events.coffee

define [
  'underscore'
  'backbone'
], (_, Backbone) ->
  Emitter = {}

  aliases =
    un: 'off'
    emit: 'trigger'
    fire: 'trigger'
    fireEvent: 'trigger'

  init = (bus) ->
    Aggregator = {}

    invoke = (method) ->
      ->
        bus[method].apply bus, arguments

    for method of bus
      Aggregator[method] = invoke method

    for method of aliases
      Aggregator[method] = invoke aliases[method]

    Aggregator.__get = ->
      bus

    Aggregator

  Emitter.addGroup = (group) ->
    if not Emitter[group]
      bus = init _.extend {}, Backbone.Events
      Emitter[group] = bus

    Emitter[group]

  Emitter.getGroup = (group) ->
    Emitter[group]

  Emitter.removeGroup = (group) ->
    Emitter[group].off()
    delete Emitter[group]
    Emitter

  _.extend Emitter, init(_.extend {}, Backbone.Events)