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<?php |
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namespace N1215\Jugoya; |
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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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class MiddlewareStack 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 $stack = []; |
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/** |
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* @param MiddlewareInterface[] $queue |
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*/ |
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public function __construct(array $queue) |
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{ |
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foreach ($queue as $middleware) { |
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$this->add($middleware); |
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} |
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} |
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/** |
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* @param MiddlewareInterface $middleware |
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* @return MiddlewareStack |
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*/ |
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private function add(MiddlewareInterface $middleware) |
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{ |
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$this->stack[] = $middleware; |
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return $this; |
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} |
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/** |
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* @param ServerRequestInterface $request |
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* @param DelegateInterface $delegate |
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* @return ResponseInterface |
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*/ |
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public function process(ServerRequestInterface $request, DelegateInterface $delegate) |
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{ |
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$count = count($this->stack); |
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if ($count === 0) { |
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return $delegate->process($request); |
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} |
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if ($count === 1) { |
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return $this->stack[0]->process($request, $delegate); |
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} |
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/** @var DelegateInterface $stackDelegate */ |
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$stackDelegate = array_reduce( |
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array_reverse($this->stack), |
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function(DelegateInterface $delegate, MiddlewareInterface $middleware) { |
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return new HttpApplication($delegate, new MiddlewareStack([$middleware])); |
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}, |
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$delegate |
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); |
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return $stackDelegate->process($request); |
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} |
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} |
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n1215 /
jugoya
