N1215\Jugoya\DelegateHandler

Complexity

Total Complexity

5

Size/Duplication

Total Lines	53
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	2

Test Coverage

Coverage

100%

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	8	2
A	addMiddleware()	0	4	1
A	handle()	0	14	2

<?php

namespace N1215\Jugoya;

use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;

final class DelegateHandler implements RequestHandlerInterface
{

    /**
     * @var RequestHandlerInterface
     */
    private $coreHandler;

    /**
     * @var MiddlewareInterface[]
     */
    private $middlewareStack = [];

    /**
     * @param RequestHandlerInterface $coreHandler
     * @param MiddlewareInterface[] $middlewareStack
     */
    public function __construct(RequestHandlerInterface $coreHandler, array $middlewareStack)
    {
        $this->coreHandler = $coreHandler;

        foreach ($middlewareStack as $middleware) {
            $this->addMiddleware($middleware);
        }
    }

    /**
     * @param MiddlewareInterface $middleware
     */
    private function addMiddleware(MiddlewareInterface $middleware)
    {
        $this->middlewareStack[] = $middleware;
    }

    /**
     * @param ServerRequestInterface $request
     * @return ResponseInterface
     */
    public function handle(ServerRequestInterface $request): ResponseInterface
    {
        $count = count($this->middlewareStack);
        if ($count === 0) {
            return $this->coreHandler->handle($request);
        }

        $innerDelegate = new self(
            $this->coreHandler,
            array_slice($this->middlewareStack, 1, $count - 1)
        );

        return $this->middlewareStack[0]->process($request, $innerDelegate);
    }
}