authenticates beta testers in beta site

app/controllers/application_controller.rb

@@ -1,7 +1,11 @@
 require "application_responder"
 
 class ApplicationController < ActionController::Base
-  before_filter :authenticate
+  before_filter :authenticate_http_basic
+
+  before_filter :authenticate_user!, unless: :devise_controller?, if: :beta_site?
+  before_filter :authenticate_beta_tester!, unless: :devise_controller?, if: :beta_site?
+
   check_authorization unless: :devise_controller?
   include SimpleCaptcha::ControllerHelpers
   self.responder = ApplicationResponder
@@ -16,7 +20,13 @@ class ApplicationController < ActionController::Base
 
   before_action :ensure_signup_complete
 
-  def authenticate
+  rescue_from CanCan::AccessDenied do |exception|
+    redirect_to main_app.root_url, alert: exception.message
+  end
+
+  private
+
+    def authenticate_http_basic
       if Rails.env.staging? || Rails.env.production?
         authenticate_or_request_with_http_basic do |username, password|
           username == Rails.application.secrets.username && password == Rails.application.secrets.password
@@ -24,11 +34,20 @@ class ApplicationController < ActionController::Base
       end
     end
 
-  rescue_from CanCan::AccessDenied do |exception|
+    def authenticate_beta_tester!
-    redirect_to main_app.root_url, alert: exception.message
+      unless beta_testers.include?(current_user.email)
+        sign_out(current_user)
+        redirect_to new_user_session_path, alert: "Sorry only Beta Testers are allowed access at the moment"
+      end
     end
 
-  private
+    def beta_testers
+      File.readlines('config/beta-testers.txt').map {|email| email }
+    end
+
+    def beta_site?
+      Rails.application.secrets.beta_site
+    end
 
     def set_locale
       if params[:locale] && I18n.available_locales.include?(params[:locale].to_sym)