public static bool CanCollapse(AbstractPeriod basePeriod, AbstractPeriod coverPeriod)
{
if ((basePeriod.Fixed & coverPeriod.Fixed) != 0)
{
return(false);
}
return(basePeriod.SpanDirection != -coverPeriod.SpanDirection || basePeriod.SpanDirection == 0);
}
public static bool CollapseTwo(AbstractPeriod basePeriod, AbstractPeriod coverPeriod, bool isLinked)
{
if (!CanCollapse(basePeriod, coverPeriod))
{
return(false);
}
// if span
if (basePeriod.SpanDirection != 0)
{
if (coverPeriod.SpanDirection != 0)
{
// if another date is Span, just add spans together
basePeriod.Span += coverPeriod.Span;
}
}
// take year if it is not here, but is in other date
if (!basePeriod.IsFixed(FixPeriod.Year) && coverPeriod.IsFixed(FixPeriod.Year))
{
basePeriod.Date = new DateTime(coverPeriod.Date.Year, basePeriod.Date.Month, basePeriod.Date.Day);
basePeriod.Fix(FixPeriod.Year);
}
// take month if it is not here, but is in other date
if (!basePeriod.IsFixed(FixPeriod.Month) && coverPeriod.IsFixed(FixPeriod.Month))
{
basePeriod.Date = new DateTime(basePeriod.Date.Year, coverPeriod.Date.Month, basePeriod.Date.Day);
basePeriod.Fix(FixPeriod.Month);
}
// week and day
if (!basePeriod.IsFixed(FixPeriod.Week) && coverPeriod.IsFixed(FixPeriod.Week))
{
// the week is in another date, check where is a day
if (basePeriod.IsFixed(FixPeriod.Day))
{
// set day of week, take date
basePeriod.Date = TakeDayOfWeekFrom(coverPeriod.Date, basePeriod.Date);
basePeriod.Fix(FixPeriod.Week);
}
else if (!coverPeriod.IsFixed(FixPeriod.Day))
{
// only week here, take it by taking a day
basePeriod.Date = new DateTime(basePeriod.Date.Year, basePeriod.Date.Month, coverPeriod.Date.Day);
basePeriod.Fix(FixPeriod.Week);
}
}
else if (basePeriod.IsFixed(FixPeriod.Week) && coverPeriod.IsFixed(FixPeriod.Day))
{
// here is a week, but day of week in other date
basePeriod.Date = TakeDayOfWeekFrom(basePeriod.Date, coverPeriod.Date);
basePeriod.Fix(FixPeriod.Week, FixPeriod.Day);
}
// day
if (!basePeriod.IsFixed(FixPeriod.Day) && coverPeriod.IsFixed(FixPeriod.Day))
{
if (coverPeriod.FixDayOfWeek)
{
// take only day of week from cover
basePeriod.Date = TakeDayOfWeekFrom(
new DateTime(
basePeriod.Date.Year, basePeriod.Date.Month,
basePeriod.IsFixed(FixPeriod.Week) ? basePeriod.Date.Day : 1
),
coverPeriod.Date,
!basePeriod.IsFixed(FixPeriod.Week)
);
basePeriod.Fix(FixPeriod.Week, FixPeriod.Day);
}
else
{
// take day from cover
basePeriod.Date = new DateTime(basePeriod.Date.Year, basePeriod.Date.Month, coverPeriod.Date.Day);
basePeriod.Fix(FixPeriod.Week, FixPeriod.Day);
}
}
// time
var timeGot = false;
if (!basePeriod.IsFixed(FixPeriod.Time) && coverPeriod.IsFixed(FixPeriod.Time))
{
basePeriod.Fix(FixPeriod.Time);
if (!basePeriod.IsFixed(FixPeriod.TimeUncertain))
{
basePeriod.Time = coverPeriod.Time;
}
else
{
if (basePeriod.Time.Hours <= 12 && coverPeriod.Time.Hours > 12)
{
// first period is uncertain and second is certain
if (!isLinked)
{
// add 12 hours if these to periods are NOT part of 'from-two' chain
basePeriod.Time += new TimeSpan(12, 0, 0);
}
}
}
timeGot = true;
}
if (!basePeriod.IsFixed(FixPeriod.TimeUncertain) && coverPeriod.IsFixed(FixPeriod.TimeUncertain))
{
basePeriod.Fix(FixPeriod.TimeUncertain);
if (basePeriod.IsFixed(FixPeriod.Time))
{
// take time from cover, but day part from base
var offset = coverPeriod.Time.Hours <= 12 && basePeriod.Time.Hours > 12 ? 12 : 0;
basePeriod.Time = new TimeSpan(coverPeriod.Time.Hours + offset, coverPeriod.Time.Minutes, 0);
}
else
{
basePeriod.Time = coverPeriod.Time;
timeGot = true;
}
}
// if this date is Span and we just got time from another non-span date, add this time to Span
if (timeGot && basePeriod.SpanDirection != 0 && coverPeriod.SpanDirection == 0)
{
basePeriod.Span += basePeriod.SpanDirection == 1 ? basePeriod.Time : -basePeriod.Time;
}
// set tokens edges
basePeriod.Start = Math.Min(basePeriod.Start, coverPeriod.Start);
basePeriod.End = Math.Max(basePeriod.End, coverPeriod.End);
return(true);
}