✨ iOS background widget fetching

lib/main.dart

@@ -37,6 +37,24 @@ import 'package:surface/types/realm.dart';
 import 'package:flutter_web_plugins/url_strategy.dart' show usePathUrlStrategy;
 import 'package:surface/widgets/dialog.dart';
 import 'package:surface/widgets/version_label.dart';
+import 'package:workmanager/workmanager.dart';
+
+@pragma('vm:entry-point')
+void appBackgroundDispatcher() {
+  Workmanager().executeTask((task, inputData) async {
+    print("Native called background task: $task");
+    switch (task) {
+      case Workmanager.iOSBackgroundTask:
+        await Future.wait([widgetUpdateRandomPost()]);
+        return true;
+      case "WidgetUpdateRandomPost":
+        await widgetUpdateRandomPost();
+        return true;
+      default:
+        return true;
+    }
+  });
+}
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -64,6 +82,20 @@ void main() async {
     });
   }
 
+  if (!kIsWeb && (Platform.isAndroid || Platform.isIOS)) {
+    Workmanager().initialize(
+      appBackgroundDispatcher,
+      isInDebugMode: kDebugMode,
+    );
+    Workmanager().registerPeriodicTask(
+      "widget-update-random-post",
+      "WidgetUpdateRandomPost",
+      frequency: Duration(minutes: 1),
+      constraints: Constraints(networkType: NetworkType.connected),
+      tag: "widget-update",
+    );
+  }
+
   runApp(const SolianApp());
 }
 
@@ -193,10 +225,14 @@ class _AppSplashScreenState extends State<_AppSplashScreen> {
     }
   }
 
+  Future<void> _postInitialization() async {
+    await widgetUpdateRandomPost();
+  }
+
   @override
   void initState() {
     super.initState();
-    _initialize();
+    _initialize().then((_) => _postInitialization());
   }
 
   @override

lib/providers/sn_network.dart

@@ -71,7 +71,36 @@ class SnNetworkProvider {
     });
   }
 
-  Future<void> initializeUserAgent() async {
+  static Future<Dio> createOffContextClient() async {
+    final prefs = await SharedPreferences.getInstance();
+    final client = Dio();
+    client.interceptors.add(RetryInterceptor(
+      dio: client,
+      retries: 3,
+      retryDelays: const [
+        Duration(milliseconds: 300),
+        Duration(milliseconds: 1000),
+        Duration(milliseconds: 3000),
+      ],
+    ));
+    final ua = await _getUserAgent();
+    client.interceptors.add(
+      InterceptorsWrapper(
+        onRequest: (
+          RequestOptions options,
+          RequestInterceptorHandler handler,
+        ) async {
+          options.headers['User-Agent'] = ua;
+          return handler.next(options);
+        },
+      ),
+    );
+    client.options.baseUrl = prefs.getString(kNetworkServerStoreKey) ?? kNetworkServerDefault;
+
+    return client;
+  }
+
+  static Future<String> _getUserAgent() async {
     final String platformInfo;
     if (kIsWeb) {
       final deviceInfo = await DeviceInfoPlugin().webBrowserInfo;
@@ -97,7 +126,11 @@ class SnNetworkProvider {
 
     final packageInfo = await PackageInfo.fromPlatform();
 
-    _userAgent = 'Solian/${packageInfo.version}+${packageInfo.buildNumber} ($platformInfo)';
+    return 'Solian/${packageInfo.version}+${packageInfo.buildNumber} ($platformInfo)';
+  }
+
+  Future<void> initializeUserAgent() async {
+    _userAgent = await _getUserAgent();
   }
 
   final tkLock = Lock();

lib/providers/widget.dart

@@ -4,6 +4,8 @@ import 'dart:io';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:home_widget/home_widget.dart';
+import 'package:surface/providers/sn_network.dart';
+import 'package:surface/types/post.dart';
 
 class HomeWidgetProvider {
   HomeWidgetProvider(BuildContext context);
@@ -15,8 +17,7 @@ class HomeWidgetProvider {
     }
   }
 
-  Future<void> saveWidgetData(String id, dynamic data,
-      {bool update = true}) async {
+  Future<void> saveWidgetData(String id, dynamic data, {bool update = true}) async {
     if (kIsWeb || !(Platform.isAndroid || Platform.isIOS)) return;
     await HomeWidget.saveWidgetData(id, jsonEncode(data));
     if (update) await updateWidget();
@@ -25,7 +26,7 @@ class HomeWidgetProvider {
   Future<void> updateWidget() async {
     if (kIsWeb || !(Platform.isAndroid || Platform.isIOS)) return;
     if (Platform.isIOS) {
-      const widgets = ["SolarFeaturedPostWidget", "SolarCheckInWidget"];
+      const widgets = ["SolarRandomPostWidget", "SolarCheckInWidget"];
       for (final widget in widgets) {
         await HomeWidget.updateWidget(
           name: widget,
@@ -43,3 +44,16 @@ class HomeWidgetProvider {
     }
   }
 }
+
+Future<void> widgetUpdateRandomPost() async {
+  final snc = await SnNetworkProvider.createOffContextClient();
+  final resp = await snc.get('/cgi/co/recommendations/shuffle?take=1');
+  final post = SnPost.fromJson(resp.data['data'][0]);
+  await HomeWidget.saveWidgetData("int_random_post", jsonEncode(post.toJson()));
+  await HomeWidget.updateWidget(
+    name: "SolarRandomPostWidget",
+    iOSName: "SolarRandomPostWidget",
+    androidName: "FeaturedPostWidgetReceiver",
+    qualifiedAndroidName: "dev.solsynth.solian.widgets.FeaturedPostWidgetReceiver",
+  );
+}

lib/screens/home.dart

@@ -151,7 +151,7 @@ class _HomeDashCheckInWidgetState extends State<_HomeDashCheckInWidget> {
       final home = context.read<HomeWidgetProvider>();
       final resp = await sn.client.get('/cgi/id/check-in/today');
       _todayRecord = SnCheckInRecord.fromJson(resp.data);
-      home.saveWidgetData('today_check_in', _todayRecord!.toJson());
+      home.saveWidgetData('pas_check_in_record', _todayRecord!.toJson());
     } finally {
       setState(() => _isBusy = false);
     }
@@ -164,7 +164,7 @@ class _HomeDashCheckInWidgetState extends State<_HomeDashCheckInWidget> {
       final home = context.read<HomeWidgetProvider>();
       final resp = await sn.client.post('/cgi/id/check-in');
       _todayRecord = SnCheckInRecord.fromJson(resp.data);
-      home.saveWidgetData('today_check_in', _todayRecord!.toJson());
+      home.saveWidgetData('pas_check_in_record', _todayRecord!.toJson());
     } catch (err) {
       if (!mounted) return;
       context.showErrorDialog(err);