/// <summary>
/// Initializes a new instance of the <see cref="LegacyAvailabilityTimeZone"/> class.
/// </summary>
/// <param name="timeZoneInfo">The time zone used to initialize this instance.</param>
LegacyAvailabilityTimeZone(TimeZoneInfo timeZoneInfo)
: this()
{
// Availability uses the opposite sign for the bias, e.g. if TimeZoneInfo.BaseUtcOffset = 480 than
// SerializedTimeZone.Bias must be -480.
this.bias = -timeZoneInfo.BaseUtcOffset;
// To convert TimeZoneInfo into SerializableTimeZone, we need two time changes: one to Standard
// time, the other to Daylight time. TimeZoneInfo holds a list of adjustment rules that represent
// the different rules that govern time changes over the years. We need to grab one of those rules
// to initialize this instance.
TimeZoneInfo.AdjustmentRule[] adjustmentRules = timeZoneInfo.GetAdjustmentRules();
if (adjustmentRules.Length == 0)
{
// If there are no adjustment rules (which is the case for UTC), we have to come up with two
// dummy time changes which both have a delta of zero and happen at two hard coded dates. This
// simulates a time zone in which there are no time changes.
this.daylightTime = new LegacyAvailabilityTimeZoneTime();
this.daylightTime.Delta = TimeSpan.Zero;
this.daylightTime.DayOrder = 1;
this.daylightTime.DayOfTheWeek = DayOfTheWeek.Sunday;
this.daylightTime.Month = 10;
this.daylightTime.TimeOfDay = TimeSpan.FromHours(2);
this.daylightTime.Year = 0;
this.standardTime = new LegacyAvailabilityTimeZoneTime();
this.standardTime.Delta = TimeSpan.Zero;
this.standardTime.DayOrder = 1;
this.standardTime.DayOfTheWeek = DayOfTheWeek.Sunday;
this.standardTime.Month = 3;
this.standardTime.TimeOfDay = TimeSpan.FromHours(2);
this.daylightTime.Year = 0;
}
else
{
// When there is at least one adjustment rule, we need to grab the last one which is the
// one that currently applies (TimeZoneInfo stores adjustment rules sorted from oldest to
// most recent).
TimeZoneInfo.AdjustmentRule currentRule = adjustmentRules[adjustmentRules.Length - 1];
this.standardTime = new LegacyAvailabilityTimeZoneTime(currentRule.DaylightTransitionEnd, TimeSpan.Zero);
// Again, TimeZoneInfo and SerializableTime use opposite signs for bias.
this.daylightTime = new LegacyAvailabilityTimeZoneTime(currentRule.DaylightTransitionStart, -currentRule.DaylightDelta);
}
}
bool TryReadElementFromXml(EwsServiceXmlReader reader)
{
switch (reader.LocalName)
{
case XmlElementNames.Bias:
this.bias = TimeSpan.FromMinutes(reader.ReadElementValue <int>());
return(true);
case XmlElementNames.StandardTime:
this.standardTime = new LegacyAvailabilityTimeZoneTime();
this.standardTime.LoadFromXml(reader, reader.LocalName);
return(true);
case XmlElementNames.DaylightTime:
this.daylightTime = new LegacyAvailabilityTimeZoneTime();
this.daylightTime.LoadFromXml(reader, reader.LocalName);
return(true);
default:
return(false);
}
}
