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Backbone class for retrieving a users facebook friends. Supports pagination and search
# A small class that allows normal backbone interaction with
# the abomination that is the facebook api
# No view included due to the individuality of each solution
# the properties for the model are: uid, name, pic_square
class exports.FacebookFriendsList extends Backbone.Collection
#model: exports.InvitationFacebook
page: 0
search: ''
limit: 60
url: '/fql'
# Generate a query for the facebook open graph
# this uses fql for pagination and searching of users
query : ->
# Current users friends who are not on spling
url = "SELECT uid, name, pic_square FROM user WHERE has_added_app=0 AND
uid IN (SELECT uid2 FROM friend WHERE uid1 = me())"
# Any search parameters
unless is ''
url += " AND strpos(lower(name), '#{}') >= 0"
# Pagination
url += " ORDER BY name LIMIT #{@options.limit}
OFFSET #{*@options.limit}"
initialize: (appId, app_token)->
# Initialize the facebook api
appId : appId
app_token : app_token
status : true
# A custom fetch method that uses the facebook api
# instead of backbones fetch()
fetch: (options = {})->
console.log 'fql query', @query()
# This is the normal backbone behaviour
# turn the response into models and call any
# user defined success callbacks
success = (resp)=>
@[if options.add then 'add' else 'reset'](@parse(resp), options)
options.success(this, resp) if options.success
# Check the login status before calling the api
# without this expect an api error
FB.getLoginStatus( (response)=>
if response.status is 'connected'
FB.api '/fql', q: @query(), success
parse: (response)->

Example usage:

window.fbAsyncInit = ->
  @collection = new exports.FacebookFriendsList(app_id, users_facebook_auth token)
  @collection.on 'reset', @addAll
  @collection.on 'add', @addOne
  $(window).on 'scroll', @scrolling

And then in your template:

  // Load the SDK Asynchronously
     var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
     if (d.getElementById(id)) {return;}
     js = d.createElement('script'); = id; js.async = true;
     js.src = "//";
     ref.parentNode.insertBefore(js, ref);
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