port axe from kateborg

this more of an exercise to learn asyncio than it is an actual plugin

stdplugins/axe.py

@@ -0,0 +1,40 @@
+# 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/.
+
+import asyncio
+import re
+
+from telethon import events
+from telethon.tl.types import Message
+
+pattern = re.compile(r'(?i)^a+nd\b')
+
+
+@borg.on(events.NewMessage)
+async def and_my_axe(event):
+    async def next_match(event):
+        if pattern.match(event.raw_text):
+            raise events.StopPropagation
+        return True
+
+    prev_event = None
+    while pattern.match(event.raw_text):
+        prev_message = getattr(prev_event, 'message', None)
+        if event.is_reply:
+            prev_message = await event.reply_message
+            if not (isinstance(prev_message, Message)
+                    and pattern.match(prev_message.message)):
+                return
+
+        if prev_message:
+            if event.message.from_id != prev_message.from_id:
+                await event.reply('and my axe!')
+                return
+            if event.is_reply:
+                return
+
+        prev_event = event
+        event = await borg.await_event(
+                events.NewMessage(chats=await event.input_chat), next_match
+            )