<?php

namespace Assetic\Extension\Twig;

use Assetic\Factory\AssetFactory;

class AsseticExtension extends \Twig_Extension
{
	protected $factory;
	protected $functions;


	public function __construct(AssetFactory $factory, $functions = array())
	{
		$this->factory = $factory;
		$this->functions = array();

		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()),
		);
	}


	public function getFilterInvoker($function)
	{
		return new AsseticFilterInvoker($this->factory, $this->functions[$function]);
	}


	public function getName()
	{
		return 'assetic';
	}
}
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