Scaffold controller and route

app/assets/stylesheets/statistics.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the Statistics controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/statistics_controller.rb

@@ -0,0 +1,11 @@
+class StatisticsController < ApplicationController
+
+  def policy_class
+    StatisticsPolicy
+  end
+
+  def show
+    authorize self
+  end
+
+end

app/policies/statistics_policy.rb

@@ -0,0 +1,2 @@
+class StatisticsPolicy < AdminOnlyPolicy
+end

app/views/application/_navigation.html.slim

@@ -7,6 +7,7 @@
       ul.dropdown-menu role='menu'
         - if current_user.admin?
           li = link_to(t('breadcrumbs.dashboard.show'), admin_dashboard_path)
+          li = link_to(t('breadcrumbs.statistics.show'), statistics_path)
           li.divider
         - models = [ExecutionEnvironment, Exercise, ExerciseCollection, ProxyExercise, Tag, Consumer, CodeHarborLink, UserExerciseFeedback,
                 ErrorTemplate, ErrorTemplateAttribute, ExternalUser, FileType, FileTemplate, InternalUser].sort_by {|model| model.model_name.human(count: 2) }

app/views/statistics/show.html.slim

@@ -0,0 +1 @@
+h1 = t('shared.statistics')

config/locales/de.yml

@@ -217,6 +217,8 @@ de:
       show: Dashboard
     sessions:
       destroy_through_lti: Code-Abgabe
+    statistics:
+      show: "Statistiken"
   consumers:
     show:
       link: Konsument

config/locales/en.yml

@@ -217,6 +217,8 @@ en:
       show: Dashboard
     sessions:
       destroy_through_lti: Code Submission
+    statistics:
+      show: "Statistics"
   consumers:
     show:
       link: Consumer

config/routes.rb

@@ -42,6 +42,8 @@ Rails.application.routes.draw do
 
   get '/help', to: 'application#help'
 
+  get 'statistics/', to: 'statistics#show'
+
   concern :statistics do
     member do
       get :statistics