From 71ef42606f18e5397bb0d7b1983d12cc2e9cf90a Mon Sep 17 00:00:00 2001
From: Damian Glinkowski <damianglinkowski@extalion.com>
Date: Fri, 12 Jun 2020 19:37:13 +0200
Subject: [PATCH] Fix create SimpleFile with empty content

After that change https://github.com/nextcloud/server/pull/19493 where
you have to provide content to method `newFile` is a bug with empty `''`
content.

Php function `file_put_contents` will returns the numbers of bytes that
written to the file, or `FALSE` on failure
https://www.php.net/manual/en/function.file-put-contents.php

So for empty `''` content it will return `0` which is `true` for this
statement:

```
if (!$result) {
    throw new NotPermittedException('Could not create path');
}
```

From now empty content will not throws an exception.
---
 lib/private/Files/Node/Folder.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/private/Files/Node/Folder.php b/lib/private/Files/Node/Folder.php
index d9639e9f1abf9..49e5b39ebb6d1 100644
--- a/lib/private/Files/Node/Folder.php
+++ b/lib/private/Files/Node/Folder.php
@@ -185,6 +185,9 @@ public function newFile($path, $content = null) {
 			$this->sendHooks(['preWrite', 'preCreate'], [$nonExisting]);
 			if ($content !== null) {
 				$result = $this->view->file_put_contents($fullPath, $content);
+				if ($content === '' && $result === 0) {
+					$result = true;
+				}
 			} else {
 				$result = $this->view->touch($fullPath);
 			}