JpegoptimFilter.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\Filter;

use Assetic\Asset\AssetInterface;
use Assetic\Exception\FilterException;
use Symfony\Component\Process\ProcessBuilder;

/**
 * Runs assets through Jpegoptim.
 *
 * @link   http://www.kokkonen.net/tjko/projects.html
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
class JpegoptimFilter implements FilterInterface {
  private $jpegoptimBin;
  private $stripAll;
  private $max;

  /**
   * Constructor.
   *
   * @param string $jpegoptimBin Path to the jpegoptim binary
   */
  public function __construct($jpegoptimBin = '/usr/bin/jpegoptim') {
    $this->jpegoptimBin = $jpegoptimBin;
  }
  public function setStripAll($stripAll) {
    $this->stripAll = $stripAll;
  }
  public function setMax($max) {
    $this->max = $max;
  }
  public function filterLoad(AssetInterface $asset) {
  }
  public function filterDump(AssetInterface $asset) {
    $pb = new ProcessBuilder(array(
      $this->jpegoptimBin,
    ));
    if ($this->stripAll) {
      $pb
        ->add('--strip-all');
    }
    if ($this->max) {
      $pb
        ->add('--max=' . $this->max);
    }
    $pb
      ->add($input = tempnam(sys_get_temp_dir(), 'assetic_jpegoptim'));
    file_put_contents($input, $asset
      ->getContent());
    $proc = $pb
      ->getProcess();
    $proc
      ->run();
    if (false !== strpos($proc
      ->getOutput(), 'ERROR')) {
      unlink($input);
      throw FilterException::fromProcess($proc)
        ->setInput($asset
        ->getContent());
    }
    $asset
      ->setContent(file_get_contents($input));
    unlink($input);
  }

}