home.dart

import 'dart:collection';
import 'dart:convert';
import 'dart:io';
import 'dart:math';
import 'package:audioplayers/audio_cache.dart';
import 'package:audioplayers/audioplayers.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'dart:async';
import 'package:gecko/globals.dart';
import 'package:gecko/screens/history.dart';
import 'package:gecko/screens/myWallets/walletsHome.dart';
import 'package:graphql_flutter/graphql_flutter.dart';
import 'package:package_info/package_info.dart';
import 'package:path_provider/path_provider.dart';

class HomeProvider with ChangeNotifier {
  int _currentIndex = 0;
  bool isSearching;
  Icon searchIcon = Icon(Icons.search);
  final TextEditingController searchQuery = new TextEditingController();
  Widget appBarTitle = Text('Ğecko', style: TextStyle(color: Colors.grey[850]));
  Widget appBarExplorer =
      Text('Explorateur', style: TextStyle(color: Colors.grey[850]));

  List currentTab = [HistoryScreen(), WalletsHome()];
  AudioCache player = AudioCache(prefix: 'sounds/');

  get currentIndex => _currentIndex;

  set currentIndex(int index) {
    _currentIndex = index;
    notifyListeners();
  }

  Future<String> getAppVersion() async {
    String version;
    String buildNumber;
    if (Platform.isLinux) {
      version = "undefined";
      buildNumber = "undefined";
    } else {
      PackageInfo packageInfo = await PackageInfo.fromPlatform();
      version = packageInfo.version;
      buildNumber = packageInfo.buildNumber;
    }

    notifyListeners();
    return version + '+' + buildNumber;
  }

  Future<List<String>> scanNetwork() async {
    // TODO: return all known endpoints from current window
    // - Request all bootstrap endpoints to get theres current bloc number and hash (blockstamps), and theres known endpoinds
    // - Store them in an ordered Map (SplayTreeMap<Blockstamp, HashSet<String>>) (the HashSet is a endpoint)
    // - Request 5 randoms endpoints known by the last slave, only theses we don't even know
    // - Do it 3 times
    // - We iterate the Map to determinat the consensus with for loop, intinital consensus variable to null
    // - if consensus == null -> if blockstamp > (1/3 known endpoints) -> consensus = blockstamp
    // - elif blockstamp.number == consensus.number && blockstamp.endpointNumbers > consensus.endpointNumbers -> consensus = blockstamp
    // - else break;
    // - return map.get(key: consensus).toList

    var blockstampMap = SplayTreeMap<Blockstamp, List<String>>();

    List _endpointsToScan = [];
    _endpointsToScan = await rootBundle
        .loadString('config/gva_endpoints.json')
        .then((jsonStr) => jsonDecode(jsonStr));