5 files changed, 60 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index aacf2a33b..c6064508e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -817,6 +817,7 @@ set(TDLIB_SOURCE_PART2
   td/telegram/ForumTopic.h
   td/telegram/ForumTopicEditedData.h
   td/telegram/ForumTopicIcon.h
+  td/telegram/ForumTopicId.h
   td/telegram/ForumTopicInfo.h
   td/telegram/ForumTopicManager.h
   td/telegram/Game.h
diff --git a/SplitSource.php b/SplitSource.php
index d3a721a02..17773a68e 100644
--- a/SplitSource.php
+++ b/SplitSource.php
@@ -352,6 +352,7 @@ function split_file($file, $chunks, $undo) {
             'file_reference_manager[_(-](?![.]get[(][)])|FileReferenceManager|file_references[)]' => 'FileReferenceManager',
             'file_manager[_(-](?![.]get[(][)])|FileManager([^ ;.]| [^*])|update_file[)]' => 'files/FileManager',
             'FolderId' => 'FolderId',
+            'ForumTopicId' => 'ForumTopicId',
             'forum_topic_manager[_(-](?![.]get[(][)])|ForumTopicManager' => 'ForumTopicManager',
             'game_manager[_(-](?![.]get[(][)])|GameManager' => 'GameManager',
             'G[(][)]|Global[^A-Za-z]' => 'Global',
diff --git a/td/telegram/ForumTopicId.h b/td/telegram/ForumTopicId.h
new file mode 100644
index 000000000..3139abc7d
--- /dev/null
+++ b/td/telegram/ForumTopicId.h
@@ -0,0 +1,55 @@
+//
+// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2025
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+#pragma once
+
+#include "td/utils/common.h"
+#include "td/utils/HashTableUtils.h"
+#include "td/utils/StringBuilder.h"
+
+#include <type_traits>
+
+namespace td {
+
+class ForumTopicId {
+  int32 id_ = 0;
+
+ public:
+  ForumTopicId() = default;
+
+  explicit constexpr ForumTopicId(int32 forum_topic_id) : id_(forum_topic_id) {
+  }
+  template <class T, typename = std::enable_if_t<std::is_convertible<T, int32>::value>>
+  ForumTopicId(T forum_topic_id) = delete;
+
+  bool is_valid() const {
+    return id_ > 0;
+  }
+
+  int32 get() const {
+    return id_;
+  }
+
+  bool operator==(const ForumTopicId &other) const {
+    return id_ == other.id_;
+  }
+
+  bool operator!=(const ForumTopicId &other) const {
+    return id_ != other.id_;
+  }
+};
+
+struct ForumTopicIdHash {
+  uint32 operator()(ForumTopicId forum_topic_id) const {
+    return Hash<int32>()(forum_topic_id.get());
+  }
+};
+
+inline StringBuilder &operator<<(StringBuilder &string_builder, ForumTopicId forum_topic_id) {
+  return string_builder << "forum topic " << forum_topic_id.get();
+}
+
+}  // namespace td
diff --git a/td/telegram/MessageId.h b/td/telegram/MessageId.h
index 48ee952a9..7cc83e14c 100644
--- a/td/telegram/MessageId.h
+++ b/td/telegram/MessageId.h
@@ -206,4 +206,6 @@ struct MessageIdHash {
   }
 };
 
+StringBuilder &operator<<(StringBuilder &string_builder, MessageId message_id);
+
 }  // namespace td
diff --git a/td/telegram/MessageTopic.h b/td/telegram/MessageTopic.h
index f365b065b..b8bcf8e6e 100644
--- a/td/telegram/MessageTopic.h
+++ b/td/telegram/MessageTopic.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "td/telegram/DialogId.h"
+#include "td/telegram/ForumTopicId.h"
 #include "td/telegram/MessageId.h"
 #include "td/telegram/SavedMessagesTopicId.h"
 #include "td/telegram/td_api.h"