From 8018757b75262d009bc6611be76bf4696d549caa Mon Sep 17 00:00:00 2001
From: Nathan Kinkade <nkinkade@nkinka.de>
Date: Sun, 15 Mar 2009 20:00:02 +0000
Subject: Change-set to let the IMAP server do the sensible sorting of threads
 i.e. sort threads by newest in-thread messages rather than simply by the root
 thread message.

---
 roundcubemail/program/include/rcube_imap.php | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

(limited to 'roundcubemail/program/include')

diff --git a/roundcubemail/program/include/rcube_imap.php b/roundcubemail/program/include/rcube_imap.php
index 2f3a49cb1..b8c44fcae 100644
--- a/roundcubemail/program/include/rcube_imap.php
+++ b/roundcubemail/program/include/rcube_imap.php
@@ -48,8 +48,8 @@ class rcube_imap
   var $mailbox = 'INBOX';
   var $list_page = 1;
   var $page_size = 10;
-  var $sort_field = 'date';
-  var $sort_order = 'DESC';
+  var $sort_field = NULL;
+  var $sort_order = NULL;
   var $delimiter = NULL;
   var $caching_enabled = FALSE;
   var $thread_caching_enabled = FALSE;
@@ -545,7 +545,7 @@ class rcube_imap
             if ($sql_arr = $this->db->fetch_array($sql_result))
                 return $sql_arr[0];
         }
-        list ($thread_tree, $msg_depth, $has_children) = iil_C_Thread($this->conn, $mailbox, 'REFERENCES', 'ALL');
+        list ($thread_tree, $msg_depth, $has_children) = iil_C_Thread($this->conn, $mailbox, rcmail::get_instance()->config->get('imap_thread_algorithm'), 'ALL');
         $this->update_thread_cache($mailbox, $thread_tree, $msg_depth, $has_children);
         return count($thread_tree);
     }
@@ -620,7 +620,7 @@ class rcube_imap
                     $msg_depth = $this->cache['__threads']['depth'];
                     $has_children = $this->cache['__threads']['has_children'];
                 } else {
-                    list ($thread_tree, $msg_depth, $has_children) = iil_C_Thread($this->conn, $mailbox, 'REFERENCES', 'ALL');
+                    list ($thread_tree, $msg_depth, $has_children) = iil_C_Thread($this->conn, $mailbox, rcmail::get_instance()->config->get('imap_thread_algorithm'), 'ALL');
                 }
                 $this->update_thread_cache($mailbox, $thread_tree, $msg_depth, $has_children);
                 // the keys of thread_tree are the thread roots
@@ -640,6 +640,8 @@ class rcube_imap
             // sort the roots according to the order defined by $sort_index
             $sorter = new rcube_thread_root_sorter();
             $sorter->set_sequence_numbers($sort_index);
+            if (isset($this->sort_order))
+              $sorter->default_sort = false;
             $sorter->sort_threads($roots);
             
             // get the roots for this page
@@ -647,7 +649,7 @@ class rcube_imap
         }
 
         if ($thread_cache_status > 0) {
-        	// get the children of $roots from the cache
+            // get the children of $roots from the cache
             $threads = $this->get_thread_cache_threads($mailbox, $roots);
             $msg_index = array ();
             $msg_depth = array ();
@@ -3528,6 +3530,11 @@ class rcube_thread_root_sorter
 {
     var $sequence_numbers = array ();
 
+    // If this is true then we override any sorting
+    // and let the IMAP server do it, otherwise try
+    // to sort according to the user request.
+    var $default_sort = true;
+
     /**
      * Set the predetermined sort order.
      *
@@ -3545,6 +3552,12 @@ class rcube_thread_root_sorter
      */
     function sort_threads(& $threads)
     {
+        if ($this->default_sort)
+          {
+          $threads = array_reverse($threads);
+          return;
+          }
+        
         usort($threads, array (
               $this,
               "compare_seqnums"
-- 
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