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\Finder\Iterator;
13: 
14: /**
15:  * CustomFilterIterator filters files by applying anonymous functions.
16:  *
17:  * The anonymous function receives a \SplFileInfo and must return false
18:  * to remove files.
19:  *
20:  * @author Fabien Potencier <fabien@symfony.com>
21:  */
22: class CustomFilterIterator extends FilterIterator
23: {
24:     private $filters = array();
25: 
26:     /**
27:      * Constructor.
28:      *
29:      * @param \Iterator $iterator The Iterator to filter
30:      * @param array     $filters  An array of PHP callbacks
31:      *
32:      * @throws \InvalidArgumentException
33:      */
34:     public function __construct(\Iterator $iterator, array $filters)
35:     {
36:         foreach ($filters as $filter) {
37:             if (!is_callable($filter)) {
38:                 throw new \InvalidArgumentException('Invalid PHP callback.');
39:             }
40:         }
41:         $this->filters = $filters;
42: 
43:         parent::__construct($iterator);
44:     }
45: 
46:     /**
47:      * Filters the iterator values.
48:      *
49:      * @return Boolean true if the value should be kept, false otherwise
50:      */
51:     public function accept()
52:     {
53:         $fileinfo = $this->current();
54: 
55:         foreach ($this->filters as $filter) {
56:             if (false === call_user_func($filter, $fileinfo)) {
57:                 return false;
58:             }
59:         }
60: 
61:         return true;
62:     }
63: }
64: