Add a trashbin for calendars and calendar objects

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

1 files changed, 80 insertions, 0 deletions

diff --git a/apps/dav/lib/CalDAV/RetentionService.php b/apps/dav/lib/CalDAV/RetentionService.php
new file mode 100644
index 00000000000..934e6f71530
--- /dev/null
+++ b/apps/dav/lib/CalDAV/RetentionService.php
@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * @copyright 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @author 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @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\DAV\CalDAV;
+
+use OCA\DAV\AppInfo\Application;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\IConfig;
+use function max;
+
+class RetentionService {
+	public const RETENTION_CONFIG_KEY = 'calendarRetentionObligation';
+	private const DEFAULT_RETENTION_SECONDS = 30 * 24 * 60 * 60;
+
+	/** @var IConfig */
+	private $config;
+
+	/** @var ITimeFactory */
+	private $time;
+
+	/** @var CalDavBackend */
+	private $calDavBackend;
+
+	public function __construct(IConfig $config,
+								ITimeFactory $time,
+								CalDavBackend $calDavBackend) {
+		$this->config = $config;
+		$this->time = $time;
+		$this->calDavBackend = $calDavBackend;
+	}
+
+	public function cleanUp(): void {
+		$retentionTime = max(
+			(int) $this->config->getAppValue(
+				Application::APP_ID,
+				self::RETENTION_CONFIG_KEY,
+				(string) self::DEFAULT_RETENTION_SECONDS
+			),
+			0 // Just making sure we don't delete things in the future when a negative number is passed
+		);
+		$now = $this->time->getTime();
+
+		$calendars = $this->calDavBackend->getDeletedCalendars($now - $retentionTime);
+		foreach ($calendars as $calendar) {
+			$this->calDavBackend->deleteCalendar($calendar['id'], true);
+		}
+
+		$objects = $this->calDavBackend->getDeletedCalendarObjects($now - $retentionTime);
+		foreach ($objects as $object) {
+			$this->calDavBackend->deleteCalendarObject(
+				$object['calendarid'],
+				$object['uri'],
+				$object['calendartype'],
+				true
+			);
+		}
+	}
+}