wp-optimize / vendor / kriswallsmith / assetic / src / Assetic / Extension / Twig / TwigFormulaLoader.php

TwigFormulaLoader.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 3.2.3, at vendor/kriswallsmith/assetic/src/Assetic/Extension/Twig/TwigFormulaLoader.php

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1	<?php
2
3	/*
4	* This file is part of the Assetic package, an OpenSky project.
5	*
6	* (c) 2010-2014 OpenSky Project Inc
7	*
8	* For the full copyright and license information, please view the LICENSE
9	* file that was distributed with this source code.
10	*/
11
12	namespace Assetic\Extension\Twig;
13
14	use Assetic\Factory\Loader\FormulaLoaderInterface;
15	use Assetic\Factory\Resource\ResourceInterface;
16	use Psr\Log\LoggerInterface;
17
18	/**
19	* Loads asset formulae from Twig templates.
20	*
21	* @author Kris Wallsmith <[email protected]>
22	*/
23	class TwigFormulaLoader implements FormulaLoaderInterface
24	{
25	private $twig;
26	private $logger;
27
28	public function __construct(\Twig_Environment $twig, LoggerInterface $logger = null)
29	{
30	$this->twig = $twig;
31	$this->logger = $logger;
32	}
33
34	public function load(ResourceInterface $resource)
35	{
36	try {
37	$tokens = $this->twig->tokenize(new \Twig_Source($resource->getContent(), (string) $resource));
38	$nodes = $this->twig->parse($tokens);
39	} catch (\Exception $e) {
40	if ($this->logger) {
41	$this->logger->error(sprintf('The template "%s" contains an error: %s', $resource, $e->getMessage()));
42	}
43
44	return array();
45	}
46
47	return $this->loadNode($nodes);
48	}
49
50	/**
51	* Loads assets from the supplied node.
52	*
53	* @param \Twig_Node $node
54	*
55	* @return array An array of asset formulae indexed by name
56	*/
57	private function loadNode(\Twig_Node $node)
58	{
59	$formulae = array();
60
61	if ($node instanceof AsseticNode) {
62	$formulae[$node->getAttribute('name')] = array(
63	$node->getAttribute('inputs'),
64	$node->getAttribute('filters'),
65	array(
66	'output' => $node->getAttribute('asset')->getTargetPath(),
67	'name' => $node->getAttribute('name'),
68	'debug' => $node->getAttribute('debug'),
69	'combine' => $node->getAttribute('combine'),
70	'vars' => $node->getAttribute('vars'),
71	),
72	);
73	} elseif ($node instanceof AsseticFilterNode) {
74	$name = $node->getAttribute('name');
75
76	$arguments = array();
77	foreach ($node->getNode('arguments') as $argument) {
78	$arguments[] = eval('return '.$this->twig->compile($argument).';');
79	}
80
81	$invoker = $this->twig->getExtension('Assetic\Extension\Twig\AsseticExtension')->getFilterInvoker($name);
82
83	$inputs = isset($arguments[0]) ? (array) $arguments[0] : array();
84	$filters = $invoker->getFilters();
85	$options = array_replace($invoker->getOptions(), isset($arguments[1]) ? $arguments[1] : array());
86
87	if (!isset($options['name'])) {
88	$options['name'] = $invoker->getFactory()->generateAssetName($inputs, $filters, $options);
89	}
90
91	$formulae[$options['name']] = array($inputs, $filters, $options);
92	}
93
94	foreach ($node as $child) {
95	if ($child instanceof \Twig_Node) {
96	$formulae += $this->loadNode($child);
97	}
98	}
99
100	if ($node->hasAttribute('embedded_templates')) {
101	foreach ($node->getAttribute('embedded_templates') as $child) {
102	$formulae += $this->loadNode($child);
103	}
104	}
105
106	return $formulae;
107	}
108	}
109