bot/clients/discord.py

import datetime
import re
import time

import discord
import twitter

from commands import CommandError


# @everyone Lilia is Live! Playing $game ! Come and say hi at $url !
ANNOUNCEMENT_PATTERN = re.compile(r'''^
    @everyone\s+
    Lilia\s+is\s+Live!\s+
    Playing\s+(?P<game>.+)\s+!\s+
    Come\s+and\s+say\s+hi\s+at\s+(?P<url>.+)\s+!
    $''', re.VERBOSE)


def cooldown(retries, timeout, failure):
    def do_cooldown(function):
        def wrapper(self, server, user, *args, **kwargs):
            cooldowns = getattr(function, 'cooldowns', {})
            hash = '{0}:{1}'.format(server, user)
            if hash not in cooldowns:
                cooldowns[hash] = dict(tries=0, last_run=0)
            cd = cooldowns[hash]
            if cd['tries'] < retries:
                cd['tries'] += 1
                cd['last_run'] = time.time()
                setattr(function, 'cooldowns', cooldowns)
                return function(self, server, user, *args, **kwargs)
            if time.time() - cd['last_run'] > timeout:
                cd['tries'] = 1
                cd['last_run'] = time.time()
                setattr(function, 'cooldowns', cooldowns)
                return function(self, server, user, *args, **kwargs)
            return failure(self, server, user, *args, **kwargs)
        return wrapper
    return do_cooldown


class DiscordClient(discord.Client):

    def __init__(self, config, logger, commands, extra_commands):
        self.config = config
        self.logger = logger
        self.commands = commands
        self.extra_commands = extra_commands
        self.twitter_api = twitter.Api(
            consumer_key=self.config['Twitter'].get('consumer_key'),
            consumer_secret=self.config['Twitter'].get('consumer_secret'),
            access_token_key=self.config['Twitter'].get('access_token_key'),
            access_token_secret=self.config['Twitter'].get('access_token_secret'))
        self.supported_commands = [
            (re.compile(r'^!lastquote$'), self._do_lastquote),
            (re.compile(r'^!findquote\s+(?P<q>")?(?P<filter>.+)(?(q)")$'), self._do_findquote),
            (re.compile(r'^!(bella(gram|pics)|insta(gram|bella))$'), self._do_bellagram),
            (re.compile(r'^!yt\s+(?P<q>")?(?P<query>.+)(?(q)")$'), self._do_yt),
            (re.compile(r'^!clip\s+(?P<q>")?(?P<filter>.+)(?(q)")$'), self._do_clip),
        ]
        super(DiscordClient, self).__init__()

    async def start_(self):
        token = self.config['Discord'].get('token')
        await self.start(token)

    async def on_ready(self):
        self.logger.info('Logged in as {0}'.format(self.user.name))

    async def on_message(self, message):
        await self._process_announcement(message)
        server = message.server.id if message.server else None
        for pattern, action in self.supported_commands:
            m = pattern.match(message.content)
            if m:
                await action(server, message.author.id, message, **m.groupdict())
        for cmd, resp in self.extra_commands.items():
            if cmd == message.content:
                await self.send_message(message.channel, resp.format(user=message.author.mention))

    async def _process_announcement(self, message):
        announcer = self.config['Discord'].get('announcer')
        channels = self.config['Discord'].get('announcement_channels').split(',')
        if message.author.id != announcer or message.channel.id not in channels:
            return
        after = datetime.datetime.utcnow() - datetime.timedelta(minutes=5)
        for channel in [discord.Object(c) for c in channels if c != message.channel.id]:
            async for msg in self.logs_from(channel, after=after):
                if msg.content == message.content:
                    return
            try:
                await self.send_message(channel, message.content)
            except discord.errors.Forbidden:
                pass
        announcement = self.config['Twitter'].get('announcement_pattern')
        m = ANNOUNCEMENT_PATTERN.match(message.content)
        if m:
            self.twitter_api.PostUpdate(announcement.format(**m.groupdict()))

    async def _cooldown_failure(self, server, user, message, **kwargs):
        await self.send_message(message.channel,
            'Sorry {0}, you have to wait a while before running '
            'the same command again'.format(message.author.mention))

    def _format_quote(self, quote):
        if '"' not in quote['text']:
            quote['text'] = '"{0}"'.format(quote['text'])
        return 'One time, Lilia said this... `#{id}: {text} [{game}] [{date}]`'.format(**quote)

    async def _do_lastquote(self, server, user, message, **kwargs):
        try:
            result = self.commands.last_quote()
        except CommandError as e:
            await self.send_message(message.channel, 'Sorry {0}, {1}'.format(message.author.mention, e))
        else:
            await self.send_message(message.channel, self._format_quote(result))

    async def _do_findquote(self, server, user, message, filter, **kwargs):
        try:
            result = self.commands.find_quote(filter)
        except CommandError as e:
            await self.send_message(message.channel, 'Sorry {0}, {1}'.format(message.author.mention, e))
        else:
            await self.send_message(message.channel, self._format_quote(result))

    @cooldown(retries=2, timeout=5*60, failure=_cooldown_failure)
    async def _do_bellagram(self, server, user, message, **kwargs):
        try:
            bellagram = self.commands.bellagram()
        except CommandError as e:
            await self.send_message(message.channel, 'Sorry {0}, {1}'.format(message.author.mention, e))
        else:
            embed = discord.Embed(title=bellagram['title'], url=bellagram['url'], color=0xd2a517)
            embed.set_image(url=bellagram['display_url'])
            embed.set_author(name=bellagram['owner'], url=bellagram['owner_url'],
                icon_url=bellagram['owner_pic_url'])
            await self.send_message(message.channel, embed=embed)

    @cooldown(retries=3, timeout=5*60, failure=_cooldown_failure)
    async def _do_yt(self, server, user, message, query, **kwargs):
        try:
            result = self.commands.query_youtube(query)
        except CommandError as e:
            await self.send_message(message.channel, 'Sorry {0}, {1}'.format(message.author.mention, e))
        else:
            if result['kind'] == 'playlist':
                embed = discord.Embed(title=result['title'], url=result['url'],
                    description=result['description'], color=0xff0000)
                embed.set_thumbnail(url=result['thumbnail_url'])
                embed.set_author(name=result['channel_title'], url=result['channel_url'],
                    icon_url=result['channel_thumbnail_url'])
                await self.send_message(message.channel, embed=embed)
            else:
                await self.send_message(message.channel, '{title}\n{url}'.format(**result))

    @cooldown(retries=3, timeout=5*60, failure=_cooldown_failure)
    async def _do_clip(self, server, user, message, filter, **kwargs):
        try:
            result = self.commands.find_clip(filter)
        except CommandError as e:
            await self.send_message(message.channel, 'Sorry {0}, {1}'.format(message.author.mention, e))
        else:
            await self.send_message(message.channel, '{title}\n{url}'.format(**result))