decode static method

List<int> decode(String data, [ String? customAlphabet ])

Decode the provided Base32 string into a List of bytes. Optionally, you can specify a custom alphabet for decoding.

Implementation

static List<int> decode(String data, [String? customAlphabet]) {
  try {
    /// Add padding characters to the input data as needed.
    data = _Base32Utils.addPadding(data);

    /// If a custom alphabet is specified, translate the input data to the standard Base32 alphabet.
    if (customAlphabet != null) {
      data = _Base32Utils.translateAlphabet(
        data,
        customAlphabet,
        _Base32Const.alphabet,
      );
    }

    /// Decode the Base32 string and obtain the decoded bytes.
    return _Base32Utils._b32decode(_Base32Const.alphabet, data);
  } catch (_) {
    /// Handle exceptions by throwing an error for invalid Base32 strings.
    throw ArgumentException.invalidOperationArguments(
      "decode",
      name: "data",
      reason: 'Invalid Base32 string',
    );
  }
}