public void GetBannedUsers(string streamName)
        {
            TwitterStream ts = streamManager.GetStream(streamName);

            if (ts != null)
            {
                Clients.Group(streamName).receiveBannedUsers(ts.GetBannedUsers());
            }
        }
        public void BanUser(Tweet tweet, string streamName)
        {
            TwitterStream ts = streamManager.GetStream(streamName);

            if (ts != null)
            {
                Tweet serverTweet   = ts._tweetRepo.Find(t => t.Id == tweet.Id && t.Event.Name == streamName).SingleOrDefault();
                User  alreadyBanned = ts._userRepo.Find(user => user.UserId == serverTweet.UserId && user.Event.Name == streamName).SingleOrDefault();
                if (alreadyBanned == null && serverTweet != null)
                {
                    User newUser = new User(serverTweet.UserId, serverTweet.Handle);
                    newUser.Type  = Common.BanType;
                    newUser.Event = ts.GetStreamEvent();
                    ts._userRepo.Add(newUser);
                    List <Tweet> tweetsToDelete = ts._tweetRepo.Find(t => (t.UserId == serverTweet.UserId) && (t.Event.Name == streamName)).ToList();
                    foreach (Tweet aTweet in tweetsToDelete)
                    {
                        RemoveTweet(aTweet.Id, streamName);
                    }
                    Clients.Group(streamName).userBanned(ts.GetBannedUsers());
                    ts.RemoveTweetsByHandle(newUser.Handle);
                }
            }
        }