add routes for ics on customer level

app/controllers/api/v1/customers_controller.rb

@@ -96,6 +96,34 @@ def checkout_url
         end
       end
 
+      # note: for DunningCampaign we don't have open api actions at all :thinking:
+      def update_invoice_custom_sections
+        customer = current_organization.customers.find_by(external_id: params[:customer_external_id])
+        applicable_invoice_custom_section_ids = current_organization.invoice_custom_sections.where(code: params[:invoice_custom_section_codes]).ids
+        result = ::Customers::UpdateService.call(
+          customer: customer,
+          args: params.permit(:skip_invoice_custom_sections).merge(applicable_invoice_custom_section_ids:)
+        )
+
+        if result.success?
+          render_customer(result.customer)
+        else
+          render_error_response(result)
+      end
+
+      def applicable_invoice_custom_sections
+        customer = current_organization.customers.find_by(external_id: params[:customer_external_id])
+        applicable_invoice_custom_sections = customer.applicable_invoice_custom_sections
+
+        render(
+          json: ::CollectionSerializer.new(
+            applicable_invoice_custom_sections,
+            ::V1::InvoiceCustomSectionSerializer,
+            collection_name: 'applicable_invoice_custom_sections'
+          )
+        )
+      end
+
       private
 
       def create_params

config/routes.rb

@@ -22,11 +22,13 @@
 
       resources :customers, param: :external_id, only: %i[create index show destroy] do
         get :portal_url
+        get :applicable_invoice_custom_sections
 
         get :current_usage, to: 'customers/usage#current'
         get :past_usage, to: 'customers/usage#past'
 
         post :checkout_url
+        post :update_invoice_custom_sections
 
         scope module: :customers do
           resources :applied_coupons, only: %i[destroy]