private void StartGoogleAuth(object sender, EventArgs e)
{
Xamarin.Auth.OAuth2Authenticator authentificator = GoogleAuthenticator.GetAuthenticator();
UIViewController viewController = authentificator.GetUI();
PresentViewController(viewController, true, null);
}
private void StartFacebookAuth(object sender, EventArgs e)
{
_facebookAuthenticator = new FacebookAuthenticator(Configuration.ClientId, Configuration.Scope, ViewModel);
Xamarin.Auth.OAuth2Authenticator authenticator = _facebookAuthenticator.GetAuthenticator();
UIViewController view = authenticator.GetUI();
PresentViewController(view, true, null);
}
private void OnFacebookLoginButtonClicked(object sender, EventArgs e)
{
_authFacebook = new FacebookAuthenticator(Configuration.ClientId, Configuration.Scope, ViewModel);
Xamarin.Auth.OAuth2Authenticator authenticator = _authFacebook.GetAuthenticator();
Intent intent = authenticator.GetUI(Activity);
StartActivity(intent);
}
public static Task SignIn()
{
return(Thread.UI.Run(() =>
{
if (UIRuntime.NativeRootScreen is UIViewController controller)
{
UI = Auth.GetUI();
controller.PresentViewController(UI, animated: true, null);
}
}));
}
// IOAuthAuthorizeHandler.AuthorizeAsync implementation.
public Task <IDictionary <string, string> > AuthorizeAsync(Uri serviceUri, Uri authorizeUri, Uri callbackUri)
{
// If the TaskCompletionSource is not null, authorization is in progress.
if (_taskCompletionSource != null)
{
// Allow only one authorization process at a time.
throw new Exception();
}
// Create a task completion source.
_taskCompletionSource = new TaskCompletionSource <IDictionary <string, string> >();
// Create a new Xamarin.Auth.OAuth2Authenticator using the information passed in.
Xamarin.Auth.OAuth2Authenticator authenticator = new Xamarin.Auth.OAuth2Authenticator(
clientId: AppClientId,
scope: "",
authorizeUrl: authorizeUri,
redirectUrl: callbackUri)
{
// Allow the user to cancel the OAuth attempt.
AllowCancel = true
};
// Define a handler for the OAuth2Authenticator.Completed event.
authenticator.Completed += (sender, authArgs) =>
{
try
{
// Check if the user is authenticated.
if (authArgs.IsAuthenticated)
{
// If authorization was successful, get the user's account.
Xamarin.Auth.Account authenticatedAccount = authArgs.Account;
// Set the result (Credential) for the TaskCompletionSource.
_taskCompletionSource.SetResult(authenticatedAccount.Properties);
}
}
catch (Exception ex)
{
// If authentication failed, set the exception on the TaskCompletionSource.
_taskCompletionSource.SetException(ex);
}
finally
{
// End the OAuth login activity.
this.FinishActivity(99);
}
};
// If an error was encountered when authenticating, set the exception on the TaskCompletionSource.
authenticator.Error += (sender, errArgs) =>
{
// If the user cancels, the Error event is raised but there is no exception ... best to check first.
if (errArgs.Exception != null)
{
_taskCompletionSource.SetException(errArgs.Exception);
}
else
{
// Login canceled: end the OAuth login activity.
if (_taskCompletionSource != null)
{
_taskCompletionSource.TrySetCanceled();
this.FinishActivity(99);
}
}
};
// Present the OAuth UI (Activity) so the user can enter user name and password.
Intent intent = authenticator.GetUI(this);
this.StartActivityForResult(intent, 99);
// Return completion source task so the caller can await completion.
return(_taskCompletionSource.Task);
}
// IOAuthAuthorizeHandler.AuthorizeAsync implementation
public Task <IDictionary <string, string> > AuthorizeAsync(Uri serviceUri, Uri authorizeUri, Uri callbackUri)
{
// If the TaskCompletionSource is not null, authorization may already be in progress and should be cancelled
if (_taskCompletionSource != null)
{
// Try to cancel any existing authentication task
_taskCompletionSource.TrySetCanceled();
}
// Create a task completion source
_taskCompletionSource = new TaskCompletionSource <IDictionary <string, string> >();
// Create a new Xamarin.Auth.OAuth2Authenticator using the information passed in
Xamarin.Auth.OAuth2Authenticator authenticator = new Xamarin.Auth.OAuth2Authenticator(
clientId: AppClientId,
scope: "",
authorizeUrl: authorizeUri,
redirectUrl: callbackUri)
{
ShowErrors = false
};
// Allow the user to cancel the OAuth attempt
authenticator.AllowCancel = true;
// Define a handler for the OAuth2Authenticator.Completed event
authenticator.Completed += (sender, authArgs) =>
{
try
{
// Check if the user is authenticated
if (authArgs.IsAuthenticated)
{
// If authorization was successful, get the user's account
Xamarin.Auth.Account authenticatedAccount = authArgs.Account;
// Set the result (Credential) for the TaskCompletionSource
_taskCompletionSource.SetResult(authenticatedAccount.Properties);
}
}
catch (Exception ex)
{
// If authentication failed, set the exception on the TaskCompletionSource
_taskCompletionSource.TrySetException(ex);
// Cancel authentication
authenticator.OnCancelled();
}
finally
{
// Dismiss the OAuth login
FinishActivity(99);
}
};
// If an error was encountered when authenticating, set the exception on the TaskCompletionSource
authenticator.Error += (sndr, errArgs) =>
{
// If the user cancels, the Error event is raised but there is no exception ... best to check first
if (errArgs.Exception != null)
{
_taskCompletionSource.TrySetException(errArgs.Exception);
}
else
{
// Login canceled: dismiss the OAuth login
if (_taskCompletionSource != null)
{
_taskCompletionSource.TrySetCanceled();
FinishActivity(99);
}
}
// Cancel authentication
authenticator.OnCancelled();
};
// Present the OAuth UI so the user can enter user name and password
var intent = authenticator.GetUI(this);
StartActivityForResult(intent, 99);
// Return completion source task so the caller can await completion
return(_taskCompletionSource.Task);
}
// IOAuthAuthorizeHandler.AuthorizeAsync implementation
public Task <IDictionary <string, string> > AuthorizeAsync(Uri serviceUri, Uri authorizeUri, Uri callbackUri)
{
// If the TaskCompletionSource is not null, authorization is in progress
if (_taskCompletionSource != null)
{
// Allow only one authorization process at a time
throw new Exception();
}
// Create a task completion source
_taskCompletionSource = new TaskCompletionSource <IDictionary <string, string> >();
// Create a new Xamarin.Auth.OAuth2Authenticator using the information passed in
Xamarin.Auth.OAuth2Authenticator authenticator = new Xamarin.Auth.OAuth2Authenticator(
clientId: AppClientId,
scope: "",
authorizeUrl: authorizeUri,
redirectUrl: callbackUri);
// Allow the user to cancel the OAuth attempt
authenticator.AllowCancel = true;
// Define a handler for the OAuth2Authenticator.Completed event
authenticator.Completed += (sender, authArgs) =>
{
try
{
// Check if the user is authenticated
if (authArgs.IsAuthenticated)
{
// If authorization was successful, get the user's account
Xamarin.Auth.Account authenticatedAccount = authArgs.Account;
// Set the result (Credential) for the TaskCompletionSource
_taskCompletionSource.SetResult(authenticatedAccount.Properties);
}
}
catch (Exception ex)
{
// If authentication failed, set the exception on the TaskCompletionSource
_taskCompletionSource.SetException(ex);
}
finally
{
// Dismiss the OAuth login
this.DismissViewController(true, null);
}
};
// If an error was encountered when authenticating, set the exception on the TaskCompletionSource
authenticator.Error += (sndr, errArgs) =>
{
// If the user cancels, the Error event is raised but there is no exception ... best to check first
if (errArgs.Exception != null)
{
_taskCompletionSource.SetException(errArgs.Exception);
}
else
{
// Login canceled: dismiss the OAuth login
if (_taskCompletionSource != null)
{
_taskCompletionSource.TrySetCanceled();
this.DismissViewController(true, null);
}
}
};
// Present the OAuth UI so the user can enter user name and password
InvokeOnMainThread(() =>
{
this.PresentViewController(authenticator.GetUI(), true, null);
});
// Return completion source task so the caller can await completion
return(_taskCompletionSource != null ? _taskCompletionSource.Task : null);
}
public void StartActivityInAndroid(Xamarin.Auth.OAuth2Authenticator authenticator)
{
var intent = authenticator.GetUI(MainActivity.mainactivity);
Forms.Context.StartActivity(intent);
}
// IOAuthAuthorizeHandler.AuthorizeAsync implementation
public Task<IDictionary<string, string>> AuthorizeAsync(Uri serviceUri, Uri authorizeUri, Uri callbackUri)
{
// If the TaskCompletionSource is not null, authorization is in progress
if (_taskCompletionSource != null)
{
// Allow only one authorization process at a time
throw new Exception();
}
// Create a task completion source
_taskCompletionSource = new TaskCompletionSource<IDictionary<string, string>>();
// Create a new Xamarin.Auth.OAuth2Authenticator using the information passed in
Xamarin.Auth.OAuth2Authenticator authenticator = new Xamarin.Auth.OAuth2Authenticator(
clientId: AppClientId,
scope: "",
authorizeUrl: authorizeUri,
redirectUrl: callbackUri);
// Allow the user to cancel the OAuth attempt
authenticator.AllowCancel = true;
// Define a handler for the OAuth2Authenticator.Completed event
authenticator.Completed += (sender, authArgs) =>
{
try
{
// Check if the user is authenticated
if (authArgs.IsAuthenticated)
{
// If authorization was successful, get the user's account
Xamarin.Auth.Account authenticatedAccount = authArgs.Account;
// Set the result (Credential) for the TaskCompletionSource
_taskCompletionSource.SetResult(authenticatedAccount.Properties);
}
}
catch (Exception ex)
{
// If authentication failed, set the exception on the TaskCompletionSource
_taskCompletionSource.SetException(ex);
}
finally
{
// Dismiss the OAuth login
this.FinishActivity(99);
}
};
// If an error was encountered when authenticating, set the exception on the TaskCompletionSource
authenticator.Error += (sndr, errArgs) =>
{
// If the user cancels, the Error event is raised but there is no exception ... best to check first
if (errArgs.Exception != null)
{
_taskCompletionSource.SetException(errArgs.Exception);
}
else
{
// Login canceled: dismiss the OAuth login
if (_taskCompletionSource != null)
{
_taskCompletionSource.TrySetCanceled();
this.FinishActivity(99);
}
}
};
// Present the OAuth UI so the user can enter user name and password
var intent = authenticator.GetUI(this);
this.StartActivityForResult(intent, 99);
// Return completion source task so the caller can await completion
return _taskCompletionSource.Task;
}
