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- <?php
-
- declare(strict_types=1);
-
- /**
- * @copyright 2019 Christoph Wurst <christoph@winzerhof-wurst.at>
- *
- * @author 2019 Christoph Wurst <christoph@winzerhof-wurst.at>
- *
- * @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 OC\EventDispatcher;
-
- use OCP\AppFramework\QueryException;
- use OCP\EventDispatcher\Event;
- use OCP\EventDispatcher\IEventListener;
- use OCP\IContainer;
- use OCP\ILogger;
-
- /**
- * Lazy service event listener
- *
- * Makes it possible to lazy-route a dispatched event to a service instance
- * created by the service container
- */
- final class ServiceEventListener {
-
- /** @var IContainer */
- private $container;
-
- /** @var string */
- private $class;
-
- /** @var ILogger */
- private $logger;
-
- /** @var null|IEventListener */
- private $service;
-
- public function __construct(IContainer $container,
- string $class,
- ILogger $logger) {
- $this->container = $container;
- $this->class = $class;
- $this->logger = $logger;
- }
-
- public function __invoke(Event $event) {
- if ($this->service === null) {
- try {
- $this->service = $this->container->query($this->class);
- } catch (QueryException $e) {
- $this->logger->logException($e, [
- 'level' => ILogger::ERROR,
- 'message' => "Could not load event listener service " . $this->class,
- ]);
- return;
- }
- }
-
- $this->service->handle($event);
- }
-
- }
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