set deep map in dart

set_deep.dart

void main() async {
  Map<String, dynamic> setDeep(
    Map<String, dynamic> data, {
    required String path,
    required dynamic value,
    String separator = '.',
  }) {
    final keys = path.split(separator);
    Map<String, dynamic> current = data;

    for (int i = 0; i < keys.length; i++) {
      final key = keys[i];

      if (i == keys.length - 1) {
        current[key] = value;
      } else {
        if (current[key] == null || current[key] is! Map) {
          current[key] = <String, dynamic>{};
        }
        current = current[key] as Map<String, dynamic>;
      }
    }

    return data;
  }

  try {
    Map<String, dynamic> data = {"name": "Bekzod"};
    data['phone'] = "+998946153095";
    setDeep(data, path: 'file.some.field.value', value: 'file name');
    print(data);
  } catch (e) {
    print('error');
    print(e);
  }
}