E2EEChat/lib/presenter/session.dart

import 'package:e2ee_chat/common/global.dart';
import 'package:e2ee_chat/model/message.dart';
import 'package:e2ee_chat/model/user.dart';
import 'package:flutter/cupertino.dart';

import 'login.dart';

enum DTMessageType { text, image }

class SessionListModel extends ChangeNotifier {
  User? get user => LoginPresenter().user;

  List<SessionModel> get sessions {
    final _user = user;
    var list = <SessionModel>[];
    if (_user != null) {
      var friends = _user.friends;
      for (var i in friends) {
        list.add(SessionModel(i));
      }
    }
    return list;
  }

  int get count => sessions.length;
}

class SessionModel extends SessionListModel {
  // TODO: 仅支持单聊

  SessionModel(this.contact);

  final User contact;

  /// 消息体
  Message? get lastMessage {
    final _user = user;
    Message? message;
    if (_user != null) {
      try {
        message = _user.messages.lastWhere((msg) => msg.from.target == _user || msg.to.target == _user);
      } catch (e) {
        debug("no message");
      }
    }
    return message;
  }

  /// 未读数量
  int get unReadCount {
    // TODO: 未读消息数量
    return 0;
  }

  get chatName => contact.username;

  /// 单聊
  get isSingle => true;

  /// 群聊信息
  get isGroup => false;

  /// 消息免打扰
  get isDND => contact.isDND;

  /// 是否为置顶
  get isStick => contact.isStick;

  /// 特别关注
  get isSpecialAttention => contact.isSpecialAttention;

  // TODO: 是否 @ 你
  get isAtYou => false;

  // TODO: 是否 @ 全部
  get isAtAll => false;

  // TODO: user avatar
  get avatar => Global.defaultAvatar;
}