app.js.coffee

define ['backbone', 'marionette'], (Backbone, Marionette) ->
  App = new Marionette.Application

  App.on 'start', ->

    App.vent.on 'auth:login', ->
      console.log "Login"

    App.vent.on 'auth:logout', ->
      console.log "logout"

    require ['config/backbone/auth'], (Auth) ->
      if !Auth.get 'authenticated'
        console.log "Not authenticated"
        Auth.login {
          email: 'email@example.org'
          password: 'password'
        }
      else
        console.log "Authenticated"

  App

auth.js.coffee

define ['app', 'cookies'], (App, cookies) ->
  App.module 'Entities', (Entities, App, Backbone, Marionette, $, _) ->
    class Entities.AuthModel extends Backbone.Model
      defaults:
        cookieName: '_token'
        token: undefined
        tokenUrl: '/api/v1/sessions'
        authenticated: false

      initialize: ->
        @checkCookie()
        @_configureAjax()

      checkCookie: ->
        token = cookies.get @get('cookieName')
        token = undefined if !token?
        @set {
          authenticated: !!token
          token: token
        }

        App.vent.trigger 'auth:login', @get('token') if token

      login: (credentials) ->
        cookies.set(@get('cookieName'), '123321123')
        @checkCookie()

      logout: ->
        Cookies.expire @get('cookieName')
        @set {
          token: undefined
          authenticated: false
        }
        App.vent.trigger 'auth:logout'

      _configureAjax: ->
        auth = @
        Backbone.$.ajaxSetup
          beforeSend: (jqXHR) ->
            if auth.get('authenticated')
              jqXHR.setRequestHeader 'Authorization', 'Token token=' + auth.get('token')

  new App.Entities.AuthModel