/// <summary>
/// Builds a race trace.
/// </summary>
/// <param name="raceData">The race data.</param>
/// <param name="referenceTime">The reference time.</param>
/// <param name="driverTeamLookup">The driver team lookup.</param>
/// <returns>An instance of <see cref="TraceData"/> class.</returns>
internal TraceData Build(RaceData raceData, ReferenceTime referenceTime, IReadOnlyDictionary <DriverCode, string> driverTeamLookup)
{
Guard.Argument(raceData, nameof(raceData)).NotNull();
Guard.Argument(referenceTime, nameof(referenceTime)).NotNull();
Guard.Argument(driverTeamLookup, nameof(driverTeamLookup)).NotNull().NotEmpty();
return(BuildTraceData(raceData, referenceTime, driverTeamLookup));
}
private static TraceData BuildTraceData(RaceData raceData, ReferenceTime referenceTime,
IReadOnlyDictionary <DriverCode, string> driverTeamLookup)
{
var raceDataCollection = raceData.AllDriverRaceData;
var driverTraces = raceDataCollection.Select(x => BuildTraceForDriver(x, referenceTime, driverTeamLookup[x.DriverCode]))
.ToArray();
return(new TraceData(driverTraces));
}
private static TimeSpan[] CalculateCumulativeTimes(ReferenceTime referenceTime, IEnumerable <TimeSpan> lapData)
{
var cumulativeLapTimes = lapData.CumulativeSum().ToList();
var cumulativeReferenceTimes = Enumerable.Range(1, cumulativeLapTimes.Count())
.Select(x => referenceTime.Time).CumulativeSum()
.ToList();
if (cumulativeLapTimes.Count != cumulativeReferenceTimes.Count)
{
throw new ApplicationException("Cumulative time arrays do not match.");
}
return(cumulativeReferenceTimes.Zip(cumulativeLapTimes, (refTime, lapTime) => refTime - lapTime).ToArray());
}
private static DriverTraceData BuildTraceForDriver(DriverRaceData driverRaceData, ReferenceTime referenceTime, string team)
{
var lapData = driverRaceData.GetAllLaps().Select(x => x.Time.TimeTaken);
var traceTimes = CalculateCumulativeTimes(referenceTime, lapData);
return(BuildTraceData(driverRaceData, traceTimes, team));
}
