feat(llc): add support for partialUserUpdate endpoint.

Signed-off-by: xsahil03x <[email protected]>

packages/stream_chat/lib/src/client/client.dart

@@ -1073,6 +1073,28 @@ class StreamChatClient {
   Future<UpdateUsersResponse> updateUsers(List<User> users) =>
       _chatApi.user.updateUsers(users);
 
+  /// Partially update the given user with [id].
+  /// Use [set] to define values to be set.
+  /// Use [unset] to define values to be unset.
+  Future<UpdateUsersResponse> partialUpdateUser(
+    String id, {
+    Map<String, Object?>? set,
+    List<String>? unset,
+  }) {
+    final user = PartialUpdateUserRequest(
+      id: id,
+      set: set,
+      unset: unset,
+    );
+    return partialUpdateUsers([user]);
+  }
+
+  /// Batch partial updates the [users].
+  Future<UpdateUsersResponse> partialUpdateUsers(
+    List<PartialUpdateUserRequest> users,
+  ) =>
+      _chatApi.user.partialUpdateUsers(users);
+
   /// Bans a user from all channels
   Future<EmptyResponse> banUser(
     String targetUserId, [

packages/stream_chat/lib/src/core/api/requests.dart

@@ -156,3 +156,29 @@ class PaginationParams extends Equatable {
         lessThanOrEqual,
       ];
 }
+
+/// Request model for the [client.partialUpdateUser] api call.
+@JsonSerializable(createFactory: false)
+class PartialUpdateUserRequest extends Equatable {
+  /// Creates a new PartialUpdateUserRequest instance.
+  const PartialUpdateUserRequest({
+    required this.id,
+    this.set,
+    this.unset,
+  });
+
+  /// User ID.
+  final String id;
+
+  /// Fields to set.
+  final Map<String, Object?>? set;
+
+  /// Fields to unset.
+  final List<String>? unset;
+
+  /// Serialize model to json
+  Map<String, dynamic> toJson() => _$PartialUpdateUserRequestToJson(this);
+
+  @override
+  List<Object?> get props => [id, set, unset];
+}

packages/stream_chat/lib/src/core/api/requests.g.dart

@@ -54,3 +54,14 @@ Map<String, dynamic> _$PaginationParamsToJson(PaginationParams instance) {
   writeNotNull('id_lte', instance.lessThanOrEqual);
   return val;
 }
+
+Map<String, dynamic> _$PartialUpdateUserRequestToJson(
+        PartialUpdateUserRequest instance) =>
+    <String, dynamic>{
+      'stringify': instance.stringify,
+      'hash_code': instance.hashCode,
+      'id': instance.id,
+      'set': instance.set,
+      'unset': instance.unset,
+      'props': instance.props,
+    };

packages/stream_chat/lib/src/core/api/user_api.dart

@@ -46,4 +46,17 @@ class UserApi {
     );
     return UpdateUsersResponse.fromJson(response.data);
   }
+
+  /// Batch partial update of [users].
+  Future<UpdateUsersResponse> partialUpdateUsers(
+    List<PartialUpdateUserRequest> users,
+  ) async {
+    final response = await _client.patch(
+      '/users',
+      data: {
+        'users': users,
+      },
+    );
+    return UpdateUsersResponse.fromJson(response.data);
+  }
 }

packages/stream_chat/lib/src/core/models/channel_state.g.dart

@@ -21,7 +21,7 @@ ChannelState _$ChannelStateFromJson(Map<String, dynamic> json) => ChannelState(
       pinnedMessages: (json['pinned_messages'] as List<dynamic>?)
               ?.map((e) => Message.fromJson(e as Map<String, dynamic>))
               .toList() ??
-          const [],
+          _emptyPinnedMessages,
       watcherCount: json['watcher_count'] as int?,
       watchers: (json['watchers'] as List<dynamic>?)
               ?.map((e) => User.fromJson(e as Map<String, dynamic>))

packages/stream_chat/test/src/client/client_test.dart

@@ -1772,6 +1772,46 @@ void main() {
       verifyNoMoreInteractions(api.user);
     });
 
+    test('`.partialUpdateUser`', () async {
+      const userId = 'test-user-id';
+
+      final set = {'color': 'yellow'};
+      final unset = <String>[];
+
+      final partialUpdateRequest = PartialUpdateUserRequest(
+        id: userId,
+        set: set,
+        unset: unset,
+      );
+
+      final updatedUser = User(
+        id: userId,
+        extraData: {'color': set['color']},
+      );
+
+      when(() => api.user.partialUpdateUsers([partialUpdateRequest]))
+          .thenAnswer(
+        (_) async => UpdateUsersResponse()
+          ..users = {
+            updatedUser.id: updatedUser,
+          },
+      );
+
+      final res = await client.partialUpdateUser(
+        userId,
+        set: set,
+        unset: unset,
+      );
+
+      expect(res, isNotNull);
+      expect(res.users, {updatedUser.id: updatedUser});
+
+      verify(
+        () => api.user.partialUpdateUsers([partialUpdateRequest]),
+      ).called(1);
+      verifyNoMoreInteractions(api.user);
+    });
+
     test('`.banUser`', () async {
       const userId = 'test-user-id';