public FreeToPlayPeriod AddFreeToPlayPeriod(DateTime begin, DateTime end, DateTime now)
{
// Do not allow past periods to be added
if (end <= now)
{
Trace.TraceInformation($"End {end} is before now {now}");
return null;
}
FreeToPlayPeriod freeToPlayPeriod = new FreeToPlayPeriod(begin, end);
FreeToPlayPeriod intersectingfreeToPlayPeriod = FreeToPlayPeriods.FirstOrDefault(freeToPlayPeriod.Intersects);
// Periods are to be mutually exclusive to make it easier to identify which one is being applied
if (intersectingfreeToPlayPeriod != null)
{
Trace.TraceInformation($"Found intersecting periods {freeToPlayPeriod} and {intersectingfreeToPlayPeriod} for {Name}");
return null;
}
_freeToPlayPeriods.Add(freeToPlayPeriod);
Trace.TraceInformation($"Added {freeToPlayPeriod} for {Name}");
return freeToPlayPeriod;
}
public void Remove(FreeToPlayPeriod freeToPlayPeriod)
{
_freeToPlayPeriods.Remove(freeToPlayPeriod);
Trace.TraceInformation($"Removed {freeToPlayPeriod} for {Name}");
}
// Indicates whether the period intersects with another period public bool Intersects(FreeToPlayPeriod freeToPlayPeriod) => Begin < freeToPlayPeriod.End && freeToPlayPeriod.Begin < End;