fix receipts are getting deleted if message was removed

lib/src/database/daos/messages.dao.dart

@@ -64,18 +64,39 @@ class MessagesDao extends DatabaseAccessor<TwonlyDB> with _$MessagesDaoMixin {
     return query.map((row) => row.readTable(messages)).watch();
   }
 
-  Stream<Message?> watchLastMessage(String groupId) {
+  Future<Stream<Message?>> watchLastMessage(String groupId) async {
+    final group = await twonlyDB.groupsDao.getGroup(groupId);
+    final deletionTime = clock.now().subtract(
+      Duration(
+        milliseconds: group!.deleteMessagesAfterMilliseconds,
+      ),
+    );
     return (select(messages)
-          ..where((t) => t.groupId.equals(groupId))
+          ..where(
+            (t) =>
+                t.groupId.equals(groupId) &
+                // messages in groups will only be removed in case all members have received it...
+                // so ensuring that this message is not shown in the messages anymore
+                t.openedAt.isBiggerThanValue(deletionTime),
+          )
           ..orderBy([(t) => OrderingTerm.desc(t.createdAt)])
           ..limit(1))
         .watchSingleOrNull();
   }
 
-  Stream<List<Message>> watchByGroupId(String groupId) {
+  Future<Stream<List<Message>>> watchByGroupId(String groupId) async {
+    final group = await twonlyDB.groupsDao.getGroup(groupId);
+    final deletionTime = clock.now().subtract(
+      Duration(
+        milliseconds: group!.deleteMessagesAfterMilliseconds,
+      ),
+    );
     return ((select(messages)..where(
             (t) =>
                 t.groupId.equals(groupId) &
+                // messages in groups will only be removed in case all members have received it...
+                // so ensuring that this message is not shown in the messages anymore
+                t.openedAt.isBiggerThanValue(deletionTime) &
                 (t.isDeletedFromSender.equals(true) |
                     (t.type.equals(MessageType.text.name).not() |
                         t.type.equals(MessageType.media.name).not()) |
@@ -127,7 +148,8 @@ class MessagesDao extends DatabaseAccessor<TwonlyDB> with _$MessagesDaoMixin {
                 (m.mediaStored.equals(true) &
                         m.isDeletedFromSender.equals(true) |
                     m.mediaStored.equals(false)) &
-                (m.openedAt.isSmallerThanValue(deletionTime) |
+                // Only remove the message when ALL members have seen it. Otherwise the receipt will also be deleted which could cause issues in case a member opens the image later..
+                (m.openedByAll.isSmallerThanValue(deletionTime) |
                     (m.isDeletedFromSender.equals(true) &
                         m.createdAt.isSmallerThanValue(deletionTime))),
           ))

lib/src/services/api/messages.dart

@@ -102,21 +102,23 @@ Future<(Uint8List, Uint8List?)?> tryToSendCompleteMessage({
       message.encryptedContent,
     );
 
-    final pushNotification = await getPushNotificationFromEncryptedContent(
-      receipt.contactId,
-      receipt.messageId,
-      encryptedContent,
-    );
-
-    Log.info('Uploading $receiptId. (${pushNotification?.kind})');
+    Log.info('Uploading $receiptId.');
 
     Uint8List? pushData;
-    if (pushNotification != null && receipt.retryCount <= 1) {
-      // Only show the push notification the first two time.
-      pushData = await encryptPushNotification(
+    if (receipt.retryCount == 0) {
+      final pushNotification = await getPushNotificationFromEncryptedContent(
         receipt.contactId,
-        pushNotification,
+        receipt.messageId,
+        encryptedContent,
       );
+
+      if (pushNotification != null) {
+        // Only show the push notification the first two time.
+        pushData = await encryptPushNotification(
+          receipt.contactId,
+          pushNotification,
+        );
+      }
     }
 
     if (message.type == pb.Message_Type.TEST_NOTIFICATION) {

lib/src/views/chats/chat_list_components/group_list_item.dart

@@ -63,9 +63,10 @@ class _UserListItem extends State<GroupListItem> {
   }
 
   Future<void> initStreams() async {
-    _lastMessageStream = twonlyDB.messagesDao
-        .watchLastMessage(widget.group.groupId)
-        .listen((update) {
+    _lastMessageStream =
+        (await twonlyDB.messagesDao.watchLastMessage(
+          widget.group.groupId,
+        )).listen((update) {
           protectUpdateState.protect(() async {
             await updateState(update, _messagesNotOpened);
           });

lib/src/views/chats/chat_messages.view.dart

@@ -107,7 +107,7 @@ class _ChatMessagesViewState extends State<ChatMessagesView> {
       });
     });
 
-    final msgStream = twonlyDB.messagesDao.watchByGroupId(widget.groupId);
+    final msgStream = await twonlyDB.messagesDao.watchByGroupId(widget.groupId);
     messageSub = msgStream.listen((update) async {
       allMessages = update;
       await protectMessageUpdating.protect(() async {