MyDriving.ViewModel.CurrentTripViewModel.Geolocator_PositionChanged C# (CSharp) Method

        async void Geolocator_PositionChanged(object sender, PositionEventArgs e)
        {
            // Only update the route if we are meant to be recording coordinates
            if (IsRecording)
            {
                var userLocation = e.Position;

                TripPoint previous = null;
                double newDistance = 0;
                if (CurrentTrip.Points.Count > 1)
                {
                    previous = CurrentTrip.Points[CurrentTrip.Points.Count - 1];
                    newDistance = DistanceUtils.CalculateDistance(userLocation.Latitude,
                        userLocation.Longitude, previous.Latitude, previous.Longitude);

                    if (newDistance > 4) // if more than 4 miles then gps is off don't use
                        return;
                }

                var point = new TripPoint
                    {
                        TripId = CurrentTrip.Id,
                        RecordedTimeStamp = DateTime.UtcNow,
                        Latitude = userLocation.Latitude,
                        Longitude = userLocation.Longitude,
                        Sequence = CurrentTrip.Points.Count,
                        Speed = -255,
                        RPM = -255,
                        ShortTermFuelBank = -255,
                        LongTermFuelBank = -255,
                        ThrottlePosition = -255,
                        RelativeThrottlePosition = -255,
                        Runtime = -255,
                        DistanceWithMalfunctionLight = -255,
                        EngineLoad = -255,
                        MassFlowRate = -255,
                        EngineFuelRate = -255,
                        VIN = "-255"
                    };
       
                //Add OBD data
                if (obdDataProcessor != null)
                    point.HasSimulatedOBDData = obdDataProcessor.IsObdDeviceSimulated;
                await AddOBDDataToPoint(point);

                CurrentTrip.Points.Add(point);

                try
                {
                    if (obdDataProcessor != null)
                    {
                        //Push the trip data packaged with the OBD data to the IOT Hub
                        obdDataProcessor.SendTripPointToIOTHub(CurrentTrip.Id, CurrentTrip.UserId, point);
                    }
                }
                catch (Exception ex)
                {
                    Logger.Instance.Report(ex);
                }

                if (CurrentTrip.Points.Count > 1 && previous != null)
                {
                    CurrentTrip.Distance += newDistance;
                    Distance = CurrentTrip.TotalDistanceNoUnits;

                    //calculate gas usage
                    var timeDif1 = point.RecordedTimeStamp - previous.RecordedTimeStamp;
                    CurrentTrip.FuelUsed += fuelConsumptionRate * 0.00002236413 * timeDif1.TotalSeconds;
                    if (CurrentTrip.FuelUsed == 0)
                        FuelConsumption = "N/A";
                    else
                        FuelConsumption = Settings.MetricUnits
                            ? (CurrentTrip.FuelUsed * 3.7854).ToString("N2")
                            : CurrentTrip.FuelUsed.ToString("N2");
                }
                else
                {
                    CurrentTrip.FuelUsed = 0;
                    FuelConsumption = "N/A";
                }

                var timeDif = point.RecordedTimeStamp - CurrentTrip.RecordedTimeStamp;

                //track seconds, minutes, then hours
                if (timeDif.TotalMinutes < 1)
                    ElapsedTime = $"{timeDif.Seconds}s";
                else if (timeDif.TotalHours < 1)
                    ElapsedTime = $"{timeDif.Minutes}m {timeDif.Seconds}s";
                else
                    ElapsedTime = $"{(int)timeDif.TotalHours}h {timeDif.Minutes}m {timeDif.Seconds}s";

                if (point.EngineLoad != -255)
                    EngineLoad = $"{(int)point.EngineLoad}%";

                FuelConsumptionUnits = Settings.MetricUnits ? "Liters" : "Gallons";
                DistanceUnits = Settings.MetricDistance ? "Kilometers" : "Miles";

                OnPropertyChanged("Stats");
            }

            CurrentPosition = e.Position;
        }