internal static async Task PerformCodeExchangeAsync(string code, string codeVerifier)
{
var accessToken = await GetAccessToken(code, codeVerifier);
using (var httpClient = new HttpClient(new HttpClientHandler {
AllowAutoRedirect = true
}))
{
httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);
var userInfoResponse = await httpClient.GetAsync(USER_INFO_END_POINT);
var userInfoResponseContent = await userInfoResponse.Content.ReadAsStringAsync();
var account = JsonConvert.DeserializeObject <JObject>(userInfoResponseContent);
var user = new User {
Token = accessToken
};
if (!userInfoResponseContent.Contains("error"))
{
user.FamilyName = account["family_name"].Value <string>();
user.GivenName = account["given_name"].Value <string>();
user.Email = account["email"].Value <string>();
user.Name = account["name"].Value <string>();
user.Id = account["sub"].Value <string>();
user.Picture = account["picture"].Value <string>();
}
await UserSignedIn.Raise(user);
}
}
public static void Initilize(string clientId)
{
if (clientId.IsEmpty())
{
Log.For(typeof(Google)).Error("Please set the ClientId by calling Initilize method first!");
return;
}
Auth = new Xamarin.Auth.OAuth2Authenticator(
clientId, "", "openid profile email", new Uri(AUTH_END_POINT),
new Uri($"com.googleusercontent.apps.{clientId.Remove(".apps.googleusercontent.com")}:/oauth2redirect"),
new Uri(TOKEN_END_POINT), null, true)
{
AllowCancel = true
};
Auth.Completed += async(s, args) =>
{
if (args.IsAuthenticated)
{
var request = new Xamarin.Auth.OAuth2Request("GET", new Uri(USER_INFO_END_POINT), null, args.Account);
var response = await request.GetResponseAsync();
var accountStr = await response.GetResponseTextAsync();
var account = JsonConvert.DeserializeObject <JObject>(accountStr);
await UserSignedIn.Raise(new Google.User
{
FamilyName = account["family_name"].Value <string>(),
GivenName = account["given_name"].Value <string>(),
Email = account["email"].Value <string>(),
Name = account["name"].Value <string>(),
Id = account["sub"].Value <string>(),
Picture = account["picture"].Value <string>(),
Token = args.Account.Properties["id_token"] ?? ""
});
}
};
}
public static void Initialize()
{
UIRuntime.OnActivityResult.Handle(args =>
{
if (args.Item1 == SIGNIN_REQUEST_CODE && args.Item2 == Android.App.Result.Ok)
{
if (args.Item3 == null)
{
Log.For(typeof(Google)).Error("[Zebble.Google] => The Google Play Services are not installed on your device, please make sure to installed them");
return;
}
var result = Auth.GoogleSignInApi.GetSignInResultFromIntent(args.Item3);
if (result.IsSuccess)
{
var account = result.SignInAccount;
UserSignedIn.Raise(new User
{
FamilyName = account.FamilyName,
GivenName = account.GivenName,
Id = account.Id,
Name = account.DisplayName,
Picture = account.PhotoUrl?.ToString(),
Email = account.Email,
Token = account.IdToken
});
}
}
});
var context = UIRuntime.CurrentActivity;
var serverClientIdStr = context.Resources.GetIdentifier("server_client_id", "string", context.PackageName);
if (serverClientIdStr == 0)
{
Log.For(typeof(Google)).Error("Google Client ID is not set on Android application. Please add server_client_id to the resource string file.");
return;
}
var clientId = context.GetString(serverClientIdStr);
var gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DefaultSignIn)
.RequestEmail()
.RequestProfile()
.RequestIdToken(clientId)
.Build();
ApiClient = new GoogleApiClient.Builder(UIRuntime.CurrentActivity)
.AddApi(Auth.GOOGLE_SIGN_IN_API, gso)
.AddConnectionCallbacks(connectedCallback: bundle =>
{
if (bundle != null)
{
Log.For(typeof(Google)).Debug("Google connected");
}
else
{
Log.For(typeof(Google)).Error("Google connection filed");
}
}).Build();
ApiClient.Connect();
}