private ParseResult Parse(Ean13 ean13, string originalInput)
{
if (!ISBN13.TryParse(_prefixTrees, ean13, out var metadataOption))
{
return(new ParseError(
$"Ean: {originalInput}, is not a valid ISBN13 number.",
ISBNParseErrorKind.InvalidISBN13));
}
return(metadataOption.Match <ParseResult>(
() => new ParseError(
$"No metadata found for: {originalInput}, it probably contains some unknown or invalid ranges.",
ISBNParseErrorKind.NoMetadataFound),
some => some
));
}
public ParseResult Parse(string originalInput)
{
if (string.IsNullOrWhiteSpace(originalInput))
{
return(new ParseError(
$"Input {originalInput} is not a valid EAN13 number: {originalInput}",
ISBNParseErrorKind.InvalidEan));
}
if (originalInput.Length == 10)
{
//Try ISBN10
var isbn10ParseResult = ISBN10.TryParse(originalInput, out var isbn10);
if (isbn10ParseResult != ISBN10.ResultCode.Success)
{
return(new ParseError(
$"Input {originalInput} is not a valid ISBN10 number: {isbn10ParseResult.ToString()}",
ISBNParseErrorKind.InvalidISBN10));
}
//Input is ISBN10, now convert to EAN13
var convertResult = Ean13.TryConvertFomISBN10(isbn10, out var converted);
if (convertResult != Ean13.ResultCode.Success)
{
return(new ParseError(
$"Could not convert ISBN10 {originalInput} to EAN13: {isbn10ParseResult.ToString()}",
ISBNParseErrorKind.InvalidISBN10));
}
return(Parse(converted, originalInput));
}
//Assume EAN13 input
var ean13ParseResult = Ean13.TryParse(originalInput, out var ean13);
if (ean13ParseResult != Ean13.ResultCode.Success)
{
return(new ParseError(
$"Input {originalInput} is not a valid EAN13 number: {ean13ParseResult.ToString()}",
ISBNParseErrorKind.InvalidEan));
}
return(Parse(ean13, originalInput));
}
public static ResultCode Create(long digitsWithoutChecksum, out Ean13 value)
{
if (digitsWithoutChecksum <= 0)
{
value = default;
return(ResultCode.InvalidNotAValidNumber);
}
//If the number of digits >= 13 then
//invalid number of digits
if (digitsWithoutChecksum >= 100_000_000_000_0)
{
value = default;
return(ResultCode.InvalidNumberOfDigits);
}
var ean13LWithDummyChecksum = digitsWithoutChecksum * 10;
var checksum = CalculateChecksum(ean13LWithDummyChecksum);
value = new Ean13(ean13LWithDummyChecksum + checksum, checksum);
return(ResultCode.Success);
}
