Hibok/lib/models/unread_count_provider.dart

import 'package:chat/data/constants.dart';
import 'package:chat/utils/MessageMgr.dart';
import 'package:chat/utils/sp_utils.dart';

class UnreadCountProvider {
//未读消息条数管理
  Map<int, int> unreadCountMap = {};

//是否有@我的消息
  Map<int, int> isHaveAlterme = {};

  updateUnreadCount(int sessionId, int count) {
    if (unreadCountMap[sessionId] == null) {
      unreadCountMap[sessionId] = 0;
    }
    unreadCountMap[sessionId] += count;

    MessageMgr().emit('Update UnreadCount', sessionId);
  }

  initUnreadAlter() async {
    //初始化@消息
    List<String> alterList = await SPUtils.getStringList(Constants.GroupAlterKey) ?? [];
    for (int i = 0; i < alterList.length; i++) {
      var list = alterList[i].split('-');
      if (list.length == 2) {
        isHaveAlterme[int.parse(list[0])] = int.parse(list[1]);
      }
    }
  }

  getHavaAltertime(int sessionId) {
    return isHaveAlterme[sessionId] ?? null;
  }

  setAlterMe(int sessionId, int time) {
    if (isHaveAlterme[sessionId] == null) {
      isHaveAlterme[sessionId] = time;
      saveGroupAlterToLocal();
    }
  }

  saveGroupAlterToLocal() {
    List<String> alterList = [];
    isHaveAlterme.forEach((k, v) {
      if (v != null) {
        alterList.add('$k-$v');
      }
    });
    SPUtils.saveList(Constants.GroupAlterKey, alterList);
  }

  signUnreadAlter(int sessionId) {
    isHaveAlterme[sessionId] = null;
    saveGroupAlterToLocal();
  }

  clear() {
    unreadCountMap.clear();
  }

  int getUnreadCount(int sessionId) {
    return unreadCountMap[sessionId] ?? 0;
  }

  bool checkUnreadMsg() {
    for (var v in unreadCountMap.values) {
      if (v > 0) {
        return true;
      }
    }
    return false;
  }

  signRead(int sessionId) {
    print('消除未读标记:$sessionId');

    int count = getUnreadCount(sessionId);
    signUnreadAlter(sessionId);
    if (count > 0) {
      unreadCountMap[sessionId] = 0;

      MessageMgr().emit('Update UnreadCount', sessionId);
    }
  }
}