Add forwardMessages method.

telegram-bot-api/Client.cpp

@@ -232,6 +232,7 @@ bool Client::init_methods() {
   methods_.emplace("stoppoll", &Client::process_stop_poll_query);
   methods_.emplace("copymessage", &Client::process_copy_message_query);
   methods_.emplace("forwardmessage", &Client::process_forward_message_query);
+  methods_.emplace("forwardmessages", &Client::process_forward_messages_query);
   methods_.emplace("sendmediagroup", &Client::process_send_media_group_query);
   methods_.emplace("sendchataction", &Client::process_send_chat_action_query);
   methods_.emplace("editmessagetext", &Client::process_edit_message_text_query);
@@ -3575,6 +3576,44 @@ class Client::TdOnSendMessageAlbumCallback final : public TdQueryCallback {
   PromisedQueryPtr query_;
 };
 
+class Client::TdOnForwardMessagesCallback final : public TdQueryCallback {
+ public:
+  TdOnForwardMessagesCallback(Client *client, int64 chat_id, std::size_t message_count, PromisedQueryPtr query)
+      : client_(client), chat_id_(chat_id), message_count_(message_count), query_(std::move(query)) {
+  }
+
+  void on_result(object_ptr<td_api::Object> result) final {
+    if (result->get_id() == td_api::error::ID) {
+      if (message_count_ > 0) {
+        client_->decrease_yet_unsent_message_count(chat_id_, static_cast<int32>(message_count_));
+      }
+      return fail_query_with_error(std::move(query_), move_object_as<td_api::error>(result));
+    }
+
+    CHECK(result->get_id() == td_api::messages::ID);
+    auto messages = move_object_as<td_api::messages>(result);
+    CHECK(messages->messages_.size() == message_count_);
+    td::remove_if(messages->messages_, [](const auto &message) { return message == nullptr; });
+    if (messages->messages_.size() != message_count_) {
+      client_->decrease_yet_unsent_message_count(chat_id_,
+                                                 static_cast<int32>(message_count_ - messages->messages_.size()));
+    }
+    if (messages->messages_.empty()) {
+      return fail_query_with_error(std::move(query_), 400, "Messages can't be forwarded");
+    }
+    auto query_id = client_->get_send_message_query_id(std::move(query_), true);
+    for (auto &message : messages->messages_) {
+      client_->on_sent_message(std::move(message), query_id);
+    }
+  }
+
+ private:
+  Client *client_;
+  int64 chat_id_;
+  std::size_t message_count_;
+  PromisedQueryPtr query_;
+};
+
 class Client::TdOnDeleteFailedToSendMessageCallback final : public TdQueryCallback {
  public:
   TdOnDeleteFailedToSendMessageCallback(Client *client, int64 chat_id, int64 message_id)
@@ -8513,7 +8552,11 @@ void Client::on_message_send_succeeded(object_ptr<td_api::message> &&message, in
   auto query_id = extract_yet_unsent_message_query_id(chat_id, old_message_id);
   auto &query = *pending_send_message_queries_[query_id];
   if (query.is_multisend) {
-    query.messages.push_back(td::json_encode<td::string>(JsonMessage(message_info, true, "sent message", this)));
+    if (query.query->method() == "forwardmessages") {
+      query.messages.push_back(td::json_encode<td::string>(JsonMessageId(new_message_id)));
+    } else {
+      query.messages.push_back(td::json_encode<td::string>(JsonMessage(message_info, true, "sent message", this)));
+    }
     query.awaited_message_count--;
 
     if (query.awaited_message_count == 0) {
@@ -9076,6 +9119,48 @@ td::Status Client::process_forward_message_query(PromisedQueryPtr &query) {
   return td::Status::OK();
 }
 
+td::Status Client::process_forward_messages_query(PromisedQueryPtr &query) {
+  auto chat_id = query->arg("chat_id");
+  auto message_thread_id = get_message_id(query.get(), "message_thread_id");
+  TRY_RESULT(from_chat_id, get_required_string_arg(query.get(), "from_chat_id"));
+  TRY_RESULT(message_ids, get_message_ids(query.get(), 100));
+  if (message_ids.empty()) {
+    return td::Status::Error(400, "Message identifiers are not specified");
+  }
+  auto disable_notification = to_bool(query->arg("disable_notification"));
+  auto protect_content = to_bool(query->arg("protect_content"));
+
+  auto on_success = [this, from_chat_id = from_chat_id.str(), message_ids = std::move(message_ids),
+                     disable_notification, protect_content](int64 chat_id, int64 message_thread_id,
+                                                            CheckedReplyParameters, PromisedQueryPtr query) mutable {
+    auto it = yet_unsent_message_count_.find(chat_id);
+    if (it != yet_unsent_message_count_.end() && it->second >= MAX_CONCURRENTLY_SENT_CHAT_MESSAGES) {
+      return fail_query_flood_limit_exceeded(std::move(query));
+    }
+
+    check_messages(
+        from_chat_id, std::move(message_ids), true, AccessRights::Read, "message to forward", std::move(query),
+        [this, chat_id, message_thread_id, disable_notification, protect_content](
+            int64 from_chat_id, td::vector<int64> message_ids, PromisedQueryPtr query) {
+          auto &count = yet_unsent_message_count_[chat_id];
+          if (count >= MAX_CONCURRENTLY_SENT_CHAT_MESSAGES) {
+            return fail_query_flood_limit_exceeded(std::move(query));
+          }
+
+          auto message_count = message_ids.size();
+          count += static_cast<int32>(message_count);
+
+          send_request(make_object<td_api::forwardMessages>(
+                           chat_id, message_thread_id, from_chat_id, std::move(message_ids),
+                           get_message_send_options(disable_notification, protect_content), false, false),
+                       td::make_unique<TdOnForwardMessagesCallback>(this, chat_id, message_count, std::move(query)));
+        });
+  };
+  check_reply_parameters(chat_id, InputReplyParameters(), message_thread_id, std::move(query), std::move(on_success));
+
+  return td::Status::OK();
+}
+
 td::Status Client::process_send_media_group_query(PromisedQueryPtr &query) {
   auto chat_id = query->arg("chat_id");
   auto message_thread_id = get_message_id(query.get(), "message_thread_id");

telegram-bot-api/Client.h

@@ -70,7 +70,7 @@ class Client final : public WebhookActor::Callback {
   static constexpr int32 MAX_CERTIFICATE_FILE_SIZE = 3 << 20;
   static constexpr int32 MAX_DOWNLOAD_FILE_SIZE = 20 << 20;
 
-  static constexpr int32 MAX_CONCURRENTLY_SENT_CHAT_MESSAGES = 250;  // some unreasonably big value
+  static constexpr int32 MAX_CONCURRENTLY_SENT_CHAT_MESSAGES = 310;  // some unreasonably big value
 
   static constexpr std::size_t MIN_PENDING_UPDATES_WARNING = 200;
 
@@ -188,6 +188,7 @@ class Client final : public WebhookActor::Callback {
   class TdOnGetUserProfilePhotosCallback;
   class TdOnSendMessageCallback;
   class TdOnSendMessageAlbumCallback;
+  class TdOnForwardMessagesCallback;
   class TdOnDeleteFailedToSendMessageCallback;
   class TdOnEditMessageCallback;
   class TdOnEditInlineMessageCallback;
@@ -592,6 +593,7 @@ class Client final : public WebhookActor::Callback {
   td::Status process_stop_poll_query(PromisedQueryPtr &query);
   td::Status process_copy_message_query(PromisedQueryPtr &query);
   td::Status process_forward_message_query(PromisedQueryPtr &query);
+  td::Status process_forward_messages_query(PromisedQueryPtr &query);
   td::Status process_send_media_group_query(PromisedQueryPtr &query);
   td::Status process_send_chat_action_query(PromisedQueryPtr &query);
   td::Status process_edit_message_text_query(PromisedQueryPtr &query);