/// <summary>
/// Get the time span when route must start to satisfy first break.
/// </summary>
/// <param name="startTimeRange">TimeRange in which route can left start location.</param>
/// <param name="firstBreak">TimeWindowBreak.</param>
/// <param name="tripMaxDuration">Max trip duration.</param>
/// <returns>TimeSpan?.</returns>
private TimeSpan?_GetRealStart(TimeRange startTimeRange,
TimeWindowBreak firstBreak, TimeSpan tripMaxDuration)
{
// Calculate trip possible time range.
var tripPossibleTimeRange = startTimeRange.Clone() as TimeRange;
tripPossibleTimeRange.To += tripMaxDuration;
// Get finishTimeRange of trip and break time ranges.
var intersection = tripPossibleTimeRange.Intersection(
new TimeRange(firstBreak.EffectiveFrom, firstBreak.EffectiveFrom));
// If they intersects - calculate trip start.
if (intersection != null)
{
return(_MinTimeSpan(startTimeRange.To, intersection.To));
}
else
{
return(null);
}
}
/// <summary>
/// Return trip time range, which will allow to visit finish location.
/// </summary>
/// <param name="tripTimeRange">TimeRange.</param>
/// <param name="endLocationTimeWindow">TimeWindow.</param>
/// <param name="tripDuration">Trip max duration.</param>
/// <returns>Trip time range if it was found, null otherwise.</returns>
private TimeRange _GetTripTimeRangeOptimalForEndlLocation(
TimeRange tripTimeRange, TimeWindow endLocationTimeWindow, TimeSpan tripDuration)
{
TimeRange result = null;
// Calculate time window in which trip can be finished.
var tripFinishTimeRange = tripTimeRange.Clone() as TimeRange;
tripFinishTimeRange.To += tripDuration;
// If after finishing trip end location can be visited - calculate trip time window.
var finishTimeRange = tripFinishTimeRange.Intersection(
new TimeRange(endLocationTimeWindow));
if (finishTimeRange != null && finishTimeRange.Length.TotalMinutes > _route.TimeAtEnd)
{
var tripStart = tripTimeRange.From > finishTimeRange.From ?
tripTimeRange.From : finishTimeRange.From;
result = new TimeRange(tripStart, tripStart + tripDuration);
}
return(result);
}