HandlebarsFilter.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 Handlebars templates into Javascript.
 *
 * @link http://handlebarsjs.com/
 * @author Keyvan Akbary <keyvan@funddy.com>
 */
class HandlebarsFilter extends BaseNodeFilter {
  private $handlebarsBin;
  private $nodeBin;
  private $minimize = false;
  private $simple = false;
  public function __construct($handlebarsBin = '/usr/bin/handlebars', $nodeBin = null) {
    $this->handlebarsBin = $handlebarsBin;
    $this->nodeBin = $nodeBin;
  }
  public function setMinimize($minimize) {
    $this->minimize = $minimize;
  }
  public function setSimple($simple) {
    $this->simple = $simple;
  }
  public function filterLoad(AssetInterface $asset) {
    $pb = $this
      ->createProcessBuilder($this->nodeBin ? array(
      $this->nodeBin,
      $this->handlebarsBin,
    ) : array(
      $this->handlebarsBin,
    ));
    $templateName = basename($asset
      ->getSourcePath());
    $inputDirPath = sys_get_temp_dir() . DIRECTORY_SEPARATOR . uniqid('input_dir');
    $inputPath = $inputDirPath . DIRECTORY_SEPARATOR . $templateName;
    $outputPath = tempnam(sys_get_temp_dir(), 'output');
    mkdir($inputDirPath);
    file_put_contents($inputPath, $asset
      ->getContent());
    $pb
      ->add($inputPath)
      ->add('-f')
      ->add($outputPath);
    if ($this->minimize) {
      $pb
        ->add('--min');
    }
    if ($this->simple) {
      $pb
        ->add('--simple');
    }
    $process = $pb
      ->getProcess();
    $returnCode = $process
      ->run();
    unlink($inputPath);
    rmdir($inputDirPath);
    if (127 === $returnCode) {
      throw new \RuntimeException('Path to node executable could not be resolved.');
    }
    if (0 !== $returnCode) {
      if (file_exists($outputPath)) {
        unlink($outputPath);
      }
      throw FilterException::fromProcess($process)
        ->setInput($asset
        ->getContent());
    }
    if (!file_exists($outputPath)) {
      throw new \RuntimeException('Error creating output file.');
    }
    $compiledJs = file_get_contents($outputPath);
    unlink($outputPath);
    $asset
      ->setContent($compiledJs);
  }
  public function filterDump(AssetInterface $asset) {
  }

}