1 files changed, 91 insertions, 0 deletions
diff --git a/lib/private/Preview/BackgroundCleanupJob.php b/lib/private/Preview/BackgroundCleanupJob.php
new file mode 100644
index 00000000000..25bf354e28b
--- /dev/null
+++ b/lib/private/Preview/BackgroundCleanupJob.php
@@ -0,0 +1,91 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Preview;
+
+use OC\BackgroundJob\TimedJob;
+use OC\Files\AppData\Factory;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\Files\NotFoundException;
+use OCP\Files\NotPermittedException;
+use OCP\IDBConnection;
+
+class BackgroundCleanupJob extends TimedJob {
+
+	/** @var IDBConnection */
+	private $connection;
+
+	/** @var Factory */
+	private $appDataFactory;
+
+	/** @var bool */
+	private $isCLI;
+
+	public function __construct(IDBConnection $connection,
+								Factory $appDataFactory,
+								bool $isCLI) {
+		// Run at most once an hour
+		$this->setInterval(3600);
+
+		$this->connection = $connection;
+		$this->appDataFactory = $appDataFactory;
+		$this->isCLI = $isCLI;
+	}
+
+	public function run($argument) {
+		$previews = $this->appDataFactory->get('preview');
+
+		$previewFodlerId = $previews->getId();
+
+		$qb = $this->connection->getQueryBuilder();
+		$qb->select('a.name')
+			->from('filecache', 'a')
+			->leftJoin('a', 'filecache', 'b', $qb->expr()->eq(
+				$qb->expr()->castColumn('a.name', IQueryBuilder::PARAM_INT), 'b.fileid'
+			))
+			->where(
+				$qb->expr()->isNull('b.fileid')
+			)->andWhere(
+				$qb->expr()->eq('a.parent', $qb->createNamedParameter($previewFodlerId))
+			);
+
+		if (!$this->isCLI) {
+			$qb->setMaxResults(10);
+		}
+
+		$cursor = $qb->execute();
+
+		while ($row = $cursor->fetch()) {
+			try {
+				$preview = $previews->getFolder($row['name']);
+				$preview->delete();
+			} catch (NotFoundException $e) {
+				// continue
+			} catch (NotPermittedException $e) {
+				// continue
+			}
+		}
+
+		$cursor->closeCursor();
+	}
+}