private static bool TryParseAsValue(WitEntity entity, DateTimeParserSettings settings, out DateTimeRange range)
{
if (entity != null && DateTimeOffset.TryParse(entity.Value, out DateTimeOffset date))
{
switch (entity.Grain)
{
case GrainHour:
range = new DateTimeRange(date, date.AddHours(1));
return(true);
case GrainDay:
range = new DateTimeRange(date);
return(true);
case GrainWeek:
range = new DateTimeRange(date, date.AddDays(settings.WeekDuration));
return(true);
case GrainMonth:
range = new DateTimeRange(date, date.AddMonths(1));
return(true);
case GrainYear:
range = new DateTimeRange(date, date.AddYears(1));
return(true);
}
}
range = null;
return(false);
}
public static bool TryParse(WitEntity entity, out DateTimeRange range, DateTimeParserSettings settings = null)
{
settings = settings ?? DateTimeParserSettings.Default;
if (IsDate(entity))
{
switch (entity.Type)
{
case TypeValue:
return(TryParseAsValue(entity, settings, out range));
case TypeInterval:
return(TryParseAsInterval(entity, settings, out range));
}
}
range = null;
return(false);
}
private static bool TryParseAsInterval(WitEntity entity, DateTimeParserSettings settings, out DateTimeRange range)
{
TryParseAsValue(entity.From, settings, out DateTimeRange fromRange);
TryParseAsValue(entity.To, settings, out DateTimeRange toRange);
if (fromRange != null && toRange != null)
{
range = new DateTimeRange(fromRange.StartDate, toRange.EndDate);
return(true);
}
else if (fromRange != null)
{
range = new DateTimeRange(fromRange.StartDate, DateTime.MaxValue);
return(true);
}
else if (toRange != null)
{
range = new DateTimeRange(DateTime.Now, toRange.EndDate);
return(true);
}
range = null;
return(false);
}
