不允许购买第二个主套餐

internal/service/package/addon_main_package.go

@@ -39,3 +39,47 @@ func FindAttachableMainPackageForAddon(tx *gorm.DB, carrierType string, carrierI
 	}
 	return &mainPackage, nil
 }
+
+// FindBlockingMainPackageForFormal 查询阻止购买新主套餐的现有主套餐。
+// 待生效、生效中、未过期的已用完主套餐都仍占用主套餐资格；只有过期或失效后才允许再次购买主套餐。
+func FindBlockingMainPackageForFormal(tx *gorm.DB, carrierType string, carrierID uint, now time.Time) (*model.PackageUsage, error) {
+	var mainPackage model.PackageUsage
+	query := tx.Model(&model.PackageUsage{}).
+		Where("master_usage_id IS NULL").
+		Where(
+			"(status IN ? OR (status = ? AND (expires_at IS NULL OR expires_at > ?)))",
+			[]int{
+				constants.PackageUsageStatusPending,
+				constants.PackageUsageStatusActive,
+			},
+			constants.PackageUsageStatusDepleted,
+			now,
+		).
+		Order("priority ASC, created_at ASC")
+
+	switch carrierType {
+	case constants.AssetWalletResourceTypeIotCard, "card":
+		query = query.Where("iot_card_id = ?", carrierID)
+	case constants.AssetWalletResourceTypeDevice:
+		query = query.Where("device_id = ?", carrierID)
+	default:
+		return nil, gorm.ErrRecordNotFound
+	}
+
+	if err := query.First(&mainPackage).Error; err != nil {
+		return nil, err
+	}
+	return &mainPackage, nil
+}
+
+// HasBlockingMainPackageForFormal 判断载体是否已有阻止新主套餐购买的主套餐。
+func HasBlockingMainPackageForFormal(tx *gorm.DB, carrierType string, carrierID uint, now time.Time) (bool, error) {
+	_, err := FindBlockingMainPackageForFormal(tx, carrierType, carrierID, now)
+	if err == nil {
+		return true, nil
+	}
+	if err == gorm.ErrRecordNotFound {
+		return false, nil
+	}
+	return false, err
+}