From fe224fd35b70ef7b121dcc309aa8db28e4808686 Mon Sep 17 00:00:00 2001
From: Serj Berbeha <sergorgen@gmail.com>
Date: Fri, 19 Apr 2024 13:57:48 +0300
Subject: [PATCH] Expand HTML tag checks for existing entities Just added the
 necessary tag checks for ALREADY existing `MessageEntitySpoiler` entity and
 expanded checking for `MessageEntityStrike` by adding one conservative
 `strike` tag

---
 telethon/extensions/html.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/telethon/extensions/html.py b/telethon/extensions/html.py
index ae45a763..56c0cacc 100644
--- a/telethon/extensions/html.py
+++ b/telethon/extensions/html.py
@@ -14,7 +14,7 @@ from ..tl.types import (
     MessageEntityPre, MessageEntityEmail, MessageEntityUrl,
     MessageEntityTextUrl, MessageEntityMentionName,
     MessageEntityUnderline, MessageEntityStrike, MessageEntityBlockquote,
-    TypeMessageEntity
+    MessageEntitySpoiler, TypeMessageEntity
 )
 
 
@@ -40,8 +40,10 @@ class HTMLToTelegramParser(HTMLParser):
             EntityType = MessageEntityItalic
         elif tag == 'u':
             EntityType = MessageEntityUnderline
-        elif tag == 'del' or tag == 's':
+        elif tag in ('del', 's', 'strike'):
             EntityType = MessageEntityStrike
+        elif tag == 'details':
+            EntityType = MessageEntitySpoiler
         elif tag == 'blockquote':
             EntityType = MessageEntityBlockquote
         elif tag == 'code':
@@ -132,6 +134,7 @@ def parse(html: str) -> Tuple[str, List[TypeMessageEntity]]:
 ENTITY_TO_FORMATTER = {
     MessageEntityBold: ('<strong>', '</strong>'),
     MessageEntityItalic: ('<em>', '</em>'),
+    MessageEntitySpoiler: ('<details>', '</details>'),
     MessageEntityCode: ('<code>', '</code>'),
     MessageEntityUnderline: ('<u>', '</u>'),
     MessageEntityStrike: ('<del>', '</del>'),