Return a promise from a controller action in Ember?

I have a component that needs to communicate with a controller and eventually perform some clean up after the controller says everything is ok (ie, jQuery "un"-initialization). I think the best way to accomplish this is with a promise so that the component can clean up after the controller completes its task. But how can a controller action return a promise? Alternatively, can a component call a dynamic method directly on a controller?

For example, lets say I have a ModalDialogComponent.

App.ModalDialogComponent = Ember.Component.extend
  didInsertElement: -> 
    @$('.modal').modal('show')

  actions:
    save: ->
      @sendAction('save').then(@closeModal.bind(@))

    # some other actions are omitted

  closeModal: ->
    @$('.modal').modal('hide')

And I can instantiate the component inside a template named foo,

{{modal-form save="save" ...}}

And implement the save method on FooController

App.FooController = Ember.ObjectController.extend
  save: ->
    # how can we tell the component that this was successful?

As you can see, I only want the closeModal function to execute if the save action was successful. In other words, only close the modal if the record was saved successfully.

Is this possible, or am I going about it completely wrong?