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<?php
namespace Northwoods\Broker;
use Interop\Http\ServerMiddleware\DelegateInterface;
use Psr\Http\Message\ServerRequestInterface;
use SplObjectStorage;
class Delegate implements DelegateInterface
{
/**
* @var SplObjectStorage
*/
private $middleware;
* @var DelegateInterface $nextDelegate
private $nextDelegate;
public function __construct(SplObjectStorage $middleware, DelegateInterface $nextDelegate)
$this->middleware = clone $middleware;
$this->nextDelegate = $nextDelegate;
// Rewind the middleware to the start
$this->middleware->rewind();
}
// DelegateInterface
public function process(ServerRequestInterface $request)
/** @var MiddlewareInterface */
$middleware = $this->middleware->current();
if (empty($middleware)) {
return $this->nextDelegate->process($request);
/** @var callable */
$condition = $this->middleware[$middleware];
/** @var DelegateInterface */
$delegate = $this->nextDelegate();
if ($condition($request)) {
return $middleware->process($request, $delegate);
} else {
return $delegate->process($request);
* @return DelegateInterface
private function nextDelegate()
$copy = clone $this;
$copy->middleware->next();
return $copy;
northwoods /
broker
