make AddLiveAttributesSubscriber lazy

Author: kbond

src/LiveComponent/src/DependencyInjection/LiveComponentExtension.php

@@ -96,8 +96,8 @@ function (ChildDefinition $definition, AsLiveComponent $attribute) {
         ;
 
         $container->register('ux.live_component.add_attributes_subscriber', AddLiveAttributesSubscriber::class)
-            ->setArguments([new Reference('ux.live_component.twig.component_runtime')])
             ->addTag('kernel.event_subscriber')
+            ->addTag('container.service_subscriber', ['key' => LiveComponentRuntime::class, 'id' => 'ux.live_component.twig.component_runtime'])
         ;
 
         $container->setAlias(ComponentValidatorInterface::class, ComponentValidator::class);

src/LiveComponent/src/EventListener/AddLiveAttributesSubscriber.php

@@ -2,19 +2,20 @@
 
 namespace Symfony\UX\LiveComponent\EventListener;
 
+use Psr\Container\ContainerInterface;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Contracts\Service\ServiceSubscriberInterface;
 use Symfony\UX\LiveComponent\Twig\LiveComponentRuntime;
 use Symfony\UX\TwigComponent\ComponentAttributes;
 use Symfony\UX\TwigComponent\EventListener\PreRenderEvent;
 
 /**
  * @author Kevin Bond <[email protected]>
  */
-final class AddLiveAttributesSubscriber implements EventSubscriberInterface
+final class AddLiveAttributesSubscriber implements EventSubscriberInterface, ServiceSubscriberInterface
 {
-    public function __construct(private LiveComponentRuntime $runtime)
+    public function __construct(private ContainerInterface $container)
     {
-        // todo make lazy?
     }
 
     public function onPreRender(PreRenderEvent $event): void
@@ -24,7 +25,10 @@ public function onPreRender(PreRenderEvent $event): void
             return;
         }
 
-        $attributes = $this->runtime->getLiveAttributes($event->component, $event->config);
+        /** @var ComponentAttributes $attributes */
+        $attributes = $this->container->get(LiveComponentRuntime::class)
+            ->getLiveAttributes($event->component, $event->config)
+        ;
 
         if (isset($event->context['attributes']) && $event->context['attributes'] instanceof ComponentAttributes) {
             // merge with existing attributes if available
@@ -38,4 +42,11 @@ public static function getSubscribedEvents(): array
     {
         return [PreRenderEvent::class => 'onPreRender'];
     }
+
+    public static function getSubscribedServices(): array
+    {
+        return [
+            LiveComponentRuntime::class,
+        ];
+    }
 }