4 files changed, 67 insertions, 15 deletions
diff --git a/lib/user/backend.php b/lib/user/backend.php
index be068a63ce0..daa942d261c 100644
--- a/lib/user/backend.php
+++ b/lib/user/backend.php
@@ -42,7 +42,7 @@ define('OC_USER_BACKEND_CHECK_PASSWORD',    0x000100);
  *
  * Subclass this for your own backends, and see OC_User_Example for descriptions
  */
-abstract class OC_User_Backend {
+abstract class OC_User_Backend implements OC_User_Interface {
 
 	protected $possibleActions = array(
 		OC_USER_BACKEND_CREATE_USER => 'createUser',
diff --git a/lib/user/database.php b/lib/user/database.php
index a48b8357d64..cc27b3ddbfd 100644
--- a/lib/user/database.php
+++ b/lib/user/database.php
@@ -39,7 +39,6 @@ require_once 'phpass/PasswordHash.php';
  * Class for user management in a SQL Database (e.g. MySQL, SQLite)
  */
 class OC_User_Database extends OC_User_Backend {
-	static private $userGroupCache=array();
 	/**
 	 * @var PasswordHash
 	 */
@@ -87,7 +86,7 @@ class OC_User_Database extends OC_User_Backend {
 	public function deleteUser( $uid ){
 		// Delete user-group-relation
 		$query = OC_DB::prepare( "DELETE FROM `*PREFIX*users` WHERE uid = ?" );
-		$result = $query->execute( array( $uid ));
+		$query->execute( array( $uid ));
 		return true;
 	}
 
@@ -104,11 +103,10 @@ class OC_User_Database extends OC_User_Backend {
 			$hasher=$this->getHasher();
 			$hash = $hasher->HashPassword($password.OC_Config::getValue('passwordsalt', ''));
 			$query = OC_DB::prepare( "UPDATE *PREFIX*users SET password = ? WHERE uid = ?" );
-			$result = $query->execute( array( $hash, $uid ));
+			$query->execute( array( $hash, $uid ));
 
 			return true;
-		}
-		else{
+		}else{
 			return false;
 		}
 	}
diff --git a/lib/user/example.php b/lib/user/example.php
index 7f3fd1b8578..77246d8136c 100644
--- a/lib/user/example.php
+++ b/lib/user/example.php
@@ -35,9 +35,7 @@ abstract class OC_User_Example extends OC_User_Backend {
 		* Creates a new user. Basic checking of username is done in OC_User
 		* itself, not in its subclasses.
 		*/
-	public function createUser($uid, $password){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
+	abstract public function createUser($uid, $password);
 
 	/**
 		* @brief Set password
@@ -47,9 +45,7 @@ abstract class OC_User_Example extends OC_User_Backend {
 		*
 		* Change the password of a user
 		*/
-	public function setPassword($uid, $password){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
+	abstract public function setPassword($uid, $password);
 
 	/**
 		* @brief Check if the password is correct
@@ -60,7 +56,5 @@ abstract class OC_User_Example extends OC_User_Backend {
 		* Check if the password is correct without logging in the user
 		* returns the user id or false
 		*/
-	public function checkPassword($uid, $password){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
+	abstract public function checkPassword($uid, $password);
 }
diff --git a/lib/user/interface.php b/lib/user/interface.php
new file mode 100644
index 00000000000..dc3685dc20d
--- /dev/null
+++ b/lib/user/interface.php
@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * ownCloud - user interface
+ *
+ * @author Arthur Schiwon
+ * @copyright 2012 Arthur Schiwon blizzz@owncloud.org
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+interface OC_User_Interface {
+
+	/**
+	* @brief Check if backend implements actions
+	* @param $actions bitwise-or'ed actions
+	* @returns boolean
+	*
+	* Returns the supported actions as int to be
+	* compared with OC_USER_BACKEND_CREATE_USER etc.
+	*/
+	public function implementsActions($actions);
+
+	/**
+	* @brief delete a user
+	* @param $uid The username of the user to delete
+	* @returns true/false
+	*
+	* Deletes a user
+	*/
+	public function deleteUser($uid);
+
+	/**
+	* @brief Get a list of all users
+	* @returns array with all uids
+	*
+	* Get a list of all users.
+	*/
+	public function getUsers();
+
+	/**
+	* @brief check if a user exists
+	* @param string $uid the username
+	* @return boolean
+	*/
+	public function userExists($uid);
+
+}
+\ No newline at end of file