From 7786ba1adb415fc8fd4478380d7201702a799483 Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Fri, 20 May 2011 04:00:40 -0400
Subject: [PATCH] - Fix error when rcube_cache::remove() was used in pattern mode

---
 program/include/main.inc |  576 ++++++++++++++++++++++++++++++++-------------------------
 1 files changed, 322 insertions(+), 254 deletions(-)

diff --git a/program/include/main.inc b/program/include/main.inc
index 697b3ff..44a43c6 100644
--- a/program/include/main.inc
+++ b/program/include/main.inc
@@ -5,7 +5,7 @@
  | program/include/main.inc                                              |
  |                                                                       |
  | This file is part of the Roundcube Webmail client                     |
- | Copyright (C) 2005-2009, The Roundcube Dev Team                       |
+ | Copyright (C) 2005-2011, The Roundcube Dev Team                       |
  | Licensed under the GNU GPL                                            |
  |                                                                       |
  | PURPOSE:                                                              |
@@ -26,11 +26,8 @@
  * @author Thomas Bruederli <roundcube@gmail.com>
  */
 
-require_once('lib/utf7.inc');
-require_once('include/rcube_shared.inc');
-
-// fallback if not PHP modules are available
-@include_once('lib/utf8.class.php');
+require_once 'utf7.inc';
+require_once INSTALL_PATH . 'program/include/rcube_shared.inc';
 
 // define constannts for input reading
 define('RCUBE_INPUT_GET', 0x0101);
@@ -84,12 +81,25 @@
  * It's a global wrapper for rcmail::gettext()
  *
  * @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_label($p, $domain=null)
 {
   return rcmail::get_instance()->gettext($p, $domain);
+}
+
+
+/**
+ * Global wrapper of rcmail::text_exists()
+ * to check whether a text label is defined
+ *
+ * @see rcmail::text_exists()
+ */
+function rcube_label_exists($name, $domain=null)
+{
+  return rcmail::get_instance()->text_exists($name, $domain);
 }
 
 
@@ -277,7 +287,7 @@
     }
     $error = true;
   }
-  
+
   // encode string for output
   if ($from == 'UTF-8') {
     // @TODO: we need a function for UTF-7 (RFC2152) conversion
@@ -299,7 +309,7 @@
     }
     $error = true;
   }
-  
+
   // report error
   if ($error && !$convert_warning) {
     raise_error(array(
@@ -309,10 +319,10 @@
       'line' => __LINE__,
       'message' => "Could not convert string from $from to $to. Make sure iconv/mbstring is installed or lib/utf8.class is available."
       ), true, false);
-    
+
     $convert_warning = true;
   }
-  
+
   // return UTF-8 or original string
   return $str;
   }
@@ -728,6 +738,16 @@
 }
 
 /**
+ * Convert the given string into a valid HTML identifier
+ * Same functionality as done in app.js with this.identifier_expr
+ *
+ */
+function html_identifier($str)
+{
+  return asciiwords($str, true, '_');
+}
+
+/**
  * Remove single and double quotes from given string
  *
  * @param string Input value
@@ -778,7 +798,7 @@
     while ($table_data && ($sql_arr = $db->fetch_assoc($table_data)))
     {
       $zebra_class = $c % 2 ? 'even' : 'odd';
-      $table->add_row(array('id' => 'rcmrow' . $sql_arr[$id_col], 'class' => $zebra_class));
+      $table->add_row(array('id' => 'rcmrow' . html_identifier($sql_arr[$id_col]), 'class' => $zebra_class));
 
       // format each col
       foreach ($a_show_cols as $col)
@@ -795,7 +815,7 @@
       if (!empty($row_data['class']))
         $zebra_class .= ' '.$row_data['class'];
 
-      $table->add_row(array('id' => 'rcmrow' . $row_data[$id_col], 'class' => $zebra_class));
+      $table->add_row(array('id' => 'rcmrow' . html_identifier($row_data[$id_col]), 'class' => $zebra_class));
 
       // format each col
       foreach ($a_show_cols as $col)
@@ -1017,7 +1037,7 @@
  * @return string Formatted date string
  */
 function format_date($date, $format=NULL)
-  {
+{
   global $CONFIG;
   
   $ts = NULL;
@@ -1027,7 +1047,7 @@
 
   if (empty($ts))
     return '';
-   
+
   // get user's timezone
   if ($CONFIG['timezone'] === 'auto')
     $tz = isset($_SESSION['timezone']) ? $_SESSION['timezone'] : date('Z')/3600;
@@ -1039,7 +1059,7 @@
 
   // 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
@@ -1047,30 +1067,33 @@
   $now_date = getdate($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']);
+  $week_limit  = mktime(0, 0, 0, $now_date['mon'], $now_date['mday']-6, $now_date['year']);
 
   // define date format depending on current time
   if (!$format) {
-    if ($CONFIG['prettydate'] && $timestamp > $today_limit && $timestamp < $now)
-      return sprintf('%s %s', rcube_label('today'), date($CONFIG['date_today'] ? $CONFIG['date_today'] : 'H:i', $timestamp));
+    if ($CONFIG['prettydate'] && $timestamp > $today_limit && $timestamp < $now) {
+      $format = $CONFIG['date_today'] ? $CONFIG['date_today'] : 'H:i';
+      $today  = true;
+    }
     else if ($CONFIG['prettydate'] && $timestamp > $week_limit && $timestamp < $now)
       $format = $CONFIG['date_short'] ? $CONFIG['date_short'] : 'D H:i';
     else
       $format = $CONFIG['date_long'] ? $CONFIG['date_long'] : 'd.m.Y H:i';
-    }
+  }
 
   // strftime() format
-  if (preg_match('/%[a-z]+/i', $format))
-    return strftime($format, $timestamp);
+  if (preg_match('/%[a-z]+/i', $format)) {
+    $format = strftime($format, $timestamp);
+    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); $i++)
-    {
+  for($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};
@@ -1090,10 +1113,21 @@
       $out .= strftime('%x %X', $timestamp);
     else
       $out .= date($format{$i}, $timestamp);
-    }
-  
-  return $out;
   }
+
+  if ($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;
+    }
+  }
+
+  return $out;
+}
 
 
 /**
@@ -1104,179 +1138,13 @@
  * @return string Formatted string
  */
 function format_email_recipient($email, $name='')
-  {
-  if ($name && $name != $email)
-    {
+{
+  if ($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));
-    }
-  else
-    return trim($email);
   }
 
-
-
-/****** debugging 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))
-      $rcmail->plugins->exec_hook('console', $args);
-  }
-
-  $msg = array();
-  foreach ($args as $arg)
-    $msg[] = !is_string($arg) ? var_export($arg, true) : $arg;
-
-  if (!($GLOBALS['CONFIG']['debug_level'] & 4))
-    write_log('console', join(";\n", $msg));
-  else if ($GLOBALS['OUTPUT']->ajax_call)
-    print "/*\n " . join(";\n", $msg) . " \n*/\n";
-  else
-    {
-    print '<div style="background:#eee; border:1px solid #ccc; margin-bottom:3px; padding:6px"><pre>';
-    print join(";<br/>\n", $msg);
-    print "</pre></div>\n";
-    }
-  }
-
-
-/**
- * Append a line to a logfile in the logs directory.
- * Date will be added automatically to the line.
- *
- * @param $name name of log file
- * @param line Line to append
- * @return void
- */
-function write_log($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',
-    $RCMAIL->user->get_username(), $RCMAIL->user->ID, rcmail_remote_ip()));
-}
-
-
-/**
- * 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 $address;
-}
-
-
-/**
- * @access private
- * @return mixed
- */
-function rcube_timer()
-{
-  return microtime(true);
-}
-
-
-/**
- * @access private
- * @return void
- */
-function rcube_print_time($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, $diff));
+  return trim($email);
 }
 
 
@@ -1290,25 +1158,28 @@
 {
   global $RCMAIL;
   static $a_mailboxes;
-  
+
   $attrib += array('maxlength' => 100, 'realnames' => false);
 
   // add some labels to client
   $RCMAIL->output->add_label('purgefolderconfirm', 'deletemessagesconfirm');
-  
+
   $type = $attrib['type'] ? $attrib['type'] : 'ul';
   unset($attrib['type']);
 
   if ($type=='ul' && !$attrib['id'])
     $attrib['id'] = 'rcmboxlist';
 
+  if (empty($attrib['folder_name']))
+    $attrib['folder_name'] = '*';
+
   // get mailbox list
   $mbox_name = $RCMAIL->imap->get_mailbox_name();
-  
+
   // build the folders tree
   if (empty($a_mailboxes)) {
     // get mailbox list
-    $a_folders = $RCMAIL->imap->list_mailboxes();
+    $a_folders = $RCMAIL->imap->list_mailboxes('', $attrib['folder_name'], $attrib['folder_filter']);
     $delimiter = $RCMAIL->imap->get_hierarchy_delimiter();
     $a_mailboxes = array();
 
@@ -1319,20 +1190,20 @@
   // 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));
 
-  if ($type=='select') {
+  if ($type == 'select') {
     $select = new html_select($attrib);
-    
+
     // add no-selection option
     if ($attrib['noselection'])
-      $select->add(rcube_label($attrib['noselection']), '0');
-    
+      $select->add(rcube_label($attrib['noselection']), '');
+
     rcmail_render_folder_tree_select($hook['list'], $mbox_name, $attrib['maxlength'], $select, $attrib['realnames']);
     $out = $select->show();
   }
   else {
     $js_mailboxlist = array();
     $out = html::tag('ul', $attrib, rcmail_render_folder_tree_html($hook['list'], $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('collapsed_folders', $RCMAIL->config->get('collapsed_folders'));
@@ -1351,26 +1222,32 @@
 function rcmail_mailbox_select($p = array())
 {
   global $RCMAIL;
-  
+
   $p += array('maxlength' => 100, 'realnames' => false);
   $a_mailboxes = array();
 
-  if ($p['unsubscribed'])
-    $list = $RCMAIL->imap->list_unsubscribed();
-  else
-    $list = $RCMAIL->imap->list_mailboxes();
+  if (empty($p['folder_name']))
+    $p['folder_name'] = '*';
 
-  foreach ($list as $folder)
+  if ($p['unsubscribed'])
+    $list = $RCMAIL->imap->list_unsubscribed('', $p['folder_name'], $p['folder_filter']);
+  else
+    $list = $RCMAIL->imap->list_mailboxes('', $p['folder_name'], $p['folder_filter']);
+
+  $delimiter = $RCMAIL->imap->get_hierarchy_delimiter();
+
+  foreach ($list as $folder) {
     if (empty($p['exceptions']) || !in_array($folder, $p['exceptions']))
-      rcmail_build_folder_tree($a_mailboxes, $folder, $RCMAIL->imap->get_hierarchy_delimiter());
+      rcmail_build_folder_tree($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']);
-  
+
   return $select;
 }
 
@@ -1383,6 +1260,17 @@
 function rcmail_build_folder_tree(&$arrFolders, $folder, $delm='/', $path='')
 {
   global $RCMAIL;
+
+  // Handle namespace prefix
+  $prefix = '';
+  if (!$path) {
+    $n_folder = $folder;
+    $folder = $RCMAIL->imap->mod_mailbox($folder);
+
+    if ($n_folder != $folder) {
+      $prefix = substr($n_folder, 0, -strlen($folder));
+    }
+  }
 
   $pos = strpos($folder, $delm);
 
@@ -1404,14 +1292,14 @@
     $virtual = false;
   }
 
-  $path .= $currentFolder;
-
-  // Check \Noselect option (if options are in cache)
-  if (!$virtual && ($opts = $RCMAIL->imap->mailbox_options($path))) {
-    $virtual = in_array('\\Noselect', $opts);
-  }
+  $path .= $prefix.$currentFolder;
 
   if (!isset($arrFolders[$currentFolder])) {
+    // Check \Noselect option (if options are in cache)
+    if (!$virtual && ($opts = $RCMAIL->imap->mailbox_options($path))) {
+      $virtual = in_array('\\Noselect', $opts);
+    }
+
     $arrFolders[$currentFolder] = array(
       'id' => $path,
       'name' => rcube_charset_convert($currentFolder, 'UTF7-IMAP'),
@@ -1424,7 +1312,7 @@
   if (strlen($subFolders))
     rcmail_build_folder_tree($arrFolders[$currentFolder]['folders'], $subFolders, $delm, $path.$delm);
 }
-  
+
 
 /**
  * Return html for a structured list &lt;ul&gt; for the mailbox tree
@@ -1434,7 +1322,7 @@
 function rcmail_render_folder_tree_html(&$arrFolders, &$mbox_name, &$jslist, $attrib, $nestLevel=0)
 {
   global $RCMAIL, $CONFIG;
-  
+
   $maxlength = intval($attrib['maxlength']);
   $realnames = (bool)$attrib['realnames'];
   $msgcounts = $RCMAIL->imap->get_cache('messagecount');
@@ -1461,7 +1349,7 @@
     }
 
     // make folder name safe for ids and class names
-    $folder_id = asciiwords($folder['id'], true, '_');
+    $folder_id = html_identifier($folder['id']);
     $classes = array('mailbox');
 
     // set special class for Sent, Drafts, Trash and Junk
@@ -1477,15 +1365,15 @@
       $classes[] = 'inbox';
     else
       $classes[] = '_'.asciiwords($folder_class ? $folder_class : strtolower($folder['id']), true);
-      
+
     $classes[] = $zebra_class;
-    
+
     if ($folder['id'] == $mbox_name)
       $classes[] = 'selected';
 
     $collapsed = preg_match('/&'.rawurlencode($folder['id']).'&/', $RCMAIL->config->get('collapsed_folders'));
     $unread = $msgcounts ? intval($msgcounts[$folder['id']]['UNSEEN']) : 0;
-    
+
     if ($folder['virtual'])
       $classes[] = 'virtual';
     else if ($unread)
@@ -1496,6 +1384,7 @@
     $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,
     );
 
@@ -1509,9 +1398,9 @@
         'style' => "position:absolute",
         'onclick' => sprintf("%s.command('collapse-folder', '%s')", JS_OBJECT_NAME, $js_name)
       ), '&nbsp;') : ''));
-    
+
     $jslist[$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, $nestLevel+1));
@@ -1531,32 +1420,28 @@
  * @return string
  */
 function rcmail_render_folder_tree_select(&$arrFolders, &$mbox_name, $maxlength, &$select, $realnames=false, $nestLevel=0)
-  {
-  $idx = 0;
+{
   $out = '';
-  foreach ($arrFolders as $key=>$folder)
-    {
+
+  foreach ($arrFolders as $key=>$folder) {
     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);
-      }
+    }
 
     $select->add(str_repeat('&nbsp;', $nestLevel*4) . $foldername, $folder['id']);
 
     if (!empty($folder['folders']))
       $out .= rcmail_render_folder_tree_select($folder['folders'], $mbox_name, $maxlength, $select, $realnames, $nestLevel+1);
-
-    $idx++;
-    }
+  }
 
   return $out;
-  }
+}
 
 
 /**
@@ -1610,8 +1495,7 @@
 
   $quota = rcmail_quota_content($attrib);
 
-  $OUTPUT->add_script('$(document).ready(function(){
-	rcmail.set_quota('.json_serialize($quota).')});', 'foot');
+  $OUTPUT->add_script('rcmail.set_quota('.json_serialize($quota).');', 'docready');
 
   return html::span($attrib, '');
 }
@@ -1697,7 +1581,7 @@
 {
   global $RCMAIL, $CONFIG;
 
-  $hook = $RCMAIL->plugins->exec_hook('hmtl_editor', array('mode' => $mode));
+  $hook = $RCMAIL->plugins->exec_hook('html_editor', array('mode' => $mode));
 
   if ($hook['abort'])
     return;  
@@ -1794,7 +1678,6 @@
 }
 
 
-
 /**
  * Replaces hostname variables
  *
@@ -1806,14 +1689,20 @@
 {
   // %n - host
   $n = preg_replace('/:\d+$/', '', $_SERVER['SERVER_NAME']);
-  // %d - domain name without first part, e.g. %d=mail.domain.tld, %m=domain.tld
+  // %d - domain name without first part, e.g. %n=mail.domain.tld, %d=domain.tld
   $d = preg_replace('/^[^\.]+\./', '', $n);
   // %h - IMAP host
   $h = $_SESSION['imap_host'] ? $_SESSION['imap_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;
+  }
 
-  $name = str_replace(array('%n', '%d', '%h', '%z'), array($n, $d, $h, $z), $name);
+  $name = str_replace(array('%n', '%d', '%h', '%z', '%s'), array($n, $d, $h, $z, $s[2]), $name);
   return $name;
 }
 
@@ -1945,6 +1834,178 @@
 }
 
 
+/****** 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',
+    $RCMAIL->user->get_username(), $RCMAIL->user->ID, rcmail_remote_ip()));
+}
+
+
+/**
+ * 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
  *
@@ -1965,13 +2026,13 @@
 
     // report bug (if not incompatible browser)
     if ($log && $arg['type'] && $arg['message'])
-        log_bug($arg);
+        rcube_log_bug($arg);
 
     // display error page and terminate script
     if ($terminate) {
         $ERROR_CODE = $arg['code'];
         $ERROR_MESSAGE = $arg['message'];
-        include('program/steps/utils/error.inc');
+        include INSTALL_PATH . 'program/steps/utils/error.inc';
         exit;
     }
 }
@@ -1985,13 +2046,20 @@
  * @return void
  * @see raise_error()
  */
-function log_bug($arg_arr)
+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 ($CONFIG['debug_level'] & 1) {
+    if ($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,
@@ -2006,13 +2074,13 @@
         }
     }
 
-    // resport the bug to the global bug reporting system
-    if ($CONFIG['debug_level'] & 2) {
+    // report the bug to the global bug reporting system
+    if ($level & 2) {
         // TODO: Send error via HTTP
     }
 
     // show error if debug_mode is on
-    if ($CONFIG['debug_level'] & 4) {
+    if ($level & 4) {
         print "<b>$program Error";
 
         if (!empty($arg_arr['file']) && !empty($arg_arr['line']))

--
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