Add support for custom emoji in HTML

docs/source/topics/text-formatting.rst

@@ -122,6 +122,8 @@ To strictly use this mode, pass :obj:`~pyrogram.enums.HTML` to the *parse_mode*
 
     <code>inline fixed-width code</code>
 
+    <emoji id="12345678901234567890">🔥</emoji>
+
     <pre>
     pre-formatted
       fixed-width

pyrogram/parser/html.py

@@ -75,6 +75,10 @@ class Parser(HTMLParser):
             else:
                 entity = raw.types.MessageEntityTextUrl
                 extra["url"] = url
+        elif tag == "emoji":
+            entity = raw.types.MessageEntityCustomEmoji
+            custom_emoji_id = int(attrs.get("id"))
+            extra["document_id"] = custom_emoji_id
         else:
             return
 
@@ -185,6 +189,10 @@ class HTML:
                 user = entity.user
                 start_tag = f'<a href="tg://user?id={user.id}">'
                 end_tag = "</a>"
+            elif entity_type == MessageEntityType.CUSTOM_EMOJI:
+                custom_emoji_id = entity.custom_emoji_id
+                start_tag = f'<emoji id="{custom_emoji_id}">'
+                end_tag = "</emoji>"
             else:
                 continue