Apply edited data from service message about forum topics.

td/telegram/ForumTopicEditedData.h

@@ -25,6 +25,8 @@ class ForumTopicEditedData {
 
   friend StringBuilder &operator<<(StringBuilder &string_builder, const ForumTopicEditedData &topic_edited_data);
 
+  friend class ForumTopicInfo;
+
  public:
   ForumTopicEditedData() = default;
 

td/telegram/ForumTopicIcon.cpp

@@ -12,6 +12,14 @@ ForumTopicIcon::ForumTopicIcon(int32 color, int64 custom_emoji_id)
     : color_(color & 0xFFFFFF), custom_emoji_id_(custom_emoji_id) {
 }
 
+bool ForumTopicIcon::edit_custom_emoji_id(CustomEmojiId custom_emoji_id) {
+  if (custom_emoji_id_ != custom_emoji_id) {
+    custom_emoji_id_ = custom_emoji_id;
+    return true;
+  }
+  return false;
+}
+
 td_api::object_ptr<td_api::forumTopicIcon> ForumTopicIcon::get_forum_topic_icon_object() const {
   return td_api::make_object<td_api::forumTopicIcon>(color_, custom_emoji_id_.get());
 }

td/telegram/ForumTopicIcon.h

@@ -26,6 +26,8 @@ class ForumTopicIcon {
   ForumTopicIcon() = default;
   ForumTopicIcon(int32 color, int64 custom_emoji_id);
 
+  bool edit_custom_emoji_id(CustomEmojiId custom_emoji_id);
+
   td_api::object_ptr<td_api::forumTopicIcon> get_forum_topic_icon_object() const;
 
   template <class StorerT>

td/telegram/ForumTopicInfo.cpp

@@ -35,6 +35,22 @@ ForumTopicInfo::ForumTopicInfo(const tl_object_ptr<telegram_api::ForumTopic> &fo
   }
 }
 
+bool ForumTopicInfo::apply_edited_data(const ForumTopicEditedData &edited_data) {
+  bool is_changed = false;
+  if (!edited_data.title_.empty() && edited_data.title_ != title_) {
+    title_ = edited_data.title_;
+    is_changed = true;
+  }
+  if (edited_data.edit_icon_custom_emoji_id_ && icon_.edit_custom_emoji_id(edited_data.icon_custom_emoji_id_)) {
+    is_changed = true;
+  }
+  if (edited_data.edit_is_closed_ && edited_data.is_closed_ != is_closed_) {
+    is_closed_ = edited_data.is_closed_;
+    is_changed = true;
+  }
+  return is_changed;
+}
+
 td_api::object_ptr<td_api::forumTopicInfo> ForumTopicInfo::get_forum_topic_info_object(Td *td) const {
   if (is_empty()) {
     return nullptr;

td/telegram/ForumTopicInfo.h

@@ -7,6 +7,7 @@
 #pragma once
 
 #include "td/telegram/DialogId.h"
+#include "td/telegram/ForumTopicEditedData.h"
 #include "td/telegram/ForumTopicIcon.h"
 #include "td/telegram/MessageId.h"
 #include "td/telegram/td_api.h"
@@ -54,6 +55,8 @@ class ForumTopicInfo {
     return top_thread_message_id_;
   }
 
+  bool apply_edited_data(const ForumTopicEditedData &edited_data);
+
   td_api::object_ptr<td_api::forumTopicInfo> get_forum_topic_info_object(Td *td) const;
 };
 

td/telegram/ForumTopicManager.cpp

@@ -264,6 +264,15 @@ void ForumTopicManager::toggle_forum_topic_is_closed(DialogId dialog_id, Message
   td_->create_handler<EditForumTopicQuery>(std::move(promise))->send(channel_id, top_thread_message_id, is_closed);
 }
 
+void ForumTopicManager::on_forum_topic_edited(DialogId dialog_id, MessageId top_thread_message_id,
+                                              const ForumTopicEditedData &edited_data) {
+  auto topic_info = get_topic_info(dialog_id, top_thread_message_id);
+  if (topic_info == nullptr) {
+    return;
+  }
+  topic_info->apply_edited_data(edited_data);
+}
+
 Status ForumTopicManager::is_forum(DialogId dialog_id) {
   if (!td_->messages_manager_->have_dialog_force(dialog_id, "ForumTopicManager::is_forum")) {
     return Status::Error(400, "Chat not found");

td/telegram/ForumTopicManager.h

@@ -8,6 +8,7 @@
 
 #include "td/telegram/CustomEmojiId.h"
 #include "td/telegram/DialogId.h"
+#include "td/telegram/ForumTopicEditedData.h"
 #include "td/telegram/ForumTopicInfo.h"
 #include "td/telegram/td_api.h"
 
@@ -42,6 +43,9 @@ class ForumTopicManager final : public Actor {
   void toggle_forum_topic_is_closed(DialogId dialog_id, MessageId top_thread_message_id, bool is_closed,
                                     Promise<Unit> &&promise);
 
+  void on_forum_topic_edited(DialogId dialog_id, MessageId top_thread_message_id,
+                             const ForumTopicEditedData &edited_data);
+
  private:
   static constexpr size_t MAX_FORUM_TOPIC_TITLE_LENGTH = 128;  // server side limit for forum topic title
 

td/telegram/MessageContent.cpp

@@ -33,6 +33,7 @@
 #include "td/telegram/ForumTopicEditedData.hpp"
 #include "td/telegram/ForumTopicIcon.h"
 #include "td/telegram/ForumTopicIcon.hpp"
+#include "td/telegram/ForumTopicManager.h"
 #include "td/telegram/Game.h"
 #include "td/telegram/Game.hpp"
 #include "td/telegram/Global.h"
@@ -6102,6 +6103,21 @@ void add_message_content_dependencies(Dependencies &dependencies, const MessageC
   add_formatted_text_dependencies(dependencies, get_message_content_text(message_content));
 }
 
+void update_forum_topic_info_by_service_message_content(Td *td, const MessageContent *content, DialogId dialog_id,
+                                                        MessageId top_thread_message_id) {
+  if (!top_thread_message_id.is_valid()) {
+    return;
+  }
+  switch (content->get_type()) {
+    case MessageContentType::TopicEdit:
+      return td->forum_topic_manager_->on_forum_topic_edited(
+          dialog_id, top_thread_message_id, static_cast<const MessageTopicEdit *>(content)->edited_data);
+    default:
+      // nothing to do
+      return;
+  }
+}
+
 void on_sent_message_content(Td *td, const MessageContent *content) {
   switch (content->get_type()) {
     case MessageContentType::Animation:

td/telegram/MessageContent.h

@@ -252,6 +252,9 @@ void update_failed_to_send_message_content(Td *td, unique_ptr<MessageContent> &c
 
 void add_message_content_dependencies(Dependencies &dependencies, const MessageContent *message_content);
 
+void update_forum_topic_info_by_service_message_content(Td *td, const MessageContent *content, DialogId dialog_id,
+                                                        MessageId top_thread_message_id);
+
 void on_sent_message_content(Td *td, const MessageContent *content);
 
 void move_message_content_sticker_set_to_top(Td *td, const MessageContent *content);

td/telegram/MessagesManager.cpp

@@ -35644,6 +35644,7 @@ MessagesManager::Message *MessagesManager::add_message_to_dialog(Dialog *d, uniq
   if (from_update) {
     speculatively_update_active_group_call_id(d, m);
     speculatively_update_channel_participants(dialog_id, m);
+    update_forum_topic_info_by_service_message_content(td_, m->content.get(), dialog_id, m->top_thread_message_id);
     update_sent_message_contents(dialog_id, m);
     update_used_hashtags(dialog_id, m);
     update_top_dialogs(dialog_id, m);