1 files changed, 114 insertions, 0 deletions
diff --git a/apps/dav/lib/CalDAV/Trashbin/Plugin.php b/apps/dav/lib/CalDAV/Trashbin/Plugin.php
new file mode 100644
index 00000000000..6f58b1f3110
--- /dev/null
+++ b/apps/dav/lib/CalDAV/Trashbin/Plugin.php
@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\DAV\CalDAV\Trashbin;
+
+use Closure;
+use DateTimeImmutable;
+use DateTimeInterface;
+use OCA\DAV\CalDAV\Calendar;
+use OCA\DAV\CalDAV\RetentionService;
+use OCP\IRequest;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\INode;
+use Sabre\DAV\PropFind;
+use Sabre\DAV\Server;
+use Sabre\DAV\ServerPlugin;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+use function array_slice;
+use function implode;
+
+class Plugin extends ServerPlugin {
+	public const PROPERTY_DELETED_AT = '{http://nextcloud.com/ns}deleted-at';
+	public const PROPERTY_CALENDAR_URI = '{http://nextcloud.com/ns}calendar-uri';
+	public const PROPERTY_RETENTION_DURATION = '{http://nextcloud.com/ns}trash-bin-retention-duration';
+
+	/** @var bool */
+	private $disableTrashbin;
+
+	/** @var Server */
+	private $server;
+
+	public function __construct(
+		IRequest $request,
+		private RetentionService $retentionService,
+	) {
+		$this->disableTrashbin = $request->getHeader('X-NC-CalDAV-No-Trashbin') === '1';
+	}
+
+	public function initialize(Server $server): void {
+		$this->server = $server;
+		$server->on('beforeMethod:*', [$this, 'beforeMethod']);
+		$server->on('propFind', Closure::fromCallable([$this, 'propFind']));
+	}
+
+	public function beforeMethod(RequestInterface $request, ResponseInterface $response): void {
+		if (!$this->disableTrashbin) {
+			return;
+		}
+
+		$path = $request->getPath();
+		$pathParts = explode('/', ltrim($path, '/'));
+		if (\count($pathParts) < 3) {
+			// We are looking for a path like calendars/username/calendarname
+			return;
+		}
+
+		// $calendarPath will look like calendars/username/calendarname
+		$calendarPath = implode(
+			'/',
+			array_slice($pathParts, 0, 3)
+		);
+		try {
+			$calendar = $this->server->tree->getNodeForPath($calendarPath);
+			if (!($calendar instanceof Calendar)) {
+				// This is odd
+				return;
+			}
+
+			/** @var Calendar $calendar */
+			$calendar->disableTrashbin();
+		} catch (NotFound $ex) {
+			return;
+		}
+	}
+
+	private function propFind(
+		PropFind $propFind,
+		INode $node): void {
+		if ($node instanceof DeletedCalendarObject) {
+			$propFind->handle(self::PROPERTY_DELETED_AT, function () use ($node) {
+				$ts = $node->getDeletedAt();
+				if ($ts === null) {
+					return null;
+				}
+
+				return (new DateTimeImmutable())
+					->setTimestamp($ts)
+					->format(DateTimeInterface::ATOM);
+			});
+			$propFind->handle(self::PROPERTY_CALENDAR_URI, function () use ($node) {
+				return $node->getCalendarUri();
+			});
+		}
+		if ($node instanceof TrashbinHome) {
+			$propFind->handle(self::PROPERTY_RETENTION_DURATION, function () use ($node) {
+				return $this->retentionService->getDuration();
+			});
+		}
+	}
+
+	public function getFeatures(): array {
+		return ['nc-calendar-trashbin'];
+	}
+
+	public function getPluginName(): string {
+		return 'nc-calendar-trashbin';
+	}
+}