Add GatewayController to handle redirections

src/Controller/GatewayController.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Controller;
+
+use ApiPlatform\Api\IriConverterInterface;
+use App\Library\Economy\Payment\GatewayLocator;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route('/v4/controllers')]
+class GatewayController extends AbstractController
+{
+    public function __construct(
+        private GatewayLocator $gatewayLocator,
+        private EntityManagerInterface $entityManager,
+        private IriConverterInterface $iriConverter
+    ) {
+    }
+
+    #[Route('/gateway_redirect', name: 'gateway_redirect')]
+    public function handleRedirect(Request $request): Response
+    {
+        $gateway = $this->gatewayLocator->getGateway($request->query->get('gateway'));
+        $checkout = $gateway->handleRedirect($request);
+
+        $this->entityManager->persist($checkout);
+        $this->entityManager->flush();
+
+        // TO-DO: This should redirect the user to a GUI
+        return new RedirectResponse($this->iriConverter->getIriFromResource($checkout));
+    }
+}