Use d.py tasks & handle NotFound error

screamer/bot.py

@@ -1,12 +1,13 @@
 from __future__ import unicode_literals
 
-import asyncio
 import logging
 import sys
 from datetime import datetime
 from io import TextIOWrapper
 
 import discord
+from discord.errors import NotFound
+from discord.ext import tasks
 
 from screamer.config import Config
 
@@ -17,44 +18,42 @@
 sys.stdout = TextIOWrapper(sys.stdout.detach(), encoding=sys.stdout.encoding, errors="replace", line_buffering=True)
 
 
-# Timestamp string
-def timestamp() -> str:
-    return datetime.utcnow().isoformat()
-
-
-# Message content
-def content() -> str:
-    return "\N{ZERO WIDTH SPACE}  \N{ANTENNA WITH BARS} Alive at `" + timestamp() + "`"
-
-
 # The bot
 class Screamer(discord.Client):
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.config = kwargs["config"]
-        self.message = None
+        self.scream_message = None
 
-    async def started(self):
+    @staticmethod
+    def timestamp() -> str:
+        return datetime.utcnow().isoformat()
+
+    @staticmethod
+    def scream_content() -> str:
+        return "\N{ZERO WIDTH SPACE}  \N{ANTENNA WITH BARS} Alive at `" + Screamer.timestamp() + "`"
+
+    async def scream_start(self):
         channel = await self.fetch_channel(self.config.channel)
-        await channel.send("\N{WHITE HEAVY CHECK MARK} **Started at `" + timestamp() + "`**")
-        self.message = await channel.send(content())
-
-    async def screamer(self):
-        while True:
-            try:
-                if self.message is None:
-                    await self.started()
-                else:
-                    await self.message.edit(content=content())
-            except Exception as e:
-                print(e)
-            await asyncio.sleep(15)
+        await channel.send("\N{WHITE HEAVY CHECK MARK} **Started at `" + Screamer.timestamp() + "`**")
+        self.scream_message = await channel.send(Screamer.scream_content())
+
+    @tasks.loop(seconds=15)
+    async def scream_task(self):
+        try:
+            if self.scream_message is None:
+                await self.scream_start()
+            else:
+                await self.scream_message.edit(content=Screamer.scream_content())
+        except NotFound:
+            await self.scream_start()
+        except Exception as e:
+            print(e)
 
     async def on_ready(self):
         print("Connected as " + self.user.name + " (" + str(self.user.id) + ")")
-
-        self.loop.create_task(self.screamer())
+        self.scream_task.start()
 
     def run(self):
         super().run(self.config.token)