/htdocs/symfony/2.0.0pr4/src/vendor/symfony/src/Symfony/Component/Finder/Iterator/FilenameFilterIterator.php

<?php

namespace Symfony\Component\Finder\Iterator;

use Symfony\Component\Finder\Glob;

/*
 * This file is part of the Symfony framework.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

/**
 * FilenameFilterIterator filters files by patterns (a regexp, a glob, or a string).
 *
 * @author Fabien Potencier <fabien.potencier@symfony-project.com>
 */
class FilenameFilterIterator extends \FilterIterator
{
    protected $matchRegexps;
    protected $noMatchRegexps;

    /**
     * Constructor.
     *
     * @param \Iterator $iterator        The Iterator to filter
     * @param array     $matchPatterns   An array of patterns that need to match
     * @param array     $noMatchPatterns An array of patterns that need to not match
     */
    public function __construct(\Iterator $iterator, array $matchPatterns, array $noMatchPatterns)
    {
        $this->matchRegexps = array();
        foreach ($matchPatterns as $pattern) {
            $this->matchRegexps[] = $this->toRegex($pattern);
        }

        $this->noMatchRegexps = array();
        foreach ($noMatchPatterns as $pattern) {
            $this->noMatchRegexps[] = $this->toRegex($pattern);
        }

        parent::__construct($iterator);
    }

    /**
     * Filters the iterator values.
     *
     * @return Boolean true if the value should be kept, false otherwise
     */
    public function accept()
    {
        $fileinfo = $this->getInnerIterator()->current();

        // should at least match one rule
        if ($this->matchRegexps) {
            $match = false;
            foreach ($this->matchRegexps as $regex) {
                if (preg_match($regex, $fileinfo->getFilename())) {
                    $match = true;
                    break;
                }
            }
        } else {
            $match = true;
        }

        // should at least not match one rule to exclude
        if ($this->noMatchRegexps) {
            $exclude = false;
            foreach ($this->noMatchRegexps as $regex) {
                if (preg_match($regex, $fileinfo->getFilename())) {
                    $exclude = true;
                    break;
                }
            }
        } else {
            $exclude = false;
        }

        return $match && !$exclude;
    }

    protected function toRegex($str)
    {
        if (preg_match('/^([^a-zA-Z0-9\\\\]).+?\\1[ims]?$/', $str)) {
            return $str;
        }

        return Glob::toRegex($str);
    }
}