fix(go): flatten jt808 additional fields

go/vehicle-gateway/internal/protocol/jt808/parser.go

@@ -30,14 +30,7 @@ type Location struct {
 	DirectionDeg   uint16
 	Time           time.Time
 	TotalMileageKM *float64
-	Additional     []AdditionalItem
+	Additional     map[string]any
-}
-
-type AdditionalItem struct {
-	ID       byte
-	Length   int
-	ValueHex string
-	Parsed   any
 }
 
 // ExtractFrames splits JT/T 808 TCP streams by 0x7e delimiters and unescapes
@@ -311,88 +304,70 @@ func parseLocation(body []byte) (Location, error) {
 	return location, nil
 }
 
-func parseAdditional(data []byte, location *Location) []AdditionalItem {
+func parseAdditional(data []byte, location *Location) map[string]any {
-	var out []AdditionalItem
+	out := map[string]any{}
 	for len(data) >= 2 {
 		id := data[0]
 		size := int(data[1])
 		data = data[2:]
 		if len(data) < size {
-			out = append(out, AdditionalItem{
-				ID:       id,
-				Length:   size,
-				ValueHex: strings.ToUpper(hex.EncodeToString(data)),
-				Parsed:   "truncated",
-			})
 			return out
 		}
 		value := data[:size]
-		item := AdditionalItem{
+		var parsed map[string]any
-			ID:       id,
-			Length:   size,
-			ValueHex: strings.ToUpper(hex.EncodeToString(value)),
-		}
 		switch {
 		case id == 0x01 && size == 4:
 			rawMileage := binary.BigEndian.Uint32(value)
 			mileage := float64(rawMileage) / 10
 			location.TotalMileageKM = &mileage
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  envelope.FieldTotalMileageKM,
-				"raw_value_tenth_km": rawMileage,
 				"value": mileage,
-				"unit":               "km",
 			}
 		case id == 0x02 && size == 2:
 			rawFuel := binary.BigEndian.Uint16(value)
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  "fuel_l",
-				"raw_value_tenth_l": rawFuel,
 				"value": float64(rawFuel) / 10,
-				"unit":              "L",
 			}
 		case id == 0x03 && size == 2:
 			rawSpeed := binary.BigEndian.Uint16(value)
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  "recorder_speed_kmh",
-				"raw_value_tenth_kmh": rawSpeed,
 				"value": float64(rawSpeed) / 10,
-				"unit":                "km/h",
 			}
 		case id == 0x04 && size == 2:
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  "manual_alarm_event_id",
 				"value": binary.BigEndian.Uint16(value),
 			}
 		case id == 0x05 && size == 30:
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":   "tire_pressure",
 				"values": parseTirePressure(value),
 			}
 		case id == 0x06 && size == 2:
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  "carriage_temperature_c",
 				"value": int16(binary.BigEndian.Uint16(value)),
-				"unit":  "C",
 			}
 		case id == 0x11 && (size == 1 || size == 5):
-			parsed := map[string]any{
+			parsed = map[string]any{
 				"name":          "overspeed_alarm",
 				"location_type": value[0],
 			}
 			if size == 5 {
 				parsed["area_id"] = binary.BigEndian.Uint32(value[1:5])
 			}
-			item.Parsed = parsed
 		case id == 0x12 && size == 6:
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":          "area_route_alarm",
 				"location_type": value[0],
 				"area_id":       binary.BigEndian.Uint32(value[1:5]),
 				"direction":     value[5],
 			}
 		case id == 0x13 && size == 7:
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":                       "road_section_driving_time_alarm",
 				"road_section_id":            binary.BigEndian.Uint32(value[0:4]),
 				"driving_time_seconds":       binary.BigEndian.Uint16(value[4:6]),
@@ -402,38 +377,38 @@ func parseAdditional(data []byte, location *Location) []AdditionalItem {
 			}
 		case id == 0x25 && size == 4:
 			rawStatus := binary.BigEndian.Uint32(value)
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  "extended_vehicle_signal_status",
 				"value": rawStatus,
 				"bits":  parseExtendedVehicleSignal(rawStatus),
 			}
 		case id == 0x2a && size == 2:
 			rawStatus := binary.BigEndian.Uint16(value)
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  "io_status",
 				"value": rawStatus,
 				"bits":  parseIOStatus(rawStatus),
 			}
 		case id == 0x2b && size == 4:
 			analog := binary.BigEndian.Uint32(value)
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  "analog",
 				"ad0":   analog & 0xffff,
 				"ad1":   analog >> 16,
 				"value": analog,
 			}
 		case id == 0x30 && size == 1:
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  "network_signal_strength",
 				"value": value[0],
 			}
 		case id == 0x31 && size == 1:
-			item.Parsed = map[string]any{
+			parsed = map[string]any{
 				"name":  "gnss_satellite_count",
 				"value": value[0],
 			}
 		}
-		out = append(out, item)
+		addParsedAdditional(out, parsed)
 		data = data[size:]
 	}
 	return out
@@ -448,7 +423,6 @@ func locationToMap(location Location) map[string]any {
 		"altitude_m":    location.AltitudeM,
 		"speed_kmh":     location.SpeedKMH,
 		"direction_deg": location.DirectionDeg,
-		"additional":    additionalToMaps(location.Additional),
 	}
 	if !location.Time.IsZero() {
 		out["device_time"] = location.Time.Format(time.RFC3339)
@@ -456,23 +430,38 @@ func locationToMap(location Location) map[string]any {
 	if location.TotalMileageKM != nil {
 		out[envelope.FieldTotalMileageKM] = *location.TotalMileageKM
 	}
+	for key, value := range location.Additional {
+		out[key] = value
+	}
 	return out
 }
 
-func additionalToMaps(items []AdditionalItem) []map[string]any {
+func addParsedAdditional(out map[string]any, parsed map[string]any) {
-	out := make([]map[string]any, 0, len(items))
+	if parsed == nil {
-	for _, item := range items {
+		return
-		value := map[string]any{
-			"id":        fmt.Sprintf("0x%02X", item.ID),
-			"length":    item.Length,
-			"value_hex": item.ValueHex,
 	}
-		if item.Parsed != nil {
+	name, ok := parsed["name"].(string)
-			value["parsed"] = item.Parsed
+	if !ok || name == "" {
+		return
 	}
-		out = append(out, value)
+	if value, ok := parsed["value"]; ok && len(parsed) <= 2 {
+		out[name] = value
+		return
 	}
-	return out
+	value := make(map[string]any, len(parsed)-1)
+	for key, item := range parsed {
+		if key == "name" {
+			continue
+		}
+		value[key] = item
+	}
+	if len(value) == 1 {
+		if singleValue, ok := value["value"]; ok {
+			out[name] = singleValue
+			return
+		}
+	}
+	out[name] = value
 }
 
 func parseTirePressure(data []byte) []map[string]any {

go/vehicle-gateway/internal/protocol/jt808/parser_test.go

@@ -57,19 +57,14 @@ func TestExtractFramesUnescapesAndParsesLocationWithTotalMileage(t *testing.T) {
 	if !ok {
 		t.Fatalf("parsed location missing: %#v", env.Parsed)
 	}
-	additional, ok := location["additional"].([]map[string]any)
+	if _, ok := location["additional"]; ok {
-	if !ok || len(additional) == 0 {
+		t.Fatalf("additional wrapper should not be exposed: %#v", location["additional"])
-		t.Fatalf("additional fields missing: %#v", location["additional"])
 	}
-	if additional[0]["id"] != "0x01" || additional[0]["value_hex"] != "0001900C" {
+	if location[envelope.FieldTotalMileageKM] != 10241.2 {
-		t.Fatalf("unexpected first additional item: %#v", additional[0])
+		t.Fatalf("mileage should be flattened on location: %#v", location)
 	}
-	parsed, ok := additional[0]["parsed"].(map[string]any)
+	if _, ok := location["raw_value_tenth_km"]; ok {
-	if !ok {
+		t.Fatalf("raw mileage helper should not be exposed: %#v", location)
-		t.Fatalf("mileage parsed field missing: %#v", additional[0])
-	}
-	if parsed["raw_value_tenth_km"] != uint32(102412) || parsed["value"] != 10241.2 {
-		t.Fatalf("unexpected mileage parsed value: %#v", parsed)
 	}
 }
 
@@ -148,32 +143,38 @@ func TestParseFrameParsesCommonLocationAdditionalItems(t *testing.T) {
 	}
 	assertFloatField(t, env, envelope.FieldTotalMileageKM, 1.1)
 
-	location := env.Parsed["location"].(map[string]any)
+	location, ok := env.Parsed["location"].(map[string]any)
-	additional := location["additional"].([]map[string]any)
+	if !ok {
-	byID := map[string]map[string]any{}
+		t.Fatalf("location missing: %#v", env.Parsed)
-	for _, item := range additional {
-		byID[item["id"].(string)] = item["parsed"].(map[string]any)
 	}
-	if byID["0x01"]["raw_value_tenth_km"] != uint32(11) || byID["0x01"]["value"] != 1.1 {
+	if _, ok := location["additional"]; ok {
-		t.Fatalf("mileage parsed = %#v", byID["0x01"])
+		t.Fatalf("additional wrapper should not be exposed: %#v", location["additional"])
 	}
-	if byID["0x05"]["name"] != "tire_pressure" {
+	if location[envelope.FieldTotalMileageKM] != 1.1 {
-		t.Fatalf("tire pressure missing: %#v", byID["0x05"])
+		t.Fatalf("mileage parsed = %#v", location[envelope.FieldTotalMileageKM])
 	}
-	tireValues := byID["0x05"]["values"].([]map[string]any)
+	tirePressure, ok := location["tire_pressure"].(map[string]any)
+	if !ok {
+		t.Fatalf("tire pressure missing: %#v", location["tire_pressure"])
+	}
+	tireValues := tirePressure["values"].([]map[string]any)
 	if tireValues[0]["value"] != byte(0x37) || tireValues[0]["valid"] != true {
 		t.Fatalf("tire pressure first value = %#v", tireValues[0])
 	}
-	if byID["0x11"]["location_type"] != byte(0x42) || byID["0x11"]["area_id"] != uint32(0x42) {
+	overspeed := location["overspeed_alarm"].(map[string]any)
-		t.Fatalf("overspeed parsed = %#v", byID["0x11"])
+	if overspeed["location_type"] != byte(0x42) || overspeed["area_id"] != uint32(0x42) {
+		t.Fatalf("overspeed parsed = %#v", overspeed)
 	}
-	if byID["0x12"]["location_type"] != byte(0x4d) || byID["0x12"]["area_id"] != uint32(0x4d) || byID["0x12"]["direction"] != byte(0x4d) {
+	areaRoute := location["area_route_alarm"].(map[string]any)
-		t.Fatalf("area route parsed = %#v", byID["0x12"])
+	if areaRoute["location_type"] != byte(0x4d) || areaRoute["area_id"] != uint32(0x4d) || areaRoute["direction"] != byte(0x4d) {
+		t.Fatalf("area route parsed = %#v", areaRoute)
 	}
-	if byID["0x13"]["road_section_id"] != uint32(0x58) || byID["0x13"]["driving_time_seconds"] != uint16(0x58) {
+	roadSection := location["road_section_driving_time_alarm"].(map[string]any)
-		t.Fatalf("road section parsed = %#v", byID["0x13"])
+	if roadSection["road_section_id"] != uint32(0x58) || roadSection["driving_time_seconds"] != uint16(0x58) {
+		t.Fatalf("road section parsed = %#v", roadSection)
 	}
-	ioBits := byID["0x2A"]["bits"].(map[string]bool)
+	ioStatus := location["io_status"].(map[string]any)
+	ioBits := ioStatus["bits"].(map[string]bool)
 	if ioBits["deep_sleep"] || !ioBits["sleep"] {
 		t.Fatalf("io bits = %#v", ioBits)
 	}

go/vehicle-gateway/internal/realtime/repository.go

@@ -61,7 +61,7 @@ func (r *Repository) Update(ctx context.Context, env envelope.FrameEnvelope) err
 			protocolSnapshot.VIN = vin
 		}
 		mergeFields(&protocolSnapshot, env.Fields, eventMS)
-		protocolSnapshot.Parsed = mergeParsed(protocolSnapshot.Parsed, env.Parsed)
+		protocolSnapshot.Parsed = mergeParsedForProtocol(env.Protocol, protocolSnapshot.Parsed, env.Parsed)
 		if eventMS >= protocolSnapshot.EventTimeMS {
 			protocolSnapshot.EventTimeMS = eventMS
 			protocolSnapshot.EventID = env.StableEventID()
@@ -290,6 +290,27 @@ func mergeParsed(existing map[string]any, incoming map[string]any) map[string]an
 	return out
 }
 
+func mergeParsedForProtocol(protocol envelope.Protocol, existing map[string]any, incoming map[string]any) map[string]any {
+	out := mergeParsed(existing, incoming)
+	for _, key := range replaceParsedKeys(protocol, incoming) {
+		out[key] = cloneAny(incoming[key])
+	}
+	return out
+}
+
+func replaceParsedKeys(protocol envelope.Protocol, incoming map[string]any) []string {
+	keys := make([]string, 0, 2)
+	if _, ok := incoming["header"]; ok {
+		keys = append(keys, "header")
+	}
+	if protocol == envelope.ProtocolJT808 {
+		if _, ok := incoming["location"]; ok {
+			keys = append(keys, "location")
+		}
+	}
+	return keys
+}
+
 func mergeAny(existing any, incoming any) any {
 	switch incomingTyped := incoming.(type) {
 	case map[string]any:

go/vehicle-gateway/internal/realtime/repository_test.go

@@ -196,6 +196,72 @@ func TestRepositoryMergesNestedGB32960MotorSlicesBySerialNo(t *testing.T) {
 	}
 }
 
+func TestRepositoryReplacesJT808LocationWhenUpdatingRealtimeRaw(t *testing.T) {
+	repo, closeFn := newTestRepository(t)
+	defer closeFn()
+	ctx := context.Background()
+
+	if err := repo.Update(ctx, envelope.FrameEnvelope{
+		Protocol:     envelope.ProtocolJT808,
+		VIN:          "VIN001",
+		EventTimeMS:  1000,
+		ReceivedAtMS: 1100,
+		MessageID:    "0x0200",
+		Parsed: map[string]any{
+			"header": map[string]any{
+				"message_id":    "0x0200",
+				"phone_raw":     "013307795425",
+				"phone_bcd_hex": "013307795425",
+			},
+			"location": map[string]any{
+				"additional": []any{
+					map[string]any{"id": "0x01", "parsed": map[string]any{"raw_value_tenth_km": 102412}},
+				},
+				"total_mileage_km": 10241.2,
+			},
+		},
+		Fields: map[string]any{envelope.FieldTotalMileageKM: 10241.2},
+	}); err != nil {
+		t.Fatalf("Update() initial error = %v", err)
+	}
+	if err := repo.Update(ctx, envelope.FrameEnvelope{
+		Protocol:     envelope.ProtocolJT808,
+		VIN:          "VIN001",
+		EventTimeMS:  2000,
+		ReceivedAtMS: 2100,
+		MessageID:    "0x0200",
+		Parsed: map[string]any{
+			"header": map[string]any{
+				"message_id": "0x0200",
+				"phone":      "13307795425",
+			},
+			"location": map[string]any{
+				"total_mileage_km":        10241.3,
+				"network_signal_strength": byte(31),
+			},
+		},
+		Fields: map[string]any{envelope.FieldTotalMileageKM: 10241.3},
+	}); err != nil {
+		t.Fatalf("Update() replacement error = %v", err)
+	}
+
+	realtimeRaw, err := repo.GetRealtimeRaw(ctx, "VIN001", envelope.ProtocolJT808)
+	if err != nil {
+		t.Fatalf("GetRealtimeRaw() error = %v", err)
+	}
+	header := realtimeRaw["header"].(map[string]any)
+	if _, ok := header["phone_raw"]; ok {
+		t.Fatalf("header should be replaced, got %#v", header)
+	}
+	location := realtimeRaw["location"].(map[string]any)
+	if _, ok := location["additional"]; ok {
+		t.Fatalf("jt808 location should be replaced, got %#v", location)
+	}
+	if location["total_mileage_km"] != float64(10241.3) {
+		t.Fatalf("mileage = %#v", location["total_mileage_km"])
+	}
+}
+
 func TestRepositoryOnlineStatus(t *testing.T) {
 	repo, closeFn := newTestRepository(t)
 	defer closeFn()