/// <summary>
/// Attempts to parse a UTC offset.
/// </summary>
/// <param name="input">The string to parse.</param>
/// <param name="offset">The offset that was parsed if parsing was successful.</param>
/// <returns>Whether or not parsing was successful.</returns>
public static bool TryParseOffset(string input, out Offset offset)
{
var parseResult = OffsetPattern.GeneralInvariantWithZ.Parse(input);
if (parseResult.Success)
{
offset = parseResult.Value;
return(true);
}
parseResult = NoSignPattern.Parse(input);
if (parseResult.Success)
{
offset = parseResult.Value;
return(true);
}
parseResult = NoTimeSeparatorPattern.Parse(input);
if (parseResult.Success)
{
offset = parseResult.Value;
return(true);
}
offset = default;
return(false);
}
/// <inheritdoc />
public override object ConvertFromString(string text, IReaderRow row, MemberMapData memberMapData)
{
if (text == null)
{
// ReSharper disable once ExpressionIsAlwaysNull - throws an error
return(base.ConvertFromString(text, row, memberMapData));
}
return(OffsetPattern.Parse(text).Value);
}
static ZonedDateTime Parse(string text)
{
int gmtIndex = text.IndexOf(" GMT");
int zoneIndex = text.IndexOf(" (");
// TODO: Validation that these aren't -1 :)
string localText = text.Substring(0, gmtIndex);
string offsetText = text.Substring(gmtIndex, zoneIndex - gmtIndex);
var localResult = LocalPattern.Parse(localText);
var offsetResult = OffsetPattern.Parse(offsetText);
// TODO: Validate that both are successful
var fixedZone = DateTimeZone.ForOffset(offsetResult.Value);
return(localResult.Value.InZoneStrictly(fixedZone));
}