add /register

src/Controller/RegistrationController.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Controller;
+
+use App\Entity\User;
+use App\Form\RegistrationFormType;
+use App\Security\Authenticator;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\PasswordHasher\Hasher\UserPasswordHasherInterface;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Security\Http\Authentication\UserAuthenticatorInterface;
+
+class RegistrationController extends AbstractController
+{
+    #[Route('/register', name: 'app_register')]
+    public function register(Request $request, UserPasswordHasherInterface $userPasswordHasher, UserAuthenticatorInterface $userAuthenticator, Authenticator $authenticator, EntityManagerInterface $entityManager): Response
+    {
+        $user = new User();
+        $form = $this->createForm(RegistrationFormType::class, $user);
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            // encode the plain password
+            $user->setPassword(
+                $userPasswordHasher->hashPassword(
+                    $user,
+                    $form->get('plainPassword')->getData()
+                )
+            );
+
+            $entityManager->persist($user);
+            $entityManager->flush();
+            // do anything else you need here, like send an email
+
+            return $userAuthenticator->authenticateUser(
+                $user,
+                $authenticator,
+                $request
+            );
+        }
+
+        return $this->render('registration/register.html.twig', [
+            'registrationForm' => $form->createView(),
+        ]);
+    }
+}

src/Entity/User.php

@@ -4,10 +4,12 @@ namespace App\Entity;
 
 use App\Repository\UserRepository;
 use Doctrine\ORM\Mapping as ORM;
+use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 use Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface;
 use Symfony\Component\Security\Core\User\UserInterface;
 
 #[ORM\Entity(repositoryClass: UserRepository::class)]
+#[UniqueEntity(fields: ['username'], message: 'There is already an account with this username')]
 class User implements UserInterface, PasswordAuthenticatedUserInterface
 {
     #[ORM\Id]

src/Form/RegistrationFormType.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace App\Form;
+
+use App\Entity\User;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
+use Symfony\Component\Form\Extension\Core\Type\PasswordType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Component\Validator\Constraints\IsTrue;
+use Symfony\Component\Validator\Constraints\Length;
+use Symfony\Component\Validator\Constraints\NotBlank;
+
+class RegistrationFormType extends AbstractType
+{
+    public function buildForm(FormBuilderInterface $builder, array $options): void
+    {
+        $builder
+            ->add('username')
+            ->add('agreeTerms', CheckboxType::class, [
+                                'mapped' => false,
+                'constraints' => [
+                    new IsTrue([
+                        'message' => 'You should agree to our terms.',
+                    ]),
+                ],
+            ])
+            ->add('plainPassword', PasswordType::class, [
+                                // instead of being set onto the object directly,
+                // this is read and encoded in the controller
+                'mapped' => false,
+                'attr' => ['autocomplete' => 'new-password'],
+                'constraints' => [
+                    new NotBlank([
+                        'message' => 'Please enter a password',
+                    ]),
+                    new Length([
+                        'min' => 6,
+                        'minMessage' => 'Your password should be at least {{ limit }} characters',
+                        // max length allowed by Symfony for security reasons
+                        'max' => 4096,
+                    ]),
+                ],
+            ])
+        ;
+    }
+
+    public function configureOptions(OptionsResolver $resolver): void
+    {
+        $resolver->setDefaults([
+            'data_class' => User::class,
+        ]);
+    }
+}

src/Security/Authenticator.php

@@ -49,8 +49,7 @@ class Authenticator extends AbstractLoginFormAuthenticator
         }
 
         // For example:
-        // return new RedirectResponse($this->urlGenerator->generate('some_route'));
-        throw new \Exception('TODO: provide a valid redirect inside '.__FILE__);
+        return new RedirectResponse($this->urlGenerator->generate('index'));
     }
 
     protected function getLoginUrl(Request $request): string

templates/registration/register.html.twig

@@ -0,0 +1,19 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Register{% endblock %}
+
+{% block body %}
+    <h1>Register</h1>
+
+    {{ form_errors(registrationForm) }}
+
+    {{ form_start(registrationForm) }}
+        {{ form_row(registrationForm.username) }}
+        {{ form_row(registrationForm.plainPassword, {
+            label: 'Password'
+        }) }}
+        {{ form_row(registrationForm.agreeTerms) }}
+
+        <button type="submit" class="btn">Register</button>
+    {{ form_end(registrationForm) }}
+{% endblock %}