DartFilter.php

<?php

/*
 * This file is part of the Assetic package, an OpenSky project.
 *
 * (c) 2010-2013 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;

/**
 * Compiles Dart into Javascript.
 *
 * @link http://dartlang.org/
 */
class DartFilter extends BaseProcessFilter {
  private $dartBin;
  public function __construct($dartBin = '/usr/bin/dart2js') {
    $this->dartBin = $dartBin;
  }
  public function filterLoad(AssetInterface $asset) {
    $input = tempnam(sys_get_temp_dir(), 'assetic_dart');
    $output = tempnam(sys_get_temp_dir(), 'assetic_dart');
    file_put_contents($input, $asset
      ->getContent());
    $pb = $this
      ->createProcessBuilder()
      ->add($this->dartBin)
      ->add('-o' . $output)
      ->add($input);
    $proc = $pb
      ->getProcess();
    $code = $proc
      ->run();
    unlink($input);
    if (0 !== $code) {
      if (file_exists($output)) {
        unlink($output);
      }
      throw FilterException::fromProcess($proc)
        ->setInput($asset
        ->getContent());
    }
    if (!file_exists($output)) {
      throw new \RuntimeException('Error creating output file.');
    }
    $asset
      ->setContent(file_get_contents($output));
    unlink($output);
  }
  public function filterDump(AssetInterface $asset) {
  }

}