private ArchiveDatePoint ParsePoint(string text, bool dmy,
DateMonthStyle monthStyle)
{
// senza data or s.d.
if (_sineDataRegex.IsMatch(text))
{
return(null);
}
// century
if (text.IndexOf("secolo", StringComparison.OrdinalIgnoreCase) > -1 ||
text.IndexOf("sec.", StringComparison.CurrentCultureIgnoreCase) > -1)
{
return(ParseCenturyPoint(text));
}
// decade
Match match = _decadeRegex.Match(text);
if (match.Success)
{
return(ParseDecade(match.Groups[1].Value));
}
// DMY/YMD
ArchiveDatePoint point = new ArchiveDatePoint();
// about
if (_aboutRegex.IsMatch(text))
{
point.Approximation = ApproximationType.About;
}
int i = (int)(monthStyle == 0 ? 0 : monthStyle - 1);
Regex r = dmy ? _dmyRegexes[i] : _ymdRegexes[i];
match = r.Match(text);
if (!match.Success)
{
return(null);
}
YmdToken y = YmdToken.Parse(match.Groups["y"].Value, 'y');
YmdToken m = YmdToken.Parse(match.Groups["m"].Value, 'm');
YmdToken d = YmdToken.Parse(match.Groups["d"].Value, 'd');
// take square brackets into account: this depends on the DMY/YMD order
MarkInferred(dmy ? new[] { d, m, y } : new[] { y, m, d });
point.Value = y.Value;
point.IsYearInferred = y.IsInferred;
if (m != null)
{
point.Month = m.Value;
point.IsMonthInferred = m.IsInferred;
}
if (d != null)
{
point.Day = d.Value;
point.IsDayInferred = d.IsInferred;
}
return(point);
}
private void AdjustDmyForShortenedRange(Tuple <string, string> input,
ArchiveDate date, DateMonthStyle monthStyle)
{
if (date.A != null || date.B?.ValueType != DateValueType.Year ||
date.B.Month == 0)
{
return;
}
int i = (int)(monthStyle == 0 ? 0 : monthStyle - 1);
Match match = _shortenedDmyRegexes[i].Match(input.Item1);
if (match.Success)
{
// copy YM from Max
date.A = new ArchiveDatePoint
{
ValueType = DateValueType.Year,
Value = date.B.Value,
IsYearInferred = date.B.IsYearInferred,
Month = date.B.Month,
IsMonthInferred = date.B.IsMonthInferred
};
// style N has groups d/m or md
if (i == 0)
{
if (match.Groups["md"].Length > 0)
{
if (date.B.Day > 0)
{
date.A.Day = short.Parse(match.Groups["md"].Value,
CultureInfo.InvariantCulture);
}
else
{
date.A.Month = short.Parse(match.Groups["md"].Value,
CultureInfo.InvariantCulture);
}
}
else
{
date.A.Month = short.Parse(match.Groups["m"].Value,
CultureInfo.InvariantCulture);
date.A.Day = short.Parse(match.Groups["d"].Value,
CultureInfo.InvariantCulture);
}
} // N
else
{
// styles S/F have groups m/d
if (match.Groups["m"].Length > 0)
{
YmdToken m = YmdToken.Parse(match.Groups["m"].Value, 'm');
date.A.Month = m.Value;
}
if (match.Groups["d"].Length > 0)
{
YmdToken d = YmdToken.Parse(match.Groups["d"].Value, 'd');
date.A.Day = d.Value;
}
} // !N
}
}
/// <summary>
/// Parses the specified text representing an YMD token, eventually
/// surrounded by an opening and/or closing square bracket.
/// </summary>
/// <param name="text">The text.</param>
/// <param name="type">The type of token to parse: <c>y</c>, <c>m</c>,
/// <c>d</c>.</param>
/// <returns>parsed token or null if invalid</returns>
/// <exception cref="ArgumentNullException">null text</exception>
public static YmdToken Parse(string text, char type)
{
if (text == null)
{
throw new ArgumentNullException(nameof(text));
}
text = text.Trim().ToLowerInvariant();
Match m = _bracketedRegex.Match(text);
if (!m.Success)
{
return(null);
}
YmdToken token = new YmdToken {
Type = type
};
if (m.Groups["l"].Length > 0)
{
token.HasLeftBracket = true;
}
if (m.Groups["r"].Length > 0)
{
token.HasRightBracket = true;
}
string sValue = m.Groups["v"].Value.ToLowerInvariant();
switch (char.ToLowerInvariant(type))
{
case 'y':
token.Value = short.Parse(sValue, CultureInfo.InvariantCulture);
break;
case 'm':
if (sValue.Any(char.IsLetter))
{
short n = GetValueFromFullMonth(sValue);
if (n > 0)
{
token.Value = n;
}
else
{
string s = sValue.EndsWith(".", StringComparison.Ordinal)
? sValue
: sValue + ".";
n = GetValueFromShortMonth(s);
if (n > 0)
{
token.Value = n;
}
}
}
else
{
token.Value = short.Parse(sValue, CultureInfo.InvariantCulture);
}
break;
case 'd':
goto case 'y';
}
return(token);
}