fix: throttle jt808 registration touches

go/vehicle-gateway/internal/identity/resolver.go

@@ -6,6 +6,8 @@ import (
 	"errors"
 	"fmt"
 	"strings"
+	"sync"
+	"time"
 
 	"lingniu-vehicle-ingest/go/vehicle-gateway/internal/envelope"
 )
@@ -21,11 +23,22 @@ func (NoopResolver) Resolve(_ context.Context, env envelope.FrameEnvelope) (enve
 }
 
 type MySQLResolver struct {
-	db    *sql.DB
-	table string
+	db                    *sql.DB
+	table                 string
+	locationTouchInterval time.Duration
+	touchMu               sync.Mutex
+	locationTouches       map[string]time.Time
+}
+
+type MySQLResolverOptions struct {
+	LocationTouchInterval time.Duration
 }
 
 func NewMySQLResolver(db *sql.DB, table string) *MySQLResolver {
+	return NewMySQLResolverWithOptions(db, table, MySQLResolverOptions{})
+}
+
+func NewMySQLResolverWithOptions(db *sql.DB, table string, opts MySQLResolverOptions) *MySQLResolver {
 	if db == nil {
 		panic("identity db must not be nil")
 	}
@@ -33,7 +46,16 @@ func NewMySQLResolver(db *sql.DB, table string) *MySQLResolver {
 	if table == "" || !safeIdentifier(table) {
 		table = "vehicle_identity_binding"
 	}
-	return &MySQLResolver{db: db, table: table}
+	interval := opts.LocationTouchInterval
+	if interval <= 0 {
+		interval = 10 * time.Minute
+	}
+	return &MySQLResolver{
+		db:                    db,
+		table:                 table,
+		locationTouchInterval: interval,
+		locationTouches:       map[string]time.Time{},
+	}
 }
 
 func safeIdentifier(value string) bool {
@@ -50,6 +72,7 @@ func safeIdentifier(value string) bool {
 }
 
 func (r *MySQLResolver) Resolve(ctx context.Context, env envelope.FrameEnvelope) (envelope.FrameEnvelope, error) {
+	env.Phone = normalizePhone(env.Phone)
 	if strings.TrimSpace(env.VIN) != "" {
 		if err := r.trackJT808(ctx, env); err != nil {
 			return env, err
@@ -99,6 +122,9 @@ func (r *MySQLResolver) trackJT808(ctx context.Context, env envelope.FrameEnvelo
 	if env.Protocol != envelope.ProtocolJT808 || strings.TrimSpace(env.Phone) == "" || strings.TrimSpace(env.MessageID) == "" {
 		return nil
 	}
+	if env.MessageID != "0x0100" && env.MessageID != "0x0102" && !r.shouldTouchJT808Location(env) {
+		return nil
+	}
 	registration := mapValue(env.Parsed, "registration")
 	authentication := mapValue(env.Parsed, "authentication")
 	deviceID := firstNonEmpty(env.DeviceID, textValue(registration, "device_id"))
@@ -170,6 +196,25 @@ WHERE vin = ?`, env.Phone, env.Phone, deviceID, deviceID, plate, plate, vin)
 	return err
 }
 
+func (r *MySQLResolver) shouldTouchJT808Location(env envelope.FrameEnvelope) bool {
+	if env.MessageID != "0x0200" {
+		return false
+	}
+	phone := normalizePhone(env.Phone)
+	if phone == "" {
+		return false
+	}
+	now := time.Now()
+	r.touchMu.Lock()
+	defer r.touchMu.Unlock()
+	last, ok := r.locationTouches[phone]
+	if ok && now.Sub(last) < r.locationTouchInterval {
+		return false
+	}
+	r.locationTouches[phone] = now
+	return true
+}
+
 type CandidateKey struct {
 	Column string
 	Value  string
@@ -189,16 +234,21 @@ func CandidateKeys(env envelope.FrameEnvelope) []CandidateKey {
 		}
 		out = append(out, CandidateKey{Column: column, Value: value})
 	}
-	add("phone", env.Phone)
-	if trimmed := strings.TrimLeft(strings.TrimSpace(env.Phone), "0"); trimmed != "" {
-		add("phone", trimmed)
-	}
+	add("phone", normalizePhone(env.Phone))
 	add("device_id", env.DeviceID)
 	add("plate", env.Plate)
 	add("vin", env.VehicleKeyHint)
 	return out
 }
 
+func normalizePhone(phone string) string {
+	trimmed := strings.TrimLeft(strings.TrimSpace(phone), "0")
+	if trimmed == "" {
+		return strings.TrimSpace(phone)
+	}
+	return trimmed
+}
+
 func mapValue(values map[string]any, key string) map[string]any {
 	if values == nil {
 		return nil