public string GetFormattedDaylightSavingInfo(DaylightSavingInformation daylightSavingInfo, City city)
{
var formattedText = new StringBuilder();
if (daylightSavingInfo.NoDaylightSavings)
{
formattedText.AppendFormat("Daylight saving time is not observed in {0}.", city.FormattedName);
}
else if(daylightSavingInfo.IsCurrentDaylightSavingInfo)
{
if(daylightSavingInfo.IsInDaylightSavingsTime)
formattedText.AppendFormat("{0} is currently in daylight saving time. It started on {1} when clocks were put forward by {2} and will end on {3} when clocks will be put back by {4}.",
city.FormattedName,
daylightSavingInfo.Start.GetFormattedDateAndTime(),
daylightSavingInfo.FormattedStartDateSavingPutForwardInHours,
daylightSavingInfo.End.GetFormattedDateAndTime(),
daylightSavingInfo.FormattedEndDateSavingPutBackInHours);
else
formattedText.AppendFormat("{0} is currently not in daylight saving time. It ended on {1} when clocks were put back by {2} and will start again on {3} when clocks will be put forward by {4}.",
city.FormattedName,
daylightSavingInfo.End.GetFormattedDateAndTime(),
daylightSavingInfo.FormattedEndDateSavingPutBackInHours,
daylightSavingInfo.Start.GetFormattedDateAndTime(),
daylightSavingInfo.FormattedStartDateSavingPutForwardInHours);
}
else
{
var startOrStarted = "starts";
var willBeOrWasPutForward = "will be";
if (daylightSavingInfo.HasStarted)
{
startOrStarted = "started";
willBeOrWasPutForward = "were";
}
var endOrEnded = "will end";
var willBeOrWasPutBack = "will be";
if (daylightSavingInfo.HasEnded)
{
endOrEnded = "ended";
willBeOrWasPutBack = "were";
}
if(daylightSavingInfo.IsInDaylightSavingsTime)
{
formattedText.AppendFormat("Daylight saving time {0} in {1} on {2} when clocks {3} put forward by {4} and {5} on {6} when clocks {7} put back by {8}.",
startOrStarted,
city.FormattedName,
daylightSavingInfo.Start.GetFormattedDateAndTime(),
willBeOrWasPutBack,
daylightSavingInfo.FormattedEndDateSavingPutBackInHours,
endOrEnded,
daylightSavingInfo.End.GetFormattedDateAndTime(),
willBeOrWasPutForward,
daylightSavingInfo.FormattedEndDateSavingPutBackInHours);
}
else
{
formattedText.AppendFormat("Daylight saving time {0} in {1} on {2} when clocks {3} put back by {4} and {5} on {6} when clocks {7} put forward by {8}.",
endOrEnded,
city.FormattedName,
daylightSavingInfo.End.GetFormattedDateAndTime(),
willBeOrWasPutForward,
daylightSavingInfo.FormattedEndDateSavingPutBackInHours,
startOrStarted,
daylightSavingInfo.Start.GetFormattedDateAndTime(),
willBeOrWasPutBack,
daylightSavingInfo.FormattedEndDateSavingPutBackInHours);
}
}
return formattedText.ToString();
}
private DaylightSavingInformation GetDaylightSavingInfo(ZonedDateTime zonedDateTime)
{
if (zonedDateTime.GetZoneInterval().IsoLocalEnd.Year > 10000) return DaylightSavingInformation.CreateWithNoDaylightSavings();
var daylightSavingInfo = new DaylightSavingInformation { IsInDaylightSavingsTime = zonedDateTime.GetZoneInterval().Savings.Milliseconds > 0 };
if (daylightSavingInfo.IsInDaylightSavingsTime)
{
daylightSavingInfo.End = zonedDateTime.GetZoneInterval().IsoLocalEnd;
daylightSavingInfo.EndDateSavingPutBackInMilliseconds = zonedDateTime.GetZoneInterval().Savings.Milliseconds;
daylightSavingInfo.HasEnded = daylightSavingInfo.End.ToDateTimeUnspecified() < zonedDateTime.LocalDateTime.ToDateTimeUnspecified();
daylightSavingInfo.Start = zonedDateTime.GetZoneInterval().IsoLocalStart.Minus(Period.FromMilliseconds(zonedDateTime.GetZoneInterval().Savings.Milliseconds));
daylightSavingInfo.StartDateSavingPutForwardInMilliseconds = zonedDateTime.GetZoneInterval().Savings.Milliseconds;
daylightSavingInfo.HasStarted = daylightSavingInfo.Start.ToDateTimeUnspecified() < zonedDateTime.LocalDateTime.ToDateTimeUnspecified();
}
else
{
var previousZoneInterval = zonedDateTime.GetZoneInterval().Start.Minus(Duration.FromMilliseconds(1)).InZone(zonedDateTime.Zone).GetZoneInterval();
daylightSavingInfo.End = previousZoneInterval.IsoLocalEnd;
daylightSavingInfo.EndDateSavingPutBackInMilliseconds = previousZoneInterval.Savings.Milliseconds;
daylightSavingInfo.HasEnded = daylightSavingInfo.End.ToDateTimeUnspecified() < zonedDateTime.LocalDateTime.ToDateTimeUnspecified();
if (!daylightSavingInfo.NoDaylightSavings)
{
var nextZoneInterval = zonedDateTime.GetZoneInterval().End.Plus(Duration.FromMilliseconds(1)).InZone(zonedDateTime.Zone).GetZoneInterval();
daylightSavingInfo.Start = nextZoneInterval.IsoLocalStart.Minus(Period.FromMilliseconds(nextZoneInterval.Savings.Milliseconds));
daylightSavingInfo.StartDateSavingPutForwardInMilliseconds = nextZoneInterval.Savings.Milliseconds;
daylightSavingInfo.HasStarted = daylightSavingInfo.Start.ToDateTimeUnspecified() < zonedDateTime.LocalDateTime.ToDateTimeUnspecified();
}
}
return daylightSavingInfo;
}
