Support replies to ephemeral messages.

Author: levlam

td/telegram/MessageReplyHeader.cpp

@@ -34,17 +34,14 @@ MessageReplyHeader::MessageReplyHeader(Td *td, tl_object_ptr<telegram_api::Messa
   CHECK(reply_header_ptr->get_id() == telegram_api::messageReplyHeader::ID);
   auto reply_header = telegram_api::move_object_as<telegram_api::messageReplyHeader>(reply_header_ptr);
 
-  if (reply_header->reply_to_ephemeral_) {
-    return;
-  }
-
   bool can_have_thread = td->dialog_manager_->can_dialog_have_threads(dialog_id);
   if (!message_id.is_scheduled() && can_have_thread) {
     is_topic_message_ = reply_header->forum_topic_;
     if (reply_header->reply_to_top_id_ == 0 && is_topic_message_ && reply_header->reply_from_ != nullptr &&
         reply_header->reply_to_peer_id_ == nullptr && reply_header->reply_to_msg_id_ != 0) {
       reply_header->reply_to_top_id_ = reply_header->reply_to_msg_id_;
       reply_header->reply_to_msg_id_ = 0;
+      reply_header->reply_to_ephemeral_ = false;
     }
     if (reply_header->reply_to_top_id_ != 0) {
       top_thread_message_id_ = MessageId(ServerMessageId(reply_header->reply_to_top_id_));

td/telegram/RepliedMessageInfo.cpp

@@ -70,6 +70,15 @@ RepliedMessageInfo::RepliedMessageInfo(Td *td, tl_object_ptr<telegram_api::messa
       LOG(ERROR) << "Receive reply from other chat " << to_string(reply_header) << " in "
                  << MessageFullId{dialog_id, message_id};
     }
+  } else if (reply_header->reply_to_ephemeral_) {
+    if (reply_header->reply_to_msg_id_ == 0 || reply_header->reply_to_peer_id_ != nullptr ||
+        reply_header->reply_from_ != nullptr || reply_header->reply_media_ != nullptr ||
+        reply_header->todo_item_id_ != 0 || !reply_header->poll_option_.empty()) {
+      LOG(ERROR) << "Receive " << to_string(reply_header) << " in " << MessageFullId{dialog_id, message_id};
+    } else {
+      message_id_ = td->messages_manager_->get_message_id_of_ephemeral_message_id(
+          dialog_id, EphemeralMessageId(reply_header->reply_to_msg_id_));
+    }
   } else {
     if (reply_header->reply_to_msg_id_ != 0) {
       message_id_ = MessageId(ServerMessageId(reply_header->reply_to_msg_id_));