shared_prefs_helper.dart

import 'dart:convert';

import 'package:durt/durt.dart';
import 'package:flutter/foundation.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'data/models/cesium_card.dart';
import 'data/models/credit_card_themes.dart';
import 'g1/g1_helper.dart';
import 'ui/logger.dart';

class SharedPreferencesHelper with ChangeNotifier {
  factory SharedPreferencesHelper() {
    return _instance;
  }

  SharedPreferencesHelper._internal() {
    SharedPreferences.getInstance().then((SharedPreferences value) {
      _prefs = value;
    });
  }

  List<CesiumCard> cesiumCards = <CesiumCard>[];

  Map<String, CesiumWallet> cesiumVolatileCards = <String, CesiumWallet>{};

  static final SharedPreferencesHelper _instance =
      SharedPreferencesHelper._internal();

  late SharedPreferences _prefs;

  static const String _seedKey = 'seed';
  static const String _pubKey = 'pub';

  Future<void> init() async {
    _prefs = await SharedPreferences.getInstance();

    final String? json = _prefs.getString('cesiumCards');
    if (json != null) {
      final List<dynamic> list = jsonDecode(json) as List<dynamic>;
      cesiumCards = list
          .map((dynamic e) => CesiumCard.fromJson(e as Map<String, dynamic>))
          .toList();
    }

    // Migrate the current pair if exists
    await migrateCurrentPair();
  }

  Future<void> migrateCurrentPair() async {
    if (_prefs.containsKey(_seedKey) &&
        _prefs.containsKey(_pubKey) &&
        cesiumCards.isEmpty) {
      final String seed = _prefs.getString(_seedKey)!;
      final String pubKey = _prefs.getString(_pubKey)!;
      final CesiumCard card = buildCesiumCard(seed: seed, pubKey: pubKey);
      addCesiumCard(card);
      // Let's do this later
      await _prefs.remove(_seedKey);
      await _prefs.remove(_pubKey);
      setCurrentWalletIndex(0);
    }
  }

  CesiumCard buildCesiumCard({required String seed, required String pubKey}) {
    return CesiumCard(
        seed: seed, pubKey: pubKey, theme: CreditCardThemes.theme1, name: '');
  }

  void addCesiumCard(CesiumCard cesiumCard) {