jschreuder\Middle\Delegate

Complexity

Total Complexity

4

Size/Duplication

Total Lines	28
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Test Coverage

Coverage

90.91%

Importance

Changes	2
Bugs	0	Features	0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	process()	0	15	3

<?php declare(strict_types = 1);

namespace jschreuder\Middle;

use Interop\Http\ServerMiddleware\DelegateInterface;
use Interop\Http\ServerMiddleware\MiddlewareInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;

// @todo prevent calling ->process() twice
final class Delegate implements DelegateInterface
{
    /** @var  \SplStack */
    private $stack;

    private $called = false;

    public function __construct(\SplStack $stack)
    {
        $this->stack = $stack;
    }

    public function process(ServerRequestInterface $request): ResponseInterface
    {
        if ($this->stack->count() === 0) {
            throw new \RuntimeException('No more middleware\'s to call on.');
        }
        if ($this->called) {
            throw new \RuntimeException('Already processed, cannot be ran twice.');
        }

        /** @var  MiddlewareInterface $next */
        $next = $this->stack->pop();
        $this->called = true;

        return $next->process($request, new self($this->stack));
    }
}