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<?php |
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declare(strict_types=1); |
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namespace Shoot\Shoot; |
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use Psr\Http\Message\ServerRequestInterface; |
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8
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final class Pipeline |
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{ |
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/** @var callable */ |
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private $middleware; |
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/** @var ServerRequestInterface */ |
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private $request; |
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/** |
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* @param MiddlewareInterface[] $middleware |
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*/ |
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public function __construct(array $middleware = []) |
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{ |
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$this->middleware = $this->chainMiddleware($middleware); |
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} |
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/** |
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* During the execution of the callback, any middleware in the pipeline will have access to the given request |
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* object. |
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* |
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* @param ServerRequestInterface $request The current HTTP request being handled. |
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* @param callable $callback A callback which should call Twig to render the root template. |
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* |
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* @return mixed The result as returned by the callback (if any). |
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*/ |
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public function withRequest(ServerRequestInterface $request, callable $callback) |
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{ |
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try { |
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$this->request = $request; |
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return $callback(); |
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} finally { |
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$this->request = null; |
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} |
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} |
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/** |
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* @param View $view |
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* |
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* @return void |
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*/ |
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public function process(View $view) |
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{ |
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if ($this->request === null) { |
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1 |
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throw new MissingRequestException('Cannot process a view without a request set. This method should be called from the callback passed to Pipeline::withRequest'); |
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} |
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call_user_func($this->middleware, $view); |
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} |
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/** |
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* Chains the middleware into a single callable. |
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* |
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* @param MiddlewareInterface[] $middleware |
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* |
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* @return callable |
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*/ |
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private function chainMiddleware(array $middleware): callable |
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{ |
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$middleware = array_reverse($middleware); |
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return array_reduce($middleware, function (callable $next, MiddlewareInterface $middleware) { |
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8 |
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return function (View $view) use ($middleware, $next): View { |
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return $middleware->process($view, $this->request, $next); |
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}; |
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}, function (View $view): View { |
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try { |
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$view->render(); |
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return $view; |
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} catch (SuppressedException $exception) { |
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return $view->withSuppressedException($exception->getPrevious()); |
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} |
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}); |
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} |
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} |
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shootphp /
shoot
