add restful API

appinfo/routes.php

@@ -15,4 +15,8 @@
 		['name' => 'recommendation#index', 'url' => '/api/recommendations', 'verb' => 'GET'],
 		['name' => 'recommendation#always', 'url' => '/api/recommendations/always', 'verb' => 'GET'],
 	],
+	'ocs' => [
+		['name' => 'recommendation_api#index', 'url' => '/api/v1/recommendations', 'verb' => 'GET'],
+		['name' => 'recommendation_api#always', 'url' => '/api/v1/recommendations/always', 'verb' => 'GET'],
+	],
 ];

lib/Controller/RecommendationApiController.php

@@ -0,0 +1,91 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ *
+ * @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\Recommendations\Controller;
+
+use OCA\Recommendations\AppInfo\Application;
+use OCA\Recommendations\Service\RecommendationService;
+use OCP\AppFramework\OCSController;
+use OCP\AppFramework\Http\DataResponse;
+use OCP\IConfig;
+use OCP\IRequest;
+use OCP\IUserManager;
+
+class RecommendationApiController extends OCSController {
+
+	/** @var IConfig */
+	private $config;
+
+	/** @var IUserManager */
+	private $userManager;
+
+	/** @var RecommendationService */
+	private $service;
+
+	public function __construct($appName, IRequest $request, IConfig $config,
+								IUserManager $userManager,
+								RecommendationService $service, $userId) {
+		parent::__construct($appName, $request, 'GET');
+		$this->config = $config;
+		$this->service = $service;
+		$this->userManager = $userManager;
+		$this->userId = $userId;
+	}
+
+	/**
+	 * @CORS
+	 * @NoCSRFRequired
+	 * @NoAdminRequired
+	 */
+	public function index(): DataResponse {
+		$user = $this->userManager->get($this->userId);
+
+		$response = [];
+		$response['enabled'] = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'enabled', 'true') === 'true';
+
+		if ($response['enabled']) {
+			$response['recommendations'] = $this->service->getRecommendations($user);
+		}
+
+		return new DataResponse(
+			$response
+		);
+	}
+
+	/**
+	 * @CORS
+	 * @NoCSRFRequired
+	 * @NoAdminRequired
+	 */
+	public function always(): DataResponse {
+		$user = $this->userManager->get($this->userId);
+
+		$response = [
+			'enabled' => $this->config->getUserValue($user->getUID(), Application::APP_ID, 'enabled', 'true') === 'true',
+			'recommendations' => $this->service->getRecommendations($user),
+		];
+
+		return new DataResponse(
+			$response
+		);
+	}
+}