Save the timestamp of the last mail to supplier and confirm resending it

app/controllers/orders_controller.rb

@@ -118,6 +118,7 @@ class OrdersController < ApplicationController
   def send_result_to_supplier
     order = Order.find(params[:id])
     Mailer.order_result_supplier(@current_user, order).deliver_now
+    order.update!(last_sent_mail: Time.now)
     redirect_to order, notice: I18n.t('orders.send_to_supplier.notice')
   rescue => error
     redirect_to order, alert: I18n.t('errors.general_msg', :msg => error.message)

app/views/orders/show.html.haml

@@ -87,7 +87,9 @@
         = link_to t('.stock_order'), new_group_order_path(:order_id => @order.id, :stock_order => true), class: 'btn'
       = link_to t('ui.edit'), edit_order_path(@order), class: 'btn'
     - elsif not @order.closed? and not @order.stockit?
-      = link_to t('.send_to_supplier'), send_result_to_supplier_order_path(@order), method: :post, class: 'btn btn-primary'
+      = link_to t('.send_to_supplier'), send_result_to_supplier_order_path(@order), method: :post,
+        class: "btn#{' btn-primary' unless @order.last_sent_mail}",
+        data: {confirm: @order.last_sent_mail && t('.confirm_send_to_supplier', when: format_time(@order.last_sent_mail)) }
       = receive_button @order
     - unless @order.closed?
       = link_to t('ui.delete'), @order, data: {confirm: t('.confirm_delete')}, method: :delete,