Added support for extracting IDs and fetching content from Telegram “openmessage” links (#471)

Added support to fetch message content from Telegram “openmessage” links.

plugins/utilities.py

@@ -743,14 +743,21 @@ async def get_restricted_msg(event):
     chat, msg = get_chat_and_msgid(match)
     if not (chat and msg):
         return await event.eor(
-            "Invalid link!\nEg: `https://t.me/TeamUltroid/3` or `https://t.me/c/1313492028/3`"
+            "Invalid link!\nExamples:\n"
+            "`https://t.me/TeamUltroid/3`\n"
+            "`https://t.me/c/1313492028/3`\n"
+            "`tg://openmessage?user_id=1234567890&message_id=1`"
         )
     
     try:
-        message = await event.client.get_messages(chat, ids=msg)
+        input_entity = await event.client.get_input_entity(chat)
+        message = await event.client.get_messages(input_entity, ids=msg)
     except BaseException as er:
         return await event.eor(f"**ERROR**\n`{er}`")
     
+    if not message:
+        return await event.eor("`Message not found or may not exist.`")
+    
     try:
         await event.client.send_message(event.chat_id, message)
         await xx.try_delete()
@@ -819,3 +826,4 @@ async def get_restricted_msg(event):
             await event.eor("`Cannot process this type of media.`")
     else:
         await event.eor("`No media found in the message.`")
+