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<?php |
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namespace Iulyanp\ElixirBundle\Twig; |
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/** |
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* Class ElixirExtension. |
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*/ |
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class ElixirExtension extends \Twig_Extension |
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{ |
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/** @var string */ |
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protected $webDir; |
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/** @var string */ |
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protected $buildDir; |
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/** |
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* ElixirExtension constructor. |
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* |
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* @param string $webDir |
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* @param string $buildDir |
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*/ |
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public function __construct($webDir, $buildDir) |
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{ |
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$this->webDir = $webDir; |
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$this->buildDir = $buildDir; |
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} |
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/** |
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* @return array |
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*/ |
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public function getFunctions() |
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{ |
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return [ |
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new \Twig_SimpleFunction('elixir', [$this, 'getAssetVersion']), |
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]; |
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} |
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/** |
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* @param $asset |
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* |
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* @throws \Exception |
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* |
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* @return string |
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*/ |
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public function getAssetVersion($asset) |
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{ |
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$asset = trim($asset, '/'); |
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$manifest = $this->readManifest(); |
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if (array_key_exists($asset, $manifest)) { |
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return sprintf( |
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'%s%s%s%s', |
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DIRECTORY_SEPARATOR, |
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$this->buildDir, |
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DIRECTORY_SEPARATOR, |
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$manifest[$asset] |
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); |
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} |
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throw new \Exception(sprintf('File %s not defined in asset manifest.', $asset)); |
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} |
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/** |
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* Returns the name of the extension. |
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* |
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* @return string The extension name |
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*/ |
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public function getName() |
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{ |
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return 'elixir'; |
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} |
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/** |
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* @return mixed |
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*/ |
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private function readManifest() |
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{ |
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static $manifest; |
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static $manifestPath; |
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$manifestFile = $this->checkManifestFileExists(); |
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if (is_null($manifest) || $manifestPath !== $this->buildDir) { |
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$manifestPath = $this->buildDir; |
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return json_decode( |
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file_get_contents($manifestFile), |
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true |
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); |
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} |
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return $manifest; |
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} |
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/** |
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* @throws \Exception |
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* |
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* @return string |
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*/ |
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private function checkManifestFileExists() |
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{ |
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$manifestFile = sprintf( |
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'%s%s%s%s%s', |
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$this->webDir, |
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DIRECTORY_SEPARATOR, |
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$this->buildDir, |
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DIRECTORY_SEPARATOR, |
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'rev-manifest.json' |
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); |
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if (!file_exists($manifestFile)) { |
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throw new \Exception(sprintf('File %s not defined in asset manifest.', $manifestFile)); |
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} |
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return $manifestFile; |
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} |
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} |
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iulyanp /
elixir-bundle
