feat(dav): Support parentid node property

Signed-off-by: Christopher Ng <[email protected]>

apps/dav/lib/Connector/Sabre/FilesPlugin.php

@@ -62,6 +62,7 @@ class FilesPlugin extends ServerPlugin {
 	public const SUBFILE_COUNT_PROPERTYNAME = '{http://nextcloud.org/ns}contained-file-count';
 	public const FILE_METADATA_PREFIX = '{http://nextcloud.org/ns}metadata-';
 	public const HIDDEN_PROPERTYNAME = '{http://nextcloud.org/ns}hidden';
+	public const PARENTID_PROPERTYNAME = '{http://nextcloud.org/ns}parentid';
 
 	/** Reference to main server object */
 	private ?Server $server = null;
@@ -123,6 +124,7 @@ public function initialize(Server $server) {
 		$server->protectedProperties[] = self::MOUNT_TYPE_PROPERTYNAME;
 		$server->protectedProperties[] = self::IS_ENCRYPTED_PROPERTYNAME;
 		$server->protectedProperties[] = self::SHARE_NOTE;
+		$server->protectedProperties[] = self::PARENTID_PROPERTYNAME;
 
 		// normally these cannot be changed (RFC4918), but we want them modifiable through PROPPATCH
 		$allowedProperties = ['{DAV:}getetag'];
@@ -386,6 +388,10 @@ public function handleGetProperties(PropFind $propFind, \Sabre\DAV\INode $node)
 			$propFind->handle(self::DISPLAYNAME_PROPERTYNAME, function () use ($node) {
 				return $node->getName();
 			});
+
+			$propFind->handle(self::PARENTID_PROPERTYNAME, function () use ($node) {
+				return $node->getNode()->getParentId();
+			});
 		}
 
 		if ($node instanceof \OCA\DAV\Connector\Sabre\File) {