public Period ParseDates()
{
string startDatePattern = @"[cс]\s(\d{1,2}\s\S+\s\d{4})";
string endDatePattern = @"до\s(\d{1,2}\s\S+\s\d{4})";
DateTime?enddate = null;
DateTime?startdate = null;
// 1. parse End Date
Match me = new Regex(endDatePattern, RegexOptions.IgnoreCase).Match(input);
if (me.Success && DateTime.TryParseExact(me.Groups[1].Value, DateFormats, RuCulture, DateTimeStyles.None, out DateTime outdate))
{
enddate = outdate.ChangeTime(23, 59, 59, 0);
}
else
{
ParseError?.Invoke(this, "Cannot parse end date: " + me.Groups[1].Value);
}
Match ms = new Regex(startDatePattern, RegexOptions.IgnoreCase).Match(input);
if (ms.Success && DateTime.TryParseExact(ms.Groups[1].Value, DateFormats, RuCulture, DateTimeStyles.None, out DateTime dt))
{
startdate = dt;
}
else
{
ParseError?.Invoke(this, "Cannot parse start date: " + ms.Groups[1].Value);
}
if ((startdate == null) && (enddate != null))
{
startdate = DateTime.Today;
}
return(new Period()
{
StartDate = startdate, EndDate = enddate
});
}