add groupo order invoice and relation to group order

app/controllers/group_order_invoices_controller.rb

@@ -0,0 +1,38 @@
+class GroupOrderInvoicesController < ApplicationController
+  include Concerns::SendGroupOrderInvoicePdf
+
+  def show
+    @group_order_invoice = GroupOrderInvoice.find(params[:id])
+    if FoodsoftConfig[:contact][:tax_number]
+      respond_to do |format|
+        format.pdf do
+          send_group_order_invoice_pdf @group_order_invoice if FoodsoftConfig[:contact][:tax_number]
+        end
+      end
+    else raise RecordInvalid
+      redirect_back fallback_location: root_path, notice: 'Something went wrong', :alert => I18n.t('errors.general_msg', :msg => "#{error} " + I18n.t('errors.check_tax_number'))
+    end
+  end
+
+  def destroy
+    goi = GroupOrderInvoice.find(params[:id])
+    @order = goi.group_order.order
+    goi.destroy
+    respond_to do |format|
+      format.js
+      format.json { head :no_content }
+    end
+  end
+
+  def create
+    go = GroupOrder.find(params[:group_order])
+    @order = go.order
+    goi = GroupOrderInvoice.find_or_create_by!(group_order_id: go.id)
+    respond_to do |format|
+      format.js
+    end
+    redirect_back fallback_location: root_path
+  rescue => error
+    redirect_back fallback_location: root_path, notice: 'Something went wrong', :alert => I18n.t('errors.general_msg', :msg => error)
+  end
+end