public static DateTime? FindStartDate(this LuisResult result, UserState userState)
{
//
// We special-case "now" since it most likely overrules anything else we might see.
//
if (result.IsStartTimeNow())
{
var localNow = userState.ConvertToLocalTime(DateTime.UtcNow);
return localNow.Date;
}
TimeSpan maxDaysInFuture = TimeSpan.FromDays(30); // Limit how far in the future we can recognize
EntityRecommendation builtinDate = null;
result.TryFindEntity(EntityBuiltinDate, out builtinDate);
var parser = new Chronic.Parser(
new Chronic.Options
{
Context = Chronic.Pointer.Type.Future,
Clock = () =>
{
var utcNow = DateTime.UtcNow;
var tzOffset = userState.LocalOffsetForDate(utcNow);
return new DateTime((utcNow + tzOffset).Ticks, DateTimeKind.Unspecified);
}
});
if (builtinDate != null && builtinDate.Resolution.ContainsKey("date"))
{
//
// Give DateTime a crack at parsing it first. This handles cases like MM/DD which Chronic
// can't handle, for some reason.
//
DateTime date;
if (DateTime.TryParse(builtinDate.Entity, out date))
{
date = date.Date;
// Only accept dates in the reasonably near future.
if (date >= DateTime.Now.Date && date <= DateTime.Now.Date + maxDaysInFuture)
{
return date;
}
}
var span = parser.Parse(builtinDate.Entity);
if (span != null)
{
var when = span.Start ?? span.End;
return when.Value.Date;
}
}
foreach (var startDate in result.Entities.Where(e => e.Type == EntityStart))
{
var span = parser.Parse(startDate.Entity);
if (span != null)
{
var when = span.Start ?? span.End;
if (when.Value.HasDate())
{
return when.Value.Date;
}
}
}
return null;
}
public static DateTime? FindStartTime(this LuisResult result, UserState userState)
{
//
// We special-case "now" since it most likely overrules anything else we might see.
// We snap the time to the "best" nearby time-slot (15-minute intervals).
//
if (result.IsStartTimeNow())
{
return userState.LocalTime().ToNearestTimeSlot();
}
EntityRecommendation builtinTime = null;
result.TryFindEntity(EntityBuiltinTime, out builtinTime);
var parser = new Chronic.Parser(
new Chronic.Options
{
Context = Chronic.Pointer.Type.Future,
Clock = () =>
{
var utcNow = DateTime.UtcNow;
var tzOffset = userState.LocalOffsetForDate(utcNow);
return new DateTime((utcNow + tzOffset).Ticks, DateTimeKind.Unspecified);
}
});
if (builtinTime != null && builtinTime.Resolution.ContainsKey("time"))
{
var span = parser.Parse(builtinTime.Entity);
if (span != null)
{
var when = span.Start ?? span.End;
if (when.Value.HasTime())
{
return when.Value;
}
}
}
foreach (var startDate in result.Entities.Where(e => e.Type == EntityStart))
{
var span = parser.Parse(startDate.Entity.Replace("at ", string.Empty));
if (span != null)
{
var when = span.Start ?? span.End;
if (when.Value.HasTime())
{
return DateTime.MinValue + when.Value.TimeOfDay;
}
}
}
return null;
}
