public TestPlan(
Journey journey,
double journeysPerMinute,
FrequencyPattern frequency)
{
Journey = journey;
Frequency = frequency;
}
private int GetJourneyCountInPeriod(FrequencyPattern frequencyPattern, DateTime startTime, DateTime endTime)
{
int totalSeconds = Convert.ToInt32(endTime.Subtract(startTime).TotalSeconds);
return(Convert.ToInt32(
Enumerable.Range(0, totalSeconds)
.Select(s =>
new FrequencyService().GetCurrentFrequencyPerMinute(frequencyPattern, s) / 60)
.Sum()));
}
public double GetGraphFrequencyPerMinute(
FrequencyPattern frequencyPattern,
int timeEllapsedSeconds)
{
double maxX = frequencyPattern.Points.Max(p => p.UnitsFromStart);
double secondsPerPoint = (frequencyPattern.DurationSeconds / maxX);
var currentPosition = timeEllapsedSeconds / secondsPerPoint;
return(Enumerable.Range(0, frequencyPattern.Points.Count)
.Select(i => frequencyPattern.Points[i])
.Where(p => p.UnitsFromStart <= currentPosition)
.OrderByDescending(p => p.UnitsFromStart)
.First()
?.FrequencyPerMinute ?? 0);
}
public double GetCurrentFrequencyPerMinute(
FrequencyPattern frequencyPattern,
int timeEllapsedSeconds)
{
switch (frequencyPattern.PatternType)
{
case PatternType.Constant:
return(frequencyPattern.MaxJourneysPerMinute);
case PatternType.Gradual:
return(GetGradualFrequencyPerMinute(frequencyPattern, timeEllapsedSeconds));
case PatternType.Graph:
return(GetGraphFrequencyPerMinute(frequencyPattern, timeEllapsedSeconds));
default:
throw new ArgumentException("Frequency pattern not recognised");
}
}
public double GetGradualFrequencyPerMinute(
FrequencyPattern frequencyPattern,
int timeEllapsedSeconds)
{
if (timeEllapsedSeconds < frequencyPattern.RampUpSeconds)
{
return((frequencyPattern.MaxJourneysPerMinute / frequencyPattern.RampUpSeconds) * timeEllapsedSeconds);
}
var rampdownStart = frequencyPattern.DurationSeconds - frequencyPattern.RampDownSeconds;
if (timeEllapsedSeconds > rampdownStart)
{
double gradient = frequencyPattern.MaxJourneysPerMinute / frequencyPattern.RampDownSeconds;
return(frequencyPattern.MaxJourneysPerMinute - (gradient * timeEllapsedSeconds));
}
return(frequencyPattern.MaxJourneysPerMinute);
}
