package lifetime

import "git.noahlan.cn/noahlan/nnet/entity"

type (
	Handler func(entity entity.NetworkEntity)

	Lifetime interface {
		OnClosed(h Handler)
		OnOpen(h Handler)
	}

	Mgr struct {
		onOpen   []Handler
		onClosed []Handler
	}
)

func NewLifetime() *Mgr {
	return &Mgr{
		onOpen:   make([]Handler, 0),
		onClosed: make([]Handler, 0),
	}
}

func (lt *Mgr) OnClosed(h Handler) {
	lt.onClosed = append(lt.onClosed, h)
}

func (lt *Mgr) OnOpen(h Handler) {
	lt.onOpen = append(lt.onOpen, h)
}

func (lt *Mgr) Open(entity entity.NetworkEntity) {
	if len(lt.onOpen) <= 0 {
		return
	}

	for _, handler := range lt.onOpen {
		handler(entity)
	}
}

func (lt *Mgr) Close(entity entity.NetworkEntity) {
	if len(lt.onClosed) <= 0 {
		return
	}

	for _, handler := range lt.onClosed {
		handler(entity)
	}
}