Fixed caching UserDataService

userdatacaching.coffee

mod = angular.module('myApp.services', ['ngResource']);
mod.factory('UserData', ($resource,$location) ->
    return $resource('http://' + $location.host() + '/Services/userinfo')
  )
  .factory('UserDataStore', ($resource, $location, UserData, $q, $rootScope) ->

    GetUserDataFromXhr = () ->
      deferred = $q.defer()
      UserData.get((userdata) ->
        deferred.resolve userdata.userInfo
        )
      return deferred.promise

    GetUserDataFromStore = () ->
      deferred = $q.defer()
      Lawnchair ()->
        @get 'userdata',(result) ->
          deferred.resolve result
      return deferred.promise

    ReturnStoreResultOrXHRPromise = (result) ->
      if not result
        xPromise =  GetUserDataFromXhr()
        xPromise.then(SaveDataToLawnchair)
        return xPromise
      else
        resultObj = JSON.parse(result.value)
        return resultObj

    SaveDataToLawnchair = (result) ->
      resultString = JSON.stringify(result)
      userdata = {key:"userdata", value:resultString}
      Lawnchair () ->
        @save userdata

    return {
      Clear: () ->
        Lawnchair ()->
          @remove('userdata')
      Data: () ->
        sPromise = GetUserDataFromStore()
        combinedPromise = sPromise.then(ReturnStoreResultOrXHRPromise)
        return combinedPromise
      }
  )