From 06e74cfba9fd1274805dc96a4da0444a8ee5923f Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Wed, 22 Apr 2020 00:57:00 +0300
Subject: [PATCH] Remove whitespace-only entities added in merge_entities.

GitOrigin-RevId: 8b2dbe05d0758639c4447fbfec038b8350dfda9a
---
 td/telegram/MessageEntity.cpp | 3 +++
 test/message_entities.cpp     | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/td/telegram/MessageEntity.cpp b/td/telegram/MessageEntity.cpp
index ad2cc5004..542d1f534 100644
--- a/td/telegram/MessageEntity.cpp
+++ b/td/telegram/MessageEntity.cpp
@@ -3818,6 +3818,9 @@ Status fix_formatted_text(string &text, vector<MessageEntity> &entities, bool al
     merge_new_entities(entities, find_entities(text, skip_bot_commands));
   }
 
+  // new whitespace-only entities could be added after splitting of entities
+  remove_invalid_entities(text, entities);
+
   // TODO MAX_MESSAGE_LENGTH and MAX_CAPTION_LENGTH
 
   return Status::OK();
diff --git a/test/message_entities.cpp b/test/message_entities.cpp
index ae4b7a31b..9b20b0bd1 100644
--- a/test/message_entities.cpp
+++ b/test/message_entities.cpp
@@ -815,6 +815,11 @@ TEST(MessageEntities, fix_formatted_text) {
                            "abc", {{td::MessageEntity::Type::Italic, 0, 2}, {td::MessageEntity::Type::Bold, 2, 1}});
   check_fix_formatted_text("abc", {{td::MessageEntity::Type::Italic, 0, 1}, {td::MessageEntity::Type::Bold, 2, 1}},
                            "abc", {{td::MessageEntity::Type::Italic, 0, 1}, {td::MessageEntity::Type::Bold, 2, 1}});
+  check_fix_formatted_text("@tests @tests", {{td::MessageEntity::Type::Italic, 0, 13}}, "@tests @tests",
+                           {{td::MessageEntity::Type::Mention, 0, 6},
+                            {td::MessageEntity::Type::Italic, 0, 6},
+                            {td::MessageEntity::Type::Mention, 7, 6},
+                            {td::MessageEntity::Type::Italic, 7, 6}});
 
   // _a*b*_
   check_fix_formatted_text(