public override bool TryParse(string value, out DateTime result, DateTime current)
{
result = current;
if (string.IsNullOrEmpty(value))
{
return(false);
}
var patternBuilder = new StringBuilder();
foreach (var special in SpecialNames.SpecialNamesSpecification.Keys)
{
patternBuilder.AppendFormat(@"|(?<{0}>(?<=\b|\W){0}(?=\b|\W))", special);
}
patternBuilder.Remove(0, 1); // Remove the first |.
var pattern = patternBuilder.ToString();
var regex = new Regex(pattern, RegexOptions.IgnoreCase);
var match = regex.Match(value);
result = DateParserBase.MergeDateAndTime(DateTime.Now, current);
if (match.Success)
{
var index = this.FindMatchingGroupIndex(match.Groups.Cast <Group>().Skip(1).ToList());
var specialName = regex.GroupNameFromNumber(index + 1);
result = result.AddDays(SpecialNames.SpecialNamesSpecification[specialName]);
return(true);
}
return(false);
}
public override bool TryParse(string value, out DateTime result, DateTime current)
{
result = current;
if (string.IsNullOrEmpty(value))
{
return(false);
}
var normalizedDate = this.NormalizeDateString(value, current);
var dateParts = normalizedDate.Split(new string[] { this.Separator }, StringSplitOptions.RemoveEmptyEntries);
bool r = false;
// TODO: Handle two parts separately.
////if (dateParts.Length == 2)
////{
//// dateParts.Add(current.Year.ToString());
////}
// NOTE: Handle one part.
if (dateParts.Length == 1)
{
result = current;
int n;
// We could have month or number.
// If it is a number it could be day or year.
// It is year only if cannot be a day.
if (int.TryParse(dateParts[0], out n))
{
var daysCount = this.DateTimeFormat.Calendar.GetDaysInMonth(current.Year, current.Month);
// Is it a valid day?
if (daysCount >= n && n > 0)
{
result = this.SetDay(current, n);
r = true;
}
else if (n >= 0 && n < DateTime.MaxValue.Year)
{
// Is it a valid year?
result = this.SetYear(current, n);
r = true;
}
// If not - give up - we cannot parse it!
}
else
{
bool isLetter = Char.IsLetter(dateParts[0].ToString(), dateParts[0].Length - 1);
if (isLetter)
{
// It is obviosly a month. We should find its number!
var abbrMonths = this.DateTimeFormat.AbbreviatedMonthNames;
var months = this.DateTimeFormat.MonthNames;
int i = 0;
for (i = 0; i < abbrMonths.Length - 1; i++)
{
if (abbrMonths[i].Equals(dateParts[0], StringComparison.CurrentCultureIgnoreCase) ||
months[i].Equals(dateParts[0], StringComparison.CurrentCultureIgnoreCase))
{
break;
}
}
result = this.SetMonth(current, i + 1);
r = true;
}
}
}
else
{
DateTime dt = result;
r = DateTime.TryParse(normalizedDate, this.DateTimeFormat, DateTimeStyles.None, out result);
if (!r)
{
result = current;
}
}
result = DateParserBase.MergeDateAndTime(result, current);
return(r);
}