From a1b2364fc1326fd8956a94974e82b81d3331fc53 Mon Sep 17 00:00:00 2001
From: Danny Lin <danny@kdrag0n.dev>
Date: Sat, 27 Nov 2021 20:56:59 -0800
Subject: [PATCH] Add support for new invite link format

Recently, Telegram changed the invite link format for private groups
so they look like t.me/+InviteHash instead of the old
t.me/joinchat/InviteHash format, but the actual invite hashes are the
same. Add support for the new "+" format to the username regex.
---
 telethon/utils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/telethon/utils.py b/telethon/utils.py
index e8c59c01..b83dd573 100644
--- a/telethon/utils.py
+++ b/telethon/utils.py
@@ -54,7 +54,7 @@ mimetypes.add_type('audio/flac', '.flac')
 mimetypes.add_type('application/x-tgsticker', '.tgs')
 
 USERNAME_RE = re.compile(
-    r'@|(?:https?://)?(?:www\.)?(?:telegram\.(?:me|dog)|t\.me)/(@|joinchat/)?'
+    r'@|(?:https?://)?(?:www\.)?(?:telegram\.(?:me|dog)|t\.me)/(@|\+|joinchat/)?'
 )
 TG_JOIN_RE = re.compile(
     r'tg://(join)\?invite='