app-zj/lib/service/dict_service.dart

import 'package:lszlgl/model/rsp/dict_rsp.dart';

enum DictType {
  /// 监测类别
  jclb('jclb');

  const DictType(this.type);

  final String type;
}

class DictService {
  DictService._();

  static DictService? _instance;

  static DictService get() => _instance ??= DictService._();

  List<DictRsp>? _dictList;

  List<DictRsp> get dictList => _dictList ??= [];

  final Map<String, Map<String, DictRsp>> _dictMap = {};

  void saveDictList(List<DictRsp>? list) {
    if (list == null) return;
    _dictList = list;
    // 按类型存储字典
    _dictMap.clear();
    for (DictRsp dict in list) {
      if (dict.dictType == null || dict.value == null) continue;
      Map<String, DictRsp> map = _dictMap[dict.dictType!] ??= {};
      map[dict.value!] = dict;
    }
  }

  DictRsp? getLabel(DictType type, {num? value, String? valueStr}) {
    String? v;
    if (valueStr == null) {
      if (value == null) return null;
      v = value.toString();
    } else {
      v = valueStr;
    }
    return _dictMap[type.type]?[v];
  }
}