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,

config/locales/de.yml

@@ -1444,6 +1444,7 @@ de:
       confirm_end: |-
         Willst Du wirklich die Bestellung %{order} beenden?
         Es gibt kein zurück.
+      confirm_send_to_supplier: Die Bestellung wurde bereit am %{when} zur Lieferantin geschickt. Willst du sie wirklich erneut schicken?
       create_invoice: Rechnung anlegen
       description1_order: "%{state} Bestellung von %{supplier} angelegt von %{who},"
       description1_period:

config/locales/en.yml

@@ -1454,6 +1454,7 @@ en:
       confirm_end: |-
         Do you really want to close the order %{order}?
         There is no going back.
+      confirm_send_to_supplier: The order has been sent to the supplier already on %{when}. Do you really want to send it again?
       create_invoice: Add invoice
       description1_order: "%{state} order from %{supplier} opened by %{who},"
       description1_period:

db/migrate/20171001000000_add_last_sent_mail_to_order.rb

@@ -0,0 +1,5 @@
+class AddLastSentMailToOrder < ActiveRecord::Migration
+  def change
+    add_column :orders, :last_sent_mail, :datetime
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170801000000) do
+ActiveRecord::Schema.define(version: 20171001000000) do
 
   create_table "article_categories", force: :cascade do |t|
     t.string "name",        limit: 255, default: "", null: false
@@ -243,6 +243,7 @@ ActiveRecord::Schema.define(version: 20170801000000) do
     t.datetime "boxfill"
     t.date     "pickup"
     t.integer  "invoice_id"
+    t.datetime "last_sent_mail"
   end
 
   add_index "orders", ["state"], name: "index_orders_on_state", using: :btree