public static List <Token> ExtractorDurationWithBeforeAndAfter(string text, ExtractResult er, List <Token> ret,
IDateTimeUtilityConfiguration utilityConfiguration)
{
var pos = (int)er.Start + (int)er.Length;
if (pos <= text.Length)
{
var afterString = text.Substring(pos);
var beforeString = text.Substring(0, (int)er.Start);
var isTimeDuration = utilityConfiguration.TimeUnitRegex.Match(er.Text).Success;
if (MatchingUtil.GetAgoLaterIndex(afterString, utilityConfiguration.AgoRegex, out var index))
{
// We don't support cases like "5 minutes from today" for now
// Cases like "5 minutes ago" or "5 minutes from now" are supported
// Cases like "2 days before today" or "2 weeks from today" are also supported
var isDayMatchInAfterString = utilityConfiguration.AgoRegex.Match(afterString).Groups["day"].Success;
if (!(isTimeDuration && isDayMatchInAfterString))
{
ret.Add(new Token(er.Start ?? 0, (er.Start + er.Length ?? 0) + index));
}
if (utilityConfiguration.CheckBothBeforeAfter && !isDayMatchInAfterString)
{
// check if regex match is split between beforeString and afterString
string beforeAfterStr = beforeString + afterString.Substring(0, index);
if (MatchingUtil.GetAgoLaterIndexInBeforeString(beforeAfterStr, utilityConfiguration.AgoRegex, out var indexStart))
{
isDayMatchInAfterString = utilityConfiguration.AgoRegex.Match(beforeAfterStr).Groups["day"].Success;
if (isDayMatchInAfterString && !(isTimeDuration && isDayMatchInAfterString))
{
ret.Add(new Token(indexStart, (er.Start + er.Length ?? 0) + index));
}
}
}
}
else if (utilityConfiguration.CheckBothBeforeAfter && MatchingUtil.GetAgoLaterIndexInBeforeString(beforeString, utilityConfiguration.AgoRegex, out index))
{
// Check also beforeString
var isDayMatchInBeforeString = utilityConfiguration.AgoRegex.Match(beforeString).Groups["day"].Success;
if (!(isTimeDuration && isDayMatchInBeforeString))
{
ret.Add(new Token(index, (er.Start + er.Length ?? 0) + index));
}
}
else if (MatchingUtil.GetAgoLaterIndex(afterString, utilityConfiguration.LaterRegex, out index) || (utilityConfiguration.CheckBothBeforeAfter &&
MatchingUtil.GetAgoLaterIndexInBeforeString(beforeString, utilityConfiguration.LaterRegex, out index)))
{
Token tokAfter = null, tokBefore = null;
if (MatchingUtil.GetAgoLaterIndex(afterString, utilityConfiguration.LaterRegex, out index))
{
var isDayMatchInAfterString = utilityConfiguration.LaterRegex.Match(afterString).Groups["day"].Success;
if (!(isTimeDuration && isDayMatchInAfterString))
{
tokAfter = new Token(er.Start ?? 0, (er.Start + er.Length ?? 0) + index);
}
}
// Check also beforeString
if (utilityConfiguration.CheckBothBeforeAfter && MatchingUtil.GetAgoLaterIndexInBeforeString(beforeString, utilityConfiguration.LaterRegex, out index))
{
var isDayMatchInBeforeString = utilityConfiguration.LaterRegex.Match(beforeString).Groups["day"].Success;
if (!(isTimeDuration && isDayMatchInBeforeString))
{
tokBefore = new Token(index, er.Start + er.Length ?? 0);
}
}
if (tokAfter != null && tokBefore != null && tokBefore.Start + tokBefore.Length > tokAfter.Start)
{
// merge overlapping tokens
ret.Add(new Token(tokBefore.Start, tokAfter.Start + tokAfter.Length - tokBefore.Start));
}
else if (tokAfter != null)
{
ret.Add(tokAfter);
}
else if (tokBefore != null)
{
ret.Add(tokBefore);
}
}
else if (MatchingUtil.GetTermIndex(beforeString, utilityConfiguration.InConnectorRegex, out index))
{
// For range unit like "week, month, year", it should output dateRange or datetimeRange
if (!utilityConfiguration.RangeUnitRegex.IsMatch(er.Text))
{
if (er.Start != null && er.Length != null && (int)er.Start >= index)
{
ret.Add(new Token((int)er.Start - index, (int)er.Start + (int)er.Length));
}
}
}
else if (utilityConfiguration.CheckBothBeforeAfter && MatchingUtil.GetAgoLaterIndex(afterString, utilityConfiguration.InConnectorRegex, out index))
{
// Check also afterString
// For range unit like "week, month, year", it should output dateRange or datetimeRange
if (!utilityConfiguration.RangeUnitRegex.IsMatch(er.Text))
{
if (er.Start != null && er.Length != null)
{
ret.Add(new Token((int)er.Start, (int)er.Start + (int)er.Length + index));
}
}
}
else if (MatchingUtil.GetTermIndex(beforeString, utilityConfiguration.WithinNextPrefixRegex, out index))
{
// For range unit like "week, month, year, day, second, minute, hour", it should output dateRange or datetimeRange
if (!utilityConfiguration.DateUnitRegex.IsMatch(er.Text) && !utilityConfiguration.TimeUnitRegex.IsMatch(er.Text))
{
if (er.Start != null && er.Length != null && (int)er.Start >= index)
{
ret.Add(new Token((int)er.Start - index, (int)er.Start + (int)er.Length));
}
}
}
else if (utilityConfiguration.CheckBothBeforeAfter && MatchingUtil.GetAgoLaterIndex(afterString, utilityConfiguration.WithinNextPrefixRegex, out index))
{
// Check also afterString
// For range unit like "week, month, year, day, second, minute, hour", it should output dateRange or datetimeRange
if (!utilityConfiguration.DateUnitRegex.IsMatch(er.Text) && !utilityConfiguration.TimeUnitRegex.IsMatch(er.Text))
{
if (er.Start != null && er.Length != null)
{
ret.Add(new Token((int)er.Start, (int)er.Start + (int)er.Length + index));
}
}
}
}
return(ret);
}