public override List <ParsedResult> Refine(string originalText, List <ParsedResult> results, Option opt)
{
if (results.Count < 2)
{
return(results);
}
var mergedResult = new List <ParsedResult>();
ParsedResult currResult = null;
ParsedResult prevResult = null;
for (var i = 1; i < results.Count; i++)
{
currResult = results[i];
prevResult = results[i - 1];
if (prevResult.End == null && currResult.End == null &&
IsAbleToMerge(originalText, prevResult, currResult))
{
prevResult = this.MergeResult(originalText, prevResult, currResult);
currResult = null;
i += 1;
}
mergedResult.Add(prevResult);
}
if (currResult != null)
{
mergedResult.Add(currResult);
}
return(mergedResult);
}
private void SetStartEndDates(ParsedResult result, DateTime date, DateTime reference)
{
ParsedComponents pivot = null;
ParsedComponents node = null;
result.End = result.End ?? result.Start.Clone() as ParsedComponents;
if (Config.Direction == DateTimeDirection.Backward)
{
pivot = result.End;
node = result.Start;
}
else
{
pivot = result.Start;
node = result.End;
}
pivot.Imply("year", reference.Year);
pivot.Imply("month", reference.Month);
pivot.Imply("day", reference.Day);
pivot.Imply("hour", reference.Hour);
pivot.Imply("minute", reference.Minute);
pivot.Imply("second", reference.Second);
node.Imply("year", date.Year);
node.Imply("month", date.Month);
node.Imply("day", date.Day);
node.Imply("hour", date.Hour);
node.Imply("minute", date.Minute);
node.Imply("second", date.Second);
result.Tags[this.GetType().Name] = true;
}
protected override ParsedResult Extract(string originalText, DateTime?reference, Match match, Option opt)
{
var text = match.Value.Trim();
if (String.IsNullOrWhiteSpace(text))
{
return(null);
}
var result = new ParsedResult(new TemporalResult {
Index = match.Index, Text = text, Reference = reference
});
int year;
if (int.TryParse(text, out year))
{
result.Start.Assign("day", 1);
result.Start.Assign("month", 1);
result.Start.Assign("year", year);
result.End = result.Start.Clone() as ParsedComponents;
result.End.Assign("month", 12);
result.Tags[this.GetType().Name] = true;
}
else
{
return(null);
}
return(result);
}
protected override ParsedResult Extract(string originalText, DateTime?reference, Match match, Option opt)
{
var text = match.Groups[0].Value.Substring(match.Groups[1].Length);
var index = match.Index + match.Groups[1].Length;
var result = new ParsedResult(new TemporalResult {
Index = index, Text = text, Reference = reference
});
var refMoment = GetMoment(reference);
var startMoment = GetMoment(reference);
var lowerText = text.ToLower();
if (String.Compare(lowerText, "tonight") == 0)
{
// Normally means this coming midnight
result.Start.Imply("hour", 22);
result.Start.Imply("meridiem", 1);
}
else if (new Regex("^tomorrow|^tmr").Match(lowerText).Success)
{
// Check not "Tomorrow" on late night
if (refMoment.Hour > 1)
{
startMoment.Day += 1;
}
}
else if (new Regex("^yesterday").Match(lowerText).Success)
{
startMoment.Day -= 1;
}
else if (new Regex(@"last\s*night").Match(lowerText).Success)
{
result.Start.Imply("hour", 0);
if (refMoment.Hour > 6)
{
startMoment.Day -= 1;;
}
}
else if (new Regex("now", RegexOptions.IgnoreCase).Match(lowerText).Success)
{
result.Start.Assign("hour", refMoment.Hour);
result.Start.Assign("minute", refMoment.Minute);
result.Start.Assign("second", refMoment.Second);
result.Start.Assign("millisecond", refMoment.Millisecond);
}
result.Start.Assign("day", startMoment.Day);
result.Start.Assign("month", startMoment.Month);
result.Start.Assign("year", startMoment.Year);
result.Tags["ENCasualDateParser"] = true;
return(result);
}
private bool IsAbleToMerge(string text, ParsedResult result1, ParsedResult result2)
{
var begin = result1.Index + result1.Text.Length;
var end = result2.Index;
string textBetween = String.Empty;
if (end > begin)
{
textBetween = text.Substring(begin, (end - begin));
}
else
{
textBetween = text.Substring(end, (begin - end)); //swap
}
return(Pattern.Match(textBetween).Success);
}
protected void PredictAppropriateYear(DateTime?reference, int month, int day, ref ParsedResult result)
{
var refMoment = new DateTime(reference.Value.Year, month, day);
var nextYear = new DateTime(refMoment.Year + 1, refMoment.Month, refMoment.Day);
var lastYear = new DateTime(refMoment.Year - 1, refMoment.Month, refMoment.Day);
var distanceToCurrentYearDate = (refMoment - reference.Value).TotalHours;
var distanceToNextYearDate = (nextYear - reference.Value).TotalHours;
var distanceToPreviousYearDate = (lastYear - reference.Value).TotalHours;
if (Config.Direction == DateTimeDirection.Default)
{
//set the year based on nearest of the 3 dates from now
//- the one in previous year
//- the one in current year
//- the one in next year
if (Math.Abs(distanceToNextYearDate) < Math.Abs(distanceToCurrentYearDate))
{
refMoment = nextYear;
}
else if (Math.Abs(distanceToPreviousYearDate) < Math.Abs(distanceToCurrentYearDate))
{
refMoment = lastYear;
}
}
//if distance to current year is positive with always-backward config, set to last year, else set to current year
else if (Config.Direction == DateTimeDirection.Backward && distanceToCurrentYearDate > 0)
{
refMoment = lastYear;
}
//if distance to current year is negative with always-forward config, set to next year, else set to current year
else if (Config.Direction == DateTimeDirection.Forward && distanceToCurrentYearDate < 0)
{
refMoment = nextYear;
}
result.Start.Assign("day", day);
result.Start.Assign("month", month);
result.Start.Imply("year", refMoment.Year);
}
protected override ParsedResult Extract(string originalText, DateTime?reference, Match match, Option opt)
{
var index = match.Index + match.Groups[1].Length;
var text = match.Groups[0].Value.Substring(match.Groups[1].Length, match.Groups[0].Length - match.Groups[1].Length);
var result = new ParsedResult(new TemporalResult
{
Text = text,
Index = index,
Reference = reference
});
var numStr = match.Groups[3].Value.ToLower();
INTEGER_WORDS numEnum;
int num = -1;
if (Enum.TryParse(numStr, true, out numEnum) && Enum.IsDefined(typeof(INTEGER_WORDS), numEnum))
{
num = (int)numEnum;
}
else if (String.Compare(numStr, "a", true) == 0 || String.Compare(numStr, "an", true) == 0)
{
num = 1;
}
else if (new Regex("few", RegexOptions.IgnoreCase).Match(numStr).Success)
{
num = 3;
}
else if (new Regex("half", RegexOptions.IgnoreCase).Match(numStr).Success)
{ //let's take care of half if the requirement comes!
//num = 0.5;
}
else
{
int.TryParse(numStr, out num); //failed int.parse => num = 0
}
DateTime date = new DateTime(reference.Value.Year, reference.Value.Month, reference.Value.Day);
if (new Regex("day|week|month|year", RegexOptions.IgnoreCase).Match(match.Groups[4].Value).Success)
{
if (new Regex("day", RegexOptions.IgnoreCase).Match(match.Groups[4].Value).Success)
{
if (Config.Direction == DateTimeDirection.Backward)
{
date = date.AddDays(-num);
}
else
{
date = date.AddDays(num);
}
}
else if (new Regex("week", RegexOptions.IgnoreCase).Match(match.Groups[4].Value).Success)
{
if (Config.Direction == DateTimeDirection.Backward)
{
date = date.AddDays(-num * 7);
}
else
{
date = date.AddDays(num * 7);
}
}
else if (new Regex("month", RegexOptions.IgnoreCase).Match(match.Groups[4].Value).Success)
{
if (Config.Direction == DateTimeDirection.Backward)
{
date = date.AddMonths(-num);
}
else
{
date = date.AddMonths(num);
}
}
else if (new Regex("year", RegexOptions.IgnoreCase).Match(match.Groups[4].Value).Success)
{
if (Config.Direction == DateTimeDirection.Backward)
{
date = date.AddYears(-num);
}
else
{
date = date.AddYears(num);
}
}
}
else if (new Regex("hour", RegexOptions.IgnoreCase).Match(match.Groups[4].Value).Success)
{
if (Config.Direction == DateTimeDirection.Backward)
{
date = date.AddHours(-num);
}
else
{
date = date.AddHours(num);
}
}
else if (new Regex("min", RegexOptions.IgnoreCase).Match(match.Groups[4].Value).Success)
{
if (Config.Direction == DateTimeDirection.Backward)
{
date = date.AddMinutes(-num);
}
else
{
date = date.AddMinutes(num);
}
}
else if (new Regex("second", RegexOptions.IgnoreCase).Match(match.Groups[4].Value).Success)
{
if (Config.Direction == DateTimeDirection.Backward)
{
date = date.AddSeconds(-num);
}
else
{
date = date.AddSeconds(num);
}
}
SetStartEndDates(result, date, reference ?? DateTime.Now);
return(result);
}
private ParsedResult MergeResult(string text, ParsedResult fromResult, ParsedResult toResult)
{
if (!IsWeekdayResult(fromResult) && !IsWeekdayResult(toResult))
{
foreach (var kvp in toResult.Start.knownValues)
{
if (!fromResult.Start.IsCertain(kvp.Key))
{
fromResult.Start.Assign(kvp.Key, toResult.Start.GetValue(kvp.Key));
}
}
foreach (var kvp in fromResult.Start.knownValues)
{
if (!toResult.Start.IsCertain(kvp.Key))
{
toResult.Start.Assign(kvp.Key, fromResult.Start.GetValue(kvp.Key));
}
}
}
if (fromResult.Start.Date > toResult.Start.Date)
{
var fromMoment = fromResult.Start.Date;
var toMoment = toResult.Start.Date;
if (IsWeekdayResult(fromResult) && fromMoment.AddDays(-7) < toMoment)
{
fromMoment = fromMoment.AddDays(-7);
fromResult.Start.Imply("day", fromMoment.Day);
fromResult.Start.Imply("month", fromMoment.Month);
fromResult.Start.Imply("year", fromMoment.Year);
}
else if (this.IsWeekdayResult(toResult) && toMoment.AddDays(7) > fromMoment)
{
toMoment = toMoment.AddDays(7);
toResult.Start.Imply("day", toMoment.Day);
toResult.Start.Imply("month", toMoment.Month);
toResult.Start.Imply("year", toMoment.Year);
}
else
{
var tmp = toResult;
toResult = fromResult;
fromResult = tmp;
}
}
fromResult.End = toResult.Start;
foreach (var tag in toResult.Tags)
{
fromResult.Tags[tag.Key] = true;
}
var startIndex = Math.Min(fromResult.Index, toResult.Index);
var endIndex = Math.Max(
fromResult.Index + fromResult.Text.Length,
toResult.Index + toResult.Text.Length);
fromResult.Index = startIndex;
fromResult.Text = text.Substring(startIndex, (endIndex - startIndex));
fromResult.Tags["ENMergeDateTimeRefiner"] = true;
return(fromResult);
}
private bool IsWeekdayResult(ParsedResult result)
{
return(result.Start.IsCertain("weekday") && !result.Start.IsCertain("day"));
}
protected override ParsedResult Extract(string originalText, DateTime?reference, Match match, Option opt)
{
// This pattern can be overlaped Ex. [12] AM, 1[2] AM
if (match.Index > 0 && new Regex(@"/\w/", RegexOptions.IgnoreCase).Match(originalText[match.Index - 1].ToString()).Success)
{
return(null);
}
int index = match.Index + match.Groups[1].Length;
string text = match.Groups[0].Value.Substring(match.Groups[1].Length);
var result = new ParsedResult(new TemporalResult
{
Text = text,
Index = index,
Reference = reference
});
result.Tags["ENTimeExpressionParser"] = true;
result.Start.Imply("day", reference.Value.Day);
result.Start.Imply("month", reference.Value.Month);
result.Start.Imply("year", reference.Value.Year);
var hour = 0;
var minute = 0;
var meridiem = -1;
// ----- Millisecond
if (match.Groups[MILLI_SECOND_GROUP].Captures.Count != 0)
{
int millisecond = 0;
int.TryParse(match.Groups[MILLI_SECOND_GROUP].Value.Substring(0, 3), out millisecond);
if (millisecond >= 1000)
{
return(null);
}
result.Start.Assign("millisecond", millisecond);
}
// ----- Second
if (match.Groups[SECOND_GROUP].Captures.Count != 0)
{
int second = 0;
int.TryParse(match.Groups[SECOND_GROUP].Value, out second);
if (second >= 60)
{
return(null);
}
result.Start.Assign("second", second);
}
// ----- Hours
if (String.Compare(match.Groups[HOUR_GROUP].Value.ToLower(), "noon", true) == 0)
{
meridiem = 1;
hour = 12;
}
else if (String.Compare(match.Groups[HOUR_GROUP].Value.ToLower(), "midnight", true) == 0)
{
meridiem = 0;
hour = 0;
}
else
{
int.TryParse(match.Groups[HOUR_GROUP].Value, out hour);
}
// ----- Minutes
if (match.Groups[MINUTE_GROUP].Captures.Count != 0)
{
int.TryParse(match.Groups[MINUTE_GROUP].Value, out minute);
}
else if (hour > 100)
{
minute = hour % 100;
hour = (int)(hour / 100);
}
if (minute >= 60)
{
return(null);
}
if (hour > 24)
{
return(null);
}
if (hour >= 12)
{
meridiem = 1;
}
// ----- AM & PM
if (match.Groups[AM_PM_HOUR_GROUP].Captures.Count != 0)
{
if (hour > 12)
{
return(null);
}
var ampm = match.Groups[AM_PM_HOUR_GROUP].Captures[0].Value.ToLower();
if (String.Compare(ampm, "a", true) == 0)
{
meridiem = 0;
if (hour == 12)
{
hour = 0;
}
}
if (String.Compare(ampm, "p", true) == 0)
{
meridiem = 1;
if (hour != 12)
{
hour += 12;
}
}
}
result.Start.Assign("hour", hour);
result.Start.Assign("minute", minute);
if (meridiem >= 0)
{
result.Start.Assign("meridiem", meridiem);
}
else
{
if (hour < 12)
{
result.Start.Imply("meridiem", 0);
}
else
{
result.Start.Imply("meridiem", 1);
}
}
// ==============================================================
// Extracting the "to" chunk
// ==============================================================
match = SECOND_REG_PATTERN.Match(originalText.Substring(result.Index + result.Text.Length));
if (!match.Success)
{
// Not accept number only result
if (new Regex(@"/^\d+$/", RegexOptions.IgnoreCase).Match(result.Text).Success)
{
return(null);
}
return(result);
}
// Pattern "YY.YY -XXXX" is more like timezone offset
if (new Regex((@"/^\s*(\+|\-)\s*\d{3,4}$/"), RegexOptions.IgnoreCase).Match(match.Groups[0].Value).Success)
{
return(result);
}
if (result.End == null)
{
result.End = new ParsedComponents(null, result.Start.Date);
}
hour = 0;
minute = 0;
meridiem = -1;
// ----- Millisecond
if (match.Groups[MILLI_SECOND_GROUP].Captures.Count != 0)
{
int millisecond;
int.TryParse(match.Groups[MILLI_SECOND_GROUP].Value.Substring(0, 3), out millisecond);
if (millisecond >= 1000)
{
return(null);
}
result.End.Assign("millisecond", millisecond);
}
// ----- Second
if (match.Groups[SECOND_GROUP].Captures.Count != 0)
{
int second;
int.TryParse(match.Groups[SECOND_GROUP].Value, out second);
if (second >= 60)
{
return(null);
}
result.End.Assign("second", second);
}
int.TryParse(match.Groups[2].Value, out hour);
// ----- Minute
if (match.Groups[MINUTE_GROUP].Captures.Count != 0)
{
int.TryParse(match.Groups[MINUTE_GROUP].Value, out minute);
if (minute >= 60)
{
return(result);
}
}
else if (hour > 100)
{
minute = hour % 100;
hour = (int)(hour / 100);
}
if (minute >= 60)
{
return(null);
}
if (hour > 24)
{
return(null);
}
if (hour >= 12)
{
meridiem = 1;
}
// ----- AM & PM
if (match.Groups[AM_PM_HOUR_GROUP].Captures.Count != 0)
{
if (hour > 12)
{
return(null);
}
var ampm = match.Groups[AM_PM_HOUR_GROUP].Captures[0].Value.ToLower();
if (String.Compare(ampm, "a", true) == 0)
{
meridiem = 0;
if (hour == 12)
{
hour = 0;
if (!result.End.IsCertain("day"))
{
result.End.Imply("day", result.End.GetValue("day") + 1);
}
}
}
if (ampm == "p")
{
meridiem = 1;
if (hour != 12)
{
hour += 12;
}
}
if (!result.Start.IsCertain("meridiem"))
{
if (meridiem == 0)
{
result.Start.Imply("meridiem", 0);
if (result.Start.GetValue("hour") == 12)
{
result.Start.Assign("hour", 0);
}
}
else
{
result.Start.Imply("meridiem", 1);
if (result.Start.GetValue("hour") != 12)
{
result.Start.Assign("hour", result.Start.GetValue("hour") + 12);
}
}
}
}
result.Text = result.Text + match.Groups[0].Value;
result.End.Assign("hour", hour);
result.End.Assign("minute", minute);
if (meridiem >= 0)
{
result.End.Assign("meridiem", meridiem);
}
else
{
var startAtPM = result.Start.IsCertain("meridiem") && result.Start.GetValue("meridiem") == 1;
if (startAtPM && result.Start.GetValue("hour") > hour)
{
// 10pm - 1 (am)
result.End.Imply("meridiem", 0);
}
else if (hour > 12)
{
result.End.Imply("meridiem", 1);
}
}
if (result.End.Date < result.Start.Date)
{
result.End.Imply("day", result.End.GetValue("day") + 1);
}
return(result);
}
protected override ParsedResult Extract(string originalText, DateTime?reference, Match match, Option opt)
{
var text = match.Groups[0].Value.Substring(match.Groups[1].Length);
var index = match.Index + match.Groups[1].Length;
var result = new ParsedResult(new TemporalResult {
Index = index, Text = text, Reference = reference
});
var refMoment = GetMoment(reference);
var startMoment = GetMoment(reference);
Moment endMoment = null;
var lowerText = text.ToLower();
if (new Regex(@"(\W|^)(latest|recent)|((last|latest|recent|previous)?\s*months?)").Match(lowerText).Success)
{
startMoment.Month -= 1;
if (startMoment.Month == 0) //move to last year
{
startMoment.Year -= 1;
}
}
else if (new Regex(@"(\W|^)(latest|recent)|((last|latest|recent|previous)\s*quarters?)").Match(lowerText).Success)
{
SetDateRangeForQuarterOffset(-1, ref startMoment, ref endMoment);
}
else if (new Regex(@"(\W|^)(current|present)|((this|current|present)\s*quarters?)").Match(lowerText).Success)
{
SetDateRangeForQuarterOffset(-1, ref startMoment, ref endMoment);
}
else if (new Regex(@"(\W|^)((last|latest|recent|previous)\s*years?)").Match(lowerText).Success)
{
startMoment.Year -= 1;
startMoment.Month = 1;
endMoment = GetMoment(startMoment.DateTime());
endMoment.Month = 12;
}
else if (new Regex(@"(\W|^)((this|current|present)\s*years?)").Match(lowerText).Success)
{
startMoment.Month = 1;
endMoment = GetMoment(startMoment.DateTime());
endMoment.Month = 12;
}
else if (new Regex(@"(\W|^)(annual|trends?|evolutions?|movements?|progressions?)").Match(lowerText).Success)
{
//last 12 months
startMoment.Year -= 1;
endMoment = GetMoment(startMoment.DateTime());
endMoment.Month += 11;
if (endMoment.Month > 12)
{
//move to next year
endMoment.Year += 1;
endMoment.Month -= 12;
}
}
else if (match.Groups[7].Captures.Count > 0) //things like 3rd,4th.. comes in 7th group
{
int qrtr;
var qrtrStr = match.Groups[7].Value.Trim().Replace('_', ' ').ToLower();
if (int.TryParse(qrtrStr, out qrtr))
{
SetDateRangeForQuarterIndex(qrtr, ref startMoment, ref endMoment);
}
}
else if (match.Groups[6].Captures.Count > 0) //ordinal number comes in 6th group
{
var ordinalStr = match.Groups[6].Value.Trim().Replace('_', ' ').ToLower();
ORDINAL_WORDS ordinalEnum;
if (Enum.TryParse(ordinalStr, true, out ordinalEnum) && Enum.IsDefined(typeof(ORDINAL_WORDS), ordinalEnum))
{
SetDateRangeForQuarterIndex((int)ordinalEnum, ref startMoment, ref endMoment);
}
}
result.Start.Assign("day", startMoment.Day);
result.Start.Assign("month", startMoment.Month);
result.Start.Assign("year", startMoment.Year);
if (endMoment != null)
{
result.End = result.End ?? result.Start.Clone() as ParsedComponents;
result.End.Assign("day", endMoment.Day);
result.End.Assign("month", endMoment.Month);
result.End.Assign("year", endMoment.Year);
}
result.Tags[this.GetType().Name] = true;
return(result);
}
protected override ParsedResult Extract(string originalText, DateTime?reference, Match match, Option opt)
{
var text = match.Groups[0].Value.Substring(match.Groups[1].Length);
var index = match.Index + match.Groups[1].Length;
var result = new ParsedResult(new TemporalResult
{
Text = text,
Index = index,
Reference = reference
});
result.Start.Assign("year", int.Parse(match.Groups[YEAR_NUMBER_GROUP].Value));
result.Start.Assign("month", int.Parse(match.Groups[MONTH_NUMBER_GROUP].Value));
result.Start.Assign("day", int.Parse(match.Groups[DATE_NUMBER_GROUP].Value));
//validation
if (result.Start.GetValue("month") > 12 || result.Start.GetValue("month") < 1 ||
result.Start.GetValue("day") > 31 || result.Start.GetValue("day") < 1)
{
return(null);
}
if (!String.IsNullOrWhiteSpace(match.Groups[HOUR_NUMBER_GROUP].Value))
{
result.Start.Assign("hour",
int.Parse(match.Groups[HOUR_NUMBER_GROUP].Value));
result.Start.Assign("minute",
int.Parse(match.Groups[MINUTE_NUMBER_GROUP].Value));
if (!String.IsNullOrWhiteSpace(match.Groups[SECOND_NUMBER_GROUP].Value))
{
result.Start.Assign("second",
int.Parse(match.Groups[SECOND_NUMBER_GROUP].Value));
}
if (!String.IsNullOrWhiteSpace(match.Groups[MILLISECOND_NUMBER_GROUP].Value))
{
result.Start.Assign("millisecond",
int.Parse(match.Groups[MILLISECOND_NUMBER_GROUP].Value));
}
if (!String.IsNullOrWhiteSpace(match.Groups[TZD_HOUR_OFFSET_GROUP].Value))
{
result.Start.Assign("timezoneOffset", 0);
}
else
{
var minuteOffset = 0;
var hourOffset = int.Parse(match.Groups[TZD_HOUR_OFFSET_GROUP].Value);
if (!String.IsNullOrWhiteSpace(match.Groups[TZD_MINUTE_OFFSET_GROUP].Value))
{
minuteOffset = int.Parse(match.Groups[TZD_MINUTE_OFFSET_GROUP].Value);
}
var offset = hourOffset * 60;
if (offset < 0)
{
offset -= minuteOffset;
}
else
{
offset += minuteOffset;
}
result.Start.Assign("timezoneOffset", offset);
}
}
result.Tags["ENISOFormatParser"] = true;
return(result);
}
protected override ParsedResult Extract(string originalText, DateTime?reference, Match match, Option opt)
{
var text = match.Groups[0].Value.Substring(match.Groups[1].Length, match.Groups[0].Length - match.Groups[1].Length);
var index = match.Index + match.Groups[1].Length;
var result = new ParsedResult(new TemporalResult
{
Text = text,
Index = index,
Reference = reference
});
var monthStr = match.Groups[MONTH_NAME_GROUP].Value.ToLower();
MONTH_OFFSET monthEnum;
int month = -1;
if (Enum.TryParse(monthStr, true, out monthEnum) && Enum.IsDefined(typeof(MONTH_OFFSET), monthEnum))
{
month = (int)monthEnum;
}
else
{
int.TryParse(monthStr, out month);
}
string dayStr = null;
ORDINAL_WORDS dayEnum;
int day = -1;
if (match.Groups[DATE_NUM_GROUP].Captures.Count != 0)
{
dayStr = match.Groups[DATE_NUM_GROUP].Value.ToLower();
if (Enum.TryParse(dayStr, true, out dayEnum) && Enum.IsDefined(typeof(MONTH_OFFSET), dayEnum))
{
day = (int)dayEnum;
}
else
{
int.TryParse(dayStr, out day);
}
}
else
{
dayStr = match.Groups[DATE_GROUP].Value.Trim().Replace('_', ' ').ToLower();
if (Enum.TryParse(dayStr, true, out dayEnum) && Enum.IsDefined(typeof(ORDINAL_WORDS), dayEnum))
{
day = (int)dayEnum;
}
}
string yearStr = null;
int year = -1;
if (match.Groups[YEAR_GROUP].Captures.Count != 0)
{
yearStr = match.Groups[YEAR_GROUP].Value;
if (new Regex("BE", RegexOptions.IgnoreCase).Match(yearStr).Success)
{
// Buddhist Era
yearStr = Regex.Replace(yearStr, "BE", String.Empty, RegexOptions.IgnoreCase);
int.TryParse(yearStr, out year);
year -= 543;
}
else if (new Regex("BC", RegexOptions.IgnoreCase).Match(yearStr).Success)
{
// Before Christ
yearStr = Regex.Replace(yearStr, "BC", String.Empty, RegexOptions.IgnoreCase);
int.TryParse(yearStr, out year);
year *= -1;
}
else if (new Regex("AD", RegexOptions.IgnoreCase).Match(yearStr).Success)
{
yearStr = Regex.Replace(yearStr, "AD", String.Empty, RegexOptions.IgnoreCase);
int.TryParse(yearStr, out year);
}
else
{
int.TryParse(yearStr, out year);
if (year < 100)
{
year = year + 2000;
}
}
}
if (year != -1)
{
result.Start.Assign("day", day);
result.Start.Assign("month", month);
result.Start.Assign("year", year);
}
else
{
//Find the most appropriated year
PredictAppropriateYear(reference, month, day, ref result);
}
// Weekday component
if (match.Groups[WEEKDAY_GROUP].Captures.Count != 0)
{
var weekdayStr = match.Groups[WEEKDAY_GROUP].Value.ToLower();
WEEKDAY_OFFSET weekdayEnum;
if (Enum.TryParse(weekdayStr, true, out weekdayEnum) && Enum.IsDefined(typeof(WEEKDAY_OFFSET), weekdayEnum))
{
int weekday = (int)weekdayEnum;
result.Start.Assign("weekday", weekday);
}
}
// Text can be 'range' value. Such as '12 - 13 January 2012'
if (match.Groups[DATE_TO_GROUP].Captures.Count != 0)
{
string endDateStr = match.Groups[DATE_TO_NUM_GROUP].Value;
int endDate = -1;
ORDINAL_WORDS endDateEnum;
if (match.Groups[DATE_TO_NUM_GROUP].Captures.Count != 0)
{
int.TryParse(endDateStr, out endDate);
}
else if (Enum.TryParse(endDateStr.Trim().Replace('-', ' '), true, out endDateEnum) &&
Enum.IsDefined(typeof(WEEKDAY_OFFSET), endDateEnum))
{
endDate = (int)endDateEnum;
}
result.End = (ParsedComponents)result.Start.Clone();
result.End.Assign("day", endDate);
}
result.Tags["ENMonthNameLittleEndianParser"] = true;
return(result);
}
protected override ParsedResult Extract(string originalText, DateTime?reference, Match match, Option opt)
{
var index = match.Index + match.Groups[1].Length;
var text = match.Groups[0].Value.Substring(match.Groups[1].Length, match.Groups[0].Length - match.Groups[1].Length);
var result = new ParsedResult(new TemporalResult
{
Text = text,
Index = index,
Reference = reference
});
int month = -1;
var monthStr = match.Groups[MONTH_NAME_GROUP].Value.ToLower();
MONTH_OFFSET monthEnum;
if (Enum.TryParse(monthStr, true, out monthEnum) && Enum.IsDefined(typeof(MONTH_OFFSET), monthEnum))
{
month = (int)monthEnum;
}
var day = 1;
int year = -1;
string yearStr = null;
if (match.Groups[YEAR_GROUP].Captures.Count != 0)
{
yearStr = match.Groups[YEAR_GROUP].Value;
int.TryParse(yearStr, out year);
if (match.Groups[YEAR_BE_GROUP].Captures.Count != 0)
{
if (new Regex("BE", RegexOptions.IgnoreCase).IsMatch(match.Groups[YEAR_BE_GROUP].Value))
{
// Buddhist Era
year = year - 543;
}
else if (new Regex("BC", RegexOptions.IgnoreCase).IsMatch(match.Groups[YEAR_BE_GROUP].Value))
{
// Before Christ
year = -year;
}
}
else if (year < 100)
{
year = year + 2000;
}
}
if (year != -1)
{
result.Start.Imply("day", day);
result.Start.Assign("month", month);
result.Start.Assign("year", year);
}
else
{
//Find the most appropriated year
PredictAppropriateYear(reference, month, day, ref result);
}
result.Tags["ENMonthNameParser"] = true;
return(result);
}
protected override ParsedResult Extract(string originalText, DateTime?reference, Match match, Option opt)
{
if (match.Index > 0 && new Regex(@"/\w/").Match(originalText[match.Index - 1].ToString()).Success)
{
return(null);
}
var text = match.Groups[0].Value;
text = text.Substring(match.Groups[1].Length, match.Groups[0].Length - match.Groups[1].Length);
int index = match.Index + match.Groups[1].Length;
var result = new ParsedResult(new TemporalResult
{
Text = text,
Index = index,
Reference = reference
});
var fragments = Util.ExtractDateTimeUnitFragments(match.Groups[2].Value);
var date = new DateTime(reference.Value.Year, reference.Value.Month, reference.Value.Day);
foreach (var kvp in fragments)
{
switch (kvp.Key)
{
case TEMPORAL_COMPONENT.Year:
date = date.AddYears(-kvp.Value);
break;
case TEMPORAL_COMPONENT.Month:
date = date.AddMonths(-kvp.Value);
break;
case TEMPORAL_COMPONENT.Day:
date = date.AddDays(-kvp.Value);
break;
case TEMPORAL_COMPONENT.Hour:
date = date.AddHours(-kvp.Value);
break;
case TEMPORAL_COMPONENT.Minute:
date = date.AddMinutes(-kvp.Value);
break;
case TEMPORAL_COMPONENT.Second:
date = date.AddSeconds(-kvp.Value);
break;
case TEMPORAL_COMPONENT.Week:
date = date.AddDays(-kvp.Value * 7);
break;
default:
break;
}
}
if ((fragments.ContainsKey(TEMPORAL_COMPONENT.Hour) && fragments[TEMPORAL_COMPONENT.Hour] > 0) ||
(fragments.ContainsKey(TEMPORAL_COMPONENT.Minute) && fragments[TEMPORAL_COMPONENT.Minute] > 0) ||
(fragments.ContainsKey(TEMPORAL_COMPONENT.Second) && fragments[TEMPORAL_COMPONENT.Second] > 0))
{
result.Start.Assign("hour", date.Hour);
result.Start.Assign("minute", date.Minute);
result.Start.Assign("second", date.Second);
result.Tags["ENTimeAgoFormatParser"] = true;
}
if ((fragments.ContainsKey(TEMPORAL_COMPONENT.Day) && fragments[TEMPORAL_COMPONENT.Day] > 0) ||
(fragments.ContainsKey(TEMPORAL_COMPONENT.Month) && fragments[TEMPORAL_COMPONENT.Month] > 0) ||
(fragments.ContainsKey(TEMPORAL_COMPONENT.Year) && fragments[TEMPORAL_COMPONENT.Year] > 0))
{
result.Start.Assign("day", date.Day);
result.Start.Assign("month", date.Month);
result.Start.Assign("year", date.Year);
}
else
{
if (fragments.ContainsKey(TEMPORAL_COMPONENT.Week) && fragments[TEMPORAL_COMPONENT.Week] > 0)
{
result.Start.Imply("weekday", date.Day);
}
result.Start.Imply("day", date.Day);
result.Start.Imply("month", date.Month);
result.Start.Imply("year", date.Year);
}
return(result);
}
