From bdab2c5faf8a2b311debce0b724a0b2df02aa60c Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Sun, 20 Sep 2009 06:25:14 -0400
Subject: [PATCH] - small code improvements

---
 program/include/rcube_imap.php |  375 ++++++++++++++++++++++++++++-------------------------
 1 files changed, 196 insertions(+), 179 deletions(-)

diff --git a/program/include/rcube_imap.php b/program/include/rcube_imap.php
index 831dff6..e094796 100644
--- a/program/include/rcube_imap.php
+++ b/program/include/rcube_imap.php
@@ -36,7 +36,7 @@
  *
  * @package    Mail
  * @author     Thomas Bruederli <roundcube@gmail.com>
- * @version    1.40
+ * @version    1.5
  * @link       http://ilohamail.org
  */
 class rcube_imap
@@ -69,7 +69,9 @@
   var $search_sort_field = '';  
   var $debug_level = 1;
   var $error_code = 0;
-  var $options = array('imap' => 'check');
+  var $options = array('auth_method' => 'check');
+  
+  private $host, $user, $pass, $port, $ssl;
 
 
   /**
@@ -101,19 +103,26 @@
     // check for Open-SSL support in PHP build
     if ($use_ssl && extension_loaded('openssl'))
       $ICL_SSL = $use_ssl == 'imaps' ? 'ssl' : $use_ssl;
-    else if ($use_ssl)
-      {
+    else if ($use_ssl) {
       raise_error(array('code' => 403, 'type' => 'imap', 'file' => __FILE__,
                         'message' => 'Open SSL not available;'), TRUE, FALSE);
       $port = 143;
-      }
+    }
 
     $ICL_PORT = $port;
     $IMAP_USE_INTERNAL_DATE = false;
+    
+    $attempt = 0;
+    do {
+      $data = rcmail::get_instance()->plugins->exec_hook('imap_connect', array('host' => $host, 'user' => $user, 'attempt' => ++$attempt));
+      if (!empty($data['pass']))
+        $pass = $data['pass'];
 
-    $this->conn = iil_Connect($host, $user, $pass, $this->options);
-    $this->host = $host;
-    $this->user = $user;
+      $this->conn = iil_Connect($data['host'], $data['user'], $pass, $this->options);
+    } while(!$this->conn && $data['retry']);
+
+    $this->host = $data['host'];
+    $this->user = $data['user'];
     $this->pass = $pass;
     $this->port = $port;
     $this->ssl = $use_ssl;
@@ -254,7 +263,7 @@
    */
   function set_mailbox($new_mbox)
     {
-    $mailbox = $this->_mod_mailbox($new_mbox);
+    $mailbox = $this->mod_mailbox($new_mbox);
 
     if ($this->mailbox == $mailbox)
       return;
@@ -330,7 +339,7 @@
    */
   function get_mailbox_name()
     {
-    return $this->conn ? $this->_mod_mailbox($this->mailbox, 'out') : '';
+    return $this->conn ? $this->mod_mailbox($this->mailbox, 'out') : '';
     }
 
 
@@ -398,7 +407,7 @@
 
     foreach ($a_mboxes as $mbox_row)
       {
-      $name = $this->_mod_mailbox($mbox_row, 'out');
+      $name = $this->mod_mailbox($mbox_row, 'out');
       if (strlen($name))
         $a_out[] = $name;
       }
@@ -421,7 +430,7 @@
    * @see     rcube_imap::list_mailboxes()
    * @access  private
    */
-  function _list_mailboxes($root='', $filter='*')
+  private function _list_mailboxes($root='', $filter='*')
     {
     $a_defaults = $a_out = array();
     
@@ -437,7 +446,7 @@
     }
     else{
         // retrieve list of folders from IMAP server
-        $a_folders = iil_C_ListSubscribed($this->conn, $this->_mod_mailbox($root), $filter);
+        $a_folders = iil_C_ListSubscribed($this->conn, $this->mod_mailbox($root), $filter);
     }
 
     
@@ -462,7 +471,7 @@
    */
   function messagecount($mbox_name='', $mode='ALL', $force=FALSE)
     {
-    $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+    $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
     return $this->_messagecount($mailbox, $mode, $force);
     }
 
@@ -473,7 +482,7 @@
    * @access  private
    * @see     rcube_imap::messagecount()
    */
-  function _messagecount($mailbox='', $mode='ALL', $force=FALSE)
+  private function _messagecount($mailbox='', $mode='ALL', $force=FALSE)
     {
     $a_mailbox_cache = FALSE;
     $mode = strtoupper($mode);
@@ -537,13 +546,14 @@
    * @param   int      Current page to list
    * @param   string   Header field to sort by
    * @param   string   Sort order [ASC|DESC]
+   * @param   boolean  Number of slice items to extract from result array
    * @return  array    Indexed array with message header objects
    * @access  public   
    */
-  function list_headers($mbox_name='', $page=NULL, $sort_field=NULL, $sort_order=NULL)
+  function list_headers($mbox_name='', $page=NULL, $sort_field=NULL, $sort_order=NULL, $slice=0)
     {
-    $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
-    return $this->_list_headers($mailbox, $page, $sort_field, $sort_order);
+    $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
+    return $this->_list_headers($mailbox, $page, $sort_field, $sort_order, false, $slice);
     }
 
 
@@ -553,14 +563,14 @@
    * @access  private
    * @see     rcube_imap::list_headers
    */
-  function _list_headers($mailbox='', $page=NULL, $sort_field=NULL, $sort_order=NULL, $recursive=FALSE)
+  private function _list_headers($mailbox='', $page=NULL, $sort_field=NULL, $sort_order=NULL, $recursive=FALSE, $slice=0)
     {
     if (!strlen($mailbox))
       return array();
 
     // use saved message set
     if ($this->search_string && $mailbox == $this->mailbox)
-      return $this->_list_header_set($mailbox, $page, $sort_field, $sort_order);
+      return $this->_list_header_set($mailbox, $page, $sort_field, $sort_order, $slice);
 
     $this->_set_sort_order($sort_field, $sort_order);
 
@@ -573,13 +583,16 @@
       {
       $start_msg = ($page-1) * $this->page_size;
       $a_msg_headers = $this->get_message_cache($cache_key, $start_msg, $start_msg+$this->page_size, $this->sort_field, $this->sort_order);
-      return array_values($a_msg_headers);
+      $result = array_values($a_msg_headers);
+      if ($slice)
+        $result = array_slice($result, -$slice, $slice);
+      return $result;
       }
     // cache is dirty, sync it
     else if ($this->caching_enabled && $cache_status==-1 && !$recursive)
       {
       $this->sync_header_index($mailbox);
-      return $this->_list_headers($mailbox, $page, $this->sort_field, $this->sort_order, TRUE);
+      return $this->_list_headers($mailbox, $page, $this->sort_field, $this->sort_order, TRUE, $slice);
       }
 
     // retrieve headers from IMAP
@@ -591,13 +604,16 @@
       $max = max($msg_index);
       $msg_index = array_slice($msg_index, $begin, $end-$begin);
 
+      if ($slice)
+        $msg_index = array_slice($msg_index, ($this->sort_order == 'DESC' ? 0 : -$slice), $slice);
+
       // fetch reqested headers from server
       $this->_fetch_headers($mailbox, join(',', $msg_index), $a_msg_headers, $cache_key);
       }
     else
       {
       $a_index = iil_C_FetchHeaderIndex($this->conn, $mailbox, "1:*", $this->sort_field, $this->skip_deleted);
-    
+
       if (empty($a_index))
         return array();
 
@@ -606,6 +622,9 @@
       $max = max($msg_index);
       list($begin, $end) = $this->_get_message_range(count($msg_index), $page);
       $msg_index = array_slice($msg_index, $begin, $end-$begin);
+
+      if ($slice)
+        $msg_index = array_slice($msg_index, ($this->sort_order == 'DESC' ? 0 : -$slice), $slice);
 
       // fetch reqested headers from server
       $this->_fetch_headers($mailbox, join(",", $msg_index), $a_msg_headers, $cache_key);
@@ -641,11 +660,12 @@
    * @param   int      Current page to list
    * @param   string   Header field to sort by
    * @param   string   Sort order [ASC|DESC]
+   * @param   boolean  Number of slice items to extract from result array
    * @return  array    Indexed array with message header objects
    * @access  private
    * @see     rcube_imap::list_header_set()
    */
-  function _list_header_set($mailbox, $page=NULL, $sort_field=NULL, $sort_order=NULL)
+  private function _list_header_set($mailbox, $page=NULL, $sort_field=NULL, $sort_order=NULL, $slice=0)
     {
     if (!strlen($mailbox) || empty($this->search_set))
       return array();
@@ -676,6 +696,9 @@
       // get messages uids for one page
       $msgs = array_slice(array_values($msgs), $start_msg, min(count($msgs)-$start_msg, $this->page_size));
 
+      if ($slice)
+        $msgs = array_slice($msgs, -$slice, $slice);
+
       // fetch headers
       $this->_fetch_headers($mailbox, join(',',$msgs), $a_msg_headers, NULL);
 
@@ -692,6 +715,8 @@
 	$a_index = $this->message_index('', $this->sort_field, $this->sort_order);
         // get messages uids for one page...
         $msgs = array_slice($a_index, $start_msg, min($cnt-$start_msg, $this->page_size));
+        if ($slice)
+          $msgs = array_slice($msgs, -$slice, $slice);
 	// ...and fetch headers
         $this->_fetch_headers($mailbox, join(',', $msgs), $a_msg_headers, NULL);
 
@@ -717,7 +742,11 @@
         $a_msg_headers = iil_SortHeaders($a_msg_headers, $this->sort_field, $this->sort_order);
       
         // only return the requested part of the set
-        return array_slice(array_values($a_msg_headers), $start_msg, min($cnt-$start_msg, $this->page_size));
+	$a_msg_headers = array_slice(array_values($a_msg_headers), $start_msg, min($cnt-$start_msg, $this->page_size));
+        if ($slice)
+          $a_msg_headers = array_slice($a_msg_headers, -$slice, $slice);
+
+        return $a_msg_headers;
         }
       }
     }
@@ -731,7 +760,7 @@
    * @return array   array with two values: first index, last index
    * @access private
    */
-  function _get_message_range($max, $page)
+  private function _get_message_range($max, $page)
     {
     $start_msg = ($page-1) * $this->page_size;
     
@@ -770,7 +799,7 @@
    * @return int     Messages count
    * @access private
    */
-  function _fetch_headers($mailbox, $msgs, &$a_msg_headers, $cache_key)
+  private function _fetch_headers($mailbox, $msgs, &$a_msg_headers, $cache_key)
     {
     // fetch reqested headers from server
     $a_header_index = iil_C_FetchHeaders($this->conn, $mailbox, $msgs, false, false, $this->fetch_add_headers);
@@ -779,23 +808,18 @@
       {
       // cache is incomplete
       $cache_index = $this->get_message_cache_index($cache_key);
-    
-      foreach ($a_header_index as $i => $headers)
-        { 
-/*
-        if ($headers->deleted && $this->skip_deleted)
-          {
-          // delete from cache
-          if ($cache_index[$headers->id] && $cache_index[$headers->id] == $headers->uid)
-            $this->remove_message_cache($cache_key, $headers->uid);
 
-          continue;
-          }
-*/
-        // add message to cache
-        if ($this->caching_enabled && $cache_index[$headers->id] != $headers->uid)
-          $this->add_message_cache($cache_key, $headers->id, $headers, NULL,
-		!in_array((string)$headers->uid, $cache_index, true));
+      foreach ($a_header_index as $i => $headers) {
+        if ($this->caching_enabled && $cache_index[$headers->id] != $headers->uid) {
+	  // prevent index duplicates
+	  if ($cache_index[$headers->id]) {
+	    $this->remove_message_cache($cache_key, $headers->id, true);
+	    unset($cache_index[$headers->id]);
+	    }
+          // add message to cache
+	  $this->add_message_cache($cache_key, $headers->id, $headers, NULL,
+	    !in_array($headers->uid, $cache_index));
+	  }
 
         $a_msg_headers[$headers->uid] = $headers;
         }
@@ -817,7 +841,7 @@
     {
     $this->_set_sort_order($sort_field, $sort_order);
 
-    $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+    $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
     $key = "{$mailbox}:{$this->sort_field}:{$this->sort_order}:{$this->search_string}.msgi";
 
     // we have a saved search result. get index from there
@@ -938,7 +962,7 @@
       if ($headers = iil_C_FetchHeader($this->conn, $mailbox, join(',', $for_update), false, $this->fetch_add_headers))
         foreach ($headers as $header)
           $this->add_message_cache($cache_key, $header->id, $header, NULL,
-		in_array((string)$header->uid, (array)$for_remove, true));
+		in_array($header->uid, (array)$for_remove));
       }
     }
 
@@ -958,7 +982,7 @@
     if (!$str)
       return false;
     
-    $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+    $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
 
     $results = $this->_search_index($mailbox, $str, $charset, $sort_field);
 
@@ -1001,7 +1025,7 @@
    * @access private
    * @see rcube_imap::search()
    */
-  function _search_index($mailbox, $criteria='ALL', $charset=NULL, $sort_field=NULL)
+  private function _search_index($mailbox, $criteria='ALL', $charset=NULL, $sort_field=NULL)
     {
     $orig_criteria = $criteria;
 
@@ -1015,14 +1039,6 @@
       }
     else
       $a_messages = iil_C_Search($this->conn, $mailbox, ($charset ? "CHARSET $charset " : '') . $criteria);
-
-    // clean message list (there might be some empty entries)
-    if (is_array($a_messages))
-      {
-      foreach ($a_messages as $i => $val)
-        if (empty($val))
-          unset($a_messages[$i]);
-      }
     
     // update messagecount cache ?
 //    $a_mailbox_cache = get_cache('messagecount');
@@ -1072,7 +1088,7 @@
    */
   function get_headers($id, $mbox_name=NULL, $is_uid=TRUE, $bodystr=FALSE)
     {
-    $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+    $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
     $uid = $is_uid ? $id : $this->_id2uid($id);
 
     // get cached headers
@@ -1112,21 +1128,16 @@
       return $headers->structure;
     }
 
-    // resolve message sequence number
-    if (!($msg_id = $this->_uid2id($uid))) {
-      return FALSE;
-    }
-
     if (!$structure_str)
-      $structure_str = iil_C_FetchStructureString($this->conn, $this->mailbox, $msg_id);
+      $structure_str = iil_C_FetchStructureString($this->conn, $this->mailbox, $uid, true);
     $structure = iml_GetRawStructureArray($structure_str);
     $struct = false;
 
     // parse structure and add headers
     if (!empty($structure))
       {
-      $this->_msg_id = $msg_id;
       $headers = $this->get_headers($uid);
+      $this->_msg_id = $headers->id;
 
       // set message charset from message headers
       if ($headers->charset)
@@ -1147,7 +1158,7 @@
 
       // write structure to cache
       if ($this->caching_enabled)
-        $this->add_message_cache($cache_key, $msg_id, $headers, $struct);
+        $this->add_message_cache($cache_key, $this->_msg_id, $headers, $struct);
       }
 
     return $struct;
@@ -1264,7 +1275,7 @@
     // fetch message headers if message/rfc822 or named part (could contain Content-Location header)
     if ($struct->ctype_primary == 'message' || ($struct->ctype_parameters['name'] && !$struct->content_id)) {
       if (empty($raw_headers))
-        $raw_headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, $struct->mime_id);
+        $raw_headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, false, $struct->mime_id);
       $struct->headers = $this->_parse_headers($raw_headers) + $struct->headers;
     }
 
@@ -1287,7 +1298,7 @@
    * @param  object rcube_message_part Part object
    * @param  string Part's raw headers
    */
-  function _set_part_filename(&$part, $headers=null)
+  private function _set_part_filename(&$part, $headers=null)
     {
     if (!empty($part->d_parameters['filename']))
       $filename_mime = $part->d_parameters['filename'];
@@ -1307,7 +1318,7 @@
       // we must fetch and parse headers "manually"
       if ($i<2) {
 	if (!$headers)
-          $headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, $part->mime_id);
+          $headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, false, $part->mime_id);
         $filename_mime = '';
         $i = 0;
         while (preg_match('/filename\*'.$i.'\s*=\s*"*([^"\n;]+)[";]*/', $headers, $matches)) {
@@ -1324,7 +1335,7 @@
       }
       if ($i<2) {
 	if (!$headers)
-          $headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, $part->mime_id);
+          $headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, false, $part->mime_id);
         $filename_encoded = '';
         $i = 0; $matches = array();
         while (preg_match('/filename\*'.$i.'\*\s*=\s*"*([^"\n;]+)[";]*/', $headers, $matches)) {
@@ -1341,7 +1352,7 @@
       }
       if ($i<2) {
 	if (!$headers)
-          $headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, $part->mime_id);
+          $headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, false, $part->mime_id);
         $filename_mime = '';
         $i = 0; $matches = array();
         while (preg_match('/\s+name\*'.$i.'\s*=\s*"*([^"\n;]+)[";]*/', $headers, $matches)) {
@@ -1358,7 +1369,7 @@
       }
       if ($i<2) {
 	if (!$headers)
-          $headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, $part->mime_id);
+          $headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $this->_msg_id, false, $part->mime_id);
         $filename_encoded = '';
         $i = 0; $matches = array();
         while (preg_match('/\s+name\*'.$i.'\*\s*=\s*"*([^"\n;]+)[";]*/', $headers, $matches)) {
@@ -1422,14 +1433,15 @@
    */
   function &get_message_part($uid, $part=1, $o_part=NULL, $print=NULL, $fp=NULL)
     {
-    if (!($msg_id = $this->_uid2id($uid)))
-      return FALSE;
-    
     // get part encoding if not provided
     if (!is_object($o_part))
       {
-      $structure_str = iil_C_FetchStructureString($this->conn, $this->mailbox, $msg_id); 
+      $structure_str = iil_C_FetchStructureString($this->conn, $this->mailbox, $uid, true); 
       $structure = iml_GetRawStructureArray($structure_str);
+      // error or message not found
+      if (empty($structure))
+        return false;
+
       $part_type = iml_GetPartTypeCode($structure, $part);
       $o_part = new rcube_message_part;
       $o_part->ctype_primary = $part_type==0 ? 'text' : ($part_type==2 ? 'message' : 'other');
@@ -1441,9 +1453,9 @@
 
     if (!$part) $part = 'TEXT';
 
-    $body = iil_C_HandlePartBody($this->conn, $this->mailbox, $msg_id, $part,
+    $body = iil_C_HandlePartBody($this->conn, $this->mailbox, $uid, true, $part,
         $o_part->encoding, $print, $fp);
-      
+
     if ($fp || $print)
       return true;
 
@@ -1483,10 +1495,7 @@
    */
   function &get_raw_body($uid)
     {
-    if (!($msg_id = $this->_uid2id($uid)))
-      return FALSE;
-
-    return iil_C_HandlePartBody($this->conn, $this->mailbox, $msg_id);
+    return iil_C_HandlePartBody($this->conn, $this->mailbox, $uid, true);
     }
 
 
@@ -1498,12 +1507,7 @@
    */
   function &get_raw_headers($uid)
     {
-    if (!($msg_id = $this->_uid2id($uid)))
-      return FALSE;
-
-    $headers = iil_C_FetchPartHeader($this->conn, $this->mailbox, $msg_id, NULL);
-
-    return $headers;    
+    return iil_C_FetchPartHeader($this->conn, $this->mailbox, $uid, true);
     }
     
 
@@ -1514,10 +1518,7 @@
    */ 
   function print_raw_body($uid)
     {
-    if (!($msg_id = $this->_uid2id($uid)))
-      return FALSE;
-
-    iil_C_HandlePartBody($this->conn, $this->mailbox, $msg_id, NULL, NULL, true);
+    iil_C_HandlePartBody($this->conn, $this->mailbox, $uid, true, NULL, NULL, true);
     }
 
 
@@ -1527,34 +1528,26 @@
    * @param mixed  Message UIDs as array or as comma-separated string
    * @param string Flag to set: SEEN, UNDELETED, DELETED, RECENT, ANSWERED, DRAFT, MDNSENT
    * @param string Folder name
+   * @param boolean True to skip message cache clean up
    * @return boolean True on success, False on failure
    */
-  function set_flag($uids, $flag, $mbox_name=NULL)
+  function set_flag($uids, $flag, $mbox_name=NULL, $skip_cache=false)
     {
-    $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+    $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
 
     $flag = strtoupper($flag);
     if (!is_array($uids))
       $uids = explode(',',$uids);
       
-    if ($flag=='UNDELETED')
-      $result = iil_C_Undelete($this->conn, $mailbox, join(',', $uids));
-    else if ($flag=='UNSEEN')
-      $result = iil_C_Unseen($this->conn, $mailbox, join(',', $uids));
-    else if ($flag=='UNFLAGGED')
-      $result = iil_C_UnFlag($this->conn, $mailbox, join(',', $uids), 'FLAGGED');
+    if (strpos($flag, 'UN') === 0)
+      $result = iil_C_UnFlag($this->conn, $mailbox, join(',', $uids), substr($flag, 2));
     else
       $result = iil_C_Flag($this->conn, $mailbox, join(',', $uids), $flag);
 
     // reload message headers if cached
-    if ($this->caching_enabled)
-      {
+    if ($this->caching_enabled && !$skip_cache) {
       $cache_key = $mailbox.'.msg';
       $this->remove_message_cache($cache_key, $uids);
-
-      // close and re-open connection
-      // this prevents connection problems with Courier 
-      $this->reconnect();
       }
 
     // set nr of messages that were flaged
@@ -1573,6 +1566,21 @@
 
 
   /**
+   * Remove message flag for one or several messages
+   *
+   * @param mixed  Message UIDs as array or as comma-separated string
+   * @param string Flag to unset: SEEN, DELETED, RECENT, ANSWERED, DRAFT, MDNSENT
+   * @param string Folder name
+   * @return boolean True on success, False on failure
+   * @see set_flag
+   */
+  function unset_flag($uids, $flag, $mbox_name=NULL)
+    {
+    return $this->set_flag($uids, 'UN'.$flag, $mbox_name);
+    }
+
+
+  /**
    * Append a mail message (source) to a specific mailbox
    *
    * @param string Target mailbox
@@ -1581,7 +1589,7 @@
    */
   function save_message($mbox_name, &$message)
     {
-    $mailbox = $this->_mod_mailbox($mbox_name);
+    $mailbox = $this->mod_mailbox($mbox_name);
 
     // make sure mailbox exists
     if (($mailbox == 'INBOX') || in_array($mailbox, $this->_list_mailboxes()))
@@ -1607,8 +1615,10 @@
    */
   function move_message($uids, $to_mbox, $from_mbox='')
     {
-    $to_mbox = $this->_mod_mailbox($to_mbox);
-    $from_mbox = $from_mbox ? $this->_mod_mailbox($from_mbox) : $this->mailbox;
+    $fbox = $from_mbox;
+    $tbox = $to_mbox;
+    $to_mbox = $this->mod_mailbox($to_mbox);
+    $from_mbox = $from_mbox ? $this->mod_mailbox($from_mbox) : $this->mailbox;
 
     // make sure mailbox exists
     if ($to_mbox != 'INBOX' && !in_array($to_mbox, $this->_list_mailboxes()))
@@ -1621,11 +1631,19 @@
 
     // convert the list of uids to array
     $a_uids = is_string($uids) ? explode(',', $uids) : (is_array($uids) ? $uids : NULL);
-    
+
     // exit if no message uids are specified
     if (!is_array($a_uids) || empty($a_uids))
       return false;
 
+    // flag messages as read before moving them
+    $config = rcmail::get_instance()->config;
+    if ($config->get('read_when_deleted') && $tbox == $config->get('trash_mbox')) {
+      // don't flush cache (4th argument)
+      $this->set_flag($uids, 'SEEN', $fbox, true);
+      }
+
+    // move messages
     $iil_move = iil_C_Move($this->conn, join(',', $a_uids), $from_mbox, $to_mbox);
     $moved = !($iil_move === false || $iil_move < 0);
     
@@ -1640,13 +1658,14 @@
     else if (rcmail::get_instance()->config->get('delete_always', false)) {
       return iil_C_Delete($this->conn, $from_mbox, join(',', $a_uids));
     }
-      
+
     // remove message ids from search set
     if ($moved && $this->search_set && $from_mbox == $this->mailbox) {
       foreach ($a_uids as $uid)
         $a_mids[] = $this->_uid2id($uid, $from_mbox);
       $this->search_set = array_diff($this->search_set, $a_mids);
     }
+
     // update cached message headers
     $cache_key = $from_mbox.'.msg';
     if ($moved && $start_index = $this->get_message_cache_index_min($cache_key, $a_uids)) {
@@ -1667,7 +1686,7 @@
    */
   function delete_message($uids, $mbox_name='')
     {
-    $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+    $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
 
     // convert the list of uids to array
     $a_uids = is_string($uids) ? explode(',', $uids) : (is_array($uids) ? $uids : NULL);
@@ -1677,7 +1696,7 @@
       return false;
 
     $deleted = iil_C_Delete($this->conn, $mailbox, join(',', $a_uids));
-    
+
     // send expunge command in order to have the deleted message
     // really deleted from the mailbox
     if ($deleted)
@@ -1693,7 +1712,7 @@
         $a_mids[] = $this->_uid2id($uid, $mailbox);
       $this->search_set = array_diff($this->search_set, $a_mids);
     }
-    
+
     // remove deleted messages from cache
     $cache_key = $mailbox.'.msg';
     if ($deleted && $start_index = $this->get_message_cache_index_min($cache_key, $a_uids)) {
@@ -1713,7 +1732,7 @@
    */
   function clear_mailbox($mbox_name=NULL)
     {
-    $mailbox = !empty($mbox_name) ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+    $mailbox = !empty($mbox_name) ? $this->mod_mailbox($mbox_name) : $this->mailbox;
     $msg_count = $this->_messagecount($mailbox, 'ALL');
     
     if ($msg_count>0)
@@ -1745,7 +1764,7 @@
    */
   function expunge($mbox_name='', $clear_cache=TRUE)
     {
-    $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+    $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
     return $this->_expunge($mailbox, $clear_cache);
     }
 
@@ -1760,7 +1779,7 @@
    * @return boolean True on success
    * @access private
    */
-  function _expunge($mailbox, $clear_cache=TRUE, $uids=NULL)
+  private function _expunge($mailbox, $clear_cache=TRUE, $uids=NULL)
     {
     if ($uids && $this->get_capability('UIDPLUS')) 
       $a_uids = is_array($uids) ? join(',', $uids) : $uids;
@@ -1798,12 +1817,12 @@
       return $sa_unsubscribed;
       
     // retrieve list of folders from IMAP server
-    $a_mboxes = iil_C_ListMailboxes($this->conn, $this->_mod_mailbox($root), '*');
+    $a_mboxes = iil_C_ListMailboxes($this->conn, $this->mod_mailbox($root), '*');
 
     // modify names with root dir
     foreach ($a_mboxes as $mbox_name)
       {
-      $name = $this->_mod_mailbox($mbox_name, 'out');
+      $name = $this->mod_mailbox($mbox_name, 'out');
       if (strlen($name))
         $a_folders[] = $name;
       }
@@ -1875,7 +1894,7 @@
     // reduce mailbox name to 100 chars
     $name = substr($name, 0, 100);
 
-    $abs_name = $this->_mod_mailbox($name);
+    $abs_name = $this->mod_mailbox($name);
     $a_mailbox_cache = $this->get_cache('mailboxes');
 
     if (strlen($abs_name) && (!is_array($a_mailbox_cache) || !in_array($abs_name, $a_mailbox_cache)))
@@ -1904,8 +1923,8 @@
     $name = substr($new_name, 0, 100);
 
     // make absolute path
-    $mailbox = $this->_mod_mailbox($mbox_name);
-    $abs_name = $this->_mod_mailbox($name);
+    $mailbox = $this->mod_mailbox($mbox_name);
+    $abs_name = $this->mod_mailbox($name);
     
     // check if mailbox is subscribed
     $a_subscribed = $this->_list_mailboxes();
@@ -1958,12 +1977,12 @@
     else if (is_string($mbox_name) && strlen($mbox_name))
       $a_mboxes = explode(',', $mbox_name);
 
-    $all_mboxes = iil_C_ListMailboxes($this->conn, $this->_mod_mailbox($root), '*');
+    $all_mboxes = iil_C_ListMailboxes($this->conn, $this->mod_mailbox($root), '*');
 
     if (is_array($a_mboxes))
       foreach ($a_mboxes as $mbox_name)
         {
-        $mailbox = $this->_mod_mailbox($mbox_name);
+        $mailbox = $this->mod_mailbox($mbox_name);
 
         // unsubscribe mailbox before deleting
         iil_C_UnSubscribe($this->conn, $mailbox);
@@ -2004,13 +2023,13 @@
    */
   function create_default_folders()
     {
-    $a_folders = iil_C_ListMailboxes($this->conn, $this->_mod_mailbox(''), '*');
-    $a_subscribed = iil_C_ListSubscribed($this->conn, $this->_mod_mailbox(''), '*');
+    $a_folders = iil_C_ListMailboxes($this->conn, $this->mod_mailbox(''), '*');
+    $a_subscribed = iil_C_ListSubscribed($this->conn, $this->mod_mailbox(''), '*');
     
     // create default folders if they do not exist
     foreach ($this->default_folders as $folder)
       {
-      $abs_name = $this->_mod_mailbox($folder);
+      $abs_name = $this->mod_mailbox($folder);
       if (!in_array_nocase($abs_name, $a_folders))
         $this->create_mailbox($folder, TRUE);
       else if (!in_array_nocase($abs_name, $a_subscribed))
@@ -2102,7 +2121,7 @@
   /**
    * @access private
    */
-  function _read_cache_record($key)
+  private function _read_cache_record($key)
     {
     if ($this->db)
       {
@@ -2128,7 +2147,7 @@
   /**
    * @access private
    */
-  function _write_cache_record($key, $data)
+  private function _write_cache_record($key, $data)
     {
     if (!$this->db)
       return FALSE;
@@ -2178,7 +2197,7 @@
   /**
    * @access private
    */
-  function _clear_cache_record($key)
+  private function _clear_cache_record($key)
     {
     $this->db->query(
       "DELETE FROM ".get_table_name('cache')."
@@ -2211,8 +2230,10 @@
     $msg_count = $this->_messagecount($mailbox);
     $cache_count = count($cache_index);
 
-    // console("Cache check: $msg_count !== ".count($cache_index));
-
+    // empty mailbox
+    if (!$msg_count)
+      return $cache_count ? -2 : 1;
+    
     if ($cache_count==$msg_count) {
       if ($this->skip_deleted) {
 	$h_index = iil_C_FetchHeaderIndex($this->conn, $mailbox, "1:*", 'UID', $this->skip_deleted);
@@ -2368,8 +2389,7 @@
          FROM ".get_table_name('messages')."
          WHERE  user_id=?
          AND    cache_key=?
-         AND    uid=?
-         AND    del<>1",
+         AND    uid=?",
         $_SESSION['user_id'],
         $key,
         $headers->uid);
@@ -2400,10 +2420,10 @@
         $key,
         $index,
         $headers->uid,
-        (string)rc_substr($this->db->encode($this->decode_header($headers->subject, TRUE)), 0, 128),
-        (string)rc_substr($this->db->encode($this->decode_header($headers->from, TRUE)), 0, 128),
-        (string)rc_substr($this->db->encode($this->decode_header($headers->to, TRUE)), 0, 128),
-        (string)rc_substr($this->db->encode($this->decode_header($headers->cc, TRUE)), 0, 128),
+        (string)mb_substr($this->db->encode($this->decode_header($headers->subject, TRUE)), 0, 128),
+        (string)mb_substr($this->db->encode($this->decode_header($headers->from, TRUE)), 0, 128),
+        (string)mb_substr($this->db->encode($this->decode_header($headers->to, TRUE)), 0, 128),
+        (string)mb_substr($this->db->encode($this->decode_header($headers->cc, TRUE)), 0, 128),
         (int)$headers->size,
         serialize($this->db->encode(clone $headers)),
         is_object($struct) ? serialize($this->db->encode(clone $struct)) : NULL
@@ -2414,16 +2434,16 @@
   /**
    * @access private
    */
-  private function remove_message_cache($key, $uids)
+  private function remove_message_cache($key, $ids, $idx=false)
     {
     if (!$this->caching_enabled)
       return;
     
     $this->db->query(
       "DELETE FROM ".get_table_name('messages')."
-      WHERE  user_id=?
-      AND    cache_key=?
-      AND    uid IN (".$this->db->array2list($uids, 'integer').")",
+      WHERE user_id=?
+      AND cache_key=?
+      AND ".($idx ? "idx" : "uid")." IN (".$this->db->array2list($ids, 'integer').")",
       $_SESSION['user_id'],
       $key);
     }
@@ -2438,12 +2458,10 @@
     
     $this->db->query(
       "DELETE FROM ".get_table_name('messages')."
-       WHERE  user_id=?
-       AND    cache_key=?
-       AND    idx>=?",
-      $_SESSION['user_id'],
-      $key,
-      $start_index);
+       WHERE user_id=?
+       AND cache_key=?
+       AND idx>=?",
+      $_SESSION['user_id'], $key, $start_index);
     }
 
   /**
@@ -2631,7 +2649,7 @@
    *
    * @access private
    */
-  function _decode_mime_string_part($str)
+  private function _decode_mime_string_part($str)
     {
     $a = explode('?', $str);
     $count = count($a);
@@ -2663,7 +2681,6 @@
    * @param string Input string
    * @param string Part encoding
    * @return string Decoded string
-   * @access private
    */
   function mime_decode($input, $encoding='7bit')
     {
@@ -2717,7 +2734,7 @@
    */
   function get_id($uid, $mbox_name=NULL) 
     {
-      $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+      $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
       return $this->_uid2id($uid, $mailbox);
     }
 
@@ -2731,21 +2748,19 @@
    */
   function get_uid($id,$mbox_name=NULL)
     {
-      $mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
+      $mailbox = $mbox_name ? $this->mod_mailbox($mbox_name) : $this->mailbox;
       return $this->_id2uid($id, $mailbox);
     }
 
 
-
-  /* --------------------------------
-   *         private methods
-   * --------------------------------*/
-
-
   /**
-   * @access private
+   * Modify folder name for input/output according to root dir and namespace
+   *
+   * @param string  Folder name
+   * @param string  Mode
+   * @return string Folder name
    */
-  function _mod_mailbox($mbox_name, $mode='in')
+  function mod_mailbox($mbox_name, $mode='in')
     {
     if ((!empty($this->root_ns) && $this->root_ns == $mbox_name) || $mbox_name == 'INBOX')
       return $mbox_name;
@@ -2758,11 +2773,16 @@
     return $mbox_name;
     }
 
+
+  /* --------------------------------
+   *         private methods
+   * --------------------------------*/
+
   /**
    * Validate the given input and save to local properties
    * @access private
    */
-  function _set_sort_order($sort_field, $sort_order)
+  private function _set_sort_order($sort_field, $sort_order)
   {
     if ($sort_field != null)
       $this->sort_field = asciiwords($sort_field);
@@ -2774,7 +2794,7 @@
    * Sort mailboxes first by default folders and then in alphabethical order
    * @access private
    */
-  function _sort_mailbox_list($a_folders)
+  private function _sort_mailbox_list($a_folders)
     {
     $a_out = $a_defaults = $folders = array();
 
@@ -2789,7 +2809,7 @@
       if (($p = array_search(strtolower($folder), $this->default_folders_lc)) !== false && !$a_defaults[$p])
         $a_defaults[$p] = $folder;
       else
-        $folders[$folder] = rc_strtolower(rcube_charset_convert($folder, 'UTF7-IMAP'));
+        $folders[$folder] = mb_strtolower(rcube_charset_convert($folder, 'UTF7-IMAP'));
       }
 
     // sort folders and place defaults on the top
@@ -2815,7 +2835,7 @@
   /**
    * @access private
    */
-  function _rsort($folder, $delimiter, &$list, &$out)
+  private function _rsort($folder, $delimiter, &$list, &$out)
     {
       while (list($key, $name) = each($list)) {
 	if (strpos($name, $folder.$delimiter) === 0) {
@@ -2832,7 +2852,7 @@
   /**
    * @access private
    */
-  function _uid2id($uid, $mbox_name=NULL)
+  private function _uid2id($uid, $mbox_name=NULL)
     {
     if (!$mbox_name)
       $mbox_name = $this->mailbox;
@@ -2846,7 +2866,7 @@
   /**
    * @access private
    */
-  function _id2uid($id, $mbox_name=NULL)
+  private function _id2uid($id, $mbox_name=NULL)
     {
     if (!$mbox_name)
       $mbox_name = $this->mailbox;
@@ -2868,26 +2888,23 @@
    * Subscribe/unsubscribe a list of mailboxes and update local cache
    * @access private
    */
-  function _change_subscription($a_mboxes, $mode)
+  private function _change_subscription($a_mboxes, $mode)
     {
     $updated = FALSE;
-    
+
     if (is_array($a_mboxes))
       foreach ($a_mboxes as $i => $mbox_name)
         {
-        $mailbox = $this->_mod_mailbox($mbox_name);
+        $mailbox = $this->mod_mailbox($mbox_name);
         $a_mboxes[$i] = $mailbox;
 
         if ($mode=='subscribe')
-          $result = iil_C_Subscribe($this->conn, $mailbox);
+          $updated = iil_C_Subscribe($this->conn, $mailbox);
         else if ($mode=='unsubscribe')
-          $result = iil_C_UnSubscribe($this->conn, $mailbox);
-
-        if ($result>=0)
-          $updated = TRUE;
+          $updated = iil_C_UnSubscribe($this->conn, $mailbox);
         }
-        
-    // get cached mailbox list    
+
+    // get cached mailbox list
     if ($updated)
       {
       $a_mailbox_cache = $this->get_cache('mailboxes');
@@ -2899,7 +2916,7 @@
         $a_mailbox_cache = array_merge($a_mailbox_cache, $a_mboxes);
       else if ($mode=='unsubscribe')
         $a_mailbox_cache = array_diff($a_mailbox_cache, $a_mboxes);
-        
+
       // write mailboxlist to cache
       $this->update_cache('mailboxes', $this->_sort_mailbox_list($a_mailbox_cache));
       }
@@ -2912,7 +2929,7 @@
    * Increde/decrese messagecount for a specific mailbox
    * @access private
    */
-  function _set_messagecount($mbox_name, $mode, $increment)
+  private function _set_messagecount($mbox_name, $mode, $increment)
     {
     $a_mailbox_cache = FALSE;
     $mailbox = $mbox_name ? $mbox_name : $this->mailbox;
@@ -2941,7 +2958,7 @@
    * Remove messagecount of a specific mailbox from cache
    * @access private
    */
-  function _clear_messagecount($mbox_name='')
+  private function _clear_messagecount($mbox_name='')
     {
     $a_mailbox_cache = FALSE;
     $mailbox = $mbox_name ? $mbox_name : $this->mailbox;
@@ -2960,7 +2977,7 @@
    * Split RFC822 header string into an associative array
    * @access private
    */
-  function _parse_headers($headers)
+  private function _parse_headers($headers)
     {
     $a_headers = array();
     $lines = explode("\n", $headers);
@@ -2983,7 +3000,7 @@
   /**
    * @access private
    */
-  function _parse_address_list($str, $decode=true)
+  private function _parse_address_list($str, $decode=true)
     {
     // remove any newlines and carriage returns before
     $a = rcube_explode_quoted_string('[,;]', preg_replace( "/[\r\n]/", " ", $str));

--
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