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<?php
/**
* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
* @link https://cakephp.org CakePHP(tm) Project
* @since 3.3.0
* @license https://opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\Http;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
/**
* Executes the middleware queue and provides the `next` callable
* that allows the queue to be iterated.
*/
class Runner
{
/**
* The current index in the middleware queue.
*
* @var int
*/
protected $index;
/**
* The middleware queue being run.
*
* @var \Cake\Http\MiddlewareQueue
*/
protected $middleware;
/**
* @param \Cake\Http\MiddlewareQueue $middleware The middleware queue
* @param \Psr\Http\Message\ServerRequestInterface $request The Server Request
* @param \Psr\Http\Message\ResponseInterface $response The response
* @return \Psr\Http\Message\ResponseInterface A response object
*/
public function run($middleware, ServerRequestInterface $request, ResponseInterface $response)
{
$this->middleware = $middleware;
$this->index = 0;
return $this->__invoke($request, $response);
}
/**
* @param \Psr\Http\Message\ServerRequestInterface $request The server request
* @param \Psr\Http\Message\ResponseInterface $response The response object
* @return \Psr\Http\Message\ResponseInterface An updated response
*/
public function __invoke(ServerRequestInterface $request, ResponseInterface $response)
{
$next = $this->middleware->get($this->index);
if ($next) {
$this->index++;
return $next($request, $response, $this);
}
// End of the queue
return $response;
}
}