/
event.go
47 lines (40 loc) · 1.13 KB
/
event.go
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package common
type EventType string
type EventHandler struct {
Listeners map[EventType][]chan interface{}
}
func NewEventHandler() *EventHandler {
return &EventHandler{make(map[EventType][]chan interface{})}
}
func (eh *EventHandler) AddListener(name EventType, ch chan interface{}) {
if eh.Listeners == nil {
eh.Listeners = make(map[EventType][]chan interface{})
}
if _, ok := eh.Listeners[name]; ok {
eh.Listeners[name] = append(eh.Listeners[name], ch)
} else {
eh.Listeners[name] = []chan interface{}{ch}
}
}
func (eh *EventHandler) RemoveListener(name EventType, ch chan interface{}) {
if _, ok := eh.Listeners[name]; ok {
for i := range eh.Listeners[name] {
if eh.Listeners[name][i] == ch {
eh.Listeners[name] = append(eh.Listeners[name][:i], eh.Listeners[name][i+1:]...)
break
}
}
}
}
func (eh *EventHandler) RemoveListenesr(name EventType) {
delete(eh.Listeners, name)
}
func (eh *EventHandler) Emit(name EventType, response string) {
if _, ok := eh.Listeners[name]; ok {
for _, handler := range eh.Listeners[name] {
go func(handler chan interface{}) {
handler <- response
}(handler)
}
}
}