98 lines
3.1 KiB
PHP
98 lines
3.1 KiB
PHP
<?php
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/*
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* This file is part of the Assetic package, an OpenSky project.
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*
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* (c) 2010-2012 OpenSky Project Inc
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Assetic\Extension\Twig;
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use Assetic\Factory\Loader\FormulaLoaderInterface;
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use Assetic\Factory\Resource\ResourceInterface;
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/**
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* Loads asset formulae from Twig templates.
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*
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* @author Kris Wallsmith <kris.wallsmith@gmail.com>
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*/
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class TwigFormulaLoader implements FormulaLoaderInterface
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{
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private $twig;
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public function __construct(\Twig_Environment $twig)
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{
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$this->twig = $twig;
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}
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public function load(ResourceInterface $resource)
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{
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try {
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$tokens = $this->twig->tokenize($resource->getContent(), (string) $resource);
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$nodes = $this->twig->parse($tokens);
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} catch (\Exception $e) {
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return array();
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}
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return $this->loadNode($nodes);
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}
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/**
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* Loads assets from the supplied node.
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*
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* @return array An array of asset formulae indexed by name
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*/
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private function loadNode(\Twig_Node $node)
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{
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$formulae = array();
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if ($node instanceof AsseticNode) {
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$formulae[$node->getAttribute('name')] = array(
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$node->getAttribute('inputs'),
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$node->getAttribute('filters'),
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array(
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'output' => $node->getAttribute('asset')->getTargetPath(),
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'name' => $node->getAttribute('name'),
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'debug' => $node->getAttribute('debug'),
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'combine' => $node->getAttribute('combine'),
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'vars' => $node->getAttribute('vars'),
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),
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);
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} elseif ($node instanceof \Twig_Node_Expression_Function) {
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$name = version_compare(\Twig_Environment::VERSION, '1.2.0-DEV', '<')
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? $node->getNode('name')->getAttribute('name')
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: $node->getAttribute('name');
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if ($this->twig->getFunction($name) instanceof AsseticFilterFunction) {
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$arguments = array();
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foreach ($node->getNode('arguments') as $argument) {
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$arguments[] = eval('return '.$this->twig->compile($argument).';');
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}
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$invoker = $this->twig->getExtension('assetic')->getFilterInvoker($name);
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$inputs = isset($arguments[0]) ? (array) $arguments[0] : array();
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$filters = $invoker->getFilters();
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$options = array_replace($invoker->getOptions(), isset($arguments[1]) ? $arguments[1] : array());
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if (!isset($options['name'])) {
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$options['name'] = $invoker->getFactory()->generateAssetName($inputs, $filters, $options);
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}
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$formulae[$options['name']] = array($inputs, $filters, $options);
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}
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}
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foreach ($node as $child) {
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if ($child instanceof \Twig_Node) {
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$formulae += $this->loadNode($child);
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}
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}
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return $formulae;
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}
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}
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