void RefreshFeed(bool force = false)
{
HandleError(() =>
{
// Try to get the access token from out isolated storage
accessToken = Storage.AccessTokenStorage.RetrieveAccessToken();
if (accessToken != null)
{
// If we already have the access token in the storage, just load the current feed.
ToogleSignInState(true);
Dispatcher.BeginInvoke(() =>
{
(this.ApplicationBar.Buttons[1] as ApplicationBarIconButton).IsEnabled = true;
(this.ApplicationBar.MenuItems[0] as ApplicationBarMenuItem).IsEnabled = true;
});
LoadStream(force);
}
else
{
Authorize(() =>
{
Dispatcher.BeginInvoke(() =>
{
ToogleSignInState(true);
(this.ApplicationBar.Buttons[1] as ApplicationBarIconButton).IsEnabled = true;
(this.ApplicationBar.MenuItems[0] as ApplicationBarMenuItem).IsEnabled = true;
LoadStream(force);
});
});
}
});
}
private void SignOutButton_Click(object sender, EventArgs e)
{
HandleError(() =>
{
if (this.data.IsSignedIn)
{
(this.ApplicationBar.MenuItems[0] as ApplicationBarMenuItem).IsEnabled = false;
(this.ApplicationBar.Buttons[1] as ApplicationBarIconButton).IsEnabled = false;
Storage.AccessTokenStorage.ClearAccessToken();
accessToken = null;
data.Reset();
ToogleSignInState(false);
}
});
}
private void Authorize(Action afterAuthorize)
{
HandleError(() =>
{
// We don't have the access token in the storage, start the OAuth autorization process.
var auth = new Yammer.ApiAuthorization(AuthBrowser);
auth.AfterBrowsingComplete += new Yammer.ApiAuthorization.AfterBrowsingCompleteHandler(auth_AfterBrowsingComplete);
auth.BeforeBrowsingBegin += new Yammer.ApiAuthorization.BeforeBrowsingBeginHandler(auth_BeforeBrowsingBegin);
auth.BeginAuthorization(at =>
{
// Now that the authorization process is completed, save the access token for future uses and load the current feed.
accessToken = at;
Storage.AccessTokenStorage.SaveAccessToken(at);
afterAuthorize();
});
});
}