twyrael/src/Controller/PrivateDiscussionController.php

<?php

namespace App\Controller;

use App\Entity\PrivateDiscussion;
use App\Entity\PrivateMessage;
use App\Entity\User;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;

class PrivateDiscussionController extends AbstractController
{
    #[Route('/private/discussion/{id}', name: 'private_discussion')]
    public function index($id, Request $request): Response
    {
        $session = $this->get('session');

        // Redirection sur le login si l'utilisateur n'est pas connecté
        if (null === $session->get('user')) {
            return  $this->redirectToRoute('login');
        }

        // Création du formulaire pour envoyer un message à l'utilisateur
        $formBuilder = $this->createFormBuilder();
        $formBuilder->add('text', \Symfony\Component\Form\Extension\Core\Type\TextType::class,['label' => 'Envoyer un message'])
            ->setAction($this->generateUrl('private_discussion', ['id' => $id]));
        $form = $formBuilder->getForm();

        // Obtention de la liste des messages privées correspondant à un utilisateur
        $em = $this->getDoctrine()->getManager();
        $repo_pd = $em->getRepository(PrivateDiscussion::class);
        $pd = $repo_pd->find($id);
        $messages = $pd->getPrivateMessages();

        // Envoi des messages à $user
        if ($request->getMethod() == 'POST') {
            $form->handleRequest($request);
            if($form->isValid()) {
                $user = $em->getRepository(User::class)->findOneBy(array('username' => $session->get('user')));
                $pm = new PrivateMessage();
                $pm->setText($form->get('text')->getData());
                $pm->setSender($user);
                $pm->setPrivateDiscussion($pd);
                $em->persist($pm);
                $em->flush();
            }
        }

        // Affichage de la vue
        return $this->render('private_discussion/index.html.twig', [
            'controller_name' => 'PrivateDiscussionController',
            'messages' => $messages,
            'form' => $form->createView(),
            'username' => $session->get('user'),
        ]);
    }
}