Port to declarative type registration

src/qml/LoginStep.qml

@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: 2020 Carl Schwan <carl@carlschwan.de>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+import QtQuick
+import QtQuick.Controls as QQC2
+import QtQuick.Layouts
+
+/// Step for the login/registration flow
+ColumnLayout {
+    id: root
+
+    /// Set to true if the login step does not have any controls. This will ensure that the focus remains on the "continue" button
+    property bool noControls: false
+
+    /// Process this module, this is called by the continue button.
+    /// Should call \sa processed when it finish successfully.
+    property QQC2.Action nextAction: null
+
+    /// Go to the previous module. This is called by the "go back" button.
+    /// If no "go back" button should be shown, this should be null.
+    property QQC2.Action previousAction: null
+
+    /// Called when switching to the next step.
+    signal processed(url nextUrl)
+
+    /// Show a message in a banner at the top of the page.
+    signal showMessage(string message)
+
+    /// Clears any error messages currently being shown
+    signal clearError()
+}