class AsseticNode

class AsseticNode extends \Twig_Node {

  /**
   * Constructor.
   *
   * Available attributes:
   *
   *  * debug:    The debug mode
   *  * combine:  Whether to combine assets
   *  * var_name: The name of the variable to expose to the body node
   *
   * @param AssetInterface      $asset      The asset
   * @param \Twig_NodeInterface $body       The body node
   * @param array               $inputs     An array of input strings
   * @param array               $filters    An array of filter strings
   * @param string              $name       The name of the asset
   * @param array               $attributes An array of attributes
   * @param integer             $lineno     The line number
   * @param string              $tag        The tag name
   */
  public function __construct(AssetInterface $asset, \Twig_NodeInterface $body, array $inputs, array $filters, $name, array $attributes = array(), $lineno = 0, $tag = null) {
    $nodes = array(
      'body' => $body,
    );
    $attributes = array_replace(array(
      'debug' => null,
      'combine' => null,
      'var_name' => 'asset_url',
    ), $attributes, array(
      'asset' => $asset,
      'inputs' => $inputs,
      'filters' => $filters,
      'name' => $name,
    ));
    parent::__construct($nodes, $attributes, $lineno, $tag);
  }
  public function compile(\Twig_Compiler $compiler) {
    $compiler
      ->addDebugInfo($this);
    $combine = $this
      ->getAttribute('combine');
    $debug = $this
      ->getAttribute('debug');
    if (null === $combine && null !== $debug) {
      $combine = !$debug;
    }
    if (null === $combine) {
      $compiler
        ->write("if (isset(\$context['assetic']['debug']) && \$context['assetic']['debug']) {\n")
        ->indent();
      $this
        ->compileDebug($compiler);
      $compiler
        ->outdent()
        ->write("} else {\n")
        ->indent();
      $this
        ->compileAsset($compiler, $this
        ->getAttribute('asset'), $this
        ->getAttribute('name'));
      $compiler
        ->outdent()
        ->write("}\n");
    }
    elseif ($combine) {
      $this
        ->compileAsset($compiler, $this
        ->getAttribute('asset'), $this
        ->getAttribute('name'));
    }
    else {
      $this
        ->compileDebug($compiler);
    }
    $compiler
      ->write('unset($context[')
      ->repr($this
      ->getAttribute('var_name'))
      ->raw("]);\n");
  }
  protected function compileDebug(\Twig_Compiler $compiler) {
    $i = 0;
    foreach ($this
      ->getAttribute('asset') as $leaf) {
      $leafName = $this
        ->getAttribute('name') . '_' . $i++;
      $this
        ->compileAsset($compiler, $leaf, $leafName);
    }
  }
  protected function compileAsset(\Twig_Compiler $compiler, AssetInterface $asset, $name) {
    if ($vars = $asset
      ->getVars()) {
      $compiler
        ->write("// check variable conditions\n");
      foreach ($vars as $var) {
        $compiler
          ->write("if (!isset(\$context['assetic']['vars']['{$var}'])) {\n")
          ->indent()
          ->write("throw new \\RuntimeException(sprintf('The asset \"" . $name . "\" expected variable \"" . $var . "\" to be set, but got only these vars: %s. Did you set-up a value supplier?', isset(\$context['assetic']['vars']) && \$context['assetic']['vars'] ? implode(', ', \$context['assetic']['vars']) : '# none #'));\n")
          ->outdent()
          ->write("}\n");
      }
      $compiler
        ->raw("\n");
    }
    $compiler
      ->write("// asset \"{$name}\"\n")
      ->write('$context[')
      ->repr($this
      ->getAttribute('var_name'))
      ->raw('] = ');
    $this
      ->compileAssetUrl($compiler, $asset, $name);
    $compiler
      ->raw(";\n")
      ->subcompile($this
      ->getNode('body'));
  }
  protected function compileAssetUrl(\Twig_Compiler $compiler, AssetInterface $asset, $name) {
    if (!($vars = $asset
      ->getVars())) {
      $compiler
        ->repr($asset
        ->getTargetPath());
      return;
    }
    $compiler
      ->raw("strtr(")
      ->string($asset
      ->getTargetPath())
      ->raw(", array(");
    $first = true;
    foreach ($vars as $var) {
      if (!$first) {
        $compiler
          ->raw(", ");
      }
      $first = false;
      $compiler
        ->string("{" . $var . "}")
        ->raw(" => \$context['assetic']['vars']['{$var}']");
    }
    $compiler
      ->raw("))");
  }

}