public string GetInterval(DateTime start, DateTime end,
IntervalEdge startEdge, IntervalEdge endEdge, TimeSpan duration)
{
if (end < start)
{
throw new ArgumentOutOfRangeException("end");
}
StringBuilder sb = new StringBuilder();
// interval start
switch (startEdge)
{
case IntervalEdge.Closed:
sb.Append(IntervalStartClosed);
break;
case IntervalEdge.Open:
sb.Append(UseIsoIntervalNotation ? IntervalStartOpenIso : IntervalStartOpen);
break;
}
bool addDuration = true;
bool startHasTimeOfDay = TimeTool.HasTimeOfDay(start);
// no duration - schow start date (optionally with the time part)
if (duration == TimeSpec.MinPeriodDuration)
{
sb.Append(startHasTimeOfDay ? GetDateTime(start) : GetShortDate(start));
addDuration = false;
}
// within one day: show full start, end time and suration
else if (TimeCompare.IsSameDay(start, end))
{
sb.Append(GetDateTime(start));
sb.Append(StartEndSeparator);
sb.Append(GetLongTime(end));
}
else
{
bool endHasTimeOfDay = TimeTool.HasTimeOfDay(start);
bool hasTimeOfDays = startHasTimeOfDay || endHasTimeOfDay;
if (hasTimeOfDays)
{
sb.Append(GetDateTime(start));
sb.Append(StartEndSeparator);
sb.Append(GetDateTime(end));
}
else
{
sb.Append(GetShortDate(start));
sb.Append(StartEndSeparator);
sb.Append(GetShortDate(end));
}
}
// interval end
switch (endEdge)
{
case IntervalEdge.Closed:
sb.Append(IntervalEndClosed);
break;
case IntervalEdge.Open:
sb.Append(UseIsoIntervalNotation ? IntervalEndOpenIso : IntervalEndOpen);
break;
}
// duration
if (addDuration)
{
sb.Append(DurationSeparator);
sb.Append(GetDuration(duration));
}
return(sb.ToString());
}