EnsureFilterWorker.php

<?php

/*
 * This file is part of the Assetic package, an OpenSky project.
 *
 * (c) 2010-2012 OpenSky Project Inc
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Assetic\Factory\Worker;

use Assetic\Asset\AssetInterface;
use Assetic\Filter\FilterInterface;

/**
 * Applies a filter to an asset based on a source and/or target path match.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 * @todo A better asset-matcher mechanism
 */
class EnsureFilterWorker implements WorkerInterface {
  const CHECK_SOURCE = 1;
  const CHECK_TARGET = 2;
  private $pattern;
  private $filter;
  private $flags;

  /**
   * Constructor.
   *
   * @param string          $pattern A regex for checking the asset's target URL
   * @param FilterInterface $filter  A filter to apply if the regex matches
   * @param integer         $flags   Flags for what to check
   */
  public function __construct($pattern, FilterInterface $filter, $flags = null) {
    if (null === $flags) {
      $flags = self::CHECK_SOURCE | self::CHECK_TARGET;
    }
    $this->pattern = $pattern;
    $this->filter = $filter;
    $this->flags = $flags;
  }
  public function process(AssetInterface $asset) {
    if (self::CHECK_SOURCE === (self::CHECK_SOURCE & $this->flags) && preg_match($this->pattern, $asset
      ->getSourcePath()) || self::CHECK_TARGET === (self::CHECK_TARGET & $this->flags) && preg_match($this->pattern, $asset
      ->getTargetPath())) {
      $asset
        ->ensureFilter($this->filter);
    }
  }

}