Delete Forms for deleted User

Signed-off-by: Jonas Rittershofer <jotoeri@users.noreply.github.com>

lib/AppInfo/Application.php

@@ -28,7 +28,10 @@ declare(strict_types=1);
 
 namespace OCA\Forms\AppInfo;
 
+use OCA\Forms\Listener\UserDeletedListener;
 use OCP\AppFramework\App;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\User\Events\UserDeletedEvent;
 
 include_once __DIR__ . '/../../vendor/autoload.php';
 
@@ -41,5 +44,8 @@ class Application extends App {
 	 */
 	public function __construct(array $urlParams = []) {
 		parent::__construct(self::APP_ID, $urlParams);
+
+		$eventDispatcher = $this->getContainer()->query(IEventDispatcher::class);
+		$eventDispatcher->addServiceListener(UserDeletedEvent::class, UserDeletedListener::class);
 	}
 }

lib/BackgroundJob/UserDeletedJob.php

+<?php
+/**
+ * @copyright Copyright (c) 2021 Jonas Rittershofer <jotoeri@users.noreply.github.com>
+ *
+ * @author Jonas Rittershofer <jotoeri@users.noreply.github.com>
+ *
+ * @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\Forms\BackgroundJob;
+
+use OCA\Forms\Db\FormMapper;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\BackgroundJob\QueuedJob;
+use OCP\ILogger;
+
+class UserDeletedJob extends QueuedJob {
+
+	/** @var FormMapper */
+	private $formMapper;
+
+	/** @var ILogger */
+	private $logger;
+
+	public function __construct(FormMapper $formMapper,
+								ITimeFactory $time,
+								ILogger $logger) {
+		parent::__construct($time);
+
+		$this->formMapper = $formMapper;
+		$this->logger = $logger;
+	}
+
+	public function run($arguments) {
+		$ownerId = $arguments['owner_id'];
+		$this->logger->info('Deleting forms for deleted user {user}', [
+			'user' => $ownerId
+		]);
+
+		$forms = $this->formMapper->findAllByOwnerId($ownerId);
+		foreach ($forms as $form) {
+			$this->formMapper->deleteForm($form);
+		}
+	}
+}

lib/Listener/UserDeletedListener.php

+<?php
+/**
+ * @copyright Copyright (c) 2021 Jonas Rittershofer <jotoeri@users.noreply.github.com>
+ *
+ * @author Jonas Rittershofer <jotoeri@users.noreply.github.com>
+ *
+ * @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\Forms\Listener;
+
+use OCA\Forms\BackgroundJob\UserDeletedJob;
+use OCP\BackgroundJob\IJobList;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\ILogger;
+use OCP\User\Events\UserDeletedEvent;
+
+class UserDeletedListener implements IEventListener {
+
+	/** @var IJobList */
+	private $jobList;
+
+	/** @var ILogger */
+	private $logger;
+
+	public function __construct(IJobList $jobList,
+								ILogger $logger) {
+		$this->jobList = $jobList;
+		$this->logger = $logger;
+	}
+
+	public function handle(Event $event): void {
+		if (!($event instanceof UserDeletedEvent)) {
+			return;
+		}
+
+		// Set a Cron-Job to delete the Users Forms.
+		$this->jobList->add(UserDeletedJob::class, ['owner_id' => $event->getUser()->getUID()]);
+	}
+}

tests/Unit/BackgroundJob/UserDeletedJobTest.php

+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2021 Jonas Rittershofer <jotoeri@users.noreply.github.com>
+ *
+ * @author Jonas Rittershofer <jotoeri@users.noreply.github.com>
+ *
+ * @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\Forms\Tests\Unit\BackgroundJob;
+
+use OCA\Forms\BackgroundJob\UserDeletedJob;
+
+use OCA\Forms\Db\Form;
+use OCA\Forms\Db\FormMapper;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\ILogger;
+use PHPUnit\Framework\MockObject\MockObject;
+use Test\TestCase;
+
+class UserDeletedJobTest extends TestCase {
+	/** @var UserDeletedJob */
+	private $userDeletedJob;
+
+	/** @var FormMapper|MockObject */
+	private $formMapper;
+
+	/** @var ILogger|MockObject */
+	private $logger;
+
+	public function setUp(): void {
+		$this->formMapper = $this->createMock(FormMapper::class);
+		$time = $this->createMock(ITimeFactory::class);
+		$this->logger = $this->createMock(ILogger::class);
+		$this->userDeletedJob = new UserDeletedJob($this->formMapper, $time, $this->logger);
+	}
+
+	public function testHandle() {
+		$form = $this->createMock(Form::class);
+		$this->formMapper->expects($this->once())
+			->method('findAllByOwnerId')
+			->willReturn([$form, $form, $form]);
+		$this->formMapper->expects($this->exactly(3))
+			->method('deleteForm')
+			->with($form);
+
+		$this->userDeletedJob->run(['owner_id' => 'someUser']);
+	}
+}

tests/Unit/Listener/UserDeletedListenerTest.php

+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2021 Jonas Rittershofer <jotoeri@users.noreply.github.com>
+ *
+ * @author Jonas Rittershofer <jotoeri@users.noreply.github.com>
+ *
+ * @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\Forms\Tests\Unit\Listener;
+
+use OCA\Forms\Listener\UserDeletedListener;
+
+use OCA\Forms\BackgroundJob\UserDeletedJob;
+use OCP\BackgroundJob\IJobList;
+use OCP\ILogger;
+use OCP\IUser;
+use OCP\User\Events\UserCreatedEvent;
+use OCP\User\Events\UserDeletedEvent;
+use PHPUnit\Framework\MockObject\MockObject;
+use Test\TestCase;
+
+class UserDeletedListenerTest extends TestCase {
+	/** @var UserDeletedListener */
+	private $userDeletedListener;
+
+	/** @var IJobList|MockObject */
+	private $jobList;
+
+	/** @var ILogger|MockObject */
+	private $logger;
+
+	public function setUp(): void {
+		$this->jobList = $this->createMock(IJobList::class);
+		$this->logger = $this->createMock(ILogger::class);
+		$this->userDeletedListener = new UserDeletedListener($this->jobList, $this->logger);
+	}
+
+	public function testHandle() {
+		$user = $this->createMock(IUser::class);
+		$user->expects($this->once())
+			->method('getUID')
+			->willReturn('someUser');
+		$event = $this->createMock(UserDeletedEvent::class);
+		$event->expects($this->once())
+			->method('getUser')
+			->willReturn($user);
+
+		$this->jobList->expects($this->once())
+			->method('add')
+			->with(UserDeletedJob::class, ['owner_id' => 'someUser']);
+
+		$this->userDeletedListener->handle($event);
+	}
+
+	public function testWrongEvent() {
+		$event = $this->createMock(UserCreatedEvent::class);
+		$this->jobList->expects($this->never())
+			->method('add');
+
+		$this->userDeletedListener->handle($event);
+	}
+}