<?php
class CheckFromMW
{
    /**
     * Example middleware invokable class
     *
     * @param  \Psr\Http\Message\ServerRequestInterface $request  PSR7 request
     * @param  \Psr\Http\Message\ResponseInterface      $response PSR7 response
     * @param  callable                                 $next     Next middleware
     *
     * @return \Psr\Http\Message\ResponseInterface
     */
    public function __invoke($request, $response, $next)
    {
        $currentRefererRequest = $request->getHost();
		$currentRefererRequest = substr($currentRefererRequest, 7); //Senza http://
		$indexDoublePoint = strpos($currentRefererRequest, ':');
		$indexFirstSlash = strpos($currentRefererRequest, '/');
		$currentRefererRequest = substr($currentRefererRequest, 0, $indexDoublePoint > 0 && $indexDoublePoint < $indexFirstSlash ? $indexDoublePoint : $indexFirstSlash );
		if(!in_array($currentRefererRequest, $allowedHost))
		{
			return $response->withStatus(500)->write('Generic error occurred');
		}
		*/
		$currentHostRequest = $app->request()->getHost();
		if(!in_array($currentHostRequest, $allowedHost))
		{
			return $response->withStatus(403)->write('Request arrive from host not allowed');
		}

        return $next($request, $response);
    }
}