private void Apply(UserJoinedGameEvent @event)
{
_users.Add(@event.UserId);
}
public Game AddUser(Guid userId)
{
if (_users.Any(id => userId == id))
{
throw new InvalidOperationException("User is already in game.");
}
if (IsFull())
{
throw new InvalidOperationException("Game is full.");
}
var userJoinedEvent = new UserJoinedGameEvent(Guid.NewGuid(), Id, userId, Version + 1);
RaiseEvent(userJoinedEvent);
return this;
}