Add td_api::getChatFolderChatCount.

td/generate/scheme/td_api.tl

@@ -6840,6 +6840,9 @@ deleteChatFolder chat_folder_id:int32 leave_chat_ids:vector<int53> = Ok;
 //@description Returns identifiers of pinned or always included chats from a chat folder, which are suggested to be left when the chat folder is deleted @chat_folder_id Chat folder identifier
 getChatFolderChatsToLeave chat_folder_id:int32 = Chats;
 
+//@description Returns approximate number of chats in a being created chat folder. Main and archive chat lists must be fully preloaded for this function to work correctly @folder The new chat folder
+getChatFolderChatCount folder:chatFolder = Count;
+
 //@description Changes the order of chat folders @chat_folder_ids Identifiers of chat folders in the new correct order @main_chat_list_position Position of the main chat list among chat folders, 0-based. Can be non-zero only for Premium users
 reorderChatFolders chat_folder_ids:vector<int32> main_chat_list_position:int32 = Ok;
 

td/telegram/DialogFilterManager.cpp

@@ -1469,7 +1469,6 @@ td_api::object_ptr<td_api::updateChatFolders> DialogFilterManager::get_update_ch
 
 void DialogFilterManager::create_dialog_filter(td_api::object_ptr<td_api::chatFolder> filter,
                                                Promise<td_api::object_ptr<td_api::chatFolderInfo>> &&promise) {
-  CHECK(!td_->auth_manager_->is_bot());
   auto max_dialog_filters = clamp(td_->option_manager_->get_option_integer("chat_folder_count_max"),
                                   static_cast<int64>(0), static_cast<int64>(100));
   if (dialog_filters_.size() >= narrow_cast<size_t>(max_dialog_filters)) {

td/telegram/MessagesManager.cpp

@@ -32993,6 +32993,28 @@ void MessagesManager::clear_active_dialog_actions(DialogId dialog_id) {
   }
 }
 
+void MessagesManager::get_dialog_filter_dialog_count(td_api::object_ptr<td_api::chatFolder> filter,
+                                                     Promise<int32> &&promise) {
+  TRY_RESULT_PROMISE(promise, dialog_filter,
+                     DialogFilter::create_dialog_filter(td_, DialogFilterId(), std::move(filter)));
+
+  int32 total_count = 0;
+  for (auto folder_id : dialog_filter->get_folder_ids()) {
+    const auto &folder = *get_dialog_folder(folder_id);
+    for (const auto &dialog_date : folder.ordered_dialogs_) {
+      if (dialog_date.get_order() == DEFAULT_ORDER) {
+        break;
+      }
+
+      auto dialog_id = dialog_date.get_dialog_id();
+      if (dialog_filter->need_dialog(td_, get_dialog_info_for_dialog_filter(get_dialog(dialog_id)))) {
+        total_count++;
+      }
+    }
+  }
+  promise.set_value(std::move(total_count));
+}
+
 void MessagesManager::add_dialog_list_for_dialog_filter(DialogFilterId dialog_filter_id) {
   DialogListId dialog_list_id(dialog_filter_id);
   CHECK(dialog_lists_.count(dialog_list_id) == 0);

td/telegram/MessagesManager.h

@@ -538,6 +538,8 @@ class MessagesManager final : public Actor {
 
   void after_set_typing_query(DialogId dialog_id, int32 generation);
 
+  void get_dialog_filter_dialog_count(td_api::object_ptr<td_api::chatFolder> filter, Promise<int32> &&promise);
+
   void add_dialog_list_for_dialog_filter(DialogFilterId dialog_filter_id);
 
   void edit_dialog_list_for_dialog_filter(unique_ptr<DialogFilter> &old_dialog_filter,

td/telegram/Td.cpp

@@ -6135,6 +6135,19 @@ void Td::on_request(uint64 id, const td_api::getChatFolderChatsToLeave &request)
                                                               std::move(promise));
 }
 
+void Td::on_request(uint64 id, td_api::getChatFolderChatCount &request) {
+  CHECK_IS_USER();
+  CREATE_REQUEST_PROMISE();
+  auto query_promise = PromiseCreator::lambda([promise = std::move(promise)](Result<int32> result) mutable {
+    if (result.is_error()) {
+      promise.set_error(result.move_as_error());
+    } else {
+      promise.set_value(make_tl_object<td_api::count>(result.move_as_ok()));
+    }
+  });
+  messages_manager_->get_dialog_filter_dialog_count(std::move(request.folder_), std::move(query_promise));
+}
+
 void Td::on_request(uint64 id, const td_api::reorderChatFolders &request) {
   CHECK_IS_USER();
   CREATE_OK_REQUEST_PROMISE();

td/telegram/Td.h

@@ -926,6 +926,8 @@ class Td final : public Actor {
 
   void on_request(uint64 id, const td_api::getChatFolderChatsToLeave &request);
 
+  void on_request(uint64 id, td_api::getChatFolderChatCount &request);
+
   void on_request(uint64 id, const td_api::reorderChatFolders &request);
 
   void on_request(uint64 id, const td_api::getChatsForChatFolderInviteLink &request);

td/telegram/cli.cpp

@@ -4669,6 +4669,8 @@ class CliClient final : public Actor {
       ChatFolderId chat_folder_id;
       get_args(args, chat_folder_id);
       send_request(td_api::make_object<td_api::getChatFolderChatsToLeave>(chat_folder_id));
+    } else if (op == "gcfcc") {
+      send_request(td_api::make_object<td_api::getChatFolderChatCount>(as_chat_folder(args)));
     } else if (op == "rcf") {
       int32 main_chat_list_position;
       string chat_folder_ids;