Clear backupcodes reminder if no 2FA is enabled

Fixes #14125

Listen to 2FA disable event. If a provider is disabled for a user. We
check if there are no more providers. If there are no more providers we
Remove the backupcode reminder notification (if still present).

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

5 files changed, 184 insertions, 0 deletions

diff --git a/apps/twofactor_backupcodes/composer/composer/autoload_classmap.php b/apps/twofactor_backupcodes/composer/composer/autoload_classmap.php
index c093a1112a3..2038421a3a2 100644
--- a/apps/twofactor_backupcodes/composer/composer/autoload_classmap.php
+++ b/apps/twofactor_backupcodes/composer/composer/autoload_classmap.php
@@ -17,6 +17,7 @@ return array(
     'OCA\\TwoFactorBackupCodes\\Listener\\ActivityPublisher' => $baseDir . '/../lib/Listener/ActivityPublisher.php',
     'OCA\\TwoFactorBackupCodes\\Listener\\ClearNotifications' => $baseDir . '/../lib/Listener/ClearNotifications.php',
     'OCA\\TwoFactorBackupCodes\\Listener\\IListener' => $baseDir . '/../lib/Listener/IListener.php',
+    'OCA\\TwoFactorBackupCodes\\Listener\\ProviderDisabled' => $baseDir . '/../lib/Listener/ProviderDisabled.php',
     'OCA\\TwoFactorBackupCodes\\Listener\\ProviderEnabled' => $baseDir . '/../lib/Listener/ProviderEnabled.php',
     'OCA\\TwoFactorBackupCodes\\Listener\\RegistryUpdater' => $baseDir . '/../lib/Listener/RegistryUpdater.php',
     'OCA\\TwoFactorBackupCodes\\Migration\\CheckBackupCodes' => $baseDir . '/../lib/Migration/CheckBackupCodes.php',
diff --git a/apps/twofactor_backupcodes/composer/composer/autoload_static.php b/apps/twofactor_backupcodes/composer/composer/autoload_static.php
index baad28d711a..d1f124a407d 100644
--- a/apps/twofactor_backupcodes/composer/composer/autoload_static.php
+++ b/apps/twofactor_backupcodes/composer/composer/autoload_static.php
@@ -32,6 +32,7 @@ class ComposerStaticInitTwoFactorBackupCodes
         'OCA\\TwoFactorBackupCodes\\Listener\\ActivityPublisher' => __DIR__ . '/..' . '/../lib/Listener/ActivityPublisher.php',
         'OCA\\TwoFactorBackupCodes\\Listener\\ClearNotifications' => __DIR__ . '/..' . '/../lib/Listener/ClearNotifications.php',
         'OCA\\TwoFactorBackupCodes\\Listener\\IListener' => __DIR__ . '/..' . '/../lib/Listener/IListener.php',
+        'OCA\\TwoFactorBackupCodes\\Listener\\ProviderDisabled' => __DIR__ . '/..' . '/../lib/Listener/ProviderDisabled.php',
         'OCA\\TwoFactorBackupCodes\\Listener\\ProviderEnabled' => __DIR__ . '/..' . '/../lib/Listener/ProviderEnabled.php',
         'OCA\\TwoFactorBackupCodes\\Listener\\RegistryUpdater' => __DIR__ . '/..' . '/../lib/Listener/RegistryUpdater.php',
         'OCA\\TwoFactorBackupCodes\\Migration\\CheckBackupCodes' => __DIR__ . '/..' . '/../lib/Migration/CheckBackupCodes.php',
diff --git a/apps/twofactor_backupcodes/lib/AppInfo/Application.php b/apps/twofactor_backupcodes/lib/AppInfo/Application.php
index f5d0139dbd9..fc6c94d5b7a 100644
--- a/apps/twofactor_backupcodes/lib/AppInfo/Application.php
+++ b/apps/twofactor_backupcodes/lib/AppInfo/Application.php
@@ -30,6 +30,7 @@ use OCA\TwoFactorBackupCodes\Event\CodesGenerated;
 use OCA\TwoFactorBackupCodes\Listener\ActivityPublisher;
 use OCA\TwoFactorBackupCodes\Listener\ClearNotifications;
 use OCA\TwoFactorBackupCodes\Listener\IListener;
+use OCA\TwoFactorBackupCodes\Listener\ProviderDisabled;
 use OCA\TwoFactorBackupCodes\Listener\ProviderEnabled;
 use OCA\TwoFactorBackupCodes\Listener\RegistryUpdater;
 use OCA\TwoFactorBackupCodes\Notifications\Notifier;
@@ -81,6 +82,12 @@ class Application extends App {
 			$listener = $container->query(ProviderEnabled::class);
 			$listener->handle($event);
 		});
+
+		$eventDispatcher->addListener(IRegistry::EVENT_PROVIDER_DISABLED, function(RegistryEvent $event) use ($container) {
+			/** @var IListener $listener */
+			$listener = $container->query(ProviderDisabled::class);
+			$listener->handle($event);
+		});
 	}
 
 	public function registerNotification() {
diff --git a/apps/twofactor_backupcodes/lib/Listener/ProviderDisabled.php b/apps/twofactor_backupcodes/lib/Listener/ProviderDisabled.php
new file mode 100644
index 00000000000..835eb0394f9
--- /dev/null
+++ b/apps/twofactor_backupcodes/lib/Listener/ProviderDisabled.php
@@ -0,0 +1,65 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @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\TwoFactorBackupCodes\Listener;
+
+use OCA\TwoFactorBackupCodes\BackgroundJob\RememberBackupCodesJob;
+use OCP\Authentication\TwoFactorAuth\IRegistry;
+use OCP\Authentication\TwoFactorAuth\RegistryEvent;
+use OCP\BackgroundJob\IJobList;
+use Symfony\Component\EventDispatcher\Event;
+
+class ProviderDisabled implements IListener {
+
+	/** @var IRegistry */
+	private $registry;
+
+	/** @var IJobList */
+	private $jobList;
+
+	public function __construct(IRegistry $registry,
+								IJobList $jobList) {
+		$this->registry = $registry;
+		$this->jobList = $jobList;
+	}
+
+	public function handle(Event $event) {
+		if (!($event instanceof RegistryEvent)) {
+			return;
+		}
+
+		$providers = $this->registry->getProviderStates($event->getUser());
+
+		// Loop over all providers. If all are disabled we remove the job
+		$state = array_reduce($providers, function (bool $carry, bool $enabled) {
+			return $carry || $enabled;
+		}, false);
+
+		if ($state === false) {
+			$this->jobList->remove(RememberBackupCodesJob::class, ['uid' => $event->getUser()->getUID()]);
+		}
+	}
+
+}
diff --git a/apps/twofactor_backupcodes/tests/Unit/Listener/ProviderDisabledTest.php b/apps/twofactor_backupcodes/tests/Unit/Listener/ProviderDisabledTest.php
new file mode 100644
index 00000000000..1bd5a7ccab0
--- /dev/null
+++ b/apps/twofactor_backupcodes/tests/Unit/Listener/ProviderDisabledTest.php
@@ -0,0 +1,110 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @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\TwoFactorBackupCodes\Tests\Unit\Listener;
+
+use OCA\TwoFactorBackupCodes\BackgroundJob\RememberBackupCodesJob;
+use OCA\TwoFactorBackupCodes\Listener\ProviderDisabled;
+use OCP\Authentication\TwoFactorAuth\IRegistry;
+use OCP\Authentication\TwoFactorAuth\RegistryEvent;
+use OCP\BackgroundJob\IJobList;
+use OCP\IUser;
+use Symfony\Component\EventDispatcher\Event;
+use Test\TestCase;
+
+class ProviderDisabledTest extends TestCase {
+
+	/** @var IRegistry|\PHPUnit\Framework\MockObject\MockObject */
+	private $registy;
+
+	/** @var IJobList|\PHPUnit\Framework\MockObject\MockObject */
+	private $jobList;
+
+	/** @var ProviderDisabled */
+	private $listener;
+
+	protected function setUp() {
+		parent::setUp();
+
+		$this->registy = $this->createMock(IRegistry::class);
+		$this->jobList = $this->createMock(IJobList::class);
+
+		$this->listener = new ProviderDisabled($this->registy, $this->jobList);
+	}
+
+	public function testHandleGenericEvent() {
+		$event = $this->createMock(Event::class);
+		$this->jobList->expects($this->never())
+			->method($this->anything());
+
+		$this->listener->handle($event);
+	}
+
+	public function testHandleStillActiveProvider() {
+		$user = $this->createMock(IUser::class);
+		$user->method('getUID')
+			->willReturn('myUID');
+		$event = $this->createMock(RegistryEvent::class);
+		$event->method('getUser')
+			->willReturn($user);
+
+		$this->registy->method('getProviderStates')
+			->with($user)
+			->willReturn([
+				'backup_codes' => false,
+				'foo' => true,
+			]);
+
+		$this->jobList->expects($this->never())
+			->method($this->anything());
+
+		$this->listener->handle($event);
+	}
+
+	public function testHandleNoActiveProvider() {
+		$user = $this->createMock(IUser::class);
+		$user->method('getUID')
+			->willReturn('myUID');
+		$event = $this->createMock(RegistryEvent::class);
+		$event->method('getUser')
+			->willReturn($user);
+
+		$this->registy->method('getProviderStates')
+			->with($user)
+			->willReturn([
+				'backup_codes' => false,
+				'foo' => false,
+			]);
+
+		$this->jobList->expects($this->once())
+			->method('remove')
+			->with(
+				$this->equalTo(RememberBackupCodesJob::class),
+				$this->equalTo(['uid' => 'myUID'])
+			);
+
+		$this->listener->handle($event);
+	}
+}