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Delegate.php
64 lines (54 loc) · 1.28 KB
/
Delegate.php
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<?php
namespace Equip\Dispatch;
use Interop\Http\ServerMiddleware\DelegateInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
class Delegate implements DelegateInterface
{
/**
* @var array
*/
private $middleware;
/**
* @var callable
*/
private $default;
/**
* @var integer
*/
private $index = 0;
/**
* @param array $middleware
* @param callable $default
*/
public function __construct(array $middleware, callable $default)
{
$this->middleware = $middleware;
$this->default = $default;
}
/**
* Process the request using the current middleware.
*
* @param RequestInterface $request
*
* @return ResponseInterface
*/
public function process(ServerRequestInterface $request)
{
if (empty($this->middleware[$this->index])) {
return call_user_func($this->default, $request);
}
return $this->middleware[$this->index]->process($request, $this->nextDelegate());
}
/**
* Get a delegate pointing to the next middleware.
*
* @return static
*/
private function nextDelegate()
{
$copy = clone $this;
$copy->index++;
return $copy;
}
}