use proper return codes and handle failure cases

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

settings/Controller/UsersController.php

@@ -567,7 +567,8 @@ class UsersController extends Controller {
 					'data' => array(
 						'message' => (string)$this->l10n->t('Error while disabling user.')
 					)
-				)
+				),
+				Http::STATUS_FORBIDDEN
 			);
 		}
 	}
@@ -624,7 +625,8 @@ class UsersController extends Controller {
 					'data' => array(
 						'message' => (string)$this->l10n->t('Error while enabling user.')
 					)
-				)
+				),
+				Http::STATUS_FORBIDDEN
 			);
 		}
 	}

settings/js/users/users.js

@@ -949,7 +949,15 @@ $(document).ready(function () {
 					OC.dialogs.alert(result.data.message, t('settings', 'Error while changing status of {user}', {user: uid}));
 				}
 			}
-		);
+		).fail(function(result){
+			var message = 'Unknown error';
+			if( result.responseJSON &&
+				result.responseJSON.data &&
+				result.responseJSON.data.message) {
+				message = result.responseJSON.data.message;
+			}
+			OC.dialogs.alert(message, t('settings', 'Error while changing status of {user}', {user: uid}));
+		});
 	});
 	
 	// init the quota field select box after it is shown the first time

tests/Settings/Controller/UsersControllerTest.php

@@ -2532,7 +2532,8 @@ class UsersControllerTest extends \Test\TestCase {
 				'data' => [
 					'message' => 'Error while disabling user.',
 				],
-			]
+			],
+			Http::STATUS_FORBIDDEN
 		);
 		$response = $this->getController(true)->disable('abc');
 		$this->assertEquals($expectedResponse, $response);
@@ -2569,7 +2570,8 @@ class UsersControllerTest extends \Test\TestCase {
 				'data' => [
 					'message' => 'Error while disabling user.',
 				],
-			]
+			],
+			Http::STATUS_FORBIDDEN
 		);
 		$response = $this->getController(false)->disable('abc');
 		$this->assertEquals($expectedResponse, $response);
@@ -2746,7 +2748,8 @@ class UsersControllerTest extends \Test\TestCase {
 				'data' => [
 					'message' => 'Error while enabling user.',
 				],
-			]
+			],
+			Http::STATUS_FORBIDDEN
 		);
 		$response = $this->getController(true)->enable('abc');
 		$this->assertEquals($expectedResponse, $response);
@@ -2783,7 +2786,8 @@ class UsersControllerTest extends \Test\TestCase {
 				'data' => [
 					'message' => 'Error while enabling user.',
 				],
-			]
+			],
+			Http::STATUS_FORBIDDEN
 		);
 		$response = $this->getController(false)->enable('abc');
 		$this->assertEquals($expectedResponse, $response);