`import Ember from 'ember'` Controller = Ember.Controller.extend needs: ['currentUser'] userBinding: 'controllers.currentUser' userName: (-> @get('user.name') || @get('user.login') ).property('user.login', 'user.name') gravatarUrl: (-> "#{location.protocol}//www.gravatar.com/avatar/#{@get('user.gravatarId')}?s=48&d=mm" ).property('user.gravatarId') actions: { toggleBurgerMenu: -> @toggleProperty('is-open') } `export default Controller`