go routine and removing cart

app/delivery/web/api/restricted/orders.go

@@ -144,6 +144,7 @@ func (h *OrdersHandler) ChangeOrderAddress(c fiber.Ctx) error {
 }
 
 // we base permissions and user based on target user only.
+// TODO: well, permissions and all that.
 func (h *OrdersHandler) ChangeOrderStatus(c fiber.Ctx) error {
 	user, ok := localeExtractor.GetCustomer(c)
 	if !ok {

app/repos/cartsRepo/cartsRepo.go

@@ -9,6 +9,7 @@ import (
 type UICartsRepo interface {
 	CartsAmount(user_id uint) (uint, error)
 	CreateNewCart(user_id uint) (model.CustomerCart, error)
+	RemoveCart(user_id uint, cart_id uint) error
 	UserHasCart(user_id uint, cart_id uint) (bool, error)
 	UpdateCartName(user_id uint, cart_id uint, new_name string) error
 	RetrieveCartsInfo(user_id uint) ([]model.CustomerCart, error)
@@ -49,6 +50,14 @@ func (repo *CartsRepo) CreateNewCart(user_id uint) (model.CustomerCart, error) {
 	return cart, err
 }
 
+func (repo *CartsRepo) RemoveCart(user_id uint, cart_id uint) error {
+	return db.DB.
+		Table("b2b_customer_carts").
+		Where("cart_id = ? AND user_id = ?", cart_id, user_id).
+		Delete(nil).
+		Error
+}
+
 func (repo *CartsRepo) UserHasCart(user_id uint, cart_id uint) (bool, error) {
 	var amt uint
 

app/service/cartsService/cartsService.go

@@ -34,6 +34,18 @@ func (s *CartsService) CreateNewCart(user_id uint) (model.CustomerCart, error) {
 	return cart, nil
 }
 
+func (s *CartsService) RemoveCart(user_id uint, cart_id uint) error {
+	exists, err := s.repo.UserHasCart(user_id, cart_id)
+	if err != nil {
+		return err
+	}
+	if !exists {
+		return responseErrors.ErrUserHasNoSuchCart
+	}
+
+	return s.repo.RemoveCart(user_id, cart_id)
+}
+
 func (s *CartsService) UpdateCartName(user_id uint, cart_id uint, new_name string) error {
 	exists, err := s.repo.UserHasCart(user_id, cart_id)
 	if err != nil {

app/service/orderService/orderService.go

@@ -87,14 +87,24 @@ func (s *OrderService) PlaceNewOrder(user_id uint, cart_id uint, name string, co
 	if err != nil {
 		return err
 	}
+	// from this point onward we do not cancel this order.
 
-	// send email to admin
-	err = s.emailService.SendNewOrderPlacedNotification(user_id)
+	// if no error is returned, remove the cart. This should be smooth
+	err = s.cartsRepo.RemoveCart(user_id, cart_id)
 	if err != nil {
-		// Log error but don't fail placing order???
+		// Log error but don't fail placing order
 		_ = err
 	}
 
+	// send email to admin
+	go func(user_id uint) {
+		err := s.emailService.SendNewOrderPlacedNotification(user_id)
+		if err != nil {
+			// Log error but don't fail placing order
+			_ = err
+		}
+	}(user_id)
+
 	return nil
 }