Add ability to accept or decline translations

app/controllers/admin/translations_controller.rb

@@ -1,18 +1,28 @@
 class Admin::TranslationsController < AdminController
-  before_action :set_translation, only: :show
+  before_action :set_translation, only: [:show, :accept, :decline]
 
   # GET /translations
-  # GET /translations.json
   def index
-    @translations = Translation.paginate(page: params[:page])
+    @translations = Translation.pending.order(created_at: :desc).paginate(page: params[:page])
   end
 
   # GET /translations/1
-  # GET /translations/1.json
   def show
   end
 
+  def accept
+    raise t('.must_be_pending') unless @translation.pending?
+    @translation.problem.set_translation(@translation)
+    redirect_to @translation.problem, notice: t('.success_message')
+  end
+
+  def decline
+    raise t('.must_be_pending') unless @translation.pending?
+    @translation.declined!
+    redirect_to admin_translations_path, notice: t('.success_message')
+  end
+
   def set_translation
-    @translation = Translation.find(params[:id])
+    @translation = Translation.find(params[:translation_id])
   end
 end