E2EEChat/lib/presenter/login.dart

import 'package:dio/dio.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';

import 'package:encrypt/encrypt.dart';

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

import '../objectbox.g.dart';
import 'profile.dart';

/*


  static Future<void> put(User user) async {
    debug('put user ${user.id} ${user.username}');
    final store = await openStore();
    final box = store.box<User>();
    box.put(user);
    store.close();
  }

  static Future<User?> query(String username) async {
    final store = await openStore();
    final box = store.box<User>();
    int id = 0;
    box.getAll().forEach((user) {
      if (user.username == username) id = user.id;
    });
    User? user = box.get(id);
    // Query<User> query = box.query(User_.username.equals(username)).build();
    // final user = query.findFirst();
    // query.close();
    debug('query user with username=$username get id=$id');
    store.close();
    return user;
  }
 */

class LoginPresenter extends ProfilePresenter {
  bool get isLogin => profile.isLogin;

  User? get user => profile.user;

  @Transient()
  Future<String?> get _secretKey async {
    if (user == null) return null;
    final storage = FlutterSecureStorage();
    String? _key = await storage.read(key: _keyKey);
    if (_key == null) {
      _key = Key.fromSecureRandom(256).base64;
      await storage.write(key: _keyKey, value: _key);
    }
    return _key;
  }

  String get _keyKey => "e2ee_chat secret key of ${user!.username}";

  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;
        // await User.put(profile.user!);
        profile.setToken(_token);
        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;
  }
}