E2EEChat/lib/presenter/login.dart

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

import 'package:e2ee_chat/common/global.dart';
import 'package:e2ee_chat/common/api.dart';
import '../model/user.dart';

import 'profile.dart';

class LoginModel extends ProfileChangeNotifier {

  // TODO: online keep status; A logout, B logout?
  bool get isLogin => profile.isLogin;

  User? get user => profile.user;

  Future<bool> login({String? username, String? password}) async {
    debug('UserModel login begin');
    if (username != null) {
      profile.user = User(username);
    }
    bool _result = false;
    String? token = await profile.token;
    if (profile.username != null && (password != null || token != null)) {
      String? _token;
      try {
        _token = await Api().login(username: profile.username!, password: password, token: token);
        _result = _token != null;
      } on DioError catch(e) {
        print(e);
      }
      profile.setToken(_token);
      debug('UserModel login get token: ${await profile.token}');
      if (await profile.token != null) {
        debug('UserModel login success!');
        profile.isLogin = true;
        profile.isLogout = false;
        notifyListeners();
      }
    }
    debug('UserModel login end');
    return _result;
  }

  Future<void> logout() async {
    if (profile.isLogin && await Api().logout()) {
      profile.isLogin = false;
      profile.isLogout = true;
      notifyListeners();
    }
  }

  Future<bool> loginOrRegister(String username, String password) async {
    if (await login(username: username, password: password)) {
      return true;
    } else if (await Api().register(username, password)) {
      return await login(username: username, password: password);
    }
    return false;
  }
}