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- <?php
- namespace Drupal\Core\DependencyInjection\Compiler;
- use Symfony\Component\DependencyInjection\ContainerBuilder;
- use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
- /**
- * Registers all event subscribers to the event dispatcher.
- */
- class RegisterEventSubscribersPass implements CompilerPassInterface {
- /**
- * {@inheritdoc}
- */
- public function process(ContainerBuilder $container) {
- if (!$container->hasDefinition('event_dispatcher')) {
- return;
- }
- $definition = $container->getDefinition('event_dispatcher');
- $event_subscriber_info = [];
- foreach ($container->findTaggedServiceIds('event_subscriber') as $id => $attributes) {
- // We must assume that the class value has been correctly filled, even if
- // the service is created by a factory.
- $class = $container->getDefinition($id)->getClass();
- $refClass = new \ReflectionClass($class);
- $interface = 'Symfony\Component\EventDispatcher\EventSubscriberInterface';
- if (!$refClass->implementsInterface($interface)) {
- throw new \InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $id, $interface));
- }
- // Get all subscribed events.
- foreach ($class::getSubscribedEvents() as $event_name => $params) {
- if (is_string($params)) {
- $priority = 0;
- $event_subscriber_info[$event_name][$priority][] = ['service' => [$id, $params]];
- }
- elseif (is_string($params[0])) {
- $priority = isset($params[1]) ? $params[1] : 0;
- $event_subscriber_info[$event_name][$priority][] = ['service' => [$id, $params[0]]];
- }
- else {
- foreach ($params as $listener) {
- $priority = isset($listener[1]) ? $listener[1] : 0;
- $event_subscriber_info[$event_name][$priority][] = ['service' => [$id, $listener[0]]];
- }
- }
- }
- }
- foreach (array_keys($event_subscriber_info) as $event_name) {
- krsort($event_subscriber_info[$event_name]);
- }
- $definition->addArgument($event_subscriber_info);
- }
- }
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