chore: 并入 iotlcm-app 历史到 app/（原提交 f40bda9）

app/server/internal/library/event/event.go

@@ -0,0 +1,75 @@
+// Package event
+// @Link  https://github.com/xiujiecn/xiu-admin
+// @Copyright  Copyright (c) 2025 LiXiujie
+// @Author  Lxj <li@example.com>
+// @License  https://github.com/xiujiecn/xiu-admin/blob/master/LICENSE
+package event
+
+import (
+	"context"
+	"sync"
+)
+
+type EventCallbackFunc func(ctx context.Context, eventKey string, args ...interface{})
+
+type sEvent struct {
+	sync.Mutex
+	eventList map[string][]EventCallbackFunc // 事件列表 [事件Key]:回调函数
+}
+
+var (
+	instance *sEvent
+	once     sync.Once
+)
+
+// EventsInstance 事件实例
+func EventsInstance() *sEvent {
+	once.Do(func() {
+		instance = &sEvent{
+			eventList: make(map[string][]EventCallbackFunc),
+		}
+	})
+	return instance
+}
+
+// Register 注册事件
+func (e *sEvent) Register(eventKey interface{}, callback EventCallbackFunc) {
+	e.Lock()
+	defer e.Unlock()
+	eventKeyStr, ok1 := eventKey.(string)
+	eventKeyList, ok2 := eventKey.([]string)
+	if !ok1 && !ok2 {
+		return
+	}
+	if ok1 {
+		e.eventList[eventKeyStr] = append(e.eventList[eventKeyStr], callback)
+	} else {
+		for _, eventKey := range eventKeyList {
+			e.eventList[eventKey] = append(e.eventList[eventKey], callback)
+		}
+	}
+}
+
+// Call 回调事件
+func (e *sEvent) Call(ctx context.Context, eventKey string, args ...interface{}) {
+	if events, ok := e.eventList[eventKey]; ok {
+		for _, f := range events {
+			f(ctx, eventKey, args...)
+		}
+	}
+}
+
+// Emit 触发事件
+func (e *sEvent) Emit(ctx context.Context, eventKey string, args ...interface{}) {
+	e.Call(ctx, eventKey, args...)
+}
+
+// Remove 删除事件
+func (e *sEvent) Remove(eventKey string) {
+	delete(e.eventList, eventKey)
+}
+
+// Clear 清空事件列表
+func (e *sEvent) Clear() {
+	e.eventList = make(map[string][]EventCallbackFunc)
+}