1 files changed, 82 insertions, 0 deletions
diff --git a/apps/dav/lib/Command/RemoveInvalidShares.php b/apps/dav/lib/Command/RemoveInvalidShares.php
new file mode 100644
index 00000000000..12a5ee43d47
--- /dev/null
+++ b/apps/dav/lib/Command/RemoveInvalidShares.php
@@ -0,0 +1,82 @@
+<?php
+declare(strict_types=1);
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2018, ownCloud GmbH
+ * @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 OCA\DAV\Command;
+
+use OCA\DAV\Connector\Sabre\Principal;
+use OCP\IDBConnection;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Class RemoveInvalidShares - removes shared calendars and addressbook which
+ * have no matching principal. Happened because of a bug in the calendar app.
+ */
+class RemoveInvalidShares extends Command {
+
+	/** @var IDBConnection */
+	private $connection;
+	/** @var Principal */
+	private $principalBackend;
+
+	public function __construct(IDBConnection $connection,
+								Principal $principalBackend) {
+		parent::__construct();
+
+		$this->connection = $connection;
+		$this->principalBackend = $principalBackend;
+	}
+
+	protected function configure() {
+		$this
+			->setName('dav:remove-invalid-shares')
+			->setDescription('Remove invalid dav shares');
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output) {
+		$query = $this->connection->getQueryBuilder();
+		$result = $query->selectDistinct('principaluri')
+			->from('dav_shares')
+			->execute();
+
+		while($row = $result->fetch()) {
+			$principaluri = $row['principaluri'];
+			$p = $this->principalBackend->getPrincipalByPath($principaluri);
+			if ($p === null) {
+				$this->deleteSharesForPrincipal($principaluri);
+			}
+		}
+
+		$result->closeCursor();
+	}
+
+	/**
+	 * @param string $principaluri
+	 */
+	private function deleteSharesForPrincipal($principaluri) {
+		$delete = $this->connection->getQueryBuilder();
+		$delete->delete('dav_shares')
+			->where($delete->expr()->eq('principaluri', $delete->createNamedParameter($principaluri)));
+		$delete->execute();
+	}
+}