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<?php |
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/** |
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* Phoole (PHP7.2+) |
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* |
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* @category Library |
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* @package Phoole\Middleware |
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* @copyright Copyright (c) 2019 Hong Zhang |
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*/ |
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declare(strict_types=1); |
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namespace Phoole\Middleware; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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/** |
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* Queue |
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* |
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* Queue of middlewares |
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* |
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* @package Phoole\Middleware |
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*/ |
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class Queue implements RequestHandlerInterface, MiddlewareInterface |
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{ |
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/** |
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* @var MiddlewareInterface[] |
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*/ |
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protected $middlewares = []; |
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/** |
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* @var RequestHandlerInterface |
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*/ |
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protected $defaultHandler; |
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/** |
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* Constructor |
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* |
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* @param RequestHandlerInterface $defaultHandler |
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*/ |
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public function __construct(RequestHandlerInterface $defaultHandler = null) |
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{ |
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$this->defaultHandler = $defaultHandler; |
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} |
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/** |
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* add middleware[s] to the queue |
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* |
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* @param MiddlewareInterface ...$middlewares |
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* @return $this |
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*/ |
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public function add(MiddlewareInterface ...$middlewares): Queue |
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{ |
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foreach ($middlewares as $m) { |
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$this->middlewares[] = $m; |
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} |
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return $this; |
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} |
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/** |
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* {@inheritDoc} |
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* |
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* @throws \LogicException if default handler not set |
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*/ |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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if (is_null($this->defaultHandler)) { |
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throw new \LogicException('default handler not set'); |
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} |
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$handler = $this->defaultHandler; |
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foreach (array_reverse($this->middlewares) as $middleware) { |
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$handler = new Handler($middleware, $handler); |
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} |
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return $handler->handle($request); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function process( |
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ServerRequestInterface $request, |
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RequestHandlerInterface $handler |
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): ResponseInterface { |
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$this->defaultHandler = $handler; |
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return $this->handle($request); |
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} |
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} |
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phoole /
middleware
