getSelectionParams function

Implementation

Map<String, String> getSelectionParams(
    List<TSelectionEntity>? selectedResults) {
  Map<String, String> params = {};
  if (selectedResults == null) return params;
  for (TSelectionEntity menuItemEntity in selectedResults) {
    if (menuItemEntity.filterType == TSelectionFilterType.more) {
      params.addAll(getSelectionParams(menuItemEntity.children));
    } else {
      /// 1、首先找出 自定义范围的筛选项参数。
      TSelectionEntity? selectedCustomInputItem =
          SelectionUtil.getFilledCustomInputItem(menuItemEntity.children);
      if (selectedCustomInputItem != null &&
          !SelectionUtil.isEmpty(selectedCustomInputItem.customMap)) {
        String? key = selectedCustomInputItem.parent?.key;
        if (!SelectionUtil.isEmpty(key)) {
          params[key!] = '${selectedCustomInputItem.customMap!["min"] ?? ''}:${selectedCustomInputItem.customMap!["max"] ?? ''}';
        }
      }

      /// 2、一次找出层级为 1、2、3 的选中项的参数，递归不好阅读，直接写成 for 嵌套遍历。
      int levelCount = SelectionUtil.getTotalLevel(menuItemEntity);
      if (levelCount == 1) {
        params.addAll(getCurrentSelectionEntityParams(menuItemEntity));
      } else if (levelCount == 2) {
        params.addAll(getCurrentSelectionEntityParams(menuItemEntity));
        for (var firstLevelItem in menuItemEntity.children) {
          params.addAll(getCurrentSelectionEntityParams(firstLevelItem));
        }
      } else if (levelCount == 3) {
        params.addAll(getCurrentSelectionEntityParams(menuItemEntity));
        for (var firstLevelItem in menuItemEntity.children) {
          params.addAll(getCurrentSelectionEntityParams(firstLevelItem));
          for (var secondLevelItem in firstLevelItem.children) {
            params.addAll(getCurrentSelectionEntityParams(secondLevelItem));
          }
        }
      }
    }
  }
  return params;
}