560 lines
17 KiB
Python
560 lines
17 KiB
Python
import asyncio
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import json
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import logging
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import os
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import re
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import traceback
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import sys
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import uuid
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import aiofiles
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import aiofiles.os
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import aiohttp
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import discord
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import discord.ext.commands
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import nio
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def config_gen(config_file):
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config_dict = {
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"homeserver": "https://matrix.org",
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"username": "@name:matrix.org",
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"password": "my-secret-password",
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"token": "my-secret-token",
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"discord_prefix": "my-command-prefix",
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"bridge": {"channel_id": "room_id"}
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}
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if not os.path.exists(config_file):
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with open(config_file, "w") as f:
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json.dump(config_dict, f, indent=4)
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print(f"Example configuration dumped to {config_file}")
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sys.exit()
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with open(config_file, "r") as f:
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config = json.loads(f.read())
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return config
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config = config_gen("config.json")
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message_store = {}
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class MatrixClient(nio.AsyncClient):
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def __init__(self, discord_client, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.logger = logging.getLogger("matrix_logger")
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self.discord_client = discord_client
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self.ready = asyncio.Event()
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self.uploaded_emotes = {}
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async def start(self):
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password = config["password"]
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timeout = 30000
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self.logger.info(await self.login(password))
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self.logger.info("Doing initial sync.")
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await self.sync(timeout)
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# Set up event callbacks after syncing once to ignore old messages.
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callbacks = Callbacks(self.discord_client, self)
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self.logger.info("Adding callbacks.")
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self.add_event_callback(
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callbacks.message_callback,
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(nio.RoomMessageText, nio.RoomMessageMedia,
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nio.RoomMessageEmote)
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)
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self.add_event_callback(
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callbacks.redaction_callback, nio.RedactionEvent
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)
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self.add_ephemeral_callback(
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callbacks.typing_callback, nio.EphemeralEvent
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)
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await self.discord_client.ready.wait()
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self.ready.set()
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self.logger.info("Clients ready.")
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self.logger.info("Syncing forever.")
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await self.sync_forever(timeout=timeout)
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# Logout
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await self.logout()
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await self.close()
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async def upload_emote(self, emote_id):
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if emote_id in self.uploaded_emotes.keys():
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return self.uploaded_emotes[emote_id]
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emote_url = f"https://cdn.discordapp.com/emojis/{emote_id}"
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emote_file = f"/tmp/{str(uuid.uuid4())}"
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async with aiohttp.ClientSession() as session:
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async with session.get(emote_url) as resp:
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emote = await resp.read()
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content_type = resp.content_type
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async with aiofiles.open(emote_file, "wb") as f:
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await f.write(emote)
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async with aiofiles.open(emote_file, "rb") as f:
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resp, maybe_keys = await self.upload(
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f, content_type=content_type
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)
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await aiofiles.os.remove(emote_file)
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if type(resp) != nio.UploadResponse:
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self.logger.warning(
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f"Failed to upload emote {emote_id}"
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)
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return
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self.uploaded_emotes[emote_id] = resp.content_uri
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return resp.content_uri
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async def get_fmt_body(self, body, emotes):
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replace_ = [
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# Code blocks
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("```", "<pre><code>", "</code></pre>"),
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# Spoilers
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("||", "<span data-mx-spoiler>", "</span>"),
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# Strikethrough
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("~~", "<del>", "</del>")
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]
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for replace in replace_:
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for i in range(body.count(replace[0])):
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i += 1
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if i % 2:
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body = body.replace(replace[0], replace[1], 1)
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else:
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body = body.replace(replace[0], replace[2], 1)
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for emote in emotes.keys():
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emote_ = await self.upload_emote(emotes[emote])
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if emote_:
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emote = f":{emote}:"
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body = body.replace(
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emote, f"""<img alt=\"{emote}\" title=\"{emote}\" \
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height=\"32\" src=\"{emote_}\" data-mx-emoticon />"""
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)
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return body
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async def message_send(self, message, channel_id, emotes,
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reply_id=None, edit_id=None):
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room_id = config["bridge"][str(channel_id)]
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content = {
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"body": message,
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"format": "org.matrix.custom.html",
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"formatted_body": await self.get_fmt_body(message, emotes),
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"msgtype": "m.text"
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}
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if reply_id:
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reply_event = await self.room_get_event(
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room_id, reply_id
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)
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reply_event = reply_event.event
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content["m.relates_to"] = {"m.in_reply_to": {"event_id": reply_id}}
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content["formatted_body"] = f"""<mx-reply><blockquote>\
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<a href="https://matrix.to/#/{room_id}/{reply_id}">In reply to</a>\
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<a href="https://matrix.to/#/{reply_event.sender}">{reply_event.sender}</a>\
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<br>{reply_event.body}</blockquote></mx-reply>{content["formatted_body"]}"""
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if edit_id:
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content["body"] = f" * {content['body']}"
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content["m.relates_to"] = {
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"event_id": edit_id, "rel_type": "m.replace"
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}
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content["m.new_content"] = {
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"body": content["body"],
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"formatted_body": content["formatted_body"],
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"format": content["format"],
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"msgtype": content["msgtype"]
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}
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message = await self.room_send(
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room_id=room_id,
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message_type="m.room.message",
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content=content
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)
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return message.event_id
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async def message_redact(self, message, channel_id):
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await self.room_redact(
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room_id=config["bridge"][str(channel_id)],
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event_id=message
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)
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async def webhook_send(self, author, avatar, message,
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event_id, channel_id, embed=None):
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channel = self.discord_client.channel_store[channel_id]
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hook_name = "matrix_bridge"
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hooks = await channel.webhooks()
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# Create webhook if it doesn't exist.
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hook = discord.utils.get(hooks, name=hook_name)
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if not hook:
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hook = await channel.create_webhook(name=hook_name)
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# Username must be between 1 and 80 characters in length,
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# 'wait=True' allows us to store the sent message.
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try:
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hook = await hook.send(
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username=author[:80], avatar_url=avatar,
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content=message, embed=embed, wait=True
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)
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message_store[event_id] = hook
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message_store[hook.id] = event_id
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except discord.errors.HTTPException as e:
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self.logger.warning(f"Failed to send message {event_id}: {e}")
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class DiscordClient(discord.ext.commands.Bot):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.channel_store = {}
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self.ready = asyncio.Event()
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self.add_cogs()
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self.matrix_client = MatrixClient(
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self, config["homeserver"], config["username"]
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)
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self.bg_task = self.loop.create_task(
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self.log_exceptions(self.matrix_client)
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)
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def add_cogs(self):
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cogs_dir = "./cogs"
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if not os.path.isdir(cogs_dir):
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return
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for cog in os.listdir(cogs_dir):
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if cog.endswith(".py"):
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cog = f"cogs.{cog[:-3]}"
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self.load_extension(cog)
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async def to_return(self, channel_id, user):
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await self.matrix_client.ready.wait()
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if user.discriminator == "0000" \
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or str(channel_id) not in config["bridge"].keys():
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return True
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async def log_exceptions(self, matrix_client):
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try:
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return await matrix_client.start()
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except Exception:
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matrix_client.logger.warning(
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f"Unknown exception occurred\n{traceback.format_exc()}"
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)
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await matrix_client.close()
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async def on_ready(self):
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for channel in config["bridge"].keys():
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self.channel_store[channel] = self.get_channel(int(channel))
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self.ready.set()
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async def on_message(self, message):
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# Process other stuff like cogs before ignoring the message.
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await self.process_commands(message)
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if await self.to_return(message.channel.id, message.author):
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return
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content = await self.process_message(message)
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matrix_message = await self.matrix_client.message_send(
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content[0], message.channel.id,
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reply_id=content[1], emotes=content[2]
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)
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message_store[message.id] = matrix_message
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async def on_message_edit(self, before, after):
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if await self.to_return(after.channel.id, after.author):
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return
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content = await self.process_message(after)
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# Edit message only if it can be looked up in the cache.
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if before.id in message_store:
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await self.matrix_client.message_send(
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content[0], after.channel.id,
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edit_id=message_store[before.id], emotes=content[2]
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)
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async def on_message_delete(self, message):
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# Delete message only if it can be looked up in the cache.
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if message.id in message_store:
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await self.matrix_client.message_redact(
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message_store[message.id], message.channel.id
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)
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async def on_typing(self, channel, user, when):
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if await self.to_return(channel.id, user) or user == self.user:
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return
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# Send typing event
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await self.matrix_client.room_typing(
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config["bridge"][str(channel.id)], timeout=0
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)
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async def process_message(self, message):
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content = message.clean_content
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regex = r"<a?:(\w+):(\d+)>"
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emotes = {}
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# Store all emotes in a dict to upload and insert into formatted body.
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# { "emote_name": "emote_id" }
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for emote in re.findall(regex, content):
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emotes[emote[0]] = emote[1]
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# Get message reference for replies.
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replied_event = None
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if message.reference:
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replied_message = await message.channel.fetch_message(
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message.reference.message_id
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)
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# Try to get the corresponding event from the message cache.
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try:
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replied_event = message_store[replied_message.id]
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except KeyError:
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pass
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# Replace emote IDs with names.
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content = re.sub(regex, r":\g<1>:", content)
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# Escape stuff
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for replace in ("<", ">"):
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content = content.replace(replace, f"\\{replace}")
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# Append attachments to message.
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for attachment in message.attachments:
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content += f"\n{attachment.url}"
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content = f"[{message.author.display_name}] {content}"
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return content, replied_event, emotes
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class Callbacks(object):
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def __init__(self, discord_client, matrix_client):
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self.discord_client = discord_client
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self.matrix_client = matrix_client
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def get_channel(self, room):
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channel_id = next(
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(channel_id for channel_id, room_id in config["bridge"].items()
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if room_id == room.room_id), None
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)
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return channel_id
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def to_return(self, room, event):
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if room.room_id not in config["bridge"].values() or \
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event.sender == self.matrix_client.user:
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return True
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async def message_callback(self, room, event):
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message = event.body
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# Ignore messages having an empty body.
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if self.to_return(room, event) or not message:
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return
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content_dict = event.source.get("content")
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# Get the corresponding Discord channel.
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channel_id = self.get_channel(room)
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author = room.user_name(event.sender)
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avatar = None
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homeserver = event.sender.split(":")[-1]
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url = "https://matrix.org/_matrix/media/r0/download"
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try:
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if content_dict["m.relates_to"]["rel_type"] == "m.replace":
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# Get the original message's event ID.
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edited_event = content_dict["m.relates_to"]["event_id"]
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edited_content = await self.process_message(
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content_dict["m.new_content"]["body"], channel_id
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)
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# Get the corresponding Discord message.
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webhook_message = message_store[edited_event]
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try:
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await webhook_message.edit(content=edited_content)
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# Handle exception if edited message was deleted on Discord.
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except (
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discord.errors.NotFound, discord.errors.HTTPException
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) as e:
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self.matrix_client.logger.warning(
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f"Failed to edit message {edited_event}: {e}"
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)
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return
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except KeyError:
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pass
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try:
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if content_dict["m.relates_to"]["m.in_reply_to"]["event_id"] in \
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message_store.values():
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# Remove the first occurance of our bot's username if replying.
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# > <@discordbridge:something.org> [discord user]
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message = message.replace(f"<{config['username']}>", "", 1)
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except KeyError:
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pass
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# _testuser waves_ (Italics)
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if content_dict["msgtype"] == "m.emote":
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message = f"_{author} {message}_"
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message = await self.process_message(message, channel_id)
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embed = None
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# Get attachments.
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try:
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attachment = event.url.split("/")[-1]
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# TODO: Fix URL for attachments forwarded from other rooms.
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attachment = f"{url}/{homeserver}/{attachment}"
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embed = discord.Embed(colour=discord.Colour.blue(), title=message)
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embed.set_image(url=attachment)
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# Send attachment URL in message along with embed,
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# Just in-case the attachment is not an image.
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message = attachment
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except AttributeError:
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pass
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# Get avatar.
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for user in room.users.values():
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if user.user_id == event.sender:
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if user.avatar_url:
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avatar = user.avatar_url.split("/")[-1]
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avatar = f"{url}/{homeserver}/{avatar}"
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break
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await self.matrix_client.webhook_send(
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author, avatar, message, event.event_id, channel_id, embed=embed
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)
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async def redaction_callback(self, room, event):
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if self.to_return(room, event):
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return
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# Try to fetch the message from cache.
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try:
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message = message_store[event.redacts]
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await message.delete()
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# Handle exception if message was already deleted on Discord.
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except discord.errors.NotFound as e:
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self.matrix_client.logger.warning(
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f"Failed to delete message {event.event_id}: {e}"
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)
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except KeyError:
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pass
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async def typing_callback(self, room, event):
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if not room.typing_users \
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or room.room_id not in config["bridge"].values():
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return
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# Return if the event is sent by our bot.
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if len(room.typing_users) == 1 and \
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self.matrix_client.user in room.typing_users:
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return
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# Get the corresponding Discord channel.
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channel_id = self.get_channel(room)
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# Send typing event.
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async with self.discord_client.channel_store[channel_id].typing():
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return
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async def process_message(self, message, channel_id):
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mentions = re.findall(r"(^|\s)(@(\w*))", message)
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emotes = re.findall(r":(\w*):", message)
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# Get the guild from channel ID.
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guild = self.discord_client.channel_store[channel_id].guild
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added_emotes = []
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for emote in emotes:
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# Don't replace emote names with IDs multiple times.
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# :emote: becomes <:emote:emote_id>
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if emote not in added_emotes:
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added_emotes.append(emote)
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emote_ = discord.utils.get(guild.emojis, name=emote)
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if emote_:
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message = message.replace(f":{emote}:", str(emote_))
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# mentions = [('', '@name', 'name'), (' ', '@', '')]
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for mention in mentions:
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# Don't fetch member if mention is empty.
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# Single "@" without any name.
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if mention[2]:
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member = await guild.query_members(query=mention[2])
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if member:
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# Get first result.
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message = message.replace(mention[1], member[0].mention)
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return message
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def main():
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logging.basicConfig(level=logging.INFO)
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# Disable everyone and role mentions.
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allowed_mentions = discord.AllowedMentions(everyone=False, roles=False)
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# Set command prefix for Discord bot.
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command_prefix = config["discord_prefix"]
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# Intents to fetch members from guild.
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|
intents = discord.Intents.default()
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|
intents.members = True
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|
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# Start Discord bot.
|
|
DiscordClient(
|
|
allowed_mentions=allowed_mentions,
|
|
command_prefix=command_prefix, intents=intents
|
|
).run(config["token"])
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|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|