private async Task DoBackup(Uri uri, string password)
{
var backup = new Backup(
_authSource.GetAll(),
_categorySource.GetAll(),
_authSource.CategoryBindings,
_customIconSource.GetAll()
);
var dataToWrite = backup.ToBytes(password);
// This is the only way of reliably writing files using SAF on Xamarin.
// A file output stream will usually create 0 byte files on virtual storage such as Google Drive
var output = ContentResolver.OpenOutputStream(uri, "rwt");
var dataStream = new DataOutputStream(output);
try
{
await dataStream.WriteAsync(dataToWrite);
await dataStream.FlushAsync();
}
finally
{
dataStream.Close();
output.Close();
}
}
private async Task <BackupResult> BackupToDir(Uri destUri)
{
if (!_authSource.GetAll().Any())
{
return(new BackupResult());
}
if (!HasPersistablePermissionsAtUri(destUri))
{
throw new Exception("No permission at URI");
}
var password = await SecureStorageWrapper.GetAutoBackupPassword();
if (password == null)
{
throw new Exception("No password defined.");
}
var backup = new Backup(
_authSource.GetAll(),
_categorySource.GetAll(),
_authSource.CategoryBindings,
_customIconSource.GetAll()
);
var dataToWrite = backup.ToBytes(password);
var directory = DocumentFile.FromTreeUri(_context, destUri);
var file = directory.CreateFile(Backup.MimeType, $"backup-{DateTime.Now:yyyy-MM-dd_HHmmss}.{Backup.FileExtension}");
if (file == null)
{
throw new Exception("File creation failed, got null.");
}
await FileUtil.WriteFile(_context, file.Uri, dataToWrite);
return(new BackupResult(file.Name));
}
private async Task GetSyncBundle(string nodeId)
{
await _authSource.Update();
var auths = new List <WearAuthenticator>();
foreach (var auth in _authSource.GetView())
{
var bindings = _authSource.CategoryBindings
.Where(c => c.AuthenticatorSecret == auth.Secret)
.Select(c => new WearAuthenticatorCategory(c.CategoryId, c.Ranking))
.ToList();
var item = new WearAuthenticator(
auth.Type, auth.Secret, auth.Icon, auth.Issuer, auth.Username, auth.Period, auth.Digits, auth.Algorithm, auth.Ranking, bindings);
auths.Add(item);
}
await _categorySource.Update();
var categories = _categorySource.GetAll().Select(c => new WearCategory(c.Id, c.Name)).ToList();
await _customIconSource.Update();
var customIconIds = _customIconSource.GetAll().Select(i => i.Id).ToList();
var preferenceWrapper = new PreferenceWrapper(this);
var preferences = new WearPreferences(preferenceWrapper.DefaultCategory, preferenceWrapper.SortMode);
var bundle = new WearSyncBundle(auths, categories, customIconIds, preferences);
var json = JsonConvert.SerializeObject(bundle);
var data = Encoding.UTF8.GetBytes(json);
await WearableClass.GetMessageClient(this).SendMessageAsync(nodeId, GetSyncBundleCapability, data);
}
