180 lines
6.3 KiB
Go
180 lines
6.3 KiB
Go
package logic
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"fusenapi/constants"
|
|
"fusenapi/model/gmodel"
|
|
"fusenapi/utils/auth"
|
|
"fusenapi/utils/basic"
|
|
"fusenapi/utils/format"
|
|
"fusenapi/utils/shopping_cart"
|
|
"gorm.io/gorm"
|
|
"strings"
|
|
|
|
"fusenapi/server/shopping-cart/internal/svc"
|
|
"fusenapi/server/shopping-cart/internal/types"
|
|
|
|
"github.com/zeromicro/go-zero/core/logx"
|
|
)
|
|
|
|
type CalculateCartPriceLogic struct {
|
|
logx.Logger
|
|
ctx context.Context
|
|
svcCtx *svc.ServiceContext
|
|
}
|
|
|
|
func NewCalculateCartPriceLogic(ctx context.Context, svcCtx *svc.ServiceContext) *CalculateCartPriceLogic {
|
|
return &CalculateCartPriceLogic{
|
|
Logger: logx.WithContext(ctx),
|
|
ctx: ctx,
|
|
svcCtx: svcCtx,
|
|
}
|
|
}
|
|
|
|
// 处理进入前逻辑w,r
|
|
// func (l *CalculateCartPriceLogic) BeforeLogic(w http.ResponseWriter, r *http.Request) {
|
|
// }
|
|
|
|
func (l *CalculateCartPriceLogic) CalculateCartPrice(req *types.CalculateCartPriceReq, userinfo *auth.UserInfo) (resp *basic.Response) {
|
|
if !userinfo.IsUser() {
|
|
return resp.SetStatusWithMessage(basic.CodeUnAuth, "please sign in")
|
|
}
|
|
if len(req.CalculateList) == 0 {
|
|
return resp.SetStatusWithMessage(basic.CodeOK, "success", types.CalculateCartPriceRsp{CalculateResultList: []types.CalculateResultItem{}})
|
|
}
|
|
cartIds := make([]int64, 0, len(req.CalculateList))
|
|
mapCalculateQuantity := make(map[int64]types.CalculateItem)
|
|
for _, v := range req.CalculateList {
|
|
cartIds = append(cartIds, v.CartId)
|
|
if v.PurchaseQuantity <= 0 {
|
|
return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "purchase quantity must grater than 0")
|
|
}
|
|
mapCalculateQuantity[v.CartId] = v
|
|
}
|
|
//获取购物车列表
|
|
carts, _, err := l.svcCtx.AllModels.FsShoppingCart.GetAllCartsByParam(l.ctx, gmodel.GetAllCartsByParamReq{
|
|
Ids: cartIds,
|
|
Fields: "id,size_id,product_id,fitting_id",
|
|
UserId: userinfo.UserId,
|
|
Page: 1,
|
|
Limit: len(cartIds),
|
|
})
|
|
if err != nil {
|
|
logx.Error(err)
|
|
return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "failed to get cart list")
|
|
}
|
|
if len(carts) < len(req.CalculateList) {
|
|
return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "please refresh page for the shopping cart has changed!!")
|
|
}
|
|
sizeIds := make([]int64, 0, len(carts))
|
|
productIds := make([]int64, 0, len(carts))
|
|
fittingIds := make([]int64, 0, len(carts))
|
|
for _, v := range carts {
|
|
sizeIds = append(sizeIds, *v.SizeId)
|
|
productIds = append(productIds, *v.ProductId)
|
|
if *v.FittingId > 0 {
|
|
fittingIds = append(fittingIds, *v.FittingId)
|
|
}
|
|
}
|
|
//根据sizeid获取价格列表
|
|
priceList, err := l.svcCtx.AllModels.FsProductPrice.GetPriceListByProductIdsSizeIds(l.ctx, productIds, sizeIds)
|
|
if err != nil {
|
|
logx.Error(err)
|
|
return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "failed to get price list")
|
|
}
|
|
mapPrice := make(map[string]gmodel.FsProductPrice)
|
|
for _, v := range priceList {
|
|
mapPrice[fmt.Sprintf("%d_%d", *v.ProductId, *v.SizeId)] = v
|
|
}
|
|
//获取配件列表(只有id跟价格)
|
|
fittingList, err := l.svcCtx.AllModels.FsProductModel3d.GetAllByIdsTag(l.ctx, fittingIds, constants.TAG_PARTS, "id,price")
|
|
if err != nil {
|
|
logx.Error(err)
|
|
return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "failed to get fitting list")
|
|
}
|
|
mapFitting := make(map[int64]int64)
|
|
for _, v := range fittingList {
|
|
mapFitting[v.Id] = *v.Price
|
|
}
|
|
//开始计算价格
|
|
calculateResultList := make([]types.CalculateResultItem, 0, len(req.CalculateList))
|
|
subTotalPrice := int64(0)
|
|
//开启事物
|
|
err = l.svcCtx.MysqlConn.Transaction(func(tx *gorm.DB) error {
|
|
shoppingCartModel := gmodel.NewFsShoppingCartModel(tx)
|
|
for _, cart := range carts {
|
|
sizePrice, ok := mapPrice[fmt.Sprintf("%d_%d", *cart.ProductId, *cart.SizeId)]
|
|
if !ok {
|
|
return errors.New(fmt.Sprintf("there carts contain some one which have no price info:%d_%d", *cart.ProductId, *cart.SizeId))
|
|
}
|
|
//阶梯数量切片
|
|
stepNum, err := format.StrSlicToIntSlice(strings.Split(*sizePrice.StepNum, ","))
|
|
if err != nil {
|
|
logx.Error(err)
|
|
return errors.New(fmt.Sprintf("failed to parse step number:%d_%d", *cart.ProductId, *cart.SizeId))
|
|
}
|
|
lenStepNum := len(stepNum)
|
|
//阶梯价格切片
|
|
stepPrice, err := format.StrSlicToIntSlice(strings.Split(*sizePrice.StepPrice, ","))
|
|
if err != nil {
|
|
logx.Error(err)
|
|
return errors.New(fmt.Sprintf("failed to parse step price:%d_%d", *cart.ProductId, *cart.SizeId))
|
|
}
|
|
lenStepPrice := len(stepPrice)
|
|
if lenStepPrice == 0 || lenStepNum == 0 {
|
|
return errors.New(fmt.Sprintf("step price or step number is not set:%d_%d", *cart.ProductId, *cart.SizeId))
|
|
}
|
|
//请求的数量
|
|
reqPurchaseQuantity := mapCalculateQuantity[cart.Id].PurchaseQuantity
|
|
isSelected := int64(0)
|
|
if mapCalculateQuantity[cart.Id].IsSelected {
|
|
isSelected = 1
|
|
}
|
|
//如果有配件,单价也要加入配件价格
|
|
fittingPrice := int64(0)
|
|
if *cart.FittingId > 0 {
|
|
if fPrice, ok := mapFitting[*cart.FittingId]; ok {
|
|
fittingPrice = fPrice
|
|
} else {
|
|
return errors.New(fmt.Sprintf("cart contain some one witch lose fitting:%d", *cart.FittingId))
|
|
}
|
|
}
|
|
//计算价格
|
|
itemPrice, totalPrice := shopping_cart.CaculateCartPrice(reqPurchaseQuantity, stepPrice, stepNum, fittingPrice, *sizePrice.EachBoxNum)
|
|
calculateResultList = append(calculateResultList, types.CalculateResultItem{
|
|
CartId: cart.Id,
|
|
ItemPrice: fmt.Sprintf("%.3f", format.CentitoDollar(itemPrice)),
|
|
TotalPrice: fmt.Sprintf("%.3f", format.CentitoDollar(totalPrice)),
|
|
})
|
|
updData := &gmodel.FsShoppingCart{
|
|
PurchaseQuantity: &reqPurchaseQuantity,
|
|
}
|
|
//如果是选中则累加总价
|
|
if isSelected == 1 {
|
|
subTotalPrice += totalPrice
|
|
updData.IsSelected = &isSelected
|
|
}
|
|
//更新购物车购买数量
|
|
if err = shoppingCartModel.Update(l.ctx, cart.Id, userinfo.UserId, updData); err != nil {
|
|
logx.Error(err)
|
|
return errors.New(fmt.Sprintf("failed to update cart`s purchase quantity:%d", cart.Id))
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
return resp.SetStatusWithMessage(basic.CodeDbSqlErr, err.Error())
|
|
}
|
|
return resp.SetStatusWithMessage(basic.CodeOK, "success", types.CalculateCartPriceRsp{
|
|
SubTotalPrice: fmt.Sprintf("%.3f", format.CentitoDollar(subTotalPrice)),
|
|
CalculateResultList: calculateResultList,
|
|
})
|
|
}
|
|
|
|
// 处理逻辑后 w,r 如:重定向, resp 必须重新处理
|
|
// func (l *CalculateCartPriceLogic) AfterLogic(w http.ResponseWriter, r *http.Request, resp *basic.Response) {
|
|
// // httpx.OkJsonCtx(r.Context(), w, resp)
|
|
// }
|