Use ASWebAuthenticationSession to display OIDC account management URL (#7671)

Co-authored-by: Doug <douglase@element.io>

Riot/Modules/Settings/SettingsViewController.m

@@ -204,7 +204,8 @@ SettingsIdentityServerCoordinatorBridgePresenterDelegate,
 ServiceTermsModalCoordinatorBridgePresenterDelegate,
 TableViewSectionsDelegate,
 ThreadsBetaCoordinatorBridgePresenterDelegate,
-ChangePasswordCoordinatorBridgePresenterDelegate>
+ChangePasswordCoordinatorBridgePresenterDelegate,
+SSOAuthenticationPresenterDelegate>
 {
     // Current alert (if any).
     __weak UIAlertController *currentAlert;
@@ -300,6 +301,8 @@ ChangePasswordCoordinatorBridgePresenterDelegate>
 @property (nonatomic) BOOL isPreparingIdentityService;
 @property (nonatomic, strong) ServiceTermsModalCoordinatorBridgePresenter *serviceTermsModalCoordinatorBridgePresenter;
 
+@property (nonatomic, strong) SSOAuthenticationPresenter *ssoAuthenticationPresenter;
+
 @property (nonatomic) AnalyticsScreenTracker *screenTracker;
 
 @end
@@ -3926,7 +3929,12 @@ ChangePasswordCoordinatorBridgePresenterDelegate>
 {
     NSURL *url = [NSURL URLWithString: self.mainSession.homeserverWellknown.authentication.account];
     if (url) {
-        [UIApplication.sharedApplication openURL:url options:@{} completionHandler:nil];
+        SSOAccountService *service = [[SSOAccountService alloc] initWithAccountURL:url];
+        SSOAuthenticationPresenter *presenter = [[SSOAuthenticationPresenter alloc] initWithSsoAuthenticationService:service];
+        presenter.delegate = self;
+        self.ssoAuthenticationPresenter = presenter;
+        
+        [presenter presentForIdentityProvider:nil with:@"" from:self animated:YES];
     }
 }
 
@@ -4602,4 +4610,26 @@ ChangePasswordCoordinatorBridgePresenterDelegate>
     [self.userSessionsFlowCoordinatorBridgePresenter pushFrom:self.navigationController animated:YES];
 }
 
+#pragma mark - SSOAuthenticationPresenterDelegate
+
+- (void)ssoAuthenticationPresenterDidCancel:(SSOAuthenticationPresenter *)presenter
+{
+    self.ssoAuthenticationPresenter = nil;
+    MXLogDebug(@"OIDC account management complete.")
+}
+
+- (void)ssoAuthenticationPresenter:(SSOAuthenticationPresenter *)presenter authenticationDidFailWithError:(NSError *)error
+{
+    self.ssoAuthenticationPresenter = nil;
+    MXLogError(@"OIDC account management failed.")
+}
+
+- (void)ssoAuthenticationPresenter:(SSOAuthenticationPresenter *)presenter
+  authenticationSucceededWithToken:(NSString *)token
+             usingIdentityProvider:(SSOIdentityProvider *)identityProvider
+{
+    self.ssoAuthenticationPresenter = nil;
+    MXLogWarning(@"Unexpected callback after OIDC account management.")
+}
+
 @end