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<?php |
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/** |
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* This file is part of the http-middleware package. |
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* |
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* Copyright (c) Dusan Vejin |
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* |
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* For full copyright and license information, please refer to the LICENSE file, |
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* located at the package root folder. |
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*/ |
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declare(strict_types=1); |
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namespace WeCodeIn\Http\ServerMiddleware; |
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use Interop\Http\Factory\ResponseFactoryInterface; |
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use Interop\Http\ServerMiddleware\DelegateInterface; |
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use Interop\Http\ServerMiddleware\MiddlewareInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use WeCodeIn\Http\ServerMiddleware\Exception\InvalidMiddlewareResponseException; |
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/** |
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* @author Dusan Vejin <[email protected]> |
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*/ |
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class Dispatcher implements DelegateInterface |
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{ |
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/** |
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* @var \SplPriorityQueue |
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*/ |
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protected $queue; |
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/** |
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* @var int |
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*/ |
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protected $serial = PHP_INT_MAX; |
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/** |
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* @var ResponseFactoryInterface |
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*/ |
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protected $responseFactory; |
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public function __construct(ResponseFactoryInterface $responseFactory) |
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{ |
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$this->queue = new \SplPriorityQueue(); |
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$this->responseFactory = $responseFactory; |
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} |
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public function insert(MiddlewareInterface $middleware, int $priority = 0) : Dispatcher |
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{ |
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$this->queue->insert($middleware, [$priority, $this->serial--]); |
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return $this; |
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} |
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public function extract() : MiddlewareInterface |
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{ |
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return $this->queue->extract(); |
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} |
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public function isEmpty() : bool |
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{ |
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return $this->queue->isEmpty(); |
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} |
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public function process(ServerRequestInterface $request) : ResponseInterface |
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{ |
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if ($this->isEmpty()) { |
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return $this->responseFactory->createResponse(); |
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} |
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$middleware = $this->extract(); |
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$response = $middleware->process($request, $this); |
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if (!$response instanceof ResponseInterface) { |
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throw new InvalidMiddlewareResponseException(sprintf( |
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'Middleware %s did not return a %s', get_class($middleware), ResponseInterface::class |
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)); |
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} |
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return $response; |
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} |
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public function __invoke(ServerRequestInterface $request) : ResponseInterface |
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{ |
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$delegate = clone $this; |
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return $delegate->process($request); |
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} |
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public function __clone() |
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{ |
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$this->queue = clone $this->queue; |
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} |
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} |
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wecodein /
http-middleware
