Implement OIDC registration/login compat

src/login/Homeserver.qml

@@ -37,10 +37,23 @@ LoginStep {
         onTriggered: Registration.homeserver = urlField.text
     }
 
+    Connections {
+        target: Registration
+        function onConnected(connection): void {
+            root.processed("Loading");
+        }
+    }
+
     nextAction: Kirigami.Action {
-        text: Registration.testing ? i18n("Loading") : null
+        text: Registration.testing ? i18n("Loading") : Registration.status === Registration.Oidc ? i18nc("@action:button", "Continue in Browser") : null
         enabled: Registration.status > Registration.ServerNoRegistration
-        onTriggered: root.processed("Username")
+        onTriggered: {
+            if (Registration.status === Registration.Oidc) {
+                Qt.openUrlExternally(Registration.oidcUrl)
+            } else {
+                root.processed("Username")
+            }
+        }
     }
     previousAction: Kirigami.Action {
         onTriggered: root.processed("LoginRegister")

src/login/registration.cpp

@@ -180,6 +180,41 @@ void Registration::testHomeserver()
             if (m_testServerJob) {
                 delete m_testServerJob;
             }
+#if Quotient_VERSION_MINOR > 9 || Quotient_VERSION_PATCH > 2
+            auto ssoFlow = m_connection->getLoginFlow(LoginFlowTypes::SSO);
+            if (ssoFlow && ssoFlow->delegatedOidcCompatibility) {
+                auto session = m_connection->prepareForSso(u"NeoChat"_s);
+                m_oidcUrl = session->ssoUrlForRegistration();
+                Q_EMIT oidcUrlChanged();
+                setStatus(Oidc);
+                connect(m_connection, &Connection::connected, this, [this] {
+                    Q_EMIT connected(m_connection.get());
+                    Q_ASSERT(m_connection);
+                    AccountSettings account(m_connection->userId());
+                    account.setKeepLoggedIn(true);
+                    account.setHomeserver(m_connection->homeserver());
+                    account.setDeviceId(m_connection->deviceId());
+                    account.sync();
+                    QMetaObject::invokeMethod(
+                        this,
+                        [this]() {
+                            m_accountManager->addConnection(m_connection);
+                            m_accountManager->setActiveConnection(m_connection);
+                            m_connection = nullptr;
+                        },
+                        Qt::QueuedConnection);
+                    connect(
+                        m_connection.get(),
+                        &Connection::syncDone,
+                        this,
+                        [this]() {
+                            Q_EMIT loaded();
+                        },
+                        Qt::SingleShotConnection);
+                });
+                return;
+            }
+#endif
             m_testServerJob = m_connection->callApi<NeoChatRegisterJob>("user"_L1, std::nullopt, "user"_L1, QString(), QString(), QString(), false);
 
             connect(m_testServerJob.data(), &BaseJob::finished, this, [this]() {

src/login/registration.h

@@ -75,6 +75,7 @@ class Registration : public QObject
     Q_PROPERTY(QList<QVariantMap> terms READ terms NOTIFY termsChanged)
     Q_PROPERTY(Status status READ status NOTIFY statusChanged)
     Q_PROPERTY(QString statusString READ statusString NOTIFY statusChanged)
+    Q_PROPERTY(QUrl oidcUrl MEMBER m_oidcUrl NOTIFY oidcUrlChanged)
 
 public:
     enum Status {
@@ -87,6 +88,7 @@ public:
         UsernameTaken,
         Ready,
         Working,
+        Oidc,
     };
     Q_ENUM(Status);
     static Registration &instance()
@@ -147,6 +149,8 @@ Q_SIGNALS:
     void nextStepChanged();
     void statusChanged();
     void loaded();
+    void oidcUrlChanged();
+    void connected(NeoChatConnection *connection);
 
 private:
     QPointer<AccountManager> m_accountManager;
@@ -163,6 +167,7 @@ private:
     QString m_session;
     QString m_sid;
     QString m_emailSecret;
+    QUrl m_oidcUrl;
 
     QPointer<Quotient::CheckUsernameAvailabilityJob> m_usernameJob;
     QPointer<NeoChatRegisterJob> m_testServerJob;