Filter seemingly empty messages from random messages

bot.py

@@ -10,6 +10,7 @@ from discord.ext import commands
 from dotenv import load_dotenv
 
 from lib.config import config, config_meta, config_load, config_save, config_get, config_set, config_get_descriptions
+from lib.utils import async_filter
 
 load_dotenv()
 TOKEN = os.getenv('DISCORD_TOKEN')
@@ -120,7 +121,8 @@ async def random_message_command(ctx: commands.Context, channel: Optional[discor
     typing = ctx.channel.trigger_typing()
     if channel is None:
         channel = ctx.channel
-    messages = await channel.history(limit=max_cnt).flatten()
+    messages = async_filter(lambda m: m.clean_content.strip() != '', channel.history(limit=max_cnt))
+    messages = [item async for item in messages]
     msg: discord.Message = random.choice(messages)
     author: discord.abc.User = msg.author
     embed = discord.Embed(

lib/utils.py

@@ -0,0 +1,8 @@
+from collections import AsyncIterable
+from typing import Callable, AsyncGenerator
+
+
+async def async_filter(fun: Callable, iterable: AsyncIterable) -> AsyncGenerator:
+    async for val in iterable:
+        if fun(val):
+            yield val