Imported Upstream version 0.6.24+dfsg1

lib/kohana/system/libraries/drivers/Session/Database.php

@@ -0,0 +1,163 @@
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+ * Session database driver.
+ *
+ * $Id: Database.php 3769 2008-12-15 00:48:56Z zombor $
+ *
+ * @package    Core
+ * @author     Kohana Team
+ * @copyright  (c) 2007-2008 Kohana Team
+ * @license    http://kohanaphp.com/license.html
+ */
+class Session_Database_Driver implements Session_Driver {
+
+	/*
+	CREATE TABLE sessions
+	(
+		session_id VARCHAR(127) NOT NULL,
+		last_activity INT(10) UNSIGNED NOT NULL,
+		data TEXT NOT NULL,
+		PRIMARY KEY (session_id)
+	);
+	*/
+
+	// Database settings
+	protected $db = 'default';
+	protected $table = 'sessions';
+
+	// Encryption
+	protected $encrypt;
+
+	// Session settings
+	protected $session_id;
+	protected $written = FALSE;
+
+	public function __construct()
+	{
+		// Load configuration
+		$config = Kohana::config('session');
+
+		if ( ! empty($config['encryption']))
+		{
+			// Load encryption
+			$this->encrypt = Encrypt::instance();
+		}
+
+		if (is_array($config['storage']))
+		{
+			if ( ! empty($config['storage']['group']))
+			{
+				// Set the group name
+				$this->db = $config['storage']['group'];
+			}
+
+			if ( ! empty($config['storage']['table']))
+			{
+				// Set the table name
+				$this->table = $config['storage']['table'];
+			}
+		}
+
+		// Load database
+		$this->db = Database::instance($this->db);
+
+		Kohana::log('debug', 'Session Database Driver Initialized');
+	}
+
+	public function open($path, $name)
+	{
+		return TRUE;
+	}
+
+	public function close()
+	{
+		return TRUE;
+	}
+
+	public function read($id)
+	{
+		// Load the session
+		$query = $this->db->from($this->table)->where('session_id', $id)->limit(1)->get()->result(TRUE);
+
+		if ($query->count() === 0)
+		{
+			// No current session
+			$this->session_id = NULL;
+
+			return '';
+		}
+
+		// Set the current session id
+		$this->session_id = $id;
+
+		// Load the data
+		$data = $query->current()->data;
+
+		return ($this->encrypt === NULL) ? base64_decode($data) : $this->encrypt->decode($data);
+	}
+
+	public function write($id, $data)
+	{
+		$data = array
+		(
+			'session_id' => $id,
+			'last_activity' => time(),
+			'data' => ($this->encrypt === NULL) ? base64_encode($data) : $this->encrypt->encode($data)
+		);
+
+		if ($this->session_id === NULL)
+		{
+			// Insert a new session
+			$query = $this->db->insert($this->table, $data);
+		}
+		elseif ($id === $this->session_id)
+		{
+			// Do not update the session_id
+			unset($data['session_id']);
+
+			// Update the existing session
+			$query = $this->db->update($this->table, $data, array('session_id' => $id));
+		}
+		else
+		{
+			// Update the session and id
+			$query = $this->db->update($this->table, $data, array('session_id' => $this->session_id));
+
+			// Set the new session id
+			$this->session_id = $id;
+		}
+
+		return (bool) $query->count();
+	}
+
+	public function destroy($id)
+	{
+		// Delete the requested session
+		$this->db->delete($this->table, array('session_id' => $id));
+
+		// Session id is no longer valid
+		$this->session_id = NULL;
+
+		return TRUE;
+	}
+
+	public function regenerate()
+	{
+		// Generate a new session id
+		session_regenerate_id();
+
+		// Return new session id
+		return session_id();
+	}
+
+	public function gc($maxlifetime)
+	{
+		// Delete all expired sessions
+		$query = $this->db->delete($this->table, array('last_activity <' => time() - $maxlifetime));
+
+		Kohana::log('debug', 'Session garbage collected: '.$query->count().' row(s) deleted.');
+
+		return TRUE;
+	}
+
+} // End Session Database Driver