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ivan2282
301
lib/screens/settings/qr_login_screen.dart
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301
lib/screens/settings/qr_login_screen.dart
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:qr_flutter/qr_flutter.dart';
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import 'package:gwid/api_service.dart';
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import 'dart:convert';
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class QrLoginScreen extends StatefulWidget {
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const QrLoginScreen({super.key});
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@override
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State<QrLoginScreen> createState() => _QrLoginScreenState();
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}
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class _QrLoginScreenState extends State<QrLoginScreen> {
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String? _token;
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String? _qrData;
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bool _isLoading = true;
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bool _isQrVisible = false;
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String? _error;
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Timer? _qrRefreshTimer; // Таймер для регенерации QR-кода (1 раз в минуту)
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Timer?
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_countdownTimer; // 👈 1. Таймер для обратного отсчета (1 раз в секунду)
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int _countdownSeconds = 60; // 👈 2. Переменная для хранения секунд
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@override
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void initState() {
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super.initState();
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_initializeAndStartTimers();
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}
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@override
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void dispose() {
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_qrRefreshTimer?.cancel();
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_countdownTimer?.cancel(); // 👈 3. Не забываем отменить второй таймер
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super.dispose();
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}
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Future<void> _initializeAndStartTimers() async {
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setState(() {
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_isLoading = true;
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_error = null;
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});
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try {
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final token = ApiService.instance.token;
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if (token == null || token.isEmpty) {
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throw Exception("Не удалось получить токен авторизации.");
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}
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if (mounted) {
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_token = token;
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_regenerateQrData(); // Первичная генерация
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_qrRefreshTimer?.cancel();
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_qrRefreshTimer = Timer.periodic(const Duration(minutes: 1), (timer) {
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_regenerateQrData();
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});
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_startCountdownTimer();
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setState(() => _isLoading = false);
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}
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} catch (e) {
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if (mounted) {
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setState(() {
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_error = e.toString();
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_isLoading = false;
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});
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}
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}
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}
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void _regenerateQrData() {
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if (_token == null) return;
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final data = {
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"type": "komet_auth_v1",
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"token": _token!,
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"timestamp": DateTime.now().millisecondsSinceEpoch,
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};
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if (mounted) {
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setState(() {
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_qrData = jsonEncode(data);
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_countdownSeconds = 60; // Сбрасываем счетчик на 60
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});
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}
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}
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void _startCountdownTimer() {
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_countdownTimer?.cancel();
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_countdownTimer = Timer.periodic(const Duration(seconds: 1), (timer) {
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if (mounted) {
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setState(() {
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if (_countdownSeconds > 0) {
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_countdownSeconds--;
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} else {
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_countdownSeconds = 60;
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}
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});
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}
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});
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}
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void _toggleQrVisibility() {
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if (_token != null) {
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setState(() {
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_isQrVisible = !_isQrVisible;
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});
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}
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}
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Widget _buildContent() {
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if (_isLoading) {
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return const Center(child: CircularProgressIndicator());
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}
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if (_error != null) {
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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const Icon(Icons.error_outline, color: Colors.red, size: 60),
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const SizedBox(height: 16),
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const Text(
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"Ошибка загрузки данных",
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style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
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),
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const SizedBox(height: 8),
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Text(_error!, textAlign: TextAlign.center),
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const SizedBox(height: 20),
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FilledButton.icon(
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onPressed: _initializeAndStartTimers,
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icon: const Icon(Icons.refresh),
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label: const Text("Повторить"),
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),
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],
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),
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);
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}
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return Column(
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mainAxisAlignment: MainAxisAlignment.center,
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: [
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_buildQrDisplay(),
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const SizedBox(height: 32),
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FilledButton.icon(
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onPressed: _toggleQrVisibility,
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icon: Icon(
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_isQrVisible
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? Icons.visibility_off_outlined
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: Icons.visibility_outlined,
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),
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label: Text(
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_isQrVisible ? "Скрыть QR-код" : "Показать QR-код для входа",
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),
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style: FilledButton.styleFrom(
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padding: const EdgeInsets.symmetric(vertical: 16),
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textStyle: const TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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),
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),
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],
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);
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}
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Widget _buildQrDisplay() {
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final colors = Theme.of(context).colorScheme;
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if (!_isQrVisible) {
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return Center(
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child: Column(
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children: [
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Icon(
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Icons.qr_code_scanner_rounded,
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size: 150,
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color: colors.onSurface.withOpacity(0.3),
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),
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const SizedBox(height: 16),
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Text(
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"QR-код скрыт",
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style: Theme.of(context).textTheme.headlineSmall,
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),
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const SizedBox(height: 8),
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Text(
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"Нажмите кнопку ниже, чтобы отобразить его.",
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style: TextStyle(color: colors.onSurfaceVariant),
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textAlign: TextAlign.center,
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),
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],
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),
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);
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}
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return Center(
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child: Column(
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children: [
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Container(
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padding: const EdgeInsets.all(12.0),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(24.0),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.1),
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spreadRadius: 2,
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blurRadius: 15,
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offset: const Offset(0, 4),
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),
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],
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),
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child: QrImageView(
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data: _qrData!,
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version: QrVersions.auto,
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size: 280.0,
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dataModuleStyle: QrDataModuleStyle(
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dataModuleShape: QrDataModuleShape.circle,
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color: colors.primary,
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),
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eyeStyle: QrEyeStyle(
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eyeShape: QrEyeShape.circle,
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color: colors.primary,
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),
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errorCorrectionLevel: QrErrorCorrectLevel.H,
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),
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),
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const SizedBox(height: 16),
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Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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Icons.timer_outlined,
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color: colors.onSurfaceVariant,
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size: 20,
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),
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const SizedBox(width: 8),
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Text(
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"Обновится через: $_countdownSeconds сек.",
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style: TextStyle(
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color: colors.onSurfaceVariant,
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fontSize: 16,
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fontWeight: FontWeight.w500,
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),
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),
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],
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),
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],
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),
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);
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}
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@override
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Widget build(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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return Scaffold(
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appBar: AppBar(title: const Text("Вход по QR-коду")),
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body: Padding(
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padding: const EdgeInsets.all(24.0),
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child: Column(
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children: [
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Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: colors.errorContainer.withOpacity(0.3),
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borderRadius: BorderRadius.circular(12),
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),
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child: const Row(
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children: [
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Icon(Icons.gpp_bad_outlined, color: Colors.red, size: 32),
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SizedBox(width: 16),
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Expanded(
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child: Text(
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"Любой, кто отсканирует этот код, получит полный доступ к вашему аккаунту. Не показывайте его посторонним.",
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style: TextStyle(fontWeight: FontWeight.w500),
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),
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),
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],
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),
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),
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const Spacer(),
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_buildContent(),
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const Spacer(flex: 2),
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],
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),
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),
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);
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}
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}
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