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

    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 $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      * Returns a string representation of the Resource.

    38      *

    39      * @return string A string representation of the Resource

    40      */

    41     public function __toString()

    42     {

    43         return (string) $this->resource;

    44     }

    45 

    46     /**

    47      * Returns the resource tied to this Resource.

    48      *

    49      * @return mixed The resource

    50      */

    51     public function getResource()

    52     {

    53         return $this->resource;

    54     }

    55 

    56     /**

    57      * Returns true if the resource has not been updated since the given timestamp.

    58      *

    59      * @param integer $timestamp The last time the resource was loaded

    60      *

    61      * @return Boolean true if the resource has not been updated, false otherwise

    62      */

    63     public function isFresh($timestamp)

    64     {

    65         if (!file_exists($this->resource)) {

    66             return false;

    67         }

    68 

    69         $newestMTime = filemtime($this->resource);

    70         foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($this->resource), \RecursiveIteratorIterator::SELF_FIRST) as $file) {

    71             // if regex filtering is enabled only check matching files

    72             if ($this->pattern && $file->isFile() && !preg_match($this->pattern, $file->getBasename())) {

    73                 continue;

    74             }

    75 

    76             // always monitor directories for changes, except the .. entries

    77             // (otherwise deleted files wouldn't get detected)

    78             if ($file->isDir() && '/..' === substr($file, -3)) {

    79                 continue;

    80             }

    81 

    82             $newestMTime = max($file->getMTime(), $newestMTime);

    83         }

    84 

    85         return $newestMTime < $timestamp;

    86     }

    87 }