init

internal/events/bus.go

@@ -0,0 +1,43 @@
+package events
+
+import (
+	"context"
+	"log"
+)
+
+type Bus struct {
+	subscribers map[chan *Event]struct{}
+}
+
+func NewBus() *Bus {
+	return &Bus{
+		subscribers: make(map[chan *Event]struct{}),
+	}
+}
+
+func (b *Bus) Subscribe(ctx context.Context) chan *Event {
+	ch := make(chan *Event, 100)
+	b.subscribers[ch] = struct{}{}
+	
+	go func() {
+		<-ctx.Done()
+		b.unsubscribe(ch)
+		close(ch)
+	}()
+	
+	return ch
+}
+
+func (b *Bus) Publish(event *Event) {
+	for ch := range b.subscribers {
+		select {
+		case ch <- event:
+		default:
+			log.Printf("Event channel full, dropping event: %s", event.ID)
+		}
+	}
+}
+
+func (b *Bus) unsubscribe(ch chan *Event) {
+	delete(b.subscribers, ch)
+}