Fix staff checks for slash commands

kurisu.py

@@ -23,7 +23,7 @@
 from subprocess import check_output, CalledProcessError
 from typing import Optional
 from utils import WarnsManager, ConfigurationManager, RestrictionsManager, ExtrasManager, FiltersManager, UserLogManager
-from utils.checks import InsufficientStaffRank
+from utils.checks import InsufficientStaffRank, AppInsufficientStaffRank
 from utils.help import KuriHelp, HelpView, CategorySelect, MainHelpPaginator
 from utils.utils import create_error_embed
 from utils.context import KurisuContext
@@ -439,7 +439,7 @@ async def on_error(
         elif isinstance(error, app_commands.MissingPermissions):
             await ctx.send(f"{author.mention} You don't have permission to use `{command}`.", ephemeral=True)
 
-        elif isinstance(error, InsufficientStaffRank):
+        elif isinstance(error, AppInsufficientStaffRank):
             await ctx.send(str(error), ephemeral=True)
 
         elif isinstance(error, app_commands.CheckFailure):

utils/checks.py

@@ -1,6 +1,7 @@
 import discord
 
 from discord import app_commands
+from discord.app_commands import AppCommandError
 from discord.ext import commands
 from utils.configuration import StaffRank
 from typing import TYPE_CHECKING
@@ -9,7 +10,11 @@
     from kurisu import Kurisu
 
 
-class InsufficientStaffRank(commands.CheckFailure):
+class InsufficientStaffRank(commands.CheckFailure, AppCommandError):
+    message: str
+
+
+class AppInsufficientStaffRank(app_commands.CheckFailure):
     message: str
 
 
@@ -25,7 +30,7 @@ def is_staff_app(role: str):
     async def predicate(interaction: discord.Interaction) -> bool:
         if (interaction.guild and interaction.user == interaction.guild.owner) or check_staff(interaction.client, role, interaction.user.id):
             return True
-        raise InsufficientStaffRank(f"You must be at least {role} to use this command.")
+        raise AppInsufficientStaffRank(f"You must be at least {role} to use this command.")
     return app_commands.check(predicate)