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<?php |
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/* |
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* event-symfony-messenger (https://github.com/phpgears/event-symfony-messenger). |
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* Event bus with Symfony's Messenger. |
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* |
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* @license MIT |
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* @link https://github.com/phpgears/event-symfony-messenger |
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* @author Julián Gutiérrez <[email protected]> |
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*/ |
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declare(strict_types=1); |
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namespace Gears\Event\Symfony\Messenger; |
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use Gears\Event\Event; |
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use Gears\Event\EventHandler; |
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use Gears\Event\Exception\InvalidEventException; |
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use Gears\Event\Exception\InvalidEventHandlerException; |
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use Symfony\Component\Messenger\Envelope; |
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use Symfony\Component\Messenger\Handler\HandlerDescriptor; |
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use Symfony\Component\Messenger\Handler\HandlersLocatorInterface; |
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class EventHandlerLocator implements HandlersLocatorInterface |
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{ |
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/** |
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* Event handlers map. |
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* |
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* @var mixed[] |
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*/ |
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protected $handlersMap; |
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/** |
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* EventHandlerLocator constructor. |
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* |
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* @param mixed[] $handlers |
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*/ |
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public function __construct(array $handlers) |
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{ |
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$handlers = \array_map( |
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function ($handler) { |
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if (!\is_array($handler)) { |
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$handler = [$handler]; |
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} |
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return $handler; |
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}, |
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$handlers |
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); |
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$this->handlersMap = $handlers; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @throws InvalidEventHandlerException |
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*/ |
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public function getHandlers(Envelope $envelope): iterable |
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{ |
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$seen = []; |
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foreach ($this->getEventMap($envelope) as $type) { |
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foreach ($this->handlersMap[$type] ?? [] as $alias => $handler) { |
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if (!$handler instanceof EventHandler) { |
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throw new InvalidEventHandlerException(\sprintf( |
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'Event handler must implement %s interface, %s given', |
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EventHandler::class, |
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\is_object($handler) ? \get_class($handler) : \gettype($handler) |
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)); |
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} |
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$handlerCallable = function (Event $event) use ($handler): void { |
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$handler->handle($event); |
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}; |
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if (!\in_array($handlerCallable, $seen, true)) { |
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$seen[] = $handlerCallable; |
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yield $alias => new HandlerDescriptor($handlerCallable); |
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} |
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} |
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} |
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} |
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/** |
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* Get command mapping. |
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* |
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* @param Envelope $envelope |
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* |
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* @throws InvalidEventException |
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* |
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* @return mixed[] |
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*/ |
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final protected function getEventMap(Envelope $envelope): array |
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{ |
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/** @var mixed $event */ |
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$event = $envelope->getMessage(); |
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if (!$event instanceof Event) { |
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throw new InvalidEventException(\sprintf( |
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'Event must implement %s interface, %s given', |
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Event::class, |
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\is_object($event) ? \get_class($event) : \gettype($event) |
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)); |
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} |
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$class = \get_class($event); |
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return [$class => $class] |
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+ ['*' => '*']; |
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} |
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} |
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phpgears /
event-symfony-messenger
