Add interface for Session and add getter in server container.

lib/public/iservercontainer.php

@@ -62,4 +62,11 @@ interface IServerContainer {
 	 */
 	function getRootFolder();
 
+	/**
+	 * Returns the current session
+	 *
+	 * @return \OCP\ISession
+	 */
+	function getSession();
+
 }

lib/public/isession.php

@@ -0,0 +1,44 @@
+<?php
+/**
+ * Copyright (c) 2013 Thomas Tanghus (thomas@tanghus.net)
+ * @author Thomas Tanghus
+ * @author Robin Appelman
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OCP;
+
+interface ISession {
+	/**
+	 * @param string $key
+	 * @param mixed $value
+	 */
+	public function set($key, $value);
+
+	/**
+	 * @param string $key
+	 * @return mixed should return null if $key does not exist
+	 */
+	public function get($key);
+
+	/**
+	 * @param string $key
+	 * @return bool
+	 */
+	public function exists($key);
+
+	/**
+	 * should not throw any errors if $key does not exist
+	 *
+	 * @param string $key
+	 */
+	public function remove($key);
+
+	/**
+	 * removes all entries within the cache namespace
+	 */
+	public function clear();
+
+}

lib/server.php

@@ -97,4 +97,14 @@ class Server extends SimpleContainer implements IServerContainer {
 	{
 		return $this->query('RootFolder');
 	}
+
+	/**
+	 * Returns the current session
+	 *
+	 * @return \OCP\ISession
+	 */
+	function getSession() {
+		return \OC::$session;
+	}
+
 }

lib/session/session.php

@@ -8,7 +8,7 @@
 
 namespace OC\Session;
 
-abstract class Session implements \ArrayAccess {
+abstract class Session implements \ArrayAccess, \OCP\ISession {
 	/**
 	 * $name serves as a namespace for the session keys
 	 *