private Nth GetNth(string input)
{
if (string.IsNullOrEmpty(input))
{
return(null);
}
string ntype = input.ToLower().Replace("/", " ");
ntype = ntype.Replace("\\", " ");
ntype = ntype.Replace("+", " ");
ntype = ntype.Replace("n", " ");
ntype = ntype.Replace("x", " ");
ntype = ntype.Replace("(", " ");
ntype = ntype.Replace(")", " ");
int index = ntype.IndexOf(" ");
string begin = null;
string end = null;
if (index > -1)
{
begin = ntype.Substring(0, index);
end = ntype.Substring(index);
}
if (string.IsNullOrWhiteSpace(begin))
{
return(null);
}
Nth result = new Nth();
int beginint = 0;
if (!int.TryParse(begin.Trim(), out beginint))
{
return(null);
}
result.N = beginint;
int thint = 0;
if (!string.IsNullOrWhiteSpace(end))
{
int.TryParse(end.Trim(), out thint);
result.Th = thint;
}
return(result);
}
public override string GetDescription()
{
return("{0} {1} of the month".Fmt(Nth.ToOrdinalString(), ReferencedRule));
}
