refactor (core <-> ui <-> persistence) with the new filter changes.

Signed-off-by: Sahil Kumar <[email protected]>

packages/stream_chat_flutter_core/lib/src/channel_list_core.dart

@@ -92,7 +92,7 @@ class ChannelListCore extends StatefulWidget {
   /// The query filters to use.
   /// You can query on any of the custom fields you've defined on the [Channel].
   /// You can also filter other built-in channel fields.
-  final Map<String, dynamic>? filter;
+  final Filter? filter;
 
   /// Query channels options.
   ///

packages/stream_chat_flutter_core/lib/src/channels_bloc.dart

@@ -88,7 +88,7 @@ class ChannelsBlocState extends State<ChannelsBloc>
 
   /// Calls [client.queryChannels] updating [queryChannelsLoading] stream
   Future<void> queryChannels({
-    Map<String, dynamic>? filter,
+    Filter? filter,
     List<SortOption<ChannelModel>>? sortOptions,
     PaginationParams paginationParams = const PaginationParams(limit: 30),
     Map<String, dynamic>? options,
@@ -160,9 +160,8 @@ class ChannelsBlocState extends State<ChannelsBloc>
             newChannels.insert(0, _hiddenChannels[hiddenIndex]);
             _hiddenChannels.removeAt(hiddenIndex);
           } else {
-            if (client.state.channels != null &&
-                client.state.channels?[e.cid] != null) {
-              newChannels.insert(0, client.state.channels![e.cid]!);
+            if (client.state.channels[e.cid] != null) {
+              newChannels.insert(0, client.state.channels[e.cid]!);
             }
           }
         }

packages/stream_chat_flutter_core/lib/src/message_search_bloc.dart

@@ -9,7 +9,7 @@ import 'package:stream_chat_flutter_core/src/stream_chat_core.dart';
 /// [MessageSearchBloc] can be access at anytime by using the static [of] method
 /// using Flutter's [BuildContext].
 ///
-// API docs: https://getstream.io/chat/docs/flutter-dart/send_message/
+/// API docs: https://getstream.io/chat/docs/flutter-dart/send_message/
 class MessageSearchBloc extends StatefulWidget {
   /// Instantiate a new MessageSearchBloc
   const MessageSearchBloc({
@@ -58,7 +58,7 @@ class MessageSearchBlocState extends State<MessageSearchBloc>
   /// Calls [StreamChatClient.search] updating
   /// [messagesStream] and [queryMessagesLoading] stream
   Future<void> search({
-    required Map<String, dynamic> filter,
+    required Filter filter,
     Map<String, dynamic>? messageFilter,
     List<SortOption>? sort,
     String? query,

packages/stream_chat_flutter_core/lib/src/message_search_list_core.dart

@@ -67,7 +67,7 @@ class MessageSearchListCore extends StatefulWidget {
   /// The query filters to use.
   /// You can query on any of the custom fields you've defined on the [Channel].
   /// You can also filter other built-in channel fields.
-  final Map<String, dynamic> filters;
+  final Filter filters;
 
   /// The sorting used for the channels matching the filters.
   /// Sorting is based on field and direction, multiple sorting options can be