Add public capabilities API

Signed-off-by: Julius Härtl <jus@bitgrid.net>

core/Controller/OCSController.php

@@ -80,7 +80,8 @@ class OCSController extends \OCP\AppFramework\OCSController {
 	}
 
 	/**
-	 * @NoAdminRequired
+	 * @PublicPage
+	 *
 	 * @return DataResponse
 	 */
 	public function getCapabilities() {
@@ -94,7 +95,11 @@ class OCSController extends \OCP\AppFramework\OCSController {
 			'edition' => '',
 		);
 
-		$result['capabilities'] = $this->capabilitiesManager->getCapabilities();
+		if($this->userSession->isLoggedIn()) {
+			$result['capabilities'] = $this->capabilitiesManager->getCapabilities();
+		} else {
+			$result['capabilities'] = $this->capabilitiesManager->getCapabilities(true);
+		}
 
 		return new DataResponse($result);
 	}

lib/private/CapabilitiesManager.php

@@ -24,6 +24,7 @@ namespace OC;
 
 use OCP\AppFramework\QueryException;
 use OCP\Capabilities\ICapability;
+use OCP\Capabilities\IPublicCapability;
 use OCP\ILogger;
 
 class CapabilitiesManager {
@@ -41,10 +42,11 @@ class CapabilitiesManager {
 	/**
 	 * Get an array of al the capabilities that are registered at this manager
      *
+	 * @param bool $public get public capabilities only
 	 * @throws \InvalidArgumentException
 	 * @return array
 	 */
-	public function getCapabilities() {
+	public function getCapabilities($public = false) {
 		$capabilities = [];
 		foreach($this->capabilities as $capability) {
 			try {
@@ -55,7 +57,9 @@ class CapabilitiesManager {
 			}
 
 			if ($c instanceof ICapability) {
-				$capabilities = array_replace_recursive($capabilities, $c->getCapabilities());
+				if(!$public || ($public && $c instanceof IPublicCapability)) {
+					$capabilities = array_replace_recursive($capabilities, $c->getCapabilities());
+				}
 			} else {
 				throw new \InvalidArgumentException('The given Capability (' . get_class($c) . ') does not implement the ICapability interface');
 			}

lib/public/Capabilities/IPublicCapability.php

@@ -0,0 +1,32 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program 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 program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCP\Capabilities;
+
+/**
+ * @inheritdoc
+ *
+ * @since 13.0.0
+ */
+interface IPublicCapability extends ICapability {}
+