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<?php |
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declare(strict_types=1); |
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namespace Spiral\Interceptors\Handler; |
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use Psr\EventDispatcher\EventDispatcherInterface; |
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use Spiral\Interceptors\Context\CallContext; |
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use Spiral\Interceptors\Event\InterceptorCalling; |
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use Spiral\Interceptors\Exception\InterceptorException; |
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use Spiral\Interceptors\HandlerInterface; |
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use Spiral\Interceptors\InterceptorInterface; |
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/** |
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* Interceptor pipeline. |
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* |
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* WARNING: make sure you don't use any legacy interceptors because they aren't supported with this pipeline. |
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*/ |
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final class InterceptorPipeline implements HandlerInterface |
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{ |
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private ?HandlerInterface $handler = null; |
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/** @var InterceptorInterface */ |
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private array $interceptors = []; |
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private int $position = 0; |
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public function __construct( |
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private readonly ?EventDispatcherInterface $dispatcher = null |
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) { |
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} |
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public function addInterceptor(InterceptorInterface $interceptor): void |
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{ |
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$this->interceptors[] = $interceptor; |
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} |
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public function withHandler(HandlerInterface $handler): self |
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{ |
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$pipeline = clone $this; |
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$pipeline->handler = $handler; |
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return $pipeline; |
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} |
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/** |
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* @throws \Throwable |
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*/ |
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public function handle(CallContext $context): mixed |
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{ |
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if ($this->handler === null) { |
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throw new InterceptorException('Unable to invoke pipeline without last handler.'); |
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} |
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if (isset($this->interceptors[$this->position])) { |
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$interceptor = $this->interceptors[$this->position]; |
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$this->dispatcher?->dispatch(new InterceptorCalling(context: $context, interceptor: $interceptor)); |
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return $interceptor->intercept($context, $this->next()); |
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} |
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return $this->handler->handle($context); |
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} |
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private function next(): self |
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{ |
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$pipeline = clone $this; |
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++$pipeline->position; |
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return $pipeline; |
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} |
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} |
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spiral /
framework
