public static bool TryParse(string s, out RodneCislo result)
{
try {
result = RodneCislo.Parse(s);
return(true);
} catch (Exception e) when(e is FormatException || e is ArgumentException)
{
result = null;
return(false);
}
}
public static RodneCislo Parse(string s)
{
if (s == null)
{
throw new ArgumentNullException(nameof(s));
}
if (string.IsNullOrWhiteSpace(s))
{
throw new ArgumentException("Value cannot be empty or whitespace only string.", nameof(s));
}
// Remove everything except decimal numbers
s = Regex.Replace(s, @"[^0-9]", string.Empty);
if (s.Length < 9 || s.Length > 10)
{
throw new FormatException("Value must contain 9 or 10 decimal numbers");
}
// Create return value
var r = new RodneCislo {
rawValue = s
};
// Parse year
var year = int.Parse(s.Substring(0, 2));
if (s.Length == 9)
{
year += year < 54 ? 1900 : 1800;
}
else
{
year += year < 54 ? 2000 : 1900;
}
// Parse month
var month = int.Parse(s.Substring(2, 2));
if (month >= 1 && month <= 12)
{
r.Gender = Gender.Male;
r.IsExtraSequence = false; // first sequence
}
else if (month >= 51 && month <= 62)
{
r.Gender = Gender.Female;
r.IsExtraSequence = false; // first sequence
month -= 50;
}
else if (month >= 21 && month <= 32)
{
r.Gender = Gender.Male;
r.IsExtraSequence = true; // second sequence
month -= 20;
}
else if (month >= 71 && month <= 82)
{
r.Gender = Gender.Female;
r.IsExtraSequence = true; // second sequence
month -= 70;
}
else
{
throw new FormatException("Value contains invalid month.");
}
// Parse date
try {
r.BirthDate = new DateTime(year, month, int.Parse(s.Substring(4, 2)));
} catch (ArgumentOutOfRangeException) {
throw new FormatException("Value contains invalid date.");
}
// Sequence number
r.SequenceNumber = int.Parse(s.Substring(6, 3));
// Checksum
return(year >= 1954 && long.Parse(s) % 11 > 0 ? throw new FormatException("Value contains invalid checksum") : r);
}