// Judge if a date is valid
private static bool IsValidDate(int year, int month, int day)
{
if (month < Constants.MinMonth)
{
year--;
month = Constants.MaxMonth;
}
if (month > Constants.MaxMonth)
{
year++;
month = Constants.MinMonth;
}
return(DateObjectExtension.IsValidDate(year, month, day));
}
// Check every integers and ordinal number for date
private List <Token> NumberWithMonth(string text, DateObject reference)
{
var ret = new List <Token>();
var er = this.Config.OrdinalExtractor.Extract(text);
er.AddRange(this.Config.IntegerExtractor.Extract(text));
foreach (var result in er)
{
int.TryParse((this.Config.NumberParser.Parse(result).Value ?? 0).ToString(), out int num);
if (num < 1 || num > 31)
{
continue;
}
if (result.Start >= 0)
{
// Handling cases like '(Monday,) Jan twenty two'
var frontStr = text.Substring(0, result.Start ?? 0);
var match = this.Config.MonthEnd.Match(frontStr);
if (match.Success)
{
var startIndex = match.Index;
var endIndex = match.Index + match.Length + (result.Length ?? 0);
ExtendWithWeekdayAndYear(
ref startIndex, ref endIndex, Config.MonthOfYear.GetValueOrDefault(match.Groups["month"].Value, reference.Month),
num, text, reference);
ret.Add(new Token(startIndex, endIndex));
continue;
}
// Handling cases like 'for the 25th'
var matches = this.Config.ForTheRegex.Matches(text);
bool isFound = false;
foreach (Match matchCase in matches)
{
if (matchCase.Success)
{
var ordinalNum = matchCase.Groups["DayOfMonth"].Value;
if (ordinalNum == result.Text)
{
var endLength = 0;
if (matchCase.Groups["end"].Value.Length > 0)
{
endLength = matchCase.Groups["end"].Value.Length;
}
ret.Add(new Token(matchCase.Index, matchCase.Index + matchCase.Length - endLength));
isFound = true;
}
}
}
if (isFound)
{
continue;
}
// Handling cases like 'Thursday the 21st', which both 'Thursday' and '21st' refer to a same date
matches = this.Config.WeekDayAndDayOfMonthRegex.Matches(text);
foreach (Match matchCase in matches)
{
if (matchCase.Success)
{
var ordinalNum = matchCase.Groups["DayOfMonth"].Value;
if (ordinalNum == result.Text)
{
// Get week of day for the ordinal number which is regarded as a date of reference month
var date = DateObject.MinValue.SafeCreateFromValue(reference.Year, reference.Month, num);
var numWeekDayInt = (int)date.DayOfWeek;
// Get week day from text directly, compare it with the weekday generated above
// to see whether they refer to the same week day
var extractedWeekDayStr = matchCase.Groups["weekday"].Value;
// calculate matchLength considering that matchCase can preceed or follow result
var matchLength = matchCase.Index < result.Start ? result.Start + result.Length - matchCase.Index : matchCase.Index + matchCase.Length - result.Start;
if (!date.Equals(DateObject.MinValue) &&
numWeekDayInt == Config.DayOfWeek[extractedWeekDayStr] &&
matchCase.Length == matchLength)
{
if (matchCase.Index < result.Start)
{
ret.Add(new Token(matchCase.Index, result.Start + result.Length ?? 0));
}
else
{
ret.Add(new Token((int)result.Start, matchCase.Index + matchCase.Length));
}
isFound = true;
}
}
}
}
if (isFound)
{
continue;
}
// Handling cases like 'Monday 21', which both 'Monday' and '21' refer to the same date
// The year of expected date can be different to the year of referenceDate.
matches = this.Config.WeekDayAndDayRegex.Matches(text);
foreach (Match matchCase in matches)
{
if (matchCase.Success)
{
var matchLength = result.Start + result.Length - matchCase.Index;
if (matchLength == matchCase.Length)
{
// check if day number is compatible with reference month
if (DateObjectExtension.IsValidDate(reference.Year, reference.Month, num) || !this.Config.CheckBothBeforeAfter)
{
ret.Add(new Token(matchCase.Index, result.Start + result.Length ?? 0));
isFound = true;
}
}
}
}
if (isFound)
{
continue;
}
// Handling cases like '20th of next month'
var suffixStr = text.Substring(result.Start + result.Length ?? 0);
var beginMatch = this.Config.RelativeMonthRegex.MatchBegin(suffixStr.Trim(), trim: true);
if (beginMatch.Success && beginMatch.Index == 0)
{
var spaceLen = suffixStr.Length - suffixStr.Trim().Length;
var resStart = result.Start;
var resEnd = resStart + result.Length + spaceLen + beginMatch.Length;
// Check if prefix contains 'the', include it if any
var prefix = text.Substring(0, resStart ?? 0);
var prefixMatch = this.Config.PrefixArticleRegex.Match(prefix);
if (prefixMatch.Success)
{
resStart = prefixMatch.Index;
}
ret.Add(new Token(resStart ?? 0, resEnd ?? 0));
}
// Handling cases like 'second Sunday'
suffixStr = text.Substring(result.Start + result.Length ?? 0);
beginMatch = this.Config.WeekDayRegex.MatchBegin(suffixStr.Trim(), trim: true);
if (beginMatch.Success && num >= 1 && num <= 5 &&
result.Type.Equals(Number.Constants.SYS_NUM_ORDINAL, StringComparison.Ordinal))
{
var weekDayStr = beginMatch.Groups["weekday"].Value;
if (this.Config.DayOfWeek.ContainsKey(weekDayStr))
{
var spaceLen = suffixStr.Length - suffixStr.Trim().Length;
ret.Add(new Token(result.Start ?? 0, result.Start + result.Length + spaceLen + beginMatch.Length ?? 0));
}
}
}
// For cases like "I'll go back twenty second of June"
if (result.Start + result.Length < text.Length)
{
var afterStr = text.Substring(result.Start + result.Length ?? 0);
var match = this.Config.OfMonth.Match(afterStr);
if (match.Success)
{
var startIndex = result.Start ?? 0;
var endIndex = (result.Start + result.Length ?? 0) + match.Length;
ExtendWithWeekdayAndYear(ref startIndex, ref endIndex,
Config.MonthOfYear.GetValueOrDefault(match.Groups["month"].Value, reference.Month),
num, text, reference);
ret.Add(new Token(startIndex, endIndex));
}
}
}
return(ret);
}
// match several other cases
// including '今天', '后天', '十三日'
protected DateTimeResolutionResult ParseImplicitDate(string text, DateObject referenceDate)
{
var ret = new DateTimeResolutionResult();
// handle "十二日" "明年这个月三日" "本月十一日"
var match = this.config.SpecialDate.MatchExact(text, trim: true);
if (match.Success)
{
var yearStr = match.Groups["thisyear"].Value;
var monthStr = match.Groups["thismonth"].Value;
var dayStr = match.Groups["day"].Value;
int month = referenceDate.Month, year = referenceDate.Year;
var day = this.config.DayOfMonth[dayStr];
bool hasYear = false, hasMonth = false;
if (!string.IsNullOrEmpty(monthStr))
{
hasMonth = true;
if (this.config.NextRe.Match(monthStr).Success)
{
month++;
if (month == Constants.MaxMonth + 1)
{
month = Constants.MinMonth;
year++;
}
}
else if (this.config.LastRe.Match(monthStr).Success)
{
month--;
if (month == Constants.MinMonth - 1)
{
month = Constants.MaxMonth;
year--;
}
}
if (!string.IsNullOrEmpty(yearStr))
{
hasYear = true;
if (this.config.NextRe.Match(yearStr).Success)
{
++year;
}
else if (this.config.LastRe.Match(yearStr).Success)
{
--year;
}
}
}
ret.Timex = DateTimeFormatUtil.LuisDate(hasYear ? year : -1, hasMonth ? month : -1, day);
DateObject futureDate, pastDate;
if (day > DateObjectExtension.GetMonthMaxDay(year, month))
{
var futureMonth = month + 1;
var pastMonth = month - 1;
var futureYear = year;
var pastYear = year;
if (futureMonth == Constants.MaxMonth + 1)
{
futureMonth = Constants.MinMonth;
futureYear = year++;
}
if (pastMonth == Constants.MinMonth - 1)
{
pastMonth = Constants.MaxMonth;
pastYear = year--;
}
var isFutureValid = DateObjectExtension.IsValidDate(futureYear, futureMonth, day);
var isPastValid = DateObjectExtension.IsValidDate(pastYear, pastMonth, day);
if (isFutureValid && isPastValid)
{
futureDate = DateObject.MinValue.SafeCreateFromValue(futureYear, futureMonth, day);
pastDate = DateObject.MinValue.SafeCreateFromValue(pastYear, pastMonth, day);
}
else if (isFutureValid && !isPastValid)
{
futureDate = pastDate = DateObject.MinValue.SafeCreateFromValue(futureYear, futureMonth, day);
}
else if (!isFutureValid && !isPastValid)
{
futureDate = pastDate = DateObject.MinValue.SafeCreateFromValue(pastYear, pastMonth, day);
}
else
{
// Fall back to normal cases, might lead to resolution failure
// TODO: Ideally, this failure should be filtered out in extract phase
futureDate = pastDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
}
}
else
{
futureDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
pastDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
if (!hasMonth)
{
if (futureDate < referenceDate)
{
if (IsValidDate(year, month + 1, day))
{
futureDate = futureDate.AddMonths(1);
}
}
if (pastDate >= referenceDate)
{
if (IsValidDate(year, month - 1, day))
{
pastDate = pastDate.AddMonths(-1);
}
else if (DateContext.IsFeb29th(year, month - 1, day))
{
pastDate = pastDate.AddMonths(-2);
}
}
}
else if (!hasYear)
{
if (futureDate < referenceDate)
{
if (IsValidDate(year + 1, month, day))
{
futureDate = futureDate.AddYears(1);
}
}
if (pastDate >= referenceDate)
{
if (IsValidDate(year - 1, month, day))
{
pastDate = pastDate.AddYears(-1);
}
}
}
}
ret.FutureValue = futureDate;
ret.PastValue = pastDate;
ret.Success = true;
return(ret);
}
// handle cases like "昨日", "明日", "大后天"
match = this.config.SpecialDayRegex.MatchExact(text, trim: true);
if (match.Success)
{
var value = referenceDate.AddDays(this.config.GetSwiftDay(match.Value));
ret.Timex = DateTimeFormatUtil.LuisDate(value);
ret.FutureValue = ret.PastValue = DateObject.MinValue.SafeCreateFromValue(value.Year, value.Month, value.Day);
ret.Success = true;
return(ret);
}
// Handle "今から2日曜日" (2 Sundays from now)
var exactMatch = this.config.SpecialDayWithNumRegex.MatchExact(text, trim: true);
if (exactMatch.Success)
{
var numErs = this.config.IntegerExtractor.Extract(text);
var weekdayStr = exactMatch.Groups["weekday"].Value;
if (!string.IsNullOrEmpty(weekdayStr) && numErs.Count > 0)
{
var num = Convert.ToInt32((double)(this.config.NumberParser.Parse(numErs[0]).Value ?? 0));
var value = referenceDate;
// Check whether the determined day of this week has passed.
if (value.DayOfWeek > (DayOfWeek)this.config.DayOfWeek[weekdayStr])
{
num--;
}
while (num-- > 0)
{
value = value.Next((DayOfWeek)this.config.DayOfWeek[weekdayStr]);
}
ret.Timex = DateTimeFormatUtil.LuisDate(value);
ret.FutureValue = ret.PastValue = DateObject.MinValue.SafeCreateFromValue(value.Year, value.Month, value.Day);
ret.Success = true;
return(ret);
}
}
// handle "明日から3週間" (3 weeks from tomorrow)
var durationResult = this.config.DurationExtractor.Extract(text, referenceDate);
var unitMatch = this.config.DurationRelativeDurationUnitRegex.Match(text);
var isWithin = this.config.DurationRelativeDurationUnitRegex.MatchEnd(text, trim: true).Groups[Constants.WithinGroupName].Success;
if ((exactMatch.Success || isWithin) && unitMatch.Success && (durationResult.Count > 0) &&
string.IsNullOrEmpty(unitMatch.Groups["few"].Value))
{
var pr = this.config.DurationParser.Parse(durationResult[0], referenceDate);
var dayStr = unitMatch.Groups["later"].Value;
var future = true;
int swift = 0;
if (pr != null)
{
if (!string.IsNullOrEmpty(dayStr))
{
swift = this.config.GetSwiftDay(dayStr);
}
var resultDateTime = DurationParsingUtil.ShiftDateTime(pr.TimexStr, referenceDate.AddDays(swift), future);
ret.Timex = $"{DateTimeFormatUtil.LuisDate(resultDateTime)}";
ret.FutureValue = ret.PastValue = resultDateTime;
ret.Success = true;
return(ret);
}
}
if (!ret.Success)
{
ret = MatchWeekdayAndDay(text, referenceDate);
}
if (!ret.Success)
{
ret = MatchThisWeekday(text, referenceDate);
}
if (!ret.Success)
{
ret = MatchNextWeekday(text, referenceDate);
}
if (!ret.Success)
{
ret = MatchLastWeekday(text, referenceDate);
}
if (!ret.Success)
{
ret = MatchWeekdayAlone(text, referenceDate);
}
return(ret);
}
// match several other cases
// including '今天', '后天', '十三日'
protected DateTimeResolutionResult ParseImplicitDate(string text, DateObject referenceDate)
{
var ret = new DateTimeResolutionResult();
// handle "十二日" "明年这个月三日" "本月十一日"
var match = this.config.SpecialDate.MatchExact(text, trim: true);
if (match.Success)
{
var yearStr = match.Groups["thisyear"].Value;
var monthStr = match.Groups["thismonth"].Value;
var dayStr = match.Groups["day"].Value;
int month = referenceDate.Month, year = referenceDate.Year;
var day = this.config.DayOfMonth[dayStr];
bool hasYear = false, hasMonth = false;
if (!string.IsNullOrEmpty(monthStr))
{
hasMonth = true;
if (this.config.NextRe.Match(monthStr).Success)
{
month++;
if (month == Constants.MaxMonth + 1)
{
month = Constants.MinMonth;
year++;
}
}
else if (this.config.LastRe.Match(monthStr).Success)
{
month--;
if (month == Constants.MinMonth - 1)
{
month = Constants.MaxMonth;
year--;
}
}
if (!string.IsNullOrEmpty(yearStr))
{
hasYear = true;
if (this.config.NextRe.Match(yearStr).Success)
{
++year;
}
else if (this.config.LastRe.Match(yearStr).Success)
{
--year;
}
}
}
ret.Timex = DateTimeFormatUtil.LuisDate(hasYear ? year : -1, hasMonth ? month : -1, day);
DateObject futureDate, pastDate;
if (day > GetMonthMaxDay(year, month))
{
var futureMonth = month + 1;
var pastMonth = month - 1;
var futureYear = year;
var pastYear = year;
if (futureMonth == Constants.MaxMonth + 1)
{
futureMonth = Constants.MinMonth;
futureYear = year++;
}
if (pastMonth == Constants.MinMonth - 1)
{
pastMonth = Constants.MaxMonth;
pastYear = year--;
}
var isFutureValid = DateObjectExtension.IsValidDate(futureYear, futureMonth, day);
var isPastValid = DateObjectExtension.IsValidDate(pastYear, pastMonth, day);
if (isFutureValid && isPastValid)
{
futureDate = DateObject.MinValue.SafeCreateFromValue(futureYear, futureMonth, day);
pastDate = DateObject.MinValue.SafeCreateFromValue(pastYear, pastMonth, day);
}
else if (isFutureValid && !isPastValid)
{
futureDate = pastDate = DateObject.MinValue.SafeCreateFromValue(futureYear, futureMonth, day);
}
else if (!isFutureValid && !isPastValid)
{
futureDate = pastDate = DateObject.MinValue.SafeCreateFromValue(pastYear, pastMonth, day);
}
else
{
// Fall back to normal cases, might lead to resolution failure
// TODO: Ideally, this failure should be filtered out in extract phase
futureDate = pastDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
}
}
else
{
futureDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
pastDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
if (!hasMonth)
{
if (futureDate < referenceDate)
{
if (IsValidDate(year, month + 1, day))
{
futureDate = futureDate.AddMonths(1);
}
}
if (pastDate >= referenceDate)
{
if (IsValidDate(year, month - 1, day))
{
pastDate = pastDate.AddMonths(-1);
}
else if (DateContext.IsFeb29th(year, month - 1, day))
{
pastDate = pastDate.AddMonths(-2);
}
}
}
else if (!hasYear)
{
if (futureDate < referenceDate)
{
if (IsValidDate(year + 1, month, day))
{
futureDate = futureDate.AddYears(1);
}
}
if (pastDate >= referenceDate)
{
if (IsValidDate(year - 1, month, day))
{
pastDate = pastDate.AddYears(-1);
}
}
}
}
ret.FutureValue = futureDate;
ret.PastValue = pastDate;
ret.Success = true;
return(ret);
}
// handle cases like "昨日", "明日", "大后天"
match = this.config.SpecialDayRegex.MatchExact(text, trim: true);
if (match.Success)
{
var value = referenceDate.AddDays(this.config.GetSwiftDay(match.Value));
ret.Timex = DateTimeFormatUtil.LuisDate(value);
ret.FutureValue = ret.PastValue = DateObject.MinValue.SafeCreateFromValue(value.Year, value.Month, value.Day);
ret.Success = true;
return(ret);
}
if (!ret.Success)
{
ret = MatchThisWeekday(text, referenceDate);
}
if (!ret.Success)
{
ret = MatchNextWeekday(text, referenceDate);
}
if (!ret.Success)
{
ret = MatchLastWeekday(text, referenceDate);
}
if (!ret.Success)
{
ret = MatchWeekdayAlone(text, referenceDate);
}
return(ret);
}
// Match several other cases
// Including 'today', 'the day after tomorrow', 'on 13'
private DateTimeResolutionResult ParseImplicitDate(string text, DateObject referenceDate)
{
var trimmedText = text.Trim();
var ret = new DateTimeResolutionResult();
// Handle "on 12"
var match = this.config.OnRegex.Match(this.config.DateTokenPrefix + trimmedText);
if (match.Success && match.Index == 3 && match.Length == trimmedText.Length)
{
int month = referenceDate.Month, year = referenceDate.Year;
var dayStr = match.Groups["day"].Value.ToLower();
var day = this.config.DayOfMonth[dayStr];
ret.Timex = DateTimeFormatUtil.LuisDate(-1, -1, day);
DateObject futureDate, pastDate;
var tryStr = DateTimeFormatUtil.LuisDate(year, month, day);
if (DateObject.TryParse(tryStr, out DateObject _))
{
futureDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
pastDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
if (futureDate < referenceDate)
{
futureDate = futureDate.AddMonths(+1);
}
if (pastDate >= referenceDate)
{
pastDate = pastDate.AddMonths(-1);
}
}
else
{
futureDate = DateObject.MinValue.SafeCreateFromValue(year, month + 1, day);
pastDate = DateObject.MinValue.SafeCreateFromValue(year, month - 1, day);
}
ret.FutureValue = futureDate;
ret.PastValue = pastDate;
ret.Success = true;
return(ret);
}
// Handle "today", "the day before yesterday"
var exactMatch = this.config.SpecialDayRegex.MatchExact(trimmedText, trim: true);
if (exactMatch.Success)
{
var swift = GetSwiftDay(exactMatch.Value);
var value = referenceDate.AddDays(swift);
ret.Timex = DateTimeFormatUtil.LuisDate(value);
ret.FutureValue = ret.PastValue = value;
ret.Success = true;
return(ret);
}
// Handle "two days from tomorrow"
exactMatch = this.config.SpecialDayWithNumRegex.MatchExact(trimmedText, trim: true);
if (exactMatch.Success)
{
var swift = GetSwiftDay(exactMatch.Groups["day"].Value);
var numErs = this.config.IntegerExtractor.Extract(trimmedText);
var numOfDays = Convert.ToInt32((double)(this.config.NumberParser.Parse(numErs[0]).Value ?? 0));
var value = referenceDate.AddDays(numOfDays + swift);
ret.Timex = DateTimeFormatUtil.LuisDate(value);
ret.FutureValue = ret.PastValue = value;
ret.Success = true;
return(ret);
}
// Handle "two sundays from now"
exactMatch = this.config.RelativeWeekDayRegex.MatchExact(trimmedText, trim: true);
if (exactMatch.Success)
{
var numErs = this.config.IntegerExtractor.Extract(trimmedText);
var num = Convert.ToInt32((double)(this.config.NumberParser.Parse(numErs[0]).Value ?? 0));
var weekdayStr = exactMatch.Groups["weekday"].Value.ToLower();
var value = referenceDate;
// Check whether the determined day of this week has passed.
if (value.DayOfWeek > (DayOfWeek)this.config.DayOfWeek[weekdayStr])
{
num--;
}
while (num-- > 0)
{
value = value.Next((DayOfWeek)this.config.DayOfWeek[weekdayStr]);
}
ret.Timex = DateTimeFormatUtil.LuisDate(value);
ret.FutureValue = ret.PastValue = value;
ret.Success = true;
return(ret);
}
// Handle "next Sunday", "upcoming Sunday"
// We define "upcoming Sunday" as the nearest Sunday to come (not include today)
// We define "next Sunday" as Sunday of next week
exactMatch = this.config.NextRegex.MatchExact(trimmedText, trim: true);
if (exactMatch.Success)
{
var weekdayStr = exactMatch.Groups["weekday"].Value.ToLower();
var value = referenceDate.Next((DayOfWeek)this.config.DayOfWeek[weekdayStr]);
if (this.config.UpcomingPrefixRegex.MatchBegin(trimmedText, trim: true).Success)
{
value = referenceDate.Upcoming((DayOfWeek)this.config.DayOfWeek[weekdayStr]);
}
ret.Timex = DateTimeFormatUtil.LuisDate(value);
ret.FutureValue = ret.PastValue = value;
ret.Success = true;
return(ret);
}
// Handle "this Friday"
exactMatch = this.config.ThisRegex.MatchExact(trimmedText, trim: true);
if (exactMatch.Success)
{
var weekdayStr = exactMatch.Groups["weekday"].Value.ToLower();
var value = referenceDate.This((DayOfWeek)this.config.DayOfWeek[weekdayStr]);
ret.Timex = DateTimeFormatUtil.LuisDate(value);
ret.FutureValue = ret.PastValue = value;
ret.Success = true;
return(ret);
}
// Handle "last Friday", "last mon"
// We define "past Sunday" as the nearest Sunday that has already passed (not include today)
// We define "previous Sunday" as Sunday of previous week
exactMatch = this.config.LastRegex.MatchExact(trimmedText, trim: true);
if (exactMatch.Success)
{
var weekdayStr = exactMatch.Groups["weekday"].Value.ToLower();
var value = referenceDate.Last((DayOfWeek)this.config.DayOfWeek[weekdayStr]);
if (this.config.PastPrefixRegex.MatchBegin(trimmedText, trim: true).Success)
{
value = referenceDate.Past((DayOfWeek)this.config.DayOfWeek[weekdayStr]);
}
ret.Timex = DateTimeFormatUtil.LuisDate(value);
ret.FutureValue = ret.PastValue = value;
ret.Success = true;
return(ret);
}
// Handle "Friday"
exactMatch = this.config.WeekDayRegex.MatchExact(trimmedText, trim: true);
if (exactMatch.Success)
{
var weekdayStr = exactMatch.Groups["weekday"].Value.ToLower();
var weekDay = this.config.DayOfWeek[weekdayStr];
var value = referenceDate.This((DayOfWeek)this.config.DayOfWeek[weekdayStr]);
if (weekDay == 0)
{
weekDay = 7;
}
if (weekDay < (int)referenceDate.DayOfWeek)
{
value = referenceDate.Next((DayOfWeek)weekDay);
}
ret.Timex = "XXXX-WXX-" + weekDay;
var futureDate = value;
var pastDate = value;
if (futureDate < referenceDate)
{
futureDate = futureDate.AddDays(7);
}
if (pastDate >= referenceDate)
{
pastDate = pastDate.AddDays(-7);
}
ret.FutureValue = futureDate;
ret.PastValue = pastDate;
ret.Success = true;
return(ret);
}
// Handle "for the 27th."
match = this.config.ForTheRegex.Match(text);
if (match.Success)
{
int day = 0, month = referenceDate.Month, year = referenceDate.Year;
var dayStr = match.Groups["DayOfMonth"].Value.ToLower();
// Create a extract result which content ordinal string of text
ExtractResult er = new ExtractResult
{
Text = dayStr,
Start = match.Groups["DayOfMonth"].Index,
Length = match.Groups["DayOfMonth"].Length,
};
day = Convert.ToInt32((double)(this.config.NumberParser.Parse(er).Value ?? 0));
ret.Timex = DateTimeFormatUtil.LuisDate(-1, -1, day);
DateObject futureDate;
var tryStr = DateTimeFormatUtil.LuisDate(year, month, day);
if (DateObject.TryParse(tryStr, out DateObject _))
{
futureDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
}
else
{
futureDate = DateObject.MinValue.SafeCreateFromValue(year, month + 1, day);
}
ret.FutureValue = futureDate;
ret.PastValue = ret.FutureValue;
ret.Success = true;
return(ret);
}
// Handling cases like 'Thursday the 21st', which both 'Thursday' and '21st' refer to a same date
match = this.config.WeekDayAndDayOfMothRegex.Match(text);
if (match.Success)
{
int month = referenceDate.Month, year = referenceDate.Year;
// create a extract result which content ordinal string of text
ExtractResult extractResultTmp = new ExtractResult
{
Text = match.Groups["DayOfMonth"].Value,
Start = match.Groups["DayOfMonth"].Index,
Length = match.Groups["DayOfMonth"].Length,
};
// parse the day in text into number
var day = Convert.ToInt32((double)(this.config.NumberParser.Parse(extractResultTmp).Value ?? 0));
// The validity of the phrase is guaranteed in the Date Extractor
ret.Timex = DateTimeFormatUtil.LuisDate(year, month, day);
ret.FutureValue = new DateObject(year, month, day);
ret.PastValue = new DateObject(year, month, day);
ret.Success = true;
return(ret);
}
// Handling cases like 'Monday 21', which both 'Monday' and '21' refer to the same date.
// The year of expected date can be different to the year of referenceDate.
match = this.config.WeekDayAndDayRegex.Match(text);
if (match.Success)
{
int month = referenceDate.Month, year = referenceDate.Year;
// Create a extract result which content ordinal string of text
ExtractResult ertmp = new ExtractResult
{
Text = match.Groups["day"].Value,
Start = match.Groups["day"].Index,
Length = match.Groups["day"].Length,
};
// Parse the day in text into number
var day = Convert.ToInt32((double)(this.config.NumberParser.Parse(ertmp).Value ?? 0));
// Firstly, find a latest date with the "day" as pivotDate.
// Secondly, if the pivotDate equals the referenced date, in other word, the day of the referenced date is exactly the "day".
// In this way, check if the pivotDate is the weekday. If so, then the futureDate and the previousDate are the same date (referenced date).
// Otherwise, increase the pivotDate month by month to find the latest futureDate and decrease the pivotDate month
// by month to the latest previousDate.
// Notice: if the "day" is larger than 28, some months should be ignored in the increase or decrease procedure.
var pivotDate = new DateObject(year, month, 1);
var daysInMonth = DateObject.DaysInMonth(year, month);
if (daysInMonth >= day)
{
pivotDate = DateObject.MinValue.SafeCreateFromValue(year, month, day);
}
else
{
// Add 1 month is enough, since 1, 3, 5, 7, 8, 10, 12 months has 31 days
pivotDate = pivotDate.AddMonths(1);
pivotDate = DateObject.MinValue.SafeCreateFromValue(pivotDate.Year, pivotDate.Month, day);
}
var numWeekDayInt = (int)pivotDate.DayOfWeek;
var extractedWeekDayStr = match.Groups["weekday"].Value.ToLower();
var weekDay = this.config.DayOfWeek[extractedWeekDayStr];
if (!pivotDate.Equals(DateObject.MinValue))
{
if (day == referenceDate.Day && numWeekDayInt == weekDay)
{
// The referenceDate is the weekday and with the "day".
ret.FutureValue = new DateObject(year, month, day);
ret.PastValue = new DateObject(year, month, day);
ret.Timex = DateTimeFormatUtil.LuisDate(year, month, day);
}
else
{
var futureDate = pivotDate;
var pastDate = pivotDate;
while ((int)futureDate.DayOfWeek != weekDay || futureDate.Day != day || futureDate < referenceDate)
{
// Increase the futureDate month by month to find the expected date (the "day" is the weekday) and
// make sure the futureDate not less than the referenceDate.
futureDate = futureDate.AddMonths(1);
var tmp = DateObject.DaysInMonth(futureDate.Year, futureDate.Month);
if (tmp >= day)
{
// For months like January 31, after add 1 month, February 31 won't be returned, so the day should be revised ASAP.
futureDate =
DateObjectExtension.SafeCreateFromValue(futureDate, futureDate.Year, futureDate.Month, day);
}
}
ret.FutureValue = futureDate;
while ((int)pastDate.DayOfWeek != weekDay || pastDate.Day != day || pastDate > referenceDate)
{
// Decrease the pastDate month by month to find the expected date (the "day" is the weekday) and
// make sure the pastDate not larger than the referenceDate.
pastDate = pastDate.AddMonths(-1);
var tmp = DateObject.DaysInMonth(pastDate.Year, pastDate.Month);
if (tmp >= day)
{
// For months like March 31, after minus 1 month, February 31 won't be returned, so the day should be revised ASAP.
pastDate =
DateObjectExtension.SafeCreateFromValue(pastDate, pastDate.Year, pastDate.Month, day);
}
}
ret.PastValue = pastDate;
if (weekDay == 0)
{
weekDay = 7;
}
ret.Timex = "XXXX-WXX-" + weekDay;
}
}
ret.Success = true;
return(ret);
}
return(ret);
}