public static void Run([TimerTrigger("0 */5 * * * *")] TimerInfo myTimer, ILogger log)
{
log.LogInformation($"C# Timer trigger function executed at: {DateTime.Now}");
//Configurable variables for Cosmos Query
var minPartitionId = DateTime.Now.ToString("yyyy-MM-dd HH");
var whereVariable = ".Type";
var orderByVariable = "._ts";
var queryBuilder = new StringBuilder();
queryBuilder.Append("SELECT Top 1* FROM ");
queryBuilder.Append(cosmosDoc).Append(" WHERE ").Append(cosmosDoc).Append(whereVariable).Append(" = \'balloon\'");
queryBuilder.Append(" ORDER BY ").Append(cosmosDoc).Append(orderByVariable).Append(" DESC");
log.LogInformation($"Query text: {queryBuilder.ToString()}");
var client = new DocumentClient(new Uri(cosmosUrl), cosmosKey);
FeedOptions feedOptions = new FeedOptions()
{
EnableCrossPartitionQuery = true
};
//Get latest balloon message from Cosmos
var balloonDocument =
client.CreateDocumentQuery <BalloonDocument>(UriFactory.CreateDocumentCollectionUri(cosmosDB, cosmosDoc),
queryBuilder.ToString(), feedOptions).AsEnumerable().FirstOrDefault();
log.LogInformation($"Balloon state: {balloonDocument.State}");
if (balloonDocument.TimestampUTC.AddMinutes(5) < DateTime.UtcNow)
{
log.LogInformation("No new information. Recent balloon time: " + balloonDocument.TimestampUTC.AddHours(-7).ToShortTimeString());
return;
}
if (balloonDocument.State == BalloonState.Landed)
{
log.LogInformation($"Balloon not in the air, no prediction calculated");
// TEST CODE
var fakePrediction = new PredictionDocument()
{
FlightId = balloonDocument.FlightId,
TrackerSource = balloonDocument.TrackerSource,
Geopoint = new Point(balloonDocument.Longitude, balloonDocument.Latitude),
Latitude = balloonDocument.Latitude,
Longitude = balloonDocument.Longitude,
partitionid = balloonDocument.partitionid,
LandingDateTime = DateTime.UtcNow
};
var predictionNotification = new PredictionNotification(fakePrediction, balloonDocument.Latitude, balloonDocument.Longitude);
SendPredictionNotification(predictionNotification);
return;
}
if (balloonDocument.AveAscent <= 5)
{
// climb rate of less than 1 is a invalid in habhub
log.LogInformation($"Balloon Ave Ascent rate too low ({balloonDocument.AveAscent}), adjusted to 5 m/s");
balloonDocument.AveAscent = 5;
}
if (balloonDocument.BurstAltitude > 30000)
{
log.LogInformation("Balloon burst set too high, forcing to 30,000 m.");
balloonDocument.BurstAltitude = 30000;
}
if ((balloonDocument.State == BalloonState.Rising) || (balloonDocument.State == BalloonState.PreLaunch))
{
try
{
PredictionEngine predictionEngine = new PredictionEngine();
var predictionDocument = predictionEngine.Generate(balloonDocument, log);
// enrich prediction document
if (predictionDocument != null)
{
predictionDocument.FlightId = balloonDocument.FlightId;
predictionDocument.TrackerSource = balloonDocument.TrackerSource;
predictionDocument.Geopoint = new Point(predictionDocument.Longitude, predictionDocument.Latitude);
predictionDocument.partitionid = balloonDocument.partitionid;
WriteDocument(predictionDocument).Wait();
try
{
var predictionNotification = new PredictionNotification(predictionDocument, balloonDocument.Latitude, balloonDocument.Longitude);
SendPredictionNotification(predictionNotification);
}
catch (Exception ex)
{
log.LogError(ex, "Failed to send prediction to notification function.");
}
}
}
catch (Exception ex)
{
log.LogError(ex, $"Failed to generate prediction: {ex.Message}");
}
}
else if (balloonDocument.State == BalloonState.Falling)
{
// can't create a new prediction will falling
var lastPredictionDocument = GetLastPrediction(balloonDocument.FlightId);
if (lastPredictionDocument != null)
{
lastPredictionDocument.DistanceToLanding = 10; // todo
var notification = new PredictionNotification(lastPredictionDocument, balloonDocument.Latitude, balloonDocument.Longitude);
// notify of balloon location
SendPredictionNotification(notification);
}
}
}
