fix: Enable gotify recommendations

lib/config/app_config.dart

@@ -16,6 +16,7 @@ abstract class AppConfig {
   static const Color secondaryColor = Color(0xFF41a2bc);
   static String _privacyUrl = 'https://fluffychat.im/en/privacy.html';
   static String get privacyUrl => _privacyUrl;
+  static const String enablePushTutorial = 'https://fluffychat.im/en/push.html';
   static const String appId = 'im.fluffychat.FluffyChat';
   static const String appOpenUrlScheme = 'im.fluffychat';
   static String _webBaseUrl = 'https://fluffychat.im/web';

lib/utils/background_push.dart

@@ -51,8 +51,7 @@ class BackgroundPush {
   BuildContext context;
   GlobalKey<VRouterState> router;
   String _fcmToken;
-  LoginState _loginState;
-  void Function(String errorMsg) onFcmError;
+  void Function(String errorMsg, {Uri link}) onFcmError;
   L10n l10n;
   Store _store;
   Store get store => _store ??= Store();
@@ -95,7 +94,7 @@ class BackgroundPush {
 
   factory BackgroundPush(
       Client _client, BuildContext _context, GlobalKey<VRouterState> router,
-      {final void Function(String errorMsg) onFcmError}) {
+      {final void Function(String errorMsg, {Uri link}) onFcmError}) {
     final instance = BackgroundPush.clientOnly(_client);
     instance.context = _context;
     instance.router = router;
@@ -109,7 +108,6 @@ class BackgroundPush {
   }
 
   void handleLoginStateChanged(LoginState state) {
-    _loginState = state;
     setupPush();
   }
 
@@ -217,7 +215,7 @@ class BackgroundPush {
 
   Future<void> setupPush() async {
     await setupLocalNotificationsPlugin();
-    if (_loginState != LoginState.loggedIn ||
+    if (client.loginState != LoginState.loggedIn ||
         !PlatformInfos.isMobile ||
         context == null) {
       return;
@@ -250,9 +248,15 @@ class BackgroundPush {
     }
     if (await store.getItemBool(SettingKeys.showNoGoogle, true)) {
       await loadLocale();
-      onFcmError?.call(PlatformInfos.isAndroid
-          ? l10n.noGoogleServicesWarning
-          : l10n.oopsPushError);
+      if (PlatformInfos.isAndroid) {
+        onFcmError?.call(
+          l10n.noGoogleServicesWarning,
+          link: Uri.parse(
+            AppConfig.enablePushTutorial,
+          ),
+        );
+      }
+      onFcmError?.call(l10n.oopsPushError);
 
       if (null == await store.getItem(SettingKeys.showNoGoogle)) {
         await store.setItemBool(SettingKeys.showNoGoogle, false);

lib/widgets/matrix.dart

@@ -519,8 +519,22 @@ class MatrixState extends State<Matrix> with WidgetsBindingObserver {
         client,
         context,
         widget.router,
-        onFcmError: (errorMsg) => ScaffoldMessenger.of(context)
-            .showSnackBar(SnackBar(content: Text(errorMsg))),
+        onFcmError: (errorMsg, {Uri link}) => Timer(
+          Duration(seconds: 1),
+          () {
+            final banner = SnackBar(
+              content: Text(errorMsg),
+              duration: Duration(seconds: 30),
+              action: link == null
+                  ? null
+                  : SnackBarAction(
+                      label: L10n.of(context).link,
+                      onPressed: () => launch(link.toString()),
+                    ),
+            );
+            ScaffoldMessenger.of(navigatorContext).showSnackBar(banner);
+          },
+        ),
       );
     }
   }