fusenapi/server/shopping-cart/internal/logic/getcartnumlogic.go

package logic

import (
	"fusenapi/constants"
	"fusenapi/model/gmodel"
	"fusenapi/service/repositories"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"

	"context"

	"fusenapi/server/shopping-cart/internal/svc"
	"fusenapi/server/shopping-cart/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type GetCartNumLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewGetCartNumLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetCartNumLogic {
	return &GetCartNumLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// 处理进入前逻辑w,r
// func (l *GetCartNumLogic) BeforeLogic(w http.ResponseWriter, r *http.Request) {
// }

func (l *GetCartNumLogic) GetCartNum(req *types.Request, userinfo *auth.UserInfo) (resp *basic.Response) {
	if !userinfo.IsUser() {
		return resp.SetStatusWithMessage(basic.CodeUnAuth, "please sign in")
	}
	currentPage := constants.DEFAULT_PAGE
	limit := 1000
	//获取用户购物车列表
	carts, total, err := l.svcCtx.AllModels.FsShoppingCart.GetAllCartsByParam(l.ctx, gmodel.GetAllCartsByParamReq{
		UserId: userinfo.UserId,
		Sort:   "id DESC",
		Page:   currentPage,
		Limit:  limit,
	})
	if err != nil {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "system err:failed to get your shopping carts")
	}
	var (
		mapSize             = make(map[int64]gmodel.FsProductSize)
		mapModel            = make(map[int64]gmodel.FsProductModel3d)
		mapTemplate         = make(map[int64]gmodel.FsProductTemplateV2)
		mapProduct          = make(map[int64]gmodel.FsProduct)
		mapResourceMetadata = make(map[string]interface{})
	)
	//获取相关信息
	err = NewGetCartsLogic(l.ctx, l.svcCtx).GetRelationInfo(GetRelationInfoReq{
		Carts:               carts,
		MapSize:             mapSize,
		MapModel:            mapModel,
		MapTemplate:         mapTemplate,
		MapProduct:          mapProduct,
		MapResourceMetadata: mapResourceMetadata,
	})
	if err != nil {
		return resp.SetStatusWithMessage(basic.CodeServiceErr, err.Error())
	}
	//定义map收集变更信息
	mapCartChange := make(map[int64]string)
	mapSnapshot := make(map[int64]gmodel.CartSnapshot)
	//校验购物车数据是否变更
	err = l.svcCtx.Repositories.NewShoppingCart.VerifyShoppingCartSnapshotDataChange(repositories.VerifyShoppingCartSnapshotDataChangeReq{
		Carts:         carts,
		MapSize:       mapSize,
		MapModel:      mapModel,
		MapTemplate:   mapTemplate,
		MapCartChange: mapCartChange,
		MapSnapshot:   mapSnapshot,
		MapProduct:    mapProduct,
	})
	if err != nil {
		logx.Error("VerifyShoppingCartSnapshotDataChange err:", err.Error())
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "system err:failed to check shopping cart change data")
	}
	return resp.SetStatusWithMessage(basic.CodeOK, "success", types.GetCartNumRsp{
		TotalCount: total - int64(len(mapCartChange)), //总数 - 失效的
	})
}

// 处理逻辑后 w,r 如:重定向, resp 必须重新处理
// func (l *GetCartNumLogic) AfterLogic(w http.ResponseWriter, r *http.Request, resp *basic.Response) {
// // httpx.OkJsonCtx(r.Context(), w, resp)
// }