/// <summary>
/// Initiate restoration of data from OneDrive.
/// <para>*Application restarts if finished successfully.</para>
/// </summary>
private async void RestoreFromOneDrive()
{
progressRing.IsActive = true;
try
{
// Request a token to sign in the user
var accessToken = await authProvider.GetAccessToken();
// Initialize Graph Client
GraphServiceHelper.InitializeClient(authProvider);
// Set current user (temp)
App.CurrentUser = await GraphServiceHelper.GetMeAsync();
// Find the backupFolder in OneDrive, if it exists
var backupFolder = await GraphServiceHelper.GetOneDriveFolderAsync("Kanban Tasker");
if (backupFolder != null)
{
// Restore local data file using the backup file, if it exists
await GraphServiceHelper.RestoreFileFromOneDriveAsync(backupFolder.Id, "ktdatabase.db");
await DisplayMessageAsync("Data restored successfully.");
var displayName = await GraphServiceHelper.GetMyDisplayNameAsync();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
txtResults.Text = "Welcome " + App.CurrentUser.GivenName;
btnSignOutTip.IsEnabled = true;
});
Thread.Sleep(2000);
// Restart app to make changes
await Windows.ApplicationModel.Core.CoreApplication.RequestRestartAsync("");
}
else
{
await DisplayMessageAsync("No backup folder found to restore from.");
}
}
catch (ServiceException ex)
{
if (ex.StatusCode == System.Net.HttpStatusCode.Unauthorized)
{
// MS Graph Known Error
// Users need to sign into OneDrive at least once
// https://docs.microsoft.com/en-us/graph/known-issues#files-onedrive
// Empty all cached accounts / data to allow user to rety
await authProvider.SignOut();
await DisplayMessageAsync("Error 401. Access Denied. Please make sure you've logged\ninto OneDrive and your email at least once then try again.");
}
else if (ex.StatusCode == HttpStatusCode.NotFound)
{
await DisplayMessageAsync("Error 404. Resource requested is not available.");
}
else if (ex.StatusCode == HttpStatusCode.Conflict)
{
await DisplayMessageAsync("Error 409. Error backing up, issue retrieving backup folder. Please try again.");
}
else if (ex.StatusCode == HttpStatusCode.BadGateway)
{
await DisplayMessageAsync("Error 502. Bad Gateway.\nPlease check your internet connection and try again in a few.");
}
else if (ex.StatusCode == HttpStatusCode.ServiceUnavailable)
{
await DisplayMessageAsync("Error 503. Service unavailable due to high load or maintenance.\nPlease try again in a few.");
}
else if (ex.IsMatch(GraphErrorCode.GeneralException.ToString()))
{
await DisplayMessageAsync("General Exception. Please check your internet connection and try again in a few.");
}
}
catch (MsalException msalex)
{
if (msalex.ErrorCode == MsalError.AuthenticationCanceledError)
{
await DisplayMessageAsync(msalex.Message);
}
else if (msalex.ErrorCode == MsalError.InvalidGrantError)
{
// invalid_grant comes from no consent to needed scopes
await DisplayMessageAsync("Invalid access scopes, please contact the developer.");
}
}
catch (Exception ex)
{
await DisplayMessageAsync("Unexpected Error: " + ex.Message);
}
finally
{
progressRing.IsActive = false;
}
}
/// <summary>
/// Initiate backup of data to OneDrive.
/// </summary>
private async void BackupToOneDrive()
{
progressRing.IsActive = true;
try
{
// Request a token to sign in the user
var accessToken = await authProvider.GetAccessToken();
// Initialize Graph Client
GraphServiceHelper.InitializeClient(authProvider);
// Set current user (temp)
App.CurrentUser = await GraphServiceHelper.GetMeAsync();
// Find backupFolder in user's OneDrive, if it exists
var backupFolder = await GraphServiceHelper.GetOneDriveFolderAsync("Kanban Tasker");
// Create backup folder in OneDrive if not exists
if (backupFolder == null)
{
backupFolder = await GraphServiceHelper.CreateNewOneDriveFolderAsync("Kanban Tasker") as DriveItem;
}
// Backup datafile (or overwrite)
var uploadedFile = await GraphServiceHelper.UploadFileToOneDriveAsync(backupFolder.Id, DataFilename);
await DisplayMessageAsync("Data backed up successfully.");
var displayName = await GraphServiceHelper.GetMyDisplayNameAsync();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
txtResults.Text = "Welcome " + displayName;
btnSignOutTip.IsEnabled = true;
});
}
catch (ServiceException ex)
{
if (ex.StatusCode == System.Net.HttpStatusCode.Unauthorized)
{
// MS Graph Known Error
// Users need to sign into OneDrive at least once
// https://docs.microsoft.com/en-us/graph/known-issues#files-onedrive
// Empty all cached accounts / data to allow user to rety
await authProvider.SignOut();
await DisplayMessageAsync("Error 401. Access Denied. Please make sure you've logged\ninto OneDrive and your email at least once then try again.");
}
else if (ex.StatusCode == HttpStatusCode.NotFound)
{
await DisplayMessageAsync("Error 404. Resource requested is not available.");
}
else if (ex.StatusCode == HttpStatusCode.Conflict)
{
await DisplayMessageAsync("Error 409. Error backing up, issue retrieving backup folder. Please try again.");
}
else if (ex.StatusCode == HttpStatusCode.BadGateway)
{
await DisplayMessageAsync("Error 502. Bad Gateway.\nPlease check your internet connection and try again in a few.");
}
else if (ex.StatusCode == HttpStatusCode.ServiceUnavailable)
{
await DisplayMessageAsync("Error 503. Service unavailable due to high load or maintenance.\nPlease try again in a few.");
}
else if (ex.IsMatch(GraphErrorCode.GeneralException.ToString()))
{
await DisplayMessageAsync("General Exception. Please check your internet connection and try again in a few.");
}
}
catch (MsalException msalex)
{
if (msalex.ErrorCode == MsalError.AuthenticationCanceledError)
{
await DisplayMessageAsync(msalex.Message);
}
else if (msalex.ErrorCode == MsalError.InvalidGrantError)
{
// invalid_grant ErrorCode comes from no consent
// for the correct scopes (todo: add interactive retry)
await DisplayMessageAsync("Invalid access scopes, please contact the developer.");
}
}
catch (Exception ex)
{
await DisplayMessageAsync(ex.Message);
}
finally
{
progressRing.IsActive = false;
}
}
