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<?php |
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declare(strict_types=1); |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2018 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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namespace OAuth2Framework\IssuerDiscoveryBundle\Middleware; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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class Pipe implements MiddlewareInterface |
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{ |
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/** |
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* @var MiddlewareInterface[] |
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*/ |
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private $middlewares; |
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/** |
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* Dispatcher constructor. |
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* |
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* @param MiddlewareInterface[] $middlewares |
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*/ |
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public function __construct(array $middlewares = []) |
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{ |
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$this->middlewares = $middlewares; |
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} |
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/** |
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* Appends new middleware for this message bus. Should only be used at configuration time. |
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* |
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* @param MiddlewareInterface $middleware |
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*/ |
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public function appendMiddleware(MiddlewareInterface $middleware) |
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{ |
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$this->middlewares[] = $middleware; |
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} |
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/** |
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* Prepends new middleware for this message bus. Should only be used at configuration time. |
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* |
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* @param MiddlewareInterface $middleware |
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*/ |
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public function prependMiddleware(MiddlewareInterface $middleware) |
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{ |
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array_unshift($this->middlewares, $middleware); |
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} |
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/** |
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* @param MiddlewareInterface $middleware |
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*/ |
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public function addMiddlewareAfterFirstOne(MiddlewareInterface $middleware) |
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{ |
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$count = count($this->middlewares); |
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$temp = array_slice($this->middlewares, 1, $count); |
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array_unshift($temp, $middleware); |
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array_unshift($temp, $this->middlewares[0]); |
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$this->middlewares = $temp; |
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} |
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/** |
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* @param MiddlewareInterface $middleware |
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*/ |
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public function addMiddlewareBeforeLastOne(MiddlewareInterface $middleware) |
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{ |
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$count = count($this->middlewares); |
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$temp = array_slice($this->middlewares, 0, $count - 1); |
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$temp[] = $middleware; |
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$temp[] = $this->middlewares[$count - 1]; |
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$this->middlewares = $temp; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$this->middlewares[] = new RequestHandler(function (ServerRequestInterface $request) use ($handler) { |
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return $handler->handle($request); |
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}); |
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$response = $this->dispatch($request); |
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array_pop($this->middlewares); |
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return $response; |
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} |
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/** |
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* Dispatches the middleware and returns the resulting `ResponseInterface`. |
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* |
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* @param ServerRequestInterface $request |
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* |
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* @throws \LogicException on unexpected result from any middleware on the middlewares |
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* |
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* @return ResponseInterface |
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*/ |
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public function dispatch(ServerRequestInterface $request) |
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{ |
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$resolved = $this->resolve(0); |
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return $resolved->handle($request); |
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} |
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/** |
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* @param int $index Middleware index |
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* |
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* @return RequestHandlerInterface |
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*/ |
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private function resolve(int $index): RequestHandlerInterface |
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{ |
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if (isset($this->middlewares[$index])) { |
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$middleware = $this->middlewares[$index]; |
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return new RequestHandler(function (ServerRequestInterface $request) use ($middleware, $index) { |
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return $middleware->process($request, $this->resolve($index + 1)); |
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}); |
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} |
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return new RequestHandler(function () { |
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throw new \LogicException('Unresolved request: middleware exhausted with no result.'); |
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}); |
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} |
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} |
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OAuth2-Framework /
oauth2-framework
