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<?php |
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declare(strict_types=1); |
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namespace League\Event; |
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use Psr\EventDispatcher\ListenerProviderInterface; |
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use Psr\EventDispatcher\StoppableEventInterface; |
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class EventDispatcher implements EventDispatchingListenerRegistry |
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{ |
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/** |
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* @var ListenerProviderInterface |
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*/ |
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protected $listenerProvider; |
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public function __construct(ListenerProviderInterface $listenerProvider = null) |
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{ |
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$this->listenerProvider = $listenerProvider instanceof ListenerProviderInterface |
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? $listenerProvider |
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: new PrioritizedListenerRegistry(); |
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} |
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public function dispatch(object $event): object |
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{ |
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$listeners = $this->listenerProvider->getListenersForEvent($event); |
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$event instanceof StoppableEventInterface |
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? $this->dispatchStoppableEvent($listeners, $event) |
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: $this->dispatchUnstoppableEvent($listeners, $event); |
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return $event; |
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} |
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public function dispatchGeneratedEvents(EventGenerator $generator): void |
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{ |
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foreach ($generator->releaseEvents() as $event) { |
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$this->dispatch($event); |
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} |
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} |
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private function dispatchStoppableEvent(iterable $listeners, StoppableEventInterface $event): void |
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{ |
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foreach ($listeners as $listener) { |
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if ($event->isPropagationStopped()) { |
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break; |
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} |
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$listener($event); |
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} |
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} |
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private function dispatchUnstoppableEvent(iterable $listeners, object $event): void |
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{ |
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foreach ($listeners as $listener) { |
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$listener($event); |
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} |
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} |
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View Code Duplication |
public function subscribeTo(string $event, callable $listener, int $priority = ListenerPriority::NORMAL): void |
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{ |
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if ( ! $this->listenerProvider instanceof ListenerRegistry) { |
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throw UnableToSubscribeListener::becauseTheListenerProviderDoesNotAcceptListeners($this->listenerProvider); |
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} |
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$this->listenerProvider->subscribeTo($event, $listener, $priority); |
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} |
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View Code Duplication |
public function subscribeOnceTo(string $event, callable $listener, int $priority = ListenerPriority::NORMAL): void |
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{ |
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if ( ! $this->listenerProvider instanceof ListenerRegistry) { |
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throw UnableToSubscribeListener::becauseTheListenerProviderDoesNotAcceptListeners($this->listenerProvider); |
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} |
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$this->listenerProvider->subscribeOnceTo($event, $listener, $priority); |
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} |
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public function subscribeListenersFrom(ListenerSubscriber $subscriber): void |
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{ |
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if ( ! $this->listenerProvider instanceof ListenerRegistry) { |
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throw UnableToSubscribeListener::becauseTheListenerProviderDoesNotAcceptListeners($this->listenerProvider); |
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} |
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$this->listenerProvider->subscribeListenersFrom($subscriber); |
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} |
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} |
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thephpleague /
event
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Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.