build local notification with downloaded image; PDF via local file

lib/main.dart

@@ -4,6 +4,7 @@ import 'dart:io';
 import 'package:app_links/app_links.dart';
 import 'package:bot_toast/bot_toast.dart';
 import 'package:firebase_core/firebase_core.dart';
+import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_downloader/flutter_downloader.dart';
@@ -46,6 +47,30 @@ Future<void> _backgroundCallbackHomeWidget(Uri? uri) async {
   }
 }
 
+/// Firebase background message handler.
+///
+/// Runs in a separate isolate when the app is killed/background and a
+/// data-only push arrives (which is how content-service broadcasts ship
+/// notifications now). Must be a top-level function annotated with
+/// `vm:entry-point` so Flutter's tree-shaker keeps it.
+@pragma('vm:entry-point')
+Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
+  WidgetsFlutterBinding.ensureInitialized();
+  try {
+    await Firebase.initializeApp(
+      options: DefaultFirebaseOptions.currentPlatform,
+    );
+  } catch (e) {
+    if (kDebugMode) print('bg handler: Firebase.initializeApp failed: $e');
+  }
+  try {
+    await NotificationService.initializeNotification();
+    await NotificationService.showFirebaseNotification(message);
+  } catch (e) {
+    if (kDebugMode) print('bg handler: showFirebaseNotification failed: $e');
+  }
+}
+
 void main() async {
   runZonedGuarded(
     () async {
@@ -89,6 +114,15 @@ void main() async {
           },
         );
 
+        // Register the background handler before any other Firebase
+        // messaging setup. Content-service ships data-only pushes so we
+        // need to build the notification ourselves when the app is killed.
+        if (!kIsWeb) {
+          FirebaseMessaging.onBackgroundMessage(
+            _firebaseMessagingBackgroundHandler,
+          );
+        }
+
         if (!kIsWeb) {
           await FirebaseApi().initNotification().timeout(
             const Duration(seconds: 5),

lib/models/notification_message.dart

@@ -6,6 +6,9 @@ class NotificationMessage {
   String? type;
   String? link;
   String? image;
+  // Remote cover image URL — set by content-service broadcasts. Used by the
+  // local notification builder to render a BigPictureStyle preview.
+  String? imageUrl;
   String? photo;
   String? groupKey;
   String? userId;
@@ -18,6 +21,7 @@ class NotificationMessage {
     this.type,
     this.link,
     this.image,
+    this.imageUrl,
     this.photo,
     this.groupKey,
     this.userId,
@@ -31,6 +35,7 @@ class NotificationMessage {
     type = json['type'];
     link = json['link'];
     image = json['image'];
+    imageUrl = json['imageUrl'];
     photo = json['photo'];
     groupKey = json['groupKey'];
     userId = json['userId'];
@@ -45,6 +50,7 @@ class NotificationMessage {
     data['type'] = type;
     data['link'] = link;
     data['image'] = image;
+    data['imageUrl'] = imageUrl;
     data['photo'] = photo;
     data['groupKey'] = groupKey;
     data['userId'] = userId;
@@ -60,6 +66,7 @@ class NotificationMessage {
     data['type'] = type ?? '';
     data['link'] = link ?? '';
     data['image'] = image ?? '';
+    data['imageUrl'] = imageUrl ?? '';
     data['photo'] = photo ?? '';
     data['userId'] = userId ?? '';
     return data;

lib/services/notification/notification_service.dart

@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'dart:io';
 
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:didvan/models/notification_message.dart';
@@ -8,6 +9,8 @@ import 'package:didvan/services/storage/storage.dart';
 import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/foundation.dart';
 import 'package:get/get.dart';
+import 'package:http/http.dart' as http;
+import 'package:path_provider/path_provider.dart';
 
 class NotificationService {
   static final FlutterLocalNotificationsPlugin
@@ -89,7 +92,9 @@ class NotificationService {
         print("Notification Type: ${data.notificationType}");
       }
 
-      if (data.notificationType!.contains('3')) {
+      // Widget-refresh pushes carry notificationType=3 and skip the UI.
+      if (data.notificationType == '3' ||
+          (data.notificationType?.contains('3') ?? false)) {
         if (kDebugMode) {
           print("Widget notification - calling fetchWidget()");
         }
@@ -105,8 +110,35 @@ class NotificationService {
     }
   }
 
+  /// Downloads [url] into a temp file and returns its absolute path. Used by
+  /// `BigPictureStyleInformation` which needs a local file path. Returns
+  /// null on any failure so we degrade to a no-image notification rather
+  /// than crashing.
+  static Future<String?> _downloadImageToTemp(String url) async {
+    try {
+      final res = await http.get(Uri.parse(url));
+      if (res.statusCode != 200) {
+        if (kDebugMode) {
+          print('image download failed: HTTP ${res.statusCode}');
+        }
+        return null;
+      }
+      final dir = await getTemporaryDirectory();
+      final file = File(
+        '${dir.path}/notif_${DateTime.now().millisecondsSinceEpoch}.img',
+      );
+      await file.writeAsBytes(res.bodyBytes, flush: true);
+      return file.path;
+    } catch (e) {
+      if (kDebugMode) print('image download exception: $e');
+      return null;
+    }
+  }
+
   static Future<void> showNotification(NotificationMessage data) async {
-    if (data.notificationType!.contains('2')) {
+    final notifType = data.notificationType ?? '';
+
+    if (notifType.contains('2')) {
       final String? storedValue = await StorageService.getValue(
           key: 'notification${AppInitializer.createNotificationId(data)}');
       if (storedValue != null) {
@@ -116,6 +148,26 @@ class NotificationService {
       }
     }
 
+    // Resolve the image we want on the notification.
+    //  - `data.imageUrl` is the new content-service broadcast field (remote
+    //    URL — must be downloaded into the cache before Android can render
+    //    it via BigPictureStyle).
+    //  - `data.image` is the legacy widget-update field (already a local
+    //    path).
+    String? bigPicturePath;
+    if (data.imageUrl != null && data.imageUrl!.isNotEmpty) {
+      bigPicturePath = await _downloadImageToTemp(data.imageUrl!);
+    } else if (data.image != null && data.image!.isNotEmpty) {
+      bigPicturePath = data.image;
+    }
+
+    // Pick the Android style:
+    //   - notificationType '1' (legacy "big news" push) → BigPictureStyle
+    //   - any push with a resolved image (content broadcasts) →
+    //     BigPictureStyle so the cover image shows up
+    //   - otherwise → MessagingStyle (compact)
+    final useBigPicture = notifType.contains('1') || bigPicturePath != null;
+
     final AndroidNotificationDetails androidPlatformChannelSpecifics =
         AndroidNotificationDetails(
       'content',
@@ -124,11 +176,11 @@ class NotificationService {
       importance: Importance.max,
       priority: Priority.high,
       playSound: true,
-      styleInformation: data.notificationType!.contains('1')
+      styleInformation: useBigPicture && bigPicturePath != null
           ? BigPictureStyleInformation(
-              FilePathAndroidBitmap(data.image ?? ''),
+              FilePathAndroidBitmap(bigPicturePath),
               contentTitle: data.title,
-              summaryText: "خبر جدید",
+              summaryText: data.body ?? '',
             )
           : MessagingStyleInformation(
               Person(name: data.title),
@@ -139,17 +191,21 @@ class NotificationService {
     final NotificationDetails platformChannelSpecifics =
         NotificationDetails(android: androidPlatformChannelSpecifics);
 
+    // Pass the full data map (incl. id/type/link/imageUrl) through the
+    // payload so the onTap handler can route correctly.
+    final payloadJson = jsonEncode(data.toJson());
+
     await _flutterLocalNotificationsPlugin.show(
-      data.notificationType!.contains('1')
+      useBigPicture
           ? DateTime.now().millisecondsSinceEpoch ~/ 1000
           : AppInitializer.createNotificationId(data),
       data.title,
       data.body,
       platformChannelSpecifics,
-      payload: data.toPayload().toString(),
+      payload: payloadJson,
     );
 
-    if (data.notificationType!.contains('2')) {
+    if (notifType.contains('2')) {
       await StorageService.setValue(
           key: 'notification${AppInitializer.createNotificationId(data)}',
           value: data.body);

lib/views/pdf_viewer/pdf_viewer_page.dart

@@ -1,8 +1,12 @@
+import 'dart:io';
+
 import 'package:didvan/views/widgets/didvan/text.dart';
 import 'package:flutter/material.dart';
 import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
 import 'package:flutter/foundation.dart';
 import 'package:didvan/services/network/request.dart';
+import 'package:http/http.dart' as http;
+import 'package:path_provider/path_provider.dart';
 import 'package:universal_html/html.dart' as html;
 
 class PdfViewerPage extends StatefulWidget {
@@ -24,6 +28,7 @@ class _PdfViewerPageState extends State<PdfViewerPage> {
   bool _isLoading = true;
   String? _errorMessage;
   late String _fullPdfUrl;
+  File? _localPdfFile;
 
   @override
   void initState() {
@@ -45,6 +50,52 @@ class _PdfViewerPageState extends State<PdfViewerPage> {
       WidgetsBinding.instance.addPostFrameCallback((_) {
         _openPdfInBrowser();
       });
+    } else {
+      // در موبایل: PDF را به temp دانلود می‌کنیم و سپس با SfPdfViewer.file
+      // نمایش می‌دهیم. SfPdfViewer.network با presigned URLهای Arvan که
+      // query params زیاد و امضای AWS دارند گاهی fail می‌شود؛ دانلود
+      // محلی این مشکل را دور می‌زند.
+      _downloadAndOpen();
+    }
+  }
+
+  Future<void> _downloadAndOpen() async {
+    try {
+      final headers = (_fullPdfUrl.contains('didvan.com') ||
+              _fullPdfUrl.contains('didvan.app'))
+          ? {'Authorization': 'Bearer ${RequestService.token}'}
+          : const <String, String>{};
+
+      final res = await http.get(Uri.parse(_fullPdfUrl), headers: headers);
+      if (res.statusCode != 200) {
+        if (mounted) {
+          setState(() {
+            _isLoading = false;
+            _errorMessage = 'HTTP ${res.statusCode}';
+          });
+        }
+        return;
+      }
+
+      final tempDir = await getTemporaryDirectory();
+      final file = File(
+        '${tempDir.path}/pdf_${DateTime.now().millisecondsSinceEpoch}.pdf',
+      );
+      await file.writeAsBytes(res.bodyBytes, flush: true);
+
+      if (!mounted) return;
+      setState(() {
+        _localPdfFile = file;
+        // isLoading remains true until SfPdfViewer's onDocumentLoaded fires
+      });
+    } catch (e) {
+      if (kDebugMode) print('PDF download failed: $e');
+      if (mounted) {
+        setState(() {
+          _isLoading = false;
+          _errorMessage = e.toString();
+        });
+      }
     }
   }
 
@@ -132,20 +183,15 @@ class _PdfViewerPageState extends State<PdfViewerPage> {
       ),
       body: Stack(
         children: [
-          SfPdfViewer.network(
+          if (_localPdfFile != null)
-            _fullPdfUrl,
+            SfPdfViewer.file(
+              _localPdfFile!,
               controller: _pdfViewerController,
               enableDoubleTapZooming: true,
               enableTextSelection: true,
               canShowScrollHead: true,
               canShowScrollStatus: true,
               pageLayoutMode: PdfPageLayoutMode.continuous,
-            // فقط برای دامنه‌ی خودی توکن می‌فرستیم؛ presigned S3 با هدر
-            // Authorization پاسخ 403 می‌دهد.
-            headers: _fullPdfUrl.contains('didvan.com') ||
-                    _fullPdfUrl.contains('didvan.app')
-                ? {'Authorization': 'Bearer ${RequestService.token}'}
-                : const <String, String>{},
               onDocumentLoaded: (PdfDocumentLoadedDetails details) {
                 setState(() {
                   _isLoading = false;