private void BeginBackup(Uri uri)
{
var fragment = new BackupPasswordBottomSheet(BackupPasswordBottomSheet.Mode.Backup);
fragment.PasswordEntered += async(sender, password) =>
{
try
{
await DoBackup(uri, password);
}
catch (Exception)
{
ShowSnackbar(Resource.String.filePickError, Snackbar.LengthShort);
}
PreferenceManager.GetDefaultSharedPreferences(this)
.Edit()
.PutBoolean("needsBackup", false)
.Commit();
((BackupPasswordBottomSheet)sender).Dismiss();
ShowSnackbar(Resource.String.saveSuccess, Snackbar.LengthLong);
};
fragment.Cancel += (sender, _) =>
{
// TODO: Delete empty file only if we just created it
// DocumentsContract.DeleteDocument(ContentResolver, uri);
((BackupPasswordBottomSheet)sender).Dismiss();
};
fragment.Show(SupportFragmentManager, fragment.Tag);
}
private async Task BeginRestore(Uri uri)
{
MemoryStream memoryStream = null;
Stream stream = null;
byte[] fileData;
try
{
stream = ContentResolver.OpenInputStream(uri);
memoryStream = new MemoryStream();
await stream.CopyToAsync(memoryStream);
fileData = memoryStream.ToArray();
}
catch (Exception)
{
ShowSnackbar(Resource.String.filePickError, Snackbar.LengthShort);
return;
}
finally
{
memoryStream?.Close();
stream?.Close();
}
if (fileData.Length == 0)
{
ShowSnackbar(Resource.String.invalidFileError, Snackbar.LengthShort);
return;
}
async Task TryRestore(string password, BackupPasswordBottomSheet sheet)
{
int authCount, categoryCount;
try
{
(authCount, categoryCount) = await DoRestore(fileData, password);
}
catch (InvalidAuthenticatorException)
{
sheet?.Dismiss();
ShowSnackbar(Resource.String.invalidFileError, Snackbar.LengthShort);
return;
}
catch (Exception)
{
if (sheet != null)
{
sheet.Error = GetString(Resource.String.restoreError);
}
else
{
ShowSnackbar(Resource.String.restoreError, Snackbar.LengthShort);
}
return;
}
sheet?.Dismiss();
await _customIconSource.Update();
await _authSource.Update();
// This is required because we're probably not running on the main thread
// as the method was called from a task
RunOnUiThread(async() =>
{
CheckEmptyState();
await RefreshAuthenticators(true);
});
await _categorySource.Update();
var message = String.Format(GetString(Resource.String.restoredFromBackup), authCount, categoryCount);
ShowSnackbar(message, Snackbar.LengthLong);
await NotifyWearAppOfChange();
}
// Open and closed curly brace (file is not encrypted)
if (fileData[0] == 0x7b && fileData[^ 1] == 0x7d)
{
await TryRestore(null, null);
return;
}
var fragment = new BackupPasswordBottomSheet(BackupPasswordBottomSheet.Mode.Restore);
fragment.PasswordEntered += async(sender, password) =>
{
await TryRestore(password, fragment);
};
fragment.Cancel += delegate
{
fragment.Dismiss();
};
fragment.Show(SupportFragmentManager, fragment.Tag);
}