83 lines
2.6 KiB
Dart
83 lines
2.6 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'package:crypto/crypto.dart';
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import 'package:firebase_messaging/firebase_messaging.dart';
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import 'package:flutter/cupertino.dart';
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import 'package:provider/provider.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'accountModel.dart';
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class AccountData {
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static const _usernameField = 'username';
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static const _passwordField = 'password';
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static final AccountData _instance = AccountData._construct();
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final Future<SharedPreferences> _storage = SharedPreferences.getInstance();
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Completer<void> _populated = Completer();
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factory AccountData() => _instance;
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AccountData._construct() {
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_updateFromStorage();
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}
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String? _username;
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String? _password;
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String getUsername() {
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if(_username == null) throw Exception('Username not initialized');
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return _username!;
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}
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String getPassword() {
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if(_password == null) throw Exception('Password not initialized');
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return _password!;
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}
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String getUserSecret() => sha512.convert(utf8.encode('${AccountData().getUsername()}:${AccountData().getPassword()}')).toString();
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Future<String> getDeviceId() async => sha512.convert(utf8.encode('${getUserSecret()}@${await FirebaseMessaging.instance.getToken()}')).toString();
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Future<void> setData(String username, String password) async {
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var storage = await _storage;
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storage.setString(_usernameField, username);
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storage.setString(_passwordField, password);
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await _updateFromStorage();
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}
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Future<void> removeData({BuildContext? context}) async {
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_populated = Completer();
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if(context != null) Provider.of<AccountModel>(context, listen: false).setState(AccountModelState.loggedOut);
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var storage = await _storage;
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await storage.remove(_usernameField);
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await storage.remove(_passwordField);
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}
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Future<void> _updateFromStorage() async {
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var storage = await _storage;
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//await storage.reload(); // This line was the cause of the first rejected google play upload :(
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if(storage.containsKey(_usernameField) && storage.containsKey(_passwordField)) {
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_username = storage.getString(_usernameField);
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_password = storage.getString(_passwordField);
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}
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if(!_populated.isCompleted) _populated.complete();
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}
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Future<bool> waitForPopulation() async {
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await _populated.future;
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return isPopulated();
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}
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bool isPopulated() => _username != null && _password != null;
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String buildHttpAuthString() {
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if(!isPopulated()) throw Exception('AccountData (e.g. username or password) is not initialized!');
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return '$_username:$_password';
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}
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}
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