From 6204390af16bcf50f82da61a1aefc2ad0c0adf94 Mon Sep 17 00:00:00 2001
From: thomascube <thomas@roundcube.net>
Date: Mon, 01 May 2006 10:47:27 -0400
Subject: [PATCH] Applied patch for requesting receipts by Salvatore Ansani

---
 program/include/rcube_imap.inc |  661 +++++++++++++++++++++++++++++++++++++++++++++---------
 1 files changed, 547 insertions(+), 114 deletions(-)

diff --git a/program/include/rcube_imap.inc b/program/include/rcube_imap.inc
index ed7c3ed..c818fa0 100644
--- a/program/include/rcube_imap.inc
+++ b/program/include/rcube_imap.inc
@@ -21,11 +21,24 @@
 */
 
 
+/**
+ * Obtain classes from the Iloha IMAP library
+ */
 require_once('lib/imap.inc');
 require_once('lib/mime.inc');
 require_once('lib/utf7.inc');
 
 
+/**
+ * Interface class for accessing an IMAP server
+ *
+ * This is a wrapper that implements the Iloha IMAP Library (IIL)
+ *
+ * @package    RoundCube Webmail
+ * @author     Thomas Bruederli <roundcube@gmail.com>
+ * @version    1.22
+ * @link       http://ilohamail.org
+ */
 class rcube_imap
   {
   var $db;
@@ -35,6 +48,8 @@
   var $mailbox = 'INBOX';
   var $list_page = 1;
   var $page_size = 10;
+  var $sort_field = 'date';
+  var $sort_order = 'DESC';
   var $delimiter = NULL;
   var $caching_enabled = FALSE;
   var $default_folders = array('inbox', 'drafts', 'sent', 'junk', 'trash');
@@ -44,38 +59,60 @@
   var $uid_id_map = array();
   var $msg_headers = array();
   var $capabilities = array();
+  var $skip_deleted = FALSE;
+  var $debug_level = 1;
 
 
-  // PHP 5 constructor
+  /**
+   * Object constructor
+   *
+   * @param  object  Database connection
+   */
   function __construct($db_conn)
     {
-    $this->db = $db_conn;    
+    $this->db = $db_conn;
     }
 
-  // PHP 4 compatibility
+
+  /**
+   * PHP 4 object constructor
+   *
+   * @see  rcube_imap::__construct
+   */
   function rcube_imap($db_conn)
     {
     $this->__construct($db_conn);
     }
 
 
+  /**
+   * Connect to an IMAP server
+   *
+   * @param  string   Host to connect
+   * @param  string   Username for IMAP account
+   * @param  string   Password for IMAP account
+   * @param  number   Port to connect to
+   * @param  boolean  Use SSL connection
+   * @return boolean  TRUE on success, FALSE on failure
+   * @access public
+   */
   function connect($host, $user, $pass, $port=143, $use_ssl=FALSE)
     {
-    global $ICL_SSL, $ICL_PORT, $CONFIG;
+    global $ICL_SSL, $ICL_PORT, $IMAP_USE_INTERNAL_DATE;
     
     // check for Open-SSL support in PHP build
     if ($use_ssl && in_array('openssl', get_loaded_extensions()))
       $ICL_SSL = TRUE;
     else if ($use_ssl)
       {
-      raise_error(array('code' => 403,
-                        'type' => 'imap',
-                        'file' => __FILE__,
+      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;
+    
     $this->conn = iil_Connect($host, $user, $pass, array('imap' => 'check'));
     $this->host = $host;
     $this->user = $user;
@@ -84,7 +121,7 @@
     $this->ssl = $use_ssl;
     
     // print trace mesages
-    if ($this->conn && ($CONFIG['debug_level'] & 8))
+    if ($this->conn && ($this->debug_level & 8))
       console($this->conn->message);
     
     // write error log
@@ -114,6 +151,12 @@
     }
 
 
+  /**
+   * Close IMAP connection
+   * Usually done on script shutdown
+   *
+   * @access public
+   */
   function close()
     {    
     if ($this->conn)
@@ -121,6 +164,12 @@
     }
 
 
+  /**
+   * Close IMAP connection and re-connect
+   * This is used to avoid some strange socket errors when talking to Courier IMAP
+   *
+   * @access public
+   */
   function reconnect()
     {
     $this->close();
@@ -128,6 +177,15 @@
     }
 
 
+  /**
+   * Set a root folder for the IMAP connection.
+   *
+   * Only folders within this root folder will be displayed
+   * and all folder paths will be translated using this folder name
+   *
+   * @param  string   Root folder
+   * @access public
+   */
   function set_rootdir($root)
     {
     if (ereg('[\.\/]$', $root)) //(substr($root, -1, 1)==='/')
@@ -140,6 +198,12 @@
     }
 
 
+  /**
+   * This list of folders will be listed above all other folders
+   *
+   * @param  array  Indexed list of folder names
+   * @access public
+   */
   function set_default_mailboxes($arr)
     {
     if (is_array($arr))
@@ -157,6 +221,14 @@
     }
 
 
+  /**
+   * Set internal mailbox reference.
+   *
+   * All operations will be perfomed on this mailbox/folder
+   *
+   * @param  string  Mailbox/Folder name
+   * @access public
+   */
   function set_mailbox($mbox)
     {
     $mailbox = $this->_mod_mailbox($mbox);
@@ -171,24 +243,49 @@
     }
 
 
+  /**
+   * Set internal list page
+   *
+   * @param  number  Page number to list
+   * @access public
+   */
   function set_page($page)
     {
     $this->list_page = (int)$page;
     }
 
 
+  /**
+   * Set internal page size
+   *
+   * @param  number  Number of messages to display on one page
+   * @access public
+   */
   function set_pagesize($size)
     {
     $this->page_size = (int)$size;
     }
 
 
+  /**
+   * Returns the currently used mailbox name
+   *
+   * @return  string Name of the mailbox/folder
+   * @access  public
+   */
   function get_mailbox_name()
     {
     return $this->conn ? $this->_mod_mailbox($this->mailbox, 'out') : '';
     }
 
 
+  /**
+   * Returns the IMAP server's capability
+   *
+   * @param   string  Capability name
+   * @return  mixed   Capability value or TRUE if supported, FALSE if not
+   * @access  public
+   */
   function get_capability($cap)
     {
     $cap = strtoupper($cap);
@@ -196,6 +293,12 @@
     }
 
 
+  /**
+   * Returns the delimiter that is used by the IMAP server for folder separation
+   *
+   * @return  string  Delimiter string
+   * @access  public
+   */
   function get_hierarchy_delimiter()
     {
     if ($this->conn && empty($this->delimiter))
@@ -207,8 +310,17 @@
     return $this->delimiter;
     }
 
-  // public method for mailbox listing
-  // convert mailbox name with root dir first
+
+  /**
+   * Public method for mailbox listing.
+   *
+   * Converts mailbox name with root dir first
+   *
+   * @param   string  Optional root folder
+   * @param   string  Optional filter for mailbox listing
+   * @return  array   List of mailboxes/folders
+   * @access  public
+   */
   function list_mailboxes($root='', $filter='*')
     {
     $a_out = array();
@@ -227,7 +339,14 @@
     return $a_out;
     }
 
-  // private method for mailbox listing
+
+  /**
+   * Private method for mailbox listing
+   *
+   * @return  array   List of mailboxes/folders
+   * @access  private
+   * @see     rcube_imap::list_mailboxes
+   */
   function _list_mailboxes($root='', $filter='*')
     {
     $a_defaults = $a_out = array();
@@ -259,39 +378,79 @@
     }
 
 
-  // get message count for a specific mailbox; acceptes modes are: ALL, UNSEEN
+  /**
+   * Get message count for a specific mailbox
+   *
+   * @param   string   Mailbox/folder name
+   * @param   string   Mode for count [ALL|UNSEEN|RECENT]
+   * @param   boolean  Force reading from server and update cache
+   * @return  number   Number of messages
+   * @access  public   
+   */
   function messagecount($mbox='', $mode='ALL', $force=FALSE)
     {
     $mailbox = $mbox ? $this->_mod_mailbox($mbox) : $this->mailbox;
     return $this->_messagecount($mailbox, $mode, $force);
     }
 
-  // private method for getting nr of mesages
+
+  /**
+   * Private method for getting nr of messages
+   *
+   * @access  private
+   * @see     rcube_imap::messagecount
+   */
   function _messagecount($mailbox='', $mode='ALL', $force=FALSE)
     {
     $a_mailbox_cache = FALSE;
     $mode = strtoupper($mode);
 
-    if (!$mailbox)
+    if (empty($mailbox))
       $mailbox = $this->mailbox;
 
     $a_mailbox_cache = $this->get_cache('messagecount');
     
     // return cached value
     if (!$force && is_array($a_mailbox_cache[$mailbox]) && isset($a_mailbox_cache[$mailbox][$mode]))
-      return $a_mailbox_cache[$mailbox][$mode];      
+      return $a_mailbox_cache[$mailbox][$mode];
 
-    // get message count and store in cache
-    if ($mode == 'UNSEEN')
-      $count = iil_C_CountUnseen($this->conn, $mailbox);
+    // RECENT count is fetched abit different      
+    if ($mode == 'RECENT')
+       $count = iil_C_CheckForRecent($this->conn, $mailbox);
+
+    // use SEARCH for message counting
+    else if ($this->skip_deleted)
+      {
+      $search_str = "ALL UNDELETED";
+
+      // get message count and store in cache
+      if ($mode == 'UNSEEN')
+        $search_str .= " UNSEEN";
+
+      // get message count using SEARCH
+      // not very performant but more precise (using UNDELETED)
+      $count = 0;
+      $index = $this->_search_index($mailbox, $search_str);
+      if (is_array($index))
+        {
+        $str = implode(",", $index);
+        if (!empty($str))
+          $count = count($index);
+        }
+      }
     else
-      $count = iil_C_CountMessages($this->conn, $mailbox);
+      {
+      if ($mode == 'UNSEEN')
+        $count = iil_C_CountUnseen($this->conn, $mailbox);
+      else
+        $count = iil_C_CountMessages($this->conn, $mailbox);
+      }
 
-    if (is_array($a_mailbox_cache[$mailbox]))
+    if (!is_array($a_mailbox_cache[$mailbox]))
       $a_mailbox_cache[$mailbox] = array();
       
     $a_mailbox_cache[$mailbox][$mode] = (int)$count;
-    
+
     // write back to cache
     $this->update_cache('messagecount', $a_mailbox_cache);
 
@@ -299,30 +458,52 @@
     }
 
 
-  // public method for listing headers
-  // convert mailbox name with root dir first
-  function list_headers($mbox='', $page=NULL, $sort_field='date', $sort_order='DESC')
+  /**
+   * Public method for listing headers
+   * convert mailbox name with root dir first
+   *
+   * @param   string   Mailbox/folder name
+   * @param   number   Current page to list
+   * @param   string   Header field to sort by
+   * @param   string   Sort order [ASC|DESC]
+   * @return  array    Indexed array with message header objects
+   * @access  public   
+   */
+  function list_headers($mbox='', $page=NULL, $sort_field=NULL, $sort_order=NULL)
     {
     $mailbox = $mbox ? $this->_mod_mailbox($mbox) : $this->mailbox;
     return $this->_list_headers($mailbox, $page, $sort_field, $sort_order);
     }
 
 
-  // private method for listing message header
-  function _list_headers($mailbox='', $page=NULL, $sort_field='date', $sort_order='DESC')
+  /**
+   * Private method for listing message headers
+   *
+   * @access  private
+   * @see     rcube_imap::list_headers
+   */
+  function _list_headers($mailbox='', $page=NULL, $sort_field=NULL, $sort_order=NULL, $recursive=FALSE)
     {
     if (!strlen($mailbox))
       return array();
+      
+    if ($sort_field!=NULL)
+      $this->sort_field = $sort_field;
+    if ($sort_order!=NULL)
+      $this->sort_order = strtoupper($sort_order);
 
     $max = $this->_messagecount($mailbox);
     $start_msg = ($this->list_page-1) * $this->page_size;
     
+    list($begin, $end) = $this->_get_message_range($max, $page);
+    
+    /*    
     if ($page=='all')
       {
       $begin = 0;
       $end = $max;
       }
-    else if ($sort_order=='DESC')
+    else if (!$this->get_capability('sort') && $this->sort_order=='DESC')
       {
       $begin = $max - $this->page_size - $start_msg;
       $end =   $max - $start_msg;
@@ -330,13 +511,14 @@
     else
       {
       $begin = $start_msg;
-      $end =   $start_msg + $this->page_size;
+      $end   = $start_msg + $this->page_size;
       }
 
     if ($begin < 0) $begin = 0;
     if ($end < 0) $end = $max;
     if ($end > $max) $end = $max;
-
+	*/
+	
 //console("fetch headers $start_msg to ".($start_msg+$this->page_size)." (msg $begin to $end)");
 
     $headers_sorted = FALSE;
@@ -348,24 +530,19 @@
     // cache is OK, we can get all messages from local cache
     if ($cache_status>0)
       {
-      $a_msg_headers = $this->get_message_cache($cache_key, $start_msg, $start_msg+$this->page_size, $sort_field, $sort_order);
+      $a_msg_headers = $this->get_message_cache($cache_key, $start_msg, $start_msg+$this->page_size, $this->sort_field, $this->sort_order);
       $headers_sorted = TRUE;
       }
     else
       {
       // retrieve headers from IMAP
-      if ($this->get_capability('sort') && ($msg_index = iil_C_Sort($this->conn, $mailbox, $sort_field)))
+      if ($this->get_capability('sort') && ($msg_index = iil_C_Sort($this->conn, $mailbox, $this->sort_field, $this->skip_deleted ? 'UNDELETED' : '')))
         {
-//console("$mailbox: ".count($msg_index));
+//console("$mailbox: ".join(',', $msg_index));
         
         $msgs = $msg_index[$begin];
-        for ($i=$begin; $i < $end; $i++)
-          {
-          if ($sort_order == 'DESC')
-            $msgs = $msg_index[$i].','.$msgs;
-          else
-            $msgs = $msgs.','.$msg_index[$i];
-          }
+        for ($i=$begin+1; $i < $end; $i++)
+          $msgs = $msgs.','.$msg_index[$i];
 
         $sorted = TRUE;
         }
@@ -377,47 +554,23 @@
 
 
       // cache is dirty, sync it
-      if ($this->caching_enabled && $cache_status==-1)
+      if ($this->caching_enabled && $cache_status==-1 && !$recursive)
         {
         $this->sync_header_index($mailbox);
-        return $this->_list_headers($mailbox, $page, $sort_field, $sort_order);
+        return $this->_list_headers($mailbox, $page, $this->sort_field, $this->sort_order, TRUE);
         }      
 
-
-      // cache is incomplete
-      $cache_index = $this->get_message_cache_index($cache_key);
         
       // fetch reuested headers from server
-      $a_header_index = iil_C_FetchHeaders($this->conn, $mailbox, $msgs);
       $a_msg_headers = array();
-      
-      
-      if (!empty($a_header_index))
-        {
-        foreach ($a_header_index as $i => $headers)
-          {
-          if ($headers->deleted)
-            {
-            // delete from cache
-            if ($cache_index[$headers->id] && $cache_index[$headers->id] == $headers->uid)
-              $this->remove_message_cache($cache_key, $headers->id);
-
-            continue;
-            }
-
-          // add message to cache
-          if ($this->caching_enabled && $cache_index[$headers->id] != $headers->uid)
-            $this->add_message_cache($cache_key, $headers->id, $headers);
-
-          $a_msg_headers[$headers->uid] = $headers;
-          }
-        }
+      $deleted_count = $this->_fetch_headers($mailbox, $msgs, $a_msg_headers, $cache_key);
 
       // delete cached messages with a higher index than $max
       $this->clear_message_cache($cache_key, $max);
 
-
+        
       // kick child process to sync cache
+      // ...
       
       }
 
@@ -428,27 +581,213 @@
 
 
     // if not already sorted
-    if (!$headers_sorted)
-      $a_msg_headers = iil_SortHeaders($a_msg_headers, $sort_field, $sort_order);
+//    if (!$headers_sorted)
+//      $a_msg_headers = iil_SortHeaders($a_msg_headers, $this->sort_field, $this->sort_order);
+
+
+      if (!$headers_sorted && $this->sort_order == 'DESC')
+        $a_msg_headers = array_reverse($a_msg_headers);
+      
 
     return array_values($a_msg_headers);
     }
+    
 
-
-  // return sorted array of message UIDs
-  function message_index($mbox='', $sort_field='date', $sort_order='DESC')
+  /**
+   * Public method for listing a specific set of headers
+   * convert mailbox name with root dir first
+   *
+   * @param   string   Mailbox/folder name
+   * @param   array    List of message ids to list
+   * @param   number   Current page to list
+   * @param   string   Header field to sort by
+   * @param   string   Sort order [ASC|DESC]
+   * @return  array    Indexed array with message header objects
+   * @access  public   
+   */
+  function list_header_set($mbox='', $msgs, $page=NULL, $sort_field=NULL, $sort_order=NULL)
     {
     $mailbox = $mbox ? $this->_mod_mailbox($mbox) : $this->mailbox;
-    $a_out = array();
+    return $this->_list_header_set($mailbox, $msgs, $page, $sort_field, $sort_order);    
+    }
+    
 
-    // get array of message headers
-    $a_headers = $this->_list_headers($mailbox, 'all', $sort_field, $sort_order);
+  /**
+   * Private method for listing a set of message headers
+   *
+   * @access  private
+   * @see     rcube_imap::list_header_set
+   */
+  function _list_header_set($mailbox, $msgs, $page=NULL, $sort_field=NULL, $sort_order=NULL)
+    {
+    // also accept a comma-separated list of message ids
+    if (is_string($msgs))
+      $msgs = split(',', $msgs);
+      
+    if (!strlen($mailbox) || empty($msgs))
+      return array();
 
-    if (is_array($a_headers))
-      foreach ($a_headers as $header)
-        $a_out[] = $header->uid;
+    if ($sort_field!=NULL)
+      $this->sort_field = $sort_field;
+    if ($sort_order!=NULL)
+      $this->sort_order = strtoupper($sort_order);
 
-    return $a_out;
+    $max = count($msgs);
+    $start_msg = ($this->list_page-1) * $this->page_size;
+
+    // fetch reuested headers from server
+    $a_msg_headers = array();
+    $this->_fetch_headers($mailbox, join(',', $msgs), $a_msg_headers, NULL);
+
+    // return empty array if no messages found
+	if (!is_array($a_msg_headers) || empty($a_msg_headers))
+		return array();
+
+    // if not already sorted
+    $a_msg_headers = iil_SortHeaders($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), $start_msg, min($max-$start_msg, $this->page_size));
+    }
+
+
+  /**
+   * Helper function to get first and last index of the requested set
+   *
+   * @param  number  message count
+   * @param  mixed   page number to show, or string 'all'
+   * @return array   array with two values: first index, last index
+   * @access private
+   */
+  function _get_message_range($max, $page)
+    {
+    $start_msg = ($this->list_page-1) * $this->page_size;
+    
+    if ($page=='all')
+      {
+      $begin = 0;
+      $end = $max;
+      }
+    else if ($this->sort_order=='DESC')
+      {
+      $begin = $max - $this->page_size - $start_msg;
+      $end =   $max - $start_msg;
+      }
+    else
+      {
+      $begin = $start_msg;
+      $end   = $start_msg + $this->page_size;
+      }
+
+    if ($begin < 0) $begin = 0;
+    if ($end < 0) $end = $max;
+    if ($end > $max) $end = $max;
+    
+    return array($begin, $end);
+    }
+    
+    
+
+  /**
+   * Fetches message headers
+   * Used for loop
+   *
+   * @param  string  Mailbox name
+   * @param  string  Message index to fetch
+   * @param  array   Reference to message headers array
+   * @param  array   Array with cache index
+   * @return number  Number of deleted messages
+   * @access private
+   */
+  function _fetch_headers($mailbox, $msgs, &$a_msg_headers, $cache_key)
+    {
+    // cache is incomplete
+    $cache_index = $this->get_message_cache_index($cache_key);
+    
+    // fetch reuested headers from server
+    $a_header_index = iil_C_FetchHeaders($this->conn, $mailbox, $msgs);
+    $deleted_count = 0;
+    
+    if (!empty($a_header_index))
+      {
+      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->id);
+
+          $deleted_count++;
+          continue;
+          }
+
+        // add message to cache
+        if ($this->caching_enabled && $cache_index[$headers->id] != $headers->uid)
+          $this->add_message_cache($cache_key, $headers->id, $headers);
+
+        $a_msg_headers[$headers->uid] = $headers;
+        }
+      }
+        
+    return $deleted_count;
+    }
+    
+  
+  // return sorted array of message UIDs
+  function message_index($mbox='', $sort_field=NULL, $sort_order=NULL)
+    {
+    if ($sort_field!=NULL)
+      $this->sort_field = $sort_field;
+    if ($sort_order!=NULL)
+      $this->sort_order = strtoupper($sort_order);
+
+    $mailbox = $mbox ? $this->_mod_mailbox($mbox) : $this->mailbox;
+    $key = "$mbox:".$this->sort_field.":".$this->sort_order.".msgi";
+
+    // have stored it in RAM
+    if (isset($this->cache[$key]))
+      return $this->cache[$key];
+
+    // check local cache
+    $cache_key = $mailbox.'.msg';
+    $cache_status = $this->check_cache_status($mailbox, $cache_key);
+
+    // cache is OK
+    if ($cache_status>0)
+      {
+      $a_index = $this->get_message_cache_index($cache_key, TRUE, $this->sort_field, $this->sort_order);
+      return array_values($a_index);
+      }
+
+
+    // fetch complete message index
+    $msg_count = $this->_messagecount($mailbox);
+    if ($this->get_capability('sort') && ($a_index = iil_C_Sort($this->conn, $mailbox, $this->sort_field, '', TRUE)))
+      {
+      if ($this->sort_order == 'DESC')
+        $a_index = array_reverse($a_index);
+
+      $this->cache[$key] = $a_index;
+
+      }
+    else
+      {
+      $a_index = iil_C_FetchHeaderIndex($this->conn, $mailbox, "1:$msg_count", $this->sort_field);
+      $a_uids = iil_C_FetchUIDs($this->conn, $mailbox);
+    
+      if ($this->sort_order=="ASC")
+        asort($a_index);
+      else if ($this->sort_order=="DESC")
+        arsort($a_index);
+        
+      $i = 0;
+      $this->cache[$key] = array();
+      foreach ($a_index as $index => $value)
+        $this->cache[$key][$i++] = $a_uids[$index];
+      }
+
+    return $this->cache[$key];
     }
 
 
@@ -503,23 +842,57 @@
     }
 
 
-  function search($mbox='', $criteria='ALL')
+  /**
+   * Invoke search request to IMAP server
+   *
+   * @param  string  mailbox name to search in
+   * @param  string  search criteria (ALL, TO, FROM, SUBJECT, etc)
+   * @param  string  search string
+   * @return array   search results as list of message ids
+   * @access public
+   */
+  function search($mbox='', $criteria='ALL', $str=NULL)
     {
     $mailbox = $mbox ? $this->_mod_mailbox($mbox) : $this->mailbox;
+    if ($str && $criteria)
+      {
+      $criteria .= " \"$str\"";
+      return $this->_search_index($mailbox, $criteria);
+      }
+    else
+      return $this->_search_index($mailbox, $criteria);
+    }    
+
+
+  /**
+   * Private search method
+   *
+   * @return array   search results as list of message ids
+   * @access private
+   * @see rcube_imap::search()
+   */
+  function _search_index($mailbox, $criteria='ALL')
+    {
     $a_messages = iil_C_Search($this->conn, $mailbox, $criteria);
+    
+    // clean message list (there might be some empty entries)
+    foreach ($a_messages as $i => $val)
+      if (empty($val))
+        unset($a_messages[$i]);
+        
     return $a_messages;
     }
 
 
-  function get_headers($uid, $mbox=NULL)
+  function get_headers($id, $mbox=NULL, $is_uid=TRUE)
     {
     $mailbox = $mbox ? $this->_mod_mailbox($mbox) : $this->mailbox;
 
     // get cached headers
-    if ($headers = $this->get_cached_message($mailbox.'.msg', $uid))
+    if ($is_uid && ($headers = $this->get_cached_message($mailbox.'.msg', $id)))
       return $headers;
 
-    $msg_id = $this->_uid2id($uid);
+    $msg_id = $is_uid ? $this->_uid2id($id) : $id;
     $headers = iil_C_FetchHeader($this->conn, $mailbox, $msg_id);
 
     // write headers cache
@@ -570,20 +943,20 @@
       $uids = array($uids);
       
     foreach ($uids as $uid)
-      $msg_ids[] = $this->_uid2id($uid);
+      $msg_ids[$uid] = $this->_uid2id($uid);
       
     if ($flag=='UNSEEN')
-      $result = iil_C_Unseen($this->conn, $this->mailbox, join(',', $msg_ids));
+      $result = iil_C_Unseen($this->conn, $this->mailbox, join(',', array_values($msg_ids)));
     else
-      $result = iil_C_Flag($this->conn, $this->mailbox, join(',', $msg_ids), $flag);
+      $result = iil_C_Flag($this->conn, $this->mailbox, join(',', array_values($msg_ids)), $flag);
 
     // reload message headers if cached
     $cache_key = $this->mailbox.'.msg';
     if ($this->caching_enabled)
       {
-      foreach ($msg_ids as $id)
+      foreach ($msg_ids as $uid => $id)
         {
-        if ($cached_headers = $this->get_cached_message($cache_key, $id))
+        if ($cached_headers = $this->get_cached_message($cache_key, $uid))
           {
           $this->remove_message_cache($cache_key, $id);
           //$this->get_headers($uid);
@@ -596,7 +969,7 @@
       }
 
     // set nr of messages that were flaged
-    $count = sizeof($msg_ids);
+    $count = count($msg_ids);
 
     // clear message count cache
     if ($result && $flag=='SEEN')
@@ -615,7 +988,7 @@
     {
     $mailbox = $this->_mod_mailbox($mbox);
 
-    // make shure mailbox exists
+    // make sure mailbox exists
     if (in_array($mailbox, $this->_list_mailboxes()))
       $saved = iil_C_Append($this->conn, $mailbox, $message);
 
@@ -635,10 +1008,15 @@
     $to_mbox = $this->_mod_mailbox($to_mbox);
     $from_mbox = $from_mbox ? $this->_mod_mailbox($from_mbox) : $this->mailbox;
 
-    // make shure mailbox exists
+    // make sure mailbox exists
     if (!in_array($to_mbox, $this->_list_mailboxes()))
-      return FALSE;
-    
+      {
+      if (in_array(strtolower($to_mbox), $this->default_folders))
+        $this->create_mailbox($to_mbox, TRUE);
+      else
+        return FALSE;
+      }
+
     // convert the list of uids to array
     $a_uids = is_string($uids) ? explode(',', $uids) : (is_array($uids) ? $uids : NULL);
     
@@ -729,15 +1107,25 @@
 
 
   // clear all messages in a specific mailbox
-  function clear_mailbox($mbox)
+  function clear_mailbox($mbox=NULL)
     {
-    $mailbox = $mbox ? $this->_mod_mailbox($mbox) : $this->mailbox;
+    $mailbox = !empty($mbox) ? $this->_mod_mailbox($mbox) : $this->mailbox;
     $msg_count = $this->_messagecount($mailbox, 'ALL');
     
     if ($msg_count>0)
       {
-      $this->clear_message_cache($mailbox.'.msg');
-      return iil_C_ClearFolder($this->conn, $mailbox);
+      $cleared = iil_C_ClearFolder($this->conn, $mailbox);
+      
+      // make sure the message count cache is cleared as well
+      if ($cleared)
+        {
+        $this->clear_message_cache($mailbox.'.msg');      
+        $a_mailbox_cache = $this->get_cache('messagecount');
+        unset($a_mailbox_cache[$mailbox]);
+        $this->update_cache('messagecount', $a_mailbox_cache);
+        }
+        
+      return $cleared;
       }
     else
       return 0;
@@ -794,6 +1182,23 @@
     // filter folders and sort them
     $sa_unsubscribed = $this->_sort_mailbox_list($a_folders);
     return $sa_unsubscribed;
+    }
+
+
+  /**
+   * Get quota
+   * added by Nuny
+   */
+  function get_quota()
+    {
+    if ($this->get_capability('QUOTA'))
+      {
+      $result = iil_C_GetQuota($this->conn);
+      if ($result["total"])
+        return sprintf("%.2fMB / %.2fMB (%.0f%%)", $result["used"] / 1000.0, $result["total"] / 1000.0, $result["percent"]);       
+      }
+
+    return FALSE;
     }
 
 
@@ -1074,14 +1479,14 @@
       $header = iil_C_FetchHeader($this->conn, $mailbox, "$msg_count");
       $cache_uid = array_pop($cache_index);
       
-      // uids of highes message matches -> cache seems OK
+      // uids of highest message matches -> cache seems OK
       if ($cache_uid == $header->uid)
         return 1;
 
       // cache is dirty
       return -1;
       }
-    // if cache count differs less that 10% report as dirty
+    // if cache count differs less than 10% report as dirty
     else if (abs($msg_count - $cache_count) < $msg_count/10)
       return -1;
     else
@@ -1160,9 +1565,13 @@
     }
 
    
-  function get_message_cache_index($key, $force=FALSE)
+  function get_message_cache_index($key, $force=FALSE, $sort_col='idx', $sort_order='ASC')
     {
     static $sa_message_index = array();
+    
+    // empty key -> empty array
+    if (empty($key))
+      return array();
     
     if (!empty($sa_message_index[$key]) && !$force)
       return $sa_message_index[$key];
@@ -1173,7 +1582,7 @@
        FROM ".get_table_name('messages')."
        WHERE  user_id=?
        AND    cache_key=?
-       ORDER BY idx ASC",
+       ORDER BY ".$this->db->quote_identifier($sort_col)." ".$sort_order,
       $_SESSION['user_id'],
       $key);
 
@@ -1186,19 +1595,22 @@
 
   function add_message_cache($key, $index, $headers)
     {
+    if (!$key || !is_object($headers) || empty($headers->uid))
+      return;
+
     $this->db->query(
       "INSERT INTO ".get_table_name('messages')."
-       (user_id, del, cache_key, idx, uid, subject, ".$this->db->quoteIdentifier('from').", ".$this->db->quoteIdentifier('to').", cc, date, size, headers)
-       VALUES (?, 0, ?, ?, ?, ?, ?, ?, ?, ".$this->db->fromunixtime($headers->timestamp).", ?, ?)",
+       (user_id, del, cache_key, created, idx, uid, subject, ".$this->db->quoteIdentifier('from').", ".$this->db->quoteIdentifier('to').", cc, date, size, headers)
+       VALUES (?, 0, ?, now(), ?, ?, ?, ?, ?, ?, ".$this->db->fromunixtime($headers->timestamp).", ?, ?)",
       $_SESSION['user_id'],
       $key,
       $index,
       $headers->uid,
-      $this->decode_header($headers->subject, TRUE),
-      $this->decode_header($headers->from, TRUE),
-      $this->decode_header($headers->to, TRUE),
-      $this->decode_header($headers->cc, TRUE),
-      $headers->size,
+      (string)substr($this->decode_header($headers->subject, TRUE), 0, 128),
+      (string)substr($this->decode_header($headers->from, TRUE), 0, 128),
+      (string)substr($this->decode_header($headers->to, TRUE), 0, 128),
+      (string)substr($this->decode_header($headers->cc, TRUE), 0, 128),
+      (int)$headers->size,
       serialize($headers));
     }
     
@@ -1268,7 +1680,7 @@
 
   function decode_header($input, $remove_quotes=FALSE)
     {
-    $str = $this->decode_mime_string($input);
+    $str = $this->decode_mime_string((string)$input);
     if ($str{0}=='"' && $remove_quotes)
       {
       $str = str_replace('"', '', $str);
@@ -1323,10 +1735,10 @@
         $rest = quoted_printable_decode($rest);
         }
 
-      return decode_specialchars($rest, $a[0]);
+      return rcube_charset_convert($rest, $a[0]);
       }
     else
-      return $str;    //we dont' know what to do with this  
+      return $str;    // we dont' know what to do with this  
     }
 
 
@@ -1374,7 +1786,7 @@
   function charset_decode($body, $ctype_param)
     {
     if (is_array($ctype_param) && !empty($ctype_param['charset']))
-      return decode_specialchars($body, $ctype_param['charset']);
+      return rcube_charset_convert($body, $ctype_param['charset']);
 
     return $body;
     }
@@ -1423,6 +1835,15 @@
     return array_merge($a_defaults, $a_out);
     }
 
+  function get_id($uid) 
+    {
+      return $this->_uid2id($uid);
+    }
+  
+  function get_uid($id)
+    {
+      return $this->_id2uid($id);
+    }
 
   function _uid2id($uid, $mbox=NULL)
     {
@@ -1433,6 +1854,14 @@
       $this->uid_id_map[$mbox][$uid] = iil_C_UID2ID($this->conn, $mbox, $uid);
 
     return $this->uid_id_map[$mbox][$uid];
+    }
+
+  function _id2uid($id, $mbox=NULL)
+    {
+    if (!$mbox)
+      $mbox = $this->mailbox;
+      
+    return iil_C_ID2UID($this->conn, $mbox, $id);
     }
 
 
@@ -1518,6 +1947,10 @@
     
     // add incremental value to messagecount
     $a_mailbox_cache[$mailbox][$mode] += $increment;
+    
+    // there's something wrong, delete from cache
+    if ($a_mailbox_cache[$mailbox][$mode] < 0)
+      unset($a_mailbox_cache[$mailbox][$mode]);
 
     // write back to cache
     $this->update_cache('messagecount', $a_mailbox_cache);
@@ -1648,4 +2081,4 @@
   return trim($output);
   }
 
-?>
+?>
\ No newline at end of file

--
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