From 3412e50b54e3daac8745234e21ab6e72be0ed165 Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <thomas@roundcube.net>
Date: Wed, 04 Jun 2014 11:20:33 -0400
Subject: [PATCH] Fix attachment menu structure and aria-attributes

---
 program/include/rcmail.php | 3687 ++++++++++++++++++++++++++++++++---------------------------
 1 files changed, 2,007 insertions(+), 1,680 deletions(-)

diff --git a/program/include/rcmail.php b/program/include/rcmail.php
index 05cfefa..5a5d4cb 100644
--- a/program/include/rcmail.php
+++ b/program/include/rcmail.php
@@ -5,8 +5,8 @@
  | program/include/rcmail.php                                            |
  |                                                                       |
  | This file is part of the Roundcube Webmail client                     |
- | Copyright (C) 2008-2011, The Roundcube Dev Team                       |
- | Copyright (C) 2011, Kolab Systems AG                                  |
+ | Copyright (C) 2008-2014, The Roundcube Dev Team                       |
+ | Copyright (C) 2011-2014, Kolab Systems AG                             |
  |                                                                       |
  | Licensed under the GNU General Public License version 3 or            |
  | any later version with exceptions for skins & plugins.                |
@@ -17,1775 +17,2102 @@
  |   instances of all 'global' objects like db- and imap-connections     |
  +-----------------------------------------------------------------------+
  | Author: Thomas Bruederli <roundcube@gmail.com>                        |
+ | Author: Aleksander Machniak <alec@alec.pl>                            |
  +-----------------------------------------------------------------------+
-
- $Id$
-
 */
-
 
 /**
  * Application class of Roundcube Webmail
  * implemented as singleton
  *
- * @package Core
+ * @package Webmail
  */
-class rcmail
+class rcmail extends rcube
 {
-  /**
-   * Main tasks.
-   *
-   * @var array
-   */
-  static public $main_tasks = array('mail','settings','addressbook','login','logout','utils','dummy');
+    /**
+     * Main tasks.
+     *
+     * @var array
+     */
+    static public $main_tasks = array('mail','settings','addressbook','login','logout','utils','dummy');
 
-  /**
-   * Singleton instace of rcmail
-   *
-   * @var rcmail
-   */
-  static private $instance;
+    /**
+     * Current task.
+     *
+     * @var string
+     */
+    public $task;
 
-  /**
-   * Stores instance of rcube_config.
-   *
-   * @var rcube_config
-   */
-  public $config;
+    /**
+     * Current action.
+     *
+     * @var string
+     */
+    public $action    = '';
+    public $comm_path = './';
+    public $filename  = '';
 
-  /**
-   * Stores rcube_user instance.
-   *
-   * @var rcube_user
-   */
-  public $user;
-
-  /**
-   * Instace of database class.
-   *
-   * @var rcube_mdb2
-   */
-  public $db;
-
-  /**
-   * Instace of Memcache class.
-   *
-   * @var rcube_mdb2
-   */
-  public $memcache;
-
-  /**
-   * Instace of rcube_session class.
-   *
-   * @var rcube_session
-   */
-  public $session;
-
-  /**
-   * Instance of rcube_smtp class.
-   *
-   * @var rcube_smtp
-   */
-  public $smtp;
-
-  /**
-   * Instance of rcube_storage class.
-   *
-   * @var rcube_storage
-   */
-  public $storage;
-
-  /**
-   * Instance of rcube_template class.
-   *
-   * @var rcube_template
-   */
-  public $output;
-
-  /**
-   * Instance of rcube_plugin_api.
-   *
-   * @var rcube_plugin_api
-   */
-  public $plugins;
-
-  /**
-   * Current task.
-   *
-   * @var string
-   */
-  public $task;
-
-  /**
-   * Current action.
-   *
-   * @var string
-   */
-  public $action = '';
-  public $comm_path = './';
-
-  private $texts;
-  private $address_books = array();
-  private $caches = array();
-  private $action_map = array();
-  private $shutdown_functions = array();
-  private $expunge_cache = false;
+    private $address_books = array();
+    private $action_map    = array();
 
 
-  /**
-   * This implements the 'singleton' design pattern
-   *
-   * @return rcmail The one and only instance
-   */
-  static function get_instance()
-  {
-    if (!self::$instance) {
-      self::$instance = new rcmail();
-      self::$instance->startup();  // init AFTER object was linked with self::$instance
+    const ERROR_STORAGE          = -2;
+    const ERROR_INVALID_REQUEST  = 1;
+    const ERROR_INVALID_HOST     = 2;
+    const ERROR_COOKIES_DISABLED = 3;
+
+
+    /**
+     * This implements the 'singleton' design pattern
+     *
+     * @param string Environment name to run (e.g. live, dev, test)
+     *
+     * @return rcmail The one and only instance
+     */
+    static function get_instance($env = '')
+    {
+        if (!self::$instance || !is_a(self::$instance, 'rcmail')) {
+            self::$instance = new rcmail($env);
+            // init AFTER object was linked with self::$instance
+            self::$instance->startup();
+        }
+
+        return self::$instance;
     }
 
-    return self::$instance;
-  }
+    /**
+     * Initial startup function
+     * to register session, create database and imap connections
+     */
+    protected function startup()
+    {
+        $this->init(self::INIT_WITH_DB | self::INIT_WITH_PLUGINS);
 
+        // set filename if not index.php
+        if (($basename = basename($_SERVER['SCRIPT_FILENAME'])) && $basename != 'index.php') {
+            $this->filename = $basename;
+        }
 
-  /**
-   * Private constructor
-   */
-  private function __construct()
-  {
-    // load configuration
-    $this->config = new rcube_config();
+        // start session
+        $this->session_init();
 
-    register_shutdown_function(array($this, 'shutdown'));
-  }
+        // create user object
+        $this->set_user(new rcube_user($_SESSION['user_id']));
 
+        // set task and action properties
+        $this->set_task(rcube_utils::get_input_value('_task', rcube_utils::INPUT_GPC));
+        $this->action = asciiwords(rcube_utils::get_input_value('_action', rcube_utils::INPUT_GPC));
 
-  /**
-   * Initial startup function
-   * to register session, create database and imap connections
-   */
-  private function startup()
-  {
-    // initialize syslog
-    if ($this->config->get('log_driver') == 'syslog') {
-      $syslog_id = $this->config->get('syslog_id', 'roundcube');
-      $syslog_facility = $this->config->get('syslog_facility', LOG_USER);
-      openlog($syslog_id, LOG_ODELAY, $syslog_facility);
+        // reset some session parameters when changing task
+        if ($this->task != 'utils') {
+            // we reset list page when switching to another task
+            // but only to the main task interface - empty action (#1489076)
+            // this will prevent from unintentional page reset on cross-task requests
+            if ($this->session && $_SESSION['task'] != $this->task && empty($this->action)) {
+                $this->session->remove('page');
+            }
+
+            // set current task to session
+            $_SESSION['task'] = $this->task;
+        }
+
+        // init output class
+        if (!empty($_REQUEST['_remote']))
+            $GLOBALS['OUTPUT'] = $this->json_init();
+        else
+            $GLOBALS['OUTPUT'] = $this->load_gui(!empty($_REQUEST['_framed']));
+
+        // load plugins
+        $this->plugins->init($this, $this->task);
+        $this->plugins->load_plugins((array)$this->config->get('plugins', array()),
+            array('filesystem_attachments', 'jqueryui'));
     }
 
-    // connect to database
-    $this->get_dbh();
+    /**
+     * Setter for application task
+     *
+     * @param string Task to set
+     */
+    public function set_task($task)
+    {
+        $task = asciiwords($task, true);
 
-    // start session
-    $this->session_init();
+        if ($this->user && $this->user->ID)
+            $task = !$task ? 'mail' : $task;
+        else if (php_sapi_name() == 'cli')
+            $task = 'cli';
+        else
+            $task = 'login';
 
-    // create user object
-    $this->set_user(new rcube_user($_SESSION['user_id']));
+        $this->task      = $task;
+        $this->comm_path = $this->url(array('task' => $this->task));
 
-    // configure session (after user config merge!)
-    $this->session_configure();
-
-    // set task and action properties
-    $this->set_task(get_input_value('_task', RCUBE_INPUT_GPC));
-    $this->action = asciiwords(get_input_value('_action', RCUBE_INPUT_GPC));
-
-    // reset some session parameters when changing task
-    if ($this->task != 'utils') {
-      if ($this->session && $_SESSION['task'] != $this->task)
-        $this->session->remove('page');
-      // set current task to session
-      $_SESSION['task'] = $this->task;
+        if ($this->output) {
+            $this->output->set_env('task', $this->task);
+        }
     }
 
-    // init output class
-    if (!empty($_REQUEST['_remote']))
-      $GLOBALS['OUTPUT'] = $this->json_init();
-    else
-      $GLOBALS['OUTPUT'] = $this->load_gui(!empty($_REQUEST['_framed']));
+    /**
+     * Setter for system user object
+     *
+     * @param rcube_user Current user instance
+     */
+    public function set_user($user)
+    {
+        parent::set_user($user);
 
-    // create plugin API and load plugins
-    $this->plugins = rcube_plugin_api::get_instance();
+        $lang = $this->language_prop($this->config->get('language', $_SESSION['language']));
+        $_SESSION['language'] = $this->user->language = $lang;
 
-    // init plugins
-    $this->plugins->init();
-  }
+        // set localization
+        setlocale(LC_ALL, $lang . '.utf8', $lang . '.UTF-8', 'en_US.utf8', 'en_US.UTF-8');
 
-
-  /**
-   * Setter for application task
-   *
-   * @param string Task to set
-   */
-  public function set_task($task)
-  {
-    $task = asciiwords($task);
-
-    if ($this->user && $this->user->ID)
-      $task = !$task ? 'mail' : $task;
-    else
-      $task = 'login';
-
-    $this->task = $task;
-    $this->comm_path = $this->url(array('task' => $this->task));
-
-    if ($this->output)
-      $this->output->set_env('task', $this->task);
-  }
-
-
-  /**
-   * Setter for system user object
-   *
-   * @param rcube_user Current user instance
-   */
-  public function set_user($user)
-  {
-    if (is_object($user)) {
-      $this->user = $user;
-
-      // overwrite config with user preferences
-      $this->config->set_user_prefs((array)$this->user->get_prefs());
+        // workaround for http://bugs.php.net/bug.php?id=18556
+        if (version_compare(PHP_VERSION, '5.5.0', '<') && in_array($lang, array('tr_TR', 'ku', 'az_AZ'))) {
+            setlocale(LC_CTYPE, 'en_US.utf8', 'en_US.UTF-8');
+        }
     }
 
-    $_SESSION['language'] = $this->user->language = $this->language_prop($this->config->get('language', $_SESSION['language']));
+    /**
+     * Return instance of the internal address book class
+     *
+     * @param string  Address book identifier (-1 for default addressbook)
+     * @param boolean True if the address book needs to be writeable
+     *
+     * @return rcube_contacts Address book object
+     */
+    public function get_address_book($id, $writeable = false)
+    {
+        $contacts    = null;
+        $ldap_config = (array)$this->config->get('ldap_public');
 
-    // set localization
-    setlocale(LC_ALL, $_SESSION['language'] . '.utf8', 'en_US.utf8');
+        // 'sql' is the alias for '0' used by autocomplete
+        if ($id == 'sql')
+            $id = '0';
+        else if ($id == -1) {
+            $id = $this->config->get('default_addressbook');
+            $default = true;
+        }
 
-    // workaround for http://bugs.php.net/bug.php?id=18556
-    if (in_array($_SESSION['language'], array('tr_TR', 'ku', 'az_AZ')))
-      setlocale(LC_CTYPE, 'en_US' . '.utf8');
-  }
+        // use existing instance
+        if (isset($this->address_books[$id]) && ($this->address_books[$id] instanceof rcube_addressbook)) {
+            $contacts = $this->address_books[$id];
+        }
+        else if ($id && $ldap_config[$id]) {
+            $domain   = $this->config->mail_domain($_SESSION['storage_host']);
+            $contacts = new rcube_ldap($ldap_config[$id], $this->config->get('ldap_debug'), $domain);
+        }
+        else if ($id === '0') {
+            $contacts = new rcube_contacts($this->db, $this->get_user_id());
+        }
+        else {
+            $plugin = $this->plugins->exec_hook('addressbook_get', array('id' => $id, 'writeable' => $writeable));
 
+            // plugin returned instance of a rcube_addressbook
+            if ($plugin['instance'] instanceof rcube_addressbook) {
+                $contacts = $plugin['instance'];
+            }
+        }
 
-  /**
-   * Check the given string and return a valid language code
-   *
-   * @param string Language code
-   * @return string Valid language code
-   */
-  private function language_prop($lang)
-  {
-    static $rcube_languages, $rcube_language_aliases;
+        // when user requested default writeable addressbook
+        // we need to check if default is writeable, if not we
+        // will return first writeable book (if any exist)
+        if ($contacts && $default && $contacts->readonly && $writeable) {
+            $contacts = null;
+        }
 
-    // user HTTP_ACCEPT_LANGUAGE if no language is specified
-    if (empty($lang) || $lang == 'auto') {
-       $accept_langs = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
-       $lang = str_replace('-', '_', $accept_langs[0]);
-     }
+        // Get first addressbook from the list if configured default doesn't exist
+        // This can happen when user deleted the addressbook (e.g. Kolab folder)
+        if (!$contacts && (!$id || $default)) {
+            $source = reset($this->get_address_sources($writeable, !$default));
+            if (!empty($source)) {
+                $contacts = $this->get_address_book($source['id']);
+                if ($contacts) {
+                    $id = $source['id'];
+                }
+            }
+        }
 
-    if (empty($rcube_languages)) {
-      @include(INSTALL_PATH . 'program/localization/index.inc');
+        if (!$contacts) {
+            // there's no default, just return
+            if ($default) {
+                return null;
+            }
+
+            self::raise_error(array(
+                    'code'    => 700,
+                    'file'    => __FILE__,
+                    'line'    => __LINE__,
+                    'message' => "Addressbook source ($id) not found!"
+                ),
+                true, true);
+        }
+
+        // add to the 'books' array for shutdown function
+        $this->address_books[$id] = $contacts;
+
+        if ($writeable && $contacts->readonly) {
+            return null;
+        }
+
+        // set configured sort order
+        if ($sort_col = $this->config->get('addressbook_sort_col')) {
+            $contacts->set_sort_order($sort_col);
+        }
+
+        return $contacts;
     }
 
-    // check if we have an alias for that language
-    if (!isset($rcube_languages[$lang]) && isset($rcube_language_aliases[$lang])) {
-      $lang = $rcube_language_aliases[$lang];
-    }
-    // try the first two chars
-    else if (!isset($rcube_languages[$lang])) {
-      $short = substr($lang, 0, 2);
-
-      // check if we have an alias for the short language code
-      if (!isset($rcube_languages[$short]) && isset($rcube_language_aliases[$short])) {
-        $lang = $rcube_language_aliases[$short];
-      }
-      // expand 'nn' to 'nn_NN'
-      else if (!isset($rcube_languages[$short])) {
-        $lang = $short.'_'.strtoupper($short);
-      }
+    /**
+     * Return identifier of the address book object
+     *
+     * @param rcube_addressbook Addressbook source object
+     *
+     * @return string Source identifier
+     */
+    public function get_address_book_id($object)
+    {
+        foreach ($this->address_books as $index => $book) {
+            if ($book === $object) {
+                return $index;
+            }
+        }
     }
 
-    if (!isset($rcube_languages[$lang]) || !is_dir(INSTALL_PATH . 'program/localization/' . $lang)) {
-      $lang = 'en_US';
+    /**
+     * Return address books list
+     *
+     * @param boolean True if the address book needs to be writeable
+     * @param boolean True if the address book needs to be not hidden
+     *
+     * @return array  Address books array
+     */
+    public function get_address_sources($writeable = false, $skip_hidden = false)
+    {
+        $abook_type   = (string) $this->config->get('address_book_type');
+        $ldap_config  = (array) $this->config->get('ldap_public');
+        $autocomplete = (array) $this->config->get('autocomplete_addressbooks');
+        $list         = array();
+
+        // We are using the DB address book or a plugin address book
+        if (!empty($abook_type) && strtolower($abook_type) != 'ldap') {
+            if (!isset($this->address_books['0'])) {
+                $this->address_books['0'] = new rcube_contacts($this->db, $this->get_user_id());
+            }
+
+            $list['0'] = array(
+                'id'       => '0',
+                'name'     => $this->gettext('personaladrbook'),
+                'groups'   => $this->address_books['0']->groups,
+                'readonly' => $this->address_books['0']->readonly,
+                'undelete' => $this->address_books['0']->undelete && $this->config->get('undo_timeout'),
+                'autocomplete' => in_array('sql', $autocomplete),
+            );
+        }
+
+        if (!empty($ldap_config)) {
+            foreach ($ldap_config as $id => $prop) {
+                // handle misconfiguration
+                if (empty($prop) || !is_array($prop)) {
+                    continue;
+                }
+
+                $list[$id] = array(
+                    'id'       => $id,
+                    'name'     => html::quote($prop['name']),
+                    'groups'   => !empty($prop['groups']) || !empty($prop['group_filters']),
+                    'readonly' => !$prop['writable'],
+                    'hidden'   => $prop['hidden'],
+                    'autocomplete' => in_array($id, $autocomplete)
+                );
+            }
+        }
+
+        $plugin = $this->plugins->exec_hook('addressbooks_list', array('sources' => $list));
+        $list   = $plugin['sources'];
+
+        foreach ($list as $idx => $item) {
+            // register source for shutdown function
+            if (!is_object($this->address_books[$item['id']])) {
+                $this->address_books[$item['id']] = $item;
+            }
+            // remove from list if not writeable as requested
+            if ($writeable && $item['readonly']) {
+                unset($list[$idx]);
+            }
+            // remove from list if hidden as requested
+            else if ($skip_hidden && $item['hidden']) {
+                unset($list[$idx]);
+            }
+        }
+
+        return $list;
     }
 
-    return $lang;
-  }
+    /**
+     * Getter for compose responses.
+     * These are stored in local config and user preferences.
+     *
+     * @param boolean True to sort the list alphabetically
+     * @param boolean True if only this user's responses shall be listed
+     *
+     * @return array List of the current user's stored responses
+     */
+    public function get_compose_responses($sorted = false, $user_only = false)
+    {
+        $responses = array();
 
+        if (!$user_only) {
+            foreach ($this->config->get('compose_responses_static', array()) as $response) {
+                if (empty($response['key'])) {
+                    $response['key']    = substr(md5($response['name']), 0, 16);
+                }
 
-  /**
-   * Get the current database connection
-   *
-   * @return rcube_mdb2  Database connection object
-   */
-  public function get_dbh()
-  {
-    if (!$this->db) {
-      $config_all = $this->config->all();
+                $response['static'] = true;
+                $response['class']  = 'readonly';
 
-      $this->db = new rcube_mdb2($config_all['db_dsnw'], $config_all['db_dsnr'], $config_all['db_persistent']);
-      $this->db->sqlite_initials = INSTALL_PATH . 'SQL/sqlite.initial.sql';
-      $this->db->set_debug((bool)$config_all['sql_debug']);
+                $k = $sorted ? '0000-' . strtolower($response['name']) : $response['key'];
+                $responses[$k] = $response;
+            }
+        }
+
+        foreach ($this->config->get('compose_responses', array()) as $response) {
+            if (empty($response['key'])) {
+                $response['key'] = substr(md5($response['name']), 0, 16);
+            }
+
+            $k = $sorted ? strtolower($response['name']) : $response['key'];
+            $responses[$k] = $response;
+        }
+
+        // sort list by name
+        if ($sorted) {
+            ksort($responses, SORT_LOCALE_STRING);
+        }
+
+        return array_values($responses);
     }
 
-    return $this->db;
-  }
+    /**
+     * Init output object for GUI and add common scripts.
+     * This will instantiate a rcmail_output_html object and set
+     * environment vars according to the current session and configuration
+     *
+     * @param boolean True if this request is loaded in a (i)frame
+     *
+     * @return rcube_output Reference to HTML output object
+     */
+    public function load_gui($framed = false)
+    {
+        // init output page
+        if (!($this->output instanceof rcmail_output_html)) {
+            $this->output = new rcmail_output_html($this->task, $framed);
+        }
 
+        // set refresh interval
+        $this->output->set_env('refresh_interval', $this->config->get('refresh_interval', 0));
+        $this->output->set_env('session_lifetime', $this->config->get('session_lifetime', 0) * 60);
 
-  /**
-   * Get global handle for memcache access
-   *
-   * @return object Memcache
-   */
-  public function get_memcache()
-  {
-    if (!isset($this->memcache)) {
-      // no memcache support in PHP
-      if (!class_exists('Memcache')) {
-        $this->memcache = false;
+        if ($framed) {
+            $this->comm_path .= '&_framed=1';
+            $this->output->set_env('framed', true);
+        }
+
+        $this->output->set_env('task', $this->task);
+        $this->output->set_env('action', $this->action);
+        $this->output->set_env('comm_path', $this->comm_path);
+        $this->output->set_charset(RCUBE_CHARSET);
+
+        if ($this->user && $this->user->ID) {
+            $this->output->set_env('user_id', $this->user->get_hash());
+        }
+
+        // add some basic labels to client
+        $this->output->add_label('loading', 'servererror', 'connerror', 'requesttimedout', 'refreshing');
+
+        return $this->output;
+    }
+
+    /**
+     * Create an output object for JSON responses
+     *
+     * @return rcube_output Reference to JSON output object
+     */
+    public function json_init()
+    {
+        if (!($this->output instanceof rcmail_output_json)) {
+            $this->output = new rcmail_output_json($this->task);
+        }
+
+        return $this->output;
+    }
+
+    /**
+     * Create session object and start the session.
+     */
+    public function session_init()
+    {
+        parent::session_init();
+
+        // set initial session vars
+        if (!$_SESSION['user_id']) {
+            $_SESSION['temp'] = true;
+        }
+
+        // restore skin selection after logout
+        if ($_SESSION['temp'] && !empty($_SESSION['skin'])) {
+            $this->config->set('skin', $_SESSION['skin']);
+        }
+    }
+
+    /**
+     * Perfom login to the mail server and to the webmail service.
+     * This will also create a new user entry if auto_create_user is configured.
+     *
+     * @param string Mail storage (IMAP) user name
+     * @param string Mail storage (IMAP) password
+     * @param string Mail storage (IMAP) host
+     * @param bool   Enables cookie check
+     *
+     * @return boolean True on success, False on failure
+     */
+    function login($username, $pass, $host = null, $cookiecheck = false)
+    {
+        $this->login_error = null;
+
+        if (empty($username)) {
+            return false;
+        }
+
+        if ($cookiecheck && empty($_COOKIE)) {
+            $this->login_error = self::ERROR_COOKIES_DISABLED;
+            return false;
+        }
+
+        $default_host    = $this->config->get('default_host');
+        $default_port    = $this->config->get('default_port');
+        $username_domain = $this->config->get('username_domain');
+        $login_lc        = $this->config->get('login_lc', 2);
+
+        if (!$host) {
+            $host = $default_host;
+        }
+
+        // Validate that selected host is in the list of configured hosts
+        if (is_array($default_host)) {
+            $allowed = false;
+
+            foreach ($default_host as $key => $host_allowed) {
+                if (!is_numeric($key)) {
+                    $host_allowed = $key;
+                }
+                if ($host == $host_allowed) {
+                    $allowed = true;
+                    break;
+                }
+            }
+
+            if (!$allowed) {
+                $host = null;
+            }
+        }
+        else if (!empty($default_host) && $host != rcube_utils::parse_host($default_host)) {
+            $host = null;
+        }
+
+        if (!$host) {
+            $this->login_error = self::ERROR_INVALID_HOST;
+            return false;
+        }
+
+        // parse $host URL
+        $a_host = parse_url($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 = $default_port;
+        }
+
+        // Check if we need to add/force domain to username
+        if (!empty($username_domain)) {
+            $domain = is_array($username_domain) ? $username_domain[$host] : $username_domain;
+
+            if ($domain = rcube_utils::parse_host((string)$domain, $host)) {
+                $pos = strpos($username, '@');
+
+                // force configured domains
+                if ($pos !== false && $this->config->get('username_domain_forced')) {
+                    $username = substr($username, 0, $pos) . '@' . $domain;
+                }
+                // just add domain if not specified
+                else if ($pos === false) {
+                    $username .= '@' . $domain;
+                }
+            }
+        }
+
+        // Convert username to lowercase. If storage backend
+        // is case-insensitive we need to store always the same username (#1487113)
+        if ($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);
+            }
+        }
+
+        // try to resolve email address from virtuser table
+        if (strpos($username, '@') && ($virtuser = rcube_user::email2user($username))) {
+            $username = $virtuser;
+        }
+
+        // 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 -> overwrite username
+        if ($user = rcube_user::query($username, $host)) {
+            $username = $user->data['username'];
+        }
+
+        $storage = $this->get_storage();
+
+        // try to log in
+        if (!$storage->connect($host, $username, $pass, $port, $ssl)) {
+            return false;
+        }
+
+        // user already registered -> update user's record
+        if (is_object($user)) {
+            // update last login timestamp
+            $user->touch();
+        }
+        // create new system user
+        else if ($this->config->get('auto_create_user')) {
+            if ($created = rcube_user::create($username, $host)) {
+                $user = $created;
+            }
+            else {
+                self::raise_error(array(
+                        'code'    => 620,
+                        'file'    => __FILE__,
+                        'line'    => __LINE__,
+                        'message' => "Failed to create a user record. Maybe aborted by a plugin?"
+                    ),
+                    true, false);
+            }
+        }
+        else {
+            self::raise_error(array(
+                    'code'    => 621,
+                    'file'    => __FILE__,
+                    'line'    => __LINE__,
+                    'message' => "Access denied for new user $username. 'auto_create_user' is disabled"
+                ),
+                true, false);
+        }
+
+        // login succeeded
+        if (is_object($user) && $user->ID) {
+            // Configure environment
+            $this->set_user($user);
+            $this->set_storage_prop();
+
+            // 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']     = $this->encrypt($pass);
+            $_SESSION['login_time']   = time();
+
+            if (isset($_REQUEST['_timezone']) && $_REQUEST['_timezone'] != '_default_') {
+                $_SESSION['timezone'] = rcube_utils::get_input_value('_timezone', rcube_utils::INPUT_GPC);
+            }
+
+            // fix some old settings according to namespace prefix
+            $this->fix_namespace_settings($user);
+
+            // set/create special folders
+            $this->set_special_folders();
+
+            // clear all mailboxes related cache(s)
+            $storage->clear_cache('mailboxes', true);
+
+            return true;
+        }
+
         return false;
-      }
-
-      $this->memcache = new Memcache;
-      $this->mc_available = 0;
-      
-      // add alll configured hosts to pool
-      $pconnect = $this->config->get('memcache_pconnect', true);
-      foreach ($this->config->get('memcache_hosts', array()) as $host) {
-        list($host, $port) = explode(':', $host);
-        if (!$port) $port = 11211;
-        $this->mc_available += intval($this->memcache->addServer($host, $port, $pconnect, 1, 1, 15, false, array($this, 'memcache_failure')));
-      }
-      
-      // test connection and failover (will result in $this->mc_available == 0 on complete failure)
-      $this->memcache->increment('__CONNECTIONTEST__', 1);  // NOP if key doesn't exist
-
-      if (!$this->mc_available)
-        $this->memcache = false;
     }
 
-    return $this->memcache;
-  }
-  
-  /**
-   * Callback for memcache failure
-   */
-  public function memcache_failure($host, $port)
-  {
-    static $seen = array();
-    
-    // only report once
-    if (!$seen["$host:$port"]++) {
-      $this->mc_available--;
-      raise_error(array('code' => 604, 'type' => 'db',
-        'line' => __LINE__, 'file' => __FILE__,
-        'message' => "Memcache failure on host $host:$port"),
-        true, false);
-    }
-  }
-
-
-  /**
-   * Initialize and get cache object
-   *
-   * @param string $name   Cache identifier
-   * @param string $type   Cache type ('db', 'apc' or 'memcache')
-   * @param int    $ttl    Expiration time for cache items in seconds
-   * @param bool   $packed Enables/disables data serialization
-   *
-   * @return rcube_cache Cache object
-   */
-  public function get_cache($name, $type='db', $ttl=0, $packed=true)
-  {
-    if (!isset($this->caches[$name])) {
-      $this->caches[$name] = new rcube_cache($type, $_SESSION['user_id'], $name, $ttl, $packed);
-    }
-
-    return $this->caches[$name];
-  }
-
-
-  /**
-   * Return instance of the internal address book class
-   *
-   * @param string  Address book identifier
-   * @param boolean True if the address book needs to be writeable
-   *
-   * @return rcube_contacts Address book object
-   */
-  public function get_address_book($id, $writeable = false)
-  {
-    $contacts    = null;
-    $ldap_config = (array)$this->config->get('ldap_public');
-    $abook_type  = strtolower($this->config->get('address_book_type'));
-
-    // 'sql' is the alias for '0' used by autocomplete
-    if ($id == 'sql')
-        $id = '0';
-
-    // use existing instance
-    if (isset($this->address_books[$id]) && is_object($this->address_books[$id])
-      && is_a($this->address_books[$id], 'rcube_addressbook')
-      && (!$writeable || !$this->address_books[$id]->readonly)
-    ) {
-      $contacts = $this->address_books[$id];
-    }
-    else if ($id && $ldap_config[$id]) {
-      $contacts = new rcube_ldap($ldap_config[$id], $this->config->get('ldap_debug'), $this->config->mail_domain($_SESSION['storage_host']));
-    }
-    else if ($id === '0') {
-      $contacts = new rcube_contacts($this->db, $this->user->ID);
-    }
-    else {
-      $plugin = $this->plugins->exec_hook('addressbook_get', array('id' => $id, 'writeable' => $writeable));
-
-      // plugin returned instance of a rcube_addressbook
-      if ($plugin['instance'] instanceof rcube_addressbook) {
-        $contacts = $plugin['instance'];
-      }
-      // get first source from the list
-      else if (!$id) {
-        $source = reset($this->get_address_sources($writeable));
-        if (!empty($source)) {
-          $contacts = $this->get_address_book($source['id']);
-          if ($contacts)
-            $id = $source['id'];
+    /**
+     * Returns error code of last login operation
+     *
+     * @return int Error code
+     */
+    public function login_error()
+    {
+        if ($this->login_error) {
+            return $this->login_error;
         }
-      }
-    }
 
-    if (!$contacts) {
-      raise_error(array(
-        'code' => 700, 'type' => 'php',
-        'file' => __FILE__, 'line' => __LINE__,
-        'message' => "Addressbook source ($id) not found!"),
-        true, true);
-    }
-
-    // set configured sort order
-    if ($sort_col = $this->config->get('addressbook_sort_col'))
-        $contacts->set_sort_order($sort_col);
-
-    // add to the 'books' array for shutdown function
-    $this->address_books[$id] = $contacts;
-
-    return $contacts;
-  }
-
-
-  /**
-   * Return address books list
-   *
-   * @param boolean True if the address book needs to be writeable
-   *
-   * @return array  Address books array
-   */
-  public function get_address_sources($writeable = false)
-  {
-    $abook_type = strtolower($this->config->get('address_book_type'));
-    $ldap_config = $this->config->get('ldap_public');
-    $autocomplete = (array) $this->config->get('autocomplete_addressbooks');
-    $list = array();
-
-    // We are using the DB address book
-    if ($abook_type != 'ldap') {
-      if (!isset($this->address_books['0']))
-        $this->address_books['0'] = new rcube_contacts($this->db, $this->user->ID);
-      $list['0'] = array(
-        'id'       => '0',
-        'name'     => rcube_label('personaladrbook'),
-        'groups'   => $this->address_books['0']->groups,
-        'readonly' => $this->address_books['0']->readonly,
-        'autocomplete' => in_array('sql', $autocomplete),
-        'undelete' => $this->address_books['0']->undelete && $this->config->get('undo_timeout'),
-      );
-    }
-
-    if ($ldap_config) {
-      $ldap_config = (array) $ldap_config;
-      foreach ($ldap_config as $id => $prop) {
-        // handle misconfiguration
-        if (empty($prop) || !is_array($prop)) {
-          continue;
+        if ($this->storage && $this->storage->get_error_code() < -1) {
+            return self::ERROR_STORAGE;
         }
-        $list[$id] = array(
-          'id'       => $id,
-          'name'     => $prop['name'],
-          'groups'   => is_array($prop['groups']),
-          'readonly' => !$prop['writable'],
-          'hidden'   => $prop['hidden'],
-          'autocomplete' => in_array($id, $autocomplete)
-        );
-      }
     }
 
-    $plugin = $this->plugins->exec_hook('addressbooks_list', array('sources' => $list));
-    $list = $plugin['sources'];
+    /**
+     * Auto-select IMAP host based on the posted login information
+     *
+     * @return string Selected IMAP host
+     */
+    public function autoselect_host()
+    {
+        $default_host = $this->config->get('default_host');
+        $host         = null;
 
-    foreach ($list as $idx => $item) {
-      // register source for shutdown function
-      if (!is_object($this->address_books[$item['id']]))
-        $this->address_books[$item['id']] = $item;
-      // remove from list if not writeable as requested
-      if ($writeable && $item['readonly'])
-          unset($list[$idx]);
+        if (is_array($default_host)) {
+            $post_host = rcube_utils::get_input_value('_host', rcube_utils::INPUT_POST);
+            $post_user = rcube_utils::get_input_value('_user', rcube_utils::INPUT_POST);
+
+            list(, $domain) = explode('@', $post_user);
+
+            // direct match in default_host array
+            if ($default_host[$post_host] || in_array($post_host, array_values($default_host))) {
+                $host = $post_host;
+            }
+            // try to select host by mail domain
+            else if (!empty($domain)) {
+                foreach ($default_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 $host is still not set
+            if (empty($host)) {
+                list($key, $val) = each($default_host);
+                $host = is_numeric($key) ? $val : $key;
+            }
+        }
+        else if (empty($default_host)) {
+            $host = rcube_utils::get_input_value('_host', rcube_utils::INPUT_POST);
+        }
+        else {
+            $host = rcube_utils::parse_host($default_host);
+        }
+
+        return $host;
     }
 
-    return $list;
-  }
+    /**
+     * Destroy session data and remove cookie
+     */
+    public function kill_session()
+    {
+        $this->plugins->exec_hook('session_destroy');
 
-
-  /**
-   * Init output object for GUI and add common scripts.
-   * This will instantiate a rcmail_template object and set
-   * environment vars according to the current session and configuration
-   *
-   * @param boolean True if this request is loaded in a (i)frame
-   * @return rcube_template Reference to HTML output object
-   */
-  public function load_gui($framed = false)
-  {
-    // init output page
-    if (!($this->output instanceof rcube_template))
-      $this->output = new rcube_template($this->task, $framed);
-
-    // set keep-alive/check-recent interval
-    if ($this->session && ($keep_alive = $this->session->get_keep_alive())) {
-      $this->output->set_env('keep_alive', $keep_alive);
+        $this->session->kill();
+        $_SESSION = array('language' => $this->user->language, 'temp' => true, 'skin' => $this->config->get('skin'));
+        $this->user->reset();
     }
 
-    if ($framed) {
-      $this->comm_path .= '&_framed=1';
-      $this->output->set_env('framed', true);
+    /**
+     * Do server side actions on logout
+     */
+    public function logout_actions()
+    {
+        $config  = $this->config->all();
+        $storage = $this->get_storage();
+
+        if ($config['logout_purge'] && !empty($config['trash_mbox'])) {
+            $storage->clear_folder($config['trash_mbox']);
+        }
+
+        if ($config['logout_expunge']) {
+            $storage->expunge_folder('INBOX');
+        }
+
+        // Try to save unsaved user preferences
+        if (!empty($_SESSION['preferences'])) {
+            $this->user->save_prefs(unserialize($_SESSION['preferences']));
+        }
     }
 
-    $this->output->set_env('task', $this->task);
-    $this->output->set_env('action', $this->action);
-    $this->output->set_env('comm_path', $this->comm_path);
-    $this->output->set_charset(RCMAIL_CHARSET);
+    /**
+     * Generate a unique token to be used in a form request
+     *
+     * @return string The request token
+     */
+    public function get_request_token()
+    {
+        $sess_id = $_COOKIE[ini_get('session.name')];
 
-    // add some basic labels to client
-    $this->output->add_label('loading', 'servererror');
+        if (!$sess_id) {
+            $sess_id = session_id();
+        }
 
-    return $this->output;
-  }
+        $plugin = $this->plugins->exec_hook('request_token', array(
+            'value' => md5('RT' . $this->get_user_id() . $this->config->get('des_key') . $sess_id)));
 
-
-  /**
-   * Create an output object for JSON responses
-   *
-   * @return rcube_json_output Reference to JSON output object
-   */
-  public function json_init()
-  {
-    if (!($this->output instanceof rcube_json_output))
-      $this->output = new rcube_json_output($this->task);
-
-    return $this->output;
-  }
-
-
-  /**
-   * Create SMTP object and connect to server
-   *
-   * @param boolean True if connection should be established
-   */
-  public function smtp_init($connect = false)
-  {
-    $this->smtp = new rcube_smtp();
-
-    if ($connect)
-      $this->smtp->connect();
-  }
-
-
-  /**
-   * Initialize and get storage object
-   *
-   * @return rcube_storage Storage object
-   */
-  public function get_storage()
-  {
-    // already initialized
-    if (!is_object($this->storage)) {
-      $this->storage_init();
+        return $plugin['value'];
     }
 
-    return $this->storage;
-  }
+    /**
+     * Check if the current request contains a valid token
+     *
+     * @param int Request method
+     *
+     * @return boolean True if request token is valid false if not
+     */
+    public function check_request($mode = rcube_utils::INPUT_POST)
+    {
+        $token   = rcube_utils::get_input_value('_token', $mode);
+        $sess_id = $_COOKIE[ini_get('session.name')];
 
-
-  /**
-   * Connect to the IMAP server with stored session data.
-   *
-   * @return bool True on success, False on error
-   * @deprecated
-   */
-  public function imap_connect()
-  {
-    return $this->storage_connect();
-  }
-
-
-  /**
-   * Initialize IMAP object.
-   *
-   * @deprecated
-   */
-  public function imap_init()
-  {
-    $this->storage_init();
-  }
-
-
-  /**
-   * Initialize storage object
-   */
-  public function storage_init()
-  {
-    // already initialized
-    if (is_object($this->storage)) {
-      return;
+        return !empty($sess_id) && $token == $this->get_request_token();
     }
 
-    $driver = $this->config->get('storage_driver', 'imap');
-    $driver_class = "rcube_{$driver}";
+    /**
+     * Build a valid URL to this instance of Roundcube
+     *
+     * @param mixed Either a string with the action or url parameters as key-value pairs
+     *
+     * @return string Valid application URL
+     */
+    public function url($p)
+    {
+        if (!is_array($p)) {
+            if (strpos($p, 'http') === 0) {
+                return $p;
+            }
 
-    if (!class_exists($driver_class)) {
-      raise_error(array(
-        'code' => 700, 'type' => 'php',
-        'file' => __FILE__, 'line' => __LINE__,
-        'message' => "Storage driver class ($driver) not found!"),
-        true, true);
+            $p = array('_action' => @func_get_arg(0));
+        }
+
+        $task = $p['_task'] ? $p['_task'] : ($p['task'] ? $p['task'] : $this->task);
+        $p['_task'] = $task;
+        unset($p['task']);
+
+        $url  = './' . $this->filename;
+        $delm = '?';
+
+        foreach (array_reverse($p) as $key => $val) {
+            if ($val !== '' && $val !== null) {
+                $par  = $key[0] == '_' ? $key : '_'.$key;
+                $url .= $delm.urlencode($par).'='.urlencode($val);
+                $delm = '&';
+            }
+        }
+
+        return $url;
     }
 
-    // Initialize storage object
-    $this->storage = new $driver_class;
+    /**
+     * Function to be executed in script shutdown
+     */
+    public function shutdown()
+    {
+        parent::shutdown();
 
-    // for backward compat. (deprecated, will be removed)
-    $this->imap = $this->storage;
+        foreach ($this->address_books as $book) {
+            if (is_object($book) && is_a($book, 'rcube_addressbook'))
+                $book->close();
+        }
 
-    // enable caching of mail data
-    $storage_cache  = $this->config->get("{$driver}_cache");
-    $messages_cache = $this->config->get('messages_cache');
-    // for backward compatybility
-    if ($storage_cache === null && $messages_cache === null && $this->config->get('enable_caching')) {
-        $storage_cache  = 'db';
-        $messages_cache = true;
+        // write performance stats to logs/console
+        if ($this->config->get('devel_mode')) {
+            // make sure logged numbers use unified format
+            setlocale(LC_NUMERIC, 'en_US.utf8', 'en_US.UTF-8', 'en_US', 'C');
+
+            if (function_exists('memory_get_usage'))
+                $mem = $this->show_bytes(memory_get_usage());
+            if (function_exists('memory_get_peak_usage'))
+                $mem .= '/'.$this->show_bytes(memory_get_peak_usage());
+
+            $log = $this->task . ($this->action ? '/'.$this->action : '') . ($mem ? " [$mem]" : '');
+
+            if (defined('RCMAIL_START'))
+                self::print_timer(RCMAIL_START, $log);
+            else
+                self::console($log);
+        }
     }
 
-    if ($storage_cache)
-        $this->storage->set_caching($storage_cache);
-    if ($messages_cache)
-        $this->storage->set_messages_caching(true);
-
-    // set pagesize from config
-    $pagesize = $this->config->get('mail_pagesize');
-    if (!$pagesize) {
-        $pagesize = $this->config->get('pagesize', 50);
-    }
-    $this->storage->set_pagesize($pagesize);
-
-    // set class options
-    $options = array(
-      'auth_type'   => $this->config->get("{$driver}_auth_type", 'check'),
-      'auth_cid'    => $this->config->get("{$driver}_auth_cid"),
-      'auth_pw'     => $this->config->get("{$driver}_auth_pw"),
-      'debug'       => (bool) $this->config->get("{$driver}_debug"),
-      'force_caps'  => (bool) $this->config->get("{$driver}_force_caps"),
-      'timeout'     => (int) $this->config->get("{$driver}_timeout"),
-      'skip_deleted' => (bool) $this->config->get('skip_deleted'),
-      'driver'      => $driver,
-    );
-
-    if (!empty($_SESSION['storage_host'])) {
-      $options['host']     = $_SESSION['storage_host'];
-      $options['user']     = $_SESSION['username'];
-      $options['port']     = $_SESSION['storage_port'];
-      $options['ssl']      = $_SESSION['storage_ssl'];
-      $options['password'] = $this->decrypt($_SESSION['password']);
-      // set 'imap_host' for backwards compatibility
-      $_SESSION[$driver.'_host'] = &$_SESSION['storage_host'];
+    /**
+     * Registers action aliases for current task
+     *
+     * @param array $map Alias-to-filename hash array
+     */
+    public function register_action_map($map)
+    {
+        if (is_array($map)) {
+            foreach ($map as $idx => $val) {
+                $this->action_map[$idx] = $val;
+            }
+        }
     }
 
-    $options = $this->plugins->exec_hook("storage_init", $options);
+    /**
+     * Returns current action filename
+     *
+     * @param array $map Alias-to-filename hash array
+     */
+    public function get_action_file()
+    {
+        if (!empty($this->action_map[$this->action])) {
+            return $this->action_map[$this->action];
+        }
 
-    $this->storage->set_options($options);
-    $this->set_storage_prop();
-  }
+        return strtr($this->action, '-', '_') . '.inc';
+    }
 
+    /**
+     * Fixes some user preferences according to namespace handling change.
+     * Old Roundcube versions were using folder names with removed namespace prefix.
+     * Now we need to add the prefix on servers where personal namespace has prefix.
+     *
+     * @param rcube_user $user User object
+     */
+    private function fix_namespace_settings($user)
+    {
+        $prefix     = $this->storage->get_namespace('prefix');
+        $prefix_len = strlen($prefix);
 
-  /**
-   * Connect to the mail storage server with stored session data
-   *
-   * @return bool True on success, False on error
-   */
-  public function storage_connect()
-  {
-    $storage = $this->get_storage();
+        if (!$prefix_len)
+            return;
 
-    if ($_SESSION['storage_host'] && !$storage->is_connected()) {
-      $host = $_SESSION['storage_host'];
-      $user = $_SESSION['username'];
-      $port = $_SESSION['storage_port'];
-      $ssl  = $_SESSION['storage_ssl'];
-      $pass = $this->decrypt($_SESSION['password']);
+        $prefs = $this->config->all();
+        if (!empty($prefs['namespace_fixed']))
+            return;
 
-      if (!$storage->connect($host, $user, $pass, $port, $ssl)) {
-        if ($this->output)
-          $this->output->show_message($storage->get_error_code() == -1 ? 'storageerror' : 'sessionerror', 'error');
-      }
-      else {
+        // Build namespace prefix regexp
+        $ns     = $this->storage->get_namespace();
+        $regexp = array();
+
+        foreach ($ns as $entry) {
+            if (!empty($entry)) {
+                foreach ($entry as $item) {
+                    if (strlen($item[0])) {
+                        $regexp[] = preg_quote($item[0], '/');
+                    }
+                }
+            }
+        }
+        $regexp = '/^('. implode('|', $regexp).')/';
+
+        // Fix preferences
+        $opts = array('drafts_mbox', 'junk_mbox', 'sent_mbox', 'trash_mbox', 'archive_mbox');
+        foreach ($opts as $opt) {
+            if ($value = $prefs[$opt]) {
+                if ($value != 'INBOX' && !preg_match($regexp, $value)) {
+                    $prefs[$opt] = $prefix.$value;
+                }
+            }
+        }
+
+        if (!empty($prefs['search_mods'])) {
+            $folders = array();
+            foreach ($prefs['search_mods'] as $idx => $value) {
+                if ($idx != 'INBOX' && $idx != '*' && !preg_match($regexp, $idx)) {
+                    $idx = $prefix.$idx;
+                }
+                $folders[$idx] = $value;
+            }
+
+            $prefs['search_mods'] = $folders;
+        }
+
+        if (!empty($prefs['message_threading'])) {
+            $folders = array();
+            foreach ($prefs['message_threading'] as $idx => $value) {
+                if ($idx != 'INBOX' && !preg_match($regexp, $idx)) {
+                    $idx = $prefix.$idx;
+                }
+                $folders[$prefix.$idx] = $value;
+            }
+
+            $prefs['message_threading'] = $folders;
+        }
+
+        if (!empty($prefs['collapsed_folders'])) {
+            $folders     = explode('&&', $prefs['collapsed_folders']);
+            $count       = count($folders);
+            $folders_str = '';
+
+            if ($count) {
+                $folders[0]        = substr($folders[0], 1);
+                $folders[$count-1] = substr($folders[$count-1], 0, -1);
+            }
+
+            foreach ($folders as $value) {
+                if ($value != 'INBOX' && !preg_match($regexp, $value)) {
+                    $value = $prefix.$value;
+                }
+                $folders_str .= '&'.$value.'&';
+            }
+
+            $prefs['collapsed_folders'] = $folders_str;
+        }
+
+        $prefs['namespace_fixed'] = true;
+
+        // save updated preferences and reset imap settings (default folders)
+        $user->save_prefs($prefs);
         $this->set_storage_prop();
+    }
+
+    /**
+     * Overwrite action variable
+     *
+     * @param string New action value
+     */
+    public function overwrite_action($action)
+    {
+        $this->action = $action;
+        $this->output->set_env('action', $action);
+    }
+
+    /**
+     * Set environment variables for specified config options
+     */
+    public function set_env_config($options)
+    {
+        foreach ((array) $options as $option) {
+            if ($this->config->get($option)) {
+                $this->output->set_env($option, true);
+            }
+        }
+    }
+
+    /**
+     * Returns RFC2822 formatted current date in user's timezone
+     *
+     * @return string Date
+     */
+    public function user_date()
+    {
+        // get user's timezone
+        try {
+            $tz   = new DateTimeZone($this->config->get('timezone'));
+            $date = new DateTime('now', $tz);
+        }
+        catch (Exception $e) {
+            $date = new DateTime();
+        }
+
+        return $date->format('r');
+    }
+
+    /**
+     * Write login data (name, ID, IP address) to the 'userlogins' log file.
+     */
+    public function log_login($user = null, $failed_login = false, $error_code = 0)
+    {
+        if (!$this->config->get('log_logins')) {
+            return;
+        }
+
+        // failed login
+        if ($failed_login) {
+            $message = sprintf('Failed login for %s from %s in session %s (error: %d)',
+                $user, rcube_utils::remote_ip(), session_id(), $error_code);
+        }
+        // successful login
+        else {
+            $user_name = $this->get_user_name();
+            $user_id   = $this->get_user_id();
+
+            if (!$user_id) {
+                return;
+            }
+
+            $message = sprintf('Successful login for %s (ID: %d) from %s in session %s',
+                $user_name, $user_id, rcube_utils::remote_ip(), session_id());
+        }
+
+        // log login
+        self::write_log('userlogins', $message);
+    }
+
+    /**
+     * Create a HTML table based on the given data
+     *
+     * @param  array  Named table attributes
+     * @param  mixed  Table row data. Either a two-dimensional array or a valid SQL result set
+     * @param  array  List of cols to show
+     * @param  string Name of the identifier col
+     *
+     * @return string HTML table code
+     */
+    public function table_output($attrib, $table_data, $a_show_cols, $id_col)
+    {
+        $table = new html_table($attrib);
+
+        // add table header
+        if (!$attrib['noheader']) {
+            foreach ($a_show_cols as $col) {
+                $table->add_header($col, $this->Q($this->gettext($col)));
+            }
+        }
+
+        if (!is_array($table_data)) {
+            $db = $this->get_dbh();
+            while ($table_data && ($sql_arr = $db->fetch_assoc($table_data))) {
+                $table->add_row(array('id' => 'rcmrow' . rcube_utils::html_identifier($sql_arr[$id_col])));
+
+                // format each col
+                foreach ($a_show_cols as $col) {
+                    $table->add($col, $this->Q($sql_arr[$col]));
+                }
+            }
+        }
+        else {
+            foreach ($table_data as $row_data) {
+                $class = !empty($row_data['class']) ? $row_data['class'] : null;
+                if (!empty($attrib['rowclass']))
+                    $class = trim($class . ' ' . $attrib['rowclass']);
+                $rowid = 'rcmrow' . rcube_utils::html_identifier($row_data[$id_col]);
+
+                $table->add_row(array('id' => $rowid, 'class' => $class));
+
+                // format each col
+                foreach ($a_show_cols as $col) {
+                    $val = is_array($row_data[$col]) ? $row_data[$col][0] : $row_data[$col];
+                    $table->add($col, empty($attrib['ishtml']) ? $this->Q($val) : $val);
+                }
+            }
+        }
+
+        return $table->show($attrib);
+    }
+
+    /**
+     * Convert the given date to a human readable form
+     * This uses the date formatting properties from config
+     *
+     * @param mixed  Date representation (string, timestamp or DateTime object)
+     * @param string Date format to use
+     * @param bool   Enables date convertion according to user timezone
+     *
+     * @return string Formatted date string
+     */
+    public function format_date($date, $format = null, $convert = true)
+    {
+        if (is_object($date) && is_a($date, 'DateTime')) {
+            $timestamp = $date->format('U');
+        }
+        else {
+            if (!empty($date)) {
+                $timestamp = rcube_utils::strtotime($date);
+            }
+
+            if (empty($timestamp)) {
+                return '';
+            }
+
+            try {
+                $date = new DateTime("@".$timestamp);
+            }
+            catch (Exception $e) {
+                return '';
+            }
+        }
+
+        if ($convert) {
+            try {
+                // convert to the right timezone
+                $stz = date_default_timezone_get();
+                $tz = new DateTimeZone($this->config->get('timezone'));
+                $date->setTimezone($tz);
+                date_default_timezone_set($tz->getName());
+
+                $timestamp = $date->format('U');
+            }
+            catch (Exception $e) {
+            }
+        }
+
+        // define date format depending on current time
+        if (!$format) {
+            $now         = time();
+            $now_date    = getdate($now);
+            $today_limit = mktime(0, 0, 0, $now_date['mon'], $now_date['mday'], $now_date['year']);
+            $week_limit  = mktime(0, 0, 0, $now_date['mon'], $now_date['mday']-6, $now_date['year']);
+            $pretty_date = $this->config->get('prettydate');
+
+            if ($pretty_date && $timestamp > $today_limit && $timestamp <= $now) {
+                $format = $this->config->get('date_today', $this->config->get('time_format', 'H:i'));
+                $today  = true;
+            }
+            else if ($pretty_date && $timestamp > $week_limit && $timestamp <= $now) {
+                $format = $this->config->get('date_short', 'D H:i');
+            }
+            else {
+                $format = $this->config->get('date_long', 'Y-m-d H:i');
+            }
+        }
+
+        // strftime() format
+        if (preg_match('/%[a-z]+/i', $format)) {
+            $format = strftime($format, $timestamp);
+            if ($stz) {
+                date_default_timezone_set($stz);
+            }
+            return $today ? ($this->gettext('today') . ' ' . $format) : $format;
+        }
+
+        // parse format string manually in order to provide localized weekday and month names
+        // an alternative would be to convert the date() format string to fit with strftime()
+        $out = '';
+        for ($i=0; $i<strlen($format); $i++) {
+            if ($format[$i] == "\\") {  // skip escape chars
+                continue;
+            }
+
+            // write char "as-is"
+            if ($format[$i] == ' ' || $format[$i-1] == "\\") {
+                $out .= $format[$i];
+            }
+            // weekday (short)
+            else if ($format[$i] == 'D') {
+                $out .= $this->gettext(strtolower(date('D', $timestamp)));
+            }
+            // weekday long
+            else if ($format[$i] == 'l') {
+                $out .= $this->gettext(strtolower(date('l', $timestamp)));
+            }
+            // month name (short)
+            else if ($format[$i] == 'M') {
+                $out .= $this->gettext(strtolower(date('M', $timestamp)));
+            }
+            // month name (long)
+            else if ($format[$i] == 'F') {
+                $out .= $this->gettext('long'.strtolower(date('M', $timestamp)));
+            }
+            else if ($format[$i] == 'x') {
+                $out .= strftime('%x %X', $timestamp);
+            }
+            else {
+                $out .= date($format[$i], $timestamp);
+            }
+        }
+
+        if ($today) {
+            $label = $this->gettext('today');
+            // replcae $ character with "Today" label (#1486120)
+            if (strpos($out, '$') !== false) {
+                $out = preg_replace('/\$/', $label, $out, 1);
+            }
+            else {
+                $out = $label . ' ' . $out;
+            }
+        }
+
+        if ($stz) {
+            date_default_timezone_set($stz);
+        }
+
+        return $out;
+    }
+
+    /**
+     * Return folders list in HTML
+     *
+     * @param array $attrib Named parameters
+     *
+     * @return string HTML code for the gui object
+     */
+    public function folder_list($attrib)
+    {
+        static $a_mailboxes;
+
+        $attrib += array('maxlength' => 100, 'realnames' => false, 'unreadwrap' => ' (%s)');
+
+        $rcmail  = rcmail::get_instance();
+        $storage = $rcmail->get_storage();
+
+        // add some labels to client
+        $rcmail->output->add_label('purgefolderconfirm', 'deletemessagesconfirm');
+
+        $type = $attrib['type'] ? $attrib['type'] : 'ul';
+        unset($attrib['type']);
+
+        if ($type == 'ul' && !$attrib['id']) {
+            $attrib['id'] = 'rcmboxlist';
+        }
+
+        if (empty($attrib['folder_name'])) {
+            $attrib['folder_name'] = '*';
+        }
+
+        // get current folder
+        $mbox_name = $storage->get_folder();
+
+        // build the folders tree
+        if (empty($a_mailboxes)) {
+            // get mailbox list
+            $a_folders = $storage->list_folders_subscribed(
+                '', $attrib['folder_name'], $attrib['folder_filter']);
+            $delimiter = $storage->get_hierarchy_delimiter();
+            $a_mailboxes = array();
+
+            foreach ($a_folders as $folder) {
+                $rcmail->build_folder_tree($a_mailboxes, $folder, $delimiter);
+            }
+        }
+
+        // allow plugins to alter the folder tree or to localize folder names
+        $hook = $rcmail->plugins->exec_hook('render_mailboxlist', array(
+            'list'      => $a_mailboxes,
+            'delimiter' => $delimiter,
+            'type'      => $type,
+            'attribs'   => $attrib,
+        ));
+
+        $a_mailboxes = $hook['list'];
+        $attrib      = $hook['attribs'];
+
+        if ($type == 'select') {
+            $attrib['is_escaped'] = true;
+            $select = new html_select($attrib);
+
+            // add no-selection option
+            if ($attrib['noselection']) {
+                $select->add(html::quote($rcmail->gettext($attrib['noselection'])), '');
+            }
+
+            $rcmail->render_folder_tree_select($a_mailboxes, $mbox_name, $attrib['maxlength'], $select, $attrib['realnames']);
+            $out = $select->show($attrib['default']);
+        }
+        else {
+            $js_mailboxlist = array();
+            $tree = $rcmail->render_folder_tree_html($a_mailboxes, $mbox_name, $js_mailboxlist, $attrib);
+
+            if ($type != 'js') {
+                $out = html::tag('ul', $attrib, $tree, html::$common_attrib);
+
+                $rcmail->output->include_script('treelist.js');
+                $rcmail->output->add_gui_object('mailboxlist', $attrib['id']);
+                $rcmail->output->set_env('unreadwrap', $attrib['unreadwrap']);
+                $rcmail->output->set_env('collapsed_folders', (string)$rcmail->config->get('collapsed_folders'));
+            }
+
+            $rcmail->output->set_env('mailboxes', $js_mailboxlist);
+
+            // we can't use object keys in javascript because they are unordered
+            // we need sorted folders list for folder-selector widget
+            $rcmail->output->set_env('mailboxes_list', array_keys($js_mailboxlist));
+        }
+
+        return $out;
+    }
+
+    /**
+     * Return folders list as html_select object
+     *
+     * @param array $p  Named parameters
+     *
+     * @return html_select HTML drop-down object
+     */
+    public function folder_selector($p = array())
+    {
+        $p += array('maxlength' => 100, 'realnames' => false, 'is_escaped' => true);
+        $a_mailboxes = array();
+        $storage = $this->get_storage();
+
+        if (empty($p['folder_name'])) {
+            $p['folder_name'] = '*';
+        }
+
+        if ($p['unsubscribed']) {
+            $list = $storage->list_folders('', $p['folder_name'], $p['folder_filter'], $p['folder_rights']);
+        }
+        else {
+            $list = $storage->list_folders_subscribed('', $p['folder_name'], $p['folder_filter'], $p['folder_rights']);
+        }
+
+        $delimiter = $storage->get_hierarchy_delimiter();
+
+        if (!empty($p['exceptions'])) {
+            $list = array_diff($list, (array) $p['exceptions']);
+        }
+
+        if (!empty($p['additional'])) {
+            foreach ($p['additional'] as $add_folder) {
+                $add_items = explode($delimiter, $add_folder);
+                $folder    = '';
+                while (count($add_items)) {
+                    $folder .= array_shift($add_items);
+
+                    // @TODO: sorting
+                    if (!in_array($folder, $list)) {
+                        $list[] = $folder;
+                    }
+
+                    $folder .= $delimiter;
+                }
+            }
+        }
+
+        foreach ($list as $folder) {
+            $this->build_folder_tree($a_mailboxes, $folder, $delimiter);
+        }
+
+        $select = new html_select($p);
+
+        if ($p['noselection']) {
+            $select->add(html::quote($p['noselection']), '');
+        }
+
+        $this->render_folder_tree_select($a_mailboxes, $mbox, $p['maxlength'], $select, $p['realnames'], 0, $p);
+
+        return $select;
+    }
+
+    /**
+     * Create a hierarchical array of the mailbox list
+     */
+    public function build_folder_tree(&$arrFolders, $folder, $delm = '/', $path = '')
+    {
+        // Handle namespace prefix
+        $prefix = '';
+        if (!$path) {
+            $n_folder = $folder;
+            $folder = $this->storage->mod_folder($folder);
+
+            if ($n_folder != $folder) {
+                $prefix = substr($n_folder, 0, -strlen($folder));
+            }
+        }
+
+        $pos = strpos($folder, $delm);
+
+        if ($pos !== false) {
+            $subFolders    = substr($folder, $pos+1);
+            $currentFolder = substr($folder, 0, $pos);
+
+            // sometimes folder has a delimiter as the last character
+            if (!strlen($subFolders)) {
+                $virtual = false;
+            }
+            else if (!isset($arrFolders[$currentFolder])) {
+                $virtual = true;
+            }
+            else {
+                $virtual = $arrFolders[$currentFolder]['virtual'];
+            }
+        }
+        else {
+            $subFolders    = false;
+            $currentFolder = $folder;
+            $virtual       = false;
+        }
+
+        $path .= $prefix . $currentFolder;
+
+        if (!isset($arrFolders[$currentFolder])) {
+            $arrFolders[$currentFolder] = array(
+                'id' => $path,
+                'name' => rcube_charset::convert($currentFolder, 'UTF7-IMAP'),
+                'virtual' => $virtual,
+                'folders' => array());
+        }
+        else {
+            $arrFolders[$currentFolder]['virtual'] = $virtual;
+        }
+
+        if (strlen($subFolders)) {
+            $this->build_folder_tree($arrFolders[$currentFolder]['folders'], $subFolders, $delm, $path.$delm);
+        }
+    }
+
+    /**
+     * Return html for a structured list &lt;ul&gt; for the mailbox tree
+     */
+    public function render_folder_tree_html(&$arrFolders, &$mbox_name, &$jslist, $attrib, $nestLevel = 0)
+    {
+        $maxlength = intval($attrib['maxlength']);
+        $realnames = (bool)$attrib['realnames'];
+        $msgcounts = $this->storage->get_cache('messagecount');
+        $collapsed = $this->config->get('collapsed_folders');
+        $realnames = $this->config->get('show_real_foldernames');
+
+        $out = '';
+        foreach ($arrFolders as $folder) {
+            $title        = null;
+            $folder_class = $this->folder_classname($folder['id']);
+            $is_collapsed = strpos($collapsed, '&'.rawurlencode($folder['id']).'&') !== false;
+            $unread       = $msgcounts ? intval($msgcounts[$folder['id']]['UNSEEN']) : 0;
+
+            if ($folder_class && !$realnames) {
+                $foldername = $this->gettext($folder_class);
+            }
+            else {
+                $foldername = $folder['name'];
+
+                // shorten the folder name to a given length
+                if ($maxlength && $maxlength > 1) {
+                    $fname = abbreviate_string($foldername, $maxlength);
+                    if ($fname != $foldername) {
+                        $title = $foldername;
+                    }
+                    $foldername = $fname;
+                }
+            }
+
+            // make folder name safe for ids and class names
+            $folder_id = rcube_utils::html_identifier($folder['id'], true);
+            $classes   = array('mailbox');
+
+            // set special class for Sent, Drafts, Trash and Junk
+            if ($folder_class) {
+                $classes[] = $folder_class;
+            }
+
+            if ($folder['id'] == $mbox_name) {
+                $classes[] = 'selected';
+            }
+
+            if ($folder['virtual']) {
+                $classes[] = 'virtual';
+            }
+            else if ($unread) {
+                $classes[] = 'unread';
+            }
+
+            $js_name = $this->JQ($folder['id']);
+            $html_name = $this->Q($foldername) . ($unread ? html::span('unreadcount', sprintf($attrib['unreadwrap'], $unread)) : '');
+            $link_attrib = $folder['virtual'] ? array() : array(
+                'href' => $this->url(array('_mbox' => $folder['id'])),
+                'onclick' => sprintf("return %s.command('list','%s',this,event)", rcmail_output::JS_OBJECT_NAME, $js_name),
+                'rel' => $folder['id'],
+                'title' => $title,
+            );
+
+            $out .= html::tag('li', array(
+                'id' => "rcmli".$folder_id,
+                'class' => join(' ', $classes),
+                'noclose' => true),
+                html::a($link_attrib, $html_name));
+
+            if (!empty($folder['folders'])) {
+                $out .= html::div('treetoggle ' . ($is_collapsed ? 'collapsed' : 'expanded'), '&nbsp;');
+            }
+
+            $jslist[$folder['id']] = array(
+                'id'      => $folder['id'],
+                'name'    => $foldername,
+                'virtual' => $folder['virtual'],
+            );
+
+            if (!empty($folder_class)) {
+                $jslist[$folder['id']]['class'] = $folder_class;
+            }
+
+            if (!empty($folder['folders'])) {
+                $out .= html::tag('ul', array('style' => ($is_collapsed ? "display:none;" : null)),
+                    $this->render_folder_tree_html($folder['folders'], $mbox_name, $jslist, $attrib, $nestLevel+1));
+            }
+
+            $out .= "</li>\n";
+        }
+
+        return $out;
+    }
+
+    /**
+     * Return html for a flat list <select> for the mailbox tree
+     */
+    public function render_folder_tree_select(&$arrFolders, &$mbox_name, $maxlength, &$select, $realnames = false, $nestLevel = 0, $opts = array())
+    {
+        $out = '';
+
+        foreach ($arrFolders as $folder) {
+            // skip exceptions (and its subfolders)
+            if (!empty($opts['exceptions']) && in_array($folder['id'], $opts['exceptions'])) {
+                continue;
+            }
+
+            // skip folders in which it isn't possible to create subfolders
+            if (!empty($opts['skip_noinferiors'])) {
+                $attrs = $this->storage->folder_attributes($folder['id']);
+                if ($attrs && in_array('\\Noinferiors', $attrs)) {
+                    continue;
+                }
+            }
+
+            if (!$realnames && ($folder_class = $this->folder_classname($folder['id']))) {
+                $foldername = $this->gettext($folder_class);
+            }
+            else {
+                $foldername = $folder['name'];
+
+                // shorten the folder name to a given length
+                if ($maxlength && $maxlength > 1) {
+                    $foldername = abbreviate_string($foldername, $maxlength);
+                }
+            }
+
+            $select->add(str_repeat('&nbsp;', $nestLevel*4) . html::quote($foldername), $folder['id']);
+
+            if (!empty($folder['folders'])) {
+                $out .= $this->render_folder_tree_select($folder['folders'], $mbox_name, $maxlength,
+                    $select, $realnames, $nestLevel+1, $opts);
+            }
+        }
+
+        return $out;
+    }
+
+    /**
+     * Return internal name for the given folder if it matches the configured special folders
+     */
+    public function folder_classname($folder_id)
+    {
+        if ($folder_id == 'INBOX') {
+            return 'inbox';
+        }
+
+        // for these mailboxes we have localized labels and css classes
+        foreach (array('sent', 'drafts', 'trash', 'junk') as $smbx)
+        {
+            if ($folder_id === $this->config->get($smbx.'_mbox')) {
+                return $smbx;
+            }
+        }
+    }
+
+    /**
+     * Try to localize the given IMAP folder name.
+     * UTF-7 decode it in case no localized text was found
+     *
+     * @param string $name      Folder name
+     * @param bool   $with_path Enable path localization
+     *
+     * @return string Localized folder name in UTF-8 encoding
+     */
+    public function localize_foldername($name, $with_path = false)
+    {
+        $realnames = $this->config->get('show_real_foldernames');
+
+        if (!$realnames && ($folder_class = $this->folder_classname($name))) {
+            return $this->gettext($folder_class);
+        }
+
+        // try to localize path of the folder
+        if ($with_path && !$realnames) {
+            $storage   = $this->get_storage();
+            $delimiter = $storage->get_hierarchy_delimiter();
+            $path      = explode($delimiter, $name);
+            $count     = count($path);
+
+            if ($count > 1) {
+                for ($i = 1; $i < $count; $i++) {
+                    $folder = implode($delimiter, array_slice($path, 0, -$i));
+                    if ($folder_class = $this->folder_classname($folder)) {
+                        $name = implode($delimiter, array_slice($path, $count - $i));
+                        return $this->gettext($folder_class) . $delimiter . rcube_charset::convert($name, 'UTF7-IMAP');
+                    }
+                }
+            }
+        }
+
+        return rcube_charset::convert($name, 'UTF7-IMAP');
+    }
+
+
+    public function localize_folderpath($path)
+    {
+        $protect_folders = $this->config->get('protect_default_folders');
+        $delimiter       = $this->storage->get_hierarchy_delimiter();
+        $path            = explode($delimiter, $path);
+        $result          = array();
+
+        foreach ($path as $idx => $dir) {
+            $directory = implode($delimiter, array_slice($path, 0, $idx+1));
+            if ($protect_folders && $this->storage->is_special_folder($directory)) {
+                unset($result);
+                $result[] = $this->localize_foldername($directory);
+            }
+            else {
+                $result[] = rcube_charset::convert($dir, 'UTF7-IMAP');
+            }
+        }
+
+        return implode($delimiter, $result);
+    }
+
+
+    public static function quota_display($attrib)
+    {
+        $rcmail = rcmail::get_instance();
+
+        if (!$attrib['id']) {
+            $attrib['id'] = 'rcmquotadisplay';
+        }
+
+        $_SESSION['quota_display'] = !empty($attrib['display']) ? $attrib['display'] : 'text';
+
+        $rcmail->output->add_gui_object('quotadisplay', $attrib['id']);
+
+        $quota = $rcmail->quota_content($attrib);
+
+        $rcmail->output->add_script('rcmail.set_quota('.rcube_output::json_serialize($quota).');', 'docready');
+
+        return html::span($attrib, '&nbsp;');
+    }
+
+
+    public function quota_content($attrib = null)
+    {
+        $quota = $this->storage->get_quota();
+        $quota = $this->plugins->exec_hook('quota', $quota);
+
+        $quota_result = (array) $quota;
+        $quota_result['type'] = isset($_SESSION['quota_display']) ? $_SESSION['quota_display'] : '';
+
+        if ($quota['total'] > 0) {
+            if (!isset($quota['percent'])) {
+                $quota_result['percent'] = min(100, round(($quota['used']/max(1,$quota['total']))*100));
+            }
+
+            $title = sprintf('%s / %s (%.0f%%)',
+                $this->show_bytes($quota['used'] * 1024), $this->show_bytes($quota['total'] * 1024),
+                $quota_result['percent']);
+
+            $quota_result['title'] = $title;
+
+            if ($attrib['width']) {
+                $quota_result['width'] = $attrib['width'];
+            }
+            if ($attrib['height']) {
+                $quota_result['height']	= $attrib['height'];
+            }
+        }
+        else {
+            $unlimited               = $this->config->get('quota_zero_as_unlimited');
+            $quota_result['title']   = $this->gettext($unlimited ? 'unlimited' : 'unknown');
+            $quota_result['percent'] = 0;
+        }
+
+        return $quota_result;
+    }
+
+    /**
+     * Outputs error message according to server error/response codes
+     *
+     * @param string $fallback       Fallback message label
+     * @param array  $fallback_args  Fallback message label arguments
+     * @param string $suffix         Message label suffix
+     */
+    public function display_server_error($fallback = null, $fallback_args = null, $suffix = '')
+    {
+        $err_code = $this->storage->get_error_code();
+        $res_code = $this->storage->get_response_code();
+        $args     = array();
+
+        if ($res_code == rcube_storage::NOPERM) {
+            $error = 'errornoperm';
+        }
+        else if ($res_code == rcube_storage::READONLY) {
+            $error = 'errorreadonly';
+        }
+        else if ($res_code == rcube_storage::OVERQUOTA) {
+            $error = 'errorroverquota';
+        }
+        else if ($err_code && ($err_str = $this->storage->get_error_str())) {
+            // try to detect access rights problem and display appropriate message
+            if (stripos($err_str, 'Permission denied') !== false) {
+                $error = 'errornoperm';
+            }
+            // try to detect full mailbox problem and display appropriate message
+            // there can be e.g. "Quota exceeded" or "quotum would exceed"
+            else if (stripos($err_str, 'quot') !== false && stripos($err_str, 'exceed') !== false) {
+                $error = 'erroroverquota';
+            }
+            else {
+                $error = 'servererrormsg';
+                $args  = array('msg' => $err_str);
+            }
+        }
+        else if ($err_code < 0) {
+            $error = 'storageerror';
+        }
+        else if ($fallback) {
+            $error = $fallback;
+            $args  = $fallback_args;
+        }
+
+        if ($error) {
+            if ($suffix && $this->text_exists($error . $suffix)) {
+                $error .= $suffix;
+            }
+            $this->output->show_message($error, 'error', $args);
+        }
+    }
+
+    /**
+     * Output HTML editor scripts
+     *
+     * @param string $mode  Editor mode
+     */
+    public function html_editor($mode = '')
+    {
+        $hook = $this->plugins->exec_hook('html_editor', array('mode' => $mode));
+
+        if ($hook['abort']) {
+            return;
+        }
+
+        $lang = strtolower($_SESSION['language']);
+
+        // TinyMCE uses two-letter lang codes, with exception of Chinese
+        if (strpos($lang, 'zh_') === 0) {
+            $lang = str_replace('_', '-', $lang);
+        }
+        else {
+            $lang = substr($lang, 0, 2);
+        }
+
+        if (!file_exists(INSTALL_PATH . 'program/js/tiny_mce/langs/'.$lang.'.js')) {
+            $lang = 'en';
+        }
+
+        $script = json_encode(array(
+            'mode'       => $mode,
+            'lang'       => $lang,
+            'skin_path'  => $this->output->get_skin_path(),
+            'spellcheck' => intval($this->config->get('enable_spellcheck')),
+            'spelldict'  => intval($this->config->get('spellcheck_dictionary'))
+        ));
+
+        $this->output->include_script('tiny_mce/tiny_mce.js');
+        $this->output->include_script('editor.js');
+        $this->output->add_script("rcmail_editor_init($script)", 'docready');
+    }
+
+    /**
+     * Replaces TinyMCE's emoticon images with plain-text representation
+     *
+     * @param string $html  HTML content
+     *
+     * @return string HTML content
+     */
+    public static function replace_emoticons($html)
+    {
+        $emoticons = array(
+            '8-)' => 'smiley-cool',
+            ':-#' => 'smiley-foot-in-mouth',
+            ':-*' => 'smiley-kiss',
+            ':-X' => 'smiley-sealed',
+            ':-P' => 'smiley-tongue-out',
+            ':-@' => 'smiley-yell',
+            ":'(" => 'smiley-cry',
+            ':-(' => 'smiley-frown',
+            ':-D' => 'smiley-laughing',
+            ':-)' => 'smiley-smile',
+            ':-S' => 'smiley-undecided',
+            ':-$' => 'smiley-embarassed',
+            'O:-)' => 'smiley-innocent',
+            ':-|' => 'smiley-money-mouth',
+            ':-O' => 'smiley-surprised',
+            ';-)' => 'smiley-wink',
+        );
+
+        foreach ($emoticons as $idx => $file) {
+            // <img title="Cry" src="http://.../program/js/tiny_mce/plugins/emotions/img/smiley-cry.gif" border="0" alt="Cry" />
+            $search[]  = '/<img title="[a-z ]+" src="https?:\/\/[a-z0-9_.\/-]+\/tiny_mce\/plugins\/emotions\/img\/'.$file.'.gif"[^>]+\/>/i';
+            $replace[] = $idx;
+        }
+
+        return preg_replace($search, $replace, $html);
+    }
+
+    /**
+     * File upload progress handler.
+     */
+    public function upload_progress()
+    {
+        $prefix = ini_get('apc.rfc1867_prefix');
+        $params = array(
+            'action' => $this->action,
+            'name' => rcube_utils::get_input_value('_progress', rcube_utils::INPUT_GET),
+        );
+
+        if (function_exists('apc_fetch')) {
+            $status = apc_fetch($prefix . $params['name']);
+
+            if (!empty($status)) {
+                $status['percent'] = round($status['current']/$status['total']*100);
+                $params = array_merge($status, $params);
+            }
+        }
+
+        if (isset($params['percent']))
+            $params['text'] = $this->gettext(array('name' => 'uploadprogress', 'vars' => array(
+                'percent' => $params['percent'] . '%',
+                'current' => $this->show_bytes($params['current']),
+                'total'   => $this->show_bytes($params['total'])
+        )));
+
+        $this->output->command('upload_progress_update', $params);
+        $this->output->send();
+    }
+
+    /**
+     * Initializes file uploading interface.
+     */
+    public function upload_init()
+    {
+        // Enable upload progress bar
+        $rfc1867 = filter_var(ini_get('apc.rfc1867'), FILTER_VALIDATE_BOOLEAN);
+        if ($rfc1867 && ($seconds = $this->config->get('upload_progress'))) {
+            if ($field_name = ini_get('apc.rfc1867_name')) {
+                $this->output->set_env('upload_progress_name', $field_name);
+                $this->output->set_env('upload_progress_time', (int) $seconds);
+            }
+        }
+
+        // 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;
+        }
+
+        $this->output->set_env('max_filesize', $max_filesize);
+        $max_filesize = $this->show_bytes($max_filesize);
+        $this->output->set_env('filesizeerror', $this->gettext(array(
+            'name' => 'filesizeerror', 'vars' => array('size' => $max_filesize))));
+
+        return $max_filesize;
+    }
+
+    /**
+     * Initializes client-side autocompletion.
+     */
+    public function autocomplete_init()
+    {
+        static $init;
+
+        if ($init) {
+            return;
+        }
+
+        $init = 1;
+
+        if (($threads = (int)$this->config->get('autocomplete_threads')) > 0) {
+            $book_types = (array) $this->config->get('autocomplete_addressbooks', 'sql');
+            if (count($book_types) > 1) {
+                $this->output->set_env('autocomplete_threads', $threads);
+                $this->output->set_env('autocomplete_sources', $book_types);
+            }
+        }
+
+        $this->output->set_env('autocomplete_max', (int)$this->config->get('autocomplete_max', 15));
+        $this->output->set_env('autocomplete_min_length', $this->config->get('autocomplete_min_length'));
+        $this->output->add_label('autocompletechars', 'autocompletemore');
+    }
+
+    /**
+     * Returns supported font-family specifications
+     *
+     * @param string $font  Font name
+     *
+     * @param string|array Font-family specification array or string (if $font is used)
+     */
+    public static function font_defs($font = null)
+    {
+        $fonts = array(
+            'Andale Mono'   => '"Andale Mono",Times,monospace',
+            'Arial'         => 'Arial,Helvetica,sans-serif',
+            'Arial Black'   => '"Arial Black","Avant Garde",sans-serif',
+            'Book Antiqua'  => '"Book Antiqua",Palatino,serif',
+            'Courier New'   => '"Courier New",Courier,monospace',
+            'Georgia'       => 'Georgia,Palatino,serif',
+            'Helvetica'     => 'Helvetica,Arial,sans-serif',
+            'Impact'        => 'Impact,Chicago,sans-serif',
+            'Tahoma'        => 'Tahoma,Arial,Helvetica,sans-serif',
+            'Terminal'      => 'Terminal,Monaco,monospace',
+            'Times New Roman' => '"Times New Roman",Times,serif',
+            'Trebuchet MS'  => '"Trebuchet MS",Geneva,sans-serif',
+            'Verdana'       => 'Verdana,Geneva,sans-serif',
+        );
+
+        if ($font) {
+            return $fonts[$font];
+        }
+
+        return $fonts;
+    }
+
+    /**
+     * Create a human readable string for a number of bytes
+     *
+     * @param int Number of bytes
+     *
+     * @return string Byte string
+     */
+    public function show_bytes($bytes)
+    {
+        if ($bytes >= 1073741824) {
+            $gb  = $bytes/1073741824;
+            $str = sprintf($gb>=10 ? "%d " : "%.1f ", $gb) . $this->gettext('GB');
+        }
+        else if ($bytes >= 1048576) {
+            $mb  = $bytes/1048576;
+            $str = sprintf($mb>=10 ? "%d " : "%.1f ", $mb) . $this->gettext('MB');
+        }
+        else if ($bytes >= 1024) {
+            $str = sprintf("%d ",  round($bytes/1024)) . $this->gettext('KB');
+        }
+        else {
+            $str = sprintf('%d ', $bytes) . $this->gettext('B');
+        }
+
+        return $str;
+    }
+
+    /**
+     * Returns real size (calculated) of the message part
+     *
+     * @param rcube_message_part  Message part
+     *
+     * @return string Part size (and unit)
+     */
+    public function message_part_size($part)
+    {
+        if (isset($part->d_parameters['size'])) {
+            $size = $this->show_bytes((int)$part->d_parameters['size']);
+        }
+        else {
+          $size = $part->size;
+          if ($part->encoding == 'base64') {
+            $size = $size / 1.33;
+          }
+
+          $size = '~' . $this->show_bytes($size);
+        }
+
+        return $size;
+    }
+
+    /**
+     * Returns message UID(s) and IMAP folder(s) from GET/POST data
+     *
+     * @param  string UID value to decode
+     * @param  string Default mailbox value (if not encoded in UIDs)
+     * @return array  List of message UIDs per folder
+     */
+    public static function get_uids($uids = null, $mbox = null)
+    {
+        // message UID (or comma-separated list of IDs) is provided in
+        // the form of <ID>-<MBOX>[,<ID>-<MBOX>]*
+
+        $_uid  = $uids ?: rcube_utils::get_input_value('_uid', RCUBE_INPUT_GPC);
+        $_mbox = $mbox ?: (string)rcube_utils::get_input_value('_mbox', RCUBE_INPUT_GPC);
+
+        // already a hash array
+        if (is_array($_uid) && !isset($_uid[0])) {
+            return $_uid;
+        }
+
+        $result = array();
+
+        // special case: *
+        if ($_uid == '*' && is_object($_SESSION['search'][1]) && $_SESSION['search'][1]->multi) {
+            // extract the full list of UIDs per folder from the search set
+            foreach ($_SESSION['search'][1]->sets as $subset) {
+                $mbox = $subset->get_parameters('MAILBOX');
+                $result[$mbox] = $subset->get();
+            }
+        }
+        else {
+            if (is_string($_uid))
+                $_uid = explode(',', $_uid);
+
+            // create a per-folder UIDs array
+            foreach ((array)$_uid as $uid) {
+                list($uid, $mbox) = explode('-', $uid, 2);
+                if (!strlen($mbox))
+                    $mbox = $_mbox;
+                if ($uid == '*')
+                    $result[$mbox] = $uid;
+                else
+                    $result[$mbox][] = $uid;
+            }
+        }
+
+        return $result;
+    }
+
+
+    /************************************************************************
+     *********          Deprecated methods (to be removed)          *********
+     ***********************************************************************/
+
+    public static function setcookie($name, $value, $exp = 0)
+    {
+        rcube_utils::setcookie($name, $value, $exp);
+    }
+
+    public function imap_connect()
+    {
+        return $this->storage_connect();
+    }
+
+    public function imap_init()
+    {
+        return $this->storage_init();
+    }
+
+    /**
+     * Connect to the mail storage server with stored session data
+     *
+     * @return bool True on success, False on error
+     */
+    public function storage_connect()
+    {
+        $storage = $this->get_storage();
+
+        if ($_SESSION['storage_host'] && !$storage->is_connected()) {
+            $host = $_SESSION['storage_host'];
+            $user = $_SESSION['username'];
+            $port = $_SESSION['storage_port'];
+            $ssl  = $_SESSION['storage_ssl'];
+            $pass = $this->decrypt($_SESSION['password']);
+
+            if (!$storage->connect($host, $user, $pass, $port, $ssl)) {
+                if (is_object($this->output)) {
+                    $this->output->show_message('storageerror', 'error');
+                }
+            }
+            else {
+                $this->set_storage_prop();
+            }
+        }
+
         return $storage->is_connected();
-      }
     }
-
-    return false;
-  }
-
-
-  /**
-   * Create session object and start the session.
-   */
-  public function session_init()
-  {
-    // session started (Installer?)
-    if (session_id())
-      return;
-
-    $sess_name   = $this->config->get('session_name');
-    $sess_domain = $this->config->get('session_domain');
-    $lifetime    = $this->config->get('session_lifetime', 0) * 60;
-
-    // set session domain
-    if ($sess_domain) {
-      ini_set('session.cookie_domain', $sess_domain);
-    }
-    // set session garbage collecting time according to session_lifetime
-    if ($lifetime) {
-      ini_set('session.gc_maxlifetime', $lifetime * 2);
-    }
-
-    ini_set('session.cookie_secure', rcube_https_check());
-    ini_set('session.name', $sess_name ? $sess_name : 'roundcube_sessid');
-    ini_set('session.use_cookies', 1);
-    ini_set('session.use_only_cookies', 1);
-    ini_set('session.serialize_handler', 'php');
-
-    // use database for storing session data
-    $this->session = new rcube_session($this->get_dbh(), $this->config);
-
-    $this->session->register_gc_handler('rcmail_temp_gc');
-    $this->session->register_gc_handler(array($this, 'cache_gc'));
-
-    // start PHP session (if not in CLI mode)
-    if ($_SERVER['REMOTE_ADDR'])
-      session_start();
-
-    // set initial session vars
-    if (!$_SESSION['user_id'])
-      $_SESSION['temp'] = true;
-
-    // restore skin selection after logout
-    if ($_SESSION['temp'] && !empty($_SESSION['skin']))
-      $this->config->set('skin', $_SESSION['skin']);
-  }
-
-
-  /**
-   * Configure session object internals
-   */
-  public function session_configure()
-  {
-    if (!$this->session)
-      return;
-
-    $lifetime = $this->config->get('session_lifetime', 0) * 60;
-
-    // set keep-alive/check-recent interval
-    if ($keep_alive = $this->config->get('keep_alive')) {
-      // be sure that it's less than session lifetime
-      if ($lifetime)
-        $keep_alive = min($keep_alive, $lifetime - 30);
-      $keep_alive = max(60, $keep_alive);
-      $this->session->set_keep_alive($keep_alive);
-    }
-
-    $this->session->set_secret($this->config->get('des_key') . $_SERVER['HTTP_USER_AGENT']);
-    $this->session->set_ip_check($this->config->get('ip_check'));
-  }
-
-
-  /**
-   * Perfom login to the mail server and to the webmail service.
-   * This will also create a new user entry if auto_create_user is configured.
-   *
-   * @param string Mail storage (IMAP) user name
-   * @param string Mail storage (IMAP) password
-   * @param string Mail storage (IMAP) host
-   *
-   * @return boolean True on success, False on failure
-   */
-  function login($username, $pass, $host=NULL)
-  {
-    if (empty($username)) {
-      return false;
-    }
-
-    $config = $this->config->all();
-
-    if (!$host)
-      $host = $config['default_host'];
-
-    // Validate that selected host is in the list of configured hosts
-    if (is_array($config['default_host'])) {
-      $allowed = false;
-      foreach ($config['default_host'] as $key => $host_allowed) {
-        if (!is_numeric($key))
-          $host_allowed = $key;
-        if ($host == $host_allowed) {
-          $allowed = true;
-          break;
-        }
-      }
-      if (!$allowed)
-        return false;
-      }
-    else if (!empty($config['default_host']) && $host != rcube_parse_host($config['default_host']))
-      return false;
-
-    // parse $host URL
-    $a_host = parse_url($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 && $ssl != 'tls' && (!$config['default_port'] || $config['default_port'] == 143))
-        $port = 993;
-    }
-
-    if (!$port) {
-        $port = $config['default_port'];
-    }
-
-    /* Modify username with domain if required
-       Inspired by Marco <P0L0_notspam_binware.org>
-    */
-    // Check if we need to add domain
-    if (!empty($config['username_domain']) && strpos($username, '@') === false) {
-      if (is_array($config['username_domain']) && isset($config['username_domain'][$host]))
-        $username .= '@'.rcube_parse_host($config['username_domain'][$host], $host);
-      else if (is_string($config['username_domain']))
-        $username .= '@'.rcube_parse_host($config['username_domain'], $host);
-    }
-
-    // Convert username to lowercase. If storage backend
-    // is case-insensitive we need to store always the same username (#1487113)
-    if ($config['login_lc']) {
-      $username = mb_strtolower($username);
-    }
-
-    // try to resolve email address from virtuser table
-    if (strpos($username, '@') && ($virtuser = rcube_user::email2user($username))) {
-      $username = $virtuser;
-    }
-
-    // Here we need IDNA ASCII
-    // Only rcube_contacts class is using domain names in Unicode
-    $host = rcube_idn_to_ascii($host);
-    if (strpos($username, '@')) {
-      // lowercase domain name
-      list($local, $domain) = explode('@', $username);
-      $username = $local . '@' . mb_strtolower($domain);
-      $username = rcube_idn_to_ascii($username);
-    }
-
-    // user already registered -> overwrite username
-    if ($user = rcube_user::query($username, $host))
-      $username = $user->data['username'];
-
-    if (!$this->storage)
-      $this->storage_init();
-
-    // try to log in
-    if (!($login = $this->storage->connect($host, $username, $pass, $port, $ssl))) {
-      // try with lowercase
-      $username_lc = mb_strtolower($username);
-      if ($username_lc != $username) {
-        // try to find user record again -> overwrite username
-        if (!$user && ($user = rcube_user::query($username_lc, $host)))
-          $username_lc = $user->data['username'];
-
-        if ($login = $this->storage->connect($host, $username_lc, $pass, $port, $ssl))
-          $username = $username_lc;
-      }
-    }
-
-    // exit if login failed
-    if (!$login) {
-      return false;
-    }
-
-    // user already registered -> update user's record
-    if (is_object($user)) {
-      // update last login timestamp
-      $user->touch();
-    }
-    // create new system user
-    else if ($config['auto_create_user']) {
-      if ($created = rcube_user::create($username, $host)) {
-        $user = $created;
-      }
-      else {
-        raise_error(array(
-          'code' => 620, 'type' => 'php',
-          'file' => __FILE__, 'line' => __LINE__,
-          'message' => "Failed to create a user record. Maybe aborted by a plugin?"
-          ), true, false);
-      }
-    }
-    else {
-      raise_error(array(
-        'code' => 621, 'type' => 'php',
-        'file' => __FILE__, 'line' => __LINE__,
-        'message' => "Access denied for new user $username. 'auto_create_user' is disabled"
-        ), true, false);
-    }
-
-    // login succeeded
-    if (is_object($user) && $user->ID) {
-      // Configure environment
-      $this->set_user($user);
-      $this->set_storage_prop();
-      $this->session_configure();
-
-      // fix some old settings according to namespace prefix
-      $this->fix_namespace_settings($user);
-
-      // create default folders on first login
-      if ($config['create_default_folders'] && (!empty($created) || empty($user->data['last_login']))) {
-        $this->storage->create_default_folders();
-      }
-
-      // 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']     = $this->encrypt($pass);
-      $_SESSION['login_time']   = mktime();
-
-      if (isset($_REQUEST['_timezone']) && $_REQUEST['_timezone'] != '_default_')
-        $_SESSION['timezone'] = floatval($_REQUEST['_timezone']);
-      if (isset($_REQUEST['_dstactive']) && $_REQUEST['_dstactive'] != '_default_')
-        $_SESSION['dst_active'] = intval($_REQUEST['_dstactive']);
-
-      // force reloading complete list of subscribed mailboxes
-      $this->storage->clear_cache('mailboxes', true);
-
-      return true;
-    }
-
-    return false;
-  }
-
-
-  /**
-   * Set storage parameters.
-   * This must be done AFTER connecting to the server!
-   */
-  private function set_storage_prop()
-  {
-    $storage = $this->get_storage();
-
-    $storage->set_charset($this->config->get('default_charset', RCMAIL_CHARSET));
-
-    if ($default_folders = $this->config->get('default_folders')) {
-      $storage->set_default_folders($default_folders);
-    }
-    if (isset($_SESSION['mbox'])) {
-      $storage->set_folder($_SESSION['mbox']);
-    }
-    if (isset($_SESSION['page'])) {
-      $storage->set_page($_SESSION['page']);
-    }
-  }
-
-
-  /**
-   * Auto-select IMAP host based on the posted login information
-   *
-   * @return string Selected IMAP host
-   */
-  public function autoselect_host()
-  {
-    $default_host = $this->config->get('default_host');
-    $host = null;
-
-    if (is_array($default_host)) {
-      $post_host = get_input_value('_host', RCUBE_INPUT_POST);
-
-      // direct match in default_host array
-      if ($default_host[$post_host] || in_array($post_host, array_values($default_host))) {
-        $host = $post_host;
-      }
-
-      // try to select host by mail domain
-      list($user, $domain) = explode('@', get_input_value('_user', RCUBE_INPUT_POST));
-      if (!empty($domain)) {
-        foreach ($default_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 $host is still not set
-      if (empty($host)) {
-        list($key, $val) = each($default_host);
-        $host = is_numeric($key) ? $val : $key;
-      }
-    }
-    else if (empty($default_host)) {
-      $host = get_input_value('_host', RCUBE_INPUT_POST);
-    }
-    else
-      $host = rcube_parse_host($default_host);
-
-    return $host;
-  }
-
-
-  /**
-   * Get localized text in the desired language
-   *
-   * @param mixed   $attrib  Named parameters array or label name
-   * @param string  $domain  Label domain (plugin) name
-   *
-   * @return string Localized text
-   */
-  public function gettext($attrib, $domain=null)
-  {
-    // load localization files if not done yet
-    if (empty($this->texts))
-      $this->load_language();
-
-    // extract attributes
-    if (is_string($attrib))
-      $attrib = array('name' => $attrib);
-
-    $name = $attrib['name'] ? $attrib['name'] : '';
-
-    // attrib contain text values: use them from now
-    if (($setval = $attrib[strtolower($_SESSION['language'])]) || ($setval = $attrib['en_us']))
-        $this->texts[$name] = $setval;
-
-    // check for text with domain
-    if ($domain && ($text = $this->texts[$domain.'.'.$name]))
-      ;
-    // text does not exist
-    else if (!($text = $this->texts[$name])) {
-      return "[$name]";
-    }
-
-    // replace vars in text
-    if (is_array($attrib['vars'])) {
-      foreach ($attrib['vars'] as $var_key => $var_value)
-        $text = str_replace($var_key[0]!='$' ? '$'.$var_key : $var_key, $var_value, $text);
-    }
-
-    // format output
-    if (($attrib['uppercase'] && strtolower($attrib['uppercase']=='first')) || $attrib['ucfirst'])
-      return ucfirst($text);
-    else if ($attrib['uppercase'])
-      return mb_strtoupper($text);
-    else if ($attrib['lowercase'])
-      return mb_strtolower($text);
-
-    return strtr($text, array('\n' => "\n"));
-  }
-
-
-  /**
-   * Check if the given text label exists
-   *
-   * @param string  $name       Label name
-   * @param string  $domain     Label domain (plugin) name or '*' for all domains
-   * @param string  $ref_domain Sets domain name if label is found
-   *
-   * @return boolean True if text exists (either in the current language or in en_US)
-   */
-  public function text_exists($name, $domain = null, &$ref_domain = null)
-  {
-    // load localization files if not done yet
-    if (empty($this->texts))
-      $this->load_language();
-
-    if (isset($this->texts[$name])) {
-        $ref_domain = '';
-        return true;
-    }
-
-    // any of loaded domains (plugins)
-    if ($domain == '*') {
-      foreach ($this->plugins->loaded_plugins() as $domain)
-        if (isset($this->texts[$domain.'.'.$name])) {
-          $ref_domain = $domain;
-          return true;
-        }
-    }
-    // specified domain
-    else if ($domain) {
-      $ref_domain = $domain;
-      return isset($this->texts[$domain.'.'.$name]);
-    }
-
-    return false;
-  }
-
-  /**
-   * Load a localization package
-   *
-   * @param string Language ID
-   */
-  public function load_language($lang = null, $add = array())
-  {
-    $lang = $this->language_prop(($lang ? $lang : $_SESSION['language']));
-
-    // load localized texts
-    if (empty($this->texts) || $lang != $_SESSION['language']) {
-      $this->texts = array();
-
-      // handle empty lines after closing PHP tag in localization files
-      ob_start();
-
-      // get english labels (these should be complete)
-      @include(INSTALL_PATH . 'program/localization/en_US/labels.inc');
-      @include(INSTALL_PATH . 'program/localization/en_US/messages.inc');
-
-      if (is_array($labels))
-        $this->texts = $labels;
-      if (is_array($messages))
-        $this->texts = array_merge($this->texts, $messages);
-
-      // include user language files
-      if ($lang != 'en' && is_dir(INSTALL_PATH . 'program/localization/' . $lang)) {
-        include_once(INSTALL_PATH . 'program/localization/' . $lang . '/labels.inc');
-        include_once(INSTALL_PATH . 'program/localization/' . $lang . '/messages.inc');
-
-        if (is_array($labels))
-          $this->texts = array_merge($this->texts, $labels);
-        if (is_array($messages))
-          $this->texts = array_merge($this->texts, $messages);
-      }
-
-      ob_end_clean();
-
-      $_SESSION['language'] = $lang;
-    }
-
-    // append additional texts (from plugin)
-    if (is_array($add) && !empty($add))
-      $this->texts += $add;
-  }
-
-
-  /**
-   * Read directory program/localization and return a list of available languages
-   *
-   * @return array List of available localizations
-   */
-  public function list_languages()
-  {
-    static $sa_languages = array();
-
-    if (!sizeof($sa_languages)) {
-      @include(INSTALL_PATH . 'program/localization/index.inc');
-
-      if ($dh = @opendir(INSTALL_PATH . 'program/localization')) {
-        while (($name = readdir($dh)) !== false) {
-          if ($name[0] == '.' || !is_dir(INSTALL_PATH . 'program/localization/' . $name))
-            continue;
-
-          if ($label = $rcube_languages[$name])
-            $sa_languages[$name] = $label;
-        }
-        closedir($dh);
-      }
-    }
-
-    return $sa_languages;
-  }
-
-
-  /**
-   * Destroy session data and remove cookie
-   */
-  public function kill_session()
-  {
-    $this->plugins->exec_hook('session_destroy');
-
-    $this->session->kill();
-    $_SESSION = array('language' => $this->user->language, 'temp' => true, 'skin' => $this->config->get('skin'));
-    $this->user->reset();
-  }
-
-
-  /**
-   * Do server side actions on logout
-   */
-  public function logout_actions()
-  {
-    $config = $this->config->all();
-
-    // on logout action we're not connected to imap server
-    if (($config['logout_purge'] && !empty($config['trash_mbox'])) || $config['logout_expunge']) {
-      if (!$this->session->check_auth())
-        return;
-
-      $this->storage_connect();
-    }
-
-    if ($config['logout_purge'] && !empty($config['trash_mbox'])) {
-      $this->storage->clear_folder($config['trash_mbox']);
-    }
-
-    if ($config['logout_expunge']) {
-      $this->storage->expunge_folder('INBOX');
-    }
-
-    // Try to save unsaved user preferences
-    if (!empty($_SESSION['preferences'])) {
-      $this->user->save_prefs(unserialize($_SESSION['preferences']));
-    }
-  }
-
-
-  /**
-   * Function to be executed in script shutdown
-   * Registered with register_shutdown_function()
-   */
-  public function shutdown()
-  {
-    foreach ($this->shutdown_functions as $function)
-      call_user_func($function);
-
-    if (is_object($this->smtp))
-      $this->smtp->disconnect();
-
-    foreach ($this->address_books as $book) {
-      if (is_object($book) && is_a($book, 'rcube_addressbook'))
-        $book->close();
-    }
-
-    foreach ($this->caches as $cache) {
-        if (is_object($cache))
-            $cache->close();
-    }
-
-    if (is_object($this->storage)) {
-        if ($this->expunge_cache)
-            $this->storage->expunge_cache();
-      $this->storage->close();
-  }
-
-    // before closing the database connection, write session data
-    if ($_SERVER['REMOTE_ADDR'] && is_object($this->session)) {
-      session_write_close();
-    }
-
-    // write performance stats to logs/console
-    if ($this->config->get('devel_mode')) {
-      if (function_exists('memory_get_usage'))
-        $mem = show_bytes(memory_get_usage());
-      if (function_exists('memory_get_peak_usage'))
-        $mem .= '/'.show_bytes(memory_get_peak_usage());
-
-      $log = $this->task . ($this->action ? '/'.$this->action : '') . ($mem ? " [$mem]" : '');
-      if (defined('RCMAIL_START'))
-        rcube_print_time(RCMAIL_START, $log);
-      else
-        console($log);
-    }
-  }
-
-
-  /**
-   * Registers shutdown function to be executed on shutdown.
-   * The functions will be executed before destroying any
-   * objects like smtp, imap, session, etc.
-   *
-   * @param callback Function callback
-   */
-  public function add_shutdown_function($function)
-  {
-    $this->shutdown_functions[] = $function;
-  }
-
-
-  /**
-   * Garbage collector for cache entries.
-   * Set flag to expunge caches on shutdown
-   */
-  function cache_gc()
-  {
-    // because this gc function is called before storage is initialized,
-    // we just set a flag to expunge storage cache on shutdown.
-    $this->expunge_cache = true;
-  }
-
-
-  /**
-   * Generate a unique token to be used in a form request
-   *
-   * @return string The request token
-   */
-  public function get_request_token()
-  {
-    $sess_id = $_COOKIE[ini_get('session.name')];
-    if (!$sess_id) $sess_id = session_id();
-    $plugin = $this->plugins->exec_hook('request_token', array('value' => md5('RT' . $this->user->ID . $this->config->get('des_key') . $sess_id)));
-    return $plugin['value'];
-  }
-
-
-  /**
-   * Check if the current request contains a valid token
-   *
-   * @param int Request method
-   * @return boolean True if request token is valid false if not
-   */
-  public function check_request($mode = RCUBE_INPUT_POST)
-  {
-    $token = get_input_value('_token', $mode);
-    $sess_id = $_COOKIE[ini_get('session.name')];
-    return !empty($sess_id) && $token == $this->get_request_token();
-  }
-
-
-  /**
-   * Create unique authorization hash
-   *
-   * @param string Session ID
-   * @param int Timestamp
-   * @return string The generated auth hash
-   */
-  private function get_auth_hash($sess_id, $ts)
-  {
-    $auth_string = sprintf('rcmail*sess%sR%s*Chk:%s;%s',
-      $sess_id,
-      $ts,
-      $this->config->get('ip_check') ? $_SERVER['REMOTE_ADDR'] : '***.***.***.***',
-      $_SERVER['HTTP_USER_AGENT']);
-
-    if (function_exists('sha1'))
-      return sha1($auth_string);
-    else
-      return md5($auth_string);
-  }
-
-
-  /**
-   * Encrypt using 3DES
-   *
-   * @param string $clear clear text input
-   * @param string $key encryption key to retrieve from the configuration, defaults to 'des_key'
-   * @param boolean $base64 whether or not to base64_encode() the result before returning
-   *
-   * @return string encrypted text
-   */
-  public function encrypt($clear, $key = 'des_key', $base64 = true)
-  {
-    if (!$clear)
-      return '';
-    /*-
-     * Add a single canary byte to the end of the clear text, which
-     * will help find out how much of padding will need to be removed
-     * upon decryption; see http://php.net/mcrypt_generic#68082
-     */
-    $clear = pack("a*H2", $clear, "80");
-
-    if (function_exists('mcrypt_module_open') &&
-        ($td = mcrypt_module_open(MCRYPT_TripleDES, "", MCRYPT_MODE_CBC, "")))
-    {
-      $iv = $this->create_iv(mcrypt_enc_get_iv_size($td));
-      mcrypt_generic_init($td, $this->config->get_crypto_key($key), $iv);
-      $cipher = $iv . mcrypt_generic($td, $clear);
-      mcrypt_generic_deinit($td);
-      mcrypt_module_close($td);
-    }
-    else {
-      @include_once 'des.inc';
-
-      if (function_exists('des')) {
-        $des_iv_size = 8;
-        $iv = $this->create_iv($des_iv_size);
-        $cipher = $iv . des($this->config->get_crypto_key($key), $clear, 1, 1, $iv);
-      }
-      else {
-        raise_error(array(
-          'code' => 500, 'type' => 'php',
-          'file' => __FILE__, 'line' => __LINE__,
-          'message' => "Could not perform encryption; make sure Mcrypt is installed or lib/des.inc is available"
-        ), true, true);
-      }
-    }
-
-    return $base64 ? base64_encode($cipher) : $cipher;
-  }
-
-  /**
-   * Decrypt 3DES-encrypted string
-   *
-   * @param string $cipher encrypted text
-   * @param string $key encryption key to retrieve from the configuration, defaults to 'des_key'
-   * @param boolean $base64 whether or not input is base64-encoded
-   *
-   * @return string decrypted text
-   */
-  public function decrypt($cipher, $key = 'des_key', $base64 = true)
-  {
-    if (!$cipher)
-      return '';
-
-    $cipher = $base64 ? base64_decode($cipher) : $cipher;
-
-    if (function_exists('mcrypt_module_open') &&
-        ($td = mcrypt_module_open(MCRYPT_TripleDES, "", MCRYPT_MODE_CBC, "")))
-    {
-      $iv_size = mcrypt_enc_get_iv_size($td);
-      $iv = substr($cipher, 0, $iv_size);
-
-      // session corruption? (#1485970)
-      if (strlen($iv) < $iv_size)
-        return '';
-
-      $cipher = substr($cipher, $iv_size);
-      mcrypt_generic_init($td, $this->config->get_crypto_key($key), $iv);
-      $clear = mdecrypt_generic($td, $cipher);
-      mcrypt_generic_deinit($td);
-      mcrypt_module_close($td);
-    }
-    else {
-      @include_once 'des.inc';
-
-      if (function_exists('des')) {
-        $des_iv_size = 8;
-        $iv = substr($cipher, 0, $des_iv_size);
-        $cipher = substr($cipher, $des_iv_size);
-        $clear = des($this->config->get_crypto_key($key), $cipher, 0, 1, $iv);
-      }
-      else {
-        raise_error(array(
-          'code' => 500, 'type' => 'php',
-          'file' => __FILE__, 'line' => __LINE__,
-          'message' => "Could not perform decryption; make sure Mcrypt is installed or lib/des.inc is available"
-        ), true, true);
-      }
-    }
-
-    /*-
-     * Trim PHP's padding and the canary byte; see note in
-     * rcmail::encrypt() and http://php.net/mcrypt_generic#68082
-     */
-    $clear = substr(rtrim($clear, "\0"), 0, -1);
-
-    return $clear;
-  }
-
-  /**
-   * Generates encryption initialization vector (IV)
-   *
-   * @param int Vector size
-   * @return string Vector string
-   */
-  private function create_iv($size)
-  {
-    // mcrypt_create_iv() can be slow when system lacks entrophy
-    // we'll generate IV vector manually
-    $iv = '';
-    for ($i = 0; $i < $size; $i++)
-        $iv .= chr(mt_rand(0, 255));
-    return $iv;
-  }
-
-  /**
-   * Build a valid URL to this instance of Roundcube
-   *
-   * @param mixed Either a string with the action or url parameters as key-value pairs
-   * @return string Valid application URL
-   */
-  public function url($p)
-  {
-    if (!is_array($p))
-      $p = array('_action' => @func_get_arg(0));
-
-    $task = $p['_task'] ? $p['_task'] : ($p['task'] ? $p['task'] : $this->task);
-    $p['_task'] = $task;
-    unset($p['task']);
-
-    $url = './';
-    $delm = '?';
-    foreach (array_reverse($p) as $key => $val) {
-      if ($val !== '' && $val !== null) {
-        $par = $key[0] == '_' ? $key : '_'.$key;
-        $url .= $delm.urlencode($par).'='.urlencode($val);
-        $delm = '&';
-      }
-    }
-    return $url;
-  }
-
-
-  /**
-   * Use imagemagick or GD lib to read image properties
-   *
-   * @param string Absolute file path
-   * @return mixed Hash array with image props like type, width, height or False on error
-   */
-  public static function imageprops($filepath)
-  {
-    $rcmail = rcmail::get_instance();
-    if ($cmd = $rcmail->config->get('im_identify_path', false)) {
-      list(, $type, $size) = explode(' ', strtolower(rcmail::exec($cmd. ' 2>/dev/null {in}', array('in' => $filepath))));
-      if ($size)
-        list($width, $height) = explode('x', $size);
-    }
-    else if (function_exists('getimagesize')) {
-      $imsize = @getimagesize($filepath);
-      $width = $imsize[0];
-      $height = $imsize[1];
-      $type = preg_replace('!image/!', '', $imsize['mime']);
-    }
-
-    return $type ? array('type' => $type, 'width' => $width, 'height' => $height) : false;
-  }
-
-
-  /**
-   * Convert an image to a given size and type using imagemagick (ensures input is an image)
-   *
-   * @param $p['in']  Input filename (mandatory)
-   * @param $p['out'] Output filename (mandatory)
-   * @param $p['size']  Width x height of resulting image, e.g. "160x60"
-   * @param $p['type']  Output file type, e.g. "jpg"
-   * @param $p['-opts'] Custom command line options to ImageMagick convert
-   * @return Success of convert as true/false
-   */
-  public static function imageconvert($p)
-  {
-    $result = false;
-    $rcmail = rcmail::get_instance();
-    $convert  = $rcmail->config->get('im_convert_path', false);
-    $identify = $rcmail->config->get('im_identify_path', false);
-
-    // imagemagick is required for this
-    if (!$convert)
-        return false;
-
-    if (!(($imagetype = @exif_imagetype($p['in'])) && ($type = image_type_to_extension($imagetype, false))))
-      list(, $type) = explode(' ', strtolower(rcmail::exec($identify . ' 2>/dev/null {in}', $p))); # for things like eps
-
-    $type = strtr($type, array("jpeg" => "jpg", "tiff" => "tif", "ps" => "eps", "ept" => "eps"));
-    $p += array('type' => $type, 'types' => "bmp,eps,gif,jp2,jpg,png,svg,tif", 'quality' => 75);
-    $p['-opts'] = array('-resize' => $p['size'].'>') + (array)$p['-opts'];
-
-    if (in_array($type, explode(',', $p['types']))) # Valid type?
-      $result = rcmail::exec($convert . ' 2>&1 -flatten -auto-orient -colorspace RGB -quality {quality} {-opts} {in} {type}:{out}', $p) === "";
-
-    return $result;
-  }
-
-
-  /**
-   * Construct shell command, execute it and return output as string.
-   * Keywords {keyword} are replaced with arguments
-   *
-   * @param $cmd Format string with {keywords} to be replaced
-   * @param $values (zero, one or more arrays can be passed)
-   * @return output of command. shell errors not detectable
-   */
-  public static function exec(/* $cmd, $values1 = array(), ... */)
-  {
-    $args = func_get_args();
-    $cmd = array_shift($args);
-    $values = $replacements = array();
-
-    // merge values into one array
-    foreach ($args as $arg)
-      $values += (array)$arg;
-
-    preg_match_all('/({(-?)([a-z]\w*)})/', $cmd, $matches, PREG_SET_ORDER);
-    foreach ($matches as $tags) {
-      list(, $tag, $option, $key) = $tags;
-      $parts = array();
-
-      if ($option) {
-        foreach ((array)$values["-$key"] as $key => $value) {
-          if ($value === true || $value === false || $value === null)
-            $parts[] = $value ? $key : "";
-          else foreach ((array)$value as $val)
-            $parts[] = "$key " . escapeshellarg($val);
-        }
-      }
-      else {
-        foreach ((array)$values[$key] as $value)
-          $parts[] = escapeshellarg($value);
-      }
-
-      $replacements[$tag] = join(" ", $parts);
-    }
-
-    // use strtr behaviour of going through source string once
-    $cmd = strtr($cmd, $replacements);
-
-    return (string)shell_exec($cmd);
-  }
-
-
-  /**
-   * Helper method to set a cookie with the current path and host settings
-   *
-   * @param string Cookie name
-   * @param string Cookie value
-   * @param string Expiration time
-   */
-  public static function setcookie($name, $value, $exp = 0)
-  {
-    if (headers_sent())
-      return;
-
-    $cookie = session_get_cookie_params();
-
-    setcookie($name, $value, $exp, $cookie['path'], $cookie['domain'],
-      rcube_https_check(), true);
-  }
-
-  /**
-   * Registers action aliases for current task
-   *
-   * @param array $map Alias-to-filename hash array
-   */
-  public function register_action_map($map)
-  {
-    if (is_array($map)) {
-      foreach ($map as $idx => $val) {
-        $this->action_map[$idx] = $val;
-      }
-    }
-  }
-
-  /**
-   * Returns current action filename
-   *
-   * @param array $map Alias-to-filename hash array
-   */
-  public function get_action_file()
-  {
-    if (!empty($this->action_map[$this->action])) {
-      return $this->action_map[$this->action];
-    }
-
-    return strtr($this->action, '-', '_') . '.inc';
-  }
-
-  /**
-   * Fixes some user preferences according to namespace handling change.
-   * Old Roundcube versions were using folder names with removed namespace prefix.
-   * Now we need to add the prefix on servers where personal namespace has prefix.
-   *
-   * @param rcube_user $user User object
-   */
-  private function fix_namespace_settings($user)
-  {
-    $prefix     = $this->storage->get_namespace('prefix');
-    $prefix_len = strlen($prefix);
-
-    if (!$prefix_len)
-      return;
-
-    $prefs = $this->config->all();
-    if (!empty($prefs['namespace_fixed']))
-      return;
-
-    // Build namespace prefix regexp
-    $ns     = $this->storage->get_namespace();
-    $regexp = array();
-
-    foreach ($ns as $entry) {
-      if (!empty($entry)) {
-        foreach ($entry as $item) {
-          if (strlen($item[0])) {
-            $regexp[] = preg_quote($item[0], '/');
-          }
-        }
-      }
-    }
-    $regexp = '/^('. implode('|', $regexp).')/';
-
-    // Fix preferences
-    $opts = array('drafts_mbox', 'junk_mbox', 'sent_mbox', 'trash_mbox', 'archive_mbox');
-    foreach ($opts as $opt) {
-      if ($value = $prefs[$opt]) {
-        if ($value != 'INBOX' && !preg_match($regexp, $value)) {
-          $prefs[$opt] = $prefix.$value;
-        }
-      }
-    }
-
-    if (!empty($prefs['default_folders'])) {
-      foreach ($prefs['default_folders'] as $idx => $name) {
-        if ($name != 'INBOX' && !preg_match($regexp, $name)) {
-          $prefs['default_folders'][$idx] = $prefix.$name;
-        }
-      }
-    }
-
-    if (!empty($prefs['search_mods'])) {
-      $folders = array();
-      foreach ($prefs['search_mods'] as $idx => $value) {
-        if ($idx != 'INBOX' && $idx != '*' && !preg_match($regexp, $idx)) {
-          $idx = $prefix.$idx;
-        }
-        $folders[$idx] = $value;
-      }
-      $prefs['search_mods'] = $folders;
-    }
-
-    if (!empty($prefs['message_threading'])) {
-      $folders = array();
-      foreach ($prefs['message_threading'] as $idx => $value) {
-        if ($idx != 'INBOX' && !preg_match($regexp, $idx)) {
-          $idx = $prefix.$idx;
-        }
-        $folders[$prefix.$idx] = $value;
-      }
-      $prefs['message_threading'] = $folders;
-    }
-
-    if (!empty($prefs['collapsed_folders'])) {
-      $folders     = explode('&&', $prefs['collapsed_folders']);
-      $count       = count($folders);
-      $folders_str = '';
-
-      if ($count) {
-          $folders[0]        = substr($folders[0], 1);
-          $folders[$count-1] = substr($folders[$count-1], 0, -1);
-      }
-
-      foreach ($folders as $value) {
-        if ($value != 'INBOX' && !preg_match($regexp, $value)) {
-          $value = $prefix.$value;
-        }
-        $folders_str .= '&'.$value.'&';
-      }
-      $prefs['collapsed_folders'] = $folders_str;
-    }
-
-    $prefs['namespace_fixed'] = true;
-
-    // save updated preferences and reset imap settings (default folders)
-    $user->save_prefs($prefs);
-    $this->set_storage_prop();
-  }
-
 }

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