public List<DetectedInterval> DetectIntervals(SessionDto session)
{
var sessionData = session.SessionData;
var interval = session.Interval;
var potentialIntervalStart = new SessionDataDto();
var detectedIntervalEnd = new SessionDataDto();
var detectedIntervals = new List<DetectedInterval>();
for (var x = 0; x < sessionData.Count; x++)
{
bool potentialIntervalDetected = false;
bool intervalDetected = false;
for (var p = x; p < sessionData.Count; p++)
{
// get average of proceeding 14 seconds of powers - time taken for rider to reach maximum power
var currentPowers = new List<double>();
var proceedingPowers = new List<double>();
for (var i = 0; i < 14; i++)
{
if (p + (i + 1) < sessionData.Count)
{
if (sessionData[p + i].Power == 0) // rider must be applying power for next 14 seconds
{
break;
}
currentPowers.Add(sessionData[p + i].Power); // get power for the next 14 seconds
proceedingPowers.Add(sessionData[(p + 1) + i].Power); // get power for the next 14 seconds starting at current power +1
}
}
if (currentPowers.Count == 0) // no powers added to the last - last detected power was 0
{
break;
}
var currentPowersAverage = currentPowers.Average();
var proceedingPowersAverage = proceedingPowers.Average();
// check for potential interval
if (currentPowersAverage < proceedingPowersAverage)
{
if (!potentialIntervalDetected)
{
potentialIntervalStart = sessionData[p];
potentialIntervalDetected = true;
}
}
else // possible that cyclist built up speed and reached interval speed to maintain
{
var potentialIntervalPowerToMaintain = sessionData[p].Power;
var percentage = ((potentialIntervalPowerToMaintain * 40) / 100);
var minimumPowerRange = potentialIntervalPowerToMaintain - percentage;
var maximumPowerRange = potentialIntervalPowerToMaintain + percentage;
var minimumIntervalDuration = 10; // interval power must be maintained for atleast 10 seconds
var timer = 0;
var counter = 1;
for (var q = p; q < sessionData.Count; q++)
{
if (sessionData[q].Power > minimumPowerRange && sessionData[q].Power < maximumPowerRange)
{
timer += interval * counter;
}
else
{
if (timer > minimumIntervalDuration)
{
intervalDetected = true;
detectedIntervalEnd = sessionData[q];
var startTime = potentialIntervalStart.Row * interval;
var finishTime = detectedIntervalEnd.Row * interval;
var intervalData = GetSessionDataSubset(new SessionDataSubsetDto() // get interval summary
{
MinimumSecond = startTime,
MaximumSecond = finishTime,
Unit = 0,
SessionId = session.Id
});
detectedIntervals.Add(new DetectedInterval(startTime, finishTime, intervalData.AveragePower, true));
}
break;
}
}
}
if (intervalDetected)
{
x = detectedIntervalEnd.Row * interval; // start detecting new interval at the end of the detected interval
potentialIntervalStart = sessionData[detectedIntervalEnd.Row];
break;
}
}
}
// detect workout and rest periods
var totalCount = sessionData.Count();
var totalPower = sessionData.Sum(s => s.Power);
var averagePower = Math.Round(totalPower / totalCount, 2, MidpointRounding.AwayFromZero);
var minimumIntervalPower = ((averagePower * 80) / 100); // workout periods must be greater than 30% of average session power
for (var f = 0; f < detectedIntervals.Count; f ++)
{
detectedIntervals[f].IsRest = detectedIntervals[f].AveragePower < minimumIntervalPower;
}
return detectedIntervals;
}
public void DateTimeDaysForSessionHeaderRowsShouldBeCalculatedByInterval()
{
var interval = 1;
var startDate = new DateTime(2016, 05, 10, 23, 59, 59, 1); // hh:mm:s:ms - 09:30:5:100
var sessionRow1 = new SessionDataDto() { Row = 0 };
var sessionRow2 = new SessionDataDto() { Row = 1 };
var sessionRow3 = new SessionDataDto() { Row = 2 };
// calculate seconds for each session header row
sessionRow1.Date = DateFormat.CalculateSessionDataRowDate(startDate, interval, sessionRow1.Row);
sessionRow2.Date = DateFormat.CalculateSessionDataRowDate(startDate, interval, sessionRow2.Row);
sessionRow3.Date = DateFormat.CalculateSessionDataRowDate(startDate, interval, sessionRow3.Row);
// assert seconds
Assert.AreEqual(59, sessionRow1.Date.Second);
Assert.AreEqual(0, sessionRow2.Date.Second);
Assert.AreEqual(1, sessionRow3.Date.Second);
// assert minutes
Assert.AreEqual(10, sessionRow1.Date.Day);
Assert.AreEqual(11, sessionRow2.Date.Day);
Assert.AreEqual(11, sessionRow3.Date.Day);
}