Rails 3 session generator

session_generator.rb

  class SessionCookieGenerator
    def self.generate user_obj
      new(user_obj).generate
    end

    def initialize user_obj
      @user = user_obj
      @cookie = {}
      @session = {'rack.session' => {}}
    end

    def generate
      warden_session = Warden::SessionSerializer.new(@session)
      warden_session.store(@user, :admin_user)
      @cookie['warden.user.admin_user.key'] = @session['rack.session']['warden.user.admin_user.key']

      session_secret = App::Application.config.secret_token

      verifier = ActiveSupport::MessageVerifier.new(session_secret, digest: 'SHA1')
      verifier.generate @cookie.merge(session_id: SecureRandom.hex(16))
    end
  end