public static Extraction ValidateAndExtract(string input, string culture)
{
// Get DateTime model for the specified culture
var model = DateTimeRecognizer.GetSingleCultureInstance(culture).GetDateTimeModel();
var results = model.Parse(input);
// Check there are valid results
if (results.Count > 0 && results.First().TypeName.StartsWith("datetimeV2"))
{
// The DateTime model can return several resolution types (https://github.com/Microsoft/Recognizers-Text/blob/master/.NET/Microsoft.Recognizers.Text.DateTime/Constants.cs#L7-L14)
// We only care for those with a date, date and time, or date time period:
// date, daterange, datetime, datetimerange
var first = results.First();
var resolutionValues = (IList <Dictionary <string, string> >)first.Resolution["values"];
var subType = first.TypeName.Split('.').Last();
if (subType.Contains("date") && !subType.Contains("range"))
{
// a date (or date & time) or multiple
var moment = resolutionValues.Select(v => DateTime.Parse(v["value"])).FirstOrDefault();
if (IsFuture(moment))
{
// a future moment, valid!
return(new Extraction
{
IsValid = true,
Values = new[] { moment }
});
}
// a past moment
return(new Extraction
{
IsValid = false,
Values = new[] { moment },
ErrorMessage = PastValueErrorMessage.Replace("$moment$", MomentOrRangeToString(moment))
});
}
else if (subType.Contains("date") && subType.Contains("range"))
{
// range
var from = DateTime.Parse(resolutionValues.First()["start"]);
var to = DateTime.Parse(resolutionValues.First()["end"]);
if (IsFuture(from) && IsFuture(to))
{
// future
return(new Extraction
{
IsValid = true,
Values = new[] { from, to }
});
}
var values = new[] { from, to };
return(new Extraction
{
IsValid = false,
Values = values,
ErrorMessage = PastValueErrorMessage.Replace("$moment$", MomentOrRangeToString(values))
});
}
}
return(new Extraction
{
IsValid = false,
Values = Enumerable.Empty <DateTime>(),
ErrorMessage = "I'm sorry, that doesn't seem to be a valid delivery date and time"
});
}