Make the Controller a singleton

qml/LoginPage.qml

@@ -8,6 +8,8 @@ import QtQuick 2.12
 import QtQuick.Controls 2.12 as QQC2
 import QtQuick.Layouts 1.12
 
+import Spectral 0.1
+
 import Spectral.Component 2.0
 
 import org.kde.kirigami 2.12 as Kirigami
@@ -17,8 +19,6 @@ Kirigami.ScrollablePage {
 
     title: i18n("Login")
 
-    required property var spectralController
-
     Kirigami.FormLayout {
         id: formLayout
         QQC2.TextField {
@@ -55,9 +55,9 @@ Kirigami.ScrollablePage {
 
     function doLogin() {
         if (accessTokenField.text.length > 0) {
-            spectralController.loginWithAccessToken(serverField.text, usernameField.text, accessTokenField.text, deviceNameField.text)
+            Controller.loginWithAccessToken(serverField.text, usernameField.text, accessTokenField.text, deviceNameField.text)
         } else {
-            spectralController.loginWithCredentials(serverField.text, usernameField.text, passwordField.text, deviceNameField.text)
+            Controller.loginWithCredentials(serverField.text, usernameField.text, passwordField.text, deviceNameField.text)
         }
     }
 }

qml/main.qml

@@ -46,42 +46,36 @@ Kirigami.ApplicationWindow {
         }
     }
 
-    Controller {
-        id: spectralController
-
-        quitOnLastWindowClosed: true
-
-        onErrorOccured: showPassiveNotification(error + ": " + detail)
+    Connections {
+        target: Controller
 
         onInitiated: {
-
-            if (spectralController.accountCount === 0) {
-                pageStack.replace("qrc:/qml/LoginPage.qml", {
-                    'spectralController': spectralController
-                });
+            if (Controller.accountCount === 0) {
+                pageStack.replace("qrc:/qml/LoginPage.qml", {});
             } else {
                 pageStack.replace(roomListComponent);
             }
         }
 
         onConnectionAdded: {
-            if (spectralController.accountCount === 1) {
+            if (Controller.accountCount === 1) {
                 console.log("roomListComponent")
                 pageStack.replace(roomListComponent);
             }
         }
+        onErrorOccured: showPassiveNotification(error + ": " + detail)
     }
 
     Binding {
         target: imageProvider
         property: "connection"
-        value: spectralController.connection
+        value: Controller.connection
     }
 
     RoomListModel {
         id: spectralRoomListModel
 
-        connection: spectralController.connection
+        connection: Controller.connection
     }
 
     Component {