92 lines
2.4 KiB
PHP
92 lines
2.4 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Doctrine\Common;
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use function spl_object_id;
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/**
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* The EventManager is the central point of Doctrine's event listener system.
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* Listeners are registered on the manager and events are dispatched through the
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* manager.
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*/
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class EventManager implements EventManagerInterface
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{
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/**
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* Map of registered listeners.
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* <event> => <listeners>
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*
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* @var array<string, object[]>
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*/
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private array $listeners = [];
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/** {@inheritDoc} */
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public function dispatchEvent(string $eventName, EventArgs|null $eventArgs = null): void
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{
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if (! isset($this->listeners[$eventName])) {
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return;
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}
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$eventArgs ??= EventArgs::getEmptyInstance();
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foreach ($this->listeners[$eventName] as $listener) {
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$listener->$eventName($eventArgs);
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}
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}
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/** {@inheritDoc} */
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public function getListeners(string $event): array
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{
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return $this->listeners[$event] ?? [];
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}
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/** {@inheritDoc} */
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public function getAllListeners(): array
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{
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return $this->listeners;
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}
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/** {@inheritDoc} */
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public function hasListeners(string $event): bool
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{
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return ! empty($this->listeners[$event]);
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}
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/** {@inheritDoc} */
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public function addEventListener(string|array $events, object $listener): void
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{
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// Picks the hash code related to that listener
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$oid = spl_object_id($listener);
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foreach ((array) $events as $event) {
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// Overrides listener if a previous one was associated already
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// Prevents duplicate listeners on same event (same instance only)
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$this->listeners[$event][$oid] = $listener;
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}
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}
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/** {@inheritDoc} */
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public function removeEventListener(string|array $events, object $listener): void
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{
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// Picks the hash code related to that listener
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$oid = spl_object_id($listener);
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foreach ((array) $events as $event) {
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unset($this->listeners[$event][$oid]);
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}
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}
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/** {@inheritDoc} */
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public function addEventSubscriber(EventSubscriber $subscriber): void
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{
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$this->addEventListener($subscriber->getSubscribedEvents(), $subscriber);
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}
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/** {@inheritDoc} */
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public function removeEventSubscriber(EventSubscriber $subscriber): void
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{
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$this->removeEventListener($subscriber->getSubscribedEvents(), $subscriber);
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}
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}
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