Invites.py

import discord
import DiscordUtils
from discord.ext import commands

class Invites(commands.Cog):
    def __init__(self, bot):
        self.bot = bot
        self.tracker = DiscordUtils.InviteTracker(bot)

    @commands.Cog.listener()
    async def on_ready(self):
        await self.tracker.cache_invites()

    @commands.Cog.listener()
    async def on_invite_create(self, invite):
        await self.tracker.update_invite_cache(invite)

    @commands.Cog.listener()
    async def on_guild_join(self, guild):
        await self.tracker.update_guild_cache(guild)

    @commands.Cog.listener()
    async def on_invite_delete(self, invite):
        await self.tracker.remove_invite_cache(invite)

    @commands.Cog.listener()
    async def on_guild_remove(self, guild):
        await self.tracker.remove_guild_cache(guild)

def setup(bot):
    bot.add_cog(Invites(bot))