Only show undelete capability if files_trashbin is enabled

Fixes the OCS capability API at /ocs/v1.php/cloud/capabilities

apps/files/lib/capabilities.php

@@ -15,7 +15,6 @@ class Capabilities {
 			'capabilities' => array(
 				'files' => array(
 					'bigfilechunking' => true,
-					'undelete' => true,
 					),
 				),
 			));

apps/files_trashbin/appinfo/routes.php

@@ -13,3 +13,7 @@ $this->create('files_trashbin_ajax_list', 'ajax/list.php')
 	->actionInclude('files_trashbin/ajax/list.php');
 $this->create('files_trashbin_ajax_undelete', 'ajax/undelete.php')
 	->actionInclude('files_trashbin/ajax/undelete.php');
+
+
+// Register with the capabilities API
+\OC_API::register('get', '/cloud/capabilities', array('OCA\Files_Trashbin\Capabilities', 'getCapabilities'), 'files_trashbin', \OC_API::USER_AUTH);

apps/files_trashbin/lib/capabilities.php

@@ -0,0 +1,32 @@
+<?php
+/**
+ * Copyright (c) Lukas Reschke <lukas@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+ 
+namespace OCA\Files_Trashbin;
+
+
+/**
+ * Class Capabilities
+ *
+ * @package OCA\Files_Trashbin
+ */
+class Capabilities {
+
+	/**
+	 * @return \OC_OCS_Result
+	 */
+	public static function getCapabilities() {
+		return new \OC_OCS_Result(array(
+			'capabilities' => array(
+				'files' => array(
+					'undelete' => true,
+					),
+				),
+			));
+	}
+	
+}