1 files changed, 64 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..340e878a912
--- /dev/null
+++ b/apps/dav/lib/Command/RemoveInvalidShares.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+
+/**
+ * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2018 ownCloud GmbH
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+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 {
+	public function __construct(
+		private IDBConnection $connection,
+		private Principal $principalBackend,
+	) {
+		parent::__construct();
+	}
+
+	protected function configure(): void {
+		$this
+			->setName('dav:remove-invalid-shares')
+			->setDescription('Remove invalid dav shares');
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output): int {
+		$query = $this->connection->getQueryBuilder();
+		$result = $query->selectDistinct('principaluri')
+			->from('dav_shares')
+			->executeQuery();
+
+		while ($row = $result->fetch()) {
+			$principaluri = $row['principaluri'];
+			$p = $this->principalBackend->getPrincipalByPath($principaluri);
+			if ($p === null) {
+				$this->deleteSharesForPrincipal($principaluri);
+			}
+		}
+
+		$result->closeCursor();
+		return self::SUCCESS;
+	}
+
+	/**
+	 * @param string $principaluri
+	 */
+	private function deleteSharesForPrincipal($principaluri): void {
+		$delete = $this->connection->getQueryBuilder();
+		$delete->delete('dav_shares')
+			->where($delete->expr()->eq('principaluri', $delete->createNamedParameter($principaluri)));
+		$delete->executeStatement();
+	}
+}