add config reloading via API endpoint and more WS work

events.go

@@ -16,16 +16,28 @@ func (e Event) toJSON() ([]byte, error) {
 	return json.Marshal(e)
 }
 
-func (r *Router) handleEvent(event Event) {
+func (r *Router) handleEvent(event Event, sender *websocket.Conn) {
 	switch event.Type {
 	case "ping":
-		r.broadcastEvent(Event{Type: "pong"})
+		r.unicastEvent(Event{Type: "pong"}, sender)
 	default:
 		r.logger.Warn("unknown event type", "eventType", event.Type)
 	}
 }
 
-func (r *Router) broadcastEvent(event Event) {
+func (r *Router) unicastEvent(event Event, conn *websocket.Conn) {
+	eventJSON, err := event.toJSON()
+	if err != nil {
+		r.logger.Error("failed to marshal event to JSON", "error", err)
+		return
+	}
+	err = conn.WriteMessage(websocket.TextMessage, eventJSON)
+	if err != nil {
+		r.logger.Error("failed to write message to websocket connection", "error", err)
+	}
+}
+
+func (r *Router) broadcastEvent(event Event, excluded ...*websocket.Conn) {
 	eventJSON, err := event.toJSON()
 	if err != nil {
 		r.logger.Error("failed to marshal event to JSON", "error", err)
@@ -34,6 +46,16 @@ func (r *Router) broadcastEvent(event Event) {
 	r.wsConnsMu.Lock()
 	defer r.wsConnsMu.Unlock()
 	for _, conn := range r.wsConns {
+		exclude := false
+		for _, excludedConn := range excluded {
+			if conn == excludedConn {
+				exclude = true
+				break
+			}
+		}
+		if exclude {
+			continue
+		}
 		err := conn.WriteMessage(websocket.TextMessage, eventJSON)
 		if err != nil {
 			r.logger.Error("failed to write message to websocket connection", "error", err)