async void Browser_Navigated(object sender, WebNavigatedEventArgs e)
{
//verify callback URL
Debug.WriteLine(e.Url);
Uri url = new Uri(e.Url);
if (url.Host.Contains("example.com"))
{
//parse the response
var code = HttpUtility.ParseQueryString(url.Query).Get("code");
var error = HttpUtility.ParseQueryString(url.Query).Get("error");
//exchange this for a token
Debug.WriteLine("Got Code: " + code);
if (error != null)
{
Debug.WriteLine("Error with logging user in");
await DisplayAlert("Uh-oh", "There was trouble logging you in", "Try Again");
Browser.Source = URL;
await Navigation.PopAsync();
}
//To-do: Exchange the code for an access token
Device.BeginInvokeOnMainThread(async() =>
{
//Save the RefreshToken and set App AccessToken and LastRefreshedTime
var postbackURL = "https://accounts.spotify.com/api/token";
var tokens = await OAuth2Helper.GetAccessTokenFromCode(postbackURL,
Credentials.RedirectURI,
Credentials.ClientID,
Credentials.ClientSecret,
Credentials.Scopes,
code);
//In App.cs, add these variables to maintain context
App.HasLoggedIn = true;
App.AuthModel = tokens;
await Navigation.PushModalAsync(new ProfilePage());
});
}
}
