getAllJsonPathsOfCredential function

List<String> getAllJsonPathsOfCredential(dynamic w3cCredential)

Returns all json-paths of the relevant keys used in the credentialSubject-part of a w3cCredential.

Implementation

List<String> getAllJsonPathsOfCredential(dynamic w3cCredential) {
  var cred = credentialToMap(w3cCredential);
  if (cred.containsKey('credentialSubject')) cred = cred['credentialSubject'];
  List<String> paths = [];
  cred.forEach((key, value) {
    if (!(key == 'type' ||
        key == '@type' ||
        key == '@context' ||
        key == 'id')) {
      if (value is String || value is num || value is bool) {
        paths.add(key);
      } else if (value is Map) {
        var objectPaths = getAllJsonPathsOfCredential(value);
        for (var element in objectPaths) {
          paths.add('$key.$element');
        }
      } else if (value is List) {
        for (int i = 0; i < value.length; i++) {
          if (value[i] is String || value[i] is num || value[i] is bool) {
            paths.add('$key.$i');
          } else if (value[i] is Map) {
            var objectPaths = getAllJsonPathsOfCredential(value[i]);
            for (var element in objectPaths) {
              paths.add('$key.$i.$element');
            }
          } else {
            throw Exception(
                'Malformed array element in array with key $key at index $i');
          }
        }
      } else {
        throw Exception('Unknown data type at key $key');
      }
    }
  });

  return paths;
}