feat:添加其他状态

 package domain
 
-import "time"
+import (
+	"fmt"
+	"time"
+)
 
 // 订单类型
 const (
@@ -11,7 +14,7 @@ const (
 // 订单状态
 const (
 	ORDER_STATUS_UNSHIPPED = iota + 1 // 待发货
-	ORDER_STATUS_TRANSIT              // 待收货
+	ORDER_STATUS_TRANSIT              // 待收货（运输中）
 	ORDER_STATUS_RECEIVED             // 已收货
 	ORDER_STATUS_RETURN               // 退换货
 	ORDER_STATUS_CANCELED             // 已取消（关闭）
@@ -64,6 +67,7 @@ type Order struct {
 	CurrentStatus OrderStatus `json:"-"`
 }
 
+// 订单状态机
 type OrderStatus interface {
 	Update(order *Order, data map[string]interface{}) error // 更新订单
 	Checkout(order *Order) error                            // 下单
@@ -72,8 +76,10 @@ type OrderStatus interface {
 	Receive(order *Order) error                             // 收货
 }
 
+// 代发货状态
 type UnShippedStatus struct{}
 
+// 编辑待发货订单
 func (status *UnShippedStatus) Update(order *Order, data map[string]interface{}) error {
 	if orderId, ok := data["orderId"]; ok {
 		order.OrderId = orderId.(int64)
@@ -194,7 +200,7 @@ func (status *UnShippedStatus) Checkout(order *Order) error {
 }
 
 func (status *UnShippedStatus) Return(order *Order) error {
-	return nil
+	return fmt.Errorf("待发货订单不能退货")
 }
 
 func (status *UnShippedStatus) Cancel(order *Order) error {
@@ -202,9 +208,126 @@ func (status *UnShippedStatus) Cancel(order *Order) error {
 }
 
 func (status *UnShippedStatus) Receive(order *Order) error {
+	return fmt.Errorf("待发货订单不能收货")
+}
+
+// 待收货状态
+type TransitStatus struct{}
+
+// 待收货订单不允许编辑
+func (status *TransitStatus) Update(order *Order, data map[string]interface{}) error {
+	return fmt.Errorf("已发货订单不允许编辑")
+}
+
+func (status *TransitStatus) Checkout(order *Order) error {
+	return fmt.Errorf("待收货订单不能重复发货")
+}
+
+func (status *TransitStatus) Return(order *Order) error {
+	return nil
+}
+
+func (status *TransitStatus) Cancel(order *Order) error {
+	return fmt.Errorf("待收货订单不能取消")
+}
+
+func (status *TransitStatus) Receive(order *Order) error {
+	return nil
+}
+
+// 收货状态
+type ReceivedStatus struct{}
+
+func (status *ReceivedStatus) Update(order *Order, data map[string]interface{}) error {
+	return fmt.Errorf("已收货订单不能编辑")
+}
+
+func (status *ReceivedStatus) Checkout(order *Order) error {
+	return fmt.Errorf("已收货订单不能重复发货")
+}
+
+func (status *ReceivedStatus) Return(order *Order) error {
+	return nil
+}
+
+func (status *ReceivedStatus) Cancel(order *Order) error {
+	return fmt.Errorf("已收货订单不能取消")
+}
+
+func (status *ReceivedStatus) Receive(order *Order) error {
+	return fmt.Errorf("已收货订单不能重复收货")
+}
+
+// 退货状态
+type ReturnedStatus struct{}
+
+func (status *ReturnedStatus) Update(order *Order, data map[string]interface{}) error {
+	return fmt.Errorf("已退货订单不允许编辑")
+}
+
+func (status *ReturnedStatus) Checkout(order *Order) error {
+	return fmt.Errorf("已退货订单不允许发货")
+}
+
+func (status *ReturnedStatus) Return(order *Order) error {
+	return fmt.Errorf("已退货订单不允许再次退货")
+}
+
+func (status *ReturnedStatus) Cancel(order *Order) error {
+	return fmt.Errorf("已退货订单不能取消")
+}
+
+func (status *ReturnedStatus) Receive(order *Order) error {
+	return fmt.Errorf("已退货订单不能收货")
+}
+
+// 取消状态
+type CanceledStatus struct{}
+
+func (status *CanceledStatus) Update(order *Order, dat map[string]interface{}) error {
+	return fmt.Errorf("已取消订单不能编辑")
+}
+
+func (status *CanceledStatus) Checkout(order *Order) error {
+	return fmt.Errorf("已取消订单不能发货")
+}
+
+func (status *CanceledStatus) Return(order *Order) error {
+	return fmt.Errorf("已取消订单不能退货")
+}
+
+func (status *CanceledStatus) Cancel(order *Order) error {
+	return fmt.Errorf("已取消订单不能再次取消")
+}
+
+func (status *CanceledStatus) Receive(order *Order) error {
+	return fmt.Errorf("已取消订单不能进行收货")
+}
+
+// 已完成状态
+type CompletedStatus struct{}
+
+func (status *CompletedStatus) Update(order *Order, data map[string]interface{}) error {
 	return nil
 }
 
+func (status *CompletedStatus) Checkout(order *Order) error {
+	return fmt.Errorf("已完成订单不能发货")
+}
+
+func (status *CompletedStatus) Return(order *Order) error {
+	return fmt.Errorf("已完成订单不能退货")
+}
+
+func (status *CompletedStatus) Cancel(order *Order) error {
+	return fmt.Errorf("已完成订单不能取消")
+}
+
+func (status *CompletedStatus) Receive(order *Order) error {
+	return fmt.Errorf("已完成订单不能收货")
+}
+
+// 订单仓储
 type OrderRepository interface {
 	Save(order *Order) (*Order, error)
 	Remove(order *Order) (*Order, error)