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<?php |
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declare(strict_types=1); |
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namespace Lit\Nimo\Middlewares; |
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use Lit\Nimo\Handlers\CallableHandler; |
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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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class MiddlewarePipe extends AbstractMiddleware |
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{ |
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/** |
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* @var CallableHandler |
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*/ |
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protected $nextHandler; |
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/** |
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* @var MiddlewareInterface[] |
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*/ |
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protected $stack = []; |
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protected $index; |
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public function __construct() |
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{ |
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$this->nextHandler = CallableHandler::wrap(function (ServerRequestInterface $request) { |
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return $this->loop($request); |
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}); |
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} |
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/** |
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* append $middleware |
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* return $this |
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* note this method would modify $this |
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* |
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* @param MiddlewareInterface $middleware |
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* @return $this |
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*/ |
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public function append(MiddlewareInterface $middleware): MiddlewarePipe |
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{ |
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$this->stack[] = $middleware; |
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return $this; |
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} |
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/** |
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* prepend $middleware |
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* return $this |
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* note this method would modify $this |
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* |
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* @param MiddlewareInterface $middleware |
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* @return $this |
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*/ |
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public function prepend(MiddlewareInterface $middleware): MiddlewarePipe |
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{ |
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array_unshift($this->stack, $middleware); |
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return $this; |
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} |
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protected function main(): ResponseInterface |
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{ |
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$this->index = 0; |
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return $this->loop($this->request); |
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} |
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/** |
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* @param ServerRequestInterface $request |
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* @return ResponseInterface |
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*/ |
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protected function loop(ServerRequestInterface $request): ResponseInterface |
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{ |
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if (!isset($this->stack[$this->index])) { |
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return $this->delegate($request); |
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} |
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return $this->stack[$this->index++]->process($request, $this->nextHandler); |
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} |
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} |
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LitPHP /
nimo
