New database layer based on PHP PDO

1 files changed, 92 insertions, 0 deletions

diff --git a/program/include/rcube_db_mysql.php b/program/include/rcube_db_mysql.php
new file mode 100644
index 000000000..3eeee2ada
--- /dev/null
+++ b/program/include/rcube_db_mysql.php
@@ -0,0 +1,92 @@
+<?php
+
+/*
+ +-----------------------------------------------------------------------+
+ | program/include/rcube_db_mysql.php                                    |
+ |                                                                       |
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2012, The Roundcube Dev Team                       |
+ |                                                                       |
+ | Licensed under the GNU General Public License version 3 or            |
+ | any later version with exceptions for skins & plugins.                |
+ | See the README file for a full license statement.                     |
+ |                                                                       |
+ | PURPOSE:                                                              |
+ |   Database wrapper class that implements PHP PDO functions            |
+ |   for MySQL database                                                  |
+ |                                                                       |
+ +-----------------------------------------------------------------------+
+ | Author: Aleksander Machniak <alec@alec.pl>                            |
+ +-----------------------------------------------------------------------+
+*/
+
+
+/**
+ * Database independent query interface
+ *
+ * This is a wrapper for the PHP PDO
+ *
+ * @package    Database
+ * @version    1.0
+ */
+class rcube_db_mysql extends rcube_db
+{
+    protected function init()
+    {
+        // SQL identifiers quoting
+        $this->options['identifier_start'] = '`';
+        $this->options['identifier_end'] = '`';
+    }
+
+
+    /**
+     * Abstract SQL statement for value concatenation
+     *
+     * @return string SQL statement to be used in query
+     */
+    public function concat(/* col1, col2, ... */)
+    {
+        $args = func_get_args();
+
+        if (is_array($args[0])) {
+            $args = $args[0];
+        }
+
+        return 'CONCAT(' . join(', ', $args) . ')';
+    }
+
+
+    /**
+     * Returns PDO DSN string from DSN array (parse_dsn() result)
+     */
+    protected function dsn_string($dsn)
+    {
+        $params = array();
+        $result = 'mysql:';
+
+        if ($dsn['database']) {
+            $params[] = 'dbname=' . $dsn['database'];
+        }
+
+        if ($dsn['hostspec']) {
+            $params[] = 'host=' . $dsn['hostspec'];
+        }
+
+        if ($dsn['port']) {
+            $params[] = 'port=' . $dsn['port'];
+        }
+
+        if ($dsn['socket']) {
+            $params[] = 'unix_socket=' . $dsn['socket'];
+        }
+
+        $params[] = 'charset=utf8';
+
+        if (!empty($params)) {
+            $result .= implode(';', $params);
+        }
+
+        return $result;
+    }
+
+}