Sanguosha.UI.Controls.PlayerViewModel._UpdatePossibleRolesInternal C# (CSharp) Method

        private void _UpdatePossibleRolesInternal()
        {
            _possibleRoles.Clear();
            _possibleRoles.Add(Role.Unknown);
            if (GameModel != null && _player != null)
            {
                if (GameModel.Game is RoleGame)
                {
                    if (_player.Role == Role.Unknown)
                    {
                        foreach (Role role in roleGameRoles)
                        {
                            _possibleRoles.Add(role);
                        }
                    }
                    else if (_player.Role == Role.Ruler)
                    {
                        _possibleRoles.Clear();
                        _possibleRoles.Add(_player.Role);
                    }
                    else
                    {
                        _possibleRoles.Add(_player.Role);
                    }
                }
                else
                {
                    // @todo: add other possibilities here.
                }
            }
        }