Merge pull request #14693 from nextcloud/trashbin-restore-readonly-target

dont try to restore a trashbin item to a readonly target

apps/files_trashbin/lib/Trashbin.php

@@ -48,6 +48,7 @@ use OCA\Files_Trashbin\Command\Expire;
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\NotFoundException;
+use OCP\Files\NotPermittedException;
 use OCP\User;
 
 class Trashbin {
@@ -414,6 +415,9 @@ class Trashbin {
 		$mtime = $view->filemtime($source);
 
 		// restore file
+		if (!$view->isCreatable(dirname($target))) {
+			throw new NotPermittedException("Can't restore trash item because the target folder is not writable");
+		}
 		$restoreResult = $view->rename($source, $target);
 
 		// handle the restore result