Add QR code scanner

src/qml/QrScannerPage.qml

@@ -0,0 +1,58 @@
+// SPDX-FileCopyrightText: 2024 Tobias Fella <tobias.fella@kde.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+import QtQuick
+import QtQuick.Controls as QQC2
+import QtMultimedia
+
+import org.kde.kirigami as Kirigami
+import org.kde.prison.scanner as Prison
+
+import org.kde.neochat
+
+Kirigami.Page {
+    id: root
+
+    title: i18nc("@title", "Scan a QR Code")
+
+    required property NeoChatConnection connection
+    padding: 0
+
+    Component.onCompleted: camera.start()
+
+    Connections {
+        target: root.QQC2.ApplicationWindow.window
+        function onClosing() {
+            root.destroy();
+        }
+    }
+
+    VideoOutput {
+        id: viewFinder
+        anchors.centerIn: parent
+    }
+
+    Prison.VideoScanner {
+        id: scanner
+        property string previousText: ""
+        formats: Prison.Format.QRCode | Prison.Format.Aztec
+        onResultChanged: {
+            if (result.text.length > 0 && result.text != scanner.previousText) {
+                RoomManager.resolveResource(result.text, "");
+                scanner.previousText = result.text;
+            }
+            root.closeDialog();
+        }
+        videoSink: viewFinder.videoSink
+    }
+
+    CaptureSession {
+        camera: Camera {
+            id: camera
+        }
+        imageCapture: ImageCapture {
+            id: imageCapture
+        }
+        videoOutput: viewFinder
+    }
+}