internal static DateTime Transform(this DateTime dateTime, DateTimeTransformation transform, DateTimeSpecificationBounds boundary, Func <DateTime, int, DateTime> relative, Func <DateTime, int, DateTime> exact, Func <DateTime, DateTime> max)
{
if (transform.IsEmpty)
{
return(dateTime);
}
DateTime result = dateTime;
if (transform.Type == DateTimeTransformationType.Relative)
{
result = relative(result, transform.Value);
}
else
{
if (transform.Type == DateTimeTransformationType.Exact)
{
result = exact(result, transform.Value);
}
else if (transform.Type == DateTimeTransformationType.Max)
{
result = max(result);
}
if (boundary == DateTimeSpecificationBounds.Upper)
{
result = relative(result, 1).AddTicks(-1);
}
}
return(result);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
DateTimeTransformation trans = new DateTimeTransformation();
if (reader.TokenType == JsonToken.Integer)
{
int val = Convert.ToInt32(reader.Value);
trans.Type = val <= 0 ? DateTimeTransformationType.Relative : DateTimeTransformationType.Exact;
trans.Value = val;
}
else
{
string val = (string)reader.Value;
if (val == "*")
{
trans.Type = DateTimeTransformationType.Max;
}
else if (val.StartsWith("-") || val.StartsWith("+"))
{
trans.Type = DateTimeTransformationType.Relative;
string num = val.Replace("-", "").Replace("+", "").Replace("=", "");
trans.Value = Int32.Parse(num) * (val.StartsWith("-") ? -1 : 1);
}
else if (val == string.Empty)
{
trans.Type = DateTimeTransformationType.None;
}
else
{
throw new FormatException(String.Format("'{0}' is not a valid value for DateTimeTransformation.", val));
}
}
return(trans);
}
