Implement default functions in OC_User backend

Simplifies calling these functions, and makes code simpler

functions:
deleteUser
getUsers
userExists

apps/user_openid/user_openid.php

@@ -24,7 +24,7 @@
 require_once('class.openid.v3.php');
 
 /**
- * Class for user management in a SQL Database (e.g. MySQL, SQLite)
+ * Class for user OpenId backend
  */
 class OC_USER_OPENID extends OC_User_Backend {
 	/**

lib/user.php

@@ -161,9 +161,7 @@ class OC_User {
 		if( $run ){
 			//delete the user from all backends
 			foreach(self::$_usedBackends as $backend){
-				if($backend->implementsActions(OC_USER_BACKEND_DELETE_USER)){
-					$backend->deleteUser($uid);
-				}
+				$backend->deleteUser($uid);
 			}
 			// We have to delete the user from all groups
 			foreach( OC_Group::getUserGroups( $uid ) as $i ){
@@ -323,11 +321,9 @@ class OC_User {
 	public static function getUsers(){
 		$users=array();
 		foreach(self::$_usedBackends as $backend){
-			if($backend->implementsActions(OC_USER_BACKEND_GET_USERS)){
-				$backendUsers=$backend->getUsers();
-				if(is_array($backendUsers)){
-					$users=array_merge($users,$backendUsers);
-				}
+			$backendUsers=$backend->getUsers();
+			if(is_array($backendUsers)){
+				$users=array_merge($users,$backendUsers);
 			}
 		}
 		return $users;
@@ -340,11 +336,9 @@ class OC_User {
 	 */
 	public static function userExists($uid){
 		foreach(self::$_usedBackends as $backend){
-			if($backend->implementsActions(OC_USER_BACKEND_USER_EXISTS)){
-				$result=$backend->userExists($uid);
-				if($result===true){
-					return true;
-				}
+			$result=$backend->userExists($uid);
+			if($result===true){
+				return true;
 			}
 		}
 		return false;

lib/user/backend.php

@@ -32,11 +32,8 @@ define('OC_USER_BACKEND_NOT_IMPLEMENTED',   -501);
  * actions that user backends can define
  */
 define('OC_USER_BACKEND_CREATE_USER',       0x000001);
-define('OC_USER_BACKEND_DELETE_USER',       0x000010);
-define('OC_USER_BACKEND_SET_PASSWORD',      0x000100);
-define('OC_USER_BACKEND_CHECK_PASSWORD',    0x001000);
-define('OC_USER_BACKEND_GET_USERS',         0x010000);
-define('OC_USER_BACKEND_USER_EXISTS',       0x100000);
+define('OC_USER_BACKEND_SET_PASSWORD',      0x000010);
+define('OC_USER_BACKEND_CHECK_PASSWORD',    0x000100);
 
 
 /**
@@ -47,11 +44,8 @@ abstract class OC_User_Backend {
 
 	protected $possibleActions = array(
 		OC_USER_BACKEND_CREATE_USER => 'createUser',
-		OC_USER_BACKEND_DELETE_USER => 'deleteUser',
 		OC_USER_BACKEND_SET_PASSWORD => 'setPassword',
 		OC_USER_BACKEND_CHECK_PASSWORD => 'checkPassword',
-		OC_USER_BACKEND_GET_USERS => 'getUsers',
-		OC_USER_BACKEND_USER_EXISTS => 'userExists'
 	);
 
 	/**
@@ -83,4 +77,34 @@ abstract class OC_User_Backend {
 	public function implementsActions($actions){
 		return (bool)($this->getSupportedActions() & $actions);
 	}
+
+	/**
+	* @brief delete a user
+	* @param $uid The username of the user to delete
+	* @returns true/false
+	*
+	* Deletes a user
+	*/
+	public function deleteUser( $uid ){
+		return false;
+	}
+
+	/**
+	* @brief Get a list of all users
+	* @returns array with all uids
+	*
+	* Get a list of all users.
+	*/
+	public function getUsers(){
+		return array();
+	}
+
+	/**
+	* @brief check if a user exists
+	* @param string $uid the username
+	* @return boolean
+	*/
+	public function userExists($uid){
+		return false;
+	}
 }

lib/user/example.php

@@ -39,17 +39,6 @@ abstract class OC_User_Example extends OC_User_Backend {
 		return OC_USER_BACKEND_NOT_IMPLEMENTED;
 	}
 
-	/**
-		* @brief delete a user
-		* @param $uid The username of the user to delete
-		* @returns true/false
-		*
-		* Deletes a user
-		*/
-	public function deleteUser( $uid ){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
-
 	/**
 		* @brief Set password
 		* @param $uid The username
@@ -73,23 +62,4 @@ abstract class OC_User_Example extends OC_User_Backend {
 	public function checkPassword($uid, $password){
 		return OC_USER_BACKEND_NOT_IMPLEMENTED;
 	}
-
-	/**
-		* @brief Get a list of all users
-		* @returns array with all uids
-		*
-		* Get a list of all users.
-		*/
-	public function getUsers(){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
-
-	/**
-		* @brief check if a user exists
-		* @param string $uid the username
-		* @return boolean
-		*/
-	public function userExists($uid){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
 }