first commit

bus/bus.go

@@ -0,0 +1,48 @@
+package bus
+
+import "sync"
+
+// Subscriber represents a named handler for an event.
+type Subscriber struct {
+	Name    string
+	Handler func(any)
+}
+
+// CustomEventBus is a simple in-memory event bus using Go primitives.
+type CustomEventBus struct {
+	mu          sync.RWMutex
+	subscribers map[string][]Subscriber
+}
+
+func NewCustomEventBus() *CustomEventBus {
+	return &CustomEventBus{
+		subscribers: make(map[string][]Subscriber),
+	}
+}
+
+func (eb *CustomEventBus) Subscribe(event string, name string, handler func(any)) {
+	eb.mu.Lock()
+	defer eb.mu.Unlock()
+	eb.subscribers[event] = append(eb.subscribers[event], Subscriber{Name: name, Handler: handler})
+}
+
+func (eb *CustomEventBus) Publish(event string, data any) {
+	eb.mu.RLock()
+	subs := eb.subscribers[event]
+	eb.mu.RUnlock()
+	for _, sub := range subs {
+		go sub.Handler(data) // Run handlers asynchronously
+	}
+}
+
+func (eb *CustomEventBus) GetSubscribers() map[string][]string {
+	eb.mu.RLock()
+	defer eb.mu.RUnlock()
+	result := make(map[string][]string)
+	for event, subs := range eb.subscribers {
+		for _, sub := range subs {
+			result[event] = append(result[event], sub.Name)
+		}
+	}
+	return result
+}