[账单]显示账单、手动生成账单

internal/db/models/user_bill_dao.go

@@ -0,0 +1,206 @@
+package models
+
+import (
+	"encoding/json"
+	"github.com/TeaOSLab/EdgeAPI/internal/utils/numberutils"
+	_ "github.com/go-sql-driver/mysql"
+	"github.com/iwind/TeaGo/Tea"
+	"github.com/iwind/TeaGo/dbs"
+)
+
+type BillType = string
+
+const (
+	BillTypeTraffic BillType = "traffic" // 按流量计费
+)
+
+type UserBillDAO dbs.DAO
+
+func NewUserBillDAO() *UserBillDAO {
+	return dbs.NewDAO(&UserBillDAO{
+		DAOObject: dbs.DAOObject{
+			DB:     Tea.Env,
+			Table:  "edgeUserBills",
+			Model:  new(UserBill),
+			PkName: "id",
+		},
+	}).(*UserBillDAO)
+}
+
+var SharedUserBillDAO *UserBillDAO
+
+func init() {
+	dbs.OnReady(func() {
+		SharedUserBillDAO = NewUserBillDAO()
+	})
+}
+
+// 计算账单数量
+func (this *UserBillDAO) CountAllUserBills(isPaid int32, userId int64, month string) (int64, error) {
+	query := this.Query()
+	if isPaid == 0 {
+		query.Attr("isPaid", 0)
+	} else if isPaid > 0 {
+		query.Attr("isPaid", 1)
+	}
+	if userId > 0 {
+		query.Attr("userId", userId)
+	}
+	if len(month) > 0 {
+		query.Attr("month", month)
+	}
+	return query.Count()
+}
+
+// 列出单页账单
+func (this *UserBillDAO) ListUserBills(isPaid int32, userId int64, month string, offset, size int64) (result []*UserBill, err error) {
+	query := this.Query()
+	if isPaid == 0 {
+		query.Attr("isPaid", 0)
+	} else if isPaid > 0 {
+		query.Attr("isPaid", 1)
+	}
+	if userId > 0 {
+		query.Attr("userId", userId)
+	}
+	if len(month) > 0 {
+		query.Attr("month", month)
+	}
+	_, err = query.
+		Offset(offset).
+		Limit(size).
+		Slice(&result).
+		DescPk().
+		FindAll()
+	return
+}
+
+// 创建账单
+func (this *UserBillDAO) CreateBill(userId int64, billType BillType, description string, amount float32, month string) (int64, error) {
+	op := NewUserBillOperator()
+	op.UserId = userId
+	op.Type = billType
+	op.Description = description
+	op.Amount = amount
+	op.Month = month
+	op.IsPaid = false
+	return this.SaveInt64(op)
+}
+
+// 检查是否有当月账单
+func (this *UserBillDAO) ExistBill(userId int64, billType BillType, month string) (bool, error) {
+	return this.Query().
+		Attr("userId", userId).
+		Attr("month", month).
+		Attr("type", billType).
+		Exist()
+}
+
+// 生成账单
+// month 格式YYYYMM
+func (this *UserBillDAO) GenerateBills(month string) error {
+	// 用户
+	offset := int64(0)
+	size := int64(100) // 每次只查询N次，防止由于执行时间过长而锁表
+	for {
+		userIds, err := SharedUserDAO.ListEnabledUserIds(offset, size)
+		if err != nil {
+			return err
+		}
+		offset += size
+		if len(userIds) == 0 {
+			break
+		}
+
+		for _, userId := range userIds {
+			// CDN流量账单
+			err := this.generateTrafficBill(userId, month)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// 生成CDN流量账单
+// month 格式YYYYMM
+func (this *UserBillDAO) generateTrafficBill(userId int64, month string) error {
+	// 检查是否已经有账单了
+	b, err := this.ExistBill(userId, BillTypeTraffic, month)
+	if err != nil {
+		return err
+	}
+	if b {
+		return nil
+	}
+
+	// TODO 优化使用缓存
+	regions, err := SharedNodeRegionDAO.FindAllEnabledRegionPrices()
+	if err != nil {
+		return err
+	}
+	if len(regions) == 0 {
+		return nil
+	}
+
+	priceItems, err := SharedNodePriceItemDAO.FindAllEnabledRegionPrices(NodePriceTypeTraffic)
+	if err != nil {
+		return err
+	}
+	if len(priceItems) == 0 {
+		return nil
+	}
+
+	cost := float32(0)
+	for _, region := range regions {
+		if len(region.Prices) == 0 || region.Prices == "null" {
+			continue
+		}
+		priceMap := map[string]float32{}
+		err = json.Unmarshal([]byte(region.Prices), &priceMap)
+		if err != nil {
+			return err
+		}
+
+		trafficBytes, err := SharedServerDailyStatDAO.SumUserMonthly(userId, int64(region.Id), month)
+		if err != nil {
+			return err
+		}
+		if trafficBytes == 0 {
+			continue
+		}
+
+		itemId := SharedNodePriceItemDAO.SearchItemsWithBytes(priceItems, trafficBytes)
+		if itemId == 0 {
+			continue
+		}
+
+		price, ok := priceMap[numberutils.FormatInt64(itemId)]
+		if !ok {
+			continue
+		}
+
+		// 计算钱
+		// 这里采用1000进制
+		cost += (float32(trafficBytes*8) / 1_000_000_000) * price
+	}
+
+	if cost == 0 {
+		return nil
+	}
+
+	// 创建账单
+	_, err = this.CreateBill(userId, BillTypeTraffic, "按流量计费", cost, month)
+	return err
+}
+
+// 获取账单类型名称
+func (this *UserBillDAO) BillTypeName(billType BillType) string {
+	switch billType {
+	case BillTypeTraffic:
+		return "流量"
+	}
+	return ""
+}