public Answer GetAnswer(Question question)
{
var cityToken = question.GetToken<CityToken>();
var dateToken = question.GetToken<DateToken>();
int? year = null;
if (dateToken != null) year = dateToken.Year;
DaylightSavingInformation daylightSavingInfo;
if (year.HasValue)
{
var firstDateInTheYear = new LocalDateTime(year.Value, 1, 1, 0, 0).InZone(DateTimeZoneProviders.Tzdb[cityToken.City.Timezone], Resolvers.LenientResolver);
var firstZoneIntervalInTheYear = firstDateInTheYear.GetZoneInterval();
if (firstZoneIntervalInTheYear.IsoLocalEnd.Year > 10000) {
daylightSavingInfo = DaylightSavingInformation.CreateWithNoDaylightSavings();
}
else
{
var firstDateInTheNextZoneInterval = firstDateInTheYear.Plus(firstZoneIntervalInTheYear.Duration).Plus(Duration.FromMilliseconds(1));
daylightSavingInfo = GetDaylightSavingInfo(firstDateInTheNextZoneInterval);
}
}
else
{
daylightSavingInfo = GetDaylightSavingInfo(cityToken.GetCurrentTime());
}
var answerText = GetFormattedDaylightSavingInfo(daylightSavingInfo, cityToken.City);
return new Answer(question, true, true, answerText);
}