RefineryCMS integration with existing Rails 3.2.3

application.rb

...

# for refinery
  config.autoload_paths += Dir["#{config.root}/lib/**/"] # to load files from lib directory, including subfolders
    
config.before_initialize do
  require 'refinery_patch'
  require 'restrict_refinery_to_refinery_users'
end

include Refinery::Engine
  after_inclusion do
    [ApplicationController, ApplicationHelper].each do |c|
      c.send :include, ::RefineryPatch
    end
      
    ::Refinery::AdminController.send :include, ::RestrictRefineryToRefineryUsers
    ::Refinery::AdminController.send :before_filter, :restrict_refinery_to_refinery_users
end

Gemfile

source 'https://rubygems.org'

gem 'rails', '3.2.3'

gem 'pg'
gem 'thin'
gem 'activeadmin'
# Add users roles management
gem 'cancan'
# Add IP reverse geocoding support
gem 'geocoder'

## Add static pages management ##
##         REFINERY            ##
gem 'refinerycms-core'
gem 'refinerycms-dashboard'
gem 'refinerycms-images'
gem 'refinerycms-pages'
gem 'refinerycms-resources'
gem 'refinerycms-settings'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'
  gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

refinery_patch.rb

module RefineryPatch

  def self.included(base)
    base.send :helper_method, 
              :current_refinery_user, 
              :refinery_user_signed_in?, 
              :refinery_user? if base.respond_to? :helper_method
  end

  def current_refinery_user
    current_user
  end
  
  def just_installed?
    Role[:refinery].users.empty?
  end

  def refinery_user_signed_in?
    user_signed_in?
  end
    
  def refinery_user?
    refinery_user_signed_in? && current_refinery_user.has_role?(:refinery)
  end
  
  def authenticate_refinery_user!
    authenticate_user!
  end

  def store_location
    session[:return_to] = request.fullpath
  end
  
  def redirect_back_or_default(default)
    redirect_to(session[:return_to] || default)
    session[:return_to] = nil
  end
  
  protected
  def refinery_user_required?
    if just_installed? and %w[registrations users].exclude?(controller_name)
      redirect_to main_app.new_user_registration_path
    end
  end

end

restrict_refinery_to_refinery_users.rb

module RestrictRefineryToRefineryUsers

  def restrict_refinery_to_refinery_users
    return if current_user && current_user.has_role?(:refinery)
    redirect_to main_app.root_path #this user is not a refinery user because they have no refinery roles.
    return false
  end

end