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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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class PrioritizedListenerCollection implements ListenerAcceptor, ListenerProviderInterface |
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{ |
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/** @var array<string,PrioritizedListenersForEvent> */ |
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protected $listenersPerEvent = []; |
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public function subscribeTo(string $event, callable $listener, int $priority = self::P_NORMAL): void |
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{ |
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$group = array_key_exists($event, $this->listenersPerEvent) |
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? $this->listenersPerEvent[$event] |
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: $this->listenersPerEvent[$event] = new PrioritizedListenersForEvent(); |
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$group->addListener($listener, $priority); |
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} |
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public function subscribeOnceTo(string $event, callable $listener, int $priority = self::P_NORMAL): void |
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{ |
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$this->subscribeTo($event, new OneTimeListener($listener), $priority); |
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} |
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public function getListenersForEvent(object $event): iterable |
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{ |
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if ($event instanceof HasEventName) { |
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yield from $this->getListenersForEventName($event->eventName()); |
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} |
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/** |
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* @var string $key |
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* @var PrioritizedListenersForEvent $group |
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*/ |
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foreach ($this->listenersPerEvent as $key => $group) { |
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if ($event instanceof $key) { |
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yield from $group->getListeners(); |
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} |
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} |
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} |
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private function getListenersForEventName(string $eventName): iterable |
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{ |
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if ( ! array_key_exists($eventName, $this->listenersPerEvent)) { |
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return []; |
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} |
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return $this->listenersPerEvent[$eventName]->getListeners(); |
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} |
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public function subscribeListenersFrom(ListenerSubscriber $subscriber): void |
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{ |
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$subscriber->subscribeListeners($this); |
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} |
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} |
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thephpleague /
event
