Observer pattern implementation in Angular. This factory dispatches messages to controllers, directives, or other services.

dispatcher.coffee

module.directive "someDirectiveDispatcher", (Messenger)->
  
  return{
    restrict: "E"
    template: "<h1>Test</h1>"
    controller: ($scope)->
      $scope.elementClickEvent = ()->
        Messenger.call Messenger.REFRESH_SOMETHING
  }

messenger.coffee

module.factory "Messenger", ($rootScope)->
  messenger = {}
  messenger.message = ""

  messenger.call = (msg_type, message)->
      @message = message
      @broadcast(msg_type)

  messenger.broadcast = (msg_type)->
      $rootScope.$broadcast msg_type
      
  messenger.REFRESH_SOMETHING = "refresh_something"

  return messenger

observer.coffee

module.directive "someDirective", (Messenger)->
  
  updateCode = ()->
    console.log "update this thing!"
  
  return{
    restrict: "E"
    template: "<h1>Test</h1>"
    link: ($scope, element, attrs)->
      $scope.$on Messenger.REFRESH_SOMETHING, ()->
        updateCode()
  }