Remove unallowed reply quote entities.

td/generate/scheme/td_api.tl

@@ -1229,7 +1229,7 @@ messageSendingStateFailed error:error can_retry:Bool need_another_sender:Bool re
 //@description Describes a message replied by a given message
 //@chat_id The identifier of the chat to which the message belongs; may be 0 if the replied message is in another chat and isn't accessible
 //@message_id The identifier of the message; may be 0 if the replied message is in another chat and isn't accessible
-//@quote Manually or automatically chosen quote from the replied message; may be null if none
+//@quote Manually or automatically chosen quote from the replied message; may be null if none. Only Bold, Italic, Underline, Strikethrough, Spoiler, and CustomEmoji entities can be present in the quote
 //@is_quote_manual True, if the quote was manually chosen by the message sender
 //@origin Information about origin of the message if the message was replied from another chat; may be null for messages from the same chat
 //@origin_send_date Point in time (Unix timestamp) when the message was sent if the message was replied from another chat; 0 for messages from the same chat
@@ -1247,7 +1247,8 @@ messageReplyToStory story_sender_chat_id:int53 story_id:int32 = MessageReplyTo;
 //@description Describes a message to be replied
 //@chat_id The identifier of the chat to which the message to be replied belongs; pass 0 if the replied message is in the same chat. A message can be replied in another chat only if message.can_be_forwarded
 //@message_id The identifier of the message to be replied in the same chat
-//@quote Manually chosen quote from the replied message; pass null if none; 0-getOption("message_reply_quote_length_max") characters
+//@quote Manually chosen quote from the replied message; pass null if none; 0-getOption("message_reply_quote_length_max") characters.
+//-Only Bold, Italic, Underline, Strikethrough, Spoiler, and CustomEmoji entities are allowed to be kept and must be kept in the quote
 inputMessageReplyToMessage chat_id:int53 message_id:int53 quote:formattedText = InputMessageReplyTo;
 
 //@description Describes a story to be replied @story_sender_chat_id The identifier of the sender of the story. Currently, stories can be replied only in the sender's chat @story_id The identifier of the story

td/telegram/MessageEntity.cpp

@@ -1415,6 +1415,24 @@ void remove_empty_entities(vector<MessageEntity> &entities) {
   });
 }
 
+static bool is_allowed_quote_entity(const MessageEntity &entity) {
+  switch (entity.type) {
+    case MessageEntity::Type::Bold:
+    case MessageEntity::Type::Italic:
+    case MessageEntity::Type::Underline:
+    case MessageEntity::Type::Strikethrough:
+    case MessageEntity::Type::Spoiler:
+    case MessageEntity::Type::CustomEmoji:
+      return true;
+    default:
+      return false;
+  }
+}
+
+void remove_unallowed_quote_entities(FormattedText &text) {
+  td::remove_if(text.entities, [](const auto &entity) { return !is_allowed_quote_entity(entity); });
+}
+
 static int32 text_length(Slice text) {
   return narrow_cast<int32>(utf8_utf16_length(text));
 }

td/telegram/MessageEntity.h

@@ -183,6 +183,8 @@ vector<std::pair<Slice, int32>> find_media_timestamps(Slice str);  // slice + me
 
 void remove_empty_entities(vector<MessageEntity> &entities);
 
+void remove_unallowed_quote_entities(FormattedText &text);
+
 string get_first_url(const FormattedText &text);
 
 bool is_visible_url(const FormattedText &text, const string &url);

td/telegram/MessageInputReplyTo.cpp

@@ -68,6 +68,7 @@ MessageInputReplyTo::MessageInputReplyTo(Td *td,
           entities.clear();
         }
         quote_ = FormattedText{std::move(reply_to->quote_text_), std::move(entities)};
+        remove_unallowed_quote_entities(quote_);
       }
       break;
     }

td/telegram/MessageInputReplyTo.h

@@ -44,6 +44,7 @@ class MessageInputReplyTo {
 
   MessageInputReplyTo(MessageId message_id, DialogId dialog_id, FormattedText &&quote)
       : message_id_(message_id), dialog_id_(dialog_id), quote_(std::move(quote)) {
+    remove_unallowed_quote_entities(quote_);
   }
 
   explicit MessageInputReplyTo(StoryFullId story_full_id) : story_full_id_(story_full_id) {

td/telegram/MessageInputReplyTo.hpp

@@ -60,6 +60,7 @@ void MessageInputReplyTo::parse(ParserT &parser) {
   }
   if (has_quote) {
     td::parse(quote_, parser);
+    remove_unallowed_quote_entities(quote_);
   }
   if (has_dialog_id) {
     td::parse(dialog_id_, parser);

td/telegram/RepliedMessageInfo.cpp

@@ -144,6 +144,7 @@ RepliedMessageInfo::RepliedMessageInfo(Td *td, tl_object_ptr<telegram_api::messa
       entities.clear();
     }
     quote_ = FormattedText{std::move(reply_header->quote_text_), std::move(entities)};
+    remove_unallowed_quote_entities(quote_);
   }
 }
 

td/telegram/RepliedMessageInfo.hpp

@@ -84,6 +84,7 @@ void RepliedMessageInfo::parse(ParserT &parser) {
   }
   if (has_quote) {
     td::parse(quote_, parser);
+    remove_unallowed_quote_entities(quote_);
   }
   if (has_content) {
     parse_message_content(content_, parser);