<?php

namespace Assetic\Extension\Twig;

use Assetic\Factory\Loader\FormulaLoaderInterface;
use Assetic\Factory\Resource\ResourceInterface;

/**
 * Loads asset formulae from Twig templates.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
class TwigFormulaLoader implements FormulaLoaderInterface
{
	private $twig;


	public function __construct(\Twig_Environment $twig)
	{
		$this->twig = $twig;
	}


	public function load(ResourceInterface $resource)
	{
		try {
		    $tokens = $this->twig->tokenize($resource->getContent(), (string) $resource);
		    $nodes  = $this->twig->parse($tokens);
		} catch (\Exception $e) {
		    return array();
		}

		return $this->loadNode($nodes);
	}


	/**
	 * Loads assets from the supplied node.
	 *
	 * @return array An array of asset formulae indexed by name
	 */
	private function loadNode(\Twig_Node $node)
	{
		$formulae = array();

		if ($node instanceof AsseticNode) {
		    $formulae[$node->getAttribute('name')] = array(
		        $node->getAttribute('inputs'),
		        $node->getAttribute('filters'),
		        array(
		            'output'  => $node->getAttribute('asset')->getTargetPath(),
		            'name'    => $node->getAttribute('name'),
		            'debug'   => $node->getAttribute('debug'),
		            'combine' => $node->getAttribute('combine'),
		        ),
		    );
		} elseif ($node instanceof \Twig_Node_Expression_Function) {
		    $name = version_compare(\Twig_Environment::VERSION, '1.2.0-DEV', '<')
		        ? $node->getNode('name')->getAttribute('name')
		        : $node->getAttribute('name');

		    if ($this->twig->getFunction($name) instanceof AsseticFilterFunction) {
		        $arguments = array();
		        foreach ($node->getNode('arguments') as $argument) {
		            $arguments[] = eval('return '.$this->twig->compile($argument).';');
		        }

		        $invoker = $this->twig->getExtension('assetic')->getFilterInvoker($name);

		        $inputs  = isset($arguments[0]) ? (array) $arguments[0] : array();
		        $filters = $invoker->getFilters();
		        $options = array_replace($invoker->getOptions(), isset($arguments[1]) ? $arguments[1] : array());

		        if (!isset($options['name'])) {
		            $options['name'] = $invoker->getFactory()->generateAssetName($inputs, $filters, $options);
		        }

		        $formulae[$options['name']] = array($inputs, $filters, $options);
		    }
		}

		foreach ($node as $child) {
		    if ($child instanceof \Twig_Node) {
		        $formulae += $this->loadNode($child);
		    }
		}

		return $formulae;
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NDcyMjA2NjQ2MzQ3NDI1NyAzMjAzMDg4MTY2MDU3NTQ3IDc5MjY5NTI4NTc4OTM3Mjg=