feat: Implement qr code scanner

lib/pages/new_private_chat.dart

@@ -1,3 +1,4 @@
+import 'package:fluffychat/pages/qr_scanner_modal.dart';
 import 'package:matrix/matrix.dart';
 import 'package:fluffychat/utils/fluffy_share.dart';
 import 'package:fluffychat/pages/views/new_private_chat_view.dart';
@@ -75,6 +76,11 @@ class NewPrivateChatController extends State<NewPrivateChat> {
         context,
       );
 
+  void openScannerAction() => showDialog(
+        context: context,
+        builder: (_) => QrScannerModal(),
+      );
+
   @override
   Widget build(BuildContext context) => NewPrivateChatView(this);
 }

lib/pages/qr_scanner_modal.dart

@@ -0,0 +1,59 @@
+import 'dart:io';
+
+import 'package:fluffychat/utils/url_launcher.dart';
+import 'package:flutter/material.dart';
+import 'package:qr_code_scanner/qr_code_scanner.dart';
+import 'package:flutter_gen/gen_l10n/l10n.dart';
+
+class QrScannerModal extends StatefulWidget {
+  const QrScannerModal({Key key}) : super(key: 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: Icon(Icons.close_outlined),
+          onPressed: Navigator.of(context).pop,
+        ),
+        title: Text(L10n.of(context).scanQrCode),
+      ),
+      body: QRView(
+        key: qrKey,
+        onQRViewCreated: _onQRViewCreated,
+      ),
+    );
+  }
+
+  void _onQRViewCreated(QRViewController controller) {
+    this.controller = controller;
+    controller.scannedDataStream.listen((scanData) {
+      Navigator.of(context).pop();
+      UrlLauncher(context, scanData.code).openMatrixToUrl();
+    });
+  }
+
+  @override
+  void dispose() {
+    controller?.dispose();
+    super.dispose();
+  }
+}

lib/pages/views/new_private_chat_view.dart

@@ -2,6 +2,7 @@ import 'dart:math';
 
 import 'package:fluffychat/config/app_config.dart';
 import 'package:fluffychat/pages/new_private_chat.dart';
+import 'package:fluffychat/utils/platform_infos.dart';
 import 'package:fluffychat/widgets/layouts/max_width_body.dart';
 import 'package:fluffychat/widgets/matrix.dart';
 import 'package:flutter/material.dart';
@@ -105,11 +106,13 @@ class NewPrivateChatView extends StatelessWidget {
           ],
         ),
       ),
-      floatingActionButton: FloatingActionButton.extended(
+      floatingActionButton: PlatformInfos.isMobile
-        onPressed: () {},
+          ? FloatingActionButton.extended(
+              onPressed: controller.openScannerAction,
               label: Text(L10n.of(context).scanQrCode),
               icon: Icon(Icons.camera_alt_outlined),
-      ),
+            )
+          : null,
     );
   }
 }

pubspec.lock

@@ -1019,6 +1019,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  qr_code_scanner:
+    dependency: "direct main"
+    description:
+      name: qr_code_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.5.2"
   qr_flutter:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -56,6 +56,7 @@ dependencies:
   pin_code_text_field: ^1.8.0
   provider: ^5.0.0
   punycode: ^1.0.0
+  qr_code_scanner: ^0.5.2
   qr_flutter: ^4.0.0
   receive_sharing_intent: ^1.4.5
   record: ^3.0.0