fix(trashbin): Fix errors in the log on MOVE operations

dirname will return '.' for files at the root, which will cause an
 Exception that gets logged.
Instead use \Sabre\Uri\split like other sabre plugins, to get an empty
 string for root directory.

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

apps/files_trashbin/lib/Sabre/TrashbinPlugin.php

@@ -20,6 +20,7 @@ use Sabre\DAV\Server;
 use Sabre\DAV\ServerPlugin;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
+use Sabre\Uri;
 
 class TrashbinPlugin extends ServerPlugin {
 	public const TRASHBIN_FILENAME = '{http://nextcloud.org/ns}trashbin-filename';
@@ -146,7 +147,8 @@ class TrashbinPlugin extends ServerPlugin {
 	public function beforeMove(string $sourcePath, string $destinationPath): bool {
 		try {
 			$node = $this->server->tree->getNodeForPath($sourcePath);
-			$destinationNodeParent = $this->server->tree->getNodeForPath(dirname($destinationPath));
+			[$destinationDir, ] = Uri\split($destinationPath);
+			$destinationNodeParent = $this->server->tree->getNodeForPath($destinationDir);
 		} catch (\Sabre\DAV\Exception $e) {
 			\OCP\Server::get(LoggerInterface::class)
 				->error($e->getMessage(), ['app' => 'files_trashbin', 'exception' => $e]);