Allow to specify a chat as a local message sender.

GitOrigin-RevId: f1f5251b617a6f17188c7db49450a2eb433ef14c

td/generate/scheme/td_api.tl

@@ -3785,9 +3785,13 @@ sendChatSetTtlMessage chat_id:int53 ttl:int32 = Message;
 //@description Sends a notification about a screenshot taken in a chat. Supported only in private and secret chats @chat_id Chat identifier
 sendChatScreenshotTakenNotification chat_id:int53 = Ok;
 
-//@description Adds a local message to a chat. The message is persistent across application restarts only if the message database is used. Returns the added message @chat_id Target chat @sender_user_id Identifier of the user who will be shown as the sender of the message; may be 0 for channel posts
-//@reply_to_message_id Identifier of the message to reply to or 0 @disable_notification Pass true to disable notification for the message @input_message_content The content of the message to be added
-addLocalMessage chat_id:int53 sender_user_id:int32 reply_to_message_id:int53 disable_notification:Bool input_message_content:InputMessageContent = Message;
+//@description Adds a local message to a chat. The message is persistent across application restarts only if the message database is used. Returns the added message
+//@chat_id Target chat
+//@sender The sender sender of the message
+//@reply_to_message_id Identifier of the message to reply to or 0
+//@disable_notification Pass true to disable notification for the message
+//@input_message_content The content of the message to be added
+addLocalMessage chat_id:int53 sender:MessageSender reply_to_message_id:int53 disable_notification:Bool input_message_content:InputMessageContent = Message;
 
 //@description Deletes messages @chat_id Chat identifier @message_ids Identifiers of the messages to be deleted @revoke Pass true to try to delete messages for all chat members. Always true for supergroups, channels and secret chats
 deleteMessages chat_id:int53 message_ids:vector<int53> revoke:Bool = Ok;

td/telegram/MessagesManager.cpp

@@ -25459,8 +25459,8 @@ void MessagesManager::do_send_screenshot_taken_notification_message(DialogId dia
 }
 
 Result<MessageId> MessagesManager::add_local_message(
-    DialogId dialog_id, UserId sender_user_id, MessageId reply_to_message_id, bool disable_notification,
-    tl_object_ptr<td_api::InputMessageContent> &&input_message_content) {
+    DialogId dialog_id, td_api::object_ptr<td_api::MessageSender> &&sender, MessageId reply_to_message_id,
+    bool disable_notification, tl_object_ptr<td_api::InputMessageContent> &&input_message_content) {
   if (input_message_content == nullptr) {
     return Status::Error(5, "Can't add local message without content");
   }
@@ -25486,8 +25486,38 @@ Result<MessageId> MessagesManager::add_local_message(
   }
 
   bool is_channel_post = is_broadcast_channel(dialog_id);
-  if (sender_user_id != UserId() && !td_->contacts_manager_->have_user_force(sender_user_id)) {
-    return Status::Error(400, "User not found");
+  UserId sender_user_id;
+  DialogId sender_dialog_id;
+  if (sender != nullptr) {
+    switch (sender->get_id()) {
+      case td_api::messageSenderUser::ID:
+        sender_user_id = UserId(static_cast<const td_api::messageSenderUser *>(sender.get())->user_id_);
+        if (!td_->contacts_manager_->have_user_force(sender_user_id)) {
+          return Status::Error(400, "Sender user not found");
+        }
+        break;
+      case td_api::messageSenderChat::ID:
+        sender_dialog_id = DialogId(static_cast<const td_api::messageSenderChat *>(sender.get())->chat_id_);
+        if (sender_dialog_id.get_type() != DialogType::Channel) {
+          return Status::Error(400, "Sender chat must be a supergroup or channel");
+        }
+        if (!have_dialog_force(sender_dialog_id)) {
+          return Status::Error(400, "Sender chat not found");
+        }
+        break;
+      default:
+        UNREACHABLE();
+    }
+  } else if (is_channel_post) {
+    sender_dialog_id = dialog_id;
+  } else {
+    return Status::Error(400, "The message must have a sender");
+  }
+  if (is_channel_post && sender_user_id.is_valid()) {
+    return Status::Error(400, "Channel post can't have a sender user");
+  }
+  if (is_channel_post && sender_dialog_id != dialog_id) {
+    return Status::Error(400, "Channel post must have the channel as a sender");
   }
 
   auto dialog_type = dialog_id.get_type();
@@ -25513,9 +25543,10 @@ Result<MessageId> MessagesManager::add_local_message(
     if (td_->contacts_manager_->get_channel_sign_messages(dialog_id.get_channel_id())) {
       m->author_signature = td_->contacts_manager_->get_user_title(sender_user_id);
     }
-    m->sender_dialog_id = dialog_id;
+    m->sender_dialog_id = sender_dialog_id;
   } else {
     m->sender_user_id = sender_user_id;
+    m->sender_dialog_id = sender_dialog_id;
   }
   m->date = G()->unix_time();
   m->reply_to_message_id = get_reply_to_message_id(d, MessageId(), reply_to_message_id);

td/telegram/MessagesManager.h

@@ -425,9 +425,10 @@ class MessagesManager : public Actor {
 
   Status send_screenshot_taken_notification_message(DialogId dialog_id);
 
-  Result<MessageId> add_local_message(
-      DialogId dialog_id, UserId sender_user_id, MessageId reply_to_message_id, bool disable_notification,
-      tl_object_ptr<td_api::InputMessageContent> &&input_message_content) TD_WARN_UNUSED_RESULT;
+  Result<MessageId> add_local_message(DialogId dialog_id, td_api::object_ptr<td_api::MessageSender> &&sender,
+                                      MessageId reply_to_message_id, bool disable_notification,
+                                      tl_object_ptr<td_api::InputMessageContent> &&input_message_content)
+      TD_WARN_UNUSED_RESULT;
 
   void edit_message_text(FullMessageId full_message_id, tl_object_ptr<td_api::ReplyMarkup> &&reply_markup,
                          tl_object_ptr<td_api::InputMessageContent> &&input_message_content, Promise<Unit> &&promise);

td/telegram/Td.cpp

@@ -5710,8 +5710,8 @@ void Td::on_request(uint64 id, td_api::addLocalMessage &request) {
 
   DialogId dialog_id(request.chat_id_);
   auto r_new_message_id = messages_manager_->add_local_message(
-      dialog_id, UserId(request.sender_user_id_), MessageId(request.reply_to_message_id_),
-      request.disable_notification_, std::move(request.input_message_content_));
+      dialog_id, std::move(request.sender_), MessageId(request.reply_to_message_id_), request.disable_notification_,
+      std::move(request.input_message_content_));
   if (r_new_message_id.is_error()) {
     return send_closure(actor_id(this), &Td::send_error, id, r_new_message_id.move_as_error());
   }

td/telegram/cli.cpp

@@ -509,12 +509,12 @@ class CliClient final : public Actor {
     return as_message_id(str);
   }
 
-  td_api::object_ptr<td_api::MessageSender> as_message_sender(Slice str) const {
-    str = trim(str);
-    if (str.empty() || str[0] != '-') {
-      return td_api::make_object<td_api::messageSenderUser>(as_user_id(str));
+  td_api::object_ptr<td_api::MessageSender> as_message_sender(Slice sender_id) const {
+    sender_id = trim(sender_id);
+    if (sender_id.empty() || sender_id[0] != '-') {
+      return td_api::make_object<td_api::messageSenderUser>(as_user_id(sender_id));
     } else {
-      return td_api::make_object<td_api::messageSenderChat>(as_chat_id(str));
+      return td_api::make_object<td_api::messageSenderChat>(as_chat_id(sender_id));
     }
   }
 
@@ -3024,18 +3024,18 @@ class CliClient final : public Actor {
                    op == "sms", false, as_message_id(reply_to_message_id));
     } else if (op == "alm" || op == "almr") {
       string chat_id;
-      string user_id;
+      string sender_id;
       string reply_to_message_id;
       string message;
 
       std::tie(chat_id, args) = split(args);
-      std::tie(user_id, message) = split(args);
+      std::tie(sender_id, message) = split(args);
       if (op == "almr") {
         std::tie(reply_to_message_id, message) = split(message);
       }
 
       send_request(td_api::make_object<td_api::addLocalMessage>(
-          as_chat_id(chat_id), as_user_id(user_id), as_message_id(reply_to_message_id), false,
+          as_chat_id(chat_id), as_message_sender(sender_id), as_message_id(reply_to_message_id), false,
           td_api::make_object<td_api::inputMessageText>(as_formatted_text(message), false, true)));
     } else if (op == "smap" || op == "smapr") {
       string chat_id;