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<?php |
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namespace Northwoods\Broker; |
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use Interop\Http\Server\MiddlewareInterface; |
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use Interop\Http\Server\RequestHandlerInterface; |
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use Psr\Container\ContainerInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use SplObjectStorage; |
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class RequestHandler implements RequestHandlerInterface |
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{ |
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/** |
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* @var array |
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*/ |
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private $middleware; |
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/** |
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* @var RequestHandlerInterface $nextRequestHandler |
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*/ |
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private $nextRequestHandler; |
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/** |
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* @var ContainerInterface |
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*/ |
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private $container; |
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/** |
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* @var int |
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*/ |
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private $index = 0; |
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public function __construct(array $middleware, RequestHandlerInterface $nextRequestHandler, ContainerInterface $container = null) |
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{ |
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$this->middleware = $middleware; |
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$this->nextRequestHandler = $nextRequestHandler; |
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$this->container = $container; |
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} |
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// RequestHandlerInterface |
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public function handle(ServerRequestInterface $request) |
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{ |
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if (empty($this->middleware[$this->index])) { |
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return $this->nextRequestHandler->handle($request); |
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} |
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/** @var callable */ |
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$condition = $this->middleware[$this->index][0]; |
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/** @var MiddlewareInterface|string */ |
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$middleware = $this->middleware[$this->index][1]; |
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/** @var RequestHandlerInterface */ |
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$handler = $this->nextRequestHandler(); |
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if ($condition($request)) { |
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return $this->resolveMiddleware($middleware)->process($request, $handler); |
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} else { |
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return $handler->handle($request); |
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} |
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} |
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/** |
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* @return RequestHandlerInterface |
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*/ |
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private function nextRequestHandler() |
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{ |
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$copy = clone $this; |
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$copy->index++; |
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return $copy; |
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} |
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/** |
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* @param string|MiddlewareInterface $middleware |
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* @return MiddlewareInterface |
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*/ |
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private function resolveMiddleware($middleware) |
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{ |
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if ($middleware instanceof MiddlewareInterface) { |
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return $middleware; |
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} |
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return $this->container->get($middleware); |
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} |
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} |
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northwoods /
broker
