feat(go): add realtime kv projection

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

@@ -0,0 +1,78 @@
+package realtime
+
+import (
+	"testing"
+
+	"lingniu-vehicle-ingest/go/vehicle-gateway/internal/envelope"
+)
+
+func TestRealtimeKVFieldsFromGB32960ParsedDomains(t *testing.T) {
+	rows := realtimeKVFields(envelope.FrameEnvelope{
+		Protocol:     envelope.ProtocolGB32960,
+		VIN:          "VIN001",
+		EventTimeMS:  1000,
+		ReceivedAtMS: 1100,
+		EventID:      "event-1",
+	}, map[string]any{
+		"data_units": []any{
+			map[string]any{"type": "0x01", "name": "vehicle", "value": map[string]any{"soc_percent": 88.0}},
+			map[string]any{"type": "0x30", "name": "gd_fc_stack", "value": map[string]any{
+				"stack_count": 1,
+				"summaries": []any{
+					map[string]any{"stack_water_outlet_temp_c": 63, "hydrogen_inlet_pressure_kpa": 130},
+				},
+			}},
+		},
+	})
+
+	values := kvMap(rows)
+	if values["vehicle/soc_percent"] != "88" {
+		t.Fatalf("vehicle soc kv missing: %#v", values)
+	}
+	if values["gd_fc_stack/stack_water_outlet_temp_c"] != "63" {
+		t.Fatalf("stack temp kv missing: %#v", values)
+	}
+	if values["gd_fc_stack/hydrogen_inlet_pressure_kpa"] != "130" {
+		t.Fatalf("stack pressure kv missing: %#v", values)
+	}
+	if values["gd_fc_stack/summaries.0.stack_water_outlet_temp_c"] != "" {
+		t.Fatalf("stack single summary should be flattened onto domain, got %#v", values)
+	}
+}
+
+func TestRealtimeKVFieldsFromJT808LocationAndMQTTFields(t *testing.T) {
+	jtRows := realtimeKVFields(envelope.FrameEnvelope{
+		Protocol: envelope.ProtocolJT808,
+		VIN:      "VIN001",
+		Fields: map[string]any{
+			envelope.FieldLongitude:      121.1,
+			envelope.FieldLatitude:       30.2,
+			envelope.FieldTotalMileageKM: 10241.2,
+		},
+	}, map[string]any{})
+	jtValues := kvMap(jtRows)
+	if jtValues["location/total_mileage_km"] != "10241.2" || jtValues["location/longitude"] != "121.1" {
+		t.Fatalf("jt808 location kv missing: %#v", jtValues)
+	}
+
+	mqttRows := realtimeKVFields(envelope.FrameEnvelope{
+		Protocol: envelope.ProtocolYutongMQTT,
+		VIN:      "VIN002",
+		Fields: map[string]any{
+			envelope.FieldSOCPercent: 76,
+			"gear":                   3,
+		},
+	}, map[string]any{})
+	mqttValues := kvMap(mqttRows)
+	if mqttValues["vehicle/soc_percent"] != "76" || mqttValues["vehicle/gear"] != "3" {
+		t.Fatalf("mqtt vehicle kv missing: %#v", mqttValues)
+	}
+}
+
+func kvMap(rows []RealtimeKVField) map[string]string {
+	out := map[string]string{}
+	for _, row := range rows {
+		out[row.Domain+"/"+row.Field] = row.Value
+	}
+	return out
+}