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- 06.01.2017
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AssetExtension.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Bridge\Twig\Extension;
013
014 use Symfony\Component\Asset\Packages;
015 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
016
017 /**
018 * Twig extension for the Symfony Asset component.
019 *
020 * @author Fabien Potencier <fabien@symfony.com>
021 */
022 class AssetExtension extends \Twig_Extension
023 {
024 private $packages;
025 private $foundationExtension;
026
027 /**
028 * Passing an HttpFoundationExtension instance as a second argument must not be relied on
029 * as it's only there to maintain BC with older Symfony version. It will be removed in 3.0.
030 */
031 public function __construct(Packages $packages, HttpFoundationExtension $foundationExtension = null)
032 {
033 $this->packages = $packages;
034 $this->foundationExtension = $foundationExtension;
035 }
036
037 /**
038 * {@inheritdoc}
039 */
040 public function getFunctions()
041 {
042 return array(
043 new \Twig_SimpleFunction('asset', array($this, 'getAssetUrl')),
044 new \Twig_SimpleFunction('asset_version', array($this, 'getAssetVersion')),
045 new \Twig_SimpleFunction('assets_version', array($this, 'getAssetsVersion'), array('deprecated' => true, 'alternative' => 'asset_version')),
046 );
047 }
048
049 /**
050 * Returns the public url/path of an asset.
051 *
052 * If the package used to generate the path is an instance of
053 * UrlPackage, you will always get a URL and not a path.
054 *
055 * @param string $path A public path
056 * @param string $packageName The name of the asset package to use
057 *
058 * @return string The public path of the asset
059 */
060 public function getAssetUrl($path, $packageName = null, $absolute = false, $version = null)
061 {
062 // BC layer to be removed in 3.0
063 if (2 < $count = func_num_args()) {
064 @trigger_error('Generating absolute URLs with the Twig asset() function was deprecated in 2.7 and will be removed in 3.0. Please use absolute_url() instead.', E_USER_DEPRECATED);
065 if (4 === $count) {
066 @trigger_error('Forcing a version with the Twig asset() function was deprecated in 2.7 and will be removed in 3.0.', E_USER_DEPRECATED);
067 }
068
069 $args = func_get_args();
070
071 return $this->getLegacyAssetUrl($path, $packageName, $args[2], isset($args[3]) ? $args[3] : null);
072 }
073
074 return $this->packages->getUrl($path, $packageName);
075 }
076
077 /**
078 * Returns the version of an asset.
079 *
080 * @param string $path A public path
081 * @param string $packageName The name of the asset package to use
082 *
083 * @return string The asset version
084 */
085 public function getAssetVersion($path, $packageName = null)
086 {
087 return $this->packages->getVersion($path, $packageName);
088 }
089
090 public function getAssetsVersion($packageName = null)
091 {
092 @trigger_error('The Twig assets_version() function was deprecated in 2.7 and will be removed in 3.0. Please use asset_version() instead.', E_USER_DEPRECATED);
093
094 return $this->packages->getVersion('/', $packageName);
095 }
096
097 private function getLegacyAssetUrl($path, $packageName = null, $absolute = false, $version = null)
098 {
099 if ($version) {
100 $package = $this->packages->getPackage($packageName);
101
102 $v = new \ReflectionProperty('Symfony\Component\Asset\Package', 'versionStrategy');
103 $v->setAccessible(true);
104
105 $currentVersionStrategy = $v->getValue($package);
106
107 if (property_exists($currentVersionStrategy, 'format')) {
108 $f = new \ReflectionProperty($currentVersionStrategy, 'format');
109 $f->setAccessible(true);
110
111 $format = $f->getValue($currentVersionStrategy);
112
113 $v->setValue($package, new StaticVersionStrategy($version, $format));
114 } else {
115 $v->setValue($package, new StaticVersionStrategy($version));
116 }
117 }
118
119 try {
120 $url = $this->packages->getUrl($path, $packageName);
121 } catch (\Exception $e) {
122 if ($version) {
123 $v->setValue($package, $currentVersionStrategy);
124 }
125
126 throw $e;
127 }
128
129 if ($version) {
130 $v->setValue($package, $currentVersionStrategy);
131 }
132
133 if ($absolute) {
134 return $this->foundationExtension->generateAbsoluteUrl($url);
135 }
136
137 return $url;
138 }
139
140 /**
141 * Returns the name of the extension.
142 *
143 * @return string The extension name
144 */
145 public function getName()
146 {
147 return 'asset';
148 }
149 }
150