public GoogleAPIAuthorizationWindow(ViewModel viewModel)
{
InitializeComponent();
_viewModel = viewModel;
this.DataContext = _viewModel;
SourceInitialized += GoogleAPIAuthorizationWindow_SourceInitialized;
}
public async Task<DriveService> GetDriveServiceAsync()
{
DriveService driveService = default(DriveService);
//Instantiation of fully linked window and ViewModel (non-MVVM way somehow)
ViewModel authorizationWindowViewModel = new ViewModel(this._AuthorizeDriveService);
GoogleAPIAuthorizationWindow authorizationWindow =
new GoogleAPIAuthorizationWindow(authorizationWindowViewModel);
authorizationWindowViewModel.ParentWindow = authorizationWindow;
if (System.IO.File.Exists(_tokenFilePath))
{
while (driveService == default(DriveService))
{
try
{
driveService = await _AuthorizeDriveService();
}
catch (Exception) //If token has expired or there is no internet connection
{
//Must be reviewed, as the file may be removed in try block automatically
System.IO.File.Delete(_tokenFilePath);
driveService = default(DriveService);
}
//There isn't token file, so call the dialog
if (driveService == default(DriveService))
{
driveService = authorizationWindow.ShowDialog();
}
}
}
else //If authorizing through a browser initially
{
while (driveService == default(DriveService))
{
try
{
driveService = authorizationWindow.ShowDialog();
}
catch (Exception)
{
//If there is no connection or user cancelled - swallow
driveService = default(DriveService);
}
}
}
return driveService;
}
public SignInCommandImplementation(ViewModel viewModel)
{
_viewModel = viewModel;
}
public ExitCommandImplementation(ViewModel viewModel)
{
_viewModel = viewModel;
}