refactor(auth): extract timestamp validation to separate function

Move timestamp validation logic from handlers to ValidateTimeStamp function in auth.go to avoid code duplication and improve maintainability

auth.go

@@ -19,9 +19,9 @@ type TokenInfo struct {
 }
 
 var (
-	tokenMap  = make(map[int]*TokenInfo)
-	tokenMux  sync.RWMutex
-	tokenTTL  = time.Hour
+	tokenMap = make(map[int]*TokenInfo)
+	tokenMux sync.RWMutex
+	tokenTTL = time.Hour
 )
 
 func GenerateToken(userID int) (string, error) {
@@ -168,3 +168,11 @@ func isValidPassword(password string) bool {
 
 	return hasUpper && hasLower && hasDigit && hasSpecial
 }
+
+func ValidateTimeStamp(timeStamp int64) error {
+	currentTime := time.Now().UnixMilli()
+	if !globalConfig.Debug && (currentTime-timeStamp > 3000 || timeStamp-currentTime > 3000) {
+		return errors.New("timestamp out of valid range")
+	}
+	return nil
+}