startup: Add beta-complete dialog

lib/widgets/app.dart

@@ -160,6 +160,10 @@ class _ZulipAppState extends State<ZulipApp> with WidgetsBindingObserver {
   void initState() {
     super.initState();
     WidgetsBinding.instance.addObserver(this);
+
+    // On every startup is fine; the goal is to be assertive but stop short of a
+    // rug-pull where we just disable all the app's features.
+    showBetaCompleteDialog();
   }
 
   @override

lib/widgets/dialog.dart

@@ -1,7 +1,11 @@
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 import '../generated/l10n/zulip_localizations.dart';
 import 'actions.dart';
+import 'app.dart';
 
 Widget _dialogActionText(String text) {
   return Text(
@@ -112,3 +116,75 @@ DialogStatus<bool> showSuggestedActionDialog({
       ]));
   return DialogStatus(future);
 }
+
+bool debugDisableBetaCompleteDialog = false;
+void resetDebugDisableBetaCompleteDialog() {
+  debugDisableBetaCompleteDialog = false;
+}
+
+/// Show a brief dialog box saying that this beta channel has ended,
+/// offering a way to get the app from prod.
+void showBetaCompleteDialog() async {
+  if (debugDisableBetaCompleteDialog) return;
+
+  final navigator = await ZulipApp.navigator;
+  final context = navigator.context;
+  assert(context.mounted);
+  if (!context.mounted) return; // TODO(linter): this is impossible as there's no actual async gap, but the use_build_context_synchronously lint doesn't see that
+
+  switch (defaultTargetPlatform) {
+    case TargetPlatform.android:
+    case TargetPlatform.iOS:
+      break;
+    case TargetPlatform.macOS:
+    case TargetPlatform.fuchsia:
+    case TargetPlatform.linux:
+    case TargetPlatform.windows:
+      // Do nothing on these unsupported platforms.
+      return;
+  }
+
+  final zulipLocalizations = ZulipLocalizations.of(context);
+
+  final message = 'Since Zulip’s new Flutter app has launched, this beta app is no longer maintained. We strongly recommend uninstalling it and switching to the main Zulip application to get the latest features and bug fixes. Thank you for being a beta tester!';
+
+  unawaited(showDialog(
+    context: context,
+    builder: (BuildContext context) => AlertDialog(
+      title: Text('Time to switch to the new app'),
+      content: SingleChildScrollView(child: Text(message)),
+      actions: [
+        TextButton(
+          onPressed: () => Navigator.pop(context),
+          child: _dialogActionText('Got it')),
+        ...(switch (defaultTargetPlatform) {
+            TargetPlatform.android => [
+              TextButton(
+                onPressed: () {
+                  Navigator.pop(context);
+                  PlatformActions.launchUrl(context,
+                    Uri.parse('https://github.com/zulip/zulip-flutter/releases/latest'));
+                },
+                child: _dialogActionText('Download official APKs (less common)')),
+              TextButton(
+                onPressed: () {
+                  Navigator.pop(context);
+                  PlatformActions.launchUrl(context,
+                    Uri.parse('https://play.google.com/store/apps/details?id=com.zulipmobile'));
+                },
+                child: _dialogActionText('Open Google Play Store'))
+            ],
+            TargetPlatform.iOS => [
+              TextButton(
+                onPressed: () {
+                  Navigator.pop(context);
+                  PlatformActions.launchUrl(context,
+                    Uri.parse('https://apps.apple.com/app/zulip/id1203036395'));
+                },
+                child: _dialogActionText('Open App Store')),
+            ],
+            TargetPlatform.macOS || TargetPlatform.fuchsia
+              || TargetPlatform.linux || TargetPlatform.windows => throw UnimplementedError(),
+          }),
+      ])));
+}

test/notifications/open_test.dart

@@ -13,6 +13,7 @@ import 'package:zulip/model/narrow.dart';
 import 'package:zulip/notifications/open.dart';
 import 'package:zulip/notifications/receive.dart';
 import 'package:zulip/widgets/app.dart';
+import 'package:zulip/widgets/dialog.dart';
 import 'package:zulip/widgets/home.dart';
 import 'package:zulip/widgets/message_list.dart';
 import 'package:zulip/widgets/page.dart';
@@ -76,6 +77,8 @@ void main() {
   final zulipLocalizations = GlobalLocalizations.zulipLocalizations;
 
   Future<void> init({bool addSelfAccount = true}) async {
+    debugDisableBetaCompleteDialog = true;
+    addTearDown(resetDebugDisableBetaCompleteDialog);
     if (addSelfAccount) {
       await testBinding.globalStore.add(eg.selfAccount, eg.initialSnapshot());
     }

test/widgets/app_test.dart

@@ -7,6 +7,7 @@ import 'package:zulip/log.dart';
 import 'package:zulip/model/actions.dart';
 import 'package:zulip/model/database.dart';
 import 'package:zulip/widgets/app.dart';
+import 'package:zulip/widgets/dialog.dart';
 import 'package:zulip/widgets/home.dart';
 import 'package:zulip/widgets/page.dart';
 
@@ -27,6 +28,8 @@ void main() {
     late List<Route<dynamic>> pushedRoutes = [];
 
     Future<void> prepare(WidgetTester tester) async {
+      debugDisableBetaCompleteDialog = true;
+      addTearDown(resetDebugDisableBetaCompleteDialog);
       addTearDown(testBinding.reset);
 
       pushedRoutes = [];
@@ -64,6 +67,8 @@ void main() {
     late List<Route<void>> poppedRoutes;
 
     Future<void> prepare(WidgetTester tester) async {
+      debugDisableBetaCompleteDialog = true;
+      addTearDown(resetDebugDisableBetaCompleteDialog);
       addTearDown(testBinding.reset);
 
       pushedRoutes = [];
@@ -279,6 +284,8 @@ void main() {
     });
 
     testWidgets('choosing an account clears the navigator stack', (tester) async {
+      debugDisableBetaCompleteDialog = true;
+      addTearDown(resetDebugDisableBetaCompleteDialog);
       addTearDown(testBinding.reset);
       await testBinding.globalStore.add(eg.selfAccount, eg.initialSnapshot());
       await testBinding.globalStore.add(eg.otherAccount, eg.initialSnapshot());
@@ -391,6 +398,8 @@ void main() {
     });
 
     testWidgets('reportErrorToUserBriefly with details', (tester) async {
+      debugDisableBetaCompleteDialog = true;
+      addTearDown(resetDebugDisableBetaCompleteDialog);
       addTearDown(testBinding.reset);
       await tester.pumpWidget(const ZulipApp());
       const message = 'test error message';
@@ -418,6 +427,8 @@ void main() {
     });
 
     Future<void> prepareSnackBarWithDetails(WidgetTester tester, String message, String details) async {
+      debugDisableBetaCompleteDialog = true;
+      addTearDown(resetDebugDisableBetaCompleteDialog);
       addTearDown(testBinding.reset);
       await tester.pumpWidget(const ZulipApp());
       await tester.pump();
@@ -484,6 +495,8 @@ void main() {
     });
 
     testWidgets('reportErrorToUserModally', (tester) async {
+      debugDisableBetaCompleteDialog = true;
+      addTearDown(resetDebugDisableBetaCompleteDialog);
       addTearDown(testBinding.reset);
       await tester.pumpWidget(const ZulipApp());
       const title = 'test title';

test/widgets/home_test.dart

@@ -8,6 +8,7 @@ import 'package:zulip/model/store.dart';
 import 'package:zulip/widgets/about_zulip.dart';
 import 'package:zulip/widgets/app.dart';
 import 'package:zulip/widgets/app_bar.dart';
+import 'package:zulip/widgets/dialog.dart';
 import 'package:zulip/widgets/home.dart';
 import 'package:zulip/widgets/icons.dart';
 import 'package:zulip/widgets/inbox.dart';
@@ -48,6 +49,8 @@ void main () {
     ..onPopped = ((route, prevRoute) => lastPoppedRoute = route);
 
   Future<void> prepare(WidgetTester tester) async {
+    debugDisableBetaCompleteDialog = true;
+    addTearDown(resetDebugDisableBetaCompleteDialog);
     addTearDown(testBinding.reset);
     topRoute = null;
     previousTopRoute = null;
@@ -272,6 +275,8 @@ void main () {
     });
 
     testWidgets('menu buttons dismiss the menu', (tester) async {
+      debugDisableBetaCompleteDialog = true;
+      addTearDown(resetDebugDisableBetaCompleteDialog);
       addTearDown(testBinding.reset);
       topRoute = null;
       previousTopRoute = null;
@@ -328,6 +333,8 @@ void main () {
     }
 
     Future<void> prepare(WidgetTester tester) async {
+      debugDisableBetaCompleteDialog = true;
+      addTearDown(resetDebugDisableBetaCompleteDialog);
       addTearDown(testBinding.reset);
       topRoute = null;
       previousTopRoute = null;
@@ -521,6 +528,8 @@ void main () {
   });
 
   testWidgets('logging out while still loading', (tester) async {
+    debugDisableBetaCompleteDialog = true;
+    addTearDown(resetDebugDisableBetaCompleteDialog);
     // Regression test for: https://github.com/zulip/zulip-flutter/issues/1219
     addTearDown(testBinding.reset);
     await testBinding.globalStore.add(eg.selfAccount, eg.initialSnapshot());
@@ -537,6 +546,8 @@ void main () {
   });
 
   testWidgets('logging out after fully loaded', (tester) async {
+    debugDisableBetaCompleteDialog = true;
+    addTearDown(resetDebugDisableBetaCompleteDialog);
     // Regression test for: https://github.com/zulip/zulip-flutter/issues/1219
     addTearDown(testBinding.reset);
     await testBinding.globalStore.add(eg.selfAccount, eg.initialSnapshot());

test/widgets/login_test.dart

@@ -12,6 +12,7 @@ import 'package:zulip/model/binding.dart';
 import 'package:zulip/model/database.dart';
 import 'package:zulip/model/localizations.dart';
 import 'package:zulip/widgets/app.dart';
+import 'package:zulip/widgets/dialog.dart';
 import 'package:zulip/widgets/home.dart';
 import 'package:zulip/widgets/login.dart';
 import 'package:zulip/widgets/page.dart';
@@ -83,6 +84,8 @@ void main() {
 
     Future<void> prepare(WidgetTester tester,
         GetServerSettingsResult serverSettings) async {
+      debugDisableBetaCompleteDialog = true;
+      addTearDown(resetDebugDisableBetaCompleteDialog);
       addTearDown(testBinding.reset);
 
       connection = testBinding.globalStore.apiConnection(

test/widgets/message_list_test.dart

@@ -26,6 +26,7 @@ import 'package:zulip/widgets/autocomplete.dart';
 import 'package:zulip/widgets/color.dart';
 import 'package:zulip/widgets/compose_box.dart';
 import 'package:zulip/widgets/content.dart';
+import 'package:zulip/widgets/dialog.dart';
 import 'package:zulip/widgets/icons.dart';
 import 'package:zulip/widgets/message_list.dart';
 import 'package:zulip/widgets/page.dart';
@@ -73,6 +74,8 @@ void main() {
     bool skipAssertAccountExists = false,
     bool skipPumpAndSettle = false,
   }) async {
+    debugDisableBetaCompleteDialog = true;
+    addTearDown(resetDebugDisableBetaCompleteDialog);
     TypingNotifier.debugEnable = false;
     addTearDown(TypingNotifier.debugReset);
     addTearDown(testBinding.reset);