(feat) cannot delete a product if it is used in order

app/controllers/api/products_controller.rb

@@ -40,7 +40,7 @@ class API::ProductsController < API::ApiController
 
   def destroy
     authorize @product
-    @product.destroy
+    ProductService.destroy(@product)
     head :no_content
   end
 

app/exceptions/cannot_delete_product_error.rb

@@ -0,0 +1,3 @@
+# Raised when delete a product if this product has used in order
+class CannotDeleteProductError < StandardError
+end

app/services/checkout/payment_service.rb

@@ -7,10 +7,10 @@ class Checkout::PaymentService
   include Payments::PaymentConcern
 
   def payment(order, operator, coupon_code, payment_id = '')
-    raise Cart::OutStockError unless Orders::OrderService.new.in_stock?(order, 'external')
-
     raise Cart::InactiveProductError unless Orders::OrderService.new.all_products_is_active?(order)
 
+    raise Cart::OutStockError unless Orders::OrderService.new.in_stock?(order, 'external')
+
     CouponService.new.validate(coupon_code, order.statistic_profile.user.id)
 
     amount = debit_amount(order)

app/services/product_service.rb

@@ -64,5 +64,20 @@ class ProductService
       update_stock(product, stock_movement_params)
       product
     end
+
+    def destroy(product)
+      used_in_order = OrderItem.joins(:order).where.not('orders.state' => 'cart')
+                               .exists?(orderable: product)
+      raise CannotDeleteProductError if used_in_order
+
+      ActiveRecord::Base.transaction do
+        orders_with_product = Order.joins(:order_items).where(state: 'cart').where('order_items.orderable': product)
+        orders_with_product.each do |order|
+          ::Cart::RemoveItemService.new.call(order, product)
+        end
+
+        product.destroy
+      end
+    end
   end
 end