Add QrCode authentication

moneymgr_mobile/lib/routes/login/base_auth_page.dart

@@ -35,12 +35,14 @@ class BaseAuthPage extends StatelessWidget {
         ],
       ),
       body: SingleChildScrollView(
-        child: SeparatedColumn(
-          padding: EdgeInsets.all(context.gutter),
-          separatorBuilder: () => const Gutter(),
-          mainAxisAlignment: MainAxisAlignment.center,
-          crossAxisAlignment: CrossAxisAlignment.stretch,
-          children: children,
+        child: IntrinsicHeight(
+          child: SeparatedColumn(
+            padding: EdgeInsets.all(context.gutter),
+            separatorBuilder: () => const Gutter(),
+            mainAxisAlignment: MainAxisAlignment.center,
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: children,
+          ),
         ),
       ),
     );

moneymgr_mobile/lib/routes/login/login_screen.dart

@@ -24,7 +24,7 @@ class LoginScreen extends HookConsumerWidget {
           label: "Enter manually authentication information",
         ),
         _LoginChoice(
-          route: manualAuthPage,
+          route: qrAuthPath,
           icon: Icons.qr_code_2,
           label: "Scan authentication Qr Code",
         ),

moneymgr_mobile/lib/routes/login/qr_auth_screen.dart

@@ -0,0 +1,80 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:go_router/go_router.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:logging/logging.dart';
+import 'package:mobile_scanner/mobile_scanner.dart';
+import 'package:moneymgr_mobile/providers/auth_state.dart';
+import 'package:moneymgr_mobile/services/api/api_token.dart';
+import 'package:moneymgr_mobile/services/router/routes_list.dart';
+import 'package:moneymgr_mobile/utils/extensions.dart';
+
+class QrAuthScreen extends HookConsumerWidget {
+  const QrAuthScreen({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final loading = useState(false);
+
+    handleCapture(BarcodeCapture barcodes) async {
+      if (loading.value) return;
+
+      if (barcodes.barcodes.length != 1) return;
+      final b = barcodes.barcodes[0];
+
+      if (b.format != BarcodeFormat.qrCode) {
+        context.showTextSnackBar(
+          "Only QrCode are supported!",
+          duration: Duration(seconds: 1),
+        );
+        return;
+      }
+
+      final value = b.rawValue ?? "";
+
+      Logger.root.finest("Decoded QrCode: $value");
+
+      if (!value.startsWith("moneymgr://")) {
+        context.showTextSnackBar(
+          "Not a MoneyMgr Qr Code!",
+          duration: Duration(seconds: 1),
+        );
+        return;
+      }
+
+      // Decode token
+      final uri = Uri.parse(
+        value.replaceFirst("moneymgr://", "http://test.com/?"),
+      );
+      final token = ApiToken(
+        apiUrl: uri.queryParameters["api"] ?? "",
+        tokenId: int.tryParse(uri.queryParameters["id"] ?? "") ?? 0,
+        tokenValue: uri.queryParameters["secret"] ?? "",
+      );
+
+      // Attempt to authenticate using token
+      try {
+        loading.value = true;
+
+        await ref.read(currentAuthStateProvider.notifier).setAuthToken(token);
+
+        if (context.mounted) {
+          if (context.canPop()) context.pop();
+          context.replace(profilePage);
+        }
+      } catch (e, s) {
+        Logger.root.severe("Failed to authenticate user! $e $s");
+        if (context.mounted) {
+          context.showTextSnackBar("Failed to authenticate user! $e");
+        }
+      } finally {
+        loading.value = false;
+      }
+    }
+
+    return Scaffold(
+      appBar: AppBar(title: Text('QR Authentication')),
+      body: MobileScanner(onDetect: handleCapture),
+    );
+  }
+}