bot.py

from discord.ext import commands
import discord
from cogs.utils import checks, context, db
from cogs.utils.config import Config
import datetime, re
import json, asyncio
import copy
import logging
import traceback
import aiohttp
import sys
from collections import Counter, deque

import config
import asyncpg

description = """
Hello! I am a bot written by Danny to provide some nice utilities.
"""

log = logging.getLogger(__name__)

initial_extensions = (
    'cogs.meta',
    'cogs.splatoon',
    'cogs.rng',
    'cogs.mod',
    'cogs.profile',
    'cogs.tags',
    'cogs.lounge',
    'cogs.carbonitex',
    'cogs.api',
    'cogs.stars',
    'cogs.admin',
    'cogs.buttons',
    'cogs.reminder',
    'cogs.stats',
    'cogs.emoji',
    'cogs.config',
    'cogs.dpy',
)

def _prefix_callable(bot, msg):
    user_id = bot.user.id
    base = [f'<@!{user_id}> ', f'<@{user_id}> ']
    if msg.guild is None:
        base.append('!')
        base.append('?')
    else:
        base.extend(bot.prefixes.get(msg.guild.id, ['?', '!']))
    return base

class RoboDanny(commands.AutoShardedBot):
    def __init__(self):
        super().__init__(command_prefix=_prefix_callable, description=description,
                         pm_help=None, help_attrs=dict(hidden=True), fetch_offline_members=False)

        self.client_id = config.client_id
        self.carbon_key = config.carbon_key
        self.bots_key = config.bots_key
        self.challonge_api_key = config.challonge_api_key
        self.session = aiohttp.ClientSession(loop=self.loop)

        self._prev_events = deque(maxlen=10)

        # guild_id: list
        self.prefixes = Config('prefixes.json')

        # guild_id and user_id mapped to True
        # these are users and guilds globally blacklisted
        # from using the bot
        self.blacklist = Config('blacklist.json')

        # in case of even further spam, add a cooldown mapping
        # for people who excessively spam commands
        self.spam_control = commands.CooldownMapping.from_cooldown(10, 12.0, commands.BucketType.user)

        # A counter to auto-ban frequent spammers
        # Triggering the rate limit 5 times in a row will auto-ban the user from the bot.
        self._auto_spam_count = Counter()

        for extension in initial_extensions:
            try:
                self.load_extension(extension)
            except Exception as e:
                print(f'Failed to load extension {extension}.', file=sys.stderr)
                traceback.print_exc()

    async def on_socket_response(self, msg):
        self._prev_events.append(msg)

    async def on_command_error(self, ctx, error):
        if isinstance(error, commands.NoPrivateMessage):
            await ctx.author.send('This command cannot be used in private messages.')
        elif isinstance(error, commands.DisabledCommand):
            await ctx.author.send('Sorry. This command is disabled and cannot be used.')
        elif isinstance(error, commands.CommandInvokeError):
            original = error.original
            if not isinstance(original, discord.HTTPException):
                print(f'In {ctx.command.qualified_name}:', file=sys.stderr)
                traceback.print_tb(original.__traceback__)
                print(f'{original.__class__.__name__}: {original}', file=sys.stderr)
        elif isinstance(error, commands.ArgumentParsingError):
            await ctx.send(error)

    def get_guild_prefixes(self, guild, *, local_inject=_prefix_callable):
        proxy_msg = discord.Object(id=None)
        proxy_msg.guild = guild
        return local_inject(self, proxy_msg)

    def get_raw_guild_prefixes(self, guild_id):
        return self.prefixes.get(guild_id, ['?', '!'])

    async def set_guild_prefixes(self, guild, prefixes):
        if len(prefixes) == 0:
            await self.prefixes.put(guild.id, [])
        elif len(prefixes) > 10:
            raise RuntimeError('Cannot have more than 10 custom prefixes.')
        else:
            await self.prefixes.put(guild.id, sorted(set(prefixes), reverse=True))


    async def add_to_blacklist(self, object_id):
        await self.blacklist.put(object_id, True)

    async def remove_from_blacklist(self, object_id):
        try:
            await self.blacklist.remove(object_id)
        except KeyError:
            pass

    async def on_ready(self):
        if not hasattr(self, 'uptime'):
            self.uptime = datetime.datetime.utcnow()

        print(f'Ready: {self.user} (ID: {self.user.id})')

    async def on_resumed(self):
        print('resumed...')

    @property
    def stats_webhook(self):
        wh_id, wh_token = self.config.stat_webhook
        hook = discord.Webhook.partial(id=wh_id, token=wh_token, adapter=discord.AsyncWebhookAdapter(self.session))
        return hook

    def log_spammer(self, ctx, message, retry_after, *, autoblock=False):
        guild_name = getattr(ctx.guild, 'name', 'No Guild (DMs)')
        guild_id = getattr(ctx.guild, 'id', None)
        fmt = 'User %s (ID %s) in guild %r (ID %s) spamming, retry_after: %.2fs'
        log.warning(fmt, message.author, message.author.id, guild_name, guild_id, retry_after)
        if not autoblock:
            return

        wh = self.stats_webhook
        embed = discord.Embed(title='Auto-blocked Member', colour=0xDDA453)
        embed.add_field(name='Member', value=f'{message.author} (ID: {message.author.id})', inline=False)
        embed.add_field(name='Guild Info', value=f'{guild_name} (ID: {guild_id})', inline=False)
        embed.add_field(name='Channel Info', value=f'{message.channel} (ID: {message.channel.id}', inline=False)
        embed.timestamp = datetime.datetime.utcnow()
        return wh.send(embed=embed)

    async def process_commands(self, message):
        ctx = await self.get_context(message, cls=context.Context)

        if ctx.command is None:
            return

        if ctx.author.id in self.blacklist:
            return

        if ctx.guild is not None and ctx.guild.id in self.blacklist:
            return

        bucket = self.spam_control.get_bucket(message)
        current = message.created_at.replace(tzinfo=datetime.timezone.utc).timestamp()
        retry_after = bucket.update_rate_limit(current)
        author_id = message.author.id
        if retry_after and author_id != self.owner_id:
            self._auto_spam_count[author_id] += 1
            if self._auto_spam_count[author_id] >= 2:
                await self.add_to_blacklist(author_id)
                del self._auto_spam_count[author_id]
                await self.log_spammer(ctx, message, retry_after, autoblock=True)
            else:
                self.log_spammer(ctx, message, retry_after)
            return
        else:
            self._auto_spam_count.pop(author_id, None)

        try:
            await self.invoke(ctx)
        finally:
            # Just in case we have any outstanding DB connections
            await ctx.release()

    async def on_message(self, message):
        if message.author.bot:
            return
        await self.process_commands(message)

    async def on_guild_join(self, guild):
        if guild.id in self.blacklist:
            await guild.leave()

    async def close(self):
        await super().close()
        await self.session.close()

    def run(self):
        try:
            super().run(config.token, reconnect=True)
        finally:
            with open('prev_events.log', 'w', encoding='utf-8') as fp:
                for data in self._prev_events:
                    try:
                        x = json.dumps(data, ensure_ascii=True, indent=4)
                    except:
                        fp.write(f'{data}\n')
                    else:
                        fp.write(f'{x}\n')

    @property
    def config(self):
        return __import__('config')