gistfile1.coffee

App.FriendCache = Em.Object.extend
  init: ->
    @store = App.__container__.lookup('store:main')

  findAll: ->
    localforage.getItem('friends').then (cfriends)=>
      if Em.isEmpty(cfriends)
        @findAndCache()
      else
        allFriends = @store.all('friend')
        if Em.isEmpty allFriends
          cfriends.map (cfriend)=>
            @store.createRecord('friend', cfriend)
        else
          allFriends

  findAndCache: ->
    @store.find('friend').then (friends)->
      cfriends = friends.map (friend)->
        if friend.id
          s = friend.serialize() 
          s.id = friend.id
          s.group_ids = friend._data.groups.mapBy('id')
          s
      localforage.setItem('friends', cfriends.compact())
      friends