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<?php |
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namespace Odan\Asset; |
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use JSMin\JSMin; |
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use RuntimeException; |
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use Symfony\Component\Cache\Adapter\AdapterInterface; |
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use Symfony\Component\Cache\Adapter\ArrayAdapter; |
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use tubalmartin\CssMin\Minifier as CssMinifier; |
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/** |
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* Extension that adds the ability to cache and minify assets. |
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*/ |
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final class AssetEngine |
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{ |
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/** @var AdapterInterface Cache */ |
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private $cache; |
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/** @var AssetCache */ |
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private $publicCache; |
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/** |
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* Enables minify. |
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* |
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* @var array |
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*/ |
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private $options = [ |
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'minify' => true, |
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'inline' => true, |
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'public_dir' => null, |
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'name' => 'file', |
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]; |
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/** |
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* Create new instance. |
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* |
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* @param array $options |
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*/ |
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public function __construct(array $options) |
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{ |
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if (!empty($options['cache']) && $options['cache'] instanceof AdapterInterface) { |
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$this->cache = $options['cache']; |
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} else { |
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$this->cache = new ArrayAdapter(); |
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} |
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$this->publicCache = new AssetCache($options['public_dir']); |
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unset($options['public_cache']); |
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unset($options['cache']); |
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$this->options = array_replace_recursive($this->options, $options); |
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} |
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/** |
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* Render and compress JavaScript assets. |
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* |
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* @param array $options |
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* |
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* @return string content |
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*/ |
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public function assetFile(string $asset, array $options = []): string |
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{ |
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return $this->assetFiles((array)$asset, $options); |
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} |
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/** |
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* Render and compress JavaScript assets. |
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* |
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* @param array $assets |
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* @param array $options |
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* |
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* @return string content |
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*/ |
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public function assetFiles(array $assets, array $options = []): string |
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{ |
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$assets = $this->prepareAssets($assets); |
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$options = array_replace_recursive($this->options, $options); |
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$cacheKey = $this->getCacheKey($assets, $options); |
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$cacheItem = $this->cache->getItem($cacheKey); |
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if ($cacheItem->isHit()) { |
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return $cacheItem->get(); |
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} |
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$jsFiles = []; |
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$cssFiles = []; |
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foreach ($assets as $file) { |
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$fileType = strtolower(pathinfo($file, PATHINFO_EXTENSION)); |
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if ($fileType === 'js') { |
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$jsFiles[] = $file; |
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} |
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if ($fileType === 'css') { |
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$cssFiles[] = $file; |
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} |
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} |
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$cssContent = $this->css($cssFiles, $options); |
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$jsContent = $this->js($jsFiles, $options); |
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$result = $cssContent . $jsContent; |
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$cacheItem->set($result); |
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$this->cache->save($cacheItem); |
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return $result; |
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} |
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/** |
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* Resolve real asset filenames. |
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* |
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* @param array $assets |
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* |
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* @return array |
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*/ |
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protected function prepareAssets(array $assets): array |
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{ |
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$result = []; |
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foreach ($assets as $name) { |
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$result[] = $this->getRealFilename($name); |
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} |
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return $result; |
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} |
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/** |
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* Render and compress CSS assets. |
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* |
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* @param array $assets |
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* @param array $options |
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* |
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* @return string content |
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*/ |
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public function js(array $assets, array $options): string |
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{ |
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$contents = []; |
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$public = ''; |
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foreach ($assets as $asset) { |
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if ($this->isExternalUrl($asset)) { |
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// External url |
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$contents[] = sprintf('<script src="%s"></script>', $asset); |
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continue; |
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} |
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$content = $this->getJsContent($asset, $options['minify']); |
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if (!empty($options['inline'])) { |
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$contents[] = sprintf('<script>%s</script>', $content); |
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} else { |
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$public .= $content . ''; |
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} |
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} |
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if (strlen($public) > 0) { |
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$name = $options['name'] ?? 'file.js'; |
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if (empty(pathinfo($name, PATHINFO_EXTENSION))) { |
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$name .= '.js'; |
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} |
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$url = $this->publicCache->createCacheBustedUrl($name, $public); |
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$contents[] = sprintf('<script src="%s"></script>', $url); |
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} |
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return implode("\n", $contents); |
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} |
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/** |
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* Minimise JS. |
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* |
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* @param string $file Name of default JS file |
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* @param bool $minify Minify js if true |
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* |
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* @throws RuntimeException |
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* |
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* @return string JavaScript code |
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*/ |
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protected function getJsContent(string $file, bool $minify): string |
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{ |
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$content = file_get_contents($file); |
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if ($content === false) { |
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throw new RuntimeException(sprintf('File could be read: %s', $file)); |
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} |
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if ($minify) { |
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$content = JSMin::minify($content); |
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} |
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return $content; |
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} |
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/** |
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* Render and compress CSS assets. |
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* |
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* @param array $assets |
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* @param array $options |
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* |
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* @return string content |
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*/ |
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public function css(array $assets, array $options): string |
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{ |
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$contents = []; |
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$public = ''; |
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foreach ($assets as $asset) { |
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if ($this->isExternalUrl($asset)) { |
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// External url |
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$contents[] = sprintf('<link rel="stylesheet" type="text/css" href="%s" media="all" />', $asset); |
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continue; |
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} |
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$content = $this->getCssContent($asset, $options['minify']); |
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if (!empty($options['inline'])) { |
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$contents[] = sprintf('<style>%s</style>', $content); |
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} else { |
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$public .= $content . ''; |
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} |
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} |
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if (strlen($public) > 0) { |
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$name = $options['name'] ?? 'file.css'; |
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if (empty(pathinfo($name, PATHINFO_EXTENSION))) { |
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$name .= '.css'; |
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} |
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$url = $this->publicCache->createCacheBustedUrl($name, $public); |
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$contents[] = sprintf('<link rel="stylesheet" type="text/css" href="%s" media="all" />', $url); |
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} |
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return implode("\n", $contents); |
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} |
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/** |
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* Minimize CSS. |
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* |
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* @param string $fileName Name of default CSS file |
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* @param bool $minify Minify css if true |
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* |
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* @throws RuntimeException |
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* |
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* @return string CSS code |
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*/ |
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public function getCssContent(string $fileName, bool $minify): string |
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{ |
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$content = file_get_contents($fileName); |
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if ($content === false) { |
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throw new RuntimeException(sprintf('File could be read: %s', $fileName)); |
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} |
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if ($minify === true) { |
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$compressor = new CssMinifier(); |
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$content = $compressor->run($content); |
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} |
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return $content; |
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} |
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/** |
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* Get cache key. |
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* |
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* @param array $assets |
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* @param array $settings |
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* |
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* @return string |
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*/ |
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protected function getCacheKey(array $assets, ?array $settings = null): string |
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{ |
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$keys = []; |
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foreach ($assets as $file) { |
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$keys[] = sha1_file($file); |
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} |
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$keys[] = sha1(serialize($settings)); |
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return sha1(implode('', $keys)); |
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} |
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/** |
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* Check if url is valid. |
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* |
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* @return bool |
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*/ |
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protected function isExternalUrl(string $url): bool |
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{ |
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return (!filter_var($url, FILTER_VALIDATE_URL) === false) && (strpos($url, 'vfs://') === false); |
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} |
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/** |
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* Returns full path and filename. |
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* |
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* @return string |
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*/ |
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protected function getRealFilename(string $filename): string |
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{ |
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return $filename; |
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} |
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} |
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