// 应用优惠券
func (this *Order) ApplyCoupon(coupon promotion.ICouponPromotion) error {
if this._coupons == nil {
this._coupons = []promotion.ICouponPromotion{}
}
this._coupons = append(this._coupons, coupon)
v := this._value
//v.CouponCode = val.Code
//v.CouponDescribe = coupon.GetDescribe()
v.CouponFee = coupon.GetCouponFee(v.Fee)
v.PayFee = this.GetPaymentFee()
v.DiscountFee = v.DiscountFee + v.CouponFee
return nil
}
func (this *OrderCoupon) Clone(coupon promotion.ICouponPromotion,
orderId int, orderFee float32) *OrderCoupon {
v := coupon.GetDetailsValue()
this.CouponCode = v.Code
this.CouponId = v.Id
this.OrderId = orderId
this.Fee = coupon.GetCouponFee(orderFee)
this.Describe = coupon.GetDescribe()
this.SendIntegral = v.Integral
return this
}
// 生成订单
func (this *Shopping) BuildOrder(memberId int, couponCode string) (shopping.IOrder, shopping.ICart, error) {
order, m, cart, err := this.ParseShoppingCart(memberId)
if err != nil {
return order, cart, err
}
if len(couponCode) != 0 {
var coupon promotion.ICouponPromotion
var result bool
var val = order.GetValue()
cp := this._promRep.GetCouponByCode(
this._partnerId, couponCode)
// 如果优惠券不存在
if cp == nil {
log.PrintErr(err)
return order, cart, errors.New("优惠券无效")
}
coupon = cp.(promotion.ICouponPromotion)
result, err = coupon.CanUse(m, val.Fee)
if result {
if coupon.CanTake() {
_, err = coupon.GetTake(memberId)
//如果未占用，则占用
if err != nil {
err = coupon.Take(memberId)
}
} else {
_, err = coupon.GetBind(memberId)
}
if err != nil {
log.PrintErr(err)
return order, cart, errors.New("优惠券无效")
}
err = order.ApplyCoupon(coupon) //应用优惠券
}
}
return order, cart, err
}