Add checks & realpath() usage

[friendica.git] / src / Util / FileSystem.php

diff --git a/src/Util/FileSystem.php b/src/Util/FileSystem.php
new file mode 100644 (file)
index 0000000..33e0478
--- /dev/null
+++ b/src/Util/FileSystem.php
@@ -0,0 +1,64 @@
+<?php
+
+namespace Friendica\Util;
+
+final class FileSystem
+{
+       /**
+        * @var string a error message
+        */
+       private $errorMessage;
+
+       public function createDir(string $file)
+       {
+               $dirname = null;
+               $pos = strpos($file, '://');
+
+               if (!$pos) {
+                       $dirname = realpath(dirname($file));
+               }
+
+               if (substr($file, 0, 7) === 'file://') {
+                       $dirname = realpath(dirname(substr($file, 7)));
+               }
+
+               if (isset($dirname) && !is_dir($dirname)) {
+                       set_error_handler([$this, 'customErrorHandler']);
+                       $status = mkdir($dirname, 0777, true);
+                       restore_error_handler();
+
+                       if (!$status && !is_dir($dirname)) {
+                               throw new \UnexpectedValueException(sprintf('Directory "%s" cannot get created: ' . $this->errorMessage, $dirname));
+                       }
+
+                       return $dirname;
+               } elseif (isset($dirname) && is_dir($dirname)) {
+                       return $dirname;
+               } else {
+                       return '';
+               }
+       }
+
+       public function createStream(string $url)
+       {
+               $directory = $this->createDir($url);
+               set_error_handler([$this, 'customErrorHandler']);
+               if (!empty($directory)) {
+                       $url = $directory . DIRECTORY_SEPARATOR . pathinfo($url, PATHINFO_BASENAME);
+               }
+
+               $stream = fopen($url, 'ab');
+               restore_error_handler();
+
+               if (!is_resource($stream)) {
+                       throw new \UnexpectedValueException(sprintf('The stream or file "%s" could not be opened: ' . $this->errorMessage, $url));
+               }
+
+               return $stream;
+       }
+
+       private function customErrorHandler($code, $msg)
+       {
+               $this->errorMessage = preg_replace('{^(fopen|mkdir)\(.*?\): }', '', $msg);
+       }
+}