Initial commit

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "src/data"]
+	path = src/data
+	url = https://git.thewisewolf.dev/HoloTech/psqlmapper.git

data/schema.sql

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+-- Metadata {{{
+CREATE TABLE version_history(
+  component TEXT NOT NULL,
+  from_version INTEGER NOT NULL,
+  to_version INTEGER NOT NULL,
+  author TEXT NOT NULL,
+  _timestamp TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+);
+INSERT INTO version_history (component, from_version, to_version, author) VALUES ('ROOT', 0, 1, 'Initial Creation');
+
+
+CREATE OR REPLACE FUNCTION update_timestamp_column()
+RETURNS TRIGGER AS $$
+BEGIN
+  NEW._timestamp = now(); 
+  RETURN NEW;
+END;
+$$ language 'plpgsql';
+
+CREATE TABLE app_config(
+  appname TEXT PRIMARY KEY,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+-- }}}
+
+-- Twitch Auth {{{
+INSERT INTO version_history (component, from_version, to_version, author) VALUES ('TWITCH_AUTH', 0, 1, 'Initial Creation');
+
+-- Authorisation tokens allowing us to take actions on behalf of certain users or channels.
+-- For example, channels we have joined will need to be authorised with a 'channel:bot' scope.
+CREATE TABLE user_auth(
+  userid TEXT PRIMARY KEY,
+  token TEXT NOT NULL,
+  refresh_token TEXT NOT NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  _timestamp TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE TRIGGER user_auth_timestamp BEFORE UPDATE ON user_auth
+  FOR EACH ROW EXECUTE FUNCTION update_timestamp_column();
+
+CREATE TABLE user_auth_scopes(
+  userid TEXT NOT NULL REFERENCES user_auth(userid) ON DELETE CASCADE,
+  scope TEXT NOT NULL
+);
+
+-- Which joins will be joined at startup,
+-- and any configurable choices needed when joining the channel
+CREATE TABLE bot_channels(
+  userid TEXT PRIMARY KEY REFERENCES user_auth(userid) ON DELETE CASCADE,
+  autojoin BOOLEAN DEFAULT true,
+  joined_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  _timestamp TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE TRIGGER bot_channels_timestamp BEFORE UPDATE ON bot_channels
+  FOR EACH ROW EXECUTE FUNCTION update_timestamp_column();
+
+
+-- }}}
+
+
+
+-- vim: set fdm=marker:

example-config/bot.conf

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+[BOT]
+prefix = ?
+bot_id =
+
+ALSO_READ = config/secrets.conf
+
+wshost = localhost
+wsport = 4343
+wsdomain = localhost:4343
+
+[LOGGING]
+general_log = 
+warning_log =
+error_log =
+critical_log =

example-config/secrets.conf

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+[CROCBOT]
+client_id = 
+client_secret = 
+
+[DATA]
+args =
+appid =

requirements.txt

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+twitchio
+psycopg[pool]
+cachetools
+discord.py

scripts/start_bot.py

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+# !/bin/python3
+
+import sys
+import os
+
+sys.path.insert(0, os.path.join(os.getcwd()))
+sys.path.insert(0, os.path.join(os.getcwd(), "src"))
+
+
+if __name__ == '__main__':
+    from bot import _main
+    _main()

src/bot.py

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+import asyncio
+import logging
+import websockets
+
+from twitchio.web import AiohttpAdapter
+
+from meta import Bot, conf, setup_main_logger, args
+from data import Database
+
+from modules import twitch_setup
+
+logger = logging.getLogger(__name__)
+
+
+async def main():
+    db = Database(conf.data['args'])
+
+    async with db.open():
+        adapter = AiohttpAdapter(
+            host=conf.bot.get('wshost', None),
+            port=conf.bot.getint('wsport', None),
+            domain=conf.bot.get('wsdomain', None),
+            eventsub_secret=conf.bot.get('eventsub_secret', None)
+        )
+
+        bot = Bot(
+            config=conf,
+            dbconn=db,
+            adapter=adapter,
+            setup=twitch_setup,
+        )
+
+        try:
+            await bot.start()
+        finally:
+            await bot.close()
+
+
+def _main():
+    setup_main_logger()
+
+    asyncio.run(main())

src/botdata.py

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+from data import Registry, RowModel, Table
+from data.columns import String, Timestamp, Integer, Bool
+
+
+class UserAuth(RowModel):
+    """
+    Schema
+    ======
+    CREATE TABLE user_auth(
+      userid TEXT PRIMARY KEY,
+      token TEXT NOT NULL,
+      refresh_token TEXT NOT NULL,
+      created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+      _timestamp TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    );
+    """
+    _tablename_ = 'user_auth'
+    _cache_ = {}
+
+    userid = String(primary=True)
+    token = String()
+    refresh_token = String()
+    created_at = Timestamp()
+    _timestamp = Timestamp()
+
+
+class BotChannel(RowModel):
+    """
+    Schema
+    ======
+    CREATE TABLE bot_channels(
+      userid TEXT PRIMARY KEY REFERENCES user_auth(userid) ON DELETE CASCADE,
+      autojoin BOOLEAN DEFAULT true,
+      listen_redeems BOOLEAN,
+      joined_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+      _timestamp TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    );
+    """
+    _tablename_ = 'bot_channels'
+    _cache_ = {}
+
+    userid = String(primary=True)
+    autojoin = Bool()
+    listen_redeems = Bool()
+    joined_at = Timestamp()
+    _timestamp = Timestamp()
+
+
+class VersionHistory(RowModel):
+    """
+    CREATE TABLE version_history(
+        component TEXT NOT NULL,
+        from_version INTEGER NOT NULL,
+        to_version INTEGER NOT NULL,
+        author TEXT NOT NULL,
+        _timestamp TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    );
+    """
+    _tablename_ = 'version_history'
+    _cache_ = {}
+
+    component = String()
+    from_version = Integer()
+    to_version = Integer()
+    author = String()
+    _timestamp = Timestamp()
+
+
+class BotData(Registry):
+    version_history = VersionHistory.table
+
+    user_auth = UserAuth.table
+    bot_channels = BotChannel.table
+
+    """
+    CREATE TABLE user_auth_scopes(
+      userid TEXT NOT NULL REFERENCES user_auth(userid) ON DELETE CASCADE,
+      scope TEXT NOT NULL
+    );
+    """
+    user_auth_scopes = Table('user_auth_scopes')
+

src/constants.py

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+from twitchio import Scopes
+
+
+CONFIG_FILE = 'config/bot.conf'
+
+SCHEMA_VERSIONS = {
+    'ROOT': 1,
+    'TWITCH_AUTH': 1
+}
+
+# Requested scopes for the bots own twitch user
+BOTUSER_SCOPES = Scopes((
+    Scopes.user_read_chat,
+    Scopes.user_write_chat,
+    Scopes.user_bot,
+    Scopes.channel_bot,
+))
+
+# Default requested scopes for joining a channel
+CHANNEL_SCOPES = Scopes((
+    Scopes.channel_bot,
+))

src/meta/__init__.py

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+from .args import args
+from .bot import Bot
+from .config import Conf, conf
+from .logger import setup_main_logger, log_context, log_action_stack, log_app, set_logging_context, logging_context, with_log_ctx, persist_task

src/meta/args.py

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+import argparse
+
+from constants import CONFIG_FILE
+
+# ------------------------------
+# Parsed commandline arguments
+# ------------------------------
+parser = argparse.ArgumentParser()
+parser.add_argument(
+    '--conf',
+    dest='config',
+    default=CONFIG_FILE,
+    help="Path to configuration file."
+)
+parser.add_argument(
+    '--host',
+    dest='host',
+    default='127.0.0.1',
+    help="IP address to run the websocket server on."
+)
+parser.add_argument(
+    '--port',
+    dest='port',
+    default='5001',
+    help="Port to run the websocket server on."
+)
+
+args = parser.parse_args()

src/meta/bot.py

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+import logging
+from typing import Optional
+
+from twitchio.authentication import UserTokenPayload
+from twitchio.ext import commands
+from twitchio import Scopes, eventsub
+
+from data import Database, ORDER
+from botdata import BotData, UserAuth, BotChannel, VersionHistory
+from constants import BOTUSER_SCOPES, CHANNEL_SCOPES, SCHEMA_VERSIONS
+
+from .config import Conf
+
+
+logger = logging.getLogger(__name__)
+
+
+class Bot(commands.Bot):
+    def __init__(self, *args, config: Conf, dbconn: Database, setup=None, **kwargs):
+        kwargs.setdefault('client_id', config.bot['client_id'])
+        kwargs.setdefault('client_secret', config.bot['client_secret'])
+        kwargs.setdefault('bot_id', config.bot['bot_id'])
+        kwargs.setdefault('prefix', config.bot['prefix'])
+
+        super().__init__(*args, **kwargs)
+
+        if config.bot.get('eventsub_secret', None):
+            self.using_webhooks = True
+        else:
+            self.using_webhooks = False
+
+        self.config = config
+        self.dbconn = dbconn
+        self.data: BotData = dbconn.load_registry(BotData())
+        self._setup_hook = setup
+
+        self.joined: dict[str, BotChannel] = {}
+
+    async def event_ready(self):
+        # logger.info(f"Logged in as {self.nick}. User id is {self.user_id}")
+        logger.info("Logged in as %s", self.bot_id)
+
+    async def version_check(self, component: str, req_version: int):
+        # Query the database to confirm that the given component is listed with the given version.
+        # Typically done upon loading a component
+        rows = await VersionHistory.fetch_where(component=component).order_by('_timestamp', ORDER.DESC).limit(1)
+
+        version = rows[0].to_version if rows else 0
+
+        if version != req_version:
+            raise ValueError(f"Component {component} failed version check. Has version '{version}', required version '{req_version}'")
+        else:
+            logger.debug(
+                "Component %s passed version check with version %s",
+                component,
+                version
+            )
+        return True
+
+    async def setup_hook(self):
+        await self.data.init()
+        for component, req in SCHEMA_VERSIONS.items():
+            await self.version_check(component, req)
+
+        if self._setup_hook is not None:
+            await self._setup_hook(self)
+        
+        # Get all current bot channels 
+        channels = await BotChannel.fetch_where(autojoin=True)
+
+        # Join the channels
+        await self.join_channels(*channels)
+
+        # Build bot account's own url 
+        scopes = BOTUSER_SCOPES
+        url = self.get_auth_url(scopes)
+        logger.info("Bot account authorisation url: %s", url)
+
+        # Build everyone else's url
+        scopes = CHANNEL_SCOPES
+        url = self.get_auth_url(scopes)
+        logger.info("User account authorisation url: %s", url)
+
+        logger.info("Finished setup")
+
+    def get_auth_url(self, scopes: Optional[Scopes] = None):
+        if scopes is None:
+            scopes = Scopes((Scopes.channel_bot,))
+
+        url = self._adapter.get_authorization_url(scopes=scopes)
+        return url
+
+    async def join_channels(self, *channels: BotChannel):
+        """
+        Register webhook subscriptions to the given channel(s).
+        """
+        # TODO: If channels are already joined, unsubscribe
+        for channel in channels:
+            sub = None
+            try:
+                sub = eventsub.ChatMessageSubscription(
+                    broadcaster_user_id=channel.userid,
+                    user_id=self.bot_id,
+                )
+                if self.using_webhooks:
+                    resp = await self.subscribe_webhook(sub)
+                else:
+                    resp = await self.subscribe_websocket(sub)
+                logger.info("Subscribed to %s with %s response %s", channel.userid, sub, resp)
+                self.joined[channel.userid] = channel
+                self.safe_dispatch('channel_joined', payload=channel)
+            except Exception:
+                logger.exception("Failed to subscribe to %s with %s", channel.userid, sub)
+
+    async def event_oauth_authorized(self, payload: UserTokenPayload):
+        logger.debug("Oauth flow authorization with payload %s", repr(payload))
+        # Save the token and scopes and update internal authorisations
+        resp = await self.add_token(payload.access_token, payload.refresh_token)
+        if resp.user_id is None:
+            logger.warning(
+                "Oauth flow recieved with no user_id. Payload was: %s",
+                repr(payload)
+            )
+            return
+
+        # If the scopes authorised included channel:bot, ensure a BotChannel exists
+        # And join it if needed
+        if Scopes.channel_bot.value in resp.scopes:
+            bot_channel = await BotChannel.fetch_or_create(
+                resp.user_id,
+                autojoin=True,
+            )
+            if bot_channel.autojoin:
+                await self.join_channels(bot_channel)
+
+        logger.info("Oauth flow authorization complete for payload %s", repr(payload))
+
+    async def add_token(self, token: str, refresh: str):
+        # Update the tokens in internal cache
+        # This also validates the token
+        # And hopefully gets the userid and scopes
+        resp = await super().add_token(token, refresh)
+        if resp.user_id is None:
+            logger.warning(
+                "Added a token with no user_id. Response was: %s",
+                repr(resp)
+            )
+            return resp
+        userid = resp.user_id
+        new_scopes = resp.scopes
+
+        # Save the token and scopes to data
+        # Wrap this in a transaction so if it fails halfway we rollback correctly
+        async with self.dbconn.connection() as conn:
+            self.dbconn.conn = conn 
+            async with conn.transaction():
+                row = await UserAuth.fetch_or_create(userid, token=token, refresh_token=refresh)
+                if row.token != token or row.refresh_token != refresh:
+                    await row.update(token=token, refresh_token=refresh)
+                await self.data.user_auth_scopes.delete_where(userid=userid)
+                await self.data.user_auth_scopes.insert_many(
+                    ('userid', 'scope'),
+                    *((userid, scope) for scope in new_scopes)
+                )
+
+        logger.info("Updated auth token for user '%s' with scopes: %s", resp.user_id, ', '.join(new_scopes))
+        return resp
+
+    async def load_tokens(self, path: str | None = None):
+        for row in await UserAuth.fetch_where():
+            try:
+                await self.add_token(row.token, row.refresh_token)
+            except Exception:
+                logger.exception(f"Failed to add token for {row}")

src/meta/config.py

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+import configparser as cfgp
+
+from .args import args
+
+
+class MapDotProxy:
+    """
+    Allows dot access to an underlying Mappable object.
+    """
+    __slots__ = ("_map", "_converter")
+
+    def __init__(self, mappable, converter=None):
+        self._map = mappable
+        self._converter = converter
+
+    def __getattribute__(self, key):
+        _map = object.__getattribute__(self, '_map')
+        if key == '_map':
+            return _map
+        if key in _map:
+            _converter = object.__getattribute__(self, '_converter')
+            if _converter:
+                return _converter(_map[key])
+            else:
+                return _map[key]
+        else:
+            return object.__getattribute__(_map, key)
+
+    def __getitem__(self, key):
+        return self._map.__getitem__(key)
+
+
+class ConfigParser(cfgp.ConfigParser):
+    """
+    Extension of base ConfigParser allowing optional
+    section option retrieval without defaults.
+    """
+    def options(self, section, no_defaults=False, **kwargs):
+        if no_defaults:
+            try:
+                return list(self._sections[section].keys())
+            except KeyError:
+                raise cfgp.NoSectionError(section)
+        else:
+            return super().options(section, **kwargs)
+
+
+class Conf:
+    def __init__(self, configfile, section_name="DEFAULT"):
+        self.configfile = configfile
+
+        self.config = ConfigParser(
+            converters={
+                "intlist": self._getintlist,
+                "list": self._getlist,
+            }
+        )
+
+        with open(configfile) as conff:
+            # Opening with read_file mainly to ensure the file exists
+            self.config.read_file(conff)
+
+        self.section_name = section_name if section_name in self.config else 'DEFAULT'
+
+        self.default = self.config["DEFAULT"]
+        self.section = MapDotProxy(self.config[self.section_name])
+        self.bot = self.section
+
+        # Config file recursion, read in configuration files specified in every "ALSO_READ" key.
+        more_to_read = self.section.getlist("ALSO_READ", [])
+        read = set()
+        while more_to_read:
+            to_read = more_to_read.pop(0)
+            read.add(to_read)
+            self.config.read(to_read)
+            new_paths = [path for path in self.section.getlist("ALSO_READ", [])
+                         if path not in read and path not in more_to_read]
+            more_to_read.extend(new_paths)
+
+        global conf
+        conf = self
+
+    def __getitem__(self, key):
+        return self.section[key].strip()
+
+    def __getattr__(self, section):
+        name = section.upper()
+        return self.config[name]
+
+    def get(self, name, fallback=None):
+        result = self.section.get(name, fallback)
+        return result.strip() if result else result
+
+    def _getintlist(self, value):
+        return [int(item.strip()) for item in value.split(',')]
+
+    def _getlist(self, value):
+        return [item.strip() for item in value.split(',')]
+
+    def write(self):
+        with open(self.configfile, 'w') as conffile:
+            self.config.write(conffile)
+
+
+conf = Conf(args.config, 'BOT')

src/meta/logger.py

@@ -0,0 +1,466 @@
+import sys
+import logging
+import asyncio
+from typing import List, Optional
+from logging.handlers import QueueListener, QueueHandler
+import queue
+import multiprocessing
+from contextlib import contextmanager
+from io import StringIO
+from functools import wraps
+from contextvars import ContextVar
+
+import aiohttp
+
+from .config import conf
+from utils.ratelimits import Bucket, BucketOverFull, BucketFull
+
+
+log_logger = logging.getLogger(__name__)
+log_logger.propagate = False
+
+
+log_context: ContextVar[str] = ContextVar('logging_context', default='CTX: ROOT CONTEXT')
+log_action_stack: ContextVar[tuple[str, ...]] = ContextVar('logging_action_stack', default=())
+log_app: ContextVar[str] = ContextVar('logging_shard', default="CROCBOT")
+
+context: ContextVar[Optional[str]] = ContextVar('context', default=None)
+
+def set_logging_context(
+    context: Optional[str] = None,
+    action: Optional[str] = None,
+    stack: Optional[tuple[str, ...]] = None
+):
+    """
+    Statically set the logging context variables to the given values.
+
+    If `action` is given, pushes it onto the `log_action_stack`.
+    """
+    if context is not None:
+        log_context.set(context)
+    if action is not None or stack is not None:
+        astack = log_action_stack.get()
+        newstack = stack if stack is not None else astack
+        if action is not None:
+            newstack = (*newstack, action)
+        log_action_stack.set(newstack)
+
+
+@contextmanager
+def logging_context(context=None, action=None, stack=None):
+    """
+    Context manager for executing a block of code in a given logging context.
+
+    This context manager should only be used around synchronous code.
+    This is because async code *may* get cancelled or externally garbage collected,
+    in which case the finally block will be executed in the wrong context.
+    See https://github.com/python/cpython/issues/93740
+    This can be refactored nicely if this gets merged:
+        https://github.com/python/cpython/pull/99634
+
+    (It will not necessarily break on async code,
+     if the async code can be guaranteed to clean up in its own context.)
+    """
+    if context is not None:
+        oldcontext = log_context.get()
+        log_context.set(context)
+    if action is not None or stack is not None:
+        astack = log_action_stack.get()
+        newstack = stack if stack is not None else astack
+        if action is not None:
+            newstack = (*newstack, action)
+        log_action_stack.set(newstack)
+    try:
+        yield
+    finally:
+        if context is not None:
+            log_context.set(oldcontext)
+        if stack is not None or action is not None:
+            log_action_stack.set(astack)
+
+
+def with_log_ctx(isolate=True, **kwargs):
+    """
+    Execute a coroutine inside a given logging context.
+
+    If `isolate` is true, ensures that context does not leak
+    outside the coroutine.
+
+    If `isolate` is false, just statically set the context,
+    which will leak unless the coroutine is
+    called in an externally copied context.
+    """
+    def decorator(func):
+        @wraps(func)
+        async def wrapped(*w_args, **w_kwargs):
+            if isolate:
+                with logging_context(**kwargs):
+                    # Task creation will synchronously copy the context
+                    # This is gc safe
+                    name = kwargs.get('action', f"log-wrapped-{func.__name__}")
+                    task = asyncio.create_task(func(*w_args, **w_kwargs), name=name)
+                return await task
+            else:
+                # This will leak context changes
+                set_logging_context(**kwargs)
+                return await func(*w_args, **w_kwargs)
+        return wrapped
+    return decorator
+
+
+# For backwards compatibility
+log_wrap = with_log_ctx
+
+
+def persist_task(task_collection: set):
+    """
+    Coroutine decorator that ensures the coroutine is scheduled as a task
+    and added to the given task_collection for strong reference
+    when it is called.
+
+    This is just a hack to handle discord.py events potentially
+    being unexpectedly garbage collected.
+
+    Since this also implicitly schedules the coroutine as a task when it is called,
+    the coroutine will also be run inside an isolated context.
+    """
+    def decorator(coro):
+        @wraps(coro)
+        async def wrapped(*w_args, **w_kwargs):
+            name = f"persisted-{coro.__name__}"
+            task = asyncio.create_task(coro(*w_args, **w_kwargs), name=name)
+            task_collection.add(task)
+            task.add_done_callback(lambda f: task_collection.discard(f))
+            await task
+
+
+RESET_SEQ = "\033[0m"
+COLOR_SEQ = "\033[3%dm"
+BOLD_SEQ = "\033[1m"
+"]]]"
+BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
+
+
+def colour_escape(fmt: str) -> str:
+    cmap = {
+        '%(black)': COLOR_SEQ % BLACK,
+        '%(red)': COLOR_SEQ % RED,
+        '%(green)': COLOR_SEQ % GREEN,
+        '%(yellow)': COLOR_SEQ % YELLOW,
+        '%(blue)': COLOR_SEQ % BLUE,
+        '%(magenta)': COLOR_SEQ % MAGENTA,
+        '%(cyan)': COLOR_SEQ % CYAN,
+        '%(white)': COLOR_SEQ % WHITE,
+        '%(reset)': RESET_SEQ,
+        '%(bold)': BOLD_SEQ,
+    }
+    for key, value in cmap.items():
+        fmt = fmt.replace(key, value)
+    return fmt
+
+
+log_format = ('%(green)%(asctime)-19s%(reset)|%(red)%(levelname)-8s%(reset)|' +
+              '%(cyan)%(app)-15s%(reset)|' +
+              '%(cyan)%(context)-24s%(reset)|' +
+              '%(cyan)%(actionstr)-22s%(reset)|' +
+              ' %(bold)%(cyan)%(name)s:%(reset)' +
+              ' %(white)%(message)s%(ctxstr)s%(reset)')
+log_format = colour_escape(log_format)
+
+
+# Setup the logger
+logger = logging.getLogger()
+log_fmt = logging.Formatter(
+    fmt=log_format,
+    # datefmt='%Y-%m-%d %H:%M:%S'
+)
+logger.setLevel(logging.NOTSET)
+
+
+class LessThanFilter(logging.Filter):
+    def __init__(self, exclusive_maximum, name=""):
+        super(LessThanFilter, self).__init__(name)
+        self.max_level = exclusive_maximum
+
+    def filter(self, record):
+        # non-zero return means we log this message
+        return 1 if record.levelno < self.max_level else 0
+
+class ExactLevelFilter(logging.Filter):
+    def __init__(self, target_level, name=""):
+        super().__init__(name)
+        self.target_level = target_level
+
+    def filter(self, record):
+        return (record.levelno == self.target_level)
+
+
+class ThreadFilter(logging.Filter):
+    def __init__(self, thread_name):
+        super().__init__("")
+        self.thread = thread_name
+
+    def filter(self, record):
+        # non-zero return means we log this message
+        return 1 if record.threadName == self.thread else 0
+
+
+class ContextInjection(logging.Filter):
+    def filter(self, record):
+        # These guards are to allow override through _extra
+        # And to ensure the injection is idempotent
+        if not hasattr(record, 'context'):
+            record.context = log_context.get()
+
+        if not hasattr(record, 'actionstr'):
+            action_stack = log_action_stack.get()
+            if hasattr(record, 'action'):
+                action_stack = (*action_stack, record.action)
+            if action_stack:
+                record.actionstr = ' ➔ '.join(action_stack)
+            else:
+                record.actionstr = "Unknown Action"
+
+        if not hasattr(record, 'app'):
+            record.app = log_app.get()
+
+        if not hasattr(record, 'ctx'):
+            if ctx := context.get():
+                record.ctx = repr(ctx)
+            else:
+                record.ctx = None
+
+        if getattr(record, 'with_ctx', False) and record.ctx:
+            record.ctxstr = '\n' + record.ctx
+        else:
+            record.ctxstr = ""
+        return True
+
+
+logging_handler_out = logging.StreamHandler(sys.stdout)
+logging_handler_out.setLevel(logging.DEBUG)
+logging_handler_out.setFormatter(log_fmt)
+logging_handler_out.addFilter(ContextInjection())
+logger.addHandler(logging_handler_out)
+log_logger.addHandler(logging_handler_out)
+
+logging_handler_err = logging.StreamHandler(sys.stderr)
+logging_handler_err.setLevel(logging.WARNING)
+logging_handler_err.setFormatter(log_fmt)
+logging_handler_err.addFilter(ContextInjection())
+logger.addHandler(logging_handler_err)
+log_logger.addHandler(logging_handler_err)
+
+
+class LocalQueueHandler(QueueHandler):
+    def _emit(self, record: logging.LogRecord) -> None:
+        # Removed the call to self.prepare(), handle task cancellation
+        try:
+            self.enqueue(record)
+        except asyncio.CancelledError:
+            raise
+        except Exception:
+            self.handleError(record)
+
+
+class WebHookHandler(logging.StreamHandler):
+    def __init__(self, webhook_url, prefix="", batch=True, loop=None):
+        super().__init__()
+        self.webhook_url = webhook_url
+        self.prefix = prefix
+        self.batched = ""
+        self.batch = batch
+        self.loop = loop
+        self.batch_delay = 10
+        self.batch_task = None
+        self.last_batched = None
+        self.waiting = []
+
+        self.bucket = Bucket(20, 40)
+        self.ignored = 0
+
+        self.session = None
+        self.webhook = None
+
+    def get_loop(self):
+        if self.loop is None:
+            self.loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(self.loop)
+        return self.loop
+
+    def emit(self, record):
+        self.format(record)
+        self.get_loop().call_soon_threadsafe(self._post, record)
+
+    def _post(self, record):
+        if self.session is None:
+            self.setup()
+        asyncio.create_task(self.post(record))
+
+    def setup(self):
+        from discord import Webhook
+        self.session = aiohttp.ClientSession()
+        self.webhook = Webhook.from_url(self.webhook_url, session=self.session)
+
+    async def post(self, record):
+        if record.context == 'Webhook Logger':
+            # Don't livelog livelog errors
+            # Otherwise we recurse and Cloudflare hates us
+            return
+        log_context.set("Webhook Logger")
+        log_action_stack.set(("Logging",))
+        log_app.set(record.app)
+
+        try:
+            timestamp = utc_now().strftime("%d/%m/%Y, %H:%M:%S")
+            header = f"[{record.asctime}][{record.levelname}][{record.app}][{record.actionstr}] <{record.context}>"
+            context = f"\n# Context: {record.ctx}" if record.ctx else ""
+            message = f"{header}\n{record.msg}{context}"
+
+            if len(message) > 1900:
+                as_file = True
+            else:
+                as_file = False
+                message = "```md\n{}\n```".format(message)
+
+            # Post the log message(s)
+            if self.batch:
+                if len(message) > 1500:
+                    await self._send_batched_now()
+                    await self._send(message, as_file=as_file)
+                else:
+                    self.batched += message
+                    if len(self.batched) + len(message) > 1500:
+                        await self._send_batched_now()
+                    else:
+                        asyncio.create_task(self._schedule_batched())
+            else:
+                await self._send(message, as_file=as_file)
+        except Exception as ex:
+            print(f"Unexpected error occurred while logging to webhook: {repr(ex)}", file=sys.stderr)
+
+    async def _schedule_batched(self):
+        if self.batch_task is not None and not (self.batch_task.done() or self.batch_task.cancelled()):
+            # noop, don't reschedule if it is already scheduled
+            return
+        try:
+            self.batch_task = asyncio.create_task(asyncio.sleep(self.batch_delay))
+            await self.batch_task
+            await self._send_batched()
+        except asyncio.CancelledError:
+            return
+        except Exception as ex:
+            print(f"Unexpected error occurred while scheduling batched webhook log: {repr(ex)}", file=sys.stderr)
+
+    async def _send_batched_now(self):
+        if self.batch_task is not None and not self.batch_task.done():
+            self.batch_task.cancel()
+        self.last_batched = None
+        await self._send_batched()
+
+    async def _send_batched(self):
+        if self.batched:
+            batched = self.batched
+            self.batched = ""
+            await self._send(batched)
+
+    async def _send(self, message, as_file=False):
+        try:
+            self.bucket.request()
+        except BucketOverFull:
+            # Silently ignore
+            self.ignored += 1
+            return
+        except BucketFull:
+            logger.warning(
+                "Can't keep up! "
+                f"Ignoring records on live-logger {self.webhook.id}."
+            )
+            self.ignored += 1
+            return
+        else:
+            if self.ignored > 0:
+                logger.warning(
+                    "Can't keep up! "
+                    f"{self.ignored} live logging records on webhook {self.webhook.id} skipped, continuing."
+                )
+                self.ignored = 0
+
+        try:
+            if as_file or len(message) > 1900:
+                with StringIO(message) as fp:
+                    fp.seek(0)
+                    await self.webhook.send(
+                        f"{self.prefix}\n`{message.splitlines()[0]}`",
+                        file=File(fp, filename="logs.md"),
+                        username=log_app.get()
+                    )
+            else:
+                await self.webhook.send(self.prefix + '\n' + message, username=log_app.get())
+        except discord.HTTPException:
+            logger.exception(
+                "Live logger errored. Slowing down live logger."
+            )
+            self.bucket.fill()
+
+
+handlers = []
+if webhook := conf.logging['general_log']:
+    handler = WebHookHandler(webhook, batch=True)
+    handlers.append(handler)
+
+if webhook := conf.logging['warning_log']:
+    handler = WebHookHandler(webhook, prefix=conf.logging['warning_prefix'], batch=True)
+    handler.addFilter(ExactLevelFilter(logging.WARNING))
+    handler.setLevel(logging.WARNING)
+    handlers.append(handler)
+
+if webhook := conf.logging['error_log']:
+    handler = WebHookHandler(webhook, prefix=conf.logging['error_prefix'], batch=True)
+    handler.setLevel(logging.ERROR)
+    handlers.append(handler)
+
+if webhook := conf.logging['critical_log']:
+    handler = WebHookHandler(webhook, prefix=conf.logging['critical_prefix'], batch=False)
+    handler.setLevel(logging.CRITICAL)
+    handlers.append(handler)
+
+
+def make_queue_handler(queue):
+    qhandler = QueueHandler(queue)
+    qhandler.setLevel(logging.INFO)
+    qhandler.addFilter(ContextInjection())
+    return qhandler
+
+
+def setup_main_logger(multiprocess=False):
+    q = multiprocessing.Queue() if multiprocess else queue.SimpleQueue()
+    if handlers:
+        # First create a separate loop to run the handlers on
+        import threading
+
+        def run_loop(loop):
+            asyncio.set_event_loop(loop)
+            try:
+                loop.run_forever()
+            finally:
+                loop.run_until_complete(loop.shutdown_asyncgens())
+                loop.close()
+
+        loop = asyncio.new_event_loop()
+        loop_thread = threading.Thread(target=lambda: run_loop(loop))
+        loop_thread.daemon = True
+        loop_thread.start()
+
+        for handler in handlers:
+            handler.loop = loop
+
+        qhandler = make_queue_handler(q)
+        # qhandler.addFilter(ThreadFilter('MainThread'))
+        logger.addHandler(qhandler)
+
+        listener = QueueListener(
+            q, *handlers, respect_handler_level=True
+        )
+        listener.start()
+    return q

src/modules/__init__.py

@@ -0,0 +1,11 @@
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from meta import Bot
+
+
+async def twitch_setup(bot: 'Bot'):
+    # Import and run setup methods from each module 
+    # from . import module 
+    # await module.twitch_setup(bot)
+    pass

src/utils/lib.py

@@ -0,0 +1,88 @@
+import re
+import datetime as dt
+
+
+def strfdelta(delta: dt.timedelta, sec=False, minutes=True, short=False) -> str:
+    """
+    Convert a datetime.timedelta object into an easily readable duration string.
+
+    Parameters
+    ----------
+    delta: datetime.timedelta
+        The timedelta object to convert into a readable string.
+    sec: bool
+        Whether to include the seconds from the timedelta object in the string.
+    minutes: bool
+        Whether to include the minutes from the timedelta object in the string.
+    short: bool
+        Whether to abbreviate the units of time ("hour" to "h", "minute" to "m", "second" to "s").
+
+    Returns: str
+        A string containing a time from the datetime.timedelta object, in a readable format.
+        Time units will be abbreviated if short was set to True.
+    """
+    output = [[delta.days, 'd' if short else ' day'],
+              [delta.seconds // 3600, 'h' if short else ' hour']]
+    if minutes:
+        output.append([delta.seconds // 60 % 60, 'm' if short else ' minute'])
+    if sec:
+        output.append([delta.seconds % 60, 's' if short else ' second'])
+    for i in range(len(output)):
+        if output[i][0] != 1 and not short:
+            output[i][1] += 's'  # type: ignore
+    reply_msg = []
+    if output[0][0] != 0:
+        reply_msg.append("{}{} ".format(output[0][0], output[0][1]))
+    if output[0][0] != 0 or output[1][0] != 0 or len(output) == 2:
+        reply_msg.append("{}{} ".format(output[1][0], output[1][1]))
+    for i in range(2, len(output) - 1):
+        reply_msg.append("{}{} ".format(output[i][0], output[i][1]))
+    if not short and reply_msg:
+        reply_msg.append("and ")
+    reply_msg.append("{}{}".format(output[-1][0], output[-1][1]))
+    return "".join(reply_msg)
+
+def utc_now() -> dt.datetime:
+    """
+    Return the current timezone-aware utc timestamp.
+    """
+    return dt.datetime.utcnow().replace(tzinfo=dt.timezone.utc)
+
+def replace_multiple(format_string, mapping):
+    """
+    Subsistutes the keys from the format_dict with their corresponding values.
+
+    Substitution is non-chained, and done in a single pass via regex.
+    """
+    if not mapping:
+        raise ValueError("Empty mapping passed.")
+
+    keys = list(mapping.keys())
+    pattern = '|'.join(f"({key})" for key in keys)
+    string = re.sub(pattern, lambda match: str(mapping[keys[match.lastindex - 1]]), format_string)
+    return string
+
+
+def parse_dur(time_str):
+    """
+    Parses a user provided time duration string into a number of seconds.
+
+    Parameters
+    ----------
+    time_str: str
+        The time string to parse. String can include days, hours, minutes, and seconds.
+
+    Returns: int
+        The number of seconds the duration represents.
+    """
+    funcs = {'d': lambda x: x * 24 * 60 * 60,
+             'h': lambda x: x * 60 * 60,
+             'm': lambda x: x * 60,
+             's': lambda x: x}
+    time_str = time_str.strip(" ,")
+    found = re.findall(r'(\d+)\s?(\w+?)', time_str)
+    seconds = 0
+    for bit in found:
+        if bit[1] in funcs:
+            seconds += funcs[bit[1]](int(bit[0]))
+    return seconds

src/utils/ratelimits.py

@@ -0,0 +1,166 @@
+import asyncio
+import time
+import logging
+
+from cachetools import TTLCache
+
+logger = logging.getLogger()
+
+
+
+class BucketFull(Exception):
+    """
+    Throw when a requested Bucket is already full
+    """
+    pass
+
+
+class BucketOverFull(BucketFull):
+    """
+    Throw when a requested Bucket is overfull
+    """
+    pass
+
+
+class Bucket:
+    __slots__ = ('max_level', 'empty_time', 'leak_rate', '_level', '_last_checked', '_last_full', '_wait_lock')
+
+    def __init__(self, max_level, empty_time):
+        self.max_level = max_level
+        self.empty_time = empty_time
+        self.leak_rate = max_level / empty_time
+
+        self._level = 0
+        self._last_checked = time.monotonic()
+
+        self._last_full = False
+        self._wait_lock = asyncio.Lock()
+
+    @property
+    def full(self) -> bool:
+        """
+        Return whether the bucket is 'full',
+        that is, whether an immediate request against the bucket will raise `BucketFull`.
+        """
+        self._leak()
+        return self._level + 1 > self.max_level
+
+    @property
+    def overfull(self):
+        self._leak()
+        return self._level > self.max_level
+
+    @property
+    def delay(self):
+        self._leak()
+        if self._level + 1 > self.max_level:
+            delay = (self._level + 1 - self.max_level) * self.leak_rate
+        else:
+            delay = 0
+        return delay
+
+    def _leak(self):
+        if self._level:
+            elapsed = time.monotonic() - self._last_checked
+            self._level = max(0, self._level - (elapsed * self.leak_rate))
+
+        self._last_checked = time.monotonic()
+
+    def request(self):
+        self._leak()
+        if self._level > self.max_level:
+            raise BucketOverFull
+        elif self._level == self.max_level:
+            self._level += 1
+            if self._last_full:
+                raise BucketOverFull
+            else:
+                self._last_full = True
+                raise BucketFull
+        else:
+            self._last_full = False
+            self._level += 1
+
+    def fill(self):
+        self._leak()
+        self._level = max(self._level, self.max_level + 1)
+
+    async def wait(self):
+        """
+        Wait until the bucket has room.
+
+        Guarantees that a `request` directly afterwards will not raise `BucketFull`.
+        """
+        # Wrapped in a lock so that waiters are correctly handled in wait-order
+        # Otherwise multiple waiters will have the same delay,
+        # and race for the wakeup after sleep.
+        # Also avoids short-circuiting in the 0 delay case, which would not correctly handle wait-order
+        async with self._wait_lock:
+            # We do this in a loop in case asyncio.sleep throws us out early,
+            # or a synchronous request overflows the bucket while we are waiting.
+            while self.full:
+                await asyncio.sleep(self.delay)
+
+    async def wrapped(self, coro):
+        await self.wait()
+        self.request()
+        await coro
+
+
+class RateLimit:
+    def __init__(self, max_level, empty_time, error=None, cache=TTLCache(1000, 60 * 60)):
+        self.max_level = max_level
+        self.empty_time = empty_time
+
+        self.error = error or "Too many requests, please slow down!"
+        self.buckets = cache
+
+    def request_for(self, key):
+        if not (bucket := self.buckets.get(key, None)):
+            bucket = self.buckets[key] = Bucket(self.max_level, self.empty_time)
+
+        bucket.request()
+
+    def ward(self, member=True, key=None):
+        """
+        Command ratelimit decorator.
+        """
+        key = key or ((lambda ctx: (ctx.guild.id, ctx.author.id)) if member else (lambda ctx: ctx.author.id))
+
+        def decorator(func):
+            async def wrapper(ctx, *args, **kwargs):
+                self.request_for(key(ctx))
+                return await func(ctx, *args, **kwargs)
+            return wrapper
+        return decorator
+
+
+async def limit_concurrency(aws, limit):
+    """
+    Run provided awaitables concurrently,
+    ensuring that no more than `limit` are running at once.
+    """
+    aws = iter(aws)
+    aws_ended = False
+    pending = set()
+    count = 0
+    logger.debug("Starting limited concurrency executor")
+
+    while pending or not aws_ended:
+        while len(pending) < limit and not aws_ended:
+            aw = next(aws, None)
+            if aw is None:
+                aws_ended = True
+            else:
+                pending.add(asyncio.create_task(aw))
+                count += 1
+
+        if not pending:
+            break
+
+        done, pending = await asyncio.wait(
+            pending, return_when=asyncio.FIRST_COMPLETED
+        )
+        while done:
+            yield done.pop()
+    logger.debug(f"Completed {count} tasks")