private async Task <RestoreResult> RestoreFromDir(Uri destUri)
{
if (!HasPersistablePermissionsAtUri(destUri))
{
throw new Exception("No permission at URI");
}
var directory = DocumentFile.FromTreeUri(_context, destUri);
var files = directory.ListFiles();
var mostRecentBackup = files
.Where(f => f.IsFile && f.Type == Backup.MimeType && f.Name.EndsWith(Backup.FileExtension) && f.Length() > 0 && f.CanRead())
.OrderByDescending(f => f.LastModified())
.FirstOrDefault();
if (mostRecentBackup == null || mostRecentBackup.LastModified() <= _preferences.MostRecentBackupModifiedAt)
{
return(new RestoreResult());
}
_preferences.MostRecentBackupModifiedAt = mostRecentBackup.LastModified();
var password = await SecureStorageWrapper.GetAutoBackupPassword();
if (password == null)
{
throw new Exception("No password defined.");
}
var data = await FileUtil.ReadFile(_context, mostRecentBackup.Uri);
var backup = Backup.FromBytes(data, password);
var(authsAdded, authsUpdated) = await _authSource.AddOrUpdateMany(backup.Authenticators);
var categoriesAdded = backup.Categories != null
? await _categorySource.AddMany(backup.Categories)
: 0;
if (backup.AuthenticatorCategories != null)
{
await _authSource.AddOrUpdateManyCategoryBindings(backup.AuthenticatorCategories);
}
var customIconsAdded = backup.CustomIcons != null
? await _customIconSource.AddMany(backup.CustomIcons)
: 0;
try
{
await _customIconSource.CullUnused();
}
catch (Exception e)
{
// ignored
Logger.Error(e);
}
return(new RestoreResult(authsAdded, authsUpdated, categoriesAdded, customIconsAdded));
}
private async Task <string> GetBackupPassword()
{
if (_preferences.DatabasePasswordBackup)
{
return(await SecureStorageWrapper.GetDatabasePassword());
}
return(await SecureStorageWrapper.GetAutoBackupPassword());
}
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));
}