Mezon Router: middleware and parameters modification

$parameters['_request'] = $request;
    $parameters['_body'] = json_decode($request->getContent(), true);

    return $parameters;    
});

// Second step. Ensure that we are logged in when we are in the private area
$router->registerMiddleware('*', function (string $route, array $parameters){
    // Is not a private area
    if (mb_strpos($route, '/user') !== 0 || empty($parameters['user_id'])) {
        return $parameters;
    }

    $token = $parameters['_request']->headers->get('oauth_token');

    $auth = new SomeAuth();
    $auth->validateTokenOrFail(
        $token,
        $parameters['user_id']
    );

    // We don't need to return nothing
});

// Last step. Now we will modify the parameters so the handler can work with them
$router->registerMiddleware('/user/[i:user_id]', function(string $route, array $parameters){
    $userModel = new UserModel();

    return $userModel->getUserById(
        $parameters['user_id']
    );
});

// Final destination. We have ended the middlewares, now we can work with the processed data
$router->addRoute('/user/[i:user_id]', function (UserObject $userObject){
    // Do everything
});

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