githubFork/roundcubemail.git

			@@ -4,9 +4,12 @@
			+-----------------------------------------------------------------------+
			\| program/include/main.inc \|
			\| \|
			\| This file is part of the RoundCube Webmail client \|
			\| Copyright (C) 2005-2007, RoundCube Dev, - Switzerland \|
			\| Licensed under the GNU GPL \|
			\| This file is part of the Roundcube Webmail client \|
			\| Copyright (C) 2005-2011, The Roundcube Dev Team \|
			\| \|
			\| Licensed under the GNU General Public License version 3 or \|
			\| any later version with exceptions for skins & plugins. \|
			\| See the README file for a full license statement. \|
			\| \|
			\| PURPOSE: \|
			\| Provide basic functions for the webmail package \|
			@@ -20,328 +23,19 @@
			*/

			/**
			* RoundCube Webmail common functions
			* Roundcube Webmail common functions
			*
			* @package Core
			* @author Thomas Bruederli <roundcube@gmail.com>
			*/

			require_once('lib/des.inc');
			require_once('lib/utf7.inc');
			require_once('lib/utf8.class.php');
			require_once('include/rcube_user.inc');
			require_once('include/rcube_shared.inc');
			require_once('include/rcmail_template.inc');

			require_once INSTALL_PATH . 'program/include/rcube_shared.inc';

			// define constannts for input reading
			define('RCUBE_INPUT_GET', 0x0101);
			define('RCUBE_INPUT_POST', 0x0102);
			define('RCUBE_INPUT_GPC', 0x0103);


			/**
			* Initial startup function
			* to register session, create database and imap connections
			*
			* @param string Current task
			*/
			function rcmail_startup($task='mail')
			{
			global $sess_id, $sess_user_lang;
			global $CONFIG, $INSTALL_PATH, $BROWSER, $OUTPUT, $_SESSION, $IMAP, $DB, $USER;

			// check client
			$BROWSER = rcube_browser();

			// load configuration
			$CONFIG = rcmail_load_config();

			// set session domain
			if (isset($CONFIG['session_domain']) && !empty($CONFIG['session_domain'])) {
			ini_set('session.cookie_domain', $CONFIG['session_domain']);
			}

			// set session garbage collecting time according to session_lifetime
			if (!empty($CONFIG['session_lifetime']))
			ini_set('session.gc_maxlifetime', ($CONFIG['session_lifetime']) * 120);

			// prepare DB connection
			$dbwrapper = empty($CONFIG['db_backend']) ? 'db' : $CONFIG['db_backend'];
			$dbclass = "rcube_" . $dbwrapper;
			require_once("include/$dbclass.inc");

			$DB = new $dbclass($CONFIG['db_dsnw'], $CONFIG['db_dsnr'], $CONFIG['db_persistent']);
			$DB->sqlite_initials = $INSTALL_PATH.'SQL/sqlite.initial.sql';
			$DB->db_connect('w');

			// use database for storing session data
			include_once('include/session.inc');

			// init session
			session_start();
			$sess_id = session_id();

			// create session and set session vars
			if (!isset($_SESSION['auth_time']))
			{
			$_SESSION['user_lang'] = rcube_language_prop($CONFIG['locale_string']);
			$_SESSION['auth_time'] = time();
			$_SESSION['temp'] = true;
			}

			// set session vars global
			$sess_user_lang = rcube_language_prop($_SESSION['user_lang']);

			// create user object
			$USER = new rcube_user($_SESSION['user_id']);

			// overwrite config with user preferences
			$CONFIG = array_merge($CONFIG, (array)$USER->get_prefs());


			// reset some session parameters when changing task
			if ($_SESSION['task'] != $task)
			unset($_SESSION['page']);

			// set current task to session
			$_SESSION['task'] = $task;

			// create IMAP object
			if ($task=='mail')
			rcmail_imap_init();


			// set localization
			if ($CONFIG['locale_string'])
			setlocale(LC_ALL, $CONFIG['locale_string']);
			else if ($sess_user_lang)
			setlocale(LC_ALL, $sess_user_lang);


			register_shutdown_function('rcmail_shutdown');
			}


			/**
			* Load roundcube configuration array
			*
			* @return array Named configuration parameters
			*/
			function rcmail_load_config()
			{
			global $INSTALL_PATH;

			// load config file
			include_once('config/main.inc.php');
			$conf = is_array($rcmail_config) ? $rcmail_config : array();

			// load host-specific configuration
			rcmail_load_host_config($conf);

			$conf['skin_path'] = $conf['skin_path'] ? unslashify($conf['skin_path']) : 'skins/default';

			// load db conf
			include_once('config/db.inc.php');
			$conf = array_merge($conf, $rcmail_config);

			if (empty($conf['log_dir']))
			$conf['log_dir'] = $INSTALL_PATH.'logs';
			else
			$conf['log_dir'] = unslashify($conf['log_dir']);

			// set PHP error logging according to config
			if ($conf['debug_level'] & 1)
			{
			ini_set('log_errors', 1);
			ini_set('error_log', $conf['log_dir'].'/errors');
			}
			if ($conf['debug_level'] & 4)
			ini_set('display_errors', 1);
			else
			ini_set('display_errors', 0);

			return $conf;
			}


			/**
			* Load a host-specific config file if configured
			* This will merge the host specific configuration with the given one
			*
			* @param array Global configuration parameters
			*/
			function rcmail_load_host_config(&$config)
			{
			$fname = NULL;

			if (is_array($config['include_host_config']))
			$fname = $config['include_host_config'][$_SERVER['HTTP_HOST']];
			else if (!empty($config['include_host_config']))
			$fname = preg_replace('/[^a-z0-9\.\-_]/i', '', $_SERVER['HTTP_HOST']) . '.inc.php';

			if ($fname && is_file('config/'.$fname))
			{
			include('config/'.$fname);
			$config = array_merge($config, $rcmail_config);
			}
			}


			/**
			* Create unique authorization hash
			*
			* @param string Session ID
			* @param int Timestamp
			* @return string The generated auth hash
			*/
			function rcmail_auth_hash($sess_id, $ts)
			{
			global $CONFIG;

			$auth_string = sprintf('rcmailsess%sR%sChk:%s;%s',
			$sess_id,
			$ts,
			$CONFIG['ip_check'] ? $_SERVER['REMOTE_ADDR'] : '*...*',
			$_SERVER['HTTP_USER_AGENT']);

			if (function_exists('sha1'))
			return sha1($auth_string);
			else
			return md5($auth_string);
			}


			/**
			* Check the auth hash sent by the client against the local session credentials
			*
			* @return boolean True if valid, False if not
			*/
			function rcmail_authenticate_session()
			{
			global $CONFIG, $SESS_CLIENT_IP, $SESS_CHANGED;

			// advanced session authentication
			if ($CONFIG['double_auth'])
			{
			$now = time();
			$valid = ($_COOKIE['sessauth'] == rcmail_auth_hash(session_id(), $_SESSION['auth_time']) \|\|
			$_COOKIE['sessauth'] == rcmail_auth_hash(session_id(), $_SESSION['last_auth']));

			// renew auth cookie every 5 minutes (only for GET requests)
			if (!$valid \|\| ($_SERVER['REQUEST_METHOD']!='POST' && $now-$_SESSION['auth_time'] > 300))
			{
			$_SESSION['last_auth'] = $_SESSION['auth_time'];
			$_SESSION['auth_time'] = $now;
			setcookie('sessauth', rcmail_auth_hash(session_id(), $now));
			}
			}
			else
			$valid = $CONFIG['ip_check'] ? $_SERVER['REMOTE_ADDR'] == $SESS_CLIENT_IP : true;

			// check session filetime
			if (!empty($CONFIG['session_lifetime']) && isset($SESS_CHANGED)
			&& $SESS_CHANGED + $CONFIG['session_lifetime']*60 < time())
			$valid = false;

			return $valid;
			}


			/**
			* Create global IMAP object and connect to server
			*
			* @param boolean True if connection should be established
			*/
			function rcmail_imap_init($connect=FALSE)
			{
			global $CONFIG, $DB, $IMAP, $OUTPUT;

			$IMAP = new rcube_imap($DB);
			$IMAP->debug_level = $CONFIG['debug_level'];
			$IMAP->skip_deleted = $CONFIG['skip_deleted'];


			// connect with stored session data
			if ($connect)
			{
			if (!($conn = $IMAP->connect($_SESSION['imap_host'], $_SESSION['username'], decrypt_passwd($_SESSION['password']), $_SESSION['imap_port'], $_SESSION['imap_ssl'])))
			$OUTPUT->show_message('imaperror', 'error');

			rcmail_set_imap_prop();
			}

			// enable caching of imap data
			if ($CONFIG['enable_caching']===TRUE)
			$IMAP->set_caching(TRUE);

			// set pagesize from config
			if (isset($CONFIG['pagesize']))
			$IMAP->set_pagesize($CONFIG['pagesize']);
			}


			/**
			* Set root dir and last stored mailbox
			* This must be done AFTER connecting to the server!
			*/
			function rcmail_set_imap_prop()
			{
			global $CONFIG, $IMAP;

			// set root dir from config
			if (!empty($CONFIG['imap_root']))
			$IMAP->set_rootdir($CONFIG['imap_root']);

			if (is_array($CONFIG['default_imap_folders']))
			$IMAP->set_default_mailboxes($CONFIG['default_imap_folders']);

			if (!empty($_SESSION['mbox']))
			$IMAP->set_mailbox($_SESSION['mbox']);
			if (isset($_SESSION['page']))
			$IMAP->set_page($_SESSION['page']);
			}


			/**
			* Do these things on script shutdown
			*/
			function rcmail_shutdown()
			{
			global $IMAP, $CONTACTS;

			if (is_object($IMAP))
			{
			$IMAP->close();
			$IMAP->write_cache();
			}

			if (is_object($CONTACTS))
			$CONTACTS->close();

			// before closing the database connection, write session data
			session_write_close();
			}


			/**
			* Destroy session data and remove cookie
			*/
			function rcmail_kill_session()
			{
			global $USER;

			if ((isset($_SESSION['sort_col']) && $_SESSION['sort_col']!=$a_user_prefs['message_sort_col']) \|\|
			(isset($_SESSION['sort_order']) && $_SESSION['sort_order']!=$a_user_prefs['message_sort_order']))
			{
			$a_user_prefs = array('message_sort_col' => $_SESSION['sort_col'], 'message_sort_order' => $_SESSION['sort_order']);
			$USER->save_prefs($a_user_prefs);
			}

			$_SESSION = array('user_lang' => $GLOBALS['sess_user_lang'], 'auth_time' => time(), 'temp' => true);
			setcookie('sessauth', '-del-', time()-60);
			$USER->reset();
			}


			/**
			@@ -353,364 +47,62 @@
			function get_table_name($table)
			{
			global $CONFIG;


			// return table name if configured
			$config_key = 'db_table_'.$table;

			if (strlen($CONFIG[$config_key]))
			return $CONFIG[$config_key];


			return $table;
			}


			/**
			* Return correct name for a specific database sequence
			* (used for Postres only)
			* (used for Postgres only)
			*
			* @param string Secuence name
			* @return string Translated sequence name
			*/
			function get_sequence_name($sequence)
			{
			global $CONFIG;

			// return table name if configured
			// return sequence name if configured
			$config_key = 'db_sequence_'.$sequence;
			$opt = rcmail::get_instance()->config->get($config_key);

			if (strlen($CONFIG[$config_key]))
			return $CONFIG[$config_key];

			if (!empty($opt))
			return $opt;

			return $sequence;
			}


			/**
			* Check the given string and returns language properties
			* Get localized text in the desired language
			* It's a global wrapper for rcmail::gettext()
			*
			* @param string Language code
			* @param string Peropert name
			* @return string Property value
			* @param mixed Named parameters array or label name
			* @param string Domain to search in (e.g. plugin name)
			* @return string Localized text
			* @see rcmail::gettext()
			*/
			function rcube_language_prop($lang, $prop='lang')
			{
			global $INSTALL_PATH;
			static $rcube_languages, $rcube_language_aliases, $rcube_charsets;

			if (empty($rcube_languages))
			@include($INSTALL_PATH.'program/localization/index.inc');

			// 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
			if (!isset($rcube_languages[$lang]) && strlen($lang)>2)
			{
			$lang = substr($lang, 0, 2);
			$lang = rcube_language_prop($lang);
			}

			if (!isset($rcube_languages[$lang]))
			$lang = 'en_US';

			// language has special charset configured
			if (isset($rcube_charsets[$lang]))
			$charset = $rcube_charsets[$lang];
			else
			$charset = 'UTF-8';


			if ($prop=='charset')
			return $charset;
			else
			return $lang;
			}


			/**
			* 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
			*/
			function rcmail_load_gui()
			{
			global $CONFIG, $OUTPUT, $sess_user_lang;

			// init output page
			$OUTPUT = new rcmail_template($CONFIG, $GLOBALS['_task']);
			$OUTPUT->set_env('comm_path', $GLOBALS['COMM_PATH']);

			if (is_array($CONFIG['javascript_config']))
			{
			foreach ($CONFIG['javascript_config'] as $js_config_var)
			$OUTPUT->set_env($js_config_var, $CONFIG[$js_config_var]);
			}

			if (!empty($GLOBALS['_framed']))
			$OUTPUT->set_env('framed', true);

			// set locale setting
			rcmail_set_locale($sess_user_lang);

			// set user-selected charset
			if (!empty($CONFIG['charset']))
			$OUTPUT->set_charset($CONFIG['charset']);

			// register common UI objects
			$OUTPUT->add_handlers(array(
			'loginform' => 'rcmail_login_form',
			'username' => 'rcmail_current_username',
			'message' => 'rcmail_message_container',
			'charsetselector' => 'rcmail_charset_selector',
			));

			// add some basic label to client
			if (!$OUTPUT->ajax_call)
			rcube_add_label('loading', 'movingmessage');
			}
			function rcube_label($p, $domain=null)
			{
			return rcmail::get_instance()->gettext($p, $domain);
			}


			/**
			* Set localization charset based on the given language.
			* This also creates a global property for mbstring usage.
			*/
			function rcmail_set_locale($lang)
			{
			global $OUTPUT, $MBSTRING;
			static $s_mbstring_loaded = NULL;

			// settings for mbstring module (by Tadashi Jokagi)
			if (is_null($s_mbstring_loaded))
			$MBSTRING = $s_mbstring_loaded = extension_loaded("mbstring");
			else
			$MBSTRING = $s_mbstring_loaded = FALSE;

			if ($MBSTRING)
			mb_internal_encoding(RCMAIL_CHARSET);

			$OUTPUT->set_charset(rcube_language_prop($lang, 'charset'));
			}


			/**
			* Auto-select IMAP host based on the posted login information
			* Global wrapper of rcmail::text_exists()
			* to check whether a text label is defined
			*
			* @return string Selected IMAP host
			* @see rcmail::text_exists()
			*/
			function rcmail_autoselect_host()
			{
			global $CONFIG;

			$host = isset($_POST['_host']) ? get_input_value('_host', RCUBE_INPUT_POST) : $CONFIG['default_host'];
			if (is_array($host))
			{
			list($user, $domain) = explode('@', get_input_value('_user', RCUBE_INPUT_POST));
			if (!empty($domain))
			{
			foreach ($host as $imap_host => $mail_domains)
			if (is_array($mail_domains) && in_array($domain, $mail_domains))
			{
			$host = $imap_host;
			break;
			}
			}

			// take the first entry if $host is still an array
			if (is_array($host))
			$host = array_shift($host);
			}

			return $host;
			}


			/**
			* Perfom login to the IMAP server and to the webmail service.
			* This will also create a new user entry if auto_create_user is configured.
			*
			* @param string IMAP user name
			* @param string IMAP password
			* @param string IMAP host
			* @return boolean True on success, False on failure
			*/
			function rcmail_login($user, $pass, $host=NULL)
			{
			global $CONFIG, $IMAP, $DB, $USER, $sess_user_lang;
			$user_id = NULL;

			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 != $CONFIG['default_host'])
			return FALSE;

			// parse $host URL
			$a_host = parse_url($host);
			if ($a_host['host'])
			{
			$host = $a_host['host'];
			$imap_ssl = (isset($a_host['scheme']) && in_array($a_host['scheme'], array('ssl','imaps','tls'))) ? $a_host['scheme'] : null;
			$imap_port = isset($a_host['port']) ? $a_host['port'] : ($imap_ssl ? 993 : $CONFIG['default_port']);
			}
			else
			$imap_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($CONFIG['username_domain']) && !strpos($user, '@'))
			{
			if (is_array($CONFIG['username_domain']) && isset($CONFIG['username_domain'][$host]))
			$user .= '@'.$CONFIG['username_domain'][$host];
			else if (is_string($CONFIG['username_domain']))
			$user .= '@'.$CONFIG['username_domain'];
			}

			// try to resolve email address from virtuser table
			if (!empty($CONFIG['virtuser_file']) && strpos($user, '@'))
			$user = rcube_user::email2user($user);

			// lowercase username if it's an e-mail address (#1484473)
			if (strpos($user, '@'))
			$user = strtolower($user);

			// query if user already registered
			if ($existing = rcube_user::query($user, $host))
			$USER = $existing;

			// user already registered -> overwrite username
			if ($USER->ID)
			{
			$user_id = $USER->ID;
			$user = $USER->data['username'];
			}

			// exit if IMAP login failed
			if (!($imap_login = $IMAP->connect($host, $user, $pass, $imap_port, $imap_ssl)))
			return false;

			// user already registered
			if ($USER->ID)
			{
			// get user prefs
			$CONFIG = array_merge($CONFIG, (array)$USER->get_prefs());

			// set user specific language
			if (!empty($USER->data['language']))
			$sess_user_lang = $_SESSION['user_lang'] = $USER->data['language'];

			// update user's record
			$USER->touch();
			}
			// create new system user
			else if ($CONFIG['auto_create_user'])
			{
			if ($created = rcube_user::create($user, $host))
			{
			$USER = $created;

			// get existing mailboxes
			$a_mailboxes = $IMAP->list_mailboxes();
			}
			}
			else
			{
			raise_error(array(
			'code' => 600,
			'type' => 'php',
			'file' => "config/main.inc.php",
			'message' => "Acces denied for new user $user. 'auto_create_user' is disabled"
			), true, false);
			}

			if ($USER->ID)
			{
			$_SESSION['user_id'] = $USER->ID;
			$_SESSION['username'] = $USER->data['username'];
			$_SESSION['imap_host'] = $host;
			$_SESSION['imap_port'] = $imap_port;
			$_SESSION['imap_ssl'] = $imap_ssl;
			$_SESSION['user_lang'] = $sess_user_lang;
			$_SESSION['password'] = encrypt_passwd($pass);
			$_SESSION['login_time'] = mktime();

			// force reloading complete list of subscribed mailboxes
			rcmail_set_imap_prop();
			$IMAP->clear_cache('mailboxes');

			if ($CONFIG['create_default_folders'])
			$IMAP->create_default_folders();

			return TRUE;
			}

			return FALSE;
			}


			/**
			* Load virtuser table in array
			*
			* @return array Virtuser table entries
			*/
			function rcmail_getvirtualfile()
			{
			global $CONFIG;
			if (empty($CONFIG['virtuser_file']) \|\| !is_file($CONFIG['virtuser_file']))
			return FALSE;

			// read file
			$a_lines = file($CONFIG['virtuser_file']);
			return $a_lines;
			}


			/**
			* Find matches of the given pattern in virtuser table
			*
			* @param string Regular expression to search for
			* @return array Matching entries
			*/
			function rcmail_findinvirtual($pattern)
			{
			$result = array();
			$virtual = rcmail_getvirtualfile();
			if ($virtual==FALSE)
			return $result;

			// check each line for matches
			foreach ($virtual as $line)
			{
			$line = trim($line);
			if (empty($line) \|\| $line{0}=='#')
			continue;

			if (eregi($pattern, $line))
			$result[] = $line;
			}

			return $result;
			}
			function rcube_label_exists($name, $domain=null, &$ref_domain = null)
			{
			return rcmail::get_instance()->text_exists($name, $domain, $ref_domain);
			}


			/**
			@@ -720,9 +112,9 @@
			*/
			function rcmail_overwrite_action($action)
			{
			global $OUTPUT;
			$GLOBALS['_action'] = $action;
			$OUTPUT->set_env('action', $action);
			$app = rcmail::get_instance();
			$app->action = $action;
			$app->output->set_env('action', $action);
			}


			@@ -736,117 +128,9 @@
			*/
			function rcmail_url($action, $p=array(), $task=null)
			{
			global $MAIN_TASKS, $COMM_PATH;
			$qstring = '';
			$base = $COMM_PATH;

			if ($task && in_array($task, $MAIN_TASKS))
			$base = ereg_replace('_task=[a-z]+', '_task='.$task, $COMM_PATH);

			if (is_array($p))
			foreach ($p as $key => $val)
			$qstring .= '&'.urlencode($key).'='.urlencode($val);

			return $base . ($action ? '&_action='.$action : '') . $qstring;
			$app = rcmail::get_instance();
			return $app->url((array)$p + array('_action' => $action, 'task' => $task));
			}


			// @deprecated
			function show_message($message, $type='notice', $vars=NULL)
			{
			global $OUTPUT;
			$OUTPUT->show_message($message, $type, $vars);
			}


			/**
			* Encrypt IMAP password using DES encryption
			*
			* @param string Password to encrypt
			* @return string Encryprted string
			*/
			function encrypt_passwd($pass)
			{
			$cypher = des(get_des_key(), $pass, 1, 0, NULL);
			return base64_encode($cypher);
			}


			/**
			* Decrypt IMAP password using DES encryption
			*
			* @param string Encrypted password
			* @return string Plain password
			*/
			function decrypt_passwd($cypher)
			{
			$pass = des(get_des_key(), base64_decode($cypher), 0, 0, NULL);
			return preg_replace('/\x00/', '', $pass);
			}


			/**
			* Return a 24 byte key for the DES encryption
			*
			* @return string DES encryption key
			*/
			function get_des_key()
			{
			$key = !empty($GLOBALS['CONFIG']['des_key']) ? $GLOBALS['CONFIG']['des_key'] : 'rcmail?24BitPwDkeyF**ECB';
			$len = strlen($key);

			// make sure the key is exactly 24 chars long
			if ($len<24)
			$key .= str_repeat('_', 24-$len);
			else if ($len>24)
			substr($key, 0, 24);

			return $key;
			}


			/**
			* Read directory program/localization and return a list of available languages
			*
			* @return array List of available localizations
			*/
			function rcube_list_languages()
			{
			global $CONFIG, $INSTALL_PATH;
			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 ? $label : $name;
			}
			closedir($dh);
			}
			}
			return $sa_languages;
			}


			/**
			* Add a localized label to the client environment
			*/
			function rcube_add_label()
			{
			global $OUTPUT;

			$arg_list = func_get_args();
			foreach ($arg_list as $i => $name)
			$OUTPUT->command('add_label', $name, rcube_label($name));
			}


			/**
			@@ -854,117 +138,61 @@
			* Remove temp files older than two days
			*/
			function rcmail_temp_gc()
			{
			$tmp = unslashify($CONFIG['temp_dir']);
			{
			$rcmail = rcmail::get_instance();

			$tmp = unslashify($rcmail->config->get('temp_dir'));
			$expire = mktime() - 172800; // expire in 48 hours

			if ($dir = opendir($tmp))
			{
			while (($fname = readdir($dir)) !== false)
			{
			if ($dir = opendir($tmp)) {
			while (($fname = readdir($dir)) !== false) {
			if ($fname{0} == '.')
			continue;

			if (filemtime($tmp.'/'.$fname) < $expire)
			@unlink($tmp.'/'.$fname);
			}
			}

			closedir($dir);
			}
			}
			}


			/**
			* Garbage collector for cache entries.
			* Remove all expired message cache records
			*/
			function rcmail_message_cache_gc()
			{
			global $DB, $CONFIG;

			// no cache lifetime configured
			if (empty($CONFIG['message_cache_lifetime']))
			return;

			// get target timestamp
			$ts = get_offset_time($CONFIG['message_cache_lifetime'], -1);

			$DB->query("DELETE FROM ".get_table_name('messages')."
			WHERE created < ".$DB->fromunixtime($ts));
			}


			/**
			* Convert a string from one charset to another.
			* Uses mbstring and iconv functions if possible
			*
			* @param string Input string
			* @param string Suspected charset of the input string
			* @param string Target charset to convert to; defaults to RCMAIL_CHARSET
			* @return Converted string
			*/
			// Deprecated
			function rcube_charset_convert($str, $from, $to=NULL)
			{
			global $MBSTRING;
			{
			return rcube_charset::convert($str, $from, $to);
			}

			$from = strtoupper($from);
			$to = $to==NULL ? strtoupper(RCMAIL_CHARSET) : strtoupper($to);

			if ($from==$to \|\| $str=='' \|\| empty($from))
			return $str;

			$aliases = array(
			'UNKNOWN-8BIT' => 'ISO-8859-15',
			'X-UNKNOWN' => 'ISO-8859-15',
			'X-USER-DEFINED' => 'ISO-8859-15',
			'ISO-8859-8-I' => 'ISO-8859-8',
			'KS_C_5601-1987' => 'EUC-KR',
			'GB2312' => 'GB18030'
			);
			// Deprecated
			function rc_detect_encoding($string, $failover='')
			{
			return rcube_charset::detect($string, $failover);
			}

			// convert charset using iconv module
			if (function_exists('iconv') && $from != 'UTF-7' && $to != 'UTF-7')
			{
			return iconv(($aliases[$from] ? $aliases[$from] : $from), ($aliases[$to] ? $aliases[$to] : $to) . "//IGNORE", $str);
			}

			// convert charset using mbstring module
			if ($MBSTRING)
			{
			$mb_map = $aliases + array('UTF-7' => 'UTF7-IMAP');

			// return if convert succeeded
			if (($out = mb_convert_encoding($str, ($mb_map[$to] ? $mb_map[$to] : $to), ($mb_map[$from] ? $mb_map[$from] : $from))) != '')
			return $out;
			}
			// Deprecated
			function rc_utf8_clean($input)
			{
			return rcube_charset::clean($input);
			}

			$conv = new utf8();

			// convert string to UTF-8
			if ($from=='UTF-7')
			$str = utf7_to_utf8($str);
			else if (($from=='ISO-8859-1') && function_exists('utf8_encode'))
			$str = utf8_encode($str);
			else if ($from!='UTF-8')
			{
			$conv->loadCharset($from);
			$str = $conv->strToUtf8($str);
			}
			/**
			* Convert a variable into a javascript object notation
			*
			* @param mixed Input value
			* @return string Serialized JSON string
			*/
			function json_serialize($input)
			{
			$input = rcube_charset::clean($input);

			// encode string for output
			if ($to=='UTF-7')
			return utf8_to_utf7($str);
			else if ($to=='ISO-8859-1' && function_exists('utf8_decode'))
			return utf8_decode($str);
			else if ($to!='UTF-8')
			{
			$conv->loadCharset($to);
			return $conv->utf8ToStr($str);
			}

			// return UTF-8 string
			return $str;
			}
			// sometimes even using rcube_charset::clean() the input contains invalid UTF-8 sequences
			// that's why we have @ here
			return @json_encode($input);
			}


			/**
			@@ -974,26 +202,23 @@
			* @param string Encoding type: text\|html\|xml\|js\|url
			* @param string Replace mode for tags: show\|replace\|remove
			* @param boolean Convert newlines
			* @return The quoted string
			* @return string The quoted string
			*/
			function rep_specialchars_output($str, $enctype='', $mode='', $newlines=TRUE)
			{
			global $OUTPUT_TYPE, $OUTPUT;
			static $html_encode_arr, $js_rep_table, $xml_rep_table;
			static $html_encode_arr = false;
			static $js_rep_table = false;
			static $xml_rep_table = false;

			if (!$enctype)
			$enctype = $GLOBALS['OUTPUT_TYPE'];

			// encode for plaintext
			if ($enctype=='text')
			return str_replace("\r\n", "\n", $mode=='remove' ? strip_tags($str) : $str);
			$enctype = $OUTPUT->type;

			// encode for HTML output
			if ($enctype=='html')
			{
			if (!$html_encode_arr)
			{
			$html_encode_arr = get_html_translation_table(HTML_SPECIALCHARS);
			$html_encode_arr = get_html_translation_table(HTML_SPECIALCHARS);
			unset($html_encode_arr['?']);
			}

			@@ -1010,45 +235,47 @@
			}
			else if ($mode=='remove')
			$str = strip_tags($str);


			$out = strtr($str, $encode_arr);

			// avoid douple quotation of &
			$out = preg_replace('/&([a-z]{2,5}\|#[0-9]{2,4});/', '&\\1;', strtr($str, $encode_arr));

			$out = preg_replace('/&([A-Za-z]{2,6}\|#[0-9]{2,4});/', '&\\1;', $out);

			return $newlines ? nl2br($out) : $out;
			}

			if ($enctype=='url')
			return rawurlencode($str);

			// if the replace tables for XML and JS are not yet defined
			if (!$js_rep_table)
			if ($js_rep_table===false)
			{
			$js_rep_table = $xml_rep_table = array();
			$xml_rep_table['&'] = '&';

			for ($c=160; $c<256; $c++) // can be increased to support more charsets
			{
			$xml_rep_table[Chr($c)] = "&#$c;";

			if ($OUTPUT->get_charset()=='ISO-8859-1')
			$js_rep_table[Chr($c)] = sprintf("\\u%04x", $c);
			}
			$xml_rep_table[chr($c)] = "&#$c;";

			$xml_rep_table['"'] = '"';
			$js_rep_table['"'] = '\\"';
			$js_rep_table["'"] = "\\'";
			$js_rep_table["\\"] = "\\\\";
			// Unicode line and paragraph separators (#1486310)
			$js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A8))] = ' ';
			$js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A9))] = ' ';
			}

			// encode for javascript use
			if ($enctype=='js')
			return preg_replace(array("/\r?\n/", "/\r/", '/<\\//'), array('\n', '\n', '<\\/'), strtr($str, $js_rep_table));

			// encode for plaintext
			if ($enctype=='text')
			return str_replace("\r\n", "\n", $mode=='remove' ? strip_tags($str) : $str);

			if ($enctype=='url')
			return rawurlencode($str);

			// encode for XML
			if ($enctype=='xml')
			return strtr($str, $xml_rep_table);

			// encode for javascript use
			if ($enctype=='js')
			{
			if ($OUTPUT->get_charset()!='UTF-8')
			$str = rcube_charset_convert($str, RCMAIL_CHARSET, $OUTPUT->get_charset());

			return preg_replace(array("/\r?\n/", "/\r/"), array('\n', '\n'), addslashes(strtr($str, $js_rep_table)));
			}

			// no encoding given -> return original string
			return $str;
			@@ -1090,46 +317,115 @@
			* @return string Field value or NULL if not available
			*/
			function get_input_value($fname, $source, $allow_html=FALSE, $charset=NULL)
			{
			global $OUTPUT;
			{
			$value = NULL;

			if ($source==RCUBE_INPUT_GET && isset($_GET[$fname]))
			$value = $_GET[$fname];
			else if ($source==RCUBE_INPUT_POST && isset($_POST[$fname]))
			$value = $_POST[$fname];
			else if ($source==RCUBE_INPUT_GPC)
			{

			if ($source == RCUBE_INPUT_GET) {
			if (isset($_GET[$fname]))
			$value = $_GET[$fname];
			}
			else if ($source == RCUBE_INPUT_POST) {
			if (isset($_POST[$fname]))
			$value = $_POST[$fname];
			}
			else if ($source == RCUBE_INPUT_GPC) {
			if (isset($_POST[$fname]))
			$value = $_POST[$fname];
			else if (isset($_GET[$fname]))
			$value = $_GET[$fname];
			else if (isset($_COOKIE[$fname]))
			$value = $_COOKIE[$fname];
			}

			// strip slashes if magic_quotes enabled
			if ((bool)get_magic_quotes_gpc())
			$value = stripslashes($value);
			}

			// remove HTML tags if not allowed
			if (!$allow_html)
			$value = strip_tags($value);

			// convert to internal charset
			if (is_object($OUTPUT))
			return rcube_charset_convert($value, $OUTPUT->get_charset(), $charset);
			else
			return parse_input_value($value, $allow_html, $charset);
			}

			/**
			* Parse/validate input value. See get_input_value()
			* Performs stripslashes() and charset conversion if necessary
			*
			* @param string Input value
			* @param boolean Allow HTML tags in field value
			* @param string Charset to convert into
			* @return string Parsed value
			*/
			function parse_input_value($value, $allow_html=FALSE, $charset=NULL)
			{
			global $OUTPUT;

			if (empty($value))
			return $value;

			if (is_array($value)) {
			foreach ($value as $idx => $val)
			$value[$idx] = parse_input_value($val, $allow_html, $charset);
			return $value;
			}

			// strip single quotes if magic_quotes_sybase is enabled
			if (ini_get('magic_quotes_sybase'))
			$value = str_replace("''", "'", $value);
			// strip slashes if magic_quotes enabled
			else if (get_magic_quotes_gpc() \|\| get_magic_quotes_runtime())
			$value = stripslashes($value);

			// remove HTML tags if not allowed
			if (!$allow_html)
			$value = strip_tags($value);

			$output_charset = is_object($OUTPUT) ? $OUTPUT->get_charset() : null;

			// remove invalid characters (#1488124)
			if ($output_charset == 'UTF-8')
			$value = rc_utf8_clean($value);

			// convert to internal charset
			if ($charset && $output_charset)
			$value = rcube_charset_convert($value, $output_charset, $charset);

			return $value;
			}

			/**
			* Convert array of request parameters (prefixed with _)
			* to a regular array with non-prefixed keys.
			*
			* @param int Source to get value from (GPC)
			* @return array Hash array with all request parameters
			*/
			function request2param($mode = RCUBE_INPUT_GPC, $ignore = 'task\|action')
			{
			$out = array();
			$src = $mode == RCUBE_INPUT_GET ? $_GET : ($mode == RCUBE_INPUT_POST ? $_POST : $_REQUEST);
			foreach ($src as $key => $value) {
			$fname = $key[0] == '_' ? substr($key, 1) : $key;
			if ($ignore && !preg_match('/^(' . $ignore . ')$/', $fname))
			$out[$fname] = get_input_value($key, $mode);
			}

			return $out;
			}

			/**
			* Remove all non-ascii and non-word chars
			* except . and -
			* except ., -, _
			*/
			function asciiwords($str)
			function asciiwords($str, $css_id = false, $replace_with = '')
			{
			return preg_replace('/[^a-z0-9.-_]/i', '', $str);
			$allowed = 'a-z0-9\_\-' . (!$css_id ? '\.' : '');
			return preg_replace("/[^$allowed]/i", $replace_with, $str);
			}

			/**
			* Convert the given string into a valid HTML identifier
			* Same functionality as done in app.js with rcube_webmail.html_identifier()
			*/
			function html_identifier($str, $encode=false)
			{
			if ($encode)
			return rtrim(strtr(base64_encode($str), '+/', '-_'), '=');
			else
			return asciiwords($str, true, '_');
			}

			/**
			@@ -1140,7 +436,7 @@
			*/
			function strip_quotes($str)
			{
			return preg_replace('/[\'"]/', '', $str);
			return str_replace(array("'", '"'), '', $str);
			}


			@@ -1157,32 +453,6 @@


			/**
			* Check if a specific template exists
			*
			* @param string Template name
			* @return boolean True if template exists
			*/
			function template_exists($name)
			{
			global $CONFIG;
			$skin_path = $CONFIG['skin_path'];

			// check template file
			return is_file("$skin_path/templates/$name.html");
			}


			/**
			* Wrapper for rcmail_template::parse()
			* @deprecated
			*/
			function parse_template($name='main', $exit=true)
			{
			$GLOBALS['OUTPUT']->parse($name, $exit);
			}


			/**
			* Create a HTML table based on the given data
			*
			* @param array Named table attributes
			@@ -1192,67 +462,48 @@
			* @return string HTML table code
			*/
			function rcube_table_output($attrib, $table_data, $a_show_cols, $id_col)
			{
			global $DB;

			// allow the following attributes to be added to the <table> tag
			$attrib_str = create_attrib_string($attrib, array('style', 'class', 'id', 'cellpadding', 'cellspacing', 'border', 'summary'));

			$table = '<table' . $attrib_str . ">\n";

			// add table title
			$table .= "<thead><tr>\n";
			{
			global $RCMAIL;

			foreach ($a_show_cols as $col)
			$table .= '<td class="'.$col.'">' . Q(rcube_label($col)) . "</td>\n";
			$table = new html_table(/array('cols' => count($a_show_cols))/);

			$table .= "</tr></thead>\n<tbody>\n";

			// add table header
			if (!$attrib['noheader'])
			foreach ($a_show_cols as $col)
			$table->add_header($col, Q(rcube_label($col)));

			$c = 0;
			if (!is_array($table_data))
			if (!is_array($table_data))
			{
			$db = $RCMAIL->get_dbh();
			while ($table_data && ($sql_arr = $db->fetch_assoc($table_data)))
			{
			while ($table_data && ($sql_arr = $DB->fetch_assoc($table_data)))
			{
			$zebra_class = $c%2 ? 'even' : 'odd';

			$table .= sprintf('<tr id="rcmrow%d" class="contact '.$zebra_class.'">'."\n", $sql_arr[$id_col]);
			$table->add_row(array('id' => 'rcmrow' . html_identifier($sql_arr[$id_col])));

			// format each col
			foreach ($a_show_cols as $col)
			{
			$cont = Q($sql_arr[$col]);
			$table .= '<td class="'.$col.'">' . $cont . "</td>\n";
			}
			$table->add($col, Q($sql_arr[$col]));

			$table .= "</tr>\n";
			$c++;
			}
			}
			else
			{
			foreach ($table_data as $row_data)
			{
			$zebra_class = $c%2 ? 'even' : 'odd';

			$table .= sprintf('<tr id="rcmrow%d" class="contact '.$zebra_class.'">'."\n", $row_data[$id_col]);

			// format each col
			foreach ($a_show_cols as $col)
			{
			$cont = Q($row_data[$col]);
			$table .= '<td class="'.$col.'">' . $cont . "</td>\n";
			}

			$table .= "</tr>\n";
			$c++;
			}
			}

			// complete message table
			$table .= "</tbody></table>\n";

			return $table;
			}
			else {
			foreach ($table_data as $row_data)
			{
			$class = !empty($row_data['class']) ? $row_data['class'] : '';

			$table->add_row(array('id' => 'rcmrow' . html_identifier($row_data[$id_col]), 'class' => $class));

			// format each col
			foreach ($a_show_cols as $col)
			$table->add($col, Q(is_array($row_data[$col]) ? $row_data[$col][0] : $row_data[$col]));

			$c++;
			}
			}

			return $table->show($attrib);
			}


			/**
			@@ -1265,119 +516,138 @@
			* @return string HTML field definition
			*/
			function rcmail_get_edit_field($col, $value, $attrib, $type='text')
			{
			{
			static $colcounts = array();

			$fname = '_'.$col;
			$attrib['name'] = $fname;

			if ($type=='checkbox')
			{
			$attrib['name'] = $fname . ($attrib['array'] ? '[]' : '');
			$attrib['class'] = trim($attrib['class'] . ' ff_' . $col);

			if ($type == 'checkbox') {
			$attrib['value'] = '1';
			$input = new checkbox($attrib);
			}
			else if ($type=='textarea')
			{
			$input = new html_checkbox($attrib);
			}
			else if ($type == 'textarea') {
			$attrib['cols'] = $attrib['size'];
			$input = new textarea($attrib);
			}
			else
			$input = new textfield($attrib);
			$input = new html_textarea($attrib);
			}
			else if ($type == 'select') {
			$input = new html_select($attrib);
			$input->add('---', '');
			$input->add(array_values($attrib['options']), array_keys($attrib['options']));
			}
			else if ($attrib['type'] == 'password') {
			$input = new html_passwordfield($attrib);
			}
			else {
			if ($attrib['type'] != 'text' && $attrib['type'] != 'hidden')
			$attrib['type'] = 'text';
			$input = new html_inputfield($attrib);
			}

			// use value from post
			if (!empty($_POST[$fname]))
			$value = get_input_value($fname, RCUBE_INPUT_POST);
			if (isset($_POST[$fname])) {
			$postvalue = get_input_value($fname, RCUBE_INPUT_POST, true);
			$value = $attrib['array'] ? $postvalue[intval($colcounts[$col]++)] : $postvalue;
			}

			$out = $input->show($value);


			return $out;
			}


			/**
			* Return the mail domain configured for the given host
			*
			* @param string IMAP host
			* @return string Resolved SMTP host
			*/
			function rcmail_mail_domain($host)
			{
			global $CONFIG;

			$domain = $host;
			if (is_array($CONFIG['mail_domain']))
			{
			if (isset($CONFIG['mail_domain'][$host]))
			$domain = $CONFIG['mail_domain'][$host];
			}
			else if (!empty($CONFIG['mail_domain']))
			$domain = $CONFIG['mail_domain'];

			return $domain;
			}
			}


			/**
			* Replace all css definitions with #container [def]
			* and remove css-inlined scripting
			*
			* @param string CSS source code
			* @param string Container ID to use as prefix
			* @return string Modified CSS source
			*/
			function rcmail_mod_css_styles($source, $container_id, $base_url = '')
			function rcmail_mod_css_styles($source, $container_id, $allow_remote=false)
			{
			$a_css_values = array();
			$last_pos = 0;
			$replacements = new rcube_string_replacer;

			// ignore the whole block if evil styles are detected
			$source = rcmail_xss_entity_decode($source);
			$stripped = preg_replace('/[^a-z\(:;]/i', '', $source);
			$evilexpr = 'expression\|behavior\|javascript:\|import[^a]' . (!$allow_remote ? '\|url\(' : '');
			if (preg_match("/$evilexpr/i", $stripped))
			return '/* evil! */';

			// cut out all contents between { and }
			while (($pos = strpos($source, '{', $last_pos)) && ($pos2 = strpos($source, '}', $pos)))
			{
			$key = sizeof($a_css_values);
			$a_css_values[$key] = substr($source, $pos+1, $pos2-($pos+1));
			$source = substr($source, 0, $pos+1) . "<<str_replacement[$key]>>" . substr($source, $pos2, strlen($source)-$pos2);
			while (($pos = strpos($source, '{', $last_pos)) && ($pos2 = strpos($source, '}', $pos))) {
			$styles = substr($source, $pos+1, $pos2-($pos+1));

			// check every line of a style block...
			if ($allow_remote) {
			$a_styles = preg_split('/;[\r\n]*/', $styles, -1, PREG_SPLIT_NO_EMPTY);
			foreach ($a_styles as $line) {
			$stripped = preg_replace('/[^a-z\(:;]/i', '', $line);
			// ... and only allow strict url() values
			if (stripos($stripped, 'url(') && !preg_match('!url\s*$[ "\'](https?:)//[a-z0-9/._+-]+["\' ]$!Uims', $line)) {
			$a_styles = array('/* evil! */');
			break;
			}
			}
			$styles = join(";\n", $a_styles);
			}

			$key = $replacements->add($styles);
			$source = substr($source, 0, $pos+1) . $replacements->get_replacement($key) . substr($source, $pos2, strlen($source)-$pos2);
			$last_pos = $pos+2;
			}

			// remove html commends and add #container to each tag selector.
			// remove html comments and add #container to each tag selector.
			// also replace body definition because we also stripped off the <body> tag
			$styles = preg_replace(
			array(
			'/(^\s<!--)\|(-->\s$)/',
			'/(^\s\|,\s\|\}\s)([a-z0-9\._#][a-z0-9\.\-_])/im',
			'/@import\s+(url$)?[\'"]?([^$\'"]+)[\'"]?(\))?/ime',
			'/<<str_replacement\[([0-9]+)\]>>/e',
			"/$container_id\s+body/i"
			'/(^\s\|,\s\|\}\s)([a-z0-9\._#\][a-z0-9\.\-_]*)/im',
			'/'.preg_quote($container_id, '/').'\s+body/i',
			),
			array(
			'',
			"\\1#$container_id \\2",
			"sprintf(\"@import url('./bin/modcss.php?u=%s&c=%s')\", urlencode(make_absolute_url('\\2','$base_url')), urlencode($container_id))",
			"\$a_css_values[\\1]",
			"$container_id div.rcmBody"
			$container_id,
			),
			$source);

			// put block contents back in
			$styles = $replacements->resolve($styles);

			return $styles;
			}


			/**
			* Try to autodetect operating system and find the correct line endings
			* Decode escaped entities used by known XSS exploits.
			* See http://downloads.securityfocus.com/vulnerabilities/exploits/26800.eml for examples
			*
			* @return string The appropriate mail header delimiter
			* @param string CSS content to decode
			* @return string Decoded string
			*/
			function rcmail_header_delm()
			function rcmail_xss_entity_decode($content)
			{
			global $CONFIG;

			// use the configured delimiter for headers
			if (!empty($CONFIG['mail_header_delimiter']))
			return $CONFIG['mail_header_delimiter'];
			else if (strtolower(substr(PHP_OS, 0, 3)=='win'))
			return "\r\n";
			else if (strtolower(substr(PHP_OS, 0, 3)=='mac'))
			return "\r\n";
			else
			return "\n";
			$out = html_entity_decode(html_entity_decode($content));
			$out = preg_replace_callback('/\\\([0-9a-f]{4})/i', 'rcmail_xss_entity_decode_callback', $out);
			$out = preg_replace('#/\.\*/#Ums', '', $out);
			return $out;
			}


			/**
			* preg_replace_callback callback for rcmail_xss_entity_decode_callback
			*
			* @param array matches result from preg_replace_callback
			* @return string decoded entity
			*/
			function rcmail_xss_entity_decode_callback($matches)
			{
			return chr(hexdec($matches[1]));
			}

			/**
			* Compose a valid attribute string for HTML tags
			@@ -1407,195 +677,187 @@
			function parse_attrib_string($str)
			{
			$attrib = array();
			preg_match_all('/\s*([-_a-z]+)=(["\'])([^"]+)\2/Ui', stripslashes($str), $regs, PREG_SET_ORDER);
			preg_match_all('/\s([-_a-z]+)=(["\'])??(?(2)([^\2])\2\|(\S+?))/Ui', stripslashes($str), $regs, PREG_SET_ORDER);

			// convert attributes to an associative array (name => value)
			if ($regs)
			foreach ($regs as $attr)
			$attrib[strtolower($attr[1])] = $attr[3];
			if ($regs) {
			foreach ($regs as $attr) {
			$attrib[strtolower($attr[1])] = html_entity_decode($attr[3] . $attr[4]);
			}
			}

			return $attrib;
			}


			/**
			* Improved equivalent to strtotime()
			*
			* @param string Date string
			* @return int
			*/
			function rcube_strtotime($date)
			{
			// check for MS Outlook vCard date format YYYYMMDD
			if (preg_match('/^([12][90]\d\d)([01]\d)(\d\d)$/', trim($date), $matches)) {
			return mktime(0,0,0, intval($matches[2]), intval($matches[3]), intval($matches[1]));
			}
			else if (is_numeric($date))
			return $date;

			// support non-standard "GMTXXXX" literal
			$date = preg_replace('/GMT\s*([+-][0-9]+)/', '\\1', $date);

			// if date parsing fails, we have a date in non-rfc format.
			// remove token from the end and try again
			while ((($ts = @strtotime($date)) === false) \|\| ($ts < 0)) {
			$d = explode(' ', $date);
			array_pop($d);
			if (!$d) break;
			$date = implode(' ', $d);
			}

			return $ts;
			}


			/**
			* Convert the given date to a human readable form
			* This uses the date formatting properties from config
			*
			* @param mixed Date representation (string or timestamp)
			* @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
			*/
			function format_date($date, $format=NULL)
			{
			global $CONFIG, $sess_user_lang;

			$ts = NULL;

			if (is_numeric($date))
			$ts = $date;
			else if (!empty($date))
			$ts = @strtotime($date);

			if (empty($ts))
			return '';

			// get user's timezone
			$tz = $CONFIG['timezone'];
			if ($CONFIG['dst_active'])
			$tz++;
			function format_date($date, $format=NULL, $convert=true)
			{
			global $RCMAIL, $CONFIG;

			// convert time to user's timezone
			$timestamp = $ts - date('Z', $ts) + ($tz * 3600);

			// get current timestamp in user's timezone
			$now = time(); // local time
			$now -= (int)date('Z'); // make GMT time
			$now += ($tz * 3600); // user's time
			$now_date = getdate($now);
			if (is_object($date) && is_a($date, 'DateTime')) {
			$timestamp = $date->format('U');
			}
			else {
			if (!empty($date))
			$timestamp = rcube_strtotime($date);

			$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, $now_date['year']);
			if (empty($timestamp))
			return '';

			// define date format depending on current time
			if ($CONFIG['prettydate'] && !$format && $timestamp > $today_limit && $timestamp < $now)
			return sprintf('%s %s', rcube_label('today'), date($CONFIG['date_today'] ? $CONFIG['date_today'] : 'H:i', $timestamp));
			else if ($CONFIG['prettydate'] && !$format && $timestamp > $week_limit && $timestamp < $now)
			$format = $CONFIG['date_short'] ? $CONFIG['date_short'] : 'D H:i';
			else if (!$format)
			$format = $CONFIG['date_long'] ? $CONFIG['date_long'] : 'd.m.Y H:i';
			try {
			$date = new DateTime("@".$timestamp);
			}
			catch (Exception $e) {
			return '';
			}
			}

			if ($convert) {
			try {
			// convert to the right timezone
			$stz = date_default_timezone_get();
			$tz = new DateTimeZone($RCMAIL->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']);

			if ($CONFIG['prettydate'] && $timestamp > $today_limit && $timestamp < $now) {
			$format = $RCMAIL->config->get('date_today', $RCMAIL->config->get('time_format', 'H:i'));
			$today = true;
			}
			else if ($CONFIG['prettydate'] && $timestamp > $week_limit && $timestamp < $now)
			$format = $RCMAIL->config->get('date_short', 'D H:i');
			else
			$format = $RCMAIL->config->get('date_long', 'Y-m-d H:i');
			}

			// strftime() format
			if (preg_match('/%[a-z]+/i', $format)) {
			$format = strftime($format, $timestamp);

			if ($convert && $stz) {
			date_default_timezone_set($stz);
			}

			return $today ? (rcube_label('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{$i}=='\\') // skip escape chars
			for ($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};
			if ($format[$i]==' ' \|\| $format{$i-1}=='\\')
			$out .= $format[$i];
			// weekday (short)
			else if ($format{$i}=='D')
			else if ($format[$i]=='D')
			$out .= rcube_label(strtolower(date('D', $timestamp)));
			// weekday long
			else if ($format{$i}=='l')
			else if ($format[$i]=='l')
			$out .= rcube_label(strtolower(date('l', $timestamp)));
			// month name (short)
			else if ($format{$i}=='M')
			else if ($format[$i]=='M')
			$out .= rcube_label(strtolower(date('M', $timestamp)));
			// month name (long)
			else if ($format{$i}=='F')
			$out .= rcube_label(strtolower(date('F', $timestamp)));
			else if ($format[$i]=='F')
			$out .= rcube_label('long'.strtolower(date('M', $timestamp)));
			else if ($format[$i]=='x')
			$out .= strftime('%x %X', $timestamp);
			else
			$out .= date($format{$i}, $timestamp);
			}

			return $out;
			$out .= date($format[$i], $timestamp);
			}

			if ($today) {
			$label = rcube_label('today');
			// replcae $ character with "Today" label (#1486120)
			if (strpos($out, '$') !== false) {
			$out = preg_replace('/\$/', $label, $out, 1);
			}
			else {
			$out = $label . ' ' . $out;
			}
			}

			if ($convert && $stz) {
			date_default_timezone_set($stz);
			}

			return $out;
			}


			/**
			* Compose a valid representaion of name and e-mail address
			* Compose a valid representation of name and e-mail address
			*
			* @param string E-mail address
			* @param string Person name
			* @return string Formatted string
			*/
			function format_email_recipient($email, $name='')
			{
			if ($name && $name != $email)
			return sprintf('%s <%s>', strpos($name, ",") ? '"'.$name.'"' : $name, $email);
			else
			return $email;
			{
			if ($name && $name != $email) {
			// Special chars as defined by RFC 822 need to in quoted string (or escaped).
			return sprintf('%s <%s>', preg_match('/[\<\>\\\.\[\]@,;:"]/', $name) ? '"'.addcslashes($name, '"').'"' : $name, trim($email));
			}



			/**** debugging functions ******/


			/**
			* Print or write debug messages
			*
			* @param mixed Debug message or data
			*/
			function console($msg)
			{
			if (!is_string($msg))
			$msg = var_export($msg, true);

			if (!($GLOBALS['CONFIG']['debug_level'] & 4))
			write_log('console', $msg);
			else if ($GLOBALS['REMOTE_REQUEST'])
			print "/\n $msg \n/\n";
			else
			{
			print '<div style="background:#eee; border:1px solid #ccc; margin-bottom:3px; padding:6px"><pre>';
			print $msg;
			print "</pre></div>\n";
			}
			}


			/**
			* Append a line to a logfile in the logs directory.
			* Date will be added automatically to the line.
			*
			* @param $name Name of logfile
			* @param $line Line to append
			*/
			function write_log($name, $line)
			{
			global $CONFIG, $INSTALL_PATH;

			if (!is_string($line))
			$line = var_export($line, true);

			$log_entry = sprintf("[%s]: %s\n",
			date("d-M-Y H:i:s O", mktime()),
			$line);

			if (empty($CONFIG['log_dir']))
			$CONFIG['log_dir'] = $INSTALL_PATH.'logs';

			// try to open specific log file for writing
			if ($fp = @fopen($CONFIG['log_dir'].'/'.$name, 'a'))
			{
			fwrite($fp, $log_entry);
			fclose($fp);
			}
			}


			/**
			* @access private
			*/
			function rcube_timer()
			{
			list($usec, $sec) = explode(" ", microtime());
			return ((float)$usec + (float)$sec);
			}


			/**
			* @access private
			*/
			function rcube_print_time($timer, $label='Timer')
			{
			static $print_count = 0;

			$print_count++;
			$now = rcube_timer();
			$diff = $now-$timer;

			if (empty($label))
			$label = 'Timer '.$print_count;

			console(sprintf("%s: %0.4f sec", $label, $diff));
			}
			return trim($email);
			}


			/**
			@@ -1605,242 +867,319 @@
			* @return string HTML code for the gui object
			*/
			function rcmail_mailbox_list($attrib)
			{
			global $IMAP, $CONFIG, $OUTPUT, $COMM_PATH;
			static $s_added_script = FALSE;
			{
			global $RCMAIL;
			static $a_mailboxes;

			$attrib += array('maxlength' => 100, 'realnames' => false, 'unreadwrap' => ' (%s)');

			// add some labels to client
			rcube_add_label('purgefolderconfirm');
			rcube_add_label('deletemessagesconfirm');

			// $mboxlist_start = rcube_timer();

			$RCMAIL->output->add_label('purgefolderconfirm', 'deletemessagesconfirm');

			$type = $attrib['type'] ? $attrib['type'] : 'ul';
			$add_attrib = $type=='select' ? array('style', 'class', 'id', 'name', 'onchange') :
			array('style', 'class', 'id');

			unset($attrib['type']);

			if ($type=='ul' && !$attrib['id'])
			$attrib['id'] = 'rcmboxlist';

			// allow the following attributes to be added to the <ul> tag
			$attrib_str = create_attrib_string($attrib, $add_attrib);

			$out = '<' . $type . $attrib_str . ">\n";

			// add no-selection option
			if ($type=='select' && $attrib['noselection'])
			$out .= sprintf('<option value="0">%s</option>'."\n",
			rcube_label($attrib['noselection']));

			// get mailbox list
			$mbox_name = $IMAP->get_mailbox_name();

			// build the folders tree
			if (empty($a_mailboxes))
			{
			// get mailbox list
			$a_folders = $IMAP->list_mailboxes();
			$delimiter = $IMAP->get_hierarchy_delimiter();
			$a_mailboxes = array();
			if (empty($attrib['folder_name']))
			$attrib['folder_name'] = '*';

			// rcube_print_time($mboxlist_start, 'list_mailboxes()');
			// get mailbox list
			$mbox_name = $RCMAIL->storage->get_folder();

			// build the folders tree
			if (empty($a_mailboxes)) {
			// get mailbox list
			$a_folders = $RCMAIL->storage->list_folders_subscribed('', $attrib['folder_name'], $attrib['folder_filter']);
			$delimiter = $RCMAIL->storage->get_hierarchy_delimiter();
			$a_mailboxes = array();

			foreach ($a_folders as $folder)
			rcmail_build_folder_tree($a_mailboxes, $folder, $delimiter);
			}

			// var_dump($a_mailboxes);

			if ($type=='select')
			$out .= rcmail_render_folder_tree_select($a_mailboxes, $mbox_name, $attrib['maxlength']);
			else
			$out .= rcmail_render_folder_tree_html($a_mailboxes, $mbox_name, $attrib['maxlength']);

			// rcube_print_time($mboxlist_start, 'render_folder_tree()');


			if ($type=='ul')
			$OUTPUT->add_gui_object('mailboxlist', $attrib['id']);

			return $out . "</$type>";
			}

			// 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') {
			$select = new html_select($attrib);

			// add no-selection option
			if ($attrib['noselection'])
			$select->add(rcube_label($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();
			$out = html::tag('ul', $attrib, rcmail_render_folder_tree_html($a_mailboxes, $mbox_name, $js_mailboxlist, $attrib), html::$common_attrib);

			$RCMAIL->output->add_gui_object('mailboxlist', $attrib['id']);
			$RCMAIL->output->set_env('mailboxes', $js_mailboxlist);
			$RCMAIL->output->set_env('unreadwrap', $attrib['unreadwrap']);
			$RCMAIL->output->set_env('collapsed_folders', (string)$RCMAIL->config->get('collapsed_folders'));
			}

			return $out;
			}


			/**
			* Return the mailboxlist as html_select object
			*
			* @param array Named parameters
			* @return html_select HTML drop-down object
			*/
			function rcmail_mailbox_select($p = array())
			{
			global $RCMAIL;

			$p += array('maxlength' => 100, 'realnames' => false);
			$a_mailboxes = array();
			$storage = $RCMAIL->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();

			foreach ($list as $folder) {
			if (empty($p['exceptions']) \|\| !in_array($folder, $p['exceptions']))
			rcmail_build_folder_tree($a_mailboxes, $folder, $delimiter);
			}

			$select = new html_select($p);

			if ($p['noselection'])
			$select->add($p['noselection'], '');

			rcmail_render_folder_tree_select($a_mailboxes, $mbox, $p['maxlength'], $select, $p['realnames'], 0, $p);

			return $select;
			}


			/**
			* Create a hierarchical array of the mailbox list
			* @access private
			* @return void
			*/
			function rcmail_build_folder_tree(&$arrFolders, $folder, $delm='/', $path='')
			{
			{
			global $RCMAIL;

			// Handle namespace prefix
			$prefix = '';
			if (!$path) {
			$n_folder = $folder;
			$folder = $RCMAIL->storage->mod_folder($folder);

			if ($n_folder != $folder) {
			$prefix = substr($n_folder, 0, -strlen($folder));
			}
			}

			$pos = strpos($folder, $delm);
			if ($pos !== false)
			{

			if ($pos !== false) {
			$subFolders = substr($folder, $pos+1);
			$currentFolder = substr($folder, 0, $pos);
			}
			else
			{

			// 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;
			}

			$path .= $currentFolder;

			if (!isset($arrFolders[$currentFolder]))
			{
			$arrFolders[$currentFolder] = array('id' => $path,
			'name' => rcube_charset_convert($currentFolder, 'UTF-7'),
			'folders' => array());
			}

			if (!empty($subFolders))
			rcmail_build_folder_tree($arrFolders[$currentFolder]['folders'], $subFolders, $delm, $path.$delm);
			$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($subFolders))
			rcmail_build_folder_tree($arrFolders[$currentFolder]['folders'], $subFolders, $delm, $path.$delm);
			}


			/**
			* Return html for a structured list <ul> for the mailbox tree
			* @access private
			* @return string
			*/
			function rcmail_render_folder_tree_html(&$arrFolders, &$mbox_name, $maxlength, $nestLevel=0)
			{
			global $COMM_PATH, $IMAP, $CONFIG, $OUTPUT;
			function rcmail_render_folder_tree_html(&$arrFolders, &$mbox_name, &$jslist, $attrib, $nestLevel=0)
			{
			global $RCMAIL, $CONFIG;

			$idx = 0;
			$maxlength = intval($attrib['maxlength']);
			$realnames = (bool)$attrib['realnames'];
			$msgcounts = $RCMAIL->storage->get_cache('messagecount');

			$out = '';
			foreach ($arrFolders as $key => $folder)
			{
			$zebra_class = ($nestLevel*$idx)%2 ? 'even' : 'odd';
			$title = '';
			foreach ($arrFolders as $key => $folder) {
			$title = null;
			$folder_class = rcmail_folder_classname($folder['id']);
			$collapsed = strpos($CONFIG['collapsed_folders'], '&'.rawurlencode($folder['id']).'&') !== false;
			$unread = $msgcounts ? intval($msgcounts[$folder['id']]['UNSEEN']) : 0;

			if ($folder_class = rcmail_folder_classname($folder['id']))
			if ($folder_class && !$realnames) {
			$foldername = rcube_label($folder_class);
			else
			{
			}
			else {
			$foldername = $folder['name'];

			// shorten the folder name to a given length
			if ($maxlength && $maxlength>1)
			{
			if ($maxlength && $maxlength > 1) {
			$fname = abbreviate_string($foldername, $maxlength);
			if ($fname != $foldername)
			$title = ' title="'.Q($foldername).'"';
			$title = $foldername;
			$foldername = $fname;
			}
			}

			// add unread message count display
			if ($unread_count = $IMAP->messagecount($folder['id'], 'RECENT', ($folder['id']==$mbox_name)))
			$foldername .= sprintf(' (%d)', $unread_count);

			// make folder name safe for ids and class names
			$folder_id = preg_replace('/[^A-Za-z0-9\-_]/', '', $folder['id']);
			$class_name = preg_replace('/[^a-z0-9\-_]/', '', $folder_class ? $folder_class : strtolower($folder['id']));

			// set special class for Sent, Drafts, Trash and Junk
			if ($folder['id']==$CONFIG['sent_mbox'])
			$class_name = 'sent';
			else if ($folder['id']==$CONFIG['drafts_mbox'])
			$class_name = 'drafts';
			else if ($folder['id']==$CONFIG['trash_mbox'])
			$class_name = 'trash';
			else if ($folder['id']==$CONFIG['junk_mbox'])
			$class_name = 'junk';

			$js_name = htmlspecialchars(JQ($folder['id']));
			$out .= sprintf('<li id="rcmli%s" class="mailbox %s %s%s%s"><a href="%s"'.
			' onclick="return %s.command(\'list\',\'%s\',this)"'.
			' onmouseover="return %s.focus_folder(\'%s\')"' .
			' onmouseout="return %s.unfocus_folder(\'%s\')"' .
			' onmouseup="return %s.folder_mouse_up(\'%s\')"%s>%s</a>',
			$folder_id,
			$class_name,
			$zebra_class,
			$unread_count ? ' unread' : '',
			$folder['id']==$mbox_name ? ' selected' : '',
			Q(rcmail_url('', array('_mbox' => $folder['id']))),
			JS_OBJECT_NAME,
			$js_name,
			JS_OBJECT_NAME,
			$js_name,
			JS_OBJECT_NAME,
			$js_name,
			JS_OBJECT_NAME,
			$js_name,
			$title,
			Q($foldername));

			if (!empty($folder['folders']))
			$out .= "\n<ul>\n" . rcmail_render_folder_tree_html($folder['folders'], $mbox_name, $maxlength, $nestLevel+1) . "</ul>\n";

			$out .= "</li>\n";
			$idx++;
			}

			return $out;
			// make folder name safe for ids and class names
			$folder_id = html_identifier($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';

			$js_name = JQ($folder['id']);
			$html_name = Q($foldername) . ($unread ? html::span('unreadcount', sprintf($attrib['unreadwrap'], $unread)) : '');
			$link_attrib = $folder['virtual'] ? array() : array(
			'href' => rcmail_url('', array('_mbox' => $folder['id'])),
			'onclick' => sprintf("return %s.command('list','%s',this)", 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, $html_name) .
			(!empty($folder['folders']) ? html::div(array(
			'class' => ($collapsed ? 'collapsed' : 'expanded'),
			'style' => "position:absolute",
			'onclick' => sprintf("%s.command('collapse-folder', '%s')", JS_OBJECT_NAME, $js_name)
			), ' ') : ''));

			$jslist[$folder_id] = array('id' => $folder['id'], 'name' => $foldername, 'virtual' => $folder['virtual']);

			if (!empty($folder['folders'])) {
			$out .= html::tag('ul', array('style' => ($collapsed ? "display:none;" : null)),
			rcmail_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
			* @access private
			* @return string
			*/
			function rcmail_render_folder_tree_select(&$arrFolders, &$mbox_name, $maxlength, $nestLevel=0)
			{
			global $IMAP, $OUTPUT;
			function rcmail_render_folder_tree_select(&$arrFolders, &$mbox_name, $maxlength, &$select, $realnames=false, $nestLevel=0, $opts=array())
			{
			global $RCMAIL;

			$idx = 0;
			$out = '';
			foreach ($arrFolders as $key=>$folder)
			{
			if ($folder_class = rcmail_folder_classname($folder['id']))

			foreach ($arrFolders as $key => $folder) {
			// skip exceptions (and its subfolders)
			if (!empty($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 = $RCMAIL->storage->folder_attributes($folder['id']))
			&& in_array('\\Noinferiors', $attrs)
			) {
			continue;
			}

			if (!$realnames && ($folder_class = rcmail_folder_classname($folder['id'])))
			$foldername = rcube_label($folder_class);
			else
			{
			else {
			$foldername = $folder['name'];


			// shorten the folder name to a given length
			if ($maxlength && $maxlength>1)
			$foldername = abbreviate_string($foldername, $maxlength);
			}

			$out .= sprintf('<option value="%s">%s%s</option>'."\n",
			htmlspecialchars($folder['id']),
			str_repeat(' ', $nestLevel*4),
			Q($foldername));

			if (!empty($folder['folders']))
			$out .= rcmail_render_folder_tree_select($folder['folders'], $mbox_name, $maxlength, $nestLevel+1);

			$idx++;
			}

			return $out;
			$select->add(str_repeat(' ', $nestLevel*4) . $foldername, $folder['id']);

			if (!empty($folder['folders']))
			$out .= rcmail_render_folder_tree_select($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
			* @access private
			* @return string
			*/
			function rcmail_folder_classname($folder_id)
			{
			global $CONFIG;

			$cname = null;
			$folder_lc = strtolower($folder_id);

			if ($folder_id == 'INBOX')
			return 'inbox';

			// for these mailboxes we have localized labels and css classes
			foreach (array('inbox', 'sent', 'drafts', 'trash', 'junk') as $smbx)
			foreach (array('sent', 'drafts', 'trash', 'junk') as $smbx)
			{
			if ($folder_lc == $smbx \|\| $folder_id == $CONFIG[$smbx.'_mbox'])
			$cname = $smbx;
			if ($folder_id == $CONFIG[$smbx.'_mbox'])
			return $smbx;
			}

			return $cname;
			}


			@@ -1856,8 +1195,1052 @@
			if ($folder_class = rcmail_folder_classname($name))
			return rcube_label($folder_class);
			else
			return rcube_charset_convert($name, 'UTF-7');
			return rcube_charset_convert($name, 'UTF7-IMAP');
			}


			?>
			function rcmail_localize_folderpath($path)
			{
			global $RCMAIL;

			$protect_folders = $RCMAIL->config->get('protect_default_folders');
			$default_folders = (array) $RCMAIL->config->get('default_folders');
			$delimiter = $RCMAIL->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 && in_array($directory, $default_folders)) {
			unset($result);
			$result[] = rcmail_localize_foldername($directory);
			}
			else {
			$result[] = rcube_charset_convert($dir, 'UTF7-IMAP');
			}
			}

			return implode($delimiter, $result);
			}


			function rcmail_quota_display($attrib)
			{
			global $OUTPUT;

			if (!$attrib['id'])
			$attrib['id'] = 'rcmquotadisplay';

			$_SESSION['quota_display'] = !empty($attrib['display']) ? $attrib['display'] : 'text';

			$OUTPUT->add_gui_object('quotadisplay', $attrib['id']);

			$quota = rcmail_quota_content($attrib);

			$OUTPUT->add_script('rcmail.set_quota('.json_serialize($quota).');', 'docready');

			return html::span($attrib, '');
			}


			function rcmail_quota_content($attrib=NULL)
			{
			global $RCMAIL;

			$quota = $RCMAIL->storage->get_quota();
			$quota = $RCMAIL->plugins->exec_hook('quota', $quota);

			$quota_result = (array) $quota;
			$quota_result['type'] = isset($_SESSION['quota_display']) ? $_SESSION['quota_display'] : '';

			if (!$quota['total'] && $RCMAIL->config->get('quota_zero_as_unlimited')) {
			$quota_result['title'] = rcube_label('unlimited');
			$quota_result['percent'] = 0;
			}
			else if ($quota['total']) {
			if (!isset($quota['percent']))
			$quota_result['percent'] = min(100, round(($quota['used']/max(1,$quota['total']))*100));

			$title = sprintf('%s / %s (%.0f%%)',
			show_bytes($quota['used'] * 1024), 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 {
			$quota_result['title'] = rcube_label('unknown');
			$quota_result['percent'] = 0;
			}

			return $quota_result;
			}


			/**
			* Outputs error message according to server error/response codes
			*
			* @param string Fallback message label
			* @param string Fallback message label arguments
			*
			* @return void
			*/
			function rcmail_display_server_error($fallback=null, $fallback_args=null)
			{
			global $RCMAIL;

			$err_code = $RCMAIL->storage->get_error_code();
			$res_code = $RCMAIL->storage->get_response_code();

			if ($err_code < 0) {
			$RCMAIL->output->show_message('storageerror', 'error');
			}
			else if ($res_code == rcube_storage::NOPERM) {
			$RCMAIL->output->show_message('errornoperm', 'error');
			}
			else if ($res_code == rcube_storage::READONLY) {
			$RCMAIL->output->show_message('errorreadonly', 'error');
			}
			else if ($err_code && ($err_str = $RCMAIL->storage->get_error_str())) {
			// try to detect access rights problem and display appropriate message
			if (stripos($err_str, 'Permission denied') !== false)
			$RCMAIL->output->show_message('errornoperm', 'error');
			else
			$RCMAIL->output->show_message('servererrormsg', 'error', array('msg' => $err_str));
			}
			else if ($fallback) {
			$RCMAIL->output->show_message($fallback, 'error', $fallback_args);
			}

			return true;
			}


			/**
			* Generate CSS classes from mimetype and filename extension
			*
			* @param string Mimetype
			* @param string The filename
			* @return string CSS classes separated by space
			*/
			function rcmail_filetype2classname($mimetype, $filename)
			{
			list($primary, $secondary) = explode('/', $mimetype);

			$classes = array($primary ? $primary : 'unknown');
			if ($secondary) {
			$classes[] = $secondary;
			}
			if (preg_match('/\.([a-z0-9]+)$/i', $filename, $m)) {
			$classes[] = $m[1];
			}

			return strtolower(join(" ", $classes));
			}

			/**
			* Output HTML editor scripts
			*
			* @param string Editor mode
			* @return void
			*/
			function rcube_html_editor($mode='')
			{
			global $RCMAIL;

			$hook = $RCMAIL->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';

			$RCMAIL->output->include_script('tiny_mce/tiny_mce.js');
			$RCMAIL->output->include_script('editor.js');
			$RCMAIL->output->add_script(sprintf("rcmail_editor_init(%s)",
			json_encode(array(
			'mode' => $mode,
			'lang' => $lang,
			'skin_path' => $RCMAIL->output->get_skin_path(),
			'spellcheck' => intval($RCMAIL->config->get('enable_spellcheck')),
			'spelldict' => intval($RCMAIL->config->get('spellcheck_dictionary')),
			))), 'docready');
			}


			/**
			* Replaces TinyMCE's emoticon images with plain-text representation
			*
			* @param string HTML content
			* @return string HTML content
			*/
			function rcmail_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);
			}


			/**
			* Send the given message using the configured method
			*
			* @param object $message Reference to Mail_MIME object
			* @param string $from Sender address string
			* @param array $mailto Array of recipient address strings
			* @param array $smtp_error SMTP error array (reference)
			* @param string $body_file Location of file with saved message body (reference),
			* used when delay_file_io is enabled
			* @param array $smtp_opts SMTP options (e.g. DSN request)
			*
			* @return boolean Send status.
			*/
			function rcmail_deliver_message(&$message, $from, $mailto, &$smtp_error, &$body_file=null, $smtp_opts=null)
			{
			global $CONFIG, $RCMAIL;

			$headers = $message->headers();

			// send thru SMTP server using custom SMTP library
			if ($CONFIG['smtp_server']) {
			// generate list of recipients
			$a_recipients = array($mailto);

			if (strlen($headers['Cc']))
			$a_recipients[] = $headers['Cc'];
			if (strlen($headers['Bcc']))
			$a_recipients[] = $headers['Bcc'];

			// clean Bcc from header for recipients
			$send_headers = $headers;
			unset($send_headers['Bcc']);
			// here too, it because txtHeaders() below use $message->_headers not only $send_headers
			unset($message->_headers['Bcc']);

			$smtp_headers = $message->txtHeaders($send_headers, true);

			if ($message->getParam('delay_file_io')) {
			// use common temp dir
			$temp_dir = $RCMAIL->config->get('temp_dir');
			$body_file = tempnam($temp_dir, 'rcmMsg');
			if (PEAR::isError($mime_result = $message->saveMessageBody($body_file))) {
			raise_error(array('code' => 650, 'type' => 'php',
			'file' => __FILE__, 'line' => __LINE__,
			'message' => "Could not create message: ".$mime_result->getMessage()),
			TRUE, FALSE);
			return false;
			}
			$msg_body = fopen($body_file, 'r');
			} else {
			$msg_body = $message->get();
			}

			// send message
			if (!is_object($RCMAIL->smtp))
			$RCMAIL->smtp_init(true);

			$sent = $RCMAIL->smtp->send_mail($from, $a_recipients, $smtp_headers, $msg_body, $smtp_opts);
			$smtp_response = $RCMAIL->smtp->get_response();
			$smtp_error = $RCMAIL->smtp->get_error();

			// log error
			if (!$sent)
			raise_error(array('code' => 800, 'type' => 'smtp', 'line' => __LINE__, 'file' => __FILE__,
			'message' => "SMTP error: ".join("\n", $smtp_response)), TRUE, FALSE);
			}
			// send mail using PHP's mail() function
			else {
			// unset some headers because they will be added by the mail() function
			$headers_enc = $message->headers($headers);
			$headers_php = $message->_headers;
			unset($headers_php['To'], $headers_php['Subject']);

			// reset stored headers and overwrite
			$message->_headers = array();
			$header_str = $message->txtHeaders($headers_php);

			// #1485779
			if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
			if (preg_match_all('/<([^@]+@[^>]+)>/', $headers_enc['To'], $m)) {
			$headers_enc['To'] = implode(', ', $m[1]);
			}
			}

			$msg_body = $message->get();

			if (PEAR::isError($msg_body))
			raise_error(array('code' => 650, 'type' => 'php',
			'file' => __FILE__, 'line' => __LINE__,
			'message' => "Could not create message: ".$msg_body->getMessage()),
			TRUE, FALSE);
			else {
			$delim = $RCMAIL->config->header_delimiter();
			$to = $headers_enc['To'];
			$subject = $headers_enc['Subject'];
			$header_str = rtrim($header_str);

			if ($delim != "\r\n") {
			$header_str = str_replace("\r\n", $delim, $header_str);
			$msg_body = str_replace("\r\n", $delim, $msg_body);
			$to = str_replace("\r\n", $delim, $to);
			$subject = str_replace("\r\n", $delim, $subject);
			}

			if (ini_get('safe_mode'))
			$sent = mail($to, $subject, $msg_body, $header_str);
			else
			$sent = mail($to, $subject, $msg_body, $header_str, "-f$from");
			}
			}

			if ($sent) {
			$RCMAIL->plugins->exec_hook('message_sent', array('headers' => $headers, 'body' => $msg_body));

			// remove MDN headers after sending
			unset($headers['Return-Receipt-To'], $headers['Disposition-Notification-To']);

			// get all recipients
			if ($headers['Cc'])
			$mailto .= $headers['Cc'];
			if ($headers['Bcc'])
			$mailto .= $headers['Bcc'];
			if (preg_match_all('/<([^@]+@[^>]+)>/', $mailto, $m))
			$mailto = implode(', ', array_unique($m[1]));

			if ($CONFIG['smtp_log']) {
			write_log('sendmail', sprintf("User %s [%s]; Message for %s; %s",
			$RCMAIL->user->get_username(),
			$_SERVER['REMOTE_ADDR'],
			$mailto,
			!empty($smtp_response) ? join('; ', $smtp_response) : ''));
			}
			}

			if (is_resource($msg_body)) {
			fclose($msg_body);
			}

			$message->_headers = array();
			$message->headers($headers);

			return $sent;
			}


			// Returns unique Message-ID
			function rcmail_gen_message_id()
			{
			global $RCMAIL;

			$local_part = md5(uniqid('rcmail'.mt_rand(),true));
			$domain_part = $RCMAIL->user->get_username('domain');

			// Try to find FQDN, some spamfilters doesn't like 'localhost' (#1486924)
			if (!preg_match('/\.[a-z]+$/i', $domain_part)) {
			if (($host = preg_replace('/:[0-9]+$/', '', $_SERVER['HTTP_HOST']))
			&& preg_match('/\.[a-z]+$/i', $host)) {
			$domain_part = $host;
			}
			else if (($host = preg_replace('/:[0-9]+$/', '', $_SERVER['SERVER_NAME']))
			&& preg_match('/\.[a-z]+$/i', $host)) {
			$domain_part = $host;
			}
			}

			return sprintf('<%s@%s>', $local_part, $domain_part);
			}


			// Returns RFC2822 formatted current date in user's timezone
			function rcmail_user_date()
			{
			global $RCMAIL;

			// get user's timezone
			try {
			$tz = new DateTimeZone($RCMAIL->config->get('timezone'));
			$date = new DateTime('now', $tz);
			}
			catch (Exception $e) {
			$date = new DateTime();
			}

			return $date->format('r');
			}


			/**
			* Check if we can process not exceeding memory_limit
			*
			* @param integer Required amount of memory
			* @return boolean
			*/
			function rcmail_mem_check($need)
			{
			$mem_limit = parse_bytes(ini_get('memory_limit'));
			$memory = function_exists('memory_get_usage') ? memory_get_usage() : 1610241024; // safe value: 16MB

			return $mem_limit > 0 && $memory + $need > $mem_limit ? false : true;
			}


			/**
			* Check if working in SSL mode
			*
			* @param integer HTTPS port number
			* @param boolean Enables 'use_https' option checking
			* @return boolean
			*/
			function rcube_https_check($port=null, $use_https=true)
			{
			global $RCMAIL;

			if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off')
			return true;
			if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https')
			return true;
			if ($port && $_SERVER['SERVER_PORT'] == $port)
			return true;
			if ($use_https && isset($RCMAIL) && $RCMAIL->config->get('use_https'))
			return true;

			return false;
			}


			/**
			* For backward compatibility.
			*
			* @global rcmail $RCMAIL
			* @param string $var_name Variable name.
			* @return void
			*/
			function rcube_sess_unset($var_name=null)
			{
			global $RCMAIL;

			$RCMAIL->session->remove($var_name);
			}


			/**
			* Replaces hostname variables
			*
			* @param string $name Hostname
			* @param string $host Optional IMAP hostname
			* @return string
			*/
			function rcube_parse_host($name, $host='')
			{
			// %n - host
			$n = preg_replace('/:\d+$/', '', $_SERVER['SERVER_NAME']);
			// %d - domain name without first part, e.g. %n=mail.domain.tld, %d=domain.tld
			$d = preg_replace('/^[^\.]+\./', '', $n);
			// %h - IMAP host
			$h = $_SESSION['storage_host'] ? $_SESSION['storage_host'] : $host;
			// %z - IMAP domain without first part, e.g. %h=imap.domain.tld, %z=domain.tld
			$z = preg_replace('/^[^\.]+\./', '', $h);
			// %s - domain name after the '@' from e-mail address provided at login screen. Returns FALSE if an invalid email is provided
			if ( strpos($name, '%s') !== false ){
			$user_email = rcube_idn_convert(get_input_value('_user', RCUBE_INPUT_POST), true);
			if ( preg_match('/(.*)@([a-z0-9\.\-\[\]\:]+)/i', $user_email, $s) < 1 \|\| filter_var($s[1]."@".$s[2], FILTER_VALIDATE_EMAIL) === false )
			return false;
			}

			$name = str_replace(array('%n', '%d', '%h', '%z', '%s'), array($n, $d, $h, $z, $s[2]), $name);
			return $name;
			}


			/**
			* E-mail address validation
			*
			* @param string $email Email address
			* @param boolean $dns_check True to check dns
			* @return boolean
			*/
			function check_email($email, $dns_check=true)
			{
			// Check for invalid characters
			if (preg_match('/[\x00-\x1F\x7F-\xFF]/', $email))
			return false;

			// Check for length limit specified by RFC 5321 (#1486453)
			if (strlen($email) > 254)
			return false;

			$email_array = explode('@', $email);

			// Check that there's one @ symbol
			if (count($email_array) < 2)
			return false;

			$domain_part = array_pop($email_array);
			$local_part = implode('@', $email_array);

			// from PEAR::Validate
			$regexp = '&^(?:
			("\s(?:[^"\f\n\r\t\v\b\s]+\s)+")\| #1 quoted name
			([-\w!\#\$%\&\'+~/^`\|{}=]+(?:\.[-\w!\#\$%\&\'+~/^`\|{}=]+)*)) #2 OR dot-atom (RFC5322)
			$&xi';

			if (!preg_match($regexp, $local_part))
			return false;

			// Check domain part
			if (preg_match('/^\[(25[0-5]\|2[0-4][0-9]\|1[0-9][0-9]\|[1-9]?[0-9])(\.(25[0-5]\|2[0-4][0-9]\|1[0-9][0-9]\|[1-9]?[0-9])){3}\]$/', $domain_part))
			return true; // IP address
			else {
			// If not an IP address
			$domain_array = explode('.', $domain_part);
			if (sizeof($domain_array) < 2)
			return false; // Not enough parts to be a valid domain

			foreach ($domain_array as $part)
			if (!preg_match('/^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])\|([A-Za-z0-9]))$/', $part))
			return false;

			if (!$dns_check \|\| !rcmail::get_instance()->config->get('email_dns_check'))
			return true;

			if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && version_compare(PHP_VERSION, '5.3.0', '<')) {
			$lookup = array();
			@exec("nslookup -type=MX " . escapeshellarg($domain_part) . " 2>&1", $lookup);
			foreach ($lookup as $line) {
			if (strpos($line, 'MX preference'))
			return true;
			}
			return false;
			}

			// find MX record(s)
			if (getmxrr($domain_part, $mx_records))
			return true;

			// find any DNS record
			if (checkdnsrr($domain_part, 'ANY'))
			return true;
			}

			return false;
			}

			/*
			* Idn_to_ascii wrapper.
			* Intl/Idn modules version of this function doesn't work with e-mail address
			*/
			function rcube_idn_to_ascii($str)
			{
			return rcube_idn_convert($str, true);
			}

			/*
			* Idn_to_ascii wrapper.
			* Intl/Idn modules version of this function doesn't work with e-mail address
			*/
			function rcube_idn_to_utf8($str)
			{
			return rcube_idn_convert($str, false);
			}

			function rcube_idn_convert($input, $is_utf=false)
			{
			if ($at = strpos($input, '@')) {
			$user = substr($input, 0, $at);
			$domain = substr($input, $at+1);
			}
			else {
			$domain = $input;
			}

			$domain = $is_utf ? idn_to_ascii($domain) : idn_to_utf8($domain);

			if ($domain === false) {
			return '';
			}

			return $at ? $user . '@' . $domain : $domain;
			}


			/**
			* Helper class to turn relative urls into absolute ones
			* using a predefined base
			*/
			class rcube_base_replacer
			{
			private $base_url;

			public function __construct($base)
			{
			$this->base_url = $base;
			}

			public function callback($matches)
			{
			return $matches[1] . '="' . self::absolute_url($matches[3], $this->base_url) . '"';
			}

			public function replace($body)
			{
			return preg_replace_callback(array(
			'/(src\|background\|href)=(["\']?)([^"\'\s]+)(\2\|\s\|>)/Ui',
			'/(url\s*$)(["\']?)([^"\'$\s]+)(\2)\)/Ui',
			),
			array($this, 'callback'), $body);
			}

			/**
			* Convert paths like ../xxx to an absolute path using a base url
			*
			* @param string $path Relative path
			* @param string $base_url Base URL
			*
			* @return string Absolute URL
			*/
			public static function absolute_url($path, $base_url)
			{
			$host_url = $base_url;
			$abs_path = $path;

			// check if path is an absolute URL
			if (preg_match('/^[fhtps]+:\/\//', $path)) {
			return $path;
			}

			// check if path is a content-id scheme
			if (strpos($path, 'cid:') === 0) {
			return $path;
			}

			// cut base_url to the last directory
			if (strrpos($base_url, '/') > 7) {
			$host_url = substr($base_url, 0, strpos($base_url, '/', 7));
			$base_url = substr($base_url, 0, strrpos($base_url, '/'));
			}

			// $path is absolute
			if ($path[0] == '/') {
			$abs_path = $host_url.$path;
			}
			else {
			// strip './' because its the same as ''
			$path = preg_replace('/^\.\//', '', $path);

			if (preg_match_all('/\.\.\//', $path, $matches, PREG_SET_ORDER)) {
			foreach ($matches as $a_match) {
			if (strrpos($base_url, '/')) {
			$base_url = substr($base_url, 0, strrpos($base_url, '/'));
			}
			$path = substr($path, 3);
			}
			}

			$abs_path = $base_url.'/'.$path;
			}

			return $abs_path;
			}
			}


			/**** debugging and logging functions ******/

			/**
			* Print or write debug messages
			*
			* @param mixed Debug message or data
			* @return void
			*/
			function console()
			{
			$args = func_get_args();

			if (class_exists('rcmail', false)) {
			$rcmail = rcmail::get_instance();
			if (is_object($rcmail->plugins)) {
			$plugin = $rcmail->plugins->exec_hook('console', array('args' => $args));
			if ($plugin['abort'])
			return;
			$args = $plugin['args'];
			}
			}

			$msg = array();
			foreach ($args as $arg)
			$msg[] = !is_string($arg) ? var_export($arg, true) : $arg;

			write_log('console', join(";\n", $msg));
			}


			/**
			* Append a line to a logfile in the logs directory.
			* Date will be added automatically to the line.
			*
			* @param $name name of log file
			* @param line Line to append
			* @return void
			*/
			function write_log($name, $line)
			{
			global $CONFIG, $RCMAIL;

			if (!is_string($line))
			$line = var_export($line, true);

			if (empty($CONFIG['log_date_format']))
			$CONFIG['log_date_format'] = 'd-M-Y H:i:s O';

			$date = date($CONFIG['log_date_format']);

			// trigger logging hook
			if (is_object($RCMAIL) && is_object($RCMAIL->plugins)) {
			$log = $RCMAIL->plugins->exec_hook('write_log', array('name' => $name, 'date' => $date, 'line' => $line));
			$name = $log['name'];
			$line = $log['line'];
			$date = $log['date'];
			if ($log['abort'])
			return true;
			}

			if ($CONFIG['log_driver'] == 'syslog') {
			$prio = $name == 'errors' ? LOG_ERR : LOG_INFO;
			syslog($prio, $line);
			return true;
			}
			else {
			$line = sprintf("[%s]: %s\n", $date, $line);

			// log_driver == 'file' is assumed here
			if (empty($CONFIG['log_dir']))
			$CONFIG['log_dir'] = INSTALL_PATH.'logs';

			// try to open specific log file for writing
			$logfile = $CONFIG['log_dir'].'/'.$name;
			if ($fp = @fopen($logfile, 'a')) {
			fwrite($fp, $line);
			fflush($fp);
			fclose($fp);
			return true;
			}
			else
			trigger_error("Error writing to log file $logfile; Please check permissions", E_USER_WARNING);
			}

			return false;
			}


			/**
			* Write login data (name, ID, IP address) to the 'userlogins' log file.
			*
			* @return void
			*/
			function rcmail_log_login()
			{
			global $RCMAIL;

			if (!$RCMAIL->config->get('log_logins') \|\| !$RCMAIL->user)
			return;

			write_log('userlogins', sprintf('Successful login for %s (ID: %d) from %s in session %s',
			$RCMAIL->user->get_username(), $RCMAIL->user->ID, rcmail_remote_ip(), session_id()));
			}


			/**
			* Returns remote IP address and forwarded addresses if found
			*
			* @return string Remote IP address(es)
			*/
			function rcmail_remote_ip()
			{
			$address = $_SERVER['REMOTE_ADDR'];

			// append the NGINX X-Real-IP header, if set
			if (!empty($_SERVER['HTTP_X_REAL_IP'])) {
			$remote_ip[] = 'X-Real-IP: ' . $_SERVER['HTTP_X_REAL_IP'];
			}
			// append the X-Forwarded-For header, if set
			if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
			$remote_ip[] = 'X-Forwarded-For: ' . $_SERVER['HTTP_X_FORWARDED_FOR'];
			}

			if (!empty($remote_ip))
			$address .= '(' . implode(',', $remote_ip) . ')';

			return $address;
			}


			/**
			* Check whether the HTTP referer matches the current request
			*
			* @return boolean True if referer is the same host+path, false if not
			*/
			function rcube_check_referer()
			{
			$uri = parse_url($_SERVER['REQUEST_URI']);
			$referer = parse_url(rc_request_header('Referer'));
			return $referer['host'] == rc_request_header('Host') && $referer['path'] == $uri['path'];
			}


			/**
			* @access private
			* @return mixed
			*/
			function rcube_timer()
			{
			return microtime(true);
			}


			/**
			* @access private
			* @return void
			*/
			function rcube_print_time($timer, $label='Timer', $dest='console')
			{
			static $print_count = 0;

			$print_count++;
			$now = rcube_timer();
			$diff = $now-$timer;

			if (empty($label))
			$label = 'Timer '.$print_count;

			write_log($dest, sprintf("%s: %0.4f sec", $label, $diff));
			}


			/**
			* Throw system error and show error page
			*
			* @param array Named parameters
			* - code: Error code (required)
			* - type: Error type [php\|db\|imap\|javascript] (required)
			* - message: Error message
			* - file: File where error occured
			* - line: Line where error occured
			* @param boolean True to log the error
			* @param boolean Terminate script execution
			*/
			// may be defined in Installer
			if (!function_exists('raise_error')) {
			function raise_error($arg=array(), $log=false, $terminate=false)
			{
			global $__page_content, $CONFIG, $OUTPUT, $ERROR_CODE, $ERROR_MESSAGE;

			// report bug (if not incompatible browser)
			if ($log && $arg['type'] && $arg['message'])
			rcube_log_bug($arg);

			// display error page and terminate script
			if ($terminate) {
			$ERROR_CODE = $arg['code'];
			$ERROR_MESSAGE = $arg['message'];
			include INSTALL_PATH . 'program/steps/utils/error.inc';
			exit;
			}
			}
			}


			/**
			* Report error according to configured debug_level
			*
			* @param array Named parameters
			* @return void
			* @see raise_error()
			*/
			function rcube_log_bug($arg_arr)
			{
			global $CONFIG;

			$program = strtoupper($arg_arr['type']);
			$level = $CONFIG['debug_level'];

			// disable errors for ajax requests, write to log instead (#1487831)
			if (($level & 4) && !empty($_REQUEST['_remote'])) {
			$level = ($level ^ 4) \| 1;
			}

			// write error to local log file
			if ($level & 1) {
			$post_query = ($_SERVER['REQUEST_METHOD'] == 'POST' ? '?_task='.urlencode($_POST['_task']).'&_action='.urlencode($_POST['_action']) : '');
			$log_entry = sprintf("%s Error: %s%s (%s %s)",
			$program,
			$arg_arr['message'],
			$arg_arr['file'] ? sprintf(' in %s on line %d', $arg_arr['file'], $arg_arr['line']) : '',
			$_SERVER['REQUEST_METHOD'],
			$_SERVER['REQUEST_URI'] . $post_query);

			if (!write_log('errors', $log_entry)) {
			// send error to PHPs error handler if write_log didn't succeed
			trigger_error($arg_arr['message']);
			}
			}

			// report the bug to the global bug reporting system
			if ($level & 2) {
			// TODO: Send error via HTTP
			}

			// show error if debug_mode is on
			if ($level & 4) {
			print "<b>$program Error";

			if (!empty($arg_arr['file']) && !empty($arg_arr['line']))
			print " in $arg_arr[file] ($arg_arr[line])";

			print ':</b> ';
			print nl2br($arg_arr['message']);
			print '<br />';
			flush();
			}
			}

			function rcube_upload_progress()
			{
			global $RCMAIL;

			$prefix = ini_get('apc.rfc1867_prefix');
			$params = array(
			'action' => $RCMAIL->action,
			'name' => get_input_value('_progress', RCUBE_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'] = rcube_label(array('name' => 'uploadprogress', 'vars' => array(
			'percent' => $params['percent'] . '%',
			'current' => show_bytes($params['current']),
			'total' => show_bytes($params['total'])
			)));

			$RCMAIL->output->command('upload_progress_update', $params);
			$RCMAIL->output->send();
			}

			function rcube_upload_init()
			{
			global $RCMAIL;

			// Enable upload progress bar
			if (($seconds = $RCMAIL->config->get('upload_progress')) && ini_get('apc.rfc1867')) {
			if ($field_name = ini_get('apc.rfc1867_name')) {
			$RCMAIL->output->set_env('upload_progress_name', $field_name);
			$RCMAIL->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;

			$RCMAIL->output->set_env('max_filesize', $max_filesize);
			$max_filesize = show_bytes($max_filesize);
			$RCMAIL->output->set_env('filesizeerror', rcube_label(array(
			'name' => 'filesizeerror', 'vars' => array('size' => $max_filesize))));

			return $max_filesize;
			}

			/**
			* Initializes client-side autocompletion
			*/
			function rcube_autocomplete_init()
			{
			global $RCMAIL;
			static $init;

			if ($init)
			return;

			$init = 1;

			if (($threads = (int)$RCMAIL->config->get('autocomplete_threads')) > 0) {
			$book_types = (array) $RCMAIL->config->get('autocomplete_addressbooks', 'sql');
			if (count($book_types) > 1) {
			$RCMAIL->output->set_env('autocomplete_threads', $threads);
			$RCMAIL->output->set_env('autocomplete_sources', $book_types);
			}
			}

			$RCMAIL->output->set_env('autocomplete_max', (int)$RCMAIL->config->get('autocomplete_max', 15));
			$RCMAIL->output->set_env('autocomplete_min_length', $RCMAIL->config->get('autocomplete_min_length'));
			$RCMAIL->output->add_label('autocompletechars', 'autocompletemore');
			}

			function rcube_fontdefs($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;
			}