chillerlan\HTTP\Psr15\QueueRunner

Complexity

Total Complexity

4

Size/Duplication

Total Lines	34
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	3	1
A	getMiddleware()	0	2	1
A	handle()	0	7	2

<?php
/**
 * Class QueueRunner
 *
 * @link         https://www.php-fig.org/psr/psr-15/meta/
 *
 * @created      10.03.2019
 * @author       smiley <smiley@chillerlan.net>
 * @copyright    2019 smiley
 * @license      MIT
 */

namespace chillerlan\HTTP\Psr15;

use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Message\{ResponseInterface, ServerRequestInterface};
use Psr\Http\Server\RequestHandlerInterface;

use function array_pop;

class QueueRunner implements RequestHandlerInterface{

	/** @var \Psr\Http\Server\MiddlewareInterface[] */
	protected array                   $middlewareStack;
	protected RequestHandlerInterface $fallbackHandler;

	/**
	 *  constructor.
	 *
	 * @param \Psr\Http\Server\MiddlewareInterface[]   $middlewareStack
	 * @param \Psr\Http\Server\RequestHandlerInterface $fallbackHandler
	 */
	public function __construct(array $middlewareStack, RequestHandlerInterface $fallbackHandler){
		$this->middlewareStack = $middlewareStack;
		$this->fallbackHandler = $fallbackHandler;
	}

	/**
	 * @inheritDoc
	 */
	public function handle(ServerRequestInterface $request):ResponseInterface{

		if(empty($this->middlewareStack)){
			return $this->fallbackHandler->handle($request);
		}

		return $this->getMiddleware()->process($request, $this);
	}

	/**
	 *
	 */
	protected function getMiddleware():MiddlewareInterface{
		return array_pop($this->middlewareStack);
	}

}