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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Middleware\Dispatcher; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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final class MiddlewareDispatcher |
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{ |
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/** |
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* Contains a middleware pipeline handler. |
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* |
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* @var MiddlewarePipelineInterface The middleware pipeline. |
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*/ |
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private MiddlewarePipelineInterface $pipeline; |
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private MiddlewareFactoryInterface $middlewareFactory; |
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/** |
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* @var array[]|callable[]|string[] |
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*/ |
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private array $middlewareDefinitions = []; |
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public function __construct(MiddlewareFactoryInterface $middlewareFactory, MiddlewarePipelineInterface $pipeline) |
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{ |
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$this->middlewareFactory = $middlewareFactory; |
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$this->pipeline = $pipeline; |
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} |
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/** |
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* Builds and handles a new middleware pipeline. All added middleware definitions are cleared. |
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* |
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* @param ServerRequestInterface $request |
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* @param RequestHandlerInterface $fallbackHandler |
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* |
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* @return ResponseInterface |
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*/ |
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public function dispatch(ServerRequestInterface $request, RequestHandlerInterface $fallbackHandler): ResponseInterface |
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{ |
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return $this->pipeline->build($this->buildMiddlewares(), $fallbackHandler)->handle($request); |
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} |
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/** |
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* @param array|callable|string $middlewareDefinition Name of PSR-15 middleware, |
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* a callable with `function(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface` |
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* signature or a handler action (an array of [handlerClass, handlerMethod]). For handler action and callable |
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* typed parameters are automatically injected using dependency injection container passed to the route. |
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* Current request and handler could be obtained by type-hinting for {@see ServerRequestInterface} |
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* and {@see RequestHandlerInterface}. |
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* |
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* @return self |
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*/ |
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public function add($middlewareDefinition): self |
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{ |
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$this->middlewareDefinitions[] = $middlewareDefinition; |
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return $this; |
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} |
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/** |
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* Creates middleware instances and clears middleware definitions. |
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* |
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* @return MiddlewareInterface[] |
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*/ |
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private function buildMiddlewares(): array |
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{ |
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$middlewares = []; |
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foreach ($this->middlewareDefinitions as $middlewareDefinition) { |
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$middlewares[] = $this->middlewareFactory->create($middlewareDefinition); |
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} |
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$this->middlewareDefinitions = []; |
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return $middlewares; |
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} |
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} |
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yiisoft /
middleware-dispatcher
