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<?php |
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namespace Hola\AmpToolboxBundle\EventSubscriber; |
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use AmpProject\Optimizer\ErrorCollection; |
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use AmpProject\Optimizer\TransformationEngine; |
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use Psr\Log\LoggerInterface; |
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use Sunra\PhpSimple\HtmlDomParser; |
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use Symfony\Component\EventDispatcher\EventSubscriberInterface; |
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use Symfony\Component\HttpFoundation\Response; |
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use Symfony\Component\HttpKernel\Event\ResponseEvent; |
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use Symfony\Component\HttpKernel\KernelEvents; |
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/** |
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* Listen response event and optimize html |
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* Class AmpOptimizerSubscriber |
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* @package Hola\AmpToolboxBundle\EventSubscriber |
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*/ |
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class AmpOptimizerSubscriber implements EventSubscriberInterface |
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{ |
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/** |
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* @var LoggerInterface |
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*/ |
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private $logger; |
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/** |
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* @var TransformationEngine |
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*/ |
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private $transformationEngine; |
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/** |
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* @var array |
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*/ |
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private $config; |
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/** |
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* AmpOptimizerSubscriber constructor. |
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* @param LoggerInterface $logger |
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* @param TransformationEngine $transformationEngine |
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* @param $config |
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*/ |
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public function __construct(LoggerInterface $logger, TransformationEngine $transformationEngine, $config) |
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{ |
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$this->config = $config; |
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$this->logger = $logger; |
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$this->transformationEngine = $transformationEngine; |
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} |
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/** |
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* @return array|array[] |
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*/ |
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public static function getSubscribedEvents() |
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{ |
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return [ |
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KernelEvents::RESPONSE => ['onKernelResponse', -10], |
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]; |
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} |
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/** |
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* @param ResponseEvent $event |
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* @return void |
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*/ |
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public function onKernelResponse(ResponseEvent $event): void |
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{ |
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if (!array_key_exists('transform_enabled', $this->config) || |
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false === $this->config['transform_enabled']) { |
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return; |
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} |
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if (!$event->isMasterRequest()) { |
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return; |
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} |
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if (!$this->isAmpHtml($event->getResponse())) { |
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return; |
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} |
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$errorCollection = new ErrorCollection(); |
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$optimizedHtml = $this->transformationEngine->optimizeHtml( |
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$event->getResponse()->getContent(), |
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$errorCollection |
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); |
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$event->getResponse()->setContent($optimizedHtml); |
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} |
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/** |
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* @param Response $response |
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* @return bool |
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*/ |
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private function isAmpHtml(Response $response): bool |
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{ |
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$contentType = $response->headers->get('Content-type'); |
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if (strpos($contentType, 'text/html') === false) { |
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return false; |
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} |
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$content = $response->getContent(); |
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$dom = HtmlDomParser::str_get_html($content); |
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$htmlElementAttrs = $dom->find('html', 0)->getAllAttributes(); |
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if (empty(array_intersect(['⚡', 'amp'], array_keys($htmlElementAttrs)))) { |
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return false; |
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} |
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return true; |
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} |
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} |
holadev /
amp-toolbox-bundle
