Update admin notifications translatable fields

The same way we did for banners.

We needed to add new translation keys so the labels are displayed in the
correct language. I've kept the original `title` and `body` attributes
so they can be used in other places.

While backporting, we also added the original translations because they
hadn't been backported yet.

app/controllers/admin/admin_notifications_controller.rb

@@ -63,8 +63,7 @@ class Admin::AdminNotificationsController < Admin::BaseController
   private
 
     def admin_notification_params
-      attributes = [:title, :body, :link, :segment_recipient,
-                    *translation_params(AdminNotification)]
+      attributes = [:link, :segment_recipient, translation_params(AdminNotification)]
 
       params.require(:admin_notification).permit(attributes)
     end

app/models/admin_notification.rb

@@ -4,9 +4,13 @@ class AdminNotification < ActiveRecord::Base
   translates :title, touch: true
   translates :body,  touch: true
   globalize_accessors
+  accepts_nested_attributes_for :translations, allow_destroy: true
+
+  translation_class.instance_eval do
+    validates :title, presence: true
+    validates :body, presence: true
+  end
 
-  validates :title, presence: true
-  validates :body, presence: true
   validates :segment_recipient, presence: true
   validate :validate_segment_recipient
 

app/views/admin/admin_notifications/_form.html.erb

@@ -5,12 +5,12 @@
 
   <%= f.select :segment_recipient, options_for_select(user_segments_options,
                                                       @admin_notification[:segment_recipient]) %>
-
-  <%= f.translatable_text_field :title %>
-
   <%= f.text_field :link %>
 
-  <%= f.translatable_text_area :body %>
+  <%= f.translatable_fields do |translations_form| %>
+    <%= translations_form.text_field :title %>
+    <%= translations_form.text_area :body %>
+  <% end %>
 
   <div class="margin-top">
     <%= f.submit t("admin.admin_notifications.#{admin_submit_action(@admin_notification)}.submit_button"),

config/locales/en/activerecord.yml

@@ -255,6 +255,14 @@ en:
         subject: Subject
         from: From
         body: Email content
+      admin_notification:
+        segment_recipient: Recipients
+        title: Title
+        link: Link
+        body: Text
+      admin_notification/translation:
+        title: Title
+        body: Text
       widget/card:
         label: Label (optional)
         title: Title

config/locales/es/activerecord.yml

@@ -255,6 +255,14 @@ es:
         subject: Asunto
         from: Enviado por
         body: Contenido del email
+      admin_notification:
+        segment_recipient: Destinatarios
+        title: Título
+        link: Enlace
+        body: Texto
+      admin_notification/translation:
+        title: Título
+        body: Texto
       widget/card:
         label: Etiqueta (opcional)
         title: Título

spec/features/admin/admin_notifications_spec.rb

@@ -185,7 +185,7 @@ feature "Admin Notifications" do
     notification = create(:admin_notification)
     visit edit_admin_admin_notification_path(notification)
 
-    fill_in :admin_notification_title_en, with: ''
+    fill_in "Title", with: ""
     click_button "Update notification"
 
     expect(page).to have_content error_message

spec/support/common_actions/notifications.rb

@@ -43,8 +43,8 @@ module Notifications
 
   def fill_in_admin_notification_form(options = {})
     select (options[:segment_recipient] || 'All users'), from: :admin_notification_segment_recipient
-    fill_in :admin_notification_title_en, with: (options[:title] || 'This is the notification title')
-    fill_in :admin_notification_body_en, with: (options[:body] || 'This is the notification body')
+    fill_in 'Title', with: (options[:title] || 'This is the notification title')
+    fill_in 'Text', with: (options[:body] || 'This is the notification body')
     fill_in :admin_notification_link, with: (options[:link] || 'https://www.decide.madrid.es/vota')
   end
 end