/// <inheritdoc/>
public RepositoryStorageLoadResult LoadRepositoryOrDefault(out NoteRepositoryModel repositoryModel)
{
if (_cachedRepository != null)
{
repositoryModel = _cachedRepository;
return(RepositoryStorageLoadResult.SuccessfullyLoaded);
}
RepositoryStorageLoadResult result;
repositoryModel = null;
bool modelWasUpdated = false;
try
{
// A new repository is created only if it does not yet exist, we won't overwrite
// an invalid repository.
if (RepositoryExists())
{
string xmlFilePath = Path.Combine(GetDirectoryPath(), Config.RepositoryFileName);
if (!_xmlFileService.TryLoad(xmlFilePath, out XDocument xml))
{
throw new Exception("Invalid XML");
}
result = RepositoryStorageLoadResult.SuccessfullyLoaded;
modelWasUpdated = _updater.Update(xml);
repositoryModel = XmlUtils.DeserializeFromXmlDocument <NoteRepositoryModel>(xml);
}
else
{
result = RepositoryStorageLoadResult.CreatedNewEmptyRepository;
repositoryModel = new NoteRepositoryModel();
repositoryModel.Revision = NoteRepositoryModel.NewestSupportedRevision;
AddWelcomeNote(repositoryModel);
modelWasUpdated = true;
}
}
catch (Exception)
{
result = RepositoryStorageLoadResult.InvalidRepository;
repositoryModel = null;
modelWasUpdated = false;
}
// Automatically save settings if they where modified by an update
if (modelWasUpdated)
{
TrySaveRepository(repositoryModel);
}
_cachedRepository = repositoryModel;
return(result);
}
/// <inheritdoc/>
public override async Task Run()
{
try
{
SettingsModel settings = _settingsService.LoadSettingsOrDefault();
byte[] binaryCloudRepository = StoryBoard.LoadFromSession <byte[]>(SynchronizationStorySessionKey.BinaryCloudRepository);
// Try to decode with all possible transfer codes
bool successfullyDecryptedRepository = TryDecryptWithAllTransferCodes(
settings, binaryCloudRepository, out byte[] decryptedRepository);
if (successfullyDecryptedRepository)
{
// Deserialize and update repository
XDocument cloudRepositoryXml = XmlUtils.LoadFromXmlBytes(decryptedRepository);
if (_noteRepositoryUpdater.IsTooNewForThisApp(cloudRepositoryXml))
{
throw new SynchronizationStoryBoard.UnsuportedRepositoryRevisionException();
}
_noteRepositoryUpdater.Update(cloudRepositoryXml);
NoteRepositoryModel cloudRepository = XmlUtils.DeserializeFromXmlDocument <NoteRepositoryModel>(cloudRepositoryXml);
// Continue with next step
StoryBoard.StoreToSession(SynchronizationStorySessionKey.CloudRepository, cloudRepository);
await StoryBoard.ContinueWith(SynchronizationStoryStepId.IsSameRepository);
}
else
{
bool existsUserEnteredTransferCode = StoryBoard.TryLoadFromSession <string>(SynchronizationStorySessionKey.UserEnteredTransferCode, out _);
if (existsUserEnteredTransferCode)
{
// Keep transfercode page open and show message
_feedbackService.ShowToast(_languageService["sync_error_transfercode"]);
}
else
{
// Open transfercode page
await StoryBoard.ContinueWith(SynchronizationStoryStepId.ShowTransferCode);
}
}
}
catch (Exception ex)
{
// Keep the current page open and show the error message
ShowExceptionMessage(ex, _feedbackService, _languageService);
}
}
/// <inheritdoc/>
public override async Task Run()
{
try
{
SettingsModel settings = _settingsService.LoadSettingsOrDefault();
byte[] binaryCloudRepository = StoryBoard.LoadFromSession <byte[]>(SynchronizationStorySessionKey.BinaryCloudRepository.ToInt());
List <string> transferCodesToTry = ListTransferCodesToTry(settings);
// Try to decode with all possible transfer codes
EncryptorDecryptor encryptor = new EncryptorDecryptor("SilentNotes");
byte[] decryptedRepository = null;
bool successfullyDecryptedRepository = false;
int index = 0;
while (!successfullyDecryptedRepository && index < transferCodesToTry.Count)
{
string transferCodeCandidate = transferCodesToTry[index];
successfullyDecryptedRepository = TryDecryptRepositoryWithTransfercode(encryptor, binaryCloudRepository, transferCodeCandidate, out decryptedRepository);
if (successfullyDecryptedRepository)
{
// Store transfercode and encryption mode if necessary
if (AdoptTransferCode(settings, transferCodeCandidate) ||
AdoptEncryptionMode(settings, encryptor, binaryCloudRepository))
{
_settingsService.TrySaveSettingsToLocalDevice(settings);
}
}
index++;
}
if (successfullyDecryptedRepository)
{
// Deserialize and update repository
XDocument cloudRepositoryXml = XmlUtils.LoadFromXmlBytes(decryptedRepository);
if (_noteRepositoryUpdater.IsTooNewForThisApp(cloudRepositoryXml))
{
throw new SynchronizationStoryBoard.UnsuportedRepositoryRevisionException();
}
_noteRepositoryUpdater.Update(cloudRepositoryXml);
NoteRepositoryModel cloudRepository = XmlUtils.DeserializeFromXmlDocument <NoteRepositoryModel>(cloudRepositoryXml);
// Continue with next step
StoryBoard.StoreToSession(SynchronizationStorySessionKey.CloudRepository.ToInt(), cloudRepository);
await StoryBoard.ContinueWith(SynchronizationStoryStepId.IsSameRepository.ToInt());
}
else
{
bool existsUserEnteredTransferCode = StoryBoard.TryLoadFromSession <string>(SynchronizationStorySessionKey.UserEnteredTransferCode.ToInt(), out _);
if (existsUserEnteredTransferCode)
{
// Keep transfercode page open and show message
_feedbackService.ShowToast(_languageService["sync_error_transfercode"]);
}
else
{
// Open transfercode page
await StoryBoard.ContinueWith(SynchronizationStoryStepId.ShowTransferCode.ToInt());
}
}
}
catch (Exception ex)
{
// Keep the current page open and show the error message
ShowExceptionMessage(ex, _feedbackService, _languageService);
}
}