FriendsAndInterests.swift

   func fetchUserFriendsList() {
        FBSDKGraphRequest(graphPath: "/me/taggable_friends", parameters: ["fields":"id", "limit": 5000]).startWithCompletionHandler({ connection, results, error in
            guard let resutlsDictionary = results as? NSDictionary,
                let friends = resutlsDictionary.valueForKey("data") as? [NSDictionary] else {
                    return
            }

            var friendsArray:[String] = []

            for friend in friends {
                if let id = friend.valueForKey("id") as? String {
                    friendsArray.append(id)
                }
            }

            DataManager.sharedInstance.saveUsersFriendsToParse(friendsArray)
        })
    }

    func fetchCurrentUsersLikes(nextPageUrlString: String?, failureHandler: (error: NSError) -> Void) {
        var parameters = ["fields":"id"]

        if let nextPageUrlString = nextPageUrlString {
            parameters["after"] = nextPageUrlString
        }

        FBSDKGraphRequest(graphPath: "me/likes", parameters: parameters).startWithCompletionHandler { connection, results, error in
            guard let userLikes = results as? NSDictionary else {
                return
            }

            self.likeCounter += userLikes.count

            guard let afterUrlString = userLikes.valueForKeyPath("paging.cursors.after") as? String else {
                DataManager.sharedInstance.saveUsersLikeCountToParse(self.likeCounter)
                return
            }

            self.fetchCurrentUsersLikes(afterUrlString, failureHandler: { error in })
        }
    }