Add a listener to update trashed items when parent is renamed

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

lib/AppInfo/Application.php

@@ -43,6 +43,7 @@
 use OCA\GroupFolders\Folder\FolderManager;
 use OCA\GroupFolders\Listeners\CircleDestroyedEventListener;
 use OCA\GroupFolders\Listeners\LoadAdditionalScriptsListener;
+use OCA\GroupFolders\Listeners\NodeRenamedListener;
 use OCA\GroupFolders\Mount\MountProvider;
 use OCA\GroupFolders\Trash\TrashBackend;
 use OCA\GroupFolders\Trash\TrashManager;
@@ -55,6 +56,7 @@
 use OCP\AppFramework\Bootstrap\IRegistrationContext;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\Files\Config\IMountProviderCollection;
+use OCP\Files\Events\Node\NodeRenamedEvent;
 use OCP\Files\Folder;
 use OCP\Files\IMimeTypeLoader;
 use OCP\Files\IRootFolder;
@@ -90,6 +92,7 @@ public function register(IRegistrationContext $context): void {
 		$context->registerEventListener(LoadAdditionalScriptsEvent::class, LoadAdditionalScriptsListener::class);
 		$context->registerEventListener(BeforeTemplateRenderedEvent::class, LoadAdditionalScriptsListener::class);
 		$context->registerEventListener(CircleDestroyedEvent::class, CircleDestroyedEventListener::class);
+		$context->registerEventListener(NodeRenamedEvent::class, NodeRenamedListener::class);
 
 		$context->registerService('GroupAppFolder', function (ContainerInterface $c): Folder {
 			/** @var IRootFolder $rootFolder */

lib/Listeners/NodeRenamedListener.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2023 Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @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\GroupFolders\Listeners;
+
+use OCA\GroupFolders\Mount\GroupFolderStorage;
+use OCA\GroupFolders\Trash\TrashManager;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Files\Events\Node\NodeRenamedEvent;
+use OCP\Files\Folder;
+use Psr\Log\LoggerInterface;
+
+/**
+ * @template-implements IEventListener<NodeRenamedEvent>
+ */
+class NodeRenamedListener implements IEventListener {
+	public function __construct(
+		private TrashManager $trashManager,
+		private LoggerInterface $logger,
+	) {
+	}
+
+	public function handle(Event $event): void {
+		$source = $event->getSource();
+		$target = $event->getTarget();
+		// Look at the parent because the node itself is not existing anymore
+		$sourceStorage = $source->getParent()->getStorage();
+		$targetStorage = $target->getStorage();
+
+		if (($target instanceof Folder) &&
+			$sourceStorage->instanceOfStorage(GroupFolderStorage::class) &&
+			$targetStorage->instanceOfStorage(GroupFolderStorage::class)) {
+			$sourcePath = preg_replace('/^'.preg_quote($source->getParent()->getMountPoint()->getMountPoint(), '/').'/', '', $source->getPath());
+			$targetPath = preg_replace('/^'.preg_quote($target->getMountPoint()->getMountPoint(), '/').'/', '', $target->getPath());
+			$this->trashManager->updateTrashedChildren($sourceStorage->getFolderId(), $targetStorage->getFolderId(), $sourcePath, $targetPath);
+		}
+	}
+}

lib/Trash/TrashManager.php

@@ -25,9 +25,9 @@
 use OCP\IDBConnection;
 
 class TrashManager {
-	private IDBConnection $connection;
-
-	public function __construct(IDBConnection $connection) {
+	public function __construct(
+		private IDBConnection $connection,
+	) {
 		$this->connection = $connection;
 	}
 
@@ -80,4 +80,30 @@ public function emptyTrashbin(int $folderId): void {
 			->where($query->expr()->eq('folder_id', $query->createNamedParameter($folderId, IQueryBuilder::PARAM_INT)));
 		$query->executeStatement();
 	}
+
+	public function updateTrashedChildren(int $fromFolderId, int $toFolderId, string $fromLocation, string $toLocation): void {
+		// Update deep children
+		$query = $this->connection->getQueryBuilder();
+		$fun = $query->func();
+		$sourceLength = mb_strlen($fromLocation);
+		$newPathFunction = $fun->concat(
+			$query->createNamedParameter($toLocation),
+			$fun->substring('original_location', $query->createNamedParameter($sourceLength + 1, IQueryBuilder::PARAM_INT))// +1 for the leading slash
+		);
+		$query->update('group_folders_trash')
+			->set('folder_id', $query->createNamedParameter($toFolderId, IQueryBuilder::PARAM_INT))
+			->set('original_location', $newPathFunction)
+			->where($query->expr()->eq('folder_id', $query->createNamedParameter($fromFolderId, IQueryBuilder::PARAM_INT)))
+			->andWhere($query->expr()->like('original_location', $query->createNamedParameter($this->connection->escapeLikeParameter($fromLocation) . '/%')));
+		$query->executeStatement();
+
+		// Update direct children
+		$query = $this->connection->getQueryBuilder();
+		$query->update('group_folders_trash')
+			->set('folder_id', $query->createNamedParameter($toFolderId, IQueryBuilder::PARAM_INT))
+			->set('original_location', $query->createNamedParameter($toLocation))
+			->where($query->expr()->eq('folder_id', $query->createNamedParameter($fromFolderId, IQueryBuilder::PARAM_INT)))
+			->andWhere($query->expr()->eq('original_location', $query->createNamedParameter($fromLocation, IQueryBuilder::PARAM_STR)));
+		$query->executeStatement();
+	}
 }