public void Register(IClockListner listner)
{
if (listner == null)
throw new ArgumentNullException("listner");
var cityInfo = listner.CityInfo;
if (cityInfo == null)
throw new ArgumentException("CityInfo is null");
_listners.Add(listner);
if (!_timeZoneServiceCache.ContainsKey(cityInfo.TimeZoneId))
{
var service = TimeZoneService.FindSystemTimeZoneById(cityInfo.TimeZoneId);
_timeZoneServiceCache.Add(cityInfo.TimeZoneId, service);
}
NotifyListner(listner);
}
public void UnRegister(IClockListner listner)
{
_listners.Remove(listner);
}
private void NotifyListner(IClockListner clockListner)
{
var service = GetTimeService(clockListner.CityInfo.TimeZoneId);
var date = CalculateTime(service);
clockListner.TickTack(date);
}
