From fbe54043cf598b19a753dc2b21a7ed558d23fd15 Mon Sep 17 00:00:00 2001
From: thomascube <thomas@roundcube.net>
Date: Thu, 18 Aug 2011 13:40:07 -0400
Subject: [PATCH] Fix folders drop-down list: descend into root folder (e.g. INBOX) even if part of the exception list

---
 program/include/rcube_mdb2.php |   72 ++++++++++++++++++++++++++++++------
 1 files changed, 60 insertions(+), 12 deletions(-)

diff --git a/program/include/rcube_mdb2.php b/program/include/rcube_mdb2.php
index a68d1dd..b3976c3 100644
--- a/program/include/rcube_mdb2.php
+++ b/program/include/rcube_mdb2.php
@@ -44,6 +44,7 @@
     var $db_error_msg = '';
 
     private $debug_mode = false;
+    private $write_failure = false;
     private $a_query_results = array('dummy');
     private $last_res_id = 0;
     private $tables;
@@ -83,7 +84,7 @@
             'persistent'       => $this->db_pconn,
             'emulate_prepared' => $this->debug_mode,
             'debug'            => $this->debug_mode,
-            'debug_handler'    => 'mdb2_debug_handler',
+            'debug_handler'    => array($this, 'debug_handler'),
             'portability'      => MDB2_PORTABILITY_ALL ^ MDB2_PORTABILITY_EMPTY_TO_NULL);
 
         if ($this->db_provider == 'pgsql') {
@@ -124,7 +125,7 @@
         // Already connected
         if ($this->db_connected) {
             // connected to read-write db, current connection is ok
-            if ($this->db_mode == 'w')
+            if ($this->db_mode == 'w' && !$this->write_failure)
                 return;
 
             // no replication, current connection is ok for read and write
@@ -189,6 +190,16 @@
 
 
     /**
+     * Is database replication configured?
+     * This returns true if dsnw != dsnr
+     */
+    function is_replicated()
+    {
+      return !empty($this->db_dsnr) && $this->db_dsnw != $this->db_dsnr;
+    }
+
+
+    /**
      * Execute a SQL query
      *
      * @param  string  SQL query to execute
@@ -245,6 +256,10 @@
         // Read or write ?
         $mode = (strtolower(substr(trim($query),0,6)) == 'select') ? 'r' : 'w';
 
+        // don't event attempt to connect if previous write-operation failed
+        if ($this->write_failure && $mode == 'w')
+            return false;
+
         $this->db_connect($mode);
 
         // check connection before proceeding
@@ -277,6 +292,10 @@
                 $q->free();
             }
         }
+
+        // remember that write-operation failed
+        if ($mode == 'w' && ($result === false || PEAR::isError($result)))
+            $this->write_failure = true;
 
         // add result, even if it's an error
         return $this->_add_result($result);
@@ -600,6 +619,34 @@
         }
     }
 
+    /**
+     * Abstract SQL statement for value concatenation
+     *
+     * @return string SQL statement to be used in query
+     * @access public
+     */
+    function concat(/* col1, col2, ... */)
+    {
+        $func = '';
+        $args = func_get_args();
+
+        switch($this->db_provider) {
+            case 'mysql':
+            case 'mysqli':
+                $func = 'CONCAT';
+                $delim = ', ';
+                break;
+            case 'mssql':
+            case 'sqlsrv':
+                $delim = ' + ';
+                break;
+            default:
+                $delim = ' || ';
+        }
+
+        return $func . '(' . join($delim, $args) . ')';
+    }
+
 
     /**
      * Encodes non-UTF-8 characters in string/array/object (recursive)
@@ -740,16 +787,17 @@
             'md5', 'rcube_sqlite_md5');
     }
 
-}  // end class rcube_db
 
-
-/* this is our own debug handler for the MDB2 connection */
-function mdb2_debug_handler(&$db, $scope, $message, $context = array())
-{
-    if ($scope != 'prepare') {
-        $debug_output = sprintf('%s(%d): %s;',
-            $scope, $db->db_index, rtrim($message, ';'));
-        write_log('sql', $debug_output);
+    /**
+     * Debug handler for the MDB2
+     */
+    function debug_handler(&$db, $scope, $message, $context = array())
+    {
+        if ($scope != 'prepare') {
+            $debug_output = sprintf('%s(%d): %s;',
+                $scope, $db->db_index, rtrim($message, ';'));
+            write_log('sql', $debug_output);
+        }
     }
-}
 
+}  // end class rcube_db

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