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	<?php

	/*
	+-----------------------------------------------------------------------+
	\| program/include/main.inc \|
	\| \|
	\| This file is part of the RoundCube Webmail client \|
	\| Copyright (C) 2005, RoundCube Dev, - Switzerland \|
	\| Licensed under the GNU GPL \|
	\| \|
	\| PURPOSE: \|
	\| Provide basic functions for the webmail package \|
	\| \|
	+-----------------------------------------------------------------------+
	\| Author: Thomas Bruederli <roundcube@gmail.com> \|
	+-----------------------------------------------------------------------+

	$Id$

	*/

	require_once('lib/des.inc');


	// register session and connect to server
	function rcmail_startup($task='mail')
	{
	global $sess_id, $sess_auth, $sess_user_lang;
	global $CONFIG, $INSTALL_PATH, $BROWSER, $OUTPUT, $_SESSION, $IMAP, $DB, $JS_OBJECT_NAME;

	// check client
	$BROWSER = rcube_browser();

	// load config file
	include_once('config/main.inc.php');
	$CONFIG = is_array($rcmail_config) ? $rcmail_config : array();
	$CONFIG['skin_path'] = $CONFIG['skin_path'] ? preg_replace('/\/$/', '', $CONFIG['skin_path']) : 'skins/default';

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


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

	// set session garbage collecting time according to session_lifetime
	if (!empty($CONFIG['session_lifetime']))
	ini_set('session.gc_maxlifetime', ($CONFIG['session_lifetime']+2)*60);


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

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

	// we can use the database for storing session data
	if (is_object($DB) && $DB->db_provider!='sqlite')
	include_once('include/session.inc');


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

	// create session and set session vars
	if (!$_SESSION['client_id'])
	{
	$_SESSION['client_id'] = $sess_id;
	$_SESSION['user_lang'] = substr($CONFIG['locale_string'], 0, 2);
	$_SESSION['auth_time'] = mktime();
	$_SESSION['auth'] = rcmail_auth_hash($sess_id, $_SESSION['auth_time']);
	unset($GLOBALS['_auth']);
	}

	// set session vars global
	$sess_auth = $_SESSION['auth'];
	$sess_user_lang = $_SESSION['user_lang'];


	// overwrite config with user preferences
	if (is_array($_SESSION['user_prefs']))
	$CONFIG = array_merge($CONFIG, $_SESSION['user_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');
	}


	// create authorization 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);
	}



	// create IMAP object and connect to server
	function rcmail_imap_init($connect=FALSE)
	{
	global $CONFIG, $IMAP;

	$IMAP = new rcube_imap();

	// 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'])))
	show_message('imaperror', 'error');

	rcmail_set_imap_prop();
	}

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

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

	// 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 (strlen($CONFIG['imap_root']))
	$IMAP->set_rootdir($CONFIG['imap_root']);

	if (strlen($_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;

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


	// destroy session data and remove cookie
	function rcmail_kill_session()
	{
	/* $sess_name = session_name();
	if (isset($_COOKIE[$sess_name]))
	setcookie($sess_name, '', time()-42000, '/');
	*/
	$_SESSION = array();
	session_destroy();
	}


	// return correct name for a specific database table
	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;
	}



	// init output object for GUI and add common scripts
	function load_gui()
	{
	global $CONFIG, $OUTPUT, $COMM_PATH, $JS_OBJECT_NAME, $sess_user_lang;

	// init output page
	$OUTPUT = new rcube_html_page();

	// add common javascripts
	$javascript = "var $JS_OBJECT_NAME = new rcube_webmail();\n";
	$javascript .= "$JS_OBJECT_NAME.set_env('comm_path', '$COMM_PATH');\n";

	if (!empty($GLOBALS['_framed']))
	$javascript .= "$JS_OBJECT_NAME.set_env('framed', true);\n";

	$OUTPUT->add_script($javascript);
	$OUTPUT->include_script('program/js/common.js');
	$OUTPUT->include_script('program/js/app.js');

	// set user-selected charset
	if ($CONFIG['charset'])
	$OUTPUT->set_charset($CONFIG['charset']);
	else
	rcmail_set_locale($sess_user_lang);
	}


	// set localization charset based on the given language
	function rcmail_set_locale($lang)
	{
	global $OUTPUT, $INSTLL_PATH;
	static $rcube_charsets;

	if (!$rcube_charsets)
	@include($INSTLL_PATH.'program/localization/index.inc');

	if (isset($rcube_charsets[$lang]))
	$OUTPUT->set_charset($rcube_charsets[$lang]);
	else
	$OUTPUT->set_charset('ISO-8859-1');
	}


	// perfom login to the IMAP server and to the webmail service
	function rcmail_login($user, $pass, $host=NULL)
	{
	global $CONFIG, $IMAP, $DB, $sess_user_lang;
	$user_id = NULL;

	if (!$host)
	$host = $CONFIG['default_host'];

	// 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'))) ? TRUE : FALSE;
	$imap_port = isset($a_host['port']) ? $a_host['port'] : ($imap_ssl ? 993 : $CONFIG['default_port']);
	}

	// query if user already registered
	$sql_result = $DB->query("SELECT user_id, username, language, preferences
	FROM ".get_table_name('users')."
	WHERE mail_host=? AND (username=? OR alias=?)",
	$host,
	$user,
	$user);

	// user already registered -> overwrite username
	if ($sql_arr = $DB->fetch_assoc($sql_result))
	{
	$user_id = $sql_arr['user_id'];
	$user = $sql_arr['username'];
	}

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

	// user already registered
	if ($user_id && !empty($sql_arr))
	{
	// get user prefs
	if (strlen($sql_arr['preferences']))
	{
	$user_prefs = unserialize($sql_arr['preferences']);
	$_SESSION['user_prefs'] = $user_prefs;
	array_merge($CONFIG, $user_prefs);
	}


	// set user specific language
	if (strlen($sql_arr['language']))
	$sess_user_lang = $_SESSION['user_lang'] = $sql_arr['language'];

	// update user's record
	$DB->query("UPDATE ".get_table_name('users')."
	SET last_login=now()
	WHERE user_id=?",
	$user_id);
	}
	// create new system user
	else if ($CONFIG['auto_create_user'])
	{
	$user_id = rcmail_create_user($user, $host);
	}

	if ($user_id)
	{
	$_SESSION['user_id'] = $user_id;
	$_SESSION['imap_host'] = $host;
	$_SESSION['imap_port'] = $imap_port;
	$_SESSION['imap_ssl'] = $imap_ssl;
	$_SESSION['username'] = $user;
	$_SESSION['user_lang'] = $sess_user_lang;
	$_SESSION['password'] = encrypt_passwd($pass);

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

	return TRUE;
	}

	return FALSE;
	}


	// create new entry in users and identities table
	function rcmail_create_user($user, $host)
	{
	global $DB, $CONFIG, $IMAP;

	$DB->query("INSERT INTO ".get_table_name('users')."
	(created, last_login, username, mail_host, language)
	VALUES (now(), now(), ?, ?, ?)",
	$user,
	$host,
	$_SESSION['user_lang']);

	if ($user_id = $DB->insert_id('user_ids'))
	{
	$user_email = strstr($user, '@') ? $user : sprintf('%s@%s', $user, $host);
	$user_name = $user!=$user_email ? $user : '';

	// also create a new identity record
	$DB->query("INSERT INTO ".get_table_name('identities')."
	(user_id, `default`, name, email)
	VALUES (?, '1', ?, ?)",
	$user_id,
	$user_name,
	$user_email);

	// get existing mailboxes
	$a_mailboxes = $IMAP->list_mailboxes();

	// check if the configured mailbox for sent messages exists
	if ($CONFIG['sent_mbox'] && !in_array_nocase($CONFIG['sent_mbox'], $a_mailboxes))
	$IMAP->create_mailbox($CONFIG['sent_mbox'], TRUE);

	// check if the configured mailbox for sent messages exists
	if ($CONFIG['trash_mbox'] && !in_array_nocase($CONFIG['trash_mbox'], $a_mailboxes))
	$IMAP->create_mailbox($CONFIG['trash_mbox'], TRUE);
	}
	else
	{
	raise_error(array('code' => 500,
	'type' => 'php',
	'line' => __LINE__,
	'file' => __FILE__,
	'message' => "Failed to create new user"), TRUE, FALSE);
	}

	return $user_id;
	}


	function show_message($message, $type='notice')
	{
	global $OUTPUT, $JS_OBJECT_NAME, $REMOTE_REQUEST;

	$framed = $GLOBALS['_framed'];
	$command = sprintf("display_message('%s', '%s');",
	addslashes(rep_specialchars_output(rcube_label($message))),
	$type);

	if ($REMOTE_REQUEST)
	return 'this.'.$command;

	else
	$OUTPUT->add_script(sprintf("%s%s.%s",
	$framed ? sprintf('if(parent.%s)parent.', $JS_OBJECT_NAME) : '',
	$JS_OBJECT_NAME,
	$command));

	// console(rcube_label($message));
	}


	function console($msg, $type=1)
	{
	if ($GLOBALS['REMOTE_REQUEST'])
	print "// $msg\n";
	else
	{
	print $msg;
	print "\n<hr>\n";
	}
	}


	function encrypt_passwd($pass)
	{
	$cypher = des('rcmail?24BitPwDkeyF**ECB', $pass, 1, 0, NULL);
	return base64_encode($cypher);
	}


	function decrypt_passwd($cypher)
	{
	$pass = des('rcmail?24BitPwDkeyF**ECB', base64_decode($cypher), 0, 0, NULL);
	return trim($pass);
	}


	// send correct response on a remote request
	function rcube_remote_response($js_code)
	{
	send_nocacheing_headers();
	//header('Content-Type: text/javascript');
	header('Content-Type: application/x-javascript');

	print '/ remote response ['.date('d/M/Y h:i:s O')."] /\n";
	print $js_code;
	exit;
	}


	// read directory program/localization/ and return a list of available languages
	function rcube_list_languages()
	{
	global $CONFIG, $INSTALL_PATH;
	static $sa_languages = array();

	if (!sizeof($sa_languages))
	{
	@include($INSTLL_PATH.'program/localization/index.inc');

	if ($dh = @opendir($INSTLL_PATH.'program/localization'))
	{
	while (($name = readdir($dh)) !== false)
	{
	if ($name{0}=='.' \|\| !is_dir($INSTLL_PATH.'program/localization/'.$name))
	continue;

	if ($label = $rcube_languages[$name])
	$sa_languages[$name] = $label ? $label : $name;
	}
	closedir($dh);
	}
	}

	return $sa_languages;
	}



	// ************ template parsing and gui functions ************


	// return boolean if a specific template exists
	function template_exists($name)
	{
	global $CONFIG, $OUTPUT;
	$skin_path = $CONFIG['skin_path'];

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


	// get page template an replace variable
	// similar function as used in nexImage
	function parse_template($name='main', $exit=TRUE)
	{
	global $CONFIG, $OUTPUT;
	$skin_path = $CONFIG['skin_path'];

	// read template file
	$templ = '';
	$path = "$skin_path/templates/$name.html";

	if($fp = @fopen($path, 'r'))
	{
	$templ = fread($fp, filesize($path));
	fclose($fp);
	}
	else
	{
	raise_error(array('code' => 500,
	'type' => 'php',
	'line' => __LINE__,
	'file' => __FILE__,
	'message' => "Error loading template for '$name'"), TRUE, TRUE);
	return FALSE;
	}


	// parse for specialtags
	$output = parse_rcube_xml($templ);

	$OUTPUT->write(trim(parse_with_globals($output)), $skin_path);

	if ($exit)
	exit;
	}



	// replace all strings ($varname) with the content of the according global variable
	function parse_with_globals($input)
	{
	$output = preg_replace('/\$(__[a-z0-9_\-]+)/e', '$GLOBALS["\\1"]', $input);
	return $output;
	}



	function parse_rcube_xml($input)
	{
	$output = preg_replace('/<roundcube:([-_a-z]+)\s+([^>]+)>/Uie', "rcube_xml_command('\\1', '\\2')", $input);
	return $output;
	}


	function rcube_xml_command($command, $str_attrib, $a_attrib=NULL)
	{
	global $IMAP, $CONFIG;

	$attrib = array();
	$command = strtolower($command);

	preg_match_all('/\s*([-_a-z]+)=["]([^"]+)["]?/i', stripslashes($str_attrib), $regs, PREG_SET_ORDER);

	// convert attributes to an associative array (name => value)
	if ($regs)
	foreach ($regs as $attr)
	$attrib[strtolower($attr[1])] = $attr[2];
	else if ($a_attrib)
	$attrib = $a_attrib;

	// execute command
	switch ($command)
	{
	// return a button
	case 'button':
	if ($attrib['command'])
	return rcube_button($attrib);
	break;

	// show a label
	case 'label':
	if ($attrib['name'] \|\| $attrib['command'])
	return rep_specialchars_output(rcube_label($attrib));
	break;

	// create a menu item
	case 'menu':
	if ($attrib['command'] && $attrib['group'])
	rcube_menu($attrib);
	break;

	// include a file
	case 'include':
	$path = realpath($CONFIG['skin_path'].$attrib['file']);

	if($fp = @fopen($path, 'r'))
	{
	$incl = fread($fp, filesize($path));
	fclose($fp);
	return parse_rcube_xml($incl);
	}
	break;

	// return code for a specific application object
	case 'object':
	$object = strtolower($attrib['name']);

	if ($object=='loginform')
	return rcmail_login_form($attrib);

	else if ($object=='message')
	return rcmail_message_container($attrib);

	// MAIL
	else if ($object=='mailboxlist' && function_exists('rcmail_mailbox_list'))
	return rcmail_mailbox_list($attrib);

	else if ($object=='messages' && function_exists('rcmail_message_list'))
	return rcmail_message_list($attrib);

	else if ($object=='messagecountdisplay' && function_exists('rcmail_messagecount_display'))
	return rcmail_messagecount_display($attrib);

	else if ($object=='messageheaders' && function_exists('rcmail_message_headers'))
	return rcmail_message_headers($attrib);

	else if ($object=='messageattachments' && function_exists('rcmail_message_attachments'))
	return rcmail_message_attachments($attrib);

	else if ($object=='messagebody' && function_exists('rcmail_message_body'))
	return rcmail_message_body($attrib);

	else if ($object=='blockedobjects' && function_exists('rcmail_remote_objects_msg'))
	return rcmail_remote_objects_msg($attrib);

	else if ($object=='messagecontentframe' && function_exists('rcmail_messagecontent_frame'))
	return rcmail_messagecontent_frame($attrib);

	else if ($object=='messagepartframe' && function_exists('rcmail_message_part_frame'))
	return rcmail_message_part_frame($attrib);

	else if ($object=='messagepartcontrols' && function_exists('rcmail_message_part_controls'))
	return rcmail_message_part_controls($attrib);

	else if ($object=='composeheaders' && function_exists('rcmail_compose_headers'))
	return rcmail_compose_headers($attrib);

	else if ($object=='composesubject' && function_exists('rcmail_compose_subject'))
	return rcmail_compose_subject($attrib);

	else if ($object=='composebody' && function_exists('rcmail_compose_body'))
	return rcmail_compose_body($attrib);

	else if ($object=='composeattachmentlist' && function_exists('rcmail_compose_attachment_list'))
	return rcmail_compose_attachment_list($attrib);

	else if ($object=='composeattachmentform' && function_exists('rcmail_compose_attachment_form'))
	return rcmail_compose_attachment_form($attrib);

	else if ($object=='composeattachment' && function_exists('rcmail_compose_attachment_field'))
	return rcmail_compose_attachment_field($attrib);

	else if ($object=='priorityselector' && function_exists('rcmail_priority_selector'))
	return rcmail_priority_selector($attrib);

	else if ($object=='priorityselector' && function_exists('rcmail_priority_selector'))
	return rcmail_priority_selector($attrib);


	// ADDRESS BOOK
	else if ($object=='addresslist' && function_exists('rcmail_contacts_list'))
	return rcmail_contacts_list($attrib);

	else if ($object=='addressframe' && function_exists('rcmail_contact_frame'))
	return rcmail_contact_frame($attrib);

	else if ($object=='recordscountdisplay' && function_exists('rcmail_rowcount_display'))
	return rcmail_rowcount_display($attrib);

	else if ($object=='contactdetails' && function_exists('rcmail_contact_details'))
	return rcmail_contact_details($attrib);

	else if ($object=='contacteditform' && function_exists('rcmail_contact_editform'))
	return rcmail_contact_editform($attrib);


	// USER SETTINGS
	else if ($object=='userprefs' && function_exists('rcmail_user_prefs_form'))
	return rcmail_user_prefs_form($attrib);

	else if ($object=='itentitieslist' && function_exists('rcmail_identities_list'))
	return rcmail_identities_list($attrib);

	else if ($object=='identityframe' && function_exists('rcmail_identity_frame'))
	return rcmail_identity_frame($attrib);

	else if ($object=='identityform' && function_exists('rcube_identity_form'))
	return rcube_identity_form($attrib);

	else if ($object=='foldersubscription' && function_exists('rcube_subscription_form'))
	return rcube_subscription_form($attrib);

	else if ($object=='createfolder' && function_exists('rcube_create_folder_form'))
	return rcube_create_folder_form($attrib);


	else if ($object=='pagetitle')
	{
	$task = $GLOBALS['_task'];
	if ($task=='mail' && isset($GLOBALS['MESSAGE']['subject']))
	return rep_specialchars_output("RoundCube\|Mail :: ".$GLOBALS['MESSAGE']['subject']);
	else if (isset($GLOBALS['PAGE_TITLE']))
	return rep_specialchars_output("RoundCube\|Mail :: ".$GLOBALS['PAGE_TITLE']);
	else if ($task=='mail' && ($mbox_name = $IMAP->get_mailbox_name()))
	return "RoundCube\|Mail :: ".rep_specialchars_output(UTF7DecodeString($mbox_name), 'html', 'all');
	else
	return "RoundCube\|Mail :: $task";
	}

	else if ($object=='about')
	return '';

	break;
	}

	return '';
	}


	// create and register a button
	function rcube_button($attrib)
	{
	global $CONFIG, $OUTPUT, $JS_OBJECT_NAME, $BROWSER;
	static $sa_buttons = array();
	static $s_button_count = 100;

	$skin_path = $CONFIG['skin_path'];

	if (!($attrib['command'] \|\| $attrib['name']))
	return '';

	// try to find out the button type
	if ($attrib['type'])
	$attrib['type'] = strtolower($attrib['type']);
	else
	$attrib['type'] = ($attrib['image'] \|\| $attrib['imagepas'] \|\| $arg['imagect']) ? 'image' : 'link';


	$command = $attrib['command'];

	// take the button from the stack
	if($attrib['name'] && $sa_buttons[$attrib['name']])
	$attrib = $sa_buttons[$attrib['name']];

	// add button to button stack
	else if($attrib['image'] \|\| $arg['imagect'] \|\| $attrib['imagepas'] \|\| $attrib['class'])
	{
	if(!$attrib['name'])
	$attrib['name'] = $command;

	if (!$attrib['image'])
	$attrib['image'] = $attrib['imagepas'] ? $attrib['imagepas'] : $attrib['imageact'];

	$sa_buttons[$attrib['name']] = $attrib;
	}

	// get saved button for this command/name
	else if ($command && $sa_buttons[$command])
	$attrib = $sa_buttons[$command];

	//else
	// return '';


	// set border to 0 because of the link arround the button
	if ($attrib['type']=='image' && !isset($attrib['border']))
	$attrib['border'] = 0;

	if (!$attrib['id'])
	$attrib['id'] = sprintf('rcmbtn%d', $s_button_count++);

	// get localized text for labels and titles
	if ($attrib['title'])
	$attrib['title'] = rep_specialchars_output(rcube_label($attrib['title']));
	if ($attrib['label'])
	$attrib['label'] = rep_specialchars_output(rcube_label($attrib['label']));

	if ($attrib['alt'])
	$attrib['alt'] = rep_specialchars_output(rcube_label($attrib['alt']));

	// set title to alt attribute for IE browsers
	if ($BROWSER['ie'] && $attrib['title'] && !$attrib['alt'])
	{
	$attrib['alt'] = $attrib['title'];
	unset($attrib['title']);
	}

	// add empty alt attribute for XHTML compatibility
	if (!isset($attrib['alt']))
	$attrib['alt'] = '';


	// register button in the system
	if ($attrib['command'])
	$OUTPUT->add_script(sprintf("%s.register_button('%s', '%s', '%s', '%s', '%s', '%s');",
	$JS_OBJECT_NAME,
	$command,
	$attrib['id'],
	$attrib['type'],
	$attrib['imageact'] ? $skin_path.$attrib['imageact'] : $attrib['classact'],
	$attirb['imagesel'] ? $skin_path.$attirb['imagesel'] : $attrib['classsel'],
	$attrib['imageover'] ? $skin_path.$attrib['imageover'] : ''));

	// overwrite attributes
	if (!$attrib['href'])
	$attrib['href'] = '#';

	if ($command)
	$attrib['onclick'] = sprintf("return %s.command('%s','%s',this)", $JS_OBJECT_NAME, $command, $attrib['prop']);

	if ($command && $attrib['imageover'])
	{
	$attrib['onmouseover'] = sprintf("return %s.button_over('%s','%s')", $JS_OBJECT_NAME, $command, $attrib['id']);
	$attrib['onmouseout'] = sprintf("return %s.button_out('%s','%s')", $JS_OBJECT_NAME, $command, $attrib['id']);
	}


	$out = '';

	// generate image tag
	if ($attrib['type']=='image')
	{
	$attrib_str = create_attrib_string($attrib, array('style', 'class', 'id', 'width', 'height', 'border', 'hspace', 'vspace', 'alt'));
	$img_tag = sprintf('<img src="%%s"%s />', $attrib_str);
	$btn_content = sprintf($img_tag, $skin_path.$attrib['image']);
	if ($attrib['label'])
	$btn_content .= ' '.$attrib['label'];

	$link_attrib = array('href', 'onclick', 'onmouseover', 'onmouseout', 'title');
	}
	else if ($attrib['type']=='link')
	{
	$btn_content = $attrib['label'] ? $attrib['label'] : $attrib['command'];
	$link_attrib = array('href', 'onclick', 'title', 'id', 'class', 'style');
	}
	else if ($attrib['type']=='input')
	{
	$attrib['type'] = 'button';

	if ($attrib['label'])
	$attrib['value'] = $attrib['label'];

	$attrib_str = create_attrib_string($attrib, array('type', 'value', 'onclick', 'id', 'class', 'style'));
	$out = sprintf('<input%s disabled />', $attrib_str);
	}

	// generate html code for button
	if ($btn_content)
	{
	$attrib_str = create_attrib_string($attrib, $link_attrib);
	$out = sprintf('<a%s>%s</a>', $attrib_str, $btn_content);
	}

	return $out;
	}


	function rcube_menu($attrib)
	{

	return '';
	}



	function rcube_table_output($attrib, $sql_result, $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";

	foreach ($a_show_cols as $col)
	$table .= '<td class="'.$col.'">' . rep_specialchars_output(rcube_label($col)) . "</td>\n";

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

	$c = 0;
	while ($sql_result && ($sql_arr = $DB->fetch_assoc($sql_result)))
	{
	$zebra_class = $c%2 ? 'even' : 'odd';

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

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

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

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

	return $table;
	}



	function rcmail_get_edit_field($col, $value, $attrib, $type='text')
	{
	$fname = '_'.$col;
	$attrib['name'] = $fname;

	if ($type=='checkbox')
	{
	$attrib['value'] = '1';
	$input = new checkbox($attrib);
	}
	else if ($type=='textarea')
	{
	$attrib['cols'] = $attrib['size'];
	$input = new textarea($attrib);
	}
	else
	$input = new textfield($attrib);

	// use value from post
	if (!empty($_POST[$fname]))
	$value = $_POST[$fname];

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

	return $out;
	}


	function create_attrib_string($attrib, $allowed_attribs=array('id', 'class', 'style'))
	{
	// allow the following attributes to be added to the <iframe> tag
	$attrib_str = '';
	foreach ($allowed_attribs as $a)
	if (isset($attrib[$a]))
	$attrib_str .= sprintf(' %s="%s"', $a, $attrib[$a]);

	return $attrib_str;
	}



	function format_date($date, $format=NULL)
	{
	global $CONFIG, $sess_user_lang;

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

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

	// get current timestamp in user's timezone
	$now = time(); // local time
	$now -= (int)date('Z'); // make GMT time
	$now += ($CONFIG['timezone'] * 3600); // user's time

	$day_secs = 60((int)date('H', $now)60 + (int)date('i', $now));
	$week_secs = 60 * 60 * 24 * 7;
	$diff = $now - $timestamp;

	// define date format depending on current time
	if ($CONFIG['prettydate'] && !$format && $diff < $day_secs)
	return sprintf('%s %s', rcube_label('today'), date('H:i', $timestamp));
	else if ($CONFIG['prettydate'] && !$format && $diff < $week_secs)
	$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';


	// parse format string manually in order to provide localized weekday and month names
	// an alternative would be to convert the date() format string to fit with strftime()
	$out = '';
	for($i=0; $i<strlen($format); $i++)
	{
	if ($format{$i}=='\\') // skip escape chars
	continue;

	// write char "as-is"
	if ($format{$i}==' ' \|\| $format{$i-1}=='\\')
	$out .= $format{$i};
	// weekday (short)
	else if ($format{$i}=='D')
	$out .= rcube_label(strtolower(date('D', $timestamp)));
	// weekday long
	else if ($format{$i}=='l')
	$out .= rcube_label(strtolower(date('l', $timestamp)));
	// month name (short)
	else if ($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
	$out .= date($format{$i}, $timestamp);
	}

	return $out;
	}


	// ************ functions delivering gui objects ************



	function rcmail_message_container($attrib)
	{
	global $OUTPUT, $JS_OBJECT_NAME;

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

	// allow the following attributes to be added to the <table> tag
	$attrib_str = create_attrib_string($attrib, array('style', 'class', 'id'));
	$out = '<div' . $attrib_str . "></div>";

	$OUTPUT->add_script("$JS_OBJECT_NAME.gui_object('message', '$attrib[id]');");

	return $out;
	}


	// return code for the webmail login form
	function rcmail_login_form($attrib)
	{
	global $CONFIG, $OUTPUT, $JS_OBJECT_NAME, $SESS_HIDDEN_FIELD;

	$labels = array();
	$labels['user'] = rcube_label('username');
	$labels['pass'] = rcube_label('password');
	$labels['host'] = rcube_label('server');

	$input_user = new textfield(array('name' => '_user', 'size' => 30));
	$input_pass = new passwordfield(array('name' => '_pass', 'size' => 30));
	$input_action = new hiddenfield(array('name' => '_action', 'value' => 'login'));

	$fields = array();
	$fields['user'] = $input_user->show($_POST['_user']);
	$fields['pass'] = $input_pass->show();
	$fields['action'] = $input_action->show();

	if (is_array($CONFIG['default_host']))
	{
	$select_host = new select(array('name' => '_host'));

	foreach ($CONFIG['default_host'] as $key => $value)
	$select_host->add($value, (is_numeric($key) ? $value : $key));

	$fields['host'] = $select_host->show($_POST['_host']);
	}
	else if (!strlen($CONFIG['default_host']))
	{
	$input_host = new textfield(array('name' => '_host', 'size' => 30));
	$fields['host'] = $input_host->show($_POST['_host']);
	}

	$form_name = strlen($attrib['form']) ? $attrib['form'] : 'form';
	$form_start = !strlen($attrib['form']) ? '<form name="form" action="./" method="post">' : '';
	$form_end = !strlen($attrib['form']) ? '</form>' : '';

	if ($fields['host'])
	$form_host = <<<EOF

	</tr><tr>

	<td class="title">$labels[host]</td>
	<td>$fields[host]</td>

	EOF;

	$OUTPUT->add_script("$JS_OBJECT_NAME.gui_object('loginform', '$form_name');");

	$out = <<<EOF
	$form_start
	$SESS_HIDDEN_FIELD
	$fields[action]
	<table><tr>

	<td class="title">$labels[user]</td>
	<td>$fields[user]</td>

	</tr><tr>

	<td class="title">$labels[pass]</td>
	<td>$fields[pass]</td>
	$form_host
	</tr></table>
	$form_end
	EOF;

	return $out;
	}


	?>

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