118 lines
3.5 KiB
Dart
118 lines
3.5 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:logging/logging.dart';
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import "package:photos/generated/l10n.dart";
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import 'package:photos/ui/common/gradient_button.dart';
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import 'package:photos/ui/tools/app_lock.dart';
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import 'package:photos/utils/auth_util.dart';
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class LockScreen extends StatefulWidget {
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const LockScreen({Key? key}) : super(key: key);
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@override
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State<LockScreen> createState() => _LockScreenState();
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}
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class _LockScreenState extends State<LockScreen> with WidgetsBindingObserver {
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final _logger = Logger("LockScreen");
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bool _isShowingLockScreen = false;
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bool _hasPlacedAppInBackground = false;
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bool _hasAuthenticationFailed = false;
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@override
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void initState() {
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_logger.info("initState");
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_showLockScreen();
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WidgetsBinding.instance.addObserver(this);
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super.initState();
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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body: Center(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.center,
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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children: [
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Stack(
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alignment: Alignment.center,
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children: [
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Opacity(
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opacity: 0.2,
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child: Image.asset('assets/loading_photos_background.png'),
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),
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SizedBox(
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width: 180,
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child: GradientButton(
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text: S.of(context).unlock,
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iconData: Icons.lock_open_outlined,
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onTap: () async {
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_showLockScreen();
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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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);
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}
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@override
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void didChangeAppLifecycleState(AppLifecycleState state) {
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_logger.info(state.toString());
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if (state == AppLifecycleState.resumed) {
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// This is triggered either when the lock screen is dismissed or when
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// the app is brought to foreground
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_hasPlacedAppInBackground = false;
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if (!_hasAuthenticationFailed) {
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// Show the lock screen again only if the app is resuming from the
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// background, and not when the lock screen was explicitly dismissed
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_showLockScreen();
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} else {
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_hasAuthenticationFailed = false; // Reset failure state
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}
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} else if (state == AppLifecycleState.paused ||
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state == AppLifecycleState.inactive) {
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// This is triggered either when the lock screen pops up or when
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// the app is pushed to background
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if (!_isShowingLockScreen) {
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_hasPlacedAppInBackground = true;
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_hasAuthenticationFailed = false; // reset failure state
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}
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}
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}
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@override
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void dispose() {
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WidgetsBinding.instance.removeObserver(this);
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super.dispose();
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}
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Future<void> _showLockScreen() async {
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_logger.info("Showing lock screen");
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try {
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_isShowingLockScreen = true;
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final result = await requestAuthentication(
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context,
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S.of(context).authToViewYourMemories,
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);
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_isShowingLockScreen = false;
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if (result) {
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AppLock.of(context)!.didUnlock();
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} else {
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_logger.info("Dismissed");
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if (!_hasPlacedAppInBackground) {
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// Treat this as a failure only if user did not explicitly
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// put the app in background
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_hasAuthenticationFailed = true;
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_logger.info("Authentication failed");
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}
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}
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} catch (e, s) {
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_logger.severe(e, s);
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}
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}
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}
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