Added PEAR:DB support plus database replication support

1 files changed, 202 insertions, 0 deletions

diff --git a/program/include/rcube_db.inc b/program/include/rcube_db.inc
new file mode 100755
index 000000000..f4dc222a5
--- /dev/null
+++ b/program/include/rcube_db.inc
@@ -0,0 +1,202 @@
+<?php
+
+/*
+ +-----------------------------------------------------------------------+
+ | program/include/rcube_db.inc                                          |
+ |                                                                       |
+ | This file is part of the RoundCube Webmail client                     |
+ | Copyright (C) 2005, RoundCube Dev. - Switzerland                      |
+ | Licensed under the GNU GPL                                            |
+ |                                                                       |
+ | PURPOSE:                                                              |
+ |   PEAR:DB wrapper class that implements PEAR DB functions             |
+ |   See http://pear.php.net/package/DB                                  |
+ |                                                                       |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com>                        |
+ +-----------------------------------------------------------------------+
+
+ $Id$
+
+*/
+
+require_once('DB.php');
+
+class rcube_db
+{
+    var $db_dsnw;				// DSN for write operations
+    var $db_dsnr;				// DSN for read operations
+    var $db_connected=false;	// Already connected ?
+	var $db_mode='';			// Connection mode
+	var $db_handle=0;			// Connection handle
+
+    var $a_query_results = array('dummy');
+    var $last_res_id = 0;
+
+    // PHP 5 constructor
+    function __construct($db_dsnw,$db_dsnr='')
+    {
+		if ($db_dsnr=='') $db_dsnr=$db_dsnw;
+		
+        $this->db_dsnw = $db_dsnw;
+        $this->db_dsnr = $db_dsnr;
+    }
+
+    // PHP 4 compatibility
+    function rcube_db($db_dsnw,$db_dsnr='')
+    {
+        $this->__construct($db_dsnw,$db_dsnr);
+    }
+
+	// Connect to specific database	
+	function dsn_connect($dsn)
+	{
+		$dbh = DB::connect($dsn);
+
+		if (DB::isError($dbh))
+			raise_error(array('code' => 500,
+                        'type' => 'db',
+                        'line' => __LINE__,
+                        'file' => __FILE__,
+                        'message' => $dbh->getMessage()), TRUE, FALSE);
+		return $dbh;
+	}
+
+	// Connect to appropiate databse	
+	function db_connect ($mode)
+	{
+		if ($this->db_connected && $this->db_mode=='w') return;
+
+		if ($this->db_connected && $this->db_mode==$mode) return;
+
+		if ($mode=='r')
+			$dsn=$this->db_dsnr;
+		else
+			$dsn=$this->db_dsnw;
+
+		$this->db_handle = $this->dsn_connect($dsn);
+		$this->db_connected = true;
+		$this->db_mode = $mode;
+	}
+
+	// Query database (read operations)
+	
+    function query($query)
+    {
+		// Read or write ?
+		
+		if (strtolower(trim(substr($query,0,6)))=='select')
+			$mode='r';
+		else
+			{
+			$mode='w';
+			}
+		
+		$this->db_connect($mode);			
+    
+        $result = $this->db_handle->query($query);
+        
+        if (DB::isError($result))
+			raise_error( array('code' => 500, 'type' => 'db', 'line' => __LINE__, 
+			             'file' => __FILE__, 
+			             'message' => $result->getMessage()), TRUE, FALSE);
+        
+        return $this->_add_result($result, $query);
+    }
+
+	function db_execute ($query)
+	{
+		db_connect('w');
+
+		$result = $this->db_handle->query($query);
+
+	}
+	
+	function num_rows($res_id=NULL)
+    {
+        if (!$this->db_handle)
+            return FALSE;
+
+        $result = $this->_get_result($res_id);
+    
+        if ($result)    
+              return $result->numRows();
+        else
+              return FALSE;
+    }
+
+    function affected_rows($res_id=NULL)
+    {
+        if (!$this->db_handle)
+            return FALSE;
+    
+        return $this->last_res_id->affectedRows();
+    }
+
+    function insert_id($sequence = '')
+    {
+        if (!$this->db_link || $this->db_mode=='r')
+            return FALSE;
+
+        switch($this->db_provider)
+        {
+            case 'pgsql':
+                // PostgreSQL uses sequences
+                $result =& $this->db_handle->getOne("SELECT CURRVAL('$sequence')");    
+                if (DB::isError($result))
+                    raise_error( array('code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__, 
+                    'message' => $result->getMessage()), TRUE, TRUE);
+                return $result;
+                
+            case 'mysql': // This is unfortuneate
+                return mysql_insert_id($this->db_handle);
+                
+            default:
+                die("portability issue with this database, please have the developer fix");
+        }
+    }
+
+
+    function fetch_assoc($res_id=NULL)
+    {
+        $result = $this->_get_result($res_id);
+
+        if (DB::isError($result))
+            raise_error( array('code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__,
+                         'message' => $this->db_link->getMessage()), TRUE, TRUE);
+                         
+        return $result->fetchRow(DB_FETCHMODE_ASSOC);
+    }
+
+    function _add_result($res, $query)
+    {
+        // sql error occured
+        if (DB::isError($res))
+        {
+            raise_error(array('code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__, 'message' => $res->getMessage() . " Query: " . preg_replace('/[\r\n]+\s*/', ' ', $query)), TRUE, FALSE);
+             return FALSE;
+        }
+        else
+        {
+            $res_id = sizeof($this->a_query_results);
+            $this->a_query_results[$res_id] = $res;
+            $this->last_res_id = $res_id;
+            return $res_id;
+        }
+    }
+
+
+    function _get_result($res_id)
+    {
+        if ($res_id==NULL)
+            $res_id = $this->last_res_id;
+    
+        if ($res_id && isset($this->a_query_results[$res_id]))
+            return $this->a_query_results[$res_id];
+        else
+        return FALSE;
+    }
+
+}
+
+?>
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