feat: make systemtags public visible

apps/dav/appinfo/v2/publicremote.php

@@ -12,6 +12,7 @@
 use OCA\DAV\Storage\PublicOwnerWrapper;
 use OCA\DAV\Storage\PublicShareWrapper;
 use OCA\FederatedFileSharing\FederatedShareProvider;
+use OCP\BeforeSabrePubliclyLoadedEvent;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\Mount\IMountManager;
 use OCP\IConfig;
@@ -35,6 +36,7 @@
 
 $session = \OCP\Server::get(ISession::class);
 $request = \OCP\Server::get(IRequest::class);
+$eventDispatcher = \OCP\Server::get(IEventDispatcher::class);
 
 $session->close();
 $requestUri = $request->getRequestUri();
@@ -59,7 +61,7 @@
 	\OCP\Server::get(ITagManager::class),
 	$request,
 	\OCP\Server::get(IPreview::class),
-	\OCP\Server::get(IEventDispatcher::class),
+	$eventDispatcher,
 	$l10nFactory->get('dav'),
 );
 
@@ -135,5 +137,9 @@
 $server->addPlugin($linkCheckPlugin);
 $server->addPlugin($filesDropPlugin);
 
+// allow setup of additional plugins
+$event = new BeforeSabrePubliclyLoadedEvent($server);
+$eventDispatcher->dispatchTyped($event);
+
 // And off we go!
 $server->start();

apps/dav/lib/SystemTag/SystemTagList.php

@@ -20,12 +20,14 @@
 class SystemTagList implements Element {
 	public const NS_NEXTCLOUD = 'http://nextcloud.org/ns';
 
-	/** @var ISystemTag[] */
-	private array $tags;
-	private ISystemTagManager $tagManager;
-	private IUser $user;
-
-	public function __construct(array $tags, ISystemTagManager $tagManager, IUser $user) {
+	/**
+	 * @param ISystemTag[] $tags
+	 */
+	public function __construct(
+		private array $tags,
+		private ISystemTagManager $tagManager,
+		private ?IUser $user,
+	) {
 		$this->tags = $tags;
 		$this->tagManager = $tagManager;
 		$this->user = $user;

apps/dav/lib/SystemTag/SystemTagPlugin.php

@@ -305,9 +305,6 @@ private function propfindForFile(PropFind $propFind, Node $node): void {
 
 		$propFind->handle(self::SYSTEM_TAGS_PROPERTYNAME, function () use ($node) {
 			$user = $this->userSession->getUser();
-			if ($user === null) {
-				return;
-			}
 
 			$tags = $this->getTagsForFile($node->getId(), $user);
 			usort($tags, function (ISystemTag $tagA, ISystemTag $tagB): int {
@@ -321,8 +318,7 @@ private function propfindForFile(PropFind $propFind, Node $node): void {
 	 * @param int $fileId
 	 * @return ISystemTag[]
 	 */
-	private function getTagsForFile(int $fileId, IUser $user): array {
-
+	private function getTagsForFile(int $fileId, ?IUser $user): array {
 		if (isset($this->cachedTagMappings[$fileId])) {
 			$tagIds = $this->cachedTagMappings[$fileId];
 		} else {

apps/systemtags/composer/composer/autoload_classmap.php

@@ -13,6 +13,9 @@
     'OCA\\SystemTags\\AppInfo\\Application' => $baseDir . '/../lib/AppInfo/Application.php',
     'OCA\\SystemTags\\Capabilities' => $baseDir . '/../lib/Capabilities.php',
     'OCA\\SystemTags\\Controller\\LastUsedController' => $baseDir . '/../lib/Controller/LastUsedController.php',
+    'OCA\\SystemTags\\Listeners\\BeforeSabrePubliclyLoadedListener' => $baseDir . '/../lib/Listeners/BeforeSabrePubliclyLoadedListener.php',
+    'OCA\\SystemTags\\Listeners\\BeforeTemplateRenderedListener' => $baseDir . '/../lib/Listeners/BeforeTemplateRenderedListener.php',
+    'OCA\\SystemTags\\Listeners\\LoadAdditionalScriptsListener' => $baseDir . '/../lib/Listeners/LoadAdditionalScriptsListener.php',
     'OCA\\SystemTags\\Search\\TagSearchProvider' => $baseDir . '/../lib/Search/TagSearchProvider.php',
     'OCA\\SystemTags\\Settings\\Admin' => $baseDir . '/../lib/Settings/Admin.php',
 );

apps/systemtags/composer/composer/autoload_static.php

@@ -28,6 +28,9 @@ class ComposerStaticInitSystemTags
         'OCA\\SystemTags\\AppInfo\\Application' => __DIR__ . '/..' . '/../lib/AppInfo/Application.php',
         'OCA\\SystemTags\\Capabilities' => __DIR__ . '/..' . '/../lib/Capabilities.php',
         'OCA\\SystemTags\\Controller\\LastUsedController' => __DIR__ . '/..' . '/../lib/Controller/LastUsedController.php',
+        'OCA\\SystemTags\\Listeners\\BeforeSabrePubliclyLoadedListener' => __DIR__ . '/..' . '/../lib/Listeners/BeforeSabrePubliclyLoadedListener.php',
+        'OCA\\SystemTags\\Listeners\\BeforeTemplateRenderedListener' => __DIR__ . '/..' . '/../lib/Listeners/BeforeTemplateRenderedListener.php',
+        'OCA\\SystemTags\\Listeners\\LoadAdditionalScriptsListener' => __DIR__ . '/..' . '/../lib/Listeners/LoadAdditionalScriptsListener.php',
         'OCA\\SystemTags\\Search\\TagSearchProvider' => __DIR__ . '/..' . '/../lib/Search/TagSearchProvider.php',
         'OCA\\SystemTags\\Settings\\Admin' => __DIR__ . '/..' . '/../lib/Settings/Admin.php',
     );

apps/systemtags/lib/AppInfo/Application.php

@@ -9,13 +9,18 @@
 namespace OCA\SystemTags\AppInfo;
 
 use OCA\Files\Event\LoadAdditionalScriptsEvent;
+use OCA\Files_Sharing\Event\BeforeTemplateRenderedEvent;
 use OCA\SystemTags\Activity\Listener;
 use OCA\SystemTags\Capabilities;
+use OCA\SystemTags\Listeners\BeforeSabrePubliclyLoadedListener;
+use OCA\SystemTags\Listeners\BeforeTemplateRenderedListener;
+use OCA\SystemTags\Listeners\LoadAdditionalScriptsListener;
 use OCA\SystemTags\Search\TagSearchProvider;
 use OCP\AppFramework\App;
 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;
@@ -30,6 +35,9 @@ public function __construct() {
 	public function register(IRegistrationContext $context): void {
 		$context->registerSearchProvider(TagSearchProvider::class);
 		$context->registerCapability(Capabilities::class);
+		$context->registerEventListener(LoadAdditionalScriptsEvent::class, LoadAdditionalScriptsListener::class);
+		$context->registerEventListener(BeforeTemplateRenderedEvent::class, BeforeTemplateRenderedListener::class);
+		$context->registerEventListener(BeforeSabrePubliclyLoadedEvent::class, BeforeSabrePubliclyLoadedListener::class);
 	}
 
 	public function boot(IBootContext $context): void {

apps/systemtags/lib/Listeners/BeforeSabrePubliclyLoadedListener.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\SystemTags\Listeners;
+
+use OCA\DAV\SystemTag\SystemTagPlugin;
+use OCP\BeforeSabrePubliclyLoadedEvent;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Server;
+
+/**
+ * @template-implements IEventListener<BeforeSabrePubliclyLoadedEvent>
+ */
+class BeforeSabrePubliclyLoadedListener implements IEventListener {
+	public function handle(Event $event): void {
+		if (!$event instanceof BeforeSabrePubliclyLoadedEvent) {
+			return;
+		}
+
+		$server = $event->getServer();
+		if ($server === null) {
+			return;
+		}
+
+		$server->addPlugin(Server::get(SystemTagPlugin::class));
+	}
+}

apps/systemtags/lib/Listeners/BeforeTemplateRenderedListener.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\SystemTags\Listeners;
+
+use OCA\Files_Sharing\Event\BeforeTemplateRenderedEvent;
+use OCA\SystemTags\AppInfo\Application;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Util;
+
+/**
+ * @template-implements IEventListener<BeforeTemplateRenderedEvent>
+ */
+class BeforeTemplateRenderedListener implements IEventListener {
+	public function handle(Event $event): void {
+		if (!$event instanceof BeforeTemplateRenderedEvent) {
+			return;
+		}
+		Util::addInitScript(Application::APP_ID, 'init');
+	}
+}

apps/systemtags/lib/Listeners/LoadAdditionalScriptsListener.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\SystemTags\Listeners;
+
+use OCA\Files\Event\LoadAdditionalScriptsEvent;
+use OCA\SystemTags\AppInfo\Application;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Util;
+
+/**
+ * @template-implements IEventListener<LoadAdditionalScriptsEvent>
+ */
+class LoadAdditionalScriptsListener implements IEventListener {
+	public function handle(Event $event): void {
+		if (!$event instanceof LoadAdditionalScriptsEvent) {
+			return;
+		}
+		Util::addInitScript(Application::APP_ID, 'init');
+	}
+}

lib/private/SystemTag/SystemTagManager.php

@@ -305,7 +305,11 @@ public function deleteTags($tagIds): void {
 	/**
 	 * {@inheritdoc}
 	 */
-	public function canUserAssignTag(ISystemTag $tag, IUser $user): bool {
+	public function canUserAssignTag(ISystemTag $tag, ?IUser $user): bool {
+		if ($user === null) {
+			return false;
+		}
+
 		// early check to avoid unneeded group lookups
 		if ($tag->isUserAssignable() && $tag->isUserVisible()) {
 			return true;
@@ -333,11 +337,21 @@ public function canUserAssignTag(ISystemTag $tag, IUser $user): bool {
 	/**
 	 * {@inheritdoc}
 	 */
-	public function canUserSeeTag(ISystemTag $tag, IUser $user): bool {
+	public function canUserSeeTag(ISystemTag $tag, ?IUser $user): bool {
+		// If no user, then we only show public tags
+		if (!$user && $tag->getAccessLevel() === ISystemTag::ACCESS_LEVEL_PUBLIC) {
+			return true;
+		}
+
 		if ($tag->isUserVisible()) {
 			return true;
 		}
 
+		// if not returned yet, and user is not logged in, then the tag is not visible
+		if ($user === null) {
+			return false;
+		}
+
 		if ($this->groupManager->isAdmin($user->getUID())) {
 			return true;
 		}

lib/public/SystemTag/ISystemTagManager.php

@@ -106,25 +106,27 @@ public function deleteTags($tagIds);
 	 * given id.
 	 *
 	 * @param ISystemTag $tag tag to check permission for
-	 * @param IUser $user user to check permission for
+	 * @param IUser|null $user user to check permission for
 	 *
 	 * @return bool true if the user is allowed to assign/unassign the tag, false otherwise
 	 *
 	 * @since 9.1.0
+	 * @since 31.0.0 `$user` can be null to check anonymous permissions
 	 */
-	public function canUserAssignTag(ISystemTag $tag, IUser $user): bool;
+	public function canUserAssignTag(ISystemTag $tag, ?IUser $user): bool;
 
 	/**
 	 * Checks whether the given user is allowed to see the tag with the given id.
 	 *
 	 * @param ISystemTag $tag tag to check permission for
-	 * @param IUser $user user to check permission for
+	 * @param IUser|null $user user to check permission for
 	 *
 	 * @return bool true if the user can see the tag, false otherwise
 	 *
 	 * @since 9.1.0
+	 * @since 31.0.0 `$user` can be null to check anonymous permissions
 	 */
-	public function canUserSeeTag(ISystemTag $tag, IUser $user): bool;
+	public function canUserSeeTag(ISystemTag $tag, ?IUser $user): bool;
 
 	/**
 	 * Set groups that can assign a given tag.