feat(backend, logger): add start hook and notify frontend on start

Author: vasyl-ks

backend/cmd/main.go

@@ -199,6 +199,11 @@ func main() {
 	orderTopic := order_topic.NewSendTopic()
 	loggerTopic := logger_topic.NewEnableTopic()
 	loggerTopic.SetDataLogger(subloggers[data_logger.Name].(*data_logger.Logger))
+	loggerHandler.SetOnStart(func() {
+		if err := loggerTopic.NotifyStarted(); err != nil {
+			trace.Error().Err(err).Msg("failed to notify logger started")
+		}
+	})
 
 	messageTopic := message_topic.NewUpdateTopic()
 	stateOrderTopic := order_topic.NewState(idToBoard, trace.Logger)

backend/pkg/broker/topics/logger/enable.go

@@ -104,6 +104,11 @@ func (enable *Enable) handleVariables(_ websocket.ClientId, message *websocket.M
 	return nil
 }
 
+func (enable *Enable) NotifyStarted() error {
+	enable.isRunning.Store(true)
+	return enable.broadcastState()
+}
+
 func (enable *Enable) broadcastState() error {
 	payload, err := json.Marshal(enable.isRunning.Load())
 	if err != nil {

backend/pkg/logger/logger.go

@@ -24,6 +24,8 @@ type Logger struct {
 	subloggers map[abstraction.LoggerName]abstraction.Logger
 
 	trace zerolog.Logger
+
+	onStart func()
 }
 
 /**************
@@ -83,9 +85,17 @@ func (logger *Logger) Start() error {
 	}
 
 	logger.trace.Info().Msg("started")
+
+	if logger.onStart != nil {
+		logger.onStart()
+	}
 	return nil
 }
 
+func (logger *Logger) SetOnStart(cb func()) {
+	logger.onStart = cb
+}
+
 // PushRecord works as a proxy for the PushRecord method of the subloggers
 func (logger *Logger) PushRecord(record abstraction.LoggerRecord) error {