/// <summary>
/// Calculate the schedule working time between the specified dates and times
/// </summary>
/// <param name="from">Starting date and time</param>
/// <param name="to">Ending date and time</param>
/// <returns>Duration</returns>
public Duration CalculateWorkingTime(LocalDateTime from, LocalDateTime to)
{
if (from.CompareTo(to) > 0)
{
string msg = string.Format(WorkSchedule.GetMessage("end.earlier.than.start"), to, from);
throw new Exception(msg);
}
Duration sum = Duration.Zero;
LocalDate thisDate = from.Date;
LocalTime thisTime = from.TimeOfDay;
LocalDate toDate = to.Date;
LocalTime toTime = to.TimeOfDay;
int dayCount = Rotation.GetDayCount();
// get the working shift from yesterday
Shift lastShift = null;
LocalDate yesterday = thisDate.PlusDays(-1);
ShiftInstance yesterdayInstance = GetShiftInstanceForDay(yesterday);
if (yesterdayInstance != null)
{
lastShift = yesterdayInstance.Shift;
}
// step through each day until done
while (thisDate.CompareTo(toDate) < 1)
{
if (lastShift != null && lastShift.SpansMidnight())
{
// check for days in the middle of the time period
bool lastDay = thisDate.CompareTo(toDate) == 0 ? true : false;
if (!lastDay || (lastDay && !toTime.Equals(LocalTime.Midnight)))
{
// add time after midnight in this day
int afterMidnightSecond = TimePeriod.SecondOfDay(lastShift.GetEnd());
int fromSecond = TimePeriod.SecondOfDay(thisTime);
if (afterMidnightSecond > fromSecond)
{
Duration seconds = Duration.FromSeconds(afterMidnightSecond - fromSecond);
sum = sum.Plus(seconds);
}
}
}
// today's shift
ShiftInstance instance = GetShiftInstanceForDay(thisDate);
Duration duration;
if (instance != null)
{
lastShift = instance.Shift;
// check for last date
if (thisDate.CompareTo(toDate) == 0)
{
duration = lastShift.CalculateWorkingTime(thisTime, toTime, true);
}
else
{
duration = lastShift.CalculateWorkingTime(thisTime, LocalTime.MaxValue, true);
}
sum = sum.Plus(duration);
}
else
{
lastShift = null;
}
int n = 1;
if (GetDayInRotation(thisDate) == dayCount)
{
// move ahead by the rotation count if possible
LocalDate rotationEndDate = thisDate.PlusDays(dayCount);
if (rotationEndDate.CompareTo(toDate) < 0)
{
n = dayCount;
sum = sum.Plus(Rotation.GetWorkingTime());
}
}
// move ahead n days starting at midnight
thisDate = thisDate.PlusDays(n);
thisTime = LocalTime.Midnight;
} // end day loop
return(sum);
}
internal ShiftInstance(Shift shift, LocalDateTime startDateTime, Team team)
{
this.Shift = shift;
this.StartDateTime = startDateTime;
this.Team = team;
}
