/// <summary>
///
/// </summary>
/// <param name="otherNext"></param>
/// <param name="merged"></param>
/// <returns>Success:
/// False: there was a failure and parsing should fail.
/// True && merged == null: did not merge, but continue on.
/// True && merged != null: did merge, continue on.</returns>
public bool TryMerge(ParserToken otherNext, out ParserToken merged)
{
if (otherNext == null)
{
merged = null;
return(false); // shouldn't happen?
}
var otherUnits = otherNext.BestGuessUnits();
if (otherUnits == Units.None || otherUnits == Units.ErrorTooManyUnits) // && options.FailOnUnitlessNumber
//Console.WriteLine("error thing");
{
merged = null;
return(false);
}
var otherTimeSpan = otherNext.ToTimeSpan();
if (IsInitialNegative())
{
otherTimeSpan = -otherNext.ToTimeSpan();
}
if (options.StrictBigToSmall)
{
var smallestUnit = SmallestUnit();
//Console.WriteLine($"combining: {ToTimeSpan()?.ToString() ?? "null"} ({smallestUnit}) & {otherNext.ToTimeSpan()?.ToString() ?? "null"} ({otherUnits})");
if (otherUnits.IsTimeUnit() && smallestUnit.IsTimeUnit() && otherUnits > smallestUnit)
{
var newTokenWithSmallest = new TimeSpanToken();
newTokenWithSmallest.options = options;
newTokenWithSmallest.timespan = this.ToTimeSpan() + otherTimeSpan;
newTokenWithSmallest.smallest = otherNext.SmallestUnit();
newTokenWithSmallest.GivenUnit = BestGuessUnits(); // shouldn't matter
newTokenWithSmallest.initialNegative = IsInitialNegative();
merged = newTokenWithSmallest;
return(true);
}
merged = null;
return(true);
}
var newToken = new TimeSpanToken();
newToken.options = options;
newToken.timespan = this.ToTimeSpan() + otherTimeSpan;
newToken.initialNegative = IsInitialNegative();
//newToken.smallest = otherNext.SmallestUnit(); // shouldn't matter because not StrictBigToSmall
//newToken.GivenUnit = BestGuessUnits(); // shouldn't matter
merged = newToken;
return(true);
}
protected static bool DoParseMutliple(string text, out TimeSpan[] timeSpans, TimeSpanParserOptions options = null, int max = int.MaxValue)
{
if (options == null)
{
options = new TimeSpanParserOptions(); //TODO: default options object
}
Units[] badDefaults = new Units[] { Units.Error, Units.ErrorTooManyUnits, Units.ErrorAmbiguous };
if (badDefaults.Any(bad => options.UncolonedDefault == bad) || badDefaults.Any(bad => options.ColonedDefault == bad))
{
throw new ArgumentException("Bad default selection.");
}
//TODO (or not: overly limited: requires groups of 3 numbers or fails): https://social.msdn.microsoft.com/Forums/en-US/431d51f9-8003-4c72-ba1f-e830c6ad75ba/regex-to-match-all-number-formats-used-around-the-world?forum=regexp
text = text.Normalize(NormalizationForm.FormKC); // fixing any fullwidth characters
text = text.Replace('_', ' ');
var numberFormatInfo = (options.FormatProvider == null)
? CultureInfo.CurrentCulture.NumberFormat
: NumberFormatInfo.GetInstance(options.FormatProvider);
string decimalSeparator = numberFormatInfo.NumberDecimalSeparator;
bool allowThousands = ((options.NumberStyles & NumberStyles.AllowThousands) > 0);
string groupSeparator = allowThousands ?
Regex.Escape(numberFormatInfo.NumberGroupSeparator) : string.Empty;
string plusMinus = numberFormatInfo.PositiveSign + numberFormatInfo.NegativeSign; // TODO?
if (options.AllowDotSeparatedDayHours && decimalSeparator != ".")
{
decimalSeparator += "."; // always also need a dot for day.hour separation (unless that's off)
}
string zeroRegexStr = @"([+-]?:)?(([-+]?[0" + groupSeparator + "]*[" + Regex.Escape(decimalSeparator) + @"}]?[0]+(?:[eE][-+]?[0-9]+)?)\:?)+"; // 0:00:00 0e100 0.00:00:00:0.000:0e20:00
string numberRegexStr;
//TODO: +- at start or end depending on culture
if (allowThousands)
{
numberRegexStr = @"([+-]?:)?(([-+]?([0-9]+([" + groupSeparator + "]?)(?=[0-9]))*[" + Regex.Escape(decimalSeparator) + @"}]?[0-9]+(?:[eE][-+]?[0-9]+)?)\:?)+";
}
else
{
numberRegexStr = @"([+-]?:)?(([-+]?[0-9]*[" + Regex.Escape(decimalSeparator) + @"}]?[0-9]+(?:[eE][-+]?[0-9]+)?)\:?)+";
}
// regex notes:
// - floating point numbers separated by (or ending with) with colon.
// - matches a number: 30
// - also matches floating point number: +3e-10
// - also allows colons: 10:20:21.70
// - or crazy combo: 10.2e+2:20:21.70 (note: the dot is sometimes a day separator)
// - regex101.com for testing
// weird things:
// - supports mixed formats like "22:11h 10s" (=22:11:10)
// may change:
// - starting colon will be ignored, ":30" treated as "30"
// - but not after: 3: (treated as "3")
// - in future, starting-colon numbers may get their own option
var numberRegex = new Regex(numberRegexStr); // TODO: re-use regex + RegexOptions.Compiled
var zeroRegex = new Regex(zeroRegexStr);
List <ParserToken> tokens = new List <ParserToken>();
var matches = numberRegex.Matches(text);
for (int i = 0; i < matches.Count; i++) // foreach (Match match in matches) {
{
Match match = matches[i];
int numberEnd = match.Index + match.Length;
int nextMatchIndex = (i + 1 < matches.Count ? matches[i + 1].Index : text.Length);
int suffixLength = nextMatchIndex - numberEnd;
//Console.WriteLine($"text:{text}. match[{i}]: suffixLength:{suffixLength}");
string number = match.Value;
string suffix = text.Substring(numberEnd, suffixLength);
bool coloned = number.Contains(':');
//Console.WriteLine($"part[{i}]: num:'{number}', suffix:'{suffix}', colon:{coloned}");
Units suffixUnits = ParseSuffix(suffix);
//TODO: ignore initial colon (now) if requested
if (coloned)
{
var parts = number.Split(':');
if (parts.Length <= 1)
{
timeSpans = null; // timeSpans = builder.FinalSpans(); // foundTimeSpans.ToArray();
return(false); // something went wrong. should never happen
}
var token = new ColonedToken();
token.options = options;
token.GivenUnit = suffixUnits;
//TODO: maybe don't do this if parsing a localization that doesn't use a dot separator for days.months ?
if (parts != null && parts.Length >= 1 && parts[0].Contains('.'))
{
token.firstColumnContainsDot = true; //Note: specifically '.' and NOT the regional decimal separator
token.firstColumnRightHalf = ParseNumber(parts[0].Split('.')[1], options); //TODO: error checking
}
if (string.IsNullOrWhiteSpace(parts[0]))
{
// TODO
token.startsWithColon = true;
parts[0] = null;
}
else if (parts != null && parts.Length >= 1 && parts[0] != null && parts[0].Trim() == "-")
{
//don't attempt to parse
parts[0] = null;
token.negativeColoned = true;
token.startsWithColon = true;
}
else if (parts != null && parts.Length >= 1 && parts[0] != null && parts[0].Trim() == "+") //TODO tidy
{
parts[0] = null;
token.startsWithColon = true;
}
token.colonedColumns = parts.Select(p => ParseNumber(p, options)).ToArray();
tokens.Add(token);
//Console.WriteLine($"token: {token}");
}
else
{
//decimal parsedNumber;
//bool numberSuccess = decimal.TryParse(number, options.NumberStyles, options.FormatProvider, out parsedNumber);
var token = new OneUnitToken();
token.options = options;
token.GivenUnit = suffixUnits;
token.uncolonedValue = ParseNumber(number, options);
tokens.Add(token);
//Console.WriteLine($"token= {token}");
}
}
List <TimeSpan?> timespans = new List <TimeSpan?>();
ParserToken last = null;
bool willSucceed = true;
foreach (ParserToken token in tokens)
{
if (token.IsUnitlessFailure() || token.IsOtherFailure())
{
//Console.WriteLine($"wont succeed..." + (!options.FailOnUnitlessNumber ? "or actually it might" : ""));
//throw new ArgumentException("failed to parse because of a unitless number.");
willSucceed = false;
if (last != null)
{
timespans.Add(last.ToTimeSpan());
}
last = null;
continue;
}
if (last != null)
{
bool success = last.TryMerge(token, out ParserToken newToken);
if (!success)
{
throw new ArgumentException("Failed to parse. Probably because of a unitless number.");
}
if (newToken == null)
{
timespans.Add(last.ToTimeSpan());
last = token;
}
else
{
last = newToken;
}
}
else
{
last = token;
}
}
if (last != null)
{
timespans.Add(last.ToTimeSpan());
}
timeSpans = timespans.Where(t => t.HasValue).Select(t => t.Value).ToArray(); // just the nonnull for now
return(!options.FailOnUnitlessNumber || willSucceed);
}