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RecoverWalletViewModel.cs
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RecoverWalletViewModel.cs
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using Avalonia.Threading;
using AvalonStudio.Extensibility;
using AvalonStudio.Shell;
using NBitcoin;
using ReactiveUI;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using WalletWasabi.Gui.ViewModels;
using WalletWasabi.Helpers;
using WalletWasabi.KeyManagement;
using WalletWasabi.Logging;
namespace WalletWasabi.Gui.Tabs.WalletManager
{
internal class RecoverWalletViewModel : CategoryViewModel
{
private string _password;
private string _mnemonicWords;
private string _walletName;
private bool _termsAccepted;
private string _validationMessage;
private ObservableCollection<MnemonicViewModel> _suggestions;
public RecoverWalletViewModel(WalletManagerViewModel owner) : base("Recover Wallet")
{
RecoverCommand = ReactiveCommand.Create(() =>
{
WalletName = Guard.Correct(WalletName);
MnemonicWords = Guard.Correct(MnemonicWords);
Password = Guard.Correct(Password); // Don't let whitespaces to the beginning and to the end.
string walletFilePath = Path.Combine(Global.WalletsDir, $"{WalletName}.json");
if (TermsAccepted == false)
{
ValidationMessage = "Terms are not accepted.";
}
else if (string.IsNullOrWhiteSpace(WalletName))
{
ValidationMessage = $"The name {WalletName} is not valid.";
}
else if (File.Exists(walletFilePath))
{
ValidationMessage = $"The name {WalletName} is already taken.";
}
else if (string.IsNullOrWhiteSpace(MnemonicWords))
{
ValidationMessage = $"Mnemonic words were not supplied.";
}
else
{
try
{
var mnemonic = new Mnemonic(MnemonicWords);
KeyManager.Recover(mnemonic, Password, walletFilePath);
owner.SelectLoadWallet();
}
catch (Exception ex)
{
ValidationMessage = ex.ToTypeMessageString();
Logger.LogError<LoadWalletViewModel>(ex);
}
}
},
this.WhenAnyValue(x => x.TermsAccepted));
this.WhenAnyValue(x => x.MnemonicWords).Subscribe(x => UpdateSuggestions(x));
this.WhenAnyValue(x => x.Password).Subscribe(x =>
{
if (x.NotNullAndNotEmpty())
{
char lastChar = x.Last();
if (lastChar == '\r' || lastChar == '\n') // If the last character is cr or lf then act like it'd be a sign to do the job.
{
Password = x.TrimEnd('\r', '\n');
}
}
});
_suggestions = new ObservableCollection<MnemonicViewModel>();
}
public string Password
{
get { return _password; }
set { this.RaiseAndSetIfChanged(ref _password, value); }
}
public string MnemonicWords
{
get { return _mnemonicWords; }
set { this.RaiseAndSetIfChanged(ref _mnemonicWords, value); }
}
public ObservableCollection<MnemonicViewModel> Suggestions
{
get { return _suggestions; }
set { this.RaiseAndSetIfChanged(ref _suggestions, value); }
}
public string WalletName
{
get { return _walletName; }
set { this.RaiseAndSetIfChanged(ref _walletName, value); }
}
public bool TermsAccepted
{
get { return _termsAccepted; }
set { this.RaiseAndSetIfChanged(ref _termsAccepted, value); }
}
public string ValidationMessage
{
get { return _validationMessage; }
set { this.RaiseAndSetIfChanged(ref _validationMessage, value); }
}
public ReactiveCommand RecoverCommand { get; }
public void OnTermsClicked()
{
IoC.Get<IShell>().AddOrSelectDocument(() => new TermsAndConditionsViewModel());
}
public void OnPrivacyClicked()
{
IoC.Get<IShell>().AddOrSelectDocument(() => new PrivacyPolicyViewModel());
}
public void OnLegalClicked()
{
IoC.Get<IShell>().AddOrSelectDocument(() => new LegalIssuesViewModel());
}
public override void OnCategorySelected()
{
base.OnCategorySelected();
Password = null;
MnemonicWords = null;
WalletName = Utils.GetNextWalletName();
TermsAccepted = false;
ValidationMessage = null;
}
private void UpdateSuggestions(string words)
{
if (string.IsNullOrEmpty(words))
return;
string[] enteredWordList = words.Split(' ', StringSplitOptions.RemoveEmptyEntries);
var lastWorld = enteredWordList.LastOrDefault().Replace("\t", "");
if (lastWorld.Length < 1)
{
_suggestions.Clear();
return;
}
var suggestedWords = EnglishWords.Where(w => w.StartsWith(lastWorld));
_suggestions.Clear();
foreach(var suggestion in suggestedWords)
{
_suggestions.Add(new MnemonicViewModel(suggestion, OnAddWord));
}
}
public void OnAddWord(string word)
{
string[] words = MnemonicWords.Split(' ', StringSplitOptions.RemoveEmptyEntries);
words[words.Length-1] = word;
MnemonicWords = string.Join(' ', words) + " ";
Task.Delay(50).ContinueWith(x=>
Dispatcher.UIThread.InvokeAsync(()=>_suggestions.Clear()));
}
private static IEnumerable<string> EnglishWords = Wordlist.English.GetWords();
}
}