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226 lines
8.4 KiB
226 lines
8.4 KiB
import asyncio
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import importlib
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import json
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import os
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import signal
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import sys
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import time
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import traceback
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from pathlib import Path
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from typing import Any, Iterable, Optional
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import irc.client
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import irc.client_aio
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from apscheduler.schedulers.asyncio import AsyncIOScheduler
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from irc.client import Connection, Event, NickMask
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from edmond.log import Logger
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from edmond.plugin import Plugin
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class Bot(irc.client_aio.AioSimpleIRCClient, Logger):
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"""Main class for the IRC bot: handles connection and manages plugins."""
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CHANNELS_RUNTIME_KEY = "_channels"
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def __init__(self, config: dict, logger):
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super().__init__()
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self.config: dict = config
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self.logger = logger
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self.plugins: list[Plugin] = []
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self.values: dict[str, Any] = {}
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self.storage: dict[str, Any] = self.get_storage()
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self.tasks: list[asyncio.Task] = []
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self.done: bool = False
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self.scheduler = AsyncIOScheduler()
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self.scheduler.start()
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@property
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def nick(self) -> str:
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"""Nickname validated by the server, or the configured nick."""
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if self.connection.is_connected():
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return self.connection.get_nickname()
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return self.config["nick"]
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@property
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def names(self) -> Iterable[str]:
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"""Collection of names the bot should identify with."""
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return (self.nick, *self.config["alternative_nicks"])
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@property
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def channels(self) -> list[str]:
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"""List of joined channels."""
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if self.CHANNELS_RUNTIME_KEY not in self.values:
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self.values[self.CHANNELS_RUNTIME_KEY] = []
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return self.values[self.CHANNELS_RUNTIME_KEY]
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def get_storage(self) -> dict:
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"""Load data from storage."""
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try:
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with open(self.config["storage_file"], "rt") as storage_file:
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storage = json.load(storage_file)
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self.log_d("Loaded storage file.")
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return storage
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except (OSError, json.decoder.JSONDecodeError) as exc:
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self.log_e(f"Could not load storage file: {exc}")
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self.log_w(
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"If it's not the first time Edm0nd is run, you may lose"
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" data when closing the program."
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)
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return {}
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def save_storage(self) -> None:
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"""Save storage data to disk."""
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try:
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with open(self.config["storage_file"], "wt") as storage_file:
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json.dump(self.storage, storage_file, indent=2, sort_keys=True)
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self.log_d("Saved storage file.")
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except OSError as exc:
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self.log_e(f"Could not save storage file: {exc}")
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def handle_task(self, coro):
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"""Schedule a task in the event loop. Keep a reference to cancel it."""
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task = self.connection.reactor.loop.create_task(coro)
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self.tasks.append(task)
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def on_welcome(self, connection: Connection, event: Event):
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"""Handle a successful connection to a server."""
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self.log_i(f"Connected to server {event.source}.")
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self.run_plugin_callbacks(event)
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for channel in self.config["channels"]:
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connection.join(channel)
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def on_join(self, connection: Connection, event: Event):
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"""Handle someone, possibly the bot, joining a channel."""
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if event.source.nick == self.nick:
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self.log_i(f"Joined {event.target}.")
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self.channels.append(event.target)
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self.run_plugin_callbacks(event)
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def on_part(self, connection: Connection, event: Event):
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"""Handle someone, possibly the bot, leaving a channel."""
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if event.source.nick == self.nick:
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self.log_i(f"Left {event.target} (args: {event.arguments[0]}).")
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self.channels.remove(event.target)
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self.run_plugin_callbacks(event)
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def on_pubmsg(self, connection: Connection, event: Event):
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"""Handle a message received in a channel."""
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channel = event.target
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nick = NickMask(event.source).nick
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message = event.arguments[0]
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self.log_d(f"Message in {channel} from {nick}: {message}")
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self.run_plugin_callbacks(event)
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def on_privmsg(self, connection: Connection, event: Event):
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"""Handle a message received privately, usually like a channel msg."""
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nick = NickMask(event.source).nick
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target = event.target
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message = event.arguments[0]
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self.log_d(f"Private message from {nick} to {target}: {message}")
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self.run_plugin_callbacks(event)
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def on_ping(self, connection: Connection, event: Event):
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"""Handle a ping; can be used as a random event timer."""
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self.log_d(f"Received ping from {event.target}.")
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self.run_plugin_callbacks(event)
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def run(self):
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"""Connect the bot to server, join channels and start responding."""
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self.log_i("Starting Edmond.")
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self.load_plugins()
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self.log_i("Connecting to server…")
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signal.signal(signal.SIGTERM, self.handle_sigterm)
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try:
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self.connect(self.config["host"], self.config["port"], self.nick)
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self.start()
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except irc.client.ServerConnectionError as exc:
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self.log_c(f"Connection failed: {exc}")
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except KeyboardInterrupt:
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self.log_i("Caught keyboard interrupt.")
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except Exception as exc:
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self.log_c(f"Caught unhandled {type(exc).__name__}: {exc}")
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_, _, exc_traceback = sys.exc_info()
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for line in traceback.format_tb(exc_traceback):
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self.log_d(line.rstrip())
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finally:
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self.cleanup()
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def load_plugins(self):
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"""Load all installed plugins."""
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self.log_i("Loading plugins…")
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plugin_files = os.listdir(Path(__file__).parent / "plugins")
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plugin_names = map(
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lambda f: os.path.splitext(f)[0],
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filter(
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lambda f: f.endswith(".py") and f != "__init__.py",
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plugin_files,
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),
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)
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for plugin_name in plugin_names:
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module = importlib.import_module(f"edmond.plugins.{plugin_name}")
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# Get plugin class name from its module name.
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class_name = (
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"".join(map(lambda w: w.capitalize(), plugin_name.split("_")))
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+ "Plugin"
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)
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plugin_class = getattr(module, class_name)
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self.plugins.append(plugin_class(self))
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self.values[plugin_name] = {}
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self.log_d(f"Loaded {class_name}.")
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def get_plugin(self, name: str) -> Optional[Plugin]:
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"""Get a loaded plugin by its name (e.g. 'mood'), or None."""
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matching_plugins = filter(
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lambda plugin: plugin.name == name,
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self.plugins,
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)
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return next(matching_plugins, None)
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def say(self, target: str, message: str) -> None:
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"""Send message to target after a slight delay."""
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message = message.replace("\n", " ").replace("\r", " ")
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time.sleep(self.config["speak_delay"])
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self.log_d(f"Sending to {target}: {message}")
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try:
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if message.startswith("/me "):
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self.connection.action(target, message[4:])
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else:
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self.connection.privmsg(target, message)
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except irc.client.MessageTooLong:
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self.log_e("Could not send, message is too long.")
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def run_plugin_callbacks(self, event: Event) -> None:
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"""Run appropriate callbacks for each plugin."""
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etype = event.type
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ready_plugins = filter(lambda p: p.is_ready, self.plugins)
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plugins = sorted(ready_plugins, key=lambda p: p.priority, reverse=True)
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for plugin in plugins:
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callbacks = plugin.callbacks
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if etype not in callbacks:
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continue
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if callbacks[etype](event):
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break
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def handle_sigterm(self, *args):
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"""Handle SIGTERM (keyboard interrupt, systemd stop, etc)."""
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self.cleanup()
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exit("Exiting after received SIGTERM.")
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def cleanup(self) -> None:
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"""Save the storage file and close the connection. Run only once."""
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if self.done:
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return
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self.log_i("Stopping Edmond.")
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self.save_storage() # FIRST THINGS FIRST
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for task in self.tasks:
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if not task.cancelled():
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self.log_d(f"Cancelling task {task.get_name()}…")
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task.cancel()
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if self.connection.is_connected():
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self.connection.close()
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self.reactor.loop.close()
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self.done = True
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