Support token authenticated registration

Using a dialog after username and password have been provided.

CMakeLists.txt

@@ -286,6 +286,7 @@ set(SRC_FILES
 	src/dialogs/Logout.cpp
 	src/dialogs/PreviewUploadOverlay.cpp
 	src/dialogs/ReCaptcha.cpp
+	src/dialogs/TokenRegistration.cpp
 
 	# Emoji
 	src/emoji/EmojiModel.cpp
@@ -497,6 +498,7 @@ qt5_wrap_cpp(MOC_HEADERS
 	src/dialogs/Logout.h
 	src/dialogs/PreviewUploadOverlay.h
 	src/dialogs/ReCaptcha.h
+	src/dialogs/TokenRegistration.h
 
 	# Emoji
 	src/emoji/EmojiModel.h

src/RegisterPage.cpp

@@ -25,6 +25,7 @@
 
 #include "dialogs/FallbackAuth.h"
 #include "dialogs/ReCaptcha.h"
+#include "dialogs/TokenRegistration.h"
 
 Q_DECLARE_METATYPE(mtx::user_interactive::Unauthorized)
 Q_DECLARE_METATYPE(mtx::user_interactive::Auth)
@@ -481,6 +482,23 @@ RegisterPage::doUIA(const mtx::user_interactive::Unauthorized &unauthorized)
                 doRegistrationWithAuth(
                   mtx::user_interactive::Auth{session, mtx::user_interactive::auth::Dummy{}});
 
+        } else if (current_stage == mtx::user_interactive::auth_types::registration_token) {
+                auto dialog = new dialogs::TokenRegistration(this);
+
+                connect(dialog,
+                        &dialogs::TokenRegistration::confirmation,
+                        this,
+                        [this, session, dialog](std::string token) {
+                                dialog->close();
+                                dialog->deleteLater();
+                                emit registrationWithAuth(mtx::user_interactive::Auth{
+                                  session, mtx::user_interactive::auth::RegistrationToken{token}});
+                        });
+
+                connect(
+                  dialog, &dialogs::TokenRegistration::cancel, this, &RegisterPage::errorOccurred);
+
+                dialog->show();
         } else {
                 // use fallback
                 auto dialog = new dialogs::FallbackAuth(

src/dialogs/TokenRegistration.cpp

@@ -0,0 +1,62 @@
+// SPDX-FileCopyrightText: 2021 Nheko Contributors
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include <QLabel>
+#include <QPushButton>
+#include <QVBoxLayout>
+
+#include "dialogs/TokenRegistration.h"
+
+#include "Config.h"
+#include "MatrixClient.h"
+#include "ui/TextField.h"
+
+using namespace dialogs;
+
+TokenRegistration::TokenRegistration(QWidget *parent)
+  : QWidget(parent)
+{
+        setAutoFillBackground(true);
+        setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
+        setWindowModality(Qt::WindowModal);
+        setAttribute(Qt::WA_DeleteOnClose, true);
+
+        auto layout = new QVBoxLayout(this);
+        layout->setSpacing(conf::modals::WIDGET_SPACING);
+        layout->setMargin(conf::modals::WIDGET_MARGIN);
+
+        auto buttonLayout = new QHBoxLayout();
+        buttonLayout->setSpacing(8);
+        buttonLayout->setMargin(0);
+
+        cancelBtn_  = new QPushButton(tr("Cancel"), this);
+        confirmBtn_ = new QPushButton(tr("Confirm"), this);
+        confirmBtn_->setDefault(true);
+
+        buttonLayout->addStretch(1);
+        buttonLayout->addWidget(cancelBtn_);
+        buttonLayout->addWidget(confirmBtn_);
+
+        tokenInput_ = new TextField(this);
+        tokenInput_->setLabel(tr("Registration token"));
+
+        QFont font;
+        font.setPointSizeF(font.pointSizeF() * conf::modals::LABEL_MEDIUM_SIZE_RATIO);
+
+        auto label = new QLabel(tr("Please enter a valid registration token."), this);
+        label->setFont(font);
+
+        layout->addWidget(label);
+        layout->addWidget(tokenInput_);
+        layout->addLayout(buttonLayout);
+
+        connect(confirmBtn_, &QPushButton::clicked, this, [this]() {
+                emit confirmation(tokenInput_->text().toStdString());
+                emit close();
+        });
+        connect(cancelBtn_, &QPushButton::clicked, this, [this]() {
+                emit cancel();
+                emit close();
+        });
+}

src/dialogs/TokenRegistration.h

@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: 2021 Nheko Contributors
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <QWidget>
+
+class QPushButton;
+class QLabel;
+class TextField;
+
+namespace dialogs {
+
+class TokenRegistration : public QWidget
+{
+        Q_OBJECT
+
+public:
+        TokenRegistration(QWidget *parent = nullptr);
+
+signals:
+        void confirmation(std::string token);
+        void cancel();
+
+private:
+        QPushButton *confirmBtn_;
+        QPushButton *cancelBtn_;
+        TextField *tokenInput_;
+};
+} // dialogs