diff --git a/CMakeLists.txt b/CMakeLists.txt
index 45a935301..6be026faa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -617,6 +617,7 @@ set(TDLIB_SOURCE
   td/telegram/AnimationsManager.hpp
   td/telegram/AudiosManager.hpp
   td/telegram/AuthManager.hpp
+  td/telegram/Document.hpp
   td/telegram/DocumentsManager.hpp
   td/telegram/DraftMessage.hpp
   td/telegram/FileReferenceManager.hpp
diff --git a/td/telegram/Document.cpp b/td/telegram/Document.cpp
index e53480f62..92e26e927 100644
--- a/td/telegram/Document.cpp
+++ b/td/telegram/Document.cpp
@@ -31,9 +31,8 @@ StringBuilder &operator<<(StringBuilder &string_builder, const Document &documen
         return "Unreachable";
     }
   }();
-  
+
   return string_builder << '[' << type << ' ' << document.file_id << ']';
 }
 
-
 }  // namespace td
diff --git a/td/telegram/Document.h b/td/telegram/Document.h
index b439b4427..5ca243692 100644
--- a/td/telegram/Document.h
+++ b/td/telegram/Document.h
@@ -21,7 +21,7 @@ struct Document {
   FileId file_id;
 
   Document() = default;
-  Document(Type type, FileId file_id): type(type), file_id(file_id) {
+  Document(Type type, FileId file_id) : type(type), file_id(file_id) {
   }
 };
 
diff --git a/td/telegram/Document.hpp b/td/telegram/Document.hpp
new file mode 100644
index 000000000..a0a5011fa
--- /dev/null
+++ b/td/telegram/Document.hpp
@@ -0,0 +1,98 @@
+//
+// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
+//
+// 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/telegram/Document.h"
+
+#include "td/telegram/AnimationsManager.h"
+#include "td/telegram/AudiosManager.h"
+#include "td/telegram/DocumentsManager.h"
+#include "td/telegram/files/FileId.hpp"
+#include "td/telegram/StickersManager.h"
+#include "td/telegram/Td.h"
+#include "td/telegram/VideosManager.h"
+#include "td/telegram/VideoNotesManager.h"
+#include "td/telegram/VoiceNotesManager.h"
+
+#include "td/utils/logging.h"
+#include "td/utils/tl_helpers.h"
+
+namespace td {
+
+template <class StorerT>
+void store(const Document &document, StorerT &storer) {
+  Td *td = storer.context()->td().get_actor_unsafe();
+  CHECK(td != nullptr);
+
+  store(document.type, storer);
+  switch (document.type) {
+    case Document::Type::Animation:
+      td->animations_manager_->store_animation(document.file_id, storer);
+      break;
+    case Document::Type::Audio:
+      td->audios_manager_->store_audio(document.file_id, storer);
+      break;
+    case Document::Type::General:
+      td->documents_manager_->store_document(document.file_id, storer);
+      break;
+    case Document::Type::Sticker:
+      td->stickers_manager_->store_sticker(document.file_id, false, storer);
+      break;
+    case Document::Type::Video:
+      td->videos_manager_->store_video(document.file_id, storer);
+      break;
+    case Document::Type::VideoNote:
+      td->video_notes_manager_->store_video_note(document.file_id, storer);
+      break;
+    case Document::Type::VoiceNote:
+      td->voice_notes_manager_->store_voice_note(document.file_id, storer);
+      break;
+    case Document::Type::Unknown:
+    default:
+      UNREACHABLE();
+  }
+}
+
+template <class ParserT>
+void parse(Document &document, ParserT &parser) {
+  Td *td = parser.context()->td().get_actor_unsafe();
+  CHECK(td != nullptr);
+
+  parse(document.type, parser);
+  switch (document.type) {
+    case Document::Type::Animation:
+      document.file_id = td->animations_manager_->parse_animation(parser);
+      break;
+    case Document::Type::Audio:
+      document.file_id = td->audios_manager_->parse_audio(parser);
+      break;
+    case Document::Type::General:
+      document.file_id = td->documents_manager_->parse_document(parser);
+      break;
+    case Document::Type::Sticker:
+      document.file_id = td->stickers_manager_->parse_sticker(false, parser);
+      break;
+    case Document::Type::Video:
+      document.file_id = td->videos_manager_->parse_video(parser);
+      break;
+    case Document::Type::VideoNote:
+      document.file_id = td->video_notes_manager_->parse_video_note(parser);
+      break;
+    case Document::Type::VoiceNote:
+      document.file_id = td->voice_notes_manager_->parse_voice_note(parser);
+      break;
+    case Document::Type::Unknown:
+    default:
+      UNREACHABLE();
+  }
+  if (!document.file_id.is_valid()) {
+    LOG(ERROR) << "Parse invalid document.file_id";
+    document = Document();
+  }
+}
+
+}  // namespace td
diff --git a/td/telegram/WebPagesManager.cpp b/td/telegram/WebPagesManager.cpp
index 630e1de12..a3e2e2164 100644
--- a/td/telegram/WebPagesManager.cpp
+++ b/td/telegram/WebPagesManager.cpp
@@ -16,6 +16,7 @@
 #include "td/telegram/ChannelId.h"
 #include "td/telegram/ContactsManager.h"
 #include "td/telegram/Document.h"
+#include "td/telegram/Document.hpp"
 #include "td/telegram/DocumentsManager.h"
 #include "td/telegram/DocumentsManager.hpp"
 #include "td/telegram/FileReferenceManager.h"
@@ -280,36 +281,7 @@ class WebPagesManager::WebPage {
       store(author, storer);
     }
     if (has_document) {
-      Td *td = storer.context()->td().get_actor_unsafe();
-      CHECK(td != nullptr);
-
-      store(document.type, storer);
-      switch (document.type) {
-        case Document::Type::Animation:
-          td->animations_manager_->store_animation(document.file_id, storer);
-          break;
-        case Document::Type::Audio:
-          td->audios_manager_->store_audio(document.file_id, storer);
-          break;
-        case Document::Type::General:
-          td->documents_manager_->store_document(document.file_id, storer);
-          break;
-        case Document::Type::Sticker:
-          td->stickers_manager_->store_sticker(document.file_id, false, storer);
-          break;
-        case Document::Type::Video:
-          td->videos_manager_->store_video(document.file_id, storer);
-          break;
-        case Document::Type::VideoNote:
-          td->video_notes_manager_->store_video_note(document.file_id, storer);
-          break;
-        case Document::Type::VoiceNote:
-          td->voice_notes_manager_->store_voice_note(document.file_id, storer);
-          break;
-        case Document::Type::Unknown:
-        default:
-          UNREACHABLE();
-      }
+      store(document, storer);
     }
   }
 
@@ -382,40 +354,7 @@ class WebPagesManager::WebPage {
       parse(author, parser);
     }
     if (has_document) {
-      Td *td = parser.context()->td().get_actor_unsafe();
-      CHECK(td != nullptr);
-
-      parse(document.type, parser);
-      switch (document.type) {
-        case Document::Type::Animation:
-          document.file_id = td->animations_manager_->parse_animation(parser);
-          break;
-        case Document::Type::Audio:
-          document.file_id = td->audios_manager_->parse_audio(parser);
-          break;
-        case Document::Type::General:
-          document.file_id = td->documents_manager_->parse_document(parser);
-          break;
-        case Document::Type::Sticker:
-          document.file_id = td->stickers_manager_->parse_sticker(false, parser);
-          break;
-        case Document::Type::Video:
-          document.file_id = td->videos_manager_->parse_video(parser);
-          break;
-        case Document::Type::VideoNote:
-          document.file_id = td->video_notes_manager_->parse_video_note(parser);
-          break;
-        case Document::Type::VoiceNote:
-          document.file_id = td->voice_notes_manager_->parse_voice_note(parser);
-          break;
-        case Document::Type::Unknown:
-        default:
-          UNREACHABLE();
-      }
-      if (!document.file_id.is_valid()) {
-        LOG(ERROR) << "Parse invalid document.file_id";
-        document = Document();
-      }
+      parse(document, parser);
     }
 
     if (has_instant_view) {