Allow for arbitrary pages mitre-cyber-academy#380

This makes it so users can put custom pages in ``app/views/arbitrary/`` to have their page show up on the navbar.

Author: camdenmoors

app/controllers/application_controller.rb

@@ -8,6 +8,7 @@ class ApplicationController < ActionController::Base
   before_action :store_user_location, if: :storable_location?
   before_action :set_paper_trail_whodunnit
   before_action :configure_permitted_parameters, if: :devise_controller?
+  before_action :set_arbitrary_pages
   helper :all
 
   def user_root_path
@@ -63,6 +64,10 @@ def prevent_action_after_game
 
   private
 
+  def set_arbitrary_pages
+    @arbitrary_pages = Dir['app/views/arbitrary/*']
+  end
+
   def preload_helper(*preload_objects)
     pl = ActiveRecord::Associations::Preloader.new
     preload_objects.filter! do |table|

app/views/layouts/_navbar.html.haml

@@ -18,3 +18,6 @@
         = always_link_to_if_admin(@game.open?, t('application.navbar.summary'), game_summary_path)
       %li
         = link_to_unless(@game.contact_url.blank?, t('application.navbar.contact'), @game.contact_url, target: '_blank'){}
+      - if @arbitrary_pages.any?
+        - @arbitrary_pages.each do |page|
+          %li= link_to File.basename(page, ".*").split('.').first.capitalize, '/arbitrary/' + File.basename(page, ".*")

config/routes.rb

@@ -5,6 +5,7 @@
   mount RailsAdmin::Engine => '/admin', :as => 'rails_admin'
 
   get 'home/index'
+  get '/arbitrary/:page' => 'arbitrary#show'
 
   devise_for :users,
              path_names: { sign_in: 'login', sign_out: 'logout', confirmation: 'confirm', sign_up: 'new' },