1 files changed, 133 insertions, 0 deletions
diff --git a/apps/dav/lib/CalDAV/Trashbin/DeletedCalendarObjectsCollection.php b/apps/dav/lib/CalDAV/Trashbin/DeletedCalendarObjectsCollection.php
new file mode 100644
index 00000000000..f75e19689f1
--- /dev/null
+++ b/apps/dav/lib/CalDAV/Trashbin/DeletedCalendarObjectsCollection.php
@@ -0,0 +1,133 @@
+<?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 OCA\DAV\CalDAV\CalDavBackend;
+use Sabre\CalDAV\ICalendarObjectContainer;
+use Sabre\DAV\Exception\BadRequest;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\Exception\NotImplemented;
+use Sabre\DAVACL\ACLTrait;
+use Sabre\DAVACL\IACL;
+use function array_map;
+use function implode;
+use function preg_match;
+
+class DeletedCalendarObjectsCollection implements ICalendarObjectContainer, IACL {
+	use ACLTrait;
+
+	public const NAME = 'objects';
+
+	public function __construct(
+		protected CalDavBackend $caldavBackend,
+		/** @var mixed[] */
+		private array $principalInfo,
+	) {
+	}
+
+	/**
+	 * @see \OCA\DAV\CalDAV\Trashbin\DeletedCalendarObjectsCollection::calendarQuery
+	 */
+	public function getChildren() {
+		throw new NotImplemented();
+	}
+
+	public function getChild($name) {
+		if (!preg_match("/(\d+)\\.ics/", $name, $matches)) {
+			throw new NotFound();
+		}
+
+		$data = $this->caldavBackend->getCalendarObjectById(
+			$this->principalInfo['uri'],
+			(int)$matches[1],
+		);
+
+		// If the object hasn't been deleted yet then we don't want to find it here
+		if ($data === null) {
+			throw new NotFound();
+		}
+		if (!isset($data['deleted_at'])) {
+			throw new BadRequest('The calendar object you\'re trying to restore is not marked as deleted');
+		}
+
+		return new DeletedCalendarObject(
+			$this->getRelativeObjectPath($data),
+			$data,
+			$this->principalInfo['uri'],
+			$this->caldavBackend
+		);
+	}
+
+	public function createFile($name, $data = null) {
+		throw new Forbidden();
+	}
+
+	public function createDirectory($name) {
+		throw new Forbidden();
+	}
+
+	public function childExists($name) {
+		try {
+			$this->getChild($name);
+		} catch (NotFound $e) {
+			return false;
+		}
+
+		return true;
+	}
+
+	public function delete() {
+		throw new Forbidden();
+	}
+
+	public function getName(): string {
+		return self::NAME;
+	}
+
+	public function setName($name) {
+		throw new Forbidden();
+	}
+
+	public function getLastModified(): int {
+		return 0;
+	}
+
+	public function calendarQuery(array $filters) {
+		return array_map(function (array $calendarObjectInfo) {
+			return $this->getRelativeObjectPath($calendarObjectInfo);
+		}, $this->caldavBackend->getDeletedCalendarObjectsByPrincipal($this->principalInfo['uri']));
+	}
+
+	private function getRelativeObjectPath(array $calendarInfo): string {
+		return implode(
+			'.',
+			[$calendarInfo['id'], 'ics'],
+		);
+	}
+
+	public function getOwner() {
+		return $this->principalInfo['uri'];
+	}
+
+	public function getACL(): array {
+		return [
+			[
+				'privilege' => '{DAV:}read',
+				'principal' => $this->getOwner(),
+				'protected' => true,
+			],
+			[
+				'privilege' => '{DAV:}unbind',
+				'principal' => '{DAV:}owner',
+				'protected' => true,
+			]
+		];
+	}
+}