YamlNode _traverse()

in lib/src/editor.dart [445:487]
33 lines of code
12 McCabe index (conditional complexity)

  YamlNode _traverse(Iterable<Object?> path,
      {bool checkAlias = false, YamlNode Function()? orElse}) {
    if (path.isEmpty) return _contents;

    var currentNode = _contents;
    final pathList = path.toList();

    for (var i = 0; i < pathList.length; i++) {
      final keyOrIndex = pathList[i];

      if (checkAlias && _aliases.contains(currentNode)) {
        throw AliasError(path, currentNode);
      }

      if (currentNode is YamlList) {
        final list = currentNode;
        if (!isValidIndex(keyOrIndex, list.length)) {
          return _pathErrorOrElse(path, path.take(i + 1), list, orElse);
        }

        currentNode = list.nodes[keyOrIndex as int];
      } else if (currentNode is YamlMap) {
        final map = currentNode;

        if (!containsKey(map, keyOrIndex)) {
          return _pathErrorOrElse(path, path.take(i + 1), map, orElse);
        }
        final keyNode = getKeyNode(map, keyOrIndex);

        if (checkAlias) {
          if (_aliases.contains(keyNode)) throw AliasError(path, keyNode);
        }

        currentNode = map.nodes[keyNode]!;
      } else {
        return _pathErrorOrElse(path, path.take(i + 1), currentNode, orElse);
      }
    }

    if (checkAlias) _assertNoChildAlias(path, currentNode);

    return currentNode;
  }