fix(neon_framework): Handle delete-multiple background push notifications

.cspell/nextcloud.txt

@@ -39,6 +39,7 @@ mountpoint
 navigations
 nextcloud
 nextcloud's
+nids
 organisation
 partlycloudy
 pollinterval

packages/neon_framework/lib/src/utils/push_utils.dart

@@ -113,7 +113,12 @@ class PushUtils {
     final pushNotifications = await parseEncryptedPushNotifications(storage, encryptedPushNotifications, accountID);
     for (final pushNotification in pushNotifications) {
       if (pushNotification.subject.delete ?? false) {
-        await localNotificationsPlugin.cancel(_getNotificationID(accountID, pushNotification));
+        await localNotificationsPlugin.cancel(_getNotificationID(accountID, pushNotification.subject.nid!));
+      } else if (pushNotification.subject.deleteMultiple ?? false) {
+        await Future.wait([
+          for (final nid in pushNotification.subject.nids!)
+            localNotificationsPlugin.cancel(_getNotificationID(accountID, nid)),
+        ]);
       } else if (pushNotification.subject.deleteAll ?? false) {
         await localNotificationsPlugin.cancelAll();
       } else if (pushNotification.type == 'background') {
@@ -164,7 +169,7 @@ class PushUtils {
           final when = notification != null ? tz.TZDateTime.parse(tz.UTC, notification.datetime) : null;
 
           await localNotificationsPlugin.show(
-            _getNotificationID(accountID, pushNotification),
+            _getNotificationID(accountID, pushNotification.subject.nid!),
             message != null && appName != null ? '$appName: $title' : title,
             message,
             NotificationDetails(
@@ -289,8 +294,8 @@ class PushUtils {
     return ByteArrayAndroidBitmap(img.encodeBmp(img.decodePng(bytes!.buffer.asUint8List())!));
   }
 
-  static int _getNotificationID(String accountID, PushNotification notification) {
-    return sha256.convert(utf8.encode('$accountID${notification.subject.nid}')).bytes.reduce((a, b) => a + b);
+  static int _getNotificationID(String accountID, int nid) {
+    return sha256.convert(utf8.encode('$accountID$nid')).bytes.reduce((a, b) => a + b);
   }
 
   static int _getGroupSummaryID(String accountID, String app) {

packages/neon_framework/test/push_utils_test.dart

@@ -207,6 +207,22 @@ void main() {
       verify(() => localNotificationsPlatform.cancel(3811)).called(1);
     });
 
+    test('Delete multiple', () async {
+      final payload = {
+        'priority': '',
+        'type': '',
+        'subject': {
+          'nids': [1, 2],
+          'delete-multiple': true,
+        },
+      };
+
+      await PushUtils.onMessage(_encryptPushNotifications(keypair, [payload]), account.id);
+
+      verify(() => localNotificationsPlatform.cancel(3811)).called(1);
+      verify(() => localNotificationsPlatform.cancel(4269)).called(1);
+    });
+
     test('Delete all', () async {
       final payload = {
         'priority': '',

packages/nextcloud/lib/src/api/notifications/notifications_helpers.dart

@@ -2,6 +2,7 @@
 
 import 'dart:convert';
 
+import 'package:built_collection/built_collection.dart';
 import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
 import 'package:built_value/standard_json_plugin.dart';
@@ -35,9 +36,12 @@ abstract class DecryptedSubject implements Built<DecryptedSubject, DecryptedSubj
   // ignore: public_member_api_docs
   static Serializer<DecryptedSubject> get serializer => _$decryptedSubjectSerializer;
 
-  /// ID if the notification.
+  /// ID of the notification.
   int? get nid;
 
+  /// IDs of multiple notifications.
+  BuiltList<int>? get nids;
+
   /// App that sent the notification.
   String? get app;
 
@@ -53,12 +57,17 @@ abstract class DecryptedSubject implements Built<DecryptedSubject, DecryptedSubj
   /// Delete the notification.
   bool? get delete;
 
+  /// Delete multiple notifications.
+  @BuiltValueField(wireName: 'delete-multiple')
+  bool? get deleteMultiple;
+
   /// Delete all notifications.
   @BuiltValueField(wireName: 'delete-all')
   bool? get deleteAll;
 }
 
 final Serializers _serializers = (Serializers().toBuilder()
       ..add(DecryptedSubject.serializer)
+      ..addBuilderFactory(const FullType(BuiltList, [FullType(int)]), ListBuilder<int>.new)
       ..addPlugin(StandardJsonPlugin()))
     .build();