toTitleSegments method

List<String> toTitleSegments(DJson data)

Implementation

List<String> toTitleSegments(DJson data) {
  final List<String> titleSegments = [];
  for (int i = 0; i < length; i++) {
    final TitleField titleField = this[i];
    final bool isLast = i == length - 1;
    final bool isFirst = i == 0;
    TitleField? prevField = isFirst ? null : this[i - 1];
    TitleField? nextField = isLast ? null : this[i + 1];
    if (prevField != null && prevField.isNotValid) {
      prevField = null;
    }
    if (nextField != null && nextField.isNotValid) {
      nextField = null;
    }
    if (titleField.isNotValid) {
      continue;
    }
    if (titleField is FieldsDecorator) {
      titleSegments.add(titleField.strictValue);
    } else if (titleField is FieldsDivider) {
      if (prevField != null && prevField is ExternalField && nextField != null && nextField is ExternalField) {
        titleSegments.add(titleField.strictValue);
      }
    } else if (titleField is ExternalField) {
      final Object? value = data[titleField.strictValue];
      if (prevField != null && prevField is ExternalField) {
        /// ? Default divider if there are no one [FieldsDivider] between [ExternalField]s
        titleSegments.add(' ');
      }
      if (value == null) {
        titleSegments.add('null');
      } else if (value is String || value is num || value is bool) {
        titleSegments.add(value.toString());
      } else {
        titleSegments.add('Object(${value.runtimeType})');
      }
    }
  }
  return titleSegments;
}