feat:更新订单状态机

@@ -10,12 +10,12 @@ const (
 
 // 订单状态
 const (
-	ORDER_STATUS_SHIPPED  = iota + 1 // 已发货
-	ORDER_STATUS_TRANSIT             // 待收货
-	ORDER_STATUS_RECEIVED            // 已收货
-	ORDER_STATUS_RETURNED            // 已退货
-	ORDER_STATUS_CANCELED            //	已取消
-	ORDER_STATUS_CLOSED              // 已关闭
+	ORDER_STATUS_UNSHIPPED = iota + 1 // 待发货
+	ORDER_STATUS_TRANSIT              // 待收货
+	ORDER_STATUS_RECEIVED             // 已收货
+	ORDER_STATUS_RETURN               // 退换货
+	ORDER_STATUS_CANCELED             // 已取消（关闭）
+	ORDER_STATUS_COMPLETED            // 已完成
 )
 
 // 订单实体
@@ -60,23 +60,21 @@ type Order struct {
 	UpdateAt time.Time `json:"updateAt"`
 	// 软删
 	DeleteAt time.Time `json:"deleteAt"`
+	// 当前状态
+	CurrentStatus OrderStatus `json:"-"`
 }
 
-type OrderRepository interface {
-	Save(order *Order) (*Order, error)
-	Remove(order *Order) (*Order, error)
-	FindOne(queryOptions map[string]interface{}) (*Order, error)
-	Find(queryOptions map[string]interface{}) (int64, []*Order, error)
+type OrderStatus interface {
+	Update(order *Order, data map[string]interface{}) error // 更新订单
+	Checkout(order *Order) error                            // 下单
+	Return(order *Order) error                              // 退换货
+	Cancel(order *Order) error                              // 取消订单
+	Receive(order *Order) error                             // 收货
 }
 
-func (order *Order) Identify() interface{} {
-	if order.OrderId == 0 {
-		return nil
-	}
-	return order.OrderId
-}
+type UnShippedStatus struct{}
 
-func (order *Order) Update(data map[string]interface{}) error {
+func (status *UnShippedStatus) Update(order *Order, data map[string]interface{}) error {
 	if orderId, ok := data["orderId"]; ok {
 		order.OrderId = orderId.(int64)
 	}
@@ -190,3 +188,53 @@ func (order *Order) Update(data map[string]interface{}) error {
 	}
 	return nil
 }
+
+func (status *UnShippedStatus) Checkout(order *Order) error {
+	return nil
+}
+
+func (status *UnShippedStatus) Return(order *Order) error {
+	return nil
+}
+
+func (status *UnShippedStatus) Cancel(order *Order) error {
+	return nil
+}
+
+func (status *UnShippedStatus) Receive(order *Order) error {
+	return nil
+}
+
+type OrderRepository interface {
+	Save(order *Order) (*Order, error)
+	Remove(order *Order) (*Order, error)
+	FindOne(queryOptions map[string]interface{}) (*Order, error)
+	Find(queryOptions map[string]interface{}) (int64, []*Order, error)
+}
+
+func (order *Order) Identify() interface{} {
+	if order.OrderId == 0 {
+		return nil
+	}
+	return order.OrderId
+}
+
+func (order *Order) Update(data map[string]interface{}) error {
+	return order.CurrentStatus.Update(order, data)
+}
+
+func (order *Order) Checkout() error {
+	return order.CurrentStatus.Checkout(order)
+}
+
+func (order *Order) Return() error {
+	return order.CurrentStatus.Return(order)
+}
+
+func (order *Order) Receive() error {
+	return order.CurrentStatus.Receive(order)
+}
+
+func (order *Order) Cancel() error {
+	return order.CurrentStatus.Cancel(order)
+}