public TimeZoneInfo GetUserTimeZone(UserEntity user)
{
TimeZoneInfo timeZoneInfo = null;
if (_systemSettings.AllowUsersToSetTimeZone)
{
var timeZoneId = string.Empty;
if (user != null)
{
timeZoneId = _userAttributeService.GetValue(user, UserAttribute.TimeZoneId, "", false, true);
}
if (PatternValidator.IsValidTimeZoneId(timeZoneId))
{
timeZoneInfo = FindTimeZoneById(timeZoneId);
}
}
return(timeZoneInfo ?? DefaultTimeZone);
}
public static IChainableConstraint <IStringConstraints> IsTimeZoneId(this IStringConstraints constraints, bool ignoreEmpty = true)
{
return(constraints.Satisfy(v => (ignoreEmpty && string.IsNullOrEmpty(v)) || PatternValidator.IsValidTimeZoneId(v)));
}