public virtual ICalendarComponent Build(string objectName)
{
ICalendarComponent c;
var name = objectName.ToUpper();
switch (name)
{
case Components.Alarm:
c = new Alarm();
break;
case EventStatus.Name:
c = new CalendarEvent();
break;
case Components.Freebusy:
c = new FreeBusy();
break;
case JournalStatus.Name:
c = new Journal();
break;
case Components.Timezone:
c = new VTimeZone();
break;
case TodoStatus.Name:
c = new Todo();
break;
case Components.Calendar:
c = new Calendar();
break;
case Components.Daylight:
case Components.Standard:
c = new VTimeZoneInfo();
break;
default:
c = new CalendarComponent();
break;
}
c.Name = name;
return(c);
}
private static void PopulateTimeZoneInfoRecurrenceDates(VTimeZoneInfo tzi, List <ZoneInterval> intervals, TimeSpan delta)
{
foreach (var interval in intervals)
{
var periodList = new PeriodList();
var time = interval.IsoLocalStart.ToDateTimeUnspecified();
var date = new CalDateTime(time).Add(delta) as CalDateTime;
if (date == null)
{
continue;
}
date.HasTime = true;
periodList.Add(date);
tzi.RecurrenceDates.Add(periodList);
}
}
private static void PopulateTimeZoneInfoRecurrenceRules(VTimeZoneInfo tzi, ZoneInterval interval)
{
var recurrence = new IntervalRecurrencePattern(interval);
tzi.RecurrenceRules.Add(recurrence);
}
private static VTimeZoneInfo CreateTimeZoneInfo(List <ZoneInterval> matchedIntervals, List <ZoneInterval> intervals, bool isRRule = true,
bool isOnlyInterval = false, bool isDaylight = false)
{
if (matchedIntervals == null || !matchedIntervals.Any())
{
throw new ArgumentException("No intervals found in matchedIntervals");
}
var oldestInterval = matchedIntervals.OrderBy(x => x.Start).FirstOrDefault();
if (oldestInterval == null)
{
throw new InvalidOperationException("oldestInterval was not found");
}
var previousInterval = intervals.SingleOrDefault(x => (x.HasEnd ? x.End : Instant.MaxValue) == oldestInterval.Start);
var delta = new TimeSpan(1, 0, 0);
if (previousInterval != null)
{
delta = (previousInterval.WallOffset - oldestInterval.WallOffset).ToTimeSpan();
}
else if (isOnlyInterval)
{
delta = new TimeSpan();
}
var utcOffset = oldestInterval.StandardOffset.ToTimeSpan();
var timeZoneInfo = new VTimeZoneInfo();
if (isDaylight)
{
timeZoneInfo.Name = "DAYLIGHT";
timeZoneInfo.OffsetFrom = new UtcOffset(utcOffset);
timeZoneInfo.OffsetTo = new UtcOffset(utcOffset - delta);
}
else
{
timeZoneInfo.Name = "STANDARD";
timeZoneInfo.OffsetFrom = new UtcOffset(utcOffset + delta);
timeZoneInfo.OffsetTo = new UtcOffset(utcOffset);
}
// timeZoneInfo.TimeZoneName = oldestInterval.Name;
var start = oldestInterval.IsoLocalStart.ToDateTimeUnspecified() + delta;
timeZoneInfo.Start = new CalDateTime(start)
{
HasTime = true
};
if (isRRule)
{
PopulateTimeZoneInfoRecurrenceRules(timeZoneInfo, oldestInterval);
}
// fixing the case that outlook 2010 cannot process the timezone with RDate
// reference https://support.microsoft.com/en-hk/help/4456241/you-receive-a-meeting-request-that-has-not-supported-calendar-message
else if (!isOnlyInterval)
{
PopulateTimeZoneInfoRecurrenceDates(timeZoneInfo, matchedIntervals, delta);
}
return(timeZoneInfo);
}
private static VTimeZoneInfo CreateTimeZoneInfo(List <ZoneInterval> matchedIntervals, List <ZoneInterval> intervals, bool isRRule = true,
bool isOnlyInterval = false)
{
if (matchedIntervals == null || !matchedIntervals.Any())
{
throw new ArgumentException("No intervals found in matchedIntervals");
}
var oldestInterval = matchedIntervals.OrderBy(x => x.Start).FirstOrDefault();
if (oldestInterval == null)
{
throw new InvalidOperationException("oldestInterval was not found");
}
var previousInterval = intervals.SingleOrDefault(x => (x.HasEnd ? x.End : Instant.MaxValue) == oldestInterval.Start);
var delta = new TimeSpan(1, 0, 0);
if (previousInterval != null)
{
delta = new TimeSpan(0, 0, previousInterval.WallOffset.Seconds - oldestInterval.WallOffset.Seconds);
}
else if (isOnlyInterval)
{
delta = new TimeSpan();
}
var utcOffset = oldestInterval.StandardOffset.ToTimeSpan();
var timeZoneInfo = new VTimeZoneInfo();
var isDaylight = oldestInterval.Savings.Ticks > 0;
if (isDaylight)
{
timeZoneInfo.Name = Components.Daylight;
timeZoneInfo.OffsetFrom = new UtcOffset(utcOffset);
timeZoneInfo.OffsetTo = new UtcOffset(utcOffset - delta);
}
else
{
timeZoneInfo.Name = Components.Standard;
timeZoneInfo.OffsetFrom = new UtcOffset(utcOffset + delta);
timeZoneInfo.OffsetTo = new UtcOffset(utcOffset);
}
timeZoneInfo.TimeZoneName = oldestInterval.Name;
var start = oldestInterval.IsoLocalStart.ToDateTimeUnspecified() + delta;
timeZoneInfo.Start = new CalDateTime(start)
{
HasTime = true
};
if (isRRule)
{
PopulateTimeZoneInfoRecurrenceRules(timeZoneInfo, oldestInterval);
}
else
{
PopulateTimeZoneInfoRecurrenceDates(timeZoneInfo, matchedIntervals, delta);
}
return(timeZoneInfo);
}