Add chain plugin

stdplugins/chain.py

@@ -0,0 +1,23 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from telethon import events
+from telethon.tl.functions.messages import SaveDraftRequest
+
+@borg.on(events.NewMessage(pattern=r"\.chain", outgoing=True))
+async def _(event):
+    await event.edit("Counting...")
+    count = -1
+    message = event.message
+    while message:
+        reply = await message.get_reply_message()
+        if reply is None:
+            await borg(SaveDraftRequest(
+                await event.get_input_chat(),
+                "",
+                reply_to_msg_id=message.id
+            ))
+        message = reply
+        count += 1
+    await event.edit(f"Chain length: {count}")