refactor: Port to newer system tag events

lib/Listener/TagListener.php

@@ -8,43 +8,47 @@
 
 use OCP\EventDispatcher\Event;
 use OCP\EventDispatcher\IEventListener;
-use OCP\Files\Config\ICachedMountInfo;
 use OCP\Files\Config\IUserMountCache;
 use OCP\Files\IRootFolder;
 use OCP\ICache;
 use OCP\ICacheFactory;
-use OCP\SystemTag\MapperEvent;
+use OCP\SystemTag\TagAssignedEvent;
+use OCP\SystemTag\TagUnassignedEvent;
+use Override;
 
 /**
- * @template-implements IEventListener<MapperEvent>
+ * @template-implements IEventListener<TagAssignedEvent|TagUnassignedEvent>
  */
 class TagListener implements IEventListener {
 	private readonly ICache $tagCountsCache;
-	private readonly IRootFolder $rootFolder;
-	private readonly IUserMountCache $userMountCache;
 
-	public function __construct(ICacheFactory $cacheFactory, IRootFolder $rootFolder, IUserMountCache $userMountCache) {
+	public function __construct(
+		ICacheFactory $cacheFactory,
+		private readonly IRootFolder $rootFolder,
+		private readonly IUserMountCache $userMountCache,
+	) {
 		$this->tagCountsCache = $cacheFactory->createLocal('photos:tag-counts');
-		$this->rootFolder = $rootFolder;
-		$this->userMountCache = $userMountCache;
 	}
 
-	/**
-	 * @inheritDoc
-	 */
+	#[Override]
 	public function handle(Event $event): void {
-		if ($event instanceof MapperEvent) {
-			if ($event->getObjectType() !== 'files') {
-				return;
-			}
-			$node = $this->rootFolder->getFirstNodeById((int)$event->getObjectId());
+		if (!$event instanceof TagAssignedEvent && !$event instanceof TagUnassignedEvent) {
+			return;
+		}
+
+		if ($event->getObjectType() !== 'files') {
+			return;
+		}
+
+		foreach ($event->getObjectIds() as $objectId) {
+			$node = $this->rootFolder->getFirstNodeById((int)$objectId);
 			if (!$node) {
-				return;
+				continue;
 			}
+
 			$mounts = $this->userMountCache->getMountsForRootId($node->getMountPoint()->getStorageRootId());
-			$userIds = array_map(static fn (ICachedMountInfo $mount) => $mount->getUser()->getUID(), $mounts);
-			foreach ($userIds as $userId) {
-				$this->tagCountsCache->remove($userId);
+			foreach ($mounts as $mount) {
+				$this->tagCountsCache->remove($mount->getUser()->getUID());
 			}
 		}
 	}