public static DateRange FindIntersect(DateRange t1, DateRange t2)
{
var iRange = new DateRange
{
Start = t1.Start < t2.Start ? t2.Start : t1.Start,
End = t1.End < t2.End ? t1.End : t2.End
};
return iRange.Start >= iRange.End ? null : iRange;
}
/// <summary>
/// Returns -1 no conflict, Return 0 ignore first Return 1 ignore 2nd
/// </summary>
private static int IsConflictOrOverLap(ICongestionRate cp1, ICongestionRate cp2, Day day, VehicleType type)
{
var cr1DateRange = new DateRange(cp1.Start, cp1.End);
var cr2DateRange = new DateRange(cp2.Start, cp2.End);
var intersect = DateTimeIntersect.FindIntersect(cr1DateRange, cr2DateRange);
if (intersect == null) return -1;
return SelectTheMoreSpecific(cp1, cp2, day, type);
}
private static DateRange GetIntersectingTime(DateTime start, DateTime end, ICongestionRate rate)
{
var timeSpent = new DateRange(start, end);
var congestionRateRange = new DateRange(AddDatePartToCongestionTime(start, rate.Start), AddDatePartToCongestionTime(start, rate.End, true));
return DateTimeIntersect.FindIntersect(timeSpent, congestionRateRange);
}
