Initial commit

lib/pages/new_private_chat/qr_scanner_modal.dart

@@ -0,0 +1,80 @@
+// SPDX-FileCopyrightText: 2019-Present Christian Kußowski
+// SPDX-FileCopyrightText: 2019-Present Contributors to FluffyChat
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import 'dart:async';
+import 'dart:io';
+
+import 'package:tatchat/l10n/l10n.dart';
+import 'package:material_ui/material_ui.dart';
+import 'package:qr_code_scanner_plus/qr_code_scanner_plus.dart';
+
+class QrScannerModal extends StatefulWidget {
+  final void Function(String) onScan;
+  const QrScannerModal({required this.onScan, super.key});
+
+  @override
+  QrScannerModalState createState() => QrScannerModalState();
+}
+
+class QrScannerModalState extends State<QrScannerModal> {
+  final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
+  QRViewController? controller;
+
+  @override
+  void reassemble() {
+    super.reassemble();
+    if (Platform.isAndroid) {
+      controller!.pauseCamera();
+    } else if (Platform.isIOS) {
+      controller!.resumeCamera();
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        leading: IconButton(
+          icon: const Icon(Icons.close_outlined),
+          onPressed: Navigator.of(context).pop,
+          tooltip: L10n.of(context).close,
+        ),
+        title: Text(L10n.of(context).scanQrCode),
+      ),
+      body: Stack(
+        children: [
+          QRView(
+            key: qrKey,
+            onQRViewCreated: _onQRViewCreated,
+            overlay: QrScannerOverlayShape(
+              borderColor: Theme.of(context).colorScheme.primary,
+              borderRadius: 10,
+              borderLength: 30,
+              borderWidth: 8,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  void _onQRViewCreated(QRViewController controller) {
+    this.controller = controller;
+    // Workaround for QR Scanner is started in Pause mode
+    // https://github.com/juliuscanute/qr_code_scanner/issues/538#issuecomment-1133883828
+    if (Platform.isAndroid) {
+      controller.pauseCamera();
+    }
+    controller.resumeCamera();
+    late StreamSubscription sub;
+    sub = controller.scannedDataStream.listen((scanData) {
+      sub.cancel();
+      if (!mounted) return;
+      Navigator.of(context).pop();
+      final data = scanData.code;
+      if (data != null) widget.onScan(data);
+    });
+  }
+}