wip-feat: reduces env vars, adds getting-started page

src/User/Action/Handler/RegisterUserHandler.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace App\User\Action\Handler;
+
+use App\User\Action\Command\RegisterUserCommand;
+use App\User\Action\Result\RegisterUserResult;
+use App\User\Action\Result\SaveUserMediaPreferencesResult;
+use App\User\Framework\Entity\User;
+use App\User\Framework\Entity\UserPreference;
+use App\User\Framework\Repository\PreferencesRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use OneToMany\RichBundle\Contract\CommandInterface as C;
+use OneToMany\RichBundle\Contract\HandlerInterface;
+use OneToMany\RichBundle\Contract\ResultInterface as R;
+use Symfony\Component\PasswordHasher\Hasher\UserPasswordHasherInterface;
+
+/** @implements HandlerInterface<RegisterUserCommand> */
+class RegisterUserHandler implements HandlerInterface
+{
+    public function __construct(
+        private readonly EntityManagerInterface $entityManager,
+        private readonly PreferencesRepository $preferenceRepository,
+        private readonly UserPasswordHasherInterface $userPasswordHasher,
+    ) {}
+
+    public function handle(C $command): R
+    {
+        $user = new User();
+
+        $user->setUsername($command->username);
+        $user->setEmail($command->email);
+        $user->setPassword($this->userPasswordHasher->hashPassword($user, $command->password));
+        $user->setName($command->name);
+        $this->entityManager->persist($user);
+        $this->entityManager->flush();
+
+        $this->setUserPreferences($user, $this->preferenceRepository->findEnabled());
+        $this->entityManager->flush();
+
+        return new RegisterUserResult($user);
+    }
+
+    private function setUserPreferences(User $user, array $preferences): void
+    {
+        foreach ($preferences as $preference) {
+            $user->addUserPreference((new UserPreference())
+                ->setUser($user)
+                ->setPreference($preference)
+                ->setPreferenceValue(null)
+            );
+        }
+    }
+}