From 92f5d302507a2262c56934352253cfea7371ef18 Mon Sep 17 00:00:00 2001
From: Siphalor <info@siphalor.de>
Date: Sat, 19 Dec 2020 13:09:57 +0100
Subject: [PATCH] Filter seemingly empty messages from random messages

---
 bot.py       | 4 +++-
 lib/utils.py | 8 ++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 lib/utils.py

diff --git a/bot.py b/bot.py
index e1e915d..a91e688 100644
--- a/bot.py
+++ b/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(
diff --git a/lib/utils.py b/lib/utils.py
new file mode 100644
index 0000000..908cd65
--- /dev/null
+++ b/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