feat: add notify icon read

internal/eventbus/bus.go

@@ -0,0 +1,50 @@
+package eventbus
+
+import "sync"
+
+// Event 统一定义的事件体内包含的数据
+type Event struct {
+	Type    string
+	Payload interface{}
+}
+
+// Handler 事件具体的执行句柄
+type Handler func(event Event)
+
+// Subscriber 事件订阅者接口，各业务 Service 若关注系统总线可实现此接口
+type Subscriber interface {
+	SubscribeEvents(bus *EventBus)
+}
+
+type EventBus struct {
+	handlers map[string][]Handler
+	mu       sync.RWMutex
+}
+
+func New() *EventBus {
+	return &EventBus{
+		handlers: make(map[string][]Handler),
+	}
+}
+
+// Subscribe 注册订阅事件
+func (bus *EventBus) Subscribe(eventType string, handler Handler) {
+	bus.mu.Lock()
+	defer bus.mu.Unlock()
+	bus.handlers[eventType] = append(bus.handlers[eventType], handler)
+}
+
+// Publish 异步抛出事件
+func (bus *EventBus) Publish(event Event) {
+	bus.mu.RLock()
+	handlers := bus.handlers[event.Type]
+	bus.mu.RUnlock()
+
+	for _, handler := range handlers {
+		// 采用 Goroutine 异步不阻塞核心主线
+		go handler(event)
+	}
+}
+
+// 全局唯一的事件总线实例
+var DefaultBus = New()