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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\Config\Resource;
  13  
  14  /**
  15   * DirectoryResource represents a resources stored in a subdirectory tree.
  16   *
  17   * @author Fabien Potencier <fabien@symfony.com>
  18   */
  19  class DirectoryResource implements ResourceInterface, \Serializable
  20  {
  21      private $resource;
  22      private $pattern;
  23  
  24      /**
  25       * Constructor.
  26       *
  27       * @param string      $resource The file path to the resource
  28       * @param string|null $pattern  A pattern to restrict monitored files
  29       */
  30      public function __construct($resource, $pattern = null)
  31      {
  32          $this->resource = $resource;
  33          $this->pattern = $pattern;
  34      }
  35  
  36      /**
  37       * {@inheritdoc}
  38       */
  39      public function __toString()
  40      {
  41          return md5(serialize(array($this->resource, $this->pattern)));
  42      }
  43  
  44      /**
  45       * {@inheritdoc}
  46       */
  47      public function getResource()
  48      {
  49          return $this->resource;
  50      }
  51  
  52      /**
  53       * Returns the pattern to restrict monitored files.
  54       *
  55       * @return string|null
  56       */
  57      public function getPattern()
  58      {
  59          return $this->pattern;
  60      }
  61  
  62      /**
  63       * {@inheritdoc}
  64       */
  65      public function isFresh($timestamp)
  66      {
  67          if (!is_dir($this->resource)) {
  68              return false;
  69          }
  70  
  71          $newestMTime = filemtime($this->resource);
  72          foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($this->resource), \RecursiveIteratorIterator::SELF_FIRST) as $file) {
  73              // if regex filtering is enabled only check matching files
  74              if ($this->pattern && $file->isFile() && !preg_match($this->pattern, $file->getBasename())) {
  75                  continue;
  76              }
  77  
  78              // always monitor directories for changes, except the .. entries
  79              // (otherwise deleted files wouldn't get detected)
  80              if ($file->isDir() && '/..' === substr($file, -3)) {
  81                  continue;
  82              }
  83  
  84              $newestMTime = max($file->getMTime(), $newestMTime);
  85          }
  86  
  87          return $newestMTime < $timestamp;
  88      }
  89  
  90      public function serialize()
  91      {
  92          return serialize(array($this->resource, $this->pattern));
  93      }
  94  
  95      public function unserialize($serialized)
  96      {
  97          list($this->resource, $this->pattern) = unserialize($serialized);
  98      }
  99  }