/// <summary>
/// Converts the value of the current <see cref="SwedishPersonalIdentityNumber" /> object to its equivalent short string representation.
/// Format is YYMMDDXSSSC, for example <example>990807-2391</example> or <example>120211+9986</example>.
/// </summary>
/// <param name="date">The date to decide wheter the person is older than 100 years. That decides the delimiter (- or +).</param>
public string ToShortString(DateTime date)
{
var dateOfBirth = SwedishPersonalIdentityNumberDateCalculations.GetDateOfBirth(Year, Month, Day);
var age = SwedishPersonalIdentityNumberDateCalculations.GetAge(dateOfBirth, date);
var delimiter = age >= 100 ? '+' : '-';
var twoDigitYear = Year % 100;
return($"{twoDigitYear:D2}{Month:D2}{Day:D2}{delimiter}{SerialNumber:D3}{Checksum}");
}
/// <summary>
/// Date of birth for the person according to the personal identity number.
/// Not always the actual date of birth due to lmitied amount of personal identity numbers per day.
/// </summary>
public static DateTime GetDateOfBirthHint(this SwedishPersonalIdentityNumber personalIdentityNumber)
{
return(SwedishPersonalIdentityNumberDateCalculations.GetDateOfBirth(personalIdentityNumber.Year, personalIdentityNumber.Month, personalIdentityNumber.Day));
}