package game

type areaEffect interface {
	onEntering(Permanent)
	onLeaving(Permanent)
}

type dynamicAreaEffect struct {
	_onEntering func(Permanent)
	_onLeaving  func(Permanent)
}

func newDynamicAreaEffect(enter func(Permanent), leave func(Permanent)) *dynamicAreaEffect {
	return &dynamicAreaEffect{enter, leave}
}

func (e *dynamicAreaEffect) onEntering(p Permanent) {
	if e._onEntering != nil {
		e._onEntering(p)
	}
}

func (e *dynamicAreaEffect) onLeaving(p Permanent) {
	if e._onLeaving != nil {
		e._onLeaving(p)
	}
}