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<?php |
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declare(strict_types=1); |
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namespace Nymfonya\Component\Pubsub; |
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use Closure; |
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use Nymfonya\Component\Pubsub\EventInterface; |
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use Nymfonya\Component\Pubsub\ClosureWrapper; |
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class Dispatcher implements DispatcherInterface |
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{ |
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/** |
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* listener stack. |
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* Struct : [resName][event][hash] |
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* |
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* @var array |
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*/ |
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protected $stack = array(); |
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/** |
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* Subscribes the listener to the resource's events. |
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* If $resName is *, |
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* then the listener will be dispatched when the specified event |
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* is fired. |
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* If $event is *, |
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* then the listener will be dispatched |
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* for any dispatched event of the specified resource. |
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* If $resName and $event is *, |
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* the listener will be dispatched |
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* for any dispatched event for any resource. |
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* |
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* @param ListenerInterface $listener |
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* @param String $resName |
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* @param String $eventName |
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* @return string |
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*/ |
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public function subscribe( |
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ListenerInterface $listener, |
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$resName = self::ANY, |
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$eventName = self::ANY |
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): string { |
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$hash = $listener->hash(); |
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$this->stack[$resName][$eventName][$hash] = $listener; |
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return $hash; |
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} |
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/** |
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* Subscribes the listener to the resource's events. |
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* If $resName is *, |
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* then the listener will be dispatched when the specified event |
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* is fired. |
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* If $event is *, |
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* then the listener will be dispatched |
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* for any dispatched event of the specified resource. |
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* If $resName and $event is *, |
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* the listener will be dispatched |
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* for any dispatched event for any resource. |
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* |
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* @param Closure $closure |
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* @param String $resName |
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* @param String $eventName |
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* @return string |
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*/ |
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public function subscribeClosure( |
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Closure $closure, |
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$resName = self::ANY, |
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$eventName = self::ANY |
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): string { |
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$listener = new ClosureWrapper($closure); |
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$hash = $listener->hash(); |
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$this->stack[$resName][$eventName][$hash] = $listener; |
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return $hash; |
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} |
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/** |
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* Unsubscribes the listener from the resource's events |
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* |
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* @param string $hash |
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* @param String $resName |
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* @param String $eventName |
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* @return boolean |
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*/ |
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public function unsubscribe( |
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string $hash, |
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$resName = self::ANY, |
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$eventName = self::ANY |
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): bool { |
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if (isset($this->stack[$resName][$eventName][$hash])) { |
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unset($this->stack[$resName][$eventName][$hash]); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Publishes an event to all the listeners |
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* listening to the specified event |
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* for the specified resource |
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* |
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* @param EventInterface $event |
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* @return DispatcherInterface |
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*/ |
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public function publish(EventInterface $event): DispatcherInterface |
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{ |
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$resName = $event->getResourceName(); |
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$eventName = $event->getEventName(); |
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$this |
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->dispatchAllHandlers($event) |
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->dispatchResourcedHandlers($resName, $event) |
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->dispatchResourcedEventedHandlers($resName, $eventName, $event); |
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return $this; |
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} |
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/** |
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* dispatch to all handlers the wildcard handlers |
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* |
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* @param EventInterface $event |
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* @return DispatcherInterface |
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*/ |
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protected function dispatchAllHandlers( |
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EventInterface $event |
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): DispatcherInterface { |
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if (isset($this->stack[self::ANY][self::ANY])) { |
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foreach ($this->stack[self::ANY][self::ANY] as $listener) { |
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$listener->publish($event); |
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} |
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} |
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return $this; |
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} |
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/** |
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* dispatch to handlers identified by resource name |
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* despite the event |
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* |
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* @param string $resName |
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* @param EventInterface $event |
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* @return DispatcherInterface |
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*/ |
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protected function dispatchResourcedHandlers( |
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string $resName, |
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EventInterface $event |
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): DispatcherInterface { |
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if (isset($this->stack[$resName][self::ANY])) { |
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foreach ($this->stack[$resName][self::ANY] as $listener) { |
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$listener->publish($event); |
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} |
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} |
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return $this; |
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} |
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/** |
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* dispatch to handlers identified by resource name and event name |
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* |
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* @param string $resName |
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* @param string $eventName |
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* @param EventInterface $event |
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* @return DispatcherInterface |
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*/ |
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protected function dispatchResourcedEventedHandlers( |
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string $resName, |
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string $eventName, |
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EventInterface $event |
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): DispatcherInterface { |
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if (isset($this->stack[$resName][$eventName])) { |
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foreach ($this->stack[$resName][$eventName] as $listener) { |
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$listener->publish($event); |
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} |
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} |
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return $this; |
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} |
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} |
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pierre-fromager /
nymfonya-pubsub
