implement shadowban

lib/src/channel_preview.dart

@@ -128,7 +128,7 @@ class ChannelPreview extends StatelessWidget {
       stream: channel.state.messagesStream,
       initialData: channel.state.messages,
       builder: (context, snapshot) {
-        final lastMessage = channel.state.lastMessage;
+        final lastMessage = snapshot.data.lastWhere((m) => m.shadowed != true);
         if (lastMessage == null) {
           return SizedBox();
         }

lib/src/message_list_view.dart

@@ -522,7 +522,8 @@ class _MessageListViewState extends State<MessageListView> {
         .map((messages) =>
             messages
                 ?.where((m) =>
-                    !(m.status == MessageSendingStatus.FAILED && m.isDeleted))
+                    !(m.status == MessageSendingStatus.FAILED && m.isDeleted) &&
+                    m.shadowed != true)
                 ?.toList() ??
             [])
         .listen((newMessages) {

lib/src/stream_chat.dart

@@ -184,6 +184,7 @@ class StreamChatState extends State<StreamChat> with WidgetsBindingObserver {
               .on(EventType.messageNew)
               .where((e) => e.user?.id != user.id)
               .where((e) => e.message.silent != true)
+              .where((e) => e.message.shadowed != true)
               .listen((event) async {
             final channel = client.channel(
               event.channelType,