src/Util/FileSystem.php

   1 <?php
   2
   3 namespace Friendica\Util;
   4
   5 /**
   6  * Util class for filesystem manipulation
   7  */
   8 final class FileSystem
   9 {
  10         /**
  11          * @var string a error message
  12          */
  13         private $errorMessage;
  14
  15         /**
  16          * Creates a directory based on a file, which gets accessed
  17          *
  18          * @param string $file The file
  19          *
  20          * @return string The directory name (empty if no directory is found, like urls)
  21          */
  22         public function createDir(string $file)
  23         {
  24                 $dirname = null;
  25                 $pos = strpos($file, '://');
  26
  27                 if (!$pos) {
  28                         $dirname = realpath(dirname($file));
  29                 }
  30
  31                 if (substr($file, 0, 7) === 'file://') {
  32                         $dirname = realpath(dirname(substr($file, 7)));
  33                 }
  34
  35                 if (isset($dirname) && !is_dir($dirname)) {
  36                         set_error_handler([$this, 'customErrorHandler']);
  37                         $status = mkdir($dirname, 0777, true);
  38                         restore_error_handler();
  39
  40                         if (!$status && !is_dir($dirname)) {
  41                                 throw new \UnexpectedValueException(sprintf('Directory "%s" cannot get created: ' . $this->errorMessage, $dirname));
  42                         }
  43
  44                         return $dirname;
  45                 } elseif (isset($dirname) && is_dir($dirname)) {
  46                         return $dirname;
  47                 } else {
  48                         return '';
  49                 }
  50         }
  51
  52         /**
  53          * Creates a stream based on a URL (could be a local file or a real URL)
  54          *
  55          * @param string $url The file/url
  56          *
  57          * @return false|resource the open stream ressource
  58          */
  59         public function createStream(string $url)
  60         {
  61                 $directory = $this->createDir($url);
  62                 set_error_handler([$this, 'customErrorHandler']);
  63                 if (!empty($directory)) {
  64                         $url = $directory . DIRECTORY_SEPARATOR . pathinfo($url, PATHINFO_BASENAME);
  65                 }
  66
  67                 $stream = fopen($url, 'ab');
  68                 restore_error_handler();
  69
  70                 if (!is_resource($stream)) {
  71                         throw new \UnexpectedValueException(sprintf('The stream or file "%s" could not be opened: ' . $this->errorMessage, $url));
  72                 }
  73
  74                 return $stream;
  75         }
  76
  77         private function customErrorHandler($code, $msg)
  78         {
  79                 $this->errorMessage = preg_replace('{^(fopen|mkdir)\(.*?\): }', '', $msg);
  80         }
  81 }