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

package logic

import (
	"errors"
	"fusenapi/model/gmodel"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"gorm.io/gorm"

	"context"

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

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

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

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

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

func (l *ModifyCartPurchaseQuantityLogic) ModifyCartPurchaseQuantity(req *types.ModifyCartPurchaseQuantityReq, userinfo *auth.UserInfo) (resp *basic.Response) {
	if !userinfo.IsUser() {
		return resp.SetStatusWithMessage(basic.CodeUnAuth, "please sign in")
	}
	if req.Id <= 0 {
		return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "cart id is required")
	}
	if req.PurchaseQuantity <= 0 {
		return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "purchase quantity can not less than 0 or equal to 0")
	}
	//查询购物车
	_, err := l.svcCtx.AllModels.FsShoppingCart.FineOneUserCart(l.ctx, req.Id, userinfo.UserId, "id")
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return resp.SetStatusWithMessage(basic.CodeDbRecordNotFoundErr, "the shopping cart is not exists")
		}
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "system err:failed to get  shopping cart info ")
	}
	//修改数量
	err = l.svcCtx.AllModels.FsShoppingCart.Update(l.ctx, req.Id, userinfo.UserId, &gmodel.FsShoppingCart{
		PurchaseQuantity: &req.PurchaseQuantity,
	})
	if err != nil {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "system err:failed to modify cart purchase quantity")
	}
	return resp.SetStatus(basic.CodeOK, "success")
}

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