From 4daaf297478aa66eb359e2989d729d98c3f45793 Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Fri, 16 Sep 2011 07:37:44 -0400
Subject: [PATCH] - Fix default folders settings  (according to namespaces) for new users too

---
 program/include/rcube_imap_generic.php |  805 ++++++++++++++++++++++++++++++++++----------------------
 1 files changed, 486 insertions(+), 319 deletions(-)

diff --git a/program/include/rcube_imap_generic.php b/program/include/rcube_imap_generic.php
index cc590e0..be520d3 100644
--- a/program/include/rcube_imap_generic.php
+++ b/program/include/rcube_imap_generic.php
@@ -48,25 +48,20 @@
     public $encoding;
     public $charset;
     public $ctype;
-    public $flags;
     public $timestamp;
-    public $body_structure;
+    public $bodystructure;
     public $internaldate;
     public $references;
     public $priority;
     public $mdn_to;
-    public $mdn_sent = false;
-    public $is_draft = false;
+
+    public $flags;
+    public $mdnsent = false;
     public $seen = false;
     public $deleted = false;
-    public $recent = false;
     public $answered = false;
     public $forwarded = false;
-    public $junk = false;
     public $flagged = false;
-    public $has_children = false;
-    public $depth = 0;
-    public $unread_children = 0;
     public $others = array();
 }
 
@@ -87,11 +82,11 @@
     public $errornum;
     public $result;
     public $resultcode;
+    public $selected;
     public $data = array();
     public $flags = array(
         'SEEN'     => '\\Seen',
         'DELETED'  => '\\Deleted',
-        'RECENT'   => '\\Recent',
         'ANSWERED' => '\\Answered',
         'DRAFT'    => '\\Draft',
         'FLAGGED'  => '\\Flagged',
@@ -100,7 +95,6 @@
         '*'        => '\\*',
     );
 
-    private $selected;
     private $fp;
     private $host;
     private $logged = false;
@@ -109,6 +103,7 @@
     private $prefs;
     private $cmd_tag;
     private $cmd_num = 0;
+    private $resourceid;
     private $_debug = false;
     private $_debug_handler = false;
 
@@ -175,13 +170,15 @@
         if ($endln)
             $string .= "\r\n";
 
+
         $res = 0;
         if ($parts = preg_split('/(\{[0-9]+\}\r\n)/m', $string, -1, PREG_SPLIT_DELIM_CAPTURE)) {
             for ($i=0, $cnt=count($parts); $i<$cnt; $i++) {
-                if (preg_match('/^\{[0-9]+\}\r\n$/', $parts[$i+1])) {
+                if (preg_match('/^\{([0-9]+)\}\r\n$/', $parts[$i+1], $matches)) {
                     // LITERAL+ support
-                    if ($this->prefs['literal+'])
-                        $parts[$i+1] = preg_replace('/([0-9]+)/', '\\1+', $parts[$i+1]);
+                    if ($this->prefs['literal+']) {
+                        $parts[$i+1] = sprintf("{%d+}\r\n", $matches[1]);
+                    }
 
                     $bytes = $this->putLine($parts[$i].$parts[$i+1], false);
                     if ($bytes === false)
@@ -205,7 +202,6 @@
                 }
             }
         }
-
         return $res;
     }
 
@@ -213,43 +209,38 @@
     {
         $line = '';
 
-        if (!$this->fp) {
-            return NULL;
-        }
-
         if (!$size) {
             $size = 1024;
         }
 
         do {
-            if (feof($this->fp)) {
+            if ($this->eof()) {
                 return $line ? $line : NULL;
             }
 
             $buffer = fgets($this->fp, $size);
 
             if ($buffer === false) {
-                @fclose($this->fp);
-                $this->fp = null;
+                $this->closeSocket();
                 break;
             }
             if ($this->_debug) {
                 $this->debug('S: '. rtrim($buffer));
             }
             $line .= $buffer;
-        } while ($buffer[strlen($buffer)-1] != "\n");
+        } while (substr($buffer, -1) != "\n");
 
         return $line;
     }
 
-    function multLine($line, $escape=false)
+    function multLine($line, $escape = false)
     {
         $line = rtrim($line);
-        if (preg_match('/\{[0-9]+\}$/', $line)) {
-            $out = '';
+        if (preg_match('/\{([0-9]+)\}$/', $line, $m)) {
+            $out   = '';
+            $str   = substr($line, 0, -strlen($m[0]));
+            $bytes = $m[1];
 
-            preg_match_all('/(.*)\{([0-9]+)\}$/', $line, $a);
-            $bytes = $a[2][0];
             while (strlen($out) < $bytes) {
                 $line = $this->readBytes($bytes);
                 if ($line === NULL)
@@ -257,7 +248,7 @@
                 $out .= $line;
             }
 
-            $line = $a[1][0] . ($escape ? $this->escape($out) : $out);
+            $line = $str . ($escape ? $this->escape($out) : $out);
         }
 
         return $line;
@@ -267,7 +258,7 @@
     {
         $data = '';
         $len  = 0;
-        while ($len < $bytes && !feof($this->fp))
+        while ($len < $bytes && !$this->eof())
         {
             $d = fread($this->fp, $bytes-$len);
             if ($this->_debug) {
@@ -312,8 +303,7 @@
             } else if ($res == 'BAD') {
                 $this->errornum = self::ERROR_BAD;
             } else if ($res == 'BYE') {
-                @fclose($this->fp);
-                $this->fp = null;
+                $this->closeSocket();
                 $this->errornum = self::ERROR_BYE;
             }
 
@@ -339,6 +329,32 @@
         return self::ERROR_UNKNOWN;
     }
 
+    private function eof()
+    {
+        if (!is_resource($this->fp)) {
+            return true;
+        }
+
+        // If a connection opened by fsockopen() wasn't closed
+        // by the server, feof() will hang.
+        $start = microtime(true);
+
+        if (feof($this->fp) || 
+            ($this->prefs['timeout'] && (microtime(true) - $start > $this->prefs['timeout']))
+        ) {
+            $this->closeSocket();
+            return true;
+        }
+
+        return false;
+    }
+
+    private function closeSocket()
+    {
+        @fclose($this->fp);
+        $this->fp = null;
+    }
+
     function setError($code, $msg='')
     {
         $this->errornum = $code;
@@ -360,8 +376,7 @@
         }
         if ($error && preg_match('/^\* (BYE|BAD) /i', $string, $m)) {
             if (strtoupper($m[1]) == 'BYE') {
-                @fclose($this->fp);
-                $this->fp = null;
+                $this->closeSocket();
             }
             return true;
         }
@@ -701,11 +716,12 @@
             $host = $this->prefs['ssl_mode'] . '://' . $host;
         }
 
+        if ($this->prefs['timeout'] <= 0) {
+            $this->prefs['timeout'] = ini_get('default_socket_timeout');
+        }
+
         // Connect
-        if ($this->prefs['timeout'] > 0)
-            $this->fp = @fsockopen($host, $this->prefs['port'], $errno, $errstr, $this->prefs['timeout']);
-        else
-            $this->fp = @fsockopen($host, $this->prefs['port'], $errno, $errstr);
+        $this->fp = @fsockopen($host, $this->prefs['port'], $errno, $errstr, $this->prefs['timeout']);
 
         if (!$this->fp) {
             $this->setError(self::ERROR_BAD, sprintf("Could not connect to %s:%d: %s", $host, $this->prefs['port'], $errstr));
@@ -717,8 +733,13 @@
 
         $line = trim(fgets($this->fp, 8192));
 
-        if ($this->_debug && $line) {
-            $this->debug('S: '. $line);
+        if ($this->_debug) {
+            // set connection identifier for debug output
+            preg_match('/#([0-9]+)/', (string)$this->fp, $m);
+            $this->resourceid = strtoupper(substr(md5($m[1].$this->user.microtime()), 0, 4));
+
+            if ($line)
+                $this->debug('S: '. $line);
         }
 
         // Connected to wrong port or connection error?
@@ -848,19 +869,18 @@
             $this->readReply();
         }
 
-        @fclose($this->fp);
-        $this->fp = false;
+        $this->closeSocket();
     }
 
     /**
      * Executes SELECT command (if mailbox is already not in selected state)
      *
-     * @param string $mailbox Mailbox name
+     * @param string $mailbox      Mailbox name
+     * @param array  $qresync_data QRESYNC data (RFC5162)
      *
      * @return boolean True on success, false on error
-     * @access public
      */
-    function select($mailbox)
+    function select($mailbox, $qresync_data = null)
     {
         if (!strlen($mailbox)) {
             return false;
@@ -879,7 +899,21 @@
             }
         }
 */
-        list($code, $response) = $this->execute('SELECT', array($this->escape($mailbox)));
+        $params = array($this->escape($mailbox));
+
+        // QRESYNC data items
+        //    0. the last known UIDVALIDITY,
+        //    1. the last known modification sequence,
+        //    2. the optional set of known UIDs, and
+        //    3. an optional parenthesized list of known sequence ranges and their
+        //       corresponding UIDs.
+        if (!empty($qresync_data)) {
+            if (!empty($qresync_data[2]))
+                $qresync_data[2] = self::compressMessageSet($qresync_data[2]);
+            $params[] = array('QRESYNC', $qresync_data);
+        }
+
+        list($code, $response) = $this->execute('SELECT', $params);
 
         if ($code == self::ERROR_OK) {
             $response = explode("\r\n", $response);
@@ -887,11 +921,39 @@
                 if (preg_match('/^\* ([0-9]+) (EXISTS|RECENT)$/i', $line, $m)) {
                     $this->data[strtoupper($m[2])] = (int) $m[1];
                 }
-                else if (preg_match('/^\* OK \[(UIDNEXT|UIDVALIDITY|UNSEEN) ([0-9]+)\]/i', $line, $match)) {
-                    $this->data[strtoupper($match[1])] = (int) $match[2];
+                else if (preg_match('/^\* OK \[/i', $line, $match)) {
+                    $line = substr($line, 6);
+                    if (preg_match('/^(UIDNEXT|UIDVALIDITY|UNSEEN) ([0-9]+)/i', $line, $match)) {
+                        $this->data[strtoupper($match[1])] = (int) $match[2];
+                    }
+                    else if (preg_match('/^(HIGHESTMODSEQ) ([0-9]+)/i', $line, $match)) {
+                        $this->data[strtoupper($match[1])] = (string) $match[2];
+                    }
+                    else if (preg_match('/^(NOMODSEQ)/i', $line, $match)) {
+                        $this->data[strtoupper($match[1])] = true;
+                    }
+                    else if (preg_match('/^PERMANENTFLAGS \(([^\)]+)\)/iU', $line, $match)) {
+                        $this->data['PERMANENTFLAGS'] = explode(' ', $match[1]);
+                    }
                 }
-                else if (preg_match('/^\* OK \[PERMANENTFLAGS \(([^\)]+)\)\]/iU', $line, $match)) {
-                    $this->data['PERMANENTFLAGS'] = explode(' ', $match[1]);
+                // QRESYNC FETCH response (RFC5162)
+                else if (preg_match('/^\* ([0-9+]) FETCH/i', $line, $match)) {
+                    $line       = substr($line, strlen($match[0]));
+                    $fetch_data = $this->tokenizeResponse($line, 1);
+                    $data       = array('id' => $match[1]);
+
+                    for ($i=0, $size=count($fetch_data); $i<$size; $i+=2) {
+                        $data[strtolower($fetch_data[$i])] = $fetch_data[$i+1];
+                    }
+
+                    $this->data['QRESYNC'][$data['uid']] = $data;
+                }
+                // QRESYNC VANISHED response (RFC5162)
+                else if (preg_match('/^\* VANISHED [()EARLIER]*/i', $line, $match)) {
+                    $line   = substr($line, strlen($match[0]));
+                    $v_data = $this->tokenizeResponse($line, 1);
+
+                    $this->data['VANISHED'] = $v_data;
                 }
             }
 
@@ -913,7 +975,6 @@
      *                        in RFC3501: UIDNEXT, UIDVALIDITY, RECENT
      *
      * @return array Status item-value hash
-     * @access public
      * @since 0.5-beta
      */
     function status($mailbox, $items=array())
@@ -938,8 +999,18 @@
 
             list($mbox, $items) = $this->tokenizeResponse($response, 2);
 
+            // Fix for #1487859. Some buggy server returns not quoted
+            // folder name with spaces. Let's try to handle this situation
+            if (!is_array($items) && ($pos = strpos($response, '(')) !== false) {
+                $response = substr($response, $pos);
+                $items = $this->tokenizeResponse($response, 1);
+                if (!is_array($items)) {
+                    return $result;
+                }
+            }
+
             for ($i=0, $len=count($items); $i<$len; $i += 2) {
-                $result[$items[$i]] = (int) $items[$i+1];
+                $result[$items[$i]] = $items[$i+1];
             }
 
             $this->data['STATUS:'.$mailbox] = $result;
@@ -957,7 +1028,6 @@
      * @param string $messages Message UIDs to expunge
      *
      * @return boolean True on success, False on error
-     * @access public
      */
     function expunge($mailbox, $messages=NULL)
     {
@@ -990,7 +1060,6 @@
      * Executes CLOSE command
      *
      * @return boolean True on success, False on error
-     * @access public
      * @since 0.5
      */
     function close()
@@ -1011,7 +1080,6 @@
      * @param string $mailbox Mailbox name
      *
      * @return boolean True on success, False on error
-     * @access public
      */
     function subscribe($mailbox)
     {
@@ -1027,7 +1095,6 @@
      * @param string $mailbox Mailbox name
      *
      * @return boolean True on success, False on error
-     * @access public
      */
     function unsubscribe($mailbox)
     {
@@ -1043,7 +1110,6 @@
      * @param string $mailbox Mailbox name
      *
      * @return boolean True on success, False on error
-     * @access public
      */
     function deleteFolder($mailbox)
     {
@@ -1059,7 +1125,6 @@
      * @param string $mailbox Mailbox name
      *
      * @return boolean True on success, False on error
-     * @access public
      */
     function clearFolder($mailbox)
     {
@@ -1084,7 +1149,6 @@
      * @param string $mailbox Mailbox name
      *
      * @return int Number of messages, False on error
-     * @access public
      */
     function countMessages($mailbox, $refresh = false)
     {
@@ -1117,7 +1181,6 @@
      * @param string $mailbox Mailbox name
      *
      * @return int Number of messages, False on error
-     * @access public
      */
     function countRecent($mailbox)
     {
@@ -1140,7 +1203,6 @@
      * @param string $mailbox Mailbox name
      *
      * @return int Number of messages, False on error
-     * @access public
      */
     function countUnseen($mailbox)
     {
@@ -1171,15 +1233,14 @@
      * @param array $items Client identification information key/value hash
      *
      * @return array Server identification information key/value hash
-     * @access public
      * @since 0.6
      */
     function id($items=array())
     {
         if (is_array($items) && !empty($items)) {
             foreach ($items as $key => $value) {
-                $args[] = $this->escape($key);
-                $args[] = $this->escape($value);
+                $args[] = $this->escape($key, true);
+                $args[] = $this->escape($value, true);
             }
         }
 
@@ -1190,12 +1251,43 @@
 
         if ($code == self::ERROR_OK && preg_match('/\* ID /i', $response)) {
             $response = substr($response, 5); // remove prefix "* ID "
-            $items    = $this->tokenizeResponse($response);
+            $items    = $this->tokenizeResponse($response, 1);
             $result   = null;
 
             for ($i=0, $len=count($items); $i<$len; $i += 2) {
                 $result[$items[$i]] = $items[$i+1];
             }
+
+            return $result;
+        }
+
+        return false;
+    }
+
+    /**
+     * Executes ENABLE command (RFC5161)
+     *
+     * @param mixed $extension Extension name to enable (or array of names)
+     *
+     * @return array|bool List of enabled extensions, False on error
+     * @since 0.6
+     */
+    function enable($extension)
+    {
+        if (empty($extension))
+            return false;
+
+        if (!$this->hasCapability('ENABLE'))
+            return false;
+
+        if (!is_array($extension))
+            $extension = array($extension);
+
+        list($code, $response) = $this->execute('ENABLE', $extension);
+
+        if ($code == self::ERROR_OK && preg_match('/\* ENABLED /i', $response)) {
+            $response = substr($response, 10); // remove prefix "* ENABLED "
+            $result   = (array) $this->tokenizeResponse($response);
 
             return $result;
         }
@@ -1344,7 +1436,7 @@
                         $result[$id] = '';
                     }
                 } else if ($mode == 2) {
-                    if (preg_match('/\((UID|RFC822\.SIZE) ([0-9]+)/', $line, $matches)) {
+                    if (preg_match('/(UID|RFC822\.SIZE) ([0-9]+)/', $line, $matches)) {
                         $result[$id] = trim($matches[2]);
                     } else {
                         $result[$id] = 0;
@@ -1440,7 +1532,6 @@
      * @param int    $uid     Message unique identifier (UID)
      *
      * @return int Message sequence identifier
-     * @access public
      */
     function UID2ID($mailbox, $uid)
     {
@@ -1460,12 +1551,11 @@
      * @param int    $uid     Message sequence identifier
      *
      * @return int Message unique identifier
-     * @access public
      */
     function ID2UID($mailbox, $id)
     {
         if (empty($id) || $id < 0) {
-            return 	null;
+            return null;
         }
 
         if (!$this->select($mailbox)) {
@@ -1483,46 +1573,58 @@
 
     function fetchUIDs($mailbox, $message_set=null)
     {
-        if (is_array($message_set))
-            $message_set = join(',', $message_set);
-        else if (empty($message_set))
+        if (empty($message_set))
             $message_set = '1:*';
 
         return $this->fetchHeaderIndex($mailbox, $message_set, 'UID', false);
     }
 
-    function fetchHeaders($mailbox, $message_set, $uidfetch=false, $bodystr=false, $add='')
+    /**
+     * FETCH command (RFC3501)
+     *
+     * @param string $mailbox     Mailbox name
+     * @param mixed  $message_set Message(s) sequence identifier(s) or UID(s)
+     * @param bool   $is_uid      True if $message_set contains UIDs
+     * @param array  $query_items FETCH command data items
+     * @param string $mod_seq     Modification sequence for CHANGEDSINCE (RFC4551) query
+     * @param bool   $vanished    Enables VANISHED parameter (RFC5162) for CHANGEDSINCE query
+     *
+     * @return array List of rcube_mail_header elements, False on error
+     * @since 0.6
+     */
+    function fetch($mailbox, $message_set, $is_uid = false, $query_items = array(),
+        $mod_seq = null, $vanished = false)
     {
-        $result = array();
-
         if (!$this->select($mailbox)) {
             return false;
         }
 
         $message_set = $this->compressMessageSet($message_set);
+        $result      = array();
 
-        if ($add)
-            $add = ' '.trim($add);
-
-        /* FETCH uid, size, flags and headers */
         $key      = $this->nextTag();
-        $request  = $key . ($uidfetch ? ' UID' : '') . " FETCH $message_set ";
-        $request .= "(UID RFC822.SIZE FLAGS INTERNALDATE ";
-        if ($bodystr)
-            $request .= "BODYSTRUCTURE ";
-        $request .= "BODY.PEEK[HEADER.FIELDS (DATE FROM TO SUBJECT CONTENT-TYPE ";
-        $request .= "LIST-POST DISPOSITION-NOTIFICATION-TO".$add.")])";
+        $request  = $key . ($is_uid ? ' UID' : '') . " FETCH $message_set ";
+        $request .= "(" . implode(' ', $query_items) . ")";
+
+        if ($mod_seq !== null && $this->hasCapability('CONDSTORE')) {
+            $request .= " (CHANGEDSINCE $mod_seq" . ($vanished ? " VANISHED" : '') .")";
+        }
 
         if (!$this->putLine($request)) {
             $this->setError(self::ERROR_COMMAND, "Unable to send command: $request");
             return false;
         }
+
         do {
             $line = $this->readLine(4096);
-            $line = $this->multLine($line);
 
             if (!$line)
                 break;
+
+            // Sample reply line:
+            // * 321 FETCH (UID 2417 RFC822.SIZE 2730 FLAGS (\Seen)
+            // INTERNALDATE "16-Nov-2008 21:08:46 +0100" BODYSTRUCTURE (...)
+            // BODY[HEADER.FIELDS ...
 
             if (preg_match('/^\* ([0-9]+) FETCH/', $line, $m)) {
                 $id = intval($m[1]);
@@ -1533,121 +1635,117 @@
                 $result[$id]->messageID = 'mid:' . $id;
 
                 $lines = array();
-                $ln = 0;
+                $line  = substr($line, strlen($m[0]) + 2);
+                $ln    = 0;
 
-                // Sample reply line:
-                // * 321 FETCH (UID 2417 RFC822.SIZE 2730 FLAGS (\Seen)
-                // INTERNALDATE "16-Nov-2008 21:08:46 +0100" BODYSTRUCTURE (...)
-                // BODY[HEADER.FIELDS ...
+                // get complete entry
+                while (preg_match('/\{([0-9]+)\}\r\n$/', $line, $m)) {
+                    $bytes = $m[1];
+                    $out   = '';
 
-                if (preg_match('/^\* [0-9]+ FETCH \((.*) BODY/sU', $line, $matches)) {
-                    $str = $matches[1];
-
-                    // swap parents with quotes, then explode
-                    $str = preg_replace('/[()]/', '"', $str);
-                    $a = rcube_explode_quoted_string(' ', $str);
-
-                    // did we get the right number of replies?
-                    $parts_count = count($a);
-                    if ($parts_count>=6) {
-                        for ($i=0; $i<$parts_count; $i=$i+2) {
-                            if ($a[$i] == 'UID') {
-                                $result[$id]->uid = intval($a[$i+1]);
-                            }
-                            else if ($a[$i] == 'RFC822.SIZE') {
-                                $result[$id]->size = intval($a[$i+1]);
-                            }
-                            else if ($a[$i] == 'INTERNALDATE') {
-                                $time_str = $a[$i+1];
-                            }
-                            else if ($a[$i] == 'FLAGS') {
-                                $flags_str = $a[$i+1];
-                            }
-                        }
-
-                        $time_str = str_replace('"', '', $time_str);
-
-                        // if time is gmt...
-                        $time_str = str_replace('GMT','+0000',$time_str);
-
-                        $result[$id]->internaldate = $time_str;
-                        $result[$id]->timestamp    = $this->StrToTime($time_str);
-                        $result[$id]->date         = $time_str;
+                    while (strlen($out) < $bytes) {
+                        $out = $this->readBytes($bytes);
+                        if ($out === NULL)
+                            break;
+                        $line .= $out;
                     }
 
-                    // BODYSTRUCTURE
-                    if ($bodystr) {
-                        while (!preg_match('/ BODYSTRUCTURE (.*) BODY\[HEADER.FIELDS/sU', $line, $m)) {
-                            $line2 = $this->readLine(1024);
-                            $line .= $this->multLine($line2, true);
-                        }
-                        $result[$id]->body_structure = $m[1];
-                    }
+                    $str = $this->readLine(4096);
+                    if ($str === false)
+                        break;
 
-                    // the rest of the result
-                    if (preg_match('/ BODY\[HEADER.FIELDS \(.*?\)\]\s*(.*)$/s', $line, $m)) {
-                        $reslines = explode("\n", trim($m[1], '"'));
-                        // re-parse (see below)
-                        foreach ($reslines as $resln) {
-                            if (ord($resln[0])<=32) {
-                                $lines[$ln] .= (empty($lines[$ln])?'':"\n").trim($resln);
-                            } else {
-                                $lines[++$ln] = trim($resln);
+                    $line .= $str;
+                }
+
+                // Tokenize response and assign to object properties
+                while (list($name, $value) = $this->tokenizeResponse($line, 2)) {
+                    if ($name == 'UID') {
+                        $result[$id]->uid = intval($value);
+                    }
+                    else if ($name == 'RFC822.SIZE') {
+                        $result[$id]->size = intval($value);
+                    }
+                    else if ($name == 'RFC822.TEXT') {
+                        $result[$id]->body = $value;
+                    }
+                    else if ($name == 'INTERNALDATE') {
+                        $result[$id]->internaldate = $value;
+                        $result[$id]->date         = $value;
+                        $result[$id]->timestamp    = $this->StrToTime($value);
+                    }
+                    else if ($name == 'FLAGS') {
+                        if (!empty($value)) {
+                            foreach ((array)$value as $flag) {
+                                $flag = str_replace('\\', '', $flag);
+
+                                switch (strtoupper($flag)) {
+                                case 'SEEN':
+                                    $result[$id]->seen = true;
+                                    break;
+                                case 'DELETED':
+                                    $result[$id]->deleted = true;
+                                    break;
+                                case 'ANSWERED':
+                                    $result[$id]->answered = true;
+                                    break;
+                                case '$FORWARDED':
+                                    $result[$id]->forwarded = true;
+                                    break;
+                                case '$MDNSENT':
+                                    $result[$id]->mdnsent = true;
+                                    break;
+                                case 'FLAGGED':
+                                    $result[$id]->flagged = true;
+                                    break;
+                                default:
+                                    $result[$id]->flags[] = $flag;
+                                    break;
+                                }
                             }
                         }
+                    }
+                    else if ($name == 'MODSEQ') {
+                        $result[$id]->modseq = $value[0];
+                    }
+                    else if ($name == 'ENVELOPE') {
+                        $result[$id]->envelope = $value;
+                    }
+                    else if ($name == 'BODYSTRUCTURE' || ($name == 'BODY' && count($value) > 2)) {
+                        if (!is_array($value[0]) && (strtolower($value[0]) == 'message' && strtolower($value[1]) == 'rfc822')) {
+                            $value = array($value);
+                        }
+                        $result[$id]->bodystructure = $value;
+                    }
+                    else if ($name == 'RFC822') {
+                        $result[$id]->body = $value;
+                    }
+                    else if ($name == 'BODY') {
+                        $body = $this->tokenizeResponse($line, 1);
+                        if ($value[0] == 'HEADER.FIELDS')
+                            $headers = $body;
+                        else if (!empty($value))
+                            $result[$id]->bodypart[$value[0]] = $body;
+                        else
+                            $result[$id]->body = $body;
                     }
                 }
 
-                // Start parsing headers.  The problem is, some header "lines" take up multiple lines.
-                // So, we'll read ahead, and if the one we're reading now is a valid header, we'll
-                // process the previous line.  Otherwise, we'll keep adding the strings until we come
-                // to the next valid header line.
-
-                do {
-                    $line = rtrim($this->readLine(300), "\r\n");
-
-                    // The preg_match below works around communigate imap, which outputs " UID <number>)".
-                    // Without this, the while statement continues on and gets the "FH0 OK completed" message.
-                    // If this loop gets the ending message, then the outer loop does not receive it from radline on line 1249.
-                    // This in causes the if statement on line 1278 to never be true, which causes the headers to end up missing
-                    // If the if statement was changed to pick up the fh0 from this loop, then it causes the outer loop to spin
-                    // An alternative might be:
-                    // if (!preg_match("/:/",$line) && preg_match("/\)$/",$line)) break;
-                    // however, unsure how well this would work with all imap clients.
-                    if (preg_match("/^\s*UID [0-9]+\)$/", $line)) {
-                        break;
-                    }
-
-                    // handle FLAGS reply after headers (AOL, Zimbra?)
-                    if (preg_match('/\s+FLAGS \((.*)\)\)$/', $line, $matches)) {
-                        $flags_str = $matches[1];
-                        break;
-                    }
-
-                    if (ord($line[0])<=32) {
-                        $lines[$ln] .= (empty($lines[$ln])?'':"\n").trim($line);
-                    } else {
-                        $lines[++$ln] = trim($line);
-                    }
-                // patch from "Maksim Rubis" <siburny@hotmail.com>
-                } while ($line[0] != ')' && !$this->startsWith($line, $key, true));
-
-                if (strncmp($line, $key, strlen($key))) {
-                    // process header, fill rcube_mail_header obj.
-                    // initialize
-                    if (is_array($headers)) {
-                        reset($headers);
-                        while (list($k, $bar) = each($headers)) {
-                            $headers[$k] = '';
+                // create array with header field:data
+                if (!empty($headers)) {
+                    $headers = explode("\n", trim($headers));
+                    foreach ($headers as $hid => $resln) {
+                        if (ord($resln[0]) <= 32) {
+                            $lines[$ln] .= (empty($lines[$ln]) ? '' : "\n") . trim($resln);
+                        } else {
+                            $lines[++$ln] = trim($resln);
                         }
                     }
 
-                    // create array with header field:data
                     while (list($lines_key, $str) = each($lines)) {
-                        list($field, $string) = $this->splitHeaderLine($str);
+                        list($field, $string) = explode(':', $str, 2);
 
                         $field  = strtolower($field);
-                        $string = preg_replace('/\n\s*/', ' ', $string);
+                        $string = preg_replace('/\n[\t\s]*/', ' ', trim($string));
 
                         switch ($field) {
                         case 'date';
@@ -1706,48 +1804,44 @@
                                 $result[$id]->others[$field] = $string;
                             }
                             break;
-                        } // end switch ()
-                    } // end while ()
-                }
-
-                // process flags
-                if (!empty($flags_str)) {
-                    $flags_str = preg_replace('/[\\\"]/', '', $flags_str);
-                    $flags_a   = explode(' ', $flags_str);
-
-                    if (is_array($flags_a)) {
-                        foreach($flags_a as $flag) {
-                            $flag = strtoupper($flag);
-                            if ($flag == 'SEEN') {
-                                $result[$id]->seen = true;
-                            } else if ($flag == 'DELETED') {
-                                $result[$id]->deleted = true;
-                            } else if ($flag == 'RECENT') {
-                                $result[$id]->recent = true;
-                            } else if ($flag == 'ANSWERED') {
-                                $result[$id]->answered = true;
-                            } else if ($flag == '$FORWARDED') {
-                                $result[$id]->forwarded = true;
-                            } else if ($flag == 'DRAFT') {
-                                $result[$id]->is_draft = true;
-                            } else if ($flag == '$MDNSENT') {
-                                $result[$id]->mdn_sent = true;
-                            } else if ($flag == 'FLAGGED') {
-                                 $result[$id]->flagged = true;
-                            }
                         }
-                        $result[$id]->flags = $flags_a;
                     }
                 }
             }
+
+            // VANISHED response (QRESYNC RFC5162)
+            // Sample: * VANISHED (EARLIER) 300:310,405,411
+
+            else if (preg_match('/^\* VANISHED [EARLIER]*/i', $line, $match)) {
+                $line   = substr($line, strlen($match[0]));
+                $v_data = $this->tokenizeResponse($line, 1);
+
+                $this->data['VANISHED'] = $v_data;
+            }
+
         } while (!$this->startsWith($line, $key, true));
+
+        return $result;
+    }
+
+    function fetchHeaders($mailbox, $message_set, $is_uid = false, $bodystr = false, $add = '')
+    {
+        $query_items = array('UID', 'RFC822.SIZE', 'FLAGS', 'INTERNALDATE');
+        if ($bodystr)
+            $query_items[] = 'BODYSTRUCTURE';
+        $query_items[] = 'BODY.PEEK[HEADER.FIELDS ('
+            . 'DATE FROM TO SUBJECT CONTENT-TYPE CC REPLY-TO LIST-POST DISPOSITION-NOTIFICATION-TO X-PRIORITY'
+            . ($add ? ' ' . trim($add) : '')
+            . ')]';
+
+        $result = $this->fetch($mailbox, $message_set, $is_uid, $query_items);
 
         return $result;
     }
 
     function fetchHeader($mailbox, $id, $uidfetch=false, $bodystr=false, $add='')
     {
-        $a  = $this->fetchHeaders($mailbox, $id, $uidfetch, $bodystr, $add);
+        $a = $this->fetchHeaders($mailbox, $id, $uidfetch, $bodystr, $add);
         if (is_array($a)) {
             return array_shift($a);
         }
@@ -2027,6 +2121,7 @@
             $params .= 'RETURN (' . implode(' ', $items) . ')';
         }
         if (!empty($criteria)) {
+            $modseq = stripos($criteria, 'MODSEQ') !== false;
             $params .= ($params ? ' ' : '') . $criteria;
         }
         else {
@@ -2038,11 +2133,18 @@
 
         if ($code == self::ERROR_OK) {
             // remove prefix...
-            $response = substr($response, stripos($response, 
+            $response = substr($response, stripos($response,
                 $esearch ? '* ESEARCH' : '* SEARCH') + ($esearch ? 10 : 9));
             // ...and unilateral untagged server responses
             if ($pos = strpos($response, '*')) {
                 $response = rtrim(substr($response, 0, $pos));
+            }
+
+            // remove MODSEQ response
+            if ($modseq) {
+                if (preg_match('/\(MODSEQ ([0-9]+)\)$/', $response, $m)) {
+                    $response = substr($response, 0, -strlen($m[0]));
+                }
             }
 
             if ($esearch) {
@@ -2051,7 +2153,7 @@
 
                 $result = array();
                 for ($i=0; $i<count($items); $i++) {
-                    // If the SEARCH results in no matches, the server MUST NOT
+                    // If the SEARCH returns no matches, the server MUST NOT
                     // include the item result option in the ESEARCH response
                     if ($ret = $this->tokenizeResponse($response, 2)) {
                         list ($name, $value) = $ret;
@@ -2100,7 +2202,6 @@
      *
      * @return array List of mailboxes or hash of options if $status_opts argument
      *               is non-empty.
-     * @access public
      */
     function listMailboxes($ref, $mailbox, $status_opts=array(), $select_opts=array())
     {
@@ -2116,7 +2217,6 @@
      *
      * @return array List of mailboxes or hash of options if $status_opts argument
      *               is non-empty.
-     * @access public
      */
     function listSubscribed($ref, $mailbox, $status_opts=array())
     {
@@ -2136,7 +2236,6 @@
      *
      * @return array List of mailboxes or hash of options if $status_ops argument
      *               is non-empty.
-     * @access private
      */
     private function _listMailboxes($ref, $mailbox, $subscribed=false,
         $status_opts=array(), $select_opts=array())
@@ -2170,7 +2269,7 @@
             while ($this->tokenizeResponse($response, 1) == '*') {
                 $cmd = strtoupper($this->tokenizeResponse($response, 1));
                 // * LIST (<options>) <delimiter> <mailbox>
-                if (!$lstatus || $cmd == 'LIST' || $cmd == 'LSUB') {
+                if ($cmd == 'LIST' || $cmd == 'LSUB') {
                     list($opts, $delim, $mailbox) = $this->tokenizeResponse($response, 3);
 
                     // Add to result array
@@ -2199,6 +2298,14 @@
                         $folders[$mailbox][$name] = $value;
                     }
                 }
+                // other untagged response line, skip it
+                else {
+                    $response = ltrim($response);
+                    if (($position = strpos($response, "\n")) !== false)
+                        $response = substr($response, $position+1);
+                    else
+                        $response = '';
+                }
             }
 
             return $folders;
@@ -2207,7 +2314,7 @@
         return false;
     }
 
-    function fetchMIMEHeaders($mailbox, $id, $parts, $mime=true)
+    function fetchMIMEHeaders($mailbox, $uid, $parts, $mime=true)
     {
         if (!$this->select($mailbox)) {
             return false;
@@ -2225,7 +2332,7 @@
             $peeks[] = "BODY.PEEK[$part.$type]";
         }
 
-        $request = "$key FETCH $id (" . implode(' ', $peeks) . ')';
+        $request = "$key UID FETCH $uid (" . implode(' ', $peeks) . ')';
 
         // send request
         if (!$this->putLine($request)) {
@@ -2239,7 +2346,7 @@
 
             if (preg_match('/BODY\[([0-9\.]+)\.'.$type.'\]/', $line, $matches)) {
                 $idx = $matches[1];
-                $result[$idx] = preg_replace('/^(\* '.$id.' FETCH \()?\s*BODY\['.$idx.'\.'.$type.'\]\s+/', '', $line);
+                $result[$idx] = preg_replace('/^(\* [0-9]+ FETCH \()?\s*BODY\['.$idx.'\.'.$type.'\]\s+/', '', $line);
                 $result[$idx] = trim($result[$idx], '"');
                 $result[$idx] = rtrim($result[$idx], "\t\r\n\0\x0B");
             }
@@ -2363,8 +2470,6 @@
                 } else if ($mode == 2) {
                     $line = rtrim($line, "\t\r\0\x0B");
                     $line = quoted_printable_decode($line);
-                    // Remove NULL characters (#1486189)
-                    $line = str_replace("\x00", '', $line);
                 // UUENCODE
                 } else if ($mode == 3) {
                     $line = rtrim($line, "\t\r\n\0\x0B");
@@ -2546,33 +2651,6 @@
         return false;
     }
 
-    function fetchStructureString($mailbox, $id, $is_uid=false)
-    {
-        if (!$this->select($mailbox)) {
-            return false;
-        }
-
-        $key = $this->nextTag();
-        $result = false;
-        $command = $key . ($is_uid ? ' UID' : '') ." FETCH $id (BODYSTRUCTURE)";
-
-        if ($this->putLine($command)) {
-            do {
-                $line = $this->readLine(5000);
-                $line = $this->multLine($line, true);
-                if (!preg_match("/^$key /", $line))
-                    $result .= $line;
-            } while (!$this->startsWith($line, $key, true, true));
-
-            $result = trim(substr($result, strpos($result, 'BODYSTRUCTURE')+13, -1));
-        }
-        else {
-            $this->setError(self::ERROR_COMMAND, "Unable to send command: $command");
-        }
-
-        return $result;
-    }
-
     function getQuota()
     {
         /*
@@ -2636,7 +2714,6 @@
      *
      * @return boolean True on success, False on failure
      *
-     * @access public
      * @since 0.5-beta
      */
     function setACL($mailbox, $user, $acl)
@@ -2660,7 +2737,6 @@
      *
      * @return boolean True on success, False on failure
      *
-     * @access public
      * @since 0.5-beta
      */
     function deleteACL($mailbox, $user)
@@ -2678,7 +2754,6 @@
      * @param string $mailbox Mailbox name
      *
      * @return array User-rights array on success, NULL on error
-     * @access public
      * @since 0.5-beta
      */
     function getACL($mailbox)
@@ -2719,7 +2794,6 @@
      * @param string $user    User name
      *
      * @return array List of user rights
-     * @access public
      * @since 0.5-beta
      */
     function listRights($mailbox, $user)
@@ -2751,7 +2825,6 @@
      * @param string $mailbox Mailbox name
      *
      * @return array MYRIGHTS response on success, NULL on error
-     * @access public
      * @since 0.5-beta
      */
     function myRights($mailbox)
@@ -2778,7 +2851,6 @@
      * @param array  $entries Entry-value array (use NULL value as NIL)
      *
      * @return boolean True on success, False on failure
-     * @access public
      * @since 0.5-beta
      */
     function setMetadata($mailbox, $entries)
@@ -2789,13 +2861,7 @@
         }
 
         foreach ($entries as $name => $value) {
-            if ($value === null) {
-                $value = 'NIL';
-            }
-            else {
-                $value = sprintf("{%d}\r\n%s", strlen($value), $value);
-            }
-            $entries[$name] = $this->escape($name) . ' ' . $value;
+            $entries[$name] = $this->escape($name) . ' ' . $this->escape($value);
         }
 
         $entries = implode(' ', $entries);
@@ -2814,7 +2880,6 @@
      *
      * @return boolean True on success, False on failure
      *
-     * @access public
      * @since 0.5-beta
      */
     function deleteMetadata($mailbox, $entries)
@@ -2844,7 +2909,6 @@
      *
      * @return array GETMETADATA result on success, NULL on error
      *
-     * @access public
      * @since 0.5-beta
      */
     function getMetadata($mailbox, $entries, $options=array())
@@ -2936,7 +3000,6 @@
      *                        three elements: entry name, attribute name, value
      *
      * @return boolean True on success, False on failure
-     * @access public
      * @since 0.5-beta
      */
     function setAnnotation($mailbox, $data)
@@ -2947,20 +3010,9 @@
         }
 
         foreach ($data as $entry) {
-            $name  = $entry[0];
-            $attr  = $entry[1];
-            $value = $entry[2];
-
-            if ($value === null) {
-                $value = 'NIL';
-            }
-            else {
-                $value = sprintf("{%d}\r\n%s", strlen($value), $value);
-            }
-
             // ANNOTATEMORE drafts before version 08 require quoted parameters
-            $entries[] = sprintf('%s (%s %s)',
-                $this->escape($name, true), $this->escape($attr, true), $value);
+            $entries[] = sprintf('%s (%s %s)', $this->escape($entry[0], true),
+                $this->escape($entry[1], true), $this->escape($entry[2], true));
         }
 
         $entries = implode(' ', $entries);
@@ -2979,7 +3031,6 @@
      *
      * @return boolean True on success, False on failure
      *
-     * @access public
      * @since 0.5-beta
      */
     function deleteAnnotation($mailbox, $data)
@@ -3001,7 +3052,6 @@
      *
      * @return array Annotations result on success, NULL on error
      *
-     * @access public
      * @since 0.5-beta
      */
     function getAnnotation($mailbox, $entries, $attribs)
@@ -3086,10 +3136,103 @@
     }
 
     /**
+     * Returns BODYSTRUCTURE for the specified message.
+     *
+     * @param string $mailbox Folder name
+     * @param int    $id      Message sequence number or UID
+     * @param bool   $is_uid  True if $id is an UID
+     *
+     * @return array/bool Body structure array or False on error.
+     * @since 0.6
+     */
+    function getStructure($mailbox, $id, $is_uid = false)
+    {
+        $result = $this->fetch($mailbox, $id, $is_uid, array('BODYSTRUCTURE'));
+        if (is_array($result)) {
+            $result = array_shift($result);
+            return $result->bodystructure;
+        }
+        return false;
+    }
+
+    static function getStructurePartType($structure, $part)
+    {
+	    $part_a = self::getStructurePartArray($structure, $part);
+	    if (!empty($part_a)) {
+		    if (is_array($part_a[0]))
+                return 'multipart';
+		    else if ($part_a[0])
+                return $part_a[0];
+	    }
+
+        return 'other';
+    }
+
+    static function getStructurePartEncoding($structure, $part)
+    {
+	    $part_a = self::getStructurePartArray($structure, $part);
+	    if ($part_a) {
+		    if (!is_array($part_a[0]))
+                return $part_a[5];
+	    }
+
+        return '';
+    }
+
+    static function getStructurePartCharset($structure, $part)
+    {
+	    $part_a = self::getStructurePartArray($structure, $part);
+	    if ($part_a) {
+		    if (is_array($part_a[0]))
+                return '';
+		    else {
+			    if (is_array($part_a[2])) {
+				    $name = '';
+				    while (list($key, $val) = each($part_a[2]))
+                        if (strcasecmp($val, 'charset') == 0)
+                            return $part_a[2][$key+1];
+			    }
+		    }
+	    }
+
+        return '';
+    }
+
+    static function getStructurePartArray($a, $part)
+    {
+	    if (!is_array($a)) {
+            return false;
+        }
+	    if (strpos($part, '.') > 0) {
+		    $original_part = $part;
+		    $pos = strpos($part, '.');
+		    $rest = substr($original_part, $pos+1);
+		    $part = substr($original_part, 0, $pos);
+		    if ((strcasecmp($a[0], 'message') == 0) && (strcasecmp($a[1], 'rfc822') == 0)) {
+			    $a = $a[8];
+		    }
+		    return self::getStructurePartArray($a[$part-1], $rest);
+	    }
+        else if ($part>0) {
+		    if (!is_array($a[0]) && (strcasecmp($a[0], 'message') == 0)
+                && (strcasecmp($a[1], 'rfc822') == 0)) {
+			    $a = $a[8];
+		    }
+		    if (is_array($a[$part-1]))
+                return $a[$part-1];
+		    else
+                return $a;
+	    }
+        else if (($part == 0) || (empty($part))) {
+		    return $a;
+	    }
+    }
+
+
+    /**
      * Creates next command identifier (tag)
      *
      * @return string Command identifier
-     * @access public
      * @since 0.5-beta
      */
     function nextTag()
@@ -3108,7 +3251,6 @@
      * @param int    $options   Execution options
      *
      * @return mixed Response code or list of response code and data
-     * @access public
      * @since 0.5-beta
      */
     function execute($command, $arguments=array(), $options=0)
@@ -3119,7 +3261,9 @@
         $response = $noresp ? null : '';
 
         if (!empty($arguments)) {
-            $query .= ' ' . implode(' ', $arguments);
+            foreach ($arguments as $arg) {
+                $query .= ' ' . self::r_implode($arg);
+            }
         }
 
         // Send command
@@ -3166,7 +3310,6 @@
      * @param int    $num  Number of tokens to return
      *
      * @return mixed Tokens array or string if $num=1
-     * @access public
      * @since 0.5-beta
      */
     static function tokenizeResponse(&$str, $num=0)
@@ -3187,7 +3330,7 @@
                 if (!is_numeric(($bytes = substr($str, 1, $epos - 1)))) {
                     // error
                 }
-                $result[] = substr($str, $epos + 3, $bytes);
+                $result[] = $bytes ? substr($str, $epos + 3, $bytes) : '';
                 // Advance the string
                 $str = substr($str, $epos + 3 + $bytes);
                 break;
@@ -3216,10 +3359,12 @@
 
             // Parenthesized list
             case '(':
+            case '[':
                 $str = substr($str, 1);
                 $result[] = self::tokenizeResponse($str);
                 break;
             case ')':
+            case ']':
                 $str = substr($str, 1);
                 return $result;
                 break;
@@ -3236,8 +3381,8 @@
                     break;
                 }
 
-                // excluded chars: SP, CTL, (, ), {, ", ], %
-                if (preg_match('/^([\x21\x23\x24\x26\x27\x2A-\x5C\x5E-\x7A\x7C-\x7E]+)/', $str, $m)) {
+                // excluded chars: SP, CTL, ), [, ]
+                if (preg_match('/^([^\x00-\x20\x29\x5B\x5D\x7F]+)/', $str, $m)) {
                     $result[] = $m[1] == 'NIL' ? NULL : $m[1];
                     $str = substr($str, strlen($m[1]));
                 }
@@ -3246,6 +3391,23 @@
         }
 
         return $num == 1 ? $result[0] : $result;
+    }
+
+    static function r_implode($element)
+    {
+        $string = '';
+
+        if (is_array($element)) {
+            reset($element);
+            while (list($key, $value) = each($element)) {
+                $string .= ' ' . self::r_implode($value);
+            }
+        }
+        else {
+            return $element;
+        }
+
+        return '(' . trim($string) . ')';
     }
 
     private function _xor($string, $string2)
@@ -3267,21 +3429,23 @@
      *
      * @return int Unix timestamp
      */
-    private function strToTime($date)
+    static function strToTime($date)
     {
-        $ts = (int) rcube_strtotime($date);
-        return $ts < 0 ? 0 : $ts;
-    }
+        // support non-standard "GMTXXXX" literal
+        $date = preg_replace('/GMT\s*([+-][0-9]+)/', '\\1', $date);
 
-    private function splitHeaderLine($string)
-    {
-        $pos = strpos($string, ':');
-        if ($pos>0) {
-            $res[0] = substr($string, 0, $pos);
-            $res[1] = trim(substr($string, $pos+1));
-            return $res;
+        // if date parsing fails, we have a date in non-rfc format
+        // remove token from the end and try again
+        while (($ts = intval(@strtotime($date))) <= 0) {
+            $d = explode(' ', $date);
+            array_pop($d);
+            if (empty($d)) {
+                break;
+            }
+            $date = implode(' ', $d);
         }
-        return $string;
+
+        return $ts < 0 ? 0 : $ts;
     }
 
     private function parseCapability($str, $trusted=false)
@@ -3303,34 +3467,35 @@
      * Escapes a string when it contains special characters (RFC3501)
      *
      * @param string  $string       IMAP string
-     * @param boolean $force_quotes Forces string quoting
+     * @param boolean $force_quotes Forces string quoting (for atoms)
      *
-     * @return string Escaped string
-     * @todo String literals, lists
+     * @return string String atom, quoted-string or string literal
+     * @todo lists
      */
     static function escape($string, $force_quotes=false)
     {
         if ($string === null) {
             return 'NIL';
         }
-        else if ($string === '') {
+        if ($string === '') {
             return '""';
         }
-        // need quoted-string? find special chars: SP, CTL, (, ), {, %, *, ", \, ]
-        // plus [ character as a workaround for DBMail's bug (#1487766)
-        else if ($force_quotes ||
-            preg_match('/([\x00-\x20\x28-\x29\x7B\x25\x2A\x22\x5B\x5C\x5D\x7F]+)/', $string)
-        ) {
-            return '"' . strtr($string, array('"'=>'\\"', '\\' => '\\\\')) . '"';
+        // atom-string (only safe characters)
+        if (!$force_quotes && !preg_match('/[\x00-\x20\x22\x28-\x2A\x5B-\x5D\x7B\x7D\x80-\xFF]/', $string)) {
+            return $string;
+        }
+        // quoted-string
+        if (!preg_match('/[\r\n\x00\x80-\xFF]/', $string)) {
+            return '"' . addcslashes($string, '\\"') . '"';
         }
 
-        // atom
-        return $string;
+        // literal-string
+        return sprintf("{%d}\r\n%s", strlen($string), $string);
     }
 
     static function unEscape($string)
     {
-        return strtr($string, array('\\"'=>'"', '\\\\' => '\\'));
+        return stripslashes($string);
     }
 
     /**
@@ -3338,7 +3503,6 @@
      *
      * @param   boolean $debug      New value for the debugging flag.
      *
-     * @access  public
      * @since   0.5-stable
      */
     function setDebug($debug, $handler = null)
@@ -3352,11 +3516,14 @@
      *
      * @param   string  $message    Debug mesage text.
      *
-     * @access  private
      * @since   0.5-stable
      */
     private function debug($message)
     {
+        if ($this->resourceid) {
+            $message = sprintf('[%s] %s', $this->resourceid, $message);
+        }
+
         if ($this->_debug_handler) {
             call_user_func_array($this->_debug_handler, array(&$this, $message));
         } else {

--
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