add type safe filters in queryUsers and queryMembers

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

packages/stream_chat/lib/src/api/channel.dart

@@ -1089,7 +1089,7 @@ class Channel {
 
   /// Query channel members
   Future<QueryMembersResponse> queryMembers({
-    Map<String, dynamic>? filter,
+    Filter? filter,
     List<SortOption>? sort,
     PaginationParams? pagination,
   }) async {

packages/stream_chat/lib/src/client.dart

@@ -1020,7 +1020,7 @@ class StreamChatClient {
 
   /// Requests users with a given query.
   Future<QueryUsersResponse> queryUsers({
-    Map<String, dynamic>? filter,
+    Filter? filter,
     List<SortOption>? sort,
     Map<String, dynamic>? options,
     PaginationParams? pagination,
@@ -1030,7 +1030,7 @@ class StreamChatClient {
     };
 
     final payload = <String, dynamic>{
-      'filter_conditions': filter ?? {},
+      'filter_conditions': filter,
       'sort': sort,
     }..addAll(defaultOptions);
 

packages/stream_chat/test/src/client_test.dart

@@ -363,7 +363,7 @@ void main() {
         final client = StreamChatClient('api-key', httpClient: mockDio);
         final queryParams = {
           'payload': json.encode({
-            'filter_conditions': {},
+            'filter_conditions': null,
             'sort': null,
             'presence': false,
           }),
@@ -396,11 +396,7 @@ void main() {
         when(() => mockDio.interceptors).thenReturn(Interceptors());
 
         final client = StreamChatClient('api-key', httpClient: mockDio);
-        final queryFilter = <String, dynamic>{
-          'id': {
-            '\$in': ['test'],
-          },
-        };
+        final queryFilter = Filter.in_('id', const ['test']);
         const sortOptions = <SortOption>[];
         final options = {'presence': true};
         final queryParams = <String, dynamic>{