From 054083b9cd13244842f8664601d8566593f9737d Mon Sep 17 00:00:00 2001
From: Robin Appelman <icewind@owncloud.com>
Date: Tue, 10 Jun 2014 15:37:43 +0200
Subject: [PATCH] add some comments

---
 lib/private/files/cache/scanner.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/private/files/cache/scanner.php b/lib/private/files/cache/scanner.php
index 1f67ce0062..3f681e5731 100644
--- a/lib/private/files/cache/scanner.php
+++ b/lib/private/files/cache/scanner.php
@@ -105,6 +105,8 @@ class Scanner extends BasicEmitter {
 					$parent = '';
 				}
 				$parentId = $this->cache->getId($parent);
+
+				// scan the parent if it's not in the cache (id -1) and the current file is not the root folder
 				if ($file and $parentId === -1) {
 					$parentData = $this->scanFile($parent);
 					$parentId = $parentData['fileid'];