transformListToMap static method

Map<String, dynamic> transformListToMap(List<Map<String, dynamic>> dataList, Config config, bool isNotRootNode(Map<String, dynamic> treeNode, Config config))

@desc List to map

Implementation

static Map<String, dynamic> transformListToMap(
    List<Map<String, dynamic>> dataList,
    Config config,
    bool Function(Map<String, dynamic> treeNode, Config config)
    isNotRootNode) {
  Map obj = {};
  String? rootId;
  for (var v in dataList) {
    if (v.containsKey(config.id)) {
      v[config.id] = v[config.id].toString();
    }
    // 根节点
    if (v.containsKey(config.parentId)) {
      v[config.parentId] = v[config.parentId].toString();
      if (isNotRootNode(v, config)) {
        final parentId = v[config.parentId];
        if (obj[parentId] != null) {
          if (obj[parentId][config.children] != null) {
            obj[parentId][config.children].add(v);
          } else {
            obj[parentId][config.children] = [v];
          }
        } else {
          obj[parentId] = {
            config.children: [v],
          };
        }
      } else {
        rootId ??= v[config.id];
      }
    } else {
      rootId ??= v[config.id];
    }
    if (v.containsKey(config.id) && obj[v[config.id]] != null) {
      v[config.children] = obj[v[config.id]][config.children];
    }
    obj[v[config.id]] = v;
  }
  return obj[rootId] ?? {};
}