// 创建订单的所有逻辑都在这里
func (s *OrderService) CreateOrder(order *model.Order) (*model.Order, error) {
// 这个步骤很重要，判断是否订单已经存在了；如果存在了，需要换一个订单号再试；
if newtn := makeSureOrderTNUnique(order.TrackNumber); newtn > 0 {
order.TrackNumber = newtn
}
for _, detail := range order.Details {
detail.OrderTrackNumber = order.TrackNumber
}
var needUpdateBallance = false // 需要写入Person的累计欠款
// If order delivery method is `takeaway`, chagne order status to `delivering` and
// update account ballance; In other situation change status to `toprint`.
if order.DeliveryMethod == "TakeAway" {
order.Status = "delivering"
needUpdateBallance = true
} else {
order.Status = "toprint"
}
// organize some data
_processOrderCustomerPrice(order)
_calculateOrder(order)
// create order detail into db;
if order.Details != nil && len(order.Details) > 0 {
if err := orderdao.CreateOrderDetail(order.Details); err != nil {
return nil, err
}
}
// create order into db
// fmt.Println("======================================")
// fmt.Println("order.CreateTimeis ", order.CreateTime)
// fmt.Println("======================================")
if err := orderdao.CreateOrder(order); err != nil {
return nil, err
}
_update_order_accumulated(order) // debug option
// update account ballance
if needUpdateBallance {
Account.UpdateAccountBalance(order.CustomerId, -order.SumOrderPrice(),
"Create Order", order.TrackNumber)
// last step: update stocks. 修改累计欠款的时候就修改库存；
_reduceProductStocks(order.Details)
}
return order, nil
}
// Update Order 的所有逻辑都在这里了；
func (s *OrderService) UpdateOrder(order *model.Order) (*model.Order, error) {
// 更新 Tracking Number 到子订单的 Tracking No
for _, detail := range order.Details {
// TODO: additional check if order tracking number not match;
detail.OrderTrackNumber = order.TrackNumber
}
var needUpdateBallance = false
// If status change from other to takeaway, mark as need update ballance.
// Order中只包含新数据，旧的数据必须从数据库中取出了；也顺便再次验证是否存在这个订单；
if oldOrder, err := s.GetOrder(order.Id); err != nil {
return nil, err // panic(err)
} else {
// this makes mistake.
// if oldOrder.DeliveryMethod == "TakeAway" {
// return nil, errors.New("自提状态的订单不能再修改！")
// }
// 自提，非自提；状态是发货中，和其他
// 更新情况1： 修改订单时，由非自提状态改为自提状态，需要修改累计欠款;
if oldOrder.DeliveryMethod != "TakeAway" && order.DeliveryMethod == "TakeAway" {
order.Status = "delivering"
needUpdateBallance = true
}
// 更新情况2： 非自提状态点发货，}
if order.Status == "delivering" { // 需要修改累计欠款
if oldOrder.Status == "done" || oldOrder.Status == "canceled" {
return nil, errors.New(fmt.Sprintf("%s状态的订单状态不能修改为delivering！", oldOrder.Status))
}
needUpdateBallance = true
}
// update order
_processOrderCustomerPrice(order) // update order custumize price when confirm order.
_calculateOrder(order) // calculate order statistic fields.
_processingUpdateOrderDetails(order) // update order detail into db;
_update_order_accumulated(order) // debug option
// update order
if _, err := orderdao.UpdateOrder(order); err != nil {
return nil, err
}
}
// update account ballance. upate stocks left.
if needUpdateBallance {
// 代发的父订单不参与非累计欠款, 代发订单由其子订单负责参与累计欠款的统计；
// 代发父订单的逻辑应该也到不了这里。
fmt.Println(">> update account ballance. delta: ", -order.SumOrderPrice())
switch model.OrderType(order.Type) {
case model.Wholesale, model.SubOrder:
Account.UpdateAccountBalance(order.CustomerId, -order.SumOrderPrice(),
"Create Order", order.TrackNumber)
}
// update stocks
_reduceProductStocks(order.Details)
}
return order, nil
}
