package events

import "sync"

var eventsMap = map[string][]func(){} // event => []callbacks
var locker = sync.Mutex{}

// 增加事件回调
func On(event string, callback func()) {
	locker.Lock()
	defer locker.Unlock()

	callbacks, _ := eventsMap[event]
	callbacks = append(callbacks, callback)
	eventsMap[event] = callbacks
}

// 通知事件
func Notify(event string) {
	locker.Lock()
	callbacks, _ := eventsMap[event]
	locker.Unlock()
	
	for _, callback := range callbacks {
		callback()
	}
}