Expose app version through capabilities

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

lib/Capabilities.php

@@ -0,0 +1,44 @@
+<?php
+/**
+ * @copyright Copyright (c) 2019 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 OCA\Deck;
+
+
+use OCP\Capabilities\ICapability;
+
+class Capabilities  implements ICapability {
+
+	/**
+	 * Function an app uses to return the capabilities
+	 *
+	 * @return array Array containing the apps capabilities
+	 * @since 8.2.0
+	 */
+	public function getCapabilities() {
+		return [
+			'deck' => [
+				'version' => \OC::$server->getAppManager()->getAppVersion('deck')
+			]
+		];
+	}
+}