feat: add superadmin wallet view

backend/app/services/super.go

@@ -294,6 +294,94 @@ func (s *super) GetUser(ctx context.Context, id int64) (*super_dto.UserItem, err
 	}, nil
 }
 
+func (s *super) GetUserWallet(ctx context.Context, userID int64) (*super_dto.SuperWalletResponse, error) {
+	if userID == 0 {
+		return nil, errorx.ErrBadRequest.WithMsg("用户ID不能为空")
+	}
+
+	// 查询用户余额。
+	userTbl, userQuery := models.UserQuery.QueryContext(ctx)
+	u, err := userQuery.Where(userTbl.ID.Eq(userID)).First()
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, errorx.ErrRecordNotFound
+		}
+		return nil, errorx.ErrDatabaseError.WithCause(err)
+	}
+
+	// 仅返回最近交易记录，避免超管页面加载过重。
+	orderTbl, orderQuery := models.OrderQuery.QueryContext(ctx)
+	orders, err := orderQuery.
+		Where(orderTbl.UserID.Eq(userID), orderTbl.Status.Eq(consts.OrderStatusPaid)).
+		Order(orderTbl.CreatedAt.Desc()).
+		Limit(20).
+		Find()
+	if err != nil {
+		return nil, errorx.ErrDatabaseError.WithCause(err)
+	}
+
+	// 补齐订单对应的租户信息。
+	tenantIDMap := make(map[int64]struct{})
+	for _, o := range orders {
+		if o.TenantID > 0 {
+			tenantIDMap[o.TenantID] = struct{}{}
+		}
+	}
+	tenantIDs := make([]int64, 0, len(tenantIDMap))
+	for id := range tenantIDMap {
+		tenantIDs = append(tenantIDs, id)
+	}
+	tenantMap := make(map[int64]*models.Tenant)
+	if len(tenantIDs) > 0 {
+		tenantTbl, tenantQuery := models.TenantQuery.QueryContext(ctx)
+		tenants, err := tenantQuery.Where(tenantTbl.ID.In(tenantIDs...)).Find()
+		if err != nil {
+			return nil, errorx.ErrDatabaseError.WithCause(err)
+		}
+		for _, tenant := range tenants {
+			tenantMap[tenant.ID] = tenant
+		}
+	}
+
+	txs := make([]super_dto.SuperWalletTransaction, 0, len(orders))
+	for _, o := range orders {
+		txType := "expense"
+		switch o.Type {
+		case consts.OrderTypeRecharge:
+			txType = "income"
+		case consts.OrderTypeWithdrawal:
+			txType = "expense"
+		case consts.OrderTypeContentPurchase:
+			txType = "expense"
+		}
+
+		tenant := tenantMap[o.TenantID]
+		tenantCode := ""
+		tenantName := ""
+		if tenant != nil {
+			tenantCode = tenant.Code
+			tenantName = tenant.Name
+		}
+		txs = append(txs, super_dto.SuperWalletTransaction{
+			ID:         o.ID,
+			OrderType:  o.Type,
+			Title:      o.Type.Description(),
+			Amount:     o.AmountPaid,
+			Type:       txType,
+			Date:       o.CreatedAt.Format(time.RFC3339),
+			TenantID:   o.TenantID,
+			TenantCode: tenantCode,
+			TenantName: tenantName,
+		})
+	}
+
+	return &super_dto.SuperWalletResponse{
+		Balance:       u.Balance,
+		BalanceFrozen: u.BalanceFrozen,
+		Transactions:  txs,
+	}, nil
+}
+
 func (s *super) UpdateUserStatus(ctx context.Context, id int64, form *super_dto.UserStatusUpdateForm) error {
 	tbl, q := models.UserQuery.QueryContext(ctx)
 	_, err := q.Where(tbl.ID.Eq(id)).Update(tbl.Status, consts.UserStatus(form.Status))