Persist H5 WebView login state

lib/main.dart

@@ -17,28 +17,16 @@ const _shellAccent = Color(0xFF168CFF);
 const _shellAccentDeep = Color(0xFF0066D9);
 const _shellInk = Color(0xFF17233D);
 const _shellSubText = Color(0xFF7C8AA3);
-const _shellBrandingChannel =
-    MethodChannel('io.openim.flutter.im_webview_app/shell_branding');
-const _androidFilePickerChannel =
-    MethodChannel('io.openim.flutter.openim/file_picker');
-const _h5CacheChannel =
-    MethodChannel('io.openim.flutter.im_webview_app/h5_cache');
+const _shellBrandingChannel = MethodChannel(
+  'io.openim.flutter.im_webview_app/shell_branding',
+);
+const _androidFilePickerChannel = MethodChannel(
+  'io.openim.flutter.openim/file_picker',
+);
 const _keyboardAnimationDuration = Duration(milliseconds: 250);
-const _initialH5CacheClearedKey = 'initial_h5_cache_cleared_v1';
-const _h5DomainCacheDateKey = 'h5_random_domain_date_v1';
-const _h5DomainCacheSessionKey = 'h5_random_domain_session_v1';
 const _h5DomainCacheUrlKey = 'h5_random_domain_url_v1';
 const _lineProbeTimeout = Duration(seconds: 5);
 const _maxGeneratedLineAttempts = 6;
-final String _h5DomainProcessSession =
-    'session-${DateTime.now().microsecondsSinceEpoch}';
-
-String _domainDateKey(DateTime value) {
-  final year = value.year.toString().padLeft(4, '0');
-  final month = value.month.toString().padLeft(2, '0');
-  final day = value.day.toString().padLeft(2, '0');
-  return '$year-$month-$day';
-}
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -54,10 +42,7 @@ Future<void> main() async {
 }
 
 class ShellBranding {
-  const ShellBranding({
-    required this.appName,
-    required this.appLogo,
-  });
+  const ShellBranding({required this.appName, required this.appLogo});
 
   static const fallback = ShellBranding(
     appName: AppConfig.appName,
@@ -69,8 +54,9 @@ class ShellBranding {
 
   static Future<ShellBranding> load() async {
     try {
-      final data = await _shellBrandingChannel
-          .invokeMapMethod<String, String>('getShellBranding');
+      final data = await _shellBrandingChannel.invokeMapMethod<String, String>(
+        'getShellBranding',
+      );
       final appName = _trim(data?['appName']);
       final appLogo = _trim(data?['appLogo']);
 
@@ -86,17 +72,10 @@ class ShellBranding {
   static String _trim(String? value) => value?.trim() ?? '';
 }
 
-enum _LineAvailability {
-  checking,
-  available,
-  unavailable,
-}
+enum _LineAvailability { checking, available, unavailable }
 
 class ImWebViewApp extends StatelessWidget {
-  const ImWebViewApp({
-    super.key,
-    this.shellBranding = ShellBranding.fallback,
-  });
+  const ImWebViewApp({super.key, this.shellBranding = ShellBranding.fallback});
 
   final ShellBranding shellBranding;
 
@@ -137,9 +116,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
   int _lineGeneration = 0;
   int _h5LineAttempt = 0;
   late ShellBranding _shellBranding;
-  Future<void>? _cacheClearTask;
-  Timer? _domainExpiryTimer;
-  String _activeDomainDateKey = '';
 
   _H5LineWebViewSlot get _currentSlot => _lineSlot;
 
@@ -150,7 +126,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
     _h5Line = AppConfig.h5Line;
     _shellBranding = widget.initialShellBranding;
     _lineSlot = _createLineSlot(_h5Line);
-    _scheduleDomainExpiryTimer();
     unawaited(_initializeLines());
   }
 
@@ -171,17 +146,13 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
       ..setJavaScriptMode(JavaScriptMode.unrestricted)
       ..addJavaScriptChannel(
         'OpenIMShell',
-        onMessageReceived: (message) => _handleShellMessage(
-          generation,
-          message,
-        ),
+        onMessageReceived: (message) =>
+            _handleShellMessage(generation, message),
       )
       ..addJavaScriptChannel(
         'OpenIMFlutterShell',
-        onMessageReceived: (message) => _handleFlutterShellMessage(
-          generation,
-          message,
-        ),
+        onMessageReceived: (message) =>
+            _handleFlutterShellMessage(generation, message),
       )
       ..setBackgroundColor(Colors.white)
       ..setNavigationDelegate(
@@ -252,14 +223,12 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
     }
 
     try {
-      final result = await _androidFilePickerChannel.invokeListMethod<String>(
-        'pickFiles',
-        {
-          'acceptTypes': params.acceptTypes,
-          'allowMultiple': params.mode == FileSelectorMode.openMultiple,
-          'capture': params.isCaptureEnabled,
-        },
-      );
+      final result = await _androidFilePickerChannel
+          .invokeListMethod<String>('pickFiles', {
+        'acceptTypes': params.acceptTypes,
+        'allowMultiple': params.mode == FileSelectorMode.openMultiple,
+        'capture': params.isCaptureEnabled,
+      });
       return result ?? <String>[];
     } catch (_) {
       return <String>[];
@@ -269,7 +238,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
   @override
   void dispose() {
     WidgetsBinding.instance.removeObserver(this);
-    _domainExpiryTimer?.cancel();
     _lineSlot.dispose();
     super.dispose();
   }
@@ -277,12 +245,13 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
     if (state == AppLifecycleState.resumed) {
-      unawaited(_refreshExpiredH5LinesIfNeeded());
+      unawaited(_syncShellRequestUrl());
+      unawaited(_syncShellBranding());
+      unawaited(_syncKeyboardState());
     }
   }
 
   Future<void> _initializeLines() async {
-    await _clearInitialH5CachesIfNeeded();
     await _prepareAndLoadH5Line(forceNew: false);
   }
 
@@ -307,7 +276,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
           _isPreparingInitialLine = false;
         });
         await _loadCurrentLine(forceReload: true);
-        _scheduleDomainExpiryTimer();
         return;
       }
 
@@ -323,40 +291,25 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
       _currentSlot.loadError = '当前线路暂不可用，请稍后重试';
       _currentSlot.showShellCover = false;
     });
-    _scheduleDomainExpiryTimer();
   }
 
-  Future<H5Line> _loadCachedOrCreateH5Line({
-    required bool forceNew,
-  }) async {
-    final today = _domainDateKey(DateTime.now());
-    _activeDomainDateKey = today;
-
+  Future<H5Line> _loadCachedOrCreateH5Line({required bool forceNew}) async {
     try {
       final preferences = await SharedPreferences.getInstance();
       final cachedUrl = preferences.getString(_h5DomainCacheUrlKey);
       final cachedLine =
           cachedUrl == null ? null : AppConfig.h5LineFromUrl(cachedUrl);
-      final canUseCachedLine = !forceNew &&
-          preferences.getString(_h5DomainCacheDateKey) == today &&
-          preferences.getString(_h5DomainCacheSessionKey) ==
-              _h5DomainProcessSession &&
-          cachedLine != null;
+      final canUseCachedLine = !forceNew && cachedLine != null;
 
       if (canUseCachedLine) {
-        _logH5Line('复用本进程当天随机线路', cachedLine);
+        _logH5Line('复用已保存 H5 线路', cachedLine);
         return cachedLine;
       }
 
       final line = AppConfig.createRandomH5Line(attempt: _h5LineAttempt);
       _h5LineAttempt += 1;
-      await preferences.setString(_h5DomainCacheDateKey, today);
-      await preferences.setString(
-        _h5DomainCacheSessionKey,
-        _h5DomainProcessSession,
-      );
       await preferences.setString(_h5DomainCacheUrlKey, line.url);
-      _logH5Line('生成当天随机线路', line);
+      _logH5Line('生成并保存 H5 线路', line);
       return line;
     } catch (_) {
       final line = AppConfig.createRandomH5Line(attempt: _h5LineAttempt);
@@ -366,132 +319,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
     }
   }
 
-  Future<void> _refreshExpiredH5LinesIfNeeded() async {
-    final today = _domainDateKey(DateTime.now());
-    if (_isPreparingInitialLine || _activeDomainDateKey == today) {
-      _scheduleDomainExpiryTimer();
-      return;
-    }
-
-    if (mounted) {
-      setState(() {
-        _isPreparingInitialLine = true;
-      });
-    }
-
-    await _clearAllH5Caches();
-    await _prepareAndLoadH5Line(forceNew: true);
-  }
-
-  void _scheduleDomainExpiryTimer() {
-    _domainExpiryTimer?.cancel();
-
-    final now = DateTime.now();
-    final nextMidnight = DateTime(now.year, now.month, now.day + 1);
-    final delay = nextMidnight.difference(now) + const Duration(seconds: 1);
-    _domainExpiryTimer = Timer(
-      delay,
-      () => unawaited(_refreshExpiredH5LinesIfNeeded()),
-    );
-  }
-
-  Future<void> _clearInitialH5CachesIfNeeded() async {
-    try {
-      final preferences = await SharedPreferences.getInstance();
-      if (preferences.getBool(_initialH5CacheClearedKey) == true) {
-        return;
-      }
-
-      await _clearAllH5Caches();
-      await preferences.setBool(_initialH5CacheClearedKey, true);
-    } catch (_) {
-      await _clearAllH5Caches();
-    }
-  }
-
-  Future<void> _clearAllH5Caches() {
-    final runningTask = _cacheClearTask;
-    if (runningTask != null) {
-      return runningTask;
-    }
-
-    final task = _clearAllH5CachesInternal();
-    _cacheClearTask = task;
-    return task.whenComplete(() {
-      if (identical(_cacheClearTask, task)) {
-        _cacheClearTask = null;
-      }
-    });
-  }
-
-  Future<void> _clearAllH5CachesInternal() async {
-    await _clearNativeH5WebsiteData();
-    await _clearCookiesSafely();
-    await _clearPageStorage(_lineSlot.controller);
-    await _clearControllerStorage(_lineSlot.controller);
-  }
-
-  Future<void> _clearNativeH5WebsiteData() async {
-    try {
-      await _h5CacheChannel.invokeMethod<void>('clearAllWebsiteData');
-    } catch (_) {
-      // Older native shells may not expose the cache channel yet.
-    }
-  }
-
-  Future<void> _clearCookiesSafely() async {
-    try {
-      await WebViewCookieManager().clearCookies();
-    } catch (_) {
-      // Cookie clearing is best-effort across platform WebView implementations.
-    }
-  }
-
-  Future<void> _clearControllerStorage(WebViewController controller) async {
-    try {
-      await controller.clearCache();
-    } catch (_) {}
-
-    try {
-      await controller.clearLocalStorage();
-    } catch (_) {}
-  }
-
-  Future<void> _clearPageStorage(WebViewController controller) async {
-    const script = '''
-(() => {
-  try {
-    if ('caches' in window) {
-      caches.keys().then((keys) => Promise.all(keys.map((key) => caches.delete(key))));
-    }
-  } catch (_) {}
-  try {
-    if ('serviceWorker' in navigator) {
-      navigator.serviceWorker.getRegistrations()
-        .then((items) => Promise.all(items.map((item) => item.unregister())));
-    }
-  } catch (_) {}
-  try {
-    if (typeof indexedDB !== 'undefined' && indexedDB.databases) {
-      indexedDB.databases().then((databases) => {
-        databases.forEach((database) => {
-          if (database && database.name) {
-            indexedDB.deleteDatabase(database.name);
-          }
-        });
-      });
-    }
-  } catch (_) {}
-  try { window.localStorage.clear(); } catch (_) {}
-  try { window.sessionStorage.clear(); } catch (_) {}
-})();
-''';
-
-    try {
-      await controller.runJavaScript(script);
-    } catch (_) {}
-  }
-
   Future<bool> _probeCurrentLine() async {
     final generation = _lineGeneration;
     final line = _lineSlot.line;
@@ -907,7 +734,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
 
     _isReplacingUnavailableLine = true;
     try {
-      await _clearAllH5Caches();
       if (mounted) {
         setState(() {
           _isPreparingInitialLine = true;
@@ -1050,9 +876,7 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
                     Positioned.fill(
                       child: _ShellFallback(progress: currentSlot.progress),
                     ),
-                  Positioned.fill(
-                    child: _buildWebViewWidget(),
-                  ),
+                  Positioned.fill(child: _buildWebViewWidget()),
                   if (currentSlot.showShellCover &&
                       !currentSlot.hasPresentedFirstScreen)
                     Positioned.fill(
@@ -1107,10 +931,7 @@ class _NativeMediaPermissionResult {
 }
 
 class _H5LineWebViewSlot {
-  _H5LineWebViewSlot({
-    required this.line,
-    required this.controller,
-  });
+  _H5LineWebViewSlot({required this.line, required this.controller});
 
   final H5Line line;
   final WebViewController controller;
@@ -1159,10 +980,7 @@ class _ErrorPanel extends StatelessWidget {
                 style: Theme.of(context).textTheme.bodyMedium,
               ),
               const SizedBox(height: 20),
-              FilledButton(
-                onPressed: onRetry,
-                child: const Text('重新加载'),
-              ),
+              FilledButton(onPressed: onRetry, child: const Text('重新加载')),
             ],
           ),
         ),
@@ -1188,8 +1006,10 @@ class _ShellFallback extends StatelessWidget {
         builder: (context, constraints) {
           final markSize = (constraints.maxWidth * 0.34).clamp(116.0, 148.0);
           final contentTop = constraints.maxHeight * 0.28;
-          final progressWidth =
-              (constraints.maxWidth * 0.32).clamp(116.0, 152.0);
+          final progressWidth = (constraints.maxWidth * 0.32).clamp(
+            116.0,
+            152.0,
+          );
 
           return Align(
             alignment: Alignment.topCenter,
@@ -1318,11 +1138,7 @@ class _H5LoadingBackgroundPainter extends CustomPainter {
       ..shader = const LinearGradient(
         begin: Alignment.topCenter,
         end: Alignment.bottomCenter,
-        colors: [
-          Color(0xFFEAF7FF),
-          Color(0xFFF8FCFF),
-          Colors.white,
-        ],
+        colors: [Color(0xFFEAF7FF), Color(0xFFF8FCFF), Colors.white],
         stops: [0, 0.52, 1],
       ).createShader(pageRect);
     canvas.drawRect(pageRect, pagePaint);
@@ -1471,10 +1287,7 @@ class _BubbleCheckPainter extends CustomPainter {
       ..shader = const LinearGradient(
         begin: Alignment.topLeft,
         end: Alignment.bottomRight,
-        colors: [
-          Color(0xFFE8FBF8),
-          Color(0xFFAEECE4),
-        ],
+        colors: [Color(0xFFE8FBF8), Color(0xFFAEECE4)],
       ).createShader(backBubble.outerRect);
     canvas.drawRRect(backBubble, backBubblePaint);
 
@@ -1499,11 +1312,7 @@ class _BubbleCheckPainter extends CustomPainter {
       ..shader = const LinearGradient(
         begin: Alignment.topLeft,
         end: Alignment.bottomRight,
-        colors: [
-          Color(0xFFA8DDFF),
-          _shellAccent,
-          _shellAccentDeep,
-        ],
+        colors: [Color(0xFFA8DDFF), _shellAccent, _shellAccentDeep],
         stops: [0, 0.48, 1],
       ).createShader(frontRect);
     canvas.drawPath(frontTail, bubblePaint);