Add circle service abstraction

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

lib/Service/CirclesService.php

@@ -0,0 +1,62 @@
+<?php
+/**
+ * @copyright Copyright (c) 2020 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/>.
+ *
+ */
+
+declare(strict_types=1);
+
+
+namespace OCA\Deck\Service;
+
+use OCP\App\IAppManager;
+
+/**
+ * Wrapper around circles app API since it is not in a public namespace so we need to make sure that
+ * having the app disabled is properly handled
+ */
+class CirclesService {
+	private $circlesEnabled;
+
+	public function __construct(IAppManager $appManager) {
+		$this->circlesEnabled = $appManager->isEnabledForUser('circles');
+	}
+
+	public function getCircle($circleId) {
+		if (!$this->circlesEnabled) {
+			return null;
+		}
+
+		return \OCA\Circles\Api\v1\Circles::detailsCircle($circleId, true);
+	}
+
+	public function isUserInCircle($circleId, $userId): bool {
+		if (!$this->circlesEnabled) {
+			return false;
+		}
+
+		try {
+			\OCA\Circles\Api\v1\Circles::getMember($circleId, $userId, 1, true);
+			return true;
+		} catch (\Exception $e) {
+		}
+		return false;
+	}
+}