gobackend-qingma/service/cart_service.go

package service

import (
	"database/sql"
	"errors"
	"xiaoniaokuaiyan.com/xiaoniao/entity"

	"xiaoniaokuaiyan.com/xiaoniao/dal"
	"xiaoniaokuaiyan.com/xiaoniao/util"
)

type CartService struct {
	dal.ICart
}

func (srv *CartService) CartList(customId int) (interface{}, error) {
	return srv.ICart.Get(customId)
}

func (srv *CartService) CartAdd(customId int, productId int, quantity int, isAdd bool) (interface{}, error) {
	plist, err := dal.DefaultProductDal.Get([]int{productId})
	if err != nil {
		return nil, err
	}
	if len(plist) == 0 {
		return nil, errors.New("1::wrong product id")
	}
	db := util.GetSqlDB()
	var cartNum int
	var strSql string
	if isAdd {
		strSql = "select quantity from t_cart where cid = ? and pid =?;"
		err = db.Get(&cartNum, strSql, customId, productId)
		if err != nil && err != sql.ErrNoRows {
			return nil, err
		}
	}
	if plist[0].StockSwitch == "ON" && plist[0].Stock < quantity+cartNum {
		return nil, errors.New("3::out of stock")
	}
	strSql = "SELECT sum(t2.quantity) as bought_num from t_order t1 left join t_order_product t2 on t1.id = t2.order_id left join t_product t3 on t2.product_id = t3.id where custom_id = ? and t3.id =? and t1.status not in(7,4,9) and t1.retype in ('100','110');"
	var bnum int
	db.Get(&bnum, strSql, customId, productId)
	if plist[0].PstockSwitch == "ON" && bnum+quantity+cartNum > plist[0].Pstock {
		return nil, errors.New("4::upper limit")
	}
	data, err := srv.ICart.Update(customId, productId, quantity, isAdd)
	if err != nil {
		return nil, errors.New("2::购物车已存在该产品")
	}
	return data, nil
}

func (srv *CartService) CartRemove(customId int, productIds []int) (interface{}, error) {
	return srv.ICart.Del(customId, productIds)
}

func (srv *CartService) CartClear(customId int) (interface{}, error) {
	return srv.ICart.Clear(customId)
}

func (srv *CartService) ZFB_CartList(customId int) (interface{}, error) {
	db := util.GetSqlDB()
	strSql := "select t1.quantity, t2.* from t_cart t1 left join t_product t2 on t1.pid = t2.id where cid = ? and t2.is_zfb=1"
	plist := []*entity.ProductDB{}
	err := db.Select(&plist, strSql, customId)
	if err != nil {
		return nil, err
	}
	entity.ZFBWash(plist)
	return plist, err
}