refactor: Add new modern events for system tag lifecycle

The old one was deprecated in 22.0.0 but didn't had a replacement.

Signed-off-by: Carl Schwan <carlschwan@kde.org>

apps/admin_audit/composer/composer/autoload_classmap.php

@@ -10,7 +10,6 @@ return array(
     'OCA\\AdminAudit\\Actions\\Action' => $baseDir . '/../lib/Actions/Action.php',
     'OCA\\AdminAudit\\Actions\\Files' => $baseDir . '/../lib/Actions/Files.php',
     'OCA\\AdminAudit\\Actions\\Sharing' => $baseDir . '/../lib/Actions/Sharing.php',
-    'OCA\\AdminAudit\\Actions\\TagManagement' => $baseDir . '/../lib/Actions/TagManagement.php',
     'OCA\\AdminAudit\\Actions\\Trashbin' => $baseDir . '/../lib/Actions/Trashbin.php',
     'OCA\\AdminAudit\\Actions\\Versions' => $baseDir . '/../lib/Actions/Versions.php',
     'OCA\\AdminAudit\\AppInfo\\Application' => $baseDir . '/../lib/AppInfo/Application.php',
@@ -26,5 +25,6 @@ return array(
     'OCA\\AdminAudit\\Listener\\GroupManagementEventListener' => $baseDir . '/../lib/Listener/GroupManagementEventListener.php',
     'OCA\\AdminAudit\\Listener\\SecurityEventListener' => $baseDir . '/../lib/Listener/SecurityEventListener.php',
     'OCA\\AdminAudit\\Listener\\SharingEventListener' => $baseDir . '/../lib/Listener/SharingEventListener.php',
+    'OCA\\AdminAudit\\Listener\\TagEventListener' => $baseDir . '/../lib/Listener/TagEventListener.php',
     'OCA\\AdminAudit\\Listener\\UserManagementEventListener' => $baseDir . '/../lib/Listener/UserManagementEventListener.php',
 );

apps/admin_audit/composer/composer/autoload_static.php

@@ -25,7 +25,6 @@ class ComposerStaticInitAdminAudit
         'OCA\\AdminAudit\\Actions\\Action' => __DIR__ . '/..' . '/../lib/Actions/Action.php',
         'OCA\\AdminAudit\\Actions\\Files' => __DIR__ . '/..' . '/../lib/Actions/Files.php',
         'OCA\\AdminAudit\\Actions\\Sharing' => __DIR__ . '/..' . '/../lib/Actions/Sharing.php',
-        'OCA\\AdminAudit\\Actions\\TagManagement' => __DIR__ . '/..' . '/../lib/Actions/TagManagement.php',
         'OCA\\AdminAudit\\Actions\\Trashbin' => __DIR__ . '/..' . '/../lib/Actions/Trashbin.php',
         'OCA\\AdminAudit\\Actions\\Versions' => __DIR__ . '/..' . '/../lib/Actions/Versions.php',
         'OCA\\AdminAudit\\AppInfo\\Application' => __DIR__ . '/..' . '/../lib/AppInfo/Application.php',
@@ -41,6 +40,7 @@ class ComposerStaticInitAdminAudit
         'OCA\\AdminAudit\\Listener\\GroupManagementEventListener' => __DIR__ . '/..' . '/../lib/Listener/GroupManagementEventListener.php',
         'OCA\\AdminAudit\\Listener\\SecurityEventListener' => __DIR__ . '/..' . '/../lib/Listener/SecurityEventListener.php',
         'OCA\\AdminAudit\\Listener\\SharingEventListener' => __DIR__ . '/..' . '/../lib/Listener/SharingEventListener.php',
+        'OCA\\AdminAudit\\Listener\\TagEventListener' => __DIR__ . '/..' . '/../lib/Listener/TagEventListener.php',
         'OCA\\AdminAudit\\Listener\\UserManagementEventListener' => __DIR__ . '/..' . '/../lib/Listener/UserManagementEventListener.php',
     );
 

apps/admin_audit/lib/Actions/TagManagement.php

@@ -1,28 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-/*!
- * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
-
-namespace OCA\AdminAudit\Actions;
-
-use OCP\SystemTag\ISystemTag;
-
-class TagManagement extends Action {
-	/**
-	 * @param ISystemTag $tag newly created tag
-	 */
-	public function createTag(ISystemTag $tag): void {
-		$this->log('System tag "%s" (%s, %s) created',
-			[
-				'name' => $tag->getName(),
-				'visibility' => $tag->isUserVisible() ? 'visible' : 'invisible',
-				'assignable' => $tag->isUserAssignable() ? 'user assignable' : 'system only',
-			],
-			['name', 'visibility', 'assignable']
-		);
-	}
-}

apps/admin_audit/lib/AppInfo/Application.php

@@ -13,7 +13,6 @@ use OCA\AdminAudit\Actions\Auth;
 use OCA\AdminAudit\Actions\Console;
 use OCA\AdminAudit\Actions\Files;
 use OCA\AdminAudit\Actions\Sharing;
-use OCA\AdminAudit\Actions\TagManagement;
 use OCA\AdminAudit\Actions\Trashbin;
 use OCA\AdminAudit\Actions\Versions;
 use OCA\AdminAudit\AuditLogger;
@@ -27,6 +26,7 @@ use OCA\AdminAudit\Listener\FileEventListener;
 use OCA\AdminAudit\Listener\GroupManagementEventListener;
 use OCA\AdminAudit\Listener\SecurityEventListener;
 use OCA\AdminAudit\Listener\SharingEventListener;
+use OCA\AdminAudit\Listener\TagEventListener;
 use OCA\AdminAudit\Listener\UserManagementEventListener;
 use OCA\Files_Versions\Events\VersionRestoredEvent;
 use OCP\App\Events\AppDisableEvent;
@@ -58,7 +58,7 @@ use OCP\Preview\BeforePreviewFetchedEvent;
 use OCP\Share;
 use OCP\Share\Events\ShareCreatedEvent;
 use OCP\Share\Events\ShareDeletedEvent;
-use OCP\SystemTag\ManagerEvent;
+use OCP\SystemTag\Events\TagCreatedEvent;
 use OCP\User\Events\BeforeUserLoggedInEvent;
 use OCP\User\Events\BeforeUserLoggedOutEvent;
 use OCP\User\Events\PasswordUpdatedEvent;
@@ -127,6 +127,9 @@ class Application extends App implements IBootstrap {
 		// Cache events
 		$context->registerEventListener(CacheEntryInsertedEvent::class, CacheEventListener::class);
 		$context->registerEventListener(CacheEntryRemovedEvent::class, CacheEventListener::class);
+
+		// System tag event
+		$context->registerEventListener(TagCreatedEvent::class, TagEventListener::class);
 	}
 
 	#[\Override]
@@ -151,7 +154,6 @@ class Application extends App implements IBootstrap {
 		$this->fileHooks($logger, $eventDispatcher);
 		$this->trashbinHooks($logger);
 		$this->versionsHooks($logger);
-		$this->tagHooks($logger, $eventDispatcher);
 	}
 
 	private function sharingLegacyHooks(IAuditLogger $logger): void {
@@ -163,14 +165,6 @@ class Application extends App implements IBootstrap {
 		Util::connectHook(Share::class, 'share_link_access', $shareActions, 'shareAccessed');
 	}
 
-	private function tagHooks(IAuditLogger $logger,
-		IEventDispatcher $eventDispatcher): void {
-		$eventDispatcher->addListener(ManagerEvent::EVENT_CREATE, function (ManagerEvent $event) use ($logger): void {
-			$tagActions = new TagManagement($logger);
-			$tagActions->createTag($event->getTag());
-		});
-	}
-
 	private function fileHooks(IAuditLogger $logger, IEventDispatcher $eventDispatcher): void {
 		$fileActions = new Files($logger);
 

apps/admin_audit/lib/Listener/TagEventListener.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH
+ * SPDX-FileContributor: Carl Schwan
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\AdminAudit\Listener;
+
+use OCA\AdminAudit\Actions\Action;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\SystemTag\Events\TagCreatedEvent;
+use Override;
+
+/**
+ * @template-implements IEventListener<TagCreatedEvent>
+ */
+class TagEventListener extends Action implements IEventListener {
+	#[Override]
+	public function handle(Event $event): void {
+		if (!$event instanceof TagCreatedEvent) {
+			return;
+		}
+
+		$tag = $event->getTag();
+
+		$this->log('System tag "%s" (%s, %s) created',
+			[
+				'name' => $tag->getName(),
+				'visibility' => $tag->isUserVisible() ? 'visible' : 'invisible',
+				'assignable' => $tag->isUserAssignable() ? 'user assignable' : 'system only',
+			],
+			['name', 'visibility', 'assignable']
+		);
+	}
+}

apps/systemtags/composer/composer/autoload_classmap.php

@@ -7,9 +7,9 @@ $baseDir = $vendorDir;
 
 return array(
     'Composer\\InstalledVersions' => $vendorDir . '/composer/InstalledVersions.php',
-    'OCA\\SystemTags\\Activity\\Listener' => $baseDir . '/../lib/Activity/Listener.php',
     'OCA\\SystemTags\\Activity\\Provider' => $baseDir . '/../lib/Activity/Provider.php',
     'OCA\\SystemTags\\Activity\\Setting' => $baseDir . '/../lib/Activity/Setting.php',
+    'OCA\\SystemTags\\Activity\\TagListener' => $baseDir . '/../lib/Activity/TagListener.php',
     'OCA\\SystemTags\\AppInfo\\Application' => $baseDir . '/../lib/AppInfo/Application.php',
     'OCA\\SystemTags\\Capabilities' => $baseDir . '/../lib/Capabilities.php',
     'OCA\\SystemTags\\Command\\Files\\Add' => $baseDir . '/../lib/Command/Files/Add.php',

apps/systemtags/composer/composer/autoload_static.php

@@ -22,9 +22,9 @@ class ComposerStaticInitSystemTags
 
     public static $classMap = array (
         'Composer\\InstalledVersions' => __DIR__ . '/..' . '/composer/InstalledVersions.php',
-        'OCA\\SystemTags\\Activity\\Listener' => __DIR__ . '/..' . '/../lib/Activity/Listener.php',
         'OCA\\SystemTags\\Activity\\Provider' => __DIR__ . '/..' . '/../lib/Activity/Provider.php',
         'OCA\\SystemTags\\Activity\\Setting' => __DIR__ . '/..' . '/../lib/Activity/Setting.php',
+        'OCA\\SystemTags\\Activity\\TagListener' => __DIR__ . '/..' . '/../lib/Activity/TagListener.php',
         'OCA\\SystemTags\\AppInfo\\Application' => __DIR__ . '/..' . '/../lib/AppInfo/Application.php',
         'OCA\\SystemTags\\Capabilities' => __DIR__ . '/..' . '/../lib/Capabilities.php',
         'OCA\\SystemTags\\Command\\Files\\Add' => __DIR__ . '/..' . '/../lib/Command/Files/Add.php',

apps/systemtags/lib/Activity/Listener.php

@@ -1,222 +0,0 @@
-<?php
-
-/**
- * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
- * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-namespace OCA\SystemTags\Activity;
-
-use OCP\Activity\IManager;
-use OCP\App\IAppManager;
-use OCP\Files\Config\IMountProviderCollection;
-use OCP\Files\IRootFolder;
-use OCP\Files\Node;
-use OCP\IConfig;
-use OCP\IGroup;
-use OCP\IGroupManager;
-use OCP\IUser;
-use OCP\IUserSession;
-use OCP\Share\IShareHelper;
-use OCP\SystemTag\ISystemTag;
-use OCP\SystemTag\ISystemTagManager;
-use OCP\SystemTag\ManagerEvent;
-use OCP\SystemTag\MapperEvent;
-use OCP\SystemTag\TagNotFoundException;
-
-class Listener {
-	/**
-	 * Listener constructor.
-	 *
-	 * @param IGroupManager $groupManager
-	 * @param IManager $activityManager
-	 * @param IUserSession $session
-	 * @param IConfig $config
-	 * @param ISystemTagManager $tagManager
-	 * @param IAppManager $appManager
-	 * @param IMountProviderCollection $mountCollection
-	 * @param IRootFolder $rootFolder
-	 * @param IShareHelper $shareHelper
-	 */
-	public function __construct(
-		protected IGroupManager $groupManager,
-		protected IManager $activityManager,
-		protected IUserSession $session,
-		protected IConfig $config,
-		protected ISystemTagManager $tagManager,
-		protected IAppManager $appManager,
-		protected IMountProviderCollection $mountCollection,
-		protected IRootFolder $rootFolder,
-		protected IShareHelper $shareHelper,
-	) {
-	}
-
-	/**
-	 * @param ManagerEvent $event
-	 */
-	public function event(ManagerEvent $event) {
-		$actor = $this->session->getUser();
-		if ($actor instanceof IUser) {
-			$actor = $actor->getUID();
-		} else {
-			$actor = '';
-		}
-		$tag = $event->getTag();
-
-		$activity = $this->activityManager->generateEvent();
-		$activity->setApp('systemtags')
-			->setType('systemtags')
-			->setAuthor($actor)
-			->setObject('systemtag', (int)$tag->getId(), $tag->getName());
-		if ($event->getEvent() === ManagerEvent::EVENT_CREATE) {
-			$activity->setSubject(Provider::CREATE_TAG, [
-				$actor,
-				$this->prepareTagAsParameter($event->getTag()),
-			]);
-		} elseif ($event->getEvent() === ManagerEvent::EVENT_UPDATE) {
-			$activity->setSubject(Provider::UPDATE_TAG, [
-				$actor,
-				$this->prepareTagAsParameter($event->getTag()),
-				$this->prepareTagAsParameter($event->getTagBefore()),
-			]);
-		} elseif ($event->getEvent() === ManagerEvent::EVENT_DELETE) {
-			$activity->setSubject(Provider::DELETE_TAG, [
-				$actor,
-				$this->prepareTagAsParameter($event->getTag()),
-			]);
-		} else {
-			return;
-		}
-
-		$group = $this->groupManager->get('admin');
-		if ($group instanceof IGroup) {
-			foreach ($group->getUsers() as $user) {
-				$activity->setAffectedUser($user->getUID());
-				$this->activityManager->publish($activity);
-			}
-		}
-
-		if ($actor !== '' && ($event->getEvent() === ManagerEvent::EVENT_CREATE || $event->getEvent() === ManagerEvent::EVENT_UPDATE)) {
-			$this->updateLastUsedTags($actor, $event->getTag());
-		}
-	}
-
-	/**
-	 * @param MapperEvent $event
-	 */
-	public function mapperEvent(MapperEvent $event) {
-		$tagIds = $event->getTags();
-		if ($event->getObjectType() !== 'files' || empty($tagIds)
-			|| !in_array($event->getEvent(), [MapperEvent::EVENT_ASSIGN, MapperEvent::EVENT_UNASSIGN])
-			|| !$this->appManager->isEnabledForAnyone('activity')) {
-			// System tags not for files, no tags, not (un-)assigning or no activity-app enabled (save the energy)
-			return;
-		}
-
-		try {
-			$tags = $this->tagManager->getTagsByIds($tagIds);
-		} catch (TagNotFoundException $e) {
-			// User assigned/unassigned a non-existing tag, ignore...
-			return;
-		}
-
-		if (empty($tags)) {
-			return;
-		}
-
-		// Get all mount point owners
-		$cache = $this->mountCollection->getMountCache();
-		$mounts = $cache->getMountsForFileId($event->getObjectId());
-		if (empty($mounts)) {
-			return;
-		}
-
-		$users = [];
-		foreach ($mounts as $mount) {
-			$owner = $mount->getUser()->getUID();
-			$ownerFolder = $this->rootFolder->getUserFolder($owner);
-			$nodes = $ownerFolder->getById($event->getObjectId());
-			if (!empty($nodes)) {
-				/** @var Node $node */
-				$node = array_shift($nodes);
-				$al = $this->shareHelper->getPathsForAccessList($node);
-				$users += $al['users'];
-			}
-		}
-
-		$actor = $this->session->getUser();
-		if ($actor instanceof IUser) {
-			$actor = $actor->getUID();
-		} else {
-			$actor = '';
-		}
-
-		$activity = $this->activityManager->generateEvent();
-		$activity->setApp('systemtags')
-			->setType('systemtags')
-			->setAuthor($actor)
-			->setObject($event->getObjectType(), (int)$event->getObjectId());
-
-		foreach ($users as $user => $path) {
-			$user = (string)$user; // numerical ids could be ints which are not accepted everywhere
-			$activity->setAffectedUser($user);
-
-			foreach ($tags as $tag) {
-				// don't publish activity for non-admins if tag is invisible
-				if (!$tag->isUserVisible() && !$this->groupManager->isAdmin($user)) {
-					continue;
-				}
-				if ($event->getEvent() === MapperEvent::EVENT_ASSIGN) {
-					$activity->setSubject(Provider::ASSIGN_TAG, [
-						$actor,
-						$path,
-						$this->prepareTagAsParameter($tag),
-					]);
-				} elseif ($event->getEvent() === MapperEvent::EVENT_UNASSIGN) {
-					$activity->setSubject(Provider::UNASSIGN_TAG, [
-						$actor,
-						$path,
-						$this->prepareTagAsParameter($tag),
-					]);
-				}
-
-				$this->activityManager->publish($activity);
-			}
-		}
-
-		if ($actor !== '' && $event->getEvent() === MapperEvent::EVENT_ASSIGN) {
-			foreach ($tags as $tag) {
-				$this->updateLastUsedTags($actor, $tag);
-			}
-		}
-	}
-
-	/**
-	 * @param string $actor
-	 * @param ISystemTag $tag
-	 */
-	protected function updateLastUsedTags($actor, ISystemTag $tag) {
-		$lastUsedTags = $this->config->getUserValue($actor, 'systemtags', 'last_used', '[]');
-		$lastUsedTags = json_decode($lastUsedTags, true);
-
-		array_unshift($lastUsedTags, $tag->getId());
-		$lastUsedTags = array_unique($lastUsedTags);
-		$lastUsedTags = array_slice($lastUsedTags, 0, 10);
-
-		$this->config->setUserValue($actor, 'systemtags', 'last_used', json_encode($lastUsedTags));
-	}
-
-	/**
-	 * @param ISystemTag $tag
-	 * @return string
-	 */
-	protected function prepareTagAsParameter(ISystemTag $tag) {
-		return json_encode([
-			'id' => $tag->getId(),
-			'name' => $tag->getName(),
-			'assignable' => $tag->isUserAssignable(),
-			'visible' => $tag->isUserVisible(),
-		]);
-	}
-}

apps/systemtags/lib/Activity/TagListener.php

@@ -0,0 +1,218 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+namespace OCA\SystemTags\Activity;
+
+use OCP\Activity\IManager;
+use OCP\App\IAppManager;
+use OCP\Config\IUserConfig;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Files\Config\IMountProviderCollection;
+use OCP\Files\IRootFolder;
+use OCP\Files\Node;
+use OCP\IGroup;
+use OCP\IGroupManager;
+use OCP\IUser;
+use OCP\IUserSession;
+use OCP\Share\IShareHelper;
+use OCP\SystemTag\Events\AbstractTagEvent;
+use OCP\SystemTag\Events\TagCreatedEvent;
+use OCP\SystemTag\Events\TagDeletedEvent;
+use OCP\SystemTag\Events\TagUpdatedEvent;
+use OCP\SystemTag\ISystemTag;
+use OCP\SystemTag\ISystemTagManager;
+use OCP\SystemTag\TagAssignedEvent;
+use OCP\SystemTag\TagNotFoundException;
+use OCP\SystemTag\TagUnassignedEvent;
+use Override;
+
+/**
+ * @template-implements IEventListener<TagAssignedEvent|TagUnassignedEvent|TagUpdatedEvent|TagCreatedEvent|TagDeletedEvent>
+ */
+class TagListener implements IEventListener {
+	public function __construct(
+		private readonly IGroupManager $groupManager,
+		private readonly IManager $activityManager,
+		private readonly IUserSession $session,
+		private readonly IUserConfig $userConfig,
+		private readonly ISystemTagManager $tagManager,
+		private readonly IAppManager $appManager,
+		private readonly IMountProviderCollection $mountCollection,
+		private readonly IRootFolder $rootFolder,
+		private readonly IShareHelper $shareHelper,
+	) {
+	}
+
+	#[Override]
+	public function handle(Event $event): void {
+		if ($event instanceof AbstractTagEvent) {
+			$this->handleManagerEvent($event);
+		} elseif ($event instanceof TagAssignedEvent || $event instanceof TagUnassignedEvent) {
+			$this->handleTagEvent($event);
+		}
+	}
+
+	private function handleManagerEvent(AbstractTagEvent $event): void {
+		if (!$this->appManager->isEnabledForAnyone('activity')) {
+			return;
+		}
+
+		$actor = $this->session->getUser();
+		if ($actor instanceof IUser) {
+			$actor = $actor->getUID();
+		} else {
+			$actor = '';
+		}
+		$tag = $event->getTag();
+
+		$activity = $this->activityManager->generateEvent();
+		$activity->setApp('systemtags')
+			->setType('systemtags')
+			->setAuthor($actor)
+			->setObject('systemtag', (int)$tag->getId(), $tag->getName());
+		if ($event instanceof TagCreatedEvent) {
+			$activity->setSubject(Provider::CREATE_TAG, [
+				$actor,
+				$this->prepareTagAsParameter($event->getTag()),
+			]);
+		} elseif ($event instanceof TagUpdatedEvent) {
+			$activity->setSubject(Provider::UPDATE_TAG, [
+				$actor,
+				$this->prepareTagAsParameter($event->getTag()),
+				$this->prepareTagAsParameter($event->getTagBefore()),
+			]);
+		} elseif ($event instanceof TagDeletedEvent) {
+			$activity->setSubject(Provider::DELETE_TAG, [
+				$actor,
+				$this->prepareTagAsParameter($event->getTag()),
+			]);
+		} else {
+			return;
+		}
+
+		$group = $this->groupManager->get('admin');
+		if ($group instanceof IGroup) {
+			foreach ($group->getUsers() as $user) {
+				$activity->setAffectedUser($user->getUID());
+				$this->activityManager->publish($activity);
+			}
+		}
+
+		if ($actor !== '' && ($event instanceof TagCreatedEvent || $event instanceof TagUpdatedEvent)) {
+			$this->updateLastUsedTags($actor, $event->getTag());
+		}
+	}
+
+	private function handleTagEvent(TagAssignedEvent|TagUnassignedEvent $event) {
+		$tagIds = $event->getTags();
+		if ($event->getObjectType() !== 'files' || empty($tagIds)
+			|| !$this->appManager->isEnabledForAnyone('activity')) {
+			// System tags not for files, no tags, not (un-)assigning or no activity-app enabled (save the energy)
+			return;
+		}
+
+		try {
+			$tags = $this->tagManager->getTagsByIds($tagIds);
+		} catch (TagNotFoundException $e) {
+			// User assigned/unassigned a non-existing tag, ignore...
+			return;
+		}
+
+		if (empty($tags)) {
+			return;
+		}
+
+		// Get all mount point owners
+		$cache = $this->mountCollection->getMountCache();
+		foreach ($event->getObjectIds() as $objectId) {
+			$mounts = $cache->getMountsForFileId((int)$objectId);
+			if (empty($mounts)) {
+				continue;
+			}
+
+			$users = [];
+			foreach ($mounts as $mount) {
+				$owner = $mount->getUser()->getUID();
+				$ownerFolder = $this->rootFolder->getUserFolder($owner);
+				$nodes = $ownerFolder->getById((int)$objectId);
+				if (!empty($nodes)) {
+					/** @var Node $node */
+					$node = array_shift($nodes);
+					$al = $this->shareHelper->getPathsForAccessList($node);
+					$users += $al['users'];
+				}
+			}
+
+			$actor = $this->session->getUser();
+			if ($actor instanceof IUser) {
+				$actor = $actor->getUID();
+			} else {
+				$actor = '';
+			}
+
+			$activity = $this->activityManager->generateEvent();
+			$activity->setApp('systemtags')
+				->setType('systemtags')
+				->setAuthor($actor)
+				->setObject($event->getObjectType(), (int)$objectId);
+
+			foreach ($users as $user => $path) {
+				$user = (string)$user; // numerical ids could be ints which are not accepted everywhere
+				$activity->setAffectedUser($user);
+
+				foreach ($tags as $tag) {
+					// don't publish activity for non-admins if tag is invisible
+					if (!$tag->isUserVisible() && !$this->groupManager->isAdmin($user)) {
+						continue;
+					}
+					if ($event instanceof TagAssignedEvent) {
+						$activity->setSubject(Provider::ASSIGN_TAG, [
+							$actor,
+							$path,
+							$this->prepareTagAsParameter($tag),
+						]);
+					} else {
+						$activity->setSubject(Provider::UNASSIGN_TAG, [
+							$actor,
+							$path,
+							$this->prepareTagAsParameter($tag),
+						]);
+					}
+
+					$this->activityManager->publish($activity);
+				}
+			}
+
+			if ($actor !== '' && $event instanceof TagAssignedEvent) {
+				foreach ($tags as $tag) {
+					$this->updateLastUsedTags($actor, $tag);
+				}
+			}
+		}
+	}
+
+	protected function updateLastUsedTags(string $actor, ISystemTag $tag): void {
+		$lastUsedTags = $this->userConfig->getValueArray($actor, 'systemtags', 'last_used');
+
+		array_unshift($lastUsedTags, $tag->getId());
+		$lastUsedTags = array_unique($lastUsedTags);
+		$lastUsedTags = array_slice($lastUsedTags, 0, 10);
+
+		$this->userConfig->setValueArray($actor, 'systemtags', 'last_used', $lastUsedTags);
+	}
+
+	protected function prepareTagAsParameter(ISystemTag $tag): string {
+		return json_encode([
+			'id' => $tag->getId(),
+			'name' => $tag->getName(),
+			'assignable' => $tag->isUserAssignable(),
+			'visible' => $tag->isUserVisible(),
+		], flags: JSON_THROW_ON_ERROR);
+	}
+}

apps/systemtags/lib/AppInfo/Application.php

@@ -11,7 +11,7 @@ namespace OCA\SystemTags\AppInfo;
 
 use OCA\Files\Event\LoadAdditionalScriptsEvent;
 use OCA\Files_Sharing\Event\BeforeTemplateRenderedEvent;
-use OCA\SystemTags\Activity\Listener;
+use OCA\SystemTags\Activity\TagListener;
 use OCA\SystemTags\Capabilities;
 use OCA\SystemTags\Listeners\BeforeSabrePubliclyLoadedListener;
 use OCA\SystemTags\Listeners\BeforeTemplateRenderedListener;
@@ -22,9 +22,11 @@ use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
 use OCP\AppFramework\Bootstrap\IRegistrationContext;
 use OCP\BeforeSabrePubliclyLoadedEvent;
-use OCP\EventDispatcher\IEventDispatcher;
-use OCP\SystemTag\ManagerEvent;
-use OCP\SystemTag\MapperEvent;
+use OCP\SystemTag\Events\TagCreatedEvent;
+use OCP\SystemTag\Events\TagDeletedEvent;
+use OCP\SystemTag\Events\TagUpdatedEvent;
+use OCP\SystemTag\TagAssignedEvent;
+use OCP\SystemTag\TagUnassignedEvent;
 
 class Application extends App implements IBootstrap {
 	public const APP_ID = 'systemtags';
@@ -40,27 +42,16 @@ class Application extends App implements IBootstrap {
 		$context->registerEventListener(LoadAdditionalScriptsEvent::class, LoadAdditionalScriptsListener::class);
 		$context->registerEventListener(BeforeTemplateRenderedEvent::class, BeforeTemplateRenderedListener::class);
 		$context->registerEventListener(BeforeSabrePubliclyLoadedEvent::class, BeforeSabrePubliclyLoadedListener::class);
+
+		$context->registerEventListener(TagCreatedEvent::class, TagListener::class);
+		$context->registerEventListener(TagDeletedEvent::class, TagListener::class);
+		$context->registerEventListener(TagUpdatedEvent::class, TagListener::class);
+
+		$context->registerEventListener(TagAssignedEvent::class, TagListener::class);
+		$context->registerEventListener(TagUnassignedEvent::class, TagListener::class);
 	}
 
 	#[\Override]
 	public function boot(IBootContext $context): void {
-		$context->injectFn(function (IEventDispatcher $dispatcher) use ($context): void {
-			$managerListener = function (ManagerEvent $event) use ($context): void {
-				/** @var Listener $listener */
-				$listener = $context->getServerContainer()->query(Listener::class);
-				$listener->event($event);
-			};
-			$dispatcher->addListener(ManagerEvent::EVENT_CREATE, $managerListener);
-			$dispatcher->addListener(ManagerEvent::EVENT_DELETE, $managerListener);
-			$dispatcher->addListener(ManagerEvent::EVENT_UPDATE, $managerListener);
-
-			$mapperListener = function (MapperEvent $event) use ($context): void {
-				/** @var Listener $listener */
-				$listener = $context->getServerContainer()->query(Listener::class);
-				$listener->mapperEvent($event);
-			};
-			$dispatcher->addListener(MapperEvent::EVENT_ASSIGN, $mapperListener);
-			$dispatcher->addListener(MapperEvent::EVENT_UNASSIGN, $mapperListener);
-		});
 	}
 }

apps/systemtags/lib/Controller/LastUsedController.php

@@ -10,33 +10,23 @@ namespace OCA\SystemTags\Controller;
 use OCP\AppFramework\Controller;
 use OCP\AppFramework\Http\Attribute\NoAdminRequired;
 use OCP\AppFramework\Http\DataResponse;
-use OCP\IConfig;
+use OCP\Config\IUserConfig;
 use OCP\IRequest;
 use OCP\IUserSession;
 
 class LastUsedController extends Controller {
-
-	/**
-	 * @param string $appName
-	 * @param IRequest $request
-	 * @param IConfig $config
-	 * @param IUserSession $userSession
-	 */
 	public function __construct(
-		$appName,
+		string $appName,
 		IRequest $request,
-		protected IConfig $config,
-		protected IUserSession $userSession,
+		protected readonly IUserConfig $config,
+		protected readonly IUserSession $userSession,
 	) {
 		parent::__construct($appName, $request);
 	}
 
 	#[NoAdminRequired]
-	public function getLastUsedTagIds() {
-		$lastUsed = $this->config->getUserValue($this->userSession->getUser()->getUID(), 'systemtags', 'last_used', '[]');
-		$tagIds = json_decode($lastUsed, true);
-		return new DataResponse(array_map(function ($id) {
-			return (string)$id;
-		}, $tagIds));
+	public function getLastUsedTagIds(): DataResponse {
+		$lastUsed = $this->config->getValueArray($this->userSession->getUser()->getUID(), 'systemtags', 'last_used');
+		return new DataResponse(array_map(static fn ($id): string => (string)$id, $lastUsed));
 	}
 }

build/psalm-baseline.xml

@@ -7,9 +7,6 @@
       <code><![CDATA[Share::class]]></code>
       <code><![CDATA[Share::class]]></code>
     </DeprecatedClass>
-    <DeprecatedConstant>
-      <code><![CDATA[ManagerEvent::EVENT_CREATE]]></code>
-    </DeprecatedConstant>
     <DeprecatedMethod>
       <code><![CDATA[Util::connectHook('\OCA\Files_Trashbin\Trashbin', 'post_restore', $trashActions, 'restore')]]></code>
       <code><![CDATA[Util::connectHook('\OCP\Trashbin', 'preDelete', $trashActions, 'delete')]]></code>
@@ -2440,54 +2437,6 @@
       <code><![CDATA[getAppValue]]></code>
     </DeprecatedMethod>
   </file>
-  <file src="apps/systemtags/lib/Activity/Listener.php">
-    <DeprecatedConstant>
-      <code><![CDATA[ManagerEvent::EVENT_CREATE]]></code>
-      <code><![CDATA[ManagerEvent::EVENT_CREATE]]></code>
-      <code><![CDATA[ManagerEvent::EVENT_DELETE]]></code>
-      <code><![CDATA[ManagerEvent::EVENT_UPDATE]]></code>
-      <code><![CDATA[ManagerEvent::EVENT_UPDATE]]></code>
-      <code><![CDATA[MapperEvent::EVENT_ASSIGN]]></code>
-      <code><![CDATA[MapperEvent::EVENT_ASSIGN]]></code>
-      <code><![CDATA[MapperEvent::EVENT_ASSIGN]]></code>
-      <code><![CDATA[MapperEvent::EVENT_UNASSIGN]]></code>
-      <code><![CDATA[MapperEvent::EVENT_UNASSIGN]]></code>
-    </DeprecatedConstant>
-    <DeprecatedMethod>
-      <code><![CDATA[getUserValue]]></code>
-      <code><![CDATA[setUserValue]]></code>
-    </DeprecatedMethod>
-    <FalsableReturnStatement>
-      <code><![CDATA[json_encode([
-			'id' => $tag->getId(),
-			'name' => $tag->getName(),
-			'assignable' => $tag->isUserAssignable(),
-			'visible' => $tag->isUserVisible(),
-		])]]></code>
-    </FalsableReturnStatement>
-    <InvalidArgument>
-      <code><![CDATA[$event->getObjectId()]]></code>
-      <code><![CDATA[$event->getObjectId()]]></code>
-    </InvalidArgument>
-  </file>
-  <file src="apps/systemtags/lib/AppInfo/Application.php">
-    <DeprecatedConstant>
-      <code><![CDATA[ManagerEvent::EVENT_CREATE]]></code>
-      <code><![CDATA[ManagerEvent::EVENT_DELETE]]></code>
-      <code><![CDATA[ManagerEvent::EVENT_UPDATE]]></code>
-      <code><![CDATA[MapperEvent::EVENT_ASSIGN]]></code>
-      <code><![CDATA[MapperEvent::EVENT_UNASSIGN]]></code>
-    </DeprecatedConstant>
-    <DeprecatedMethod>
-      <code><![CDATA[query]]></code>
-      <code><![CDATA[query]]></code>
-    </DeprecatedMethod>
-  </file>
-  <file src="apps/systemtags/lib/Controller/LastUsedController.php">
-    <DeprecatedMethod>
-      <code><![CDATA[getUserValue]]></code>
-    </DeprecatedMethod>
-  </file>
   <file src="apps/testing/lib/AlternativeHomeUserBackend.php">
     <DeprecatedInterface>
       <code><![CDATA[AlternativeHomeUserBackend]]></code>

lib/composer/composer/autoload_classmap.php

@@ -895,6 +895,10 @@ return array(
     'OCP\\Support\\Subscription\\IRegistry' => $baseDir . '/lib/public/Support/Subscription/IRegistry.php',
     'OCP\\Support\\Subscription\\ISubscription' => $baseDir . '/lib/public/Support/Subscription/ISubscription.php',
     'OCP\\Support\\Subscription\\ISupportedApps' => $baseDir . '/lib/public/Support/Subscription/ISupportedApps.php',
+    'OCP\\SystemTag\\Events\\AbstractTagEvent' => $baseDir . '/lib/public/SystemTag/Events/AbstractTagEvent.php',
+    'OCP\\SystemTag\\Events\\TagCreatedEvent' => $baseDir . '/lib/public/SystemTag/Events/TagCreatedEvent.php',
+    'OCP\\SystemTag\\Events\\TagDeletedEvent' => $baseDir . '/lib/public/SystemTag/Events/TagDeletedEvent.php',
+    'OCP\\SystemTag\\Events\\TagUpdatedEvent' => $baseDir . '/lib/public/SystemTag/Events/TagUpdatedEvent.php',
     'OCP\\SystemTag\\ISystemTag' => $baseDir . '/lib/public/SystemTag/ISystemTag.php',
     'OCP\\SystemTag\\ISystemTagManager' => $baseDir . '/lib/public/SystemTag/ISystemTagManager.php',
     'OCP\\SystemTag\\ISystemTagManagerFactory' => $baseDir . '/lib/public/SystemTag/ISystemTagManagerFactory.php',

lib/composer/composer/autoload_static.php

@@ -936,6 +936,10 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OCP\\Support\\Subscription\\IRegistry' => __DIR__ . '/../../..' . '/lib/public/Support/Subscription/IRegistry.php',
         'OCP\\Support\\Subscription\\ISubscription' => __DIR__ . '/../../..' . '/lib/public/Support/Subscription/ISubscription.php',
         'OCP\\Support\\Subscription\\ISupportedApps' => __DIR__ . '/../../..' . '/lib/public/Support/Subscription/ISupportedApps.php',
+        'OCP\\SystemTag\\Events\\AbstractTagEvent' => __DIR__ . '/../../..' . '/lib/public/SystemTag/Events/AbstractTagEvent.php',
+        'OCP\\SystemTag\\Events\\TagCreatedEvent' => __DIR__ . '/../../..' . '/lib/public/SystemTag/Events/TagCreatedEvent.php',
+        'OCP\\SystemTag\\Events\\TagDeletedEvent' => __DIR__ . '/../../..' . '/lib/public/SystemTag/Events/TagDeletedEvent.php',
+        'OCP\\SystemTag\\Events\\TagUpdatedEvent' => __DIR__ . '/../../..' . '/lib/public/SystemTag/Events/TagUpdatedEvent.php',
         'OCP\\SystemTag\\ISystemTag' => __DIR__ . '/../../..' . '/lib/public/SystemTag/ISystemTag.php',
         'OCP\\SystemTag\\ISystemTagManager' => __DIR__ . '/../../..' . '/lib/public/SystemTag/ISystemTagManager.php',
         'OCP\\SystemTag\\ISystemTagManagerFactory' => __DIR__ . '/../../..' . '/lib/public/SystemTag/ISystemTagManagerFactory.php',

lib/private/SystemTag/SystemTagManager.php

@@ -17,6 +17,9 @@ use OCP\IDBConnection;
 use OCP\IGroupManager;
 use OCP\IUser;
 use OCP\IUserSession;
+use OCP\SystemTag\Events\TagCreatedEvent;
+use OCP\SystemTag\Events\TagDeletedEvent;
+use OCP\SystemTag\Events\TagUpdatedEvent;
 use OCP\SystemTag\ISystemTag;
 use OCP\SystemTag\ISystemTagManager;
 use OCP\SystemTag\ManagerEvent;
@@ -214,6 +217,7 @@ class SystemTagManager implements ISystemTagManager {
 		$this->dispatcher->dispatch(ManagerEvent::EVENT_CREATE, new ManagerEvent(
 			ManagerEvent::EVENT_CREATE, $tag
 		));
+		$this->dispatcher->dispatchTyped(new TagCreatedEvent($tag));
 
 		return $tag;
 	}
@@ -295,6 +299,7 @@ class SystemTagManager implements ISystemTagManager {
 		$this->dispatcher->dispatch(ManagerEvent::EVENT_UPDATE, new ManagerEvent(
 			ManagerEvent::EVENT_UPDATE, $afterUpdate, $beforeUpdate
 		));
+		$this->dispatcher->dispatchTyped(new TagUpdatedEvent($afterUpdate, $beforeUpdate));
 	}
 
 	#[\Override]
@@ -338,6 +343,7 @@ class SystemTagManager implements ISystemTagManager {
 			$this->dispatcher->dispatch(ManagerEvent::EVENT_DELETE, new ManagerEvent(
 				ManagerEvent::EVENT_DELETE, $tag
 			));
+			$this->dispatcher->dispatchTyped(new TagDeletedEvent($tag));
 		}
 
 		if ($tagNotFoundException !== null) {

lib/public/SystemTag/Events/AbstractTagEvent.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCP\SystemTag\Events;
+
+use OCP\AppFramework\Attribute\Consumable;
+use OCP\EventDispatcher\Event;
+use OCP\SystemTag\ISystemTag;
+
+/**
+ * Abstract event related to the lifecycle of a tag.
+ *
+ * @since 35.0.0
+ */
+#[Consumable(since: '35.0.0')]
+abstract class AbstractTagEvent extends Event {
+	/**
+	 * AbstractTagEvent constructor
+	 * @since 35.0.0
+	 */
+	public function __construct(
+		private readonly ISystemTag $tag,
+	) {
+	}
+
+	/**
+	 * @since 35.0.0
+	 */
+	public function getTag(): ISystemTag {
+		return $this->tag;
+	}
+}

lib/public/SystemTag/Events/TagCreatedEvent.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCP\SystemTag\Events;
+
+use OCP\AppFramework\Attribute\Consumable;
+
+/**
+ * Event triggered when creating a new tag.
+ *
+ * @since 35.0.0
+ */
+#[Consumable(since: '35.0.0')]
+class TagCreatedEvent extends AbstractTagEvent {
+}

lib/public/SystemTag/Events/TagDeletedEvent.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCP\SystemTag\Events;
+
+use OCP\AppFramework\Attribute\Consumable;
+
+/**
+ * Event triggered when deleting a new tag.
+ *
+ * @since 35.0.0
+ */
+#[Consumable(since: '35.0.0')]
+class TagDeletedEvent extends AbstractTagEvent {
+}

lib/public/SystemTag/Events/TagUpdatedEvent.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH
+ * SPDX-FileContributor: Carl Schwan
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCP\SystemTag\Events;
+
+use OCP\AppFramework\Attribute\Consumable;
+use OCP\SystemTag\ISystemTag;
+
+/**
+ * Event triggered when updated a tag.
+ *
+ * @since 35.0.0
+ */
+#[Consumable(since: '35.0.0')]
+class TagUpdatedEvent extends AbstractTagEvent {
+	/**
+	 * TagUpdatedEvent constructor
+	 * @since 35.0.0
+	 */
+	public function __construct(
+		ISystemTag $tag,
+		private readonly ISystemTag $beforeTag,
+	) {
+		parent::__construct($tag);
+	}
+
+	/**
+	 * Return the tag state before it was updated.
+	 *
+	 * @since 35.0.0
+	 */
+	public function getTagBefore(): ISystemTag {
+		return $this->beforeTag;
+	}
+}

lib/public/SystemTag/ManagerEvent.php

@@ -15,6 +15,7 @@ use OCP\EventDispatcher\Event;
  * Class ManagerEvent
  *
  * @since 9.0.0
+ * @deprecated 34.0.0
  */
 class ManagerEvent extends Event {
 	/**

psalm-strict.xml

@@ -35,6 +35,7 @@
 		<file name="lib/public/DB/QueryBuilder/ITypedQueryBuilder.php"/>
 		<file name="lib/private/Share20/ShareHelper.php"/>
 		<file name="lib/public/Share/IShareHelper.php"/>
+		<file name="lib/public/SystemTag/Events/*.php"/>
 		<directory name="apps/appstore/lib" />
 		<ignoreFiles>
 			<!-- Missing types of the AppFetcher and the OC_Apps class for return types -->