Add trashbin migrator to export and import trashbin data

apps/files_trashbin/composer/composer/autoload_classmap.php

@@ -43,4 +43,5 @@
     'OCA\\Files_Trashbin\\Trash\\TrashItem' => $baseDir . '/../lib/Trash/TrashItem.php',
     'OCA\\Files_Trashbin\\Trash\\TrashManager' => $baseDir . '/../lib/Trash/TrashManager.php',
     'OCA\\Files_Trashbin\\Trashbin' => $baseDir . '/../lib/Trashbin.php',
+    'OCA\\Files_Trashbin\\UserMigration\\TrashbinMigrator' => $baseDir . '/../lib/UserMigration/TrashbinMigrator.php',
 );

apps/files_trashbin/composer/composer/autoload_static.php

@@ -58,6 +58,7 @@ class ComposerStaticInitFiles_Trashbin
         'OCA\\Files_Trashbin\\Trash\\TrashItem' => __DIR__ . '/..' . '/../lib/Trash/TrashItem.php',
         'OCA\\Files_Trashbin\\Trash\\TrashManager' => __DIR__ . '/..' . '/../lib/Trash/TrashManager.php',
         'OCA\\Files_Trashbin\\Trashbin' => __DIR__ . '/..' . '/../lib/Trashbin.php',
+        'OCA\\Files_Trashbin\\UserMigration\\TrashbinMigrator' => __DIR__ . '/..' . '/../lib/UserMigration/TrashbinMigrator.php',
     );
 
     public static function getInitializer(ClassLoader $loader)

apps/files_trashbin/lib/AppInfo/Application.php

@@ -30,17 +30,20 @@
 use OCA\Files_Trashbin\Expiration;
 use OCA\Files_Trashbin\Trash\ITrashManager;
 use OCA\Files_Trashbin\Trash\TrashManager;
-use OCP\App\IAppManager;
+use OCA\Files_Trashbin\UserMigration\TrashbinMigrator;
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
 use OCP\AppFramework\Bootstrap\IRegistrationContext;
+use OCP\App\IAppManager;
 use OCP\ILogger;
 use OCP\IServerContainer;
 
 class Application extends App implements IBootstrap {
+	public const APP_ID = 'files_trashbin';
+
 	public function __construct(array $urlParams = []) {
-		parent::__construct('files_trashbin', $urlParams);
+		parent::__construct(self::APP_ID, $urlParams);
 	}
 
 	public function register(IRegistrationContext $context): void {
@@ -50,6 +53,8 @@ public function register(IRegistrationContext $context): void {
 		$context->registerServiceAlias(ITrashManager::class, TrashManager::class);
 		/** Register $principalBackend for the DAV collection */
 		$context->registerServiceAlias('principalBackend', Principal::class);
+
+		$context->registerUserMigrator(TrashbinMigrator::class);
 	}
 
 	public function boot(IBootContext $context): void {
@@ -65,10 +70,10 @@ public function boot(IBootContext $context): void {
 		\OCP\Util::connectHook('OC_Filesystem', 'delete', 'OCA\Files_Trashbin\Trashbin', 'ensureFileScannedHook');
 
 		\OCA\Files\App::getNavigationManager()->add(function () {
-			$l = \OC::$server->getL10N('files_trashbin');
+			$l = \OC::$server->getL10N(self::APP_ID);
 			return [
 				'id' => 'trashbin',
-				'appname' => 'files_trashbin',
+				'appname' => self::APP_ID,
 				'script' => 'list.php',
 				'order' => 50,
 				'name' => $l->t('Deleted files'),

apps/files_trashbin/lib/UserMigration/TrashbinMigrator.php

@@ -0,0 +1,137 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Côme Chilliet <[email protected]>
+ *
+ * @author Côme Chilliet <[email protected]>
+ *
+ * @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\Files_Trashbin\UserMigration;
+
+use OCA\Files_Trashbin\AppInfo\Application;
+use OCP\Files\Folder;
+use OCP\Files\IRootFolder;
+use OCP\Files\NotFoundException;
+use OCP\IDBConnection;
+use OCP\IUser;
+use OCP\UserMigration\IExportDestination;
+use OCP\UserMigration\IImportSource;
+use OCP\UserMigration\IMigrator;
+use OCP\UserMigration\TMigratorBasicVersionHandling;
+use OCP\UserMigration\UserMigrationException;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class TrashbinMigrator implements IMigrator {
+
+	use TMigratorBasicVersionHandling;
+
+	protected const PATH_FILES_FOLDER = Application::APP_ID.'/files';
+	protected const PATH_LOCATIONS_FILE = Application::APP_ID.'/locations.json';
+
+	protected IRootFolder $root;
+
+	protected IDBConnection $dbc;
+
+	public function __construct(
+		IRootFolder $rootFolder,
+		IDBConnection $dbc
+	) {
+		$this->root = $rootFolder;
+		$this->dbc = $dbc;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	public function export(IUser $user, IExportDestination $exportDestination, OutputInterface $output): void {
+		$output->writeln('Exporting trashbin into ' . Application::APP_ID . '…');
+
+		$uid = $user->getUID();
+
+		try {
+			$trashbinFolder = $this->root->get('/'.$uid.'/files_trashbin');
+			if (!$trashbinFolder instanceof Folder) {
+				throw new UserMigrationException('Could not export trashbin, /'.$uid.'/files_trashbin is not a folder');
+			}
+			$output->writeln("Exporting trashbin files…");
+			if ($exportDestination->copyFolder($trashbinFolder, static::PATH_FILES_FOLDER) === false) {
+				throw new UserMigrationException("Could not export trashbin.");
+			}
+			$originalLocations = \OCA\Files_Trashbin\Trashbin::getLocations($uid);
+			if ($exportDestination->addFileContents(static::PATH_LOCATIONS_FILE, json_encode($originalLocations)) === false) {
+				throw new UserMigrationException("Could not export trashbin.");
+			}
+		} catch (NotFoundException $e) {
+			$output->writeln("No trashbin to export…");
+		}
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	public function import(IUser $user, IImportSource $importSource, OutputInterface $output): void {
+		if ($importSource->getMigratorVersion(static::class) === null) {
+			$output->writeln('No version for ' . static::class . ', skipping import…');
+			return;
+		}
+
+		$output->writeln('Importing trashbin from ' . Application::APP_ID . '…');
+
+		$uid = $user->getUID();
+
+		if ($importSource->pathExists(static::PATH_FILES_FOLDER)) {
+			try {
+				$trashbinFolder = $this->root->get('/'.$uid.'/files_trashbin');
+				if (!$trashbinFolder instanceof Folder) {
+					throw new UserMigrationException('Could not import trashbin, /'.$uid.'/files_trashbin is not a folder');
+				}
+			} catch (NotFoundException $e) {
+				$trashbinFolder = $this->root->newFolder('/'.$uid.'/files_trashbin');
+			}
+			$output->writeln("Importing trashbin files…");
+			if ($importSource->copyToFolder($trashbinFolder, static::PATH_FILES_FOLDER) === false) {
+				throw new UserMigrationException("Could not import trashbin.");
+			}
+			$locations = json_decode($importSource->getFileContents(static::PATH_LOCATIONS_FILE), true, 512, JSON_THROW_ON_ERROR);
+			$qb = $this->dbc->getQueryBuilder();
+			$qb->insert('files_trash')
+				->values([
+					'id' => $qb->createParameter('id'),
+					'timestamp' => $qb->createParameter('timestamp'),
+					'location' => $qb->createParameter('location'),
+					'user' => $qb->createNamedParameter($uid),
+				]);
+			foreach ($locations as $id => $fileLocations) {
+				foreach ($fileLocations as $timestamp => $location) {
+					$qb
+						->setParameter('id', $id)
+						->setParameter('timestamp', $timestamp)
+						->setParameter('location', $location)
+						;
+
+					$qb->executeStatement();
+				}
+			}
+		} else {
+			$output->writeln("No trashbin to import…");
+		}
+	}
+}