Add notifications for users that are added to the group

Signed-off-by: Joas Schilling <coding@schilljs.com>

apps/files_sharing/lib/AppInfo/Application.php

@@ -43,6 +43,7 @@ use OCP\AppFramework\Utility\IControllerMethodReflector;
 use OCP\Defaults;
 use OCP\Federation\ICloudIdManager;
 use \OCP\IContainer;
+use OCP\IGroup;
 use OCP\IServerContainer;
 use OCA\Files_Sharing\Capabilities;
 use OCA\Files_Sharing\External\Manager;
@@ -188,5 +189,10 @@ class Application extends App {
 			$listener = $this->getContainer()->query(Listener::class);
 			$listener->shareNotification($event);
 		});
+		$dispatcher->addListener(IGroup::class . '::postAddUser', function(GenericEvent $event) {
+			/** @var Listener $listener */
+			$listener = $this->getContainer()->query(Listener::class);
+			$listener->userAddedToGroup($event);
+		});
 	}
 }

apps/files_sharing/lib/Notification/Listener.php

@@ -25,24 +25,31 @@ declare(strict_types=1);
 namespace OCA\Files_Sharing\Notification;
 
 use OC\Share\Share;
+use OCP\IGroup;
 use OCP\IGroupManager;
-use OCP\Notification\IManager;
+use OCP\IUser;
+use OCP\Notification\IManager as INotificationManager;
 use OCP\Notification\INotification;
+use OCP\Share\IManager as IShareManager;
 use OCP\Share\IShare;
 use Symfony\Component\EventDispatcher\GenericEvent;
 
 class Listener {
 
-	/** @var IManager */
+	/** @var INotificationManager */
 	protected $notificationManager;
+	/** @var IShareManager */
+	protected $shareManager;
 	/** @var IGroupManager */
 	protected $groupManager;
 
 	public function __construct(
-		IManager $notificationManager,
+		INotificationManager $notificationManager,
+		IShareManager $shareManager,
 		IGroupManager $groupManager
 	) {
 		$this->notificationManager = $notificationManager;
+		$this->shareManager = $shareManager;
 		$this->groupManager = $groupManager;
 	}
 
@@ -74,6 +81,41 @@ class Listener {
 		}
 	}
 
+	/**
+	 * @param GenericEvent $event
+	 */
+	public function userAddedToGroup(GenericEvent $event): void {
+		/** @var IGroup $group */
+		$group = $event->getSubject();
+		/** @var IUser $user */
+		$user = $event->getArgument('user');
+
+		$offset = 0;
+		while (true) {
+			$shares = $this->shareManager->getSharedWith($user->getUID(), IShare::TYPE_GROUP, null, 50, $offset);
+			if (empty($shares)) {
+				break;
+			}
+
+			foreach ($shares as $share) {
+				if ($share->getSharedWith() !== $group->getGID()) {
+					continue;
+				}
+
+				if ($user->getUID() === $share->getShareOwner() ||
+					$user->getUID() === $share->getSharedBy()) {
+					continue;
+				}
+
+				$notification = $this->instantiateNotification($share);
+				$notification->setSubject('incoming_group_share')
+					->setUser($user->getUID());
+				$this->notificationManager->notify($notification);
+			}
+			$offset += 50;
+		}
+	}
+
 	/**
 	 * @param IShare $share
 	 * @return INotification