How to set an attribute to route definition in Slim4 and use it in a middleware - slim

Question

I need to set a custom attribute in the route definition and use it a route middleware. For example, I need to manage the refer page to redirect the user after the login.
This is my routes definition:
return function (App $app) {
$app->get('/', Home::class. ':home')->setName('home');
$app->get('/login', UserAction::class. ':getLogin')->setName('login')->setAttribute('norefer',true);
$app->post('/login', UserAction::class. ':postLogin');
};
The ->setAttribute('norefer',true); is what I'm looking for and seems it doesn't exist.
I need this attribute using ->getAttribute("norefer") in a middleware so I can store the last referable page visited by the user:
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
$routeContext = RouteContext::fromRequest($request);
$route = $routeContext->getRoute();
if (!empty($route) && !$routeContext->getRoute()->getAttribute("norefer")) {
$referName = $routeContext->getRoute()->getName();
$referArgs = $routeContext->getRoute()->getArguments();
$this->session->set("referName", $referName);
$this->session->set("referArgs", $referArgs);
}
return $handler->handle($request);
}
So, in the session I can store the last referable page and use it after the login process to redirect the user to his page.

Answer 1

You could add a NoRefererMiddleware to routes you want to exclude from the redirection logic. NoRefererMiddleware just sets a noreferer attribute to the request object if its called.
<?php
use App\Middleware\NoRefererMiddleware;
use Slim\App;
return function (App $app) {
$app->get('/', Home::class. ':home')->setName('home');
$app->get('/login', UserAction::class. ':getLogin')->setName('login')->add(NoRefererMiddleware::class);
$app->post('/login', UserAction::class. ':postLogin');
};
File: src/Middleware/NoRefererMiddleware.php
<?php
namespace App\Middleware;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
final class NoRefererMiddleware implements MiddlewareInterface
{
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
$request = $request->withAttribute('noreferer', true);
return $handler->handle($request);
}
}
Usage
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
$noReferer = $request->getAttribute('noreferer');
if ($noReferer !== true) {
$routeContext = RouteContext::fromRequest($request);
$route = $routeContext->getRoute();
if ($route !== null) {
$referName = $routeContext->getRoute()->getName();
$referArgs = $routeContext->getRoute()->getArguments();
$this->session->set('referName', $referName);
$this->session->set('referArgs', $referArgs);
}
}
return $handler->handle($request);
}