/// <summary>
/// Set user credentials for Twitter authentication
/// </summary>
/// <param name="actionContext"></param>
public override void OnActionExecuting(HttpActionContext actionContext)
{
base.OnActionExecuting(actionContext);
// Setup Twitter credentials
TweetinviUtilities.SetTwitterCredentials();
}
/// <summary>
/// Starts a Twitter Stream based on the specified geographic coordinates and the now playing hash tag
/// </summary>
/// <param name="latitude1">Latitude of user location (bottom_left)</param>
/// <param name="longitude1">Longitude of user location (bottom_left)</param>
/// <param name="latitude2">Latitude of user location (top_right)</param>
/// <param name="longitude2">Longitude of user location (top_right)</param>
public static async Task StartStream(double latitude1, double longitude1, double latitude2, double longitude2)
{
// Setup Twitter credentials
TweetinviUtilities.SetTwitterCredentials();
// If the stream does not exists...
if (_stream == null)
{
//...then it is started
// Create a filtered stream
_stream = Stream.CreateFilteredStream();
_stream.AddTrack(Constants.NOWPLAYING_HASHTAG); // Lookup for nowplaying hashtag
// OPTIONAL: if you want to see how the feed is updated really quick, just comment the following line of code.
// You will see the effect of "infinite scroll" in the client
_stream.AddLocation(
new Coordinates(latitude1, longitude1),
new Coordinates(latitude2, longitude2)); // Lookup in the specific geographic coordinates
// OPTIONAL: if you want to filter the stream just for a specific user, uncomment the following line of code
//_stream.AddFollow(2834545563);
// Event that handles a matching tweet
_stream.MatchingTweetReceived += async(sender, args) =>
{
// A OEmbed tweet is sent to the client
IOEmbedTweet embedTweet = Tweet.GetOEmbedTweet(args.Tweet);
await _context.Clients.All.updateFeed(embedTweet);
};
// Start the stream matching all conditions
await _stream.StartStreamMatchingAllConditionsAsync();
}
else
{
//... otherwise resume it
_stream.ResumeStream();
}
}
