Laravel开发：如何使用Laravel Event Sourcing实现事件驱动应用程序？

class UserRegistered
{
    public string $userId;

    public string $name;

    public string $email;

    public function __construct(string $userId, string $name, string $email)
    {
        $this->userId = $userId;

        $this->name = $name;

        $this->email = $email;
    }
}

class UserRegisteredEventHandler
{
    public function __invoke(UserRegistered $event)
    {
        User::create([
            'id' => $event->userId,
            'name' => $event->name,
            'email' => $event->email,
        ]);
    }
}

class UserAggregateRoot extends AggregateRoot
{
    public function register(string $userId, string $name, string $email)
    {
        $this->recordThat(new UserRegistered($userId, $name, $email));
    }

    protected function applyUserRegistered(UserRegistered $event)
    {
        // 用户注册的状态变化
    }
}

$userAggregateRoot = new UserAggregateRoot();

$userAggregateRoot->register('123', 'Tom', 'tom@example.com');

class UserRepository
{
    public function getById(string $userId): User
    {
        $user = new User();

        $userAggregateRoot = new UserAggregateRoot();

        $eventStream = event()->getStreamById($userId);

        foreach ($eventStream as $event) {
            $userAggregateRoot->replay([$event]);

            $user = $userAggregateRoot->get();
        }

        return $user;
    }
}