDocument : this.contentWindow.document;
	response = doc.body.innerHTML;

	// in Opera onload is called twice, once with empty body
	if (!response)
	return;
	// response may be wrapped in <pre> tag
	if (response.match(/^<pre[^>]>(.)<\/pre>$/i)) {
	response = RegExp.$1;
	}

	response = eval('(' + response + ')');
	} catch (err) {
	response = {status: 'ERROR'};
	}

	if (ui.response_parse(response))
	ui.file_list();
	});
	}
	};

	// post the given form to a hidden iframe
	this.file_upload_form = function(form, action, onload)
	{
	var ts = new Date().getTime(),
	frame_name = 'fileupload'+ts;
	/*
	// upload progress support
	if (this.env.upload_progress_name) {
	var fname = this.env.upload_progress_name,
	field = $('input[name='+fname+']', form);

	if (!field.length) {
	field = $('<input>').attr({type: 'hidden', name: fname});
	field.prependTo(form);
	}
	field.val(ts);
	}
	*/
	// have to do it this way for IE
	// otherwise the form will be posted to a new window
	if (document.all) {
	var html = '<iframe id="'+frame_name+'" name="'+frame_name+'"'
	+ ' src="program/resources/blank.gif" style="width:0;height:0;visibility:hidden;"></iframe>';
	document.body.insertAdjacentHTML('BeforeEnd', html);
	}
	// for standards-compliant browsers
	else
	$('<iframe>')
	.attr({name: frame_name, id: frame_name})
	.css({border: 'none', width: 0, height: 0, visibility: 'hidden'})
	.appendTo(document.body);

	// handle upload errors, parsing iframe content in onload
	$('#'+frame_name).bind('load', {ts:ts}, onload);

	$(form).attr({
	target: frame_name,
	action: this.env.url + this.url(action, {folder: this.env.folder, token: this.env.token, uploadid:ts}),
	method: 'POST'
	}).attr(form.encoding ? 'encoding' : 'enctype', 'multipart/form-data')
	.submit();
	};

	// Display file search form
	this.file_search = function()
	{
	var form = this.form_show('file-search'),
	has_folder = this.env.folder \|\| this.env.collection,
	radio1 = $('input[name="all_folders"][value="0"]', form);

	$('input[name="name"]', form).val('').focus();

	if (has_folder)
	radio1.prop('disabled', false).click();
	else {
	radio1.prop('disabled', true);
	$('input[name="all_folders"][value="1"]', form).click();
	}
	};

	// Hide file search form
	this.file_search_stop = function()
	{
	if (this.env.search)
	this.file_list(null, {search: null});

	this.form_hide('file-search');
	this.env.search = null;
	};

	// Execute file search
	this.file_search_submit = function()
	{
	var form = this.form_show('file-search'),
	value = $('input[name="name"]', form).val(),
	all = $('input[name="all_folders"]:checked', form).val();

	if (value) {
	this.env.search = {name: value};
	this.file_list({search: this.env.search, all_folders: all == 1});
	}
	else
	this.file_search_stop();
	};

	// Display folder creation form
	this.folder_create_start = function()
	{
	var form = this.form_show('folder-create');
	$('input[name="name"]', form).val('').focus();
	$('input[name="parent"]', form).prop('checked', this.env.folder)
	.prop('disabled', !this.env.folder);
	};

	// Hide folder creation form
	this.folder_create_stop = function()
	{
	this.form_hide('folder-create');
	};

	// Submit folder creation form
	this.folder_create_submit = function()
	{
	var folder = '', data = this.serialize_form('#folder-create-form');

	if (!data.name)
	return;

	if (data.parent && this.env.folder)
	folder = this.env.folder + this.env.directory_separator;

	folder += data.name;

	this.folder_create_stop();
	this.command('folder.create', folder);
	};

	// Display folder edit form
	this.folder_edit_start = function()
	{
	var form = this.form_show('folder-edit'),
	arr = this.env.folder.split(this.env.directory_separator),
	name = arr.pop();

	this.env.folder_edit_path = arr.join(this.env.directory_separator);

	$('input[name="name"]', form).val(name).focus();
	};

	// Hide folder edit form
	this.folder_edit_stop = function()
	{
	this.form_hide('folder-edit');
	};

	// Submit folder edit form
	this.folder_edit_submit = function()
	{
	var folder = '', data = this.serialize_form('#folder-edit-form');

	if (!data.name)
	return;

	if (this.env.folder_edit_path)
	folder = this.env.folder_edit_path + this.env.directory_separator;

	folder += data.name;
	this.env.folder_rename = folder;

	this.folder_edit_stop();
	this.command('folder.edit', {folder: this.env.folder, 'new': folder});
	};


	/*********************************************************/
	/******* Utilities *******/
	/*********************************************************/

	// Display folder creation form
	this.form_show = function(name)
	{
	var form = $('#' + name + '-form');
	$('#forms > form').hide();
	form.show();
	$('#taskcontent').css('top', form.height() + 20);

	return form;
	};

	// Display folder creation form
	this.form_hide = function(name)
	{
	var form = $('#' + name + '-form');
	form.hide();
	$('#taskcontent').css('top', 10);
	};

	- // Checks if specified mimetype is supported natively by the browser
	- // (or we implement it) and can be displayed in the browser
	- this.file_type_supported = function(type)
	- {
	- var i, t, img = 'jpg\|jpeg\|gif\|bmp\|png',
	- regexps = [
	- /^text\/(?!(pdf\|x-pdf))/i,
	- /^message\/rfc822/i,
	- ];
	-
	- if (this.env.browser_capabilities.tif)
	- img += '\|tiff';
	-
	- regexps.push(new RegExp('^image/(' + img + ')$', 'i'));
	-
	- if (this.env.browser_capabilities.pdf) {
	- regexps.push(/^application\/(pdf\|x-pdf\|acrobat\|vnd.pdf)/i);
	- regexps.push(/^text\/(pdf\|x-pdf)/i);
	- }
	-
	- if (this.env.browser_capabilities.flash)
	- regexps.push(/^application\/x-shockwave-flash/i);
	-
	- for (i in regexps)
	- if (regexps[i].test(type))
	- return true;
	-
	- for (i in navigator.mimeTypes) {
	- t = navigator.mimeTypes[i].type;
	- if (t == type)
	- return true;
	- }
	- };
	-
	- // Checks browser capabilities eg. PDF support, TIF support
	- this.browser_capabilities_check = function()
	- {
	- if (!this.env.browser_capabilities)
	- this.env.browser_capabilities = {};
	-
	- if (this.env.browser_capabilities.pdf === undefined)
	- this.env.browser_capabilities.pdf = this.pdf_support_check();
	-
	- if (this.env.browser_capabilities.flash === undefined)
	- this.env.browser_capabilities.flash = this.flash_support_check();
	-
	- if (this.env.browser_capabilities.tif === undefined)
	- this.tif_support_check();
	- };
	-
	- this.tif_support_check = function()
	- {
	- var img = new Image();
	-
	- img.onload = function() { ui.env.browser_capabilities.tif = 1; };
	- img.onerror = function() { ui.env.browser_capabilities.tif = 0; };
	- img.src = 'resources/blank.tif';
	- };
	-
	- this.pdf_support_check = function()
	- {
	- var plugin = navigator.mimeTypes ? navigator.mimeTypes["application/pdf"] : {},
	- plugins = navigator.plugins,
	- len = plugins.length,
	- regex = /Adobe Reader\|PDF\|Acrobat/i;
	-
	- if (plugin && plugin.enabledPlugin)
	- return 1;
	-
	- if (window.ActiveXObject) {
	- try {
	- if (axObj = new ActiveXObject("AcroPDF.PDF"))
	- return 1;
	- }
	- catch (e) {}
	- try {
	- if (axObj = new ActiveXObject("PDF.PdfCtrl"))
	- return 1;
	- }
	- catch (e) {}
	- }
	-
	- for (i=0; i<len; i++) {
	- plugin = plugins[i];
	- if (typeof plugin === 'String') {
	- if (regex.test(plugin))
	- return 1;
	- }
	- else if (plugin.name && regex.test(plugin.name))
	- return 1;
	- }
	-
	- return 0;
	- };
	-
	- this.flash_support_check = function()
	- {
	- var plugin = navigator.mimeTypes ? navigator.mimeTypes["application/x-shockwave-flash"] : {};
	-
	- if (plugin && plugin.enabledPlugin)
	- return 1;
	-
	- if (window.ActiveXObject) {
	- try {
	- if (axObj = new ActiveXObject("ShockwaveFlash.ShockwaveFlash"))
	- return 1;
	- }
	- catch (e) {}
	- }
	-
	- return 0;
	- };
	-
	// loads a file content into an iframe (with loading image)
	this.load_file = function(content, filedata)
	{
	var href = filedata.href, iframe = $(content),
	div = iframe.parent(),
	loader = $('#loader'),
	offset = div.offset(),
	w = loader.width(), h = loader.height(),
	width = div.width(), height = div.height();

	loader.css({
	top: offset.top + height/2 - h/2 - 20,
	left: offset.left + width/2 - w/2
	}).show();
	iframe.css('opacity', 0.1)
	.load(function() { ui.loader_hide(this); })
	.attr('src', href);

	// some content, e.g. movies or flash doesn't execute onload on iframe
	// let's wait some time and check document ready state
	if (!/^text/i.test(filedata.mimetype))
	setTimeout(function() {
	$(iframe.get(0).contentWindow.document).ready(function() {
	parent.ui.loader_hide(content);
	});
	}, 1000);
	};

	// hide content loader element, show content element
	this.loader_hide = function(content)
	{
	$('#loader').hide();
	$(content).css('opacity', 1);
	};
	};

	// Initialize application object (don't change var name!)
	var ui = $.extend(new files_api(), new files_ui());

	// general click handler
	$(document).click(function() {
	$('.popup').hide();
	ui.file_rename_stop();
	}).ready(function() {
	ui.init();
	});

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