private void ConnectUserStreams()
{
// All tweets to the HomeTimeLine
UserStream.Tweets.Subscribe(AddToHomeTimeLine);
// MAGIC HAPPENS HERE
// there is no specific "catch" for mentions in the Userstream, but here we can fake it!
// Using LINQ, we can ask RX to show us incoming tweets that contain the screen name of the current user
// then push this into the "Mentions" Observable
UserStream.Tweets.Where(t => t.Text.ToLower().Contains(TwitterCredentials.ScreenName.ToLower())).Subscribe(_mentions.OnNext);
// specifically grab the Retweets in the timeline and show them
// obviously this can be added at a higher level, too.
UserStream.Tweets.Where(t => t.RetweetedStatus != null).Subscribe(_retweetsOnTimeline.OnNext);
// Treat Direct Messages separately
UserStream.DirectMessages.Subscribe(_directmessages.OnNext);
// Pull out my tweets, and publish separately
UserStream.Tweets.Where(t => t.User.UserId == TwitterCredentials.UserID).Subscribe(_mytweets.OnNext);
// also grab the delete events and publish
UserStream.DeleteEvents.Subscribe(de => _streamdeleteevent.OnNext(de.DeleteEventStatus));
UserStream.Start();
_userStreamConnected.OnNext(StreamSignal.Started);
}
/// <summary>
/// Start UserStreaming
/// </summary>
public void StartUserStreaming()
{
UserStream = UserSession.UserStreamBuilder();
// Separate stream events start
ConnectStreamEvents();
ConnectUserStreams();
// MORE MAGIC HAPPENS HERE
// The Userstreams only get tweets/direct messages from the point the connection is opened.
// Historical tweets/direct messages have to be gathered using the traditional paging/cursoring APIs
// (Request/Response REST).
// but the higher level client doesnt want to worry about all that complexity.
// in the BackfillPump, we gather these tweets/direct messages and pump them into the correct Observable
Task.Factory.StartNew(ProcessBackfillPump);
// If the UserStream disconnects, the userStreamConnected will fire & we'll reconnect
// TODO if stream connection doesnt connect, fail over to UserStream.UserStreamActive.Where(status => status.IsFalse()).Subscribe(StartPollingUpdates);
// TODO if cancellation requested externally, dont reconnect
UserStream.StreamActive.Where(status => status == StreamSignal.Stopped).Subscribe(_ =>
{
UserStream.Start();
});
}
/// <summary>
/// Stop UserStreaming
/// </summary>
public void StopUserStreaming()
{
UserStream.Stop();
_userStreamConnected.OnNext(StreamSignal.Stopped);
}