Add event emitter

events/EventEmitter.go

@@ -0,0 +1,43 @@
+package events
+
+type EventCallback func(args ...any)
+
+type Event struct {
+	Evtn     string
+	Callback EventCallback
+	Once     bool
+}
+
+type EventEmitter struct {
+	Events map[string][]Event
+}
+
+func NewEventEmitter() EventEmitter {
+	return EventEmitter{
+		Events: map[string][]Event{},
+	}
+}
+
+func (evt *EventEmitter) On(evtn string, callback EventCallback) {
+	if evt.Events[evtn] == nil {
+		evt.Events[evtn] = []Event{}
+	}
+
+	evt.Events[evtn] = append(evt.Events[evtn], Event{
+		Evtn:     evtn,
+		Callback: callback,
+		Once:     false,
+	})
+}
+
+func (evt *EventEmitter) Emit(evtn string, args ...any) {
+	if evt.Events[evtn] == nil {
+		return
+	}
+
+	for _, e := range evt.Events[evtn] {
+		if e.Callback != nil {
+			e.Callback(args...)
+		}
+	}
+}