七月迭代短暂完结,还有很多后端的关键东西没有弄,这是一版赶时间做的东西

internal/service/customer_binding/service.go

@@ -4,12 +4,14 @@ package customer_binding
 
 import (
 	"context"
+	"sort"
 	"time"
 
 	"gorm.io/gorm"
 
 	"github.com/break/junhong_cmp_fiber/internal/model"
 	"github.com/break/junhong_cmp_fiber/internal/store/postgres"
+	"github.com/break/junhong_cmp_fiber/pkg/constants"
 	"github.com/break/junhong_cmp_fiber/pkg/errors"
 )
 
@@ -144,6 +146,72 @@ func (s *Service) OwnsAsset(ctx context.Context, customerID uint, assetType stri
 	return false, errors.New(errors.CodeInvalidParam)
 }
 
+// ActiveCustomerIDsByAsset 返回当前启用且关联指定资产的个人客户 ID，结果去重并稳定排序。
+func (s *Service) ActiveCustomerIDsByAsset(ctx context.Context, tx *gorm.DB, assetType string, assetID uint) ([]uint, error) {
+	if tx == nil {
+		tx = s.db
+	}
+	customerIDs := make(map[uint]struct{})
+	switch normalizeAssetType(assetType) {
+	case assetTypeIotCard:
+		card, err := s.readCard(ctx, tx, assetID)
+		if err != nil {
+			return nil, err
+		}
+		if card.VirtualNo != "" {
+			records, err := s.makePCD(tx).GetByDeviceNo(ctx, card.VirtualNo)
+			if err != nil {
+				return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询卡关联客户失败")
+			}
+			collectActiveDeviceCustomerIDs(customerIDs, records)
+		} else {
+			records, err := s.makePCI(tx).GetByICCID(ctx, card.ICCID)
+			if err != nil {
+				return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询卡关联客户失败")
+			}
+			collectActiveCardCustomerIDs(customerIDs, records)
+		}
+	case assetTypeDevice:
+		device, err := s.readDevice(ctx, tx, assetID)
+		if err != nil {
+			return nil, err
+		}
+		identifier := device.VirtualNo
+		if identifier == "" {
+			identifier = device.IMEI
+		}
+		records, err := s.makePCD(tx).GetByDeviceNo(ctx, identifier)
+		if err != nil {
+			return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询设备关联客户失败")
+		}
+		collectActiveDeviceCustomerIDs(customerIDs, records)
+	default:
+		return nil, errors.New(errors.CodeInvalidParam, "无效的资产类型")
+	}
+	result := make([]uint, 0, len(customerIDs))
+	for customerID := range customerIDs {
+		result = append(result, customerID)
+	}
+	sort.Slice(result, func(i, j int) bool { return result[i] < result[j] })
+	return result, nil
+}
+
+func collectActiveDeviceCustomerIDs(target map[uint]struct{}, records []*model.PersonalCustomerDevice) {
+	for _, record := range records {
+		if record != nil && record.Status == constants.StatusEnabled && record.CustomerID > 0 {
+			target[record.CustomerID] = struct{}{}
+		}
+	}
+}
+
+func collectActiveCardCustomerIDs(target map[uint]struct{}, records []*model.PersonalCustomerICCID) {
+	for _, record := range records {
+		if record != nil && record.Status == constants.StatusEnabled && record.CustomerID > 0 {
+			target[record.CustomerID] = struct{}{}
+		}
+	}
+}
+
 // Bind 在事务中创建客户与资产的绑定关系
 // 有虚拟号的 IoT 卡 / 设备 → tb_personal_customer_device
 // 无虚拟号的 IoT 卡 → tb_personal_customer_iccid（Issue 02）