fetchUserList method

@override Future<List<ContactInfo>> fetchUserList(List<String> accIdList)

根据accIdList 批量获取用户信息 优先从缓存获取，失败则从服务端获取 不走数据库

Implementation

@override
Future<List<ContactInfo>> fetchUserList(List<String> accIdList) async {
  final List<String> fetchList =
      accIdList.where((element) => contactMap[element] == null).toList();

  if (fetchList.isNotEmpty) {
    int start = 0;
    int end = fetchList.length > 150 ? 150 : fetchList.length;
    while (start < fetchList.length) {
      final fetchResult = await NimCore.instance.userService
          .fetchUserInfoList(fetchList.sublist(start, end));
      if (fetchResult.isSuccess && fetchResult.data != null) {
        for (var e in fetchResult.data!) {
          contactMap[e.userId!] = ContactInfo(e);
        }
      }
      start = end;
      end = start + 150;
      if (end > fetchList.length) {
        end = fetchList.length;
      }
    }
  }

  return accIdList.map((e) => contactMap[e]!).toList();
}