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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\EventDispatcher\Provider; |
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use Psr\EventDispatcher\EventDispatcherInterface; |
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use Psr\EventDispatcher\ListenerProviderInterface; |
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/** |
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* DeferredProvider is a listener provider that allows you to perform deferred |
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* events |
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*/ |
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final class DeferredProvider implements ListenerProviderInterface |
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{ |
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private EventDispatcherInterface $dispatcher; |
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private bool $deferEvents = false; |
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private array $events = []; |
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public function __construct(EventDispatcherInterface $dispatcher) |
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{ |
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$this->dispatcher = $dispatcher; |
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} |
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/** |
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* returns a relevant listener or defer event |
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*/ |
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public function getListenersForEvent(object $event): iterable |
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{ |
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if ($this->deferEvents) { |
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yield fn ($event) => $this->addEvent($event); |
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} else { |
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yield fn ($event) => $this->dispatchEvent($event); |
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} |
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} |
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/** |
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* Enable deferred event mode |
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*/ |
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public function deferEvents(): void |
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{ |
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$this->deferEvents = true; |
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} |
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/** |
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* Deletes all deferred events |
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*/ |
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public function clearEvents(): void |
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{ |
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$this->events = []; |
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} |
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/** |
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* Dispatch all deferred events |
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* |
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* @return array dispatch events |
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*/ |
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public function dispatchEvents(): array |
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{ |
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$events = $this->events; |
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$this->clearEvents(); |
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$this->deferEvents = false; |
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$dispatchedEvents = []; |
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foreach ($events as $event) { |
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$dispatchedEvents[] = $this->dispatchEvent($event); |
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} |
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return $dispatchedEvents; |
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} |
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private function addEvent(object $event): void |
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{ |
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$this->events[] = $event; |
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} |
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private function dispatchEvent(object $event): object |
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{ |
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return $this->dispatcher->dispatch($event); |
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} |
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} |
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yiisoft /
event-dispatcher
