class InputManager
{
    public Vector2 CursorPosition;
    public event Action RightClick;

    void OnRightClick()
    {
        RightClick.Invoke();
    }
}

class Ghost
{
    private InputManager _input;

    public Ghost(InputManager _inputManager)
    {
        _input = _inputManager;
        _inputManager.RightClick += InputManagerOnRightClick;
    }

    private void InputManagerOnRightClick()
    {
        PlaceBuildingOnPosition(_input.CursorPosition);
    }

    void Tick()
    {
        this.position = _input.CursorPosition;
    }
}