<?php
  
  /*
   * This file is part of the Assetic package, an OpenSky project.
   *
   * (c) 2010-2014 OpenSky Project Inc
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */
  
  namespace Assetic\Extension\Twig;
  
  use Assetic\Factory\AssetFactory;
  use Assetic\ValueSupplierInterface;
  
  class AsseticExtension extends \Twig_Extension
  {
      protected $factory;
      protected $functions;
      protected $valueSupplier;
  
      public function __construct(AssetFactory $factory, $functions = array(), ValueSupplierInterface $valueSupplier = null)
      {
          $this->factory = $factory;
          $this->functions = array();
          $this->valueSupplier = $valueSupplier;
  
          foreach ($functions as $function => $options) {
              if (is_integer($function) && is_string($options)) {
                  $this->functions[$options] = array('filter' => $options);
              } else {
                  $this->functions[$function] = $options + array('filter' => $function);
              }
          }
      }
  
      public function getTokenParsers()
      {
          return array(
              new AsseticTokenParser($this->factory, 'javascripts', 'js/*.js'),
              new AsseticTokenParser($this->factory, 'stylesheets', 'css/*.css'),
              new AsseticTokenParser($this->factory, 'image', 'images/*', true),
          );
      }
  
      public function getFunctions()
      {
          $functions = array();
          foreach ($this->functions as $function => $filter) {
              $functions[$function] = new AsseticFilterFunction($function);
          }
  
          return $functions;
      }
  
      public function getGlobals()
      {
          return array(
              'assetic' => array(
                  'debug' => $this->factory->isDebug(),
                  'vars'  => null !== $this->valueSupplier ? new ValueContainer($this->valueSupplier) : array(),
              ),
          );
      }
  
      public function getFilterInvoker($function)
      {
          return new AsseticFilterInvoker($this->factory, $this->functions[$function]);
      }
  
      public function getName()
      {
          return 'assetic';
      }
  }