detect help request with regex

nomen/main.py

@@ -9,6 +9,7 @@ import traceback
 from contextlib import redirect_stdout
 
 import disnake
+import re2 as re
 from disnake import Embed, Guild, Intents, Message, Thread
 from disnake.ext import commands
 from disnake.ext.commands import Bot, Paginator
@@ -17,7 +18,7 @@ from dotenv import find_dotenv, load_dotenv
 from .db import run_db_migrations, setup_db
 from .notifications import Notifications
 from .settings import Settings
-from .utils import cleanup_code
+from .utils import cleanup_code, contains
 
 # Logger setup
 logger_disnake = logging.getLogger("disnake")
@@ -228,9 +229,11 @@ async def on_message(message: Message):
         if now < timeout:
             return
 
-    c = message.content.lower().split(" ")
+    mentions_nomen = contains(message, "nomen", False)
+    mentions_help = contains(message, "help", False)
+    asks_for_help = contains(message, r"how\b(\w+\b)+use\b(\w+\b)*nomen", True)
 
-    if "help" in c and "nomen" in c:
+    if (mentions_nomen and mentions_help) or asks_for_help:
         help_timeouts[ctx.channel.id] = now + datetime.timedelta(minutes=5)
         prefix = (await bot.get_guild_prefix(ctx.guild) if ctx.guild else DEFAULT_PREFIX) or "@nomen "
         await message.reply(f"""\

nomen/notifications.py

@@ -31,7 +31,7 @@ class KeywordError(Exception):
 
     async def send(self, ctx):
         if self.msg:
-            await ctx.send(self.msg + " (check DMs)")
+            await ctx.send(self.msg + (" (check DMs)" if self.dm_msg else ""))
         if self.dm_msg:
             await ctx.author.send(self.dm_msg)