From a4d80c76b3beff7a55e8e92adc126bb49214edee Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Mon, 31 Jan 2022 02:19:17 +0300
Subject: [PATCH] Allow middle dot in hashtags.

---
 td/telegram/MessageEntity.cpp | 2 +-
 test/message_entities.cpp     | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/td/telegram/MessageEntity.cpp b/td/telegram/MessageEntity.cpp
index d643e3b05..5f645bfa2 100644
--- a/td/telegram/MessageEntity.cpp
+++ b/td/telegram/MessageEntity.cpp
@@ -318,7 +318,7 @@ static vector<Slice> match_bot_commands(Slice str) {
 
 static bool is_hashtag_letter(uint32 c, UnicodeSimpleCategory &category) {
   category = get_unicode_simple_category(c);
-  if (c == '_' || c == 0x200c) {
+  if (c == '_' || c == 0x200c || c == 0xb7) {
     return true;
   }
   switch (category) {
diff --git a/test/message_entities.cpp b/test/message_entities.cpp
index 6c24ffba6..8bf589997 100644
--- a/test/message_entities.cpp
+++ b/test/message_entities.cpp
@@ -109,6 +109,7 @@ TEST(MessageEntities, hashtag) {
   check_hashtag(" #" + td::string(255, '1') + "a" + td::string(255, 'b') + "# ", {});
   check_hashtag("#a#b #c #d", {"#c", "#d"});
   check_hashtag("#test", {"#test"});
+  check_hashtag("#te·st", {"#te·st"});
   check_hashtag(u8"\U0001F604\U0001F604\U0001F604\U0001F604 \U0001F604\U0001F604\U0001F604#" + td::string(200, '1') +
                     "ООО" + td::string(200, '2'),
                 {"#" + td::string(200, '1') + "ООО" + td::string(53, '2')});