Divent/divent/bot.py

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Python
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import json
import logging
from datetime import datetime, timedelta
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from functools import wraps
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from os import getenv, path
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from typing import Dict, Optional
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from disnake import Client, Guild
from dotenv import load_dotenv
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from ics import Calendar, ContentLine, Event
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from ics.alarm import DisplayAlarm
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from oauthlib.oauth2 import TokenExpiredError
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from quart import Quart, redirect, render_template, request, session, url_for
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from requests_oauthlib import OAuth2Session # type: ignore
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from uvicorn.middleware.proxy_headers import ProxyHeadersMiddleware # type: ignore
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load_dotenv()
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DISCORD_TOKEN = getenv("DISCORD_TOKEN")
OAUTH2_CLIENT_ID = getenv("OAUTH2_CLIENT_ID")
OAUTH2_CLIENT_SECRET = getenv("OAUTH2_CLIENT_SECRET")
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if not DISCORD_TOKEN:
raise Exception("Missing DISCORD_TOKEN")
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if not OAUTH2_CLIENT_ID:
raise Exception("Missing OAUTH2_CLIENT_ID")
if not OAUTH2_CLIENT_SECRET:
raise Exception("Missing OAUTH2_CLIENT_SECRET")
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QUART_DEBUG = getenv("QUART_DEBUG", False)
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if QUART_DEBUG:
logging.basicConfig(level=logging.DEBUG)
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API_BASE_URL = getenv("API_BASE_URL", "https://discordapp.com/api")
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AUTHORIZATION_BASE_URL = f"{API_BASE_URL}/oauth2/authorize"
TOKEN_URL = f"{API_BASE_URL}/oauth2/token"
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class Discord(Client):
async def on_ready(self):
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print(f"Logged on as {self.user}!", flush=True)
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client = Discord()
app = Quart(__name__)
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app.config["SECRET_KEY"] = OAUTH2_CLIENT_SECRET
app.asgi_app = ProxyHeadersMiddleware(app.asgi_app, "*") # type: ignore
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def get_guild_by_id(guild_id: str) -> Optional[Guild]:
if guild_id:
for guild in client.guilds:
if str(guild.id) == guild_id or guild.vanity_url_code == guild_id:
return guild
return None
CATALOG_CACHE = {}
@app.errorhandler(500)
async def errorhandler(error: Exception):
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print(f"\33[31m{error}\33[m", flush=True)
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return await render_template("error.html.j2", error=str(error)), 500
@app.errorhandler(404)
async def not_found(error: Exception):
return await render_template("error.html.j2", error=str(error)), 404
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def token_updater(token: str):
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session["oauth2_token"] = token
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def make_session(
token: Optional[Dict[str, str]] = None, state: Optional[str] = None
) -> OAuth2Session:
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return OAuth2Session(
client_id=OAUTH2_CLIENT_ID,
token=token,
state=state,
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scope=["identify", "guilds"],
redirect_uri=f"{request.host_url}callback",
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auto_refresh_kwargs={
"client_id": OAUTH2_CLIENT_ID,
"client_secret": OAUTH2_CLIENT_SECRET,
},
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auto_refresh_url=TOKEN_URL,
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token_updater=token_updater,
)
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def i18n(str: str) -> str:
lang = request.accept_languages.best_match(["en", "fr"])
if lang not in CATALOG_CACHE:
catalog_file = f"{path.dirname(__file__)}/translations/{lang}.json"
if path.exists(catalog_file):
with open(catalog_file) as catalog_json:
catalog = json.load(catalog_json)
CATALOG_CACHE[lang] = catalog
if lang in CATALOG_CACHE and str in CATALOG_CACHE[lang]:
return CATALOG_CACHE[lang][str]
return str
def days_before_failure() -> int:
nextYear = datetime.today().year + 5 - ((datetime.today().year + 5) % 5)
nextDate = datetime(year=nextYear, month=6, day=3)
nextDelta = nextDate - datetime.now()
return nextDelta.days
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def cdn_avatar_url(user_id: int, hash: str) -> str:
ext = "gif" if hash.startswith("a_") else "png"
return f"https://cdn.discordapp.com/avatars/{user_id}/{hash}.{ext}"
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@app.context_processor
def context_processor():
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return dict(
_=i18n,
client=client,
cdn_avatar_url=cdn_avatar_url,
days_before_failure=days_before_failure(),
)
def login_required(fn):
@wraps(fn)
async def wrapper(*args, **kwargs):
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if session.get("oauth2_token"):
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return await fn(*args, **kwargs)
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session["redirect_url"] = request.path
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return redirect(url_for(".login"))
return wrapper
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@app.route("/")
async def index():
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return await render_template("index.html.j2")
@app.route("/login")
async def login():
discord = make_session()
authorization_url, state = discord.authorization_url(AUTHORIZATION_BASE_URL)
session["oauth2_state"] = state
return redirect(authorization_url)
@app.route("/callback")
async def callback():
request_values = await request.values
if request_values.get("error"):
return errorhandler(request_values.get("error"))
discord = make_session(state=session.get("oauth2_state"))
token = discord.fetch_token(
TOKEN_URL,
client_secret=OAUTH2_CLIENT_SECRET,
authorization_response=request.url,
)
token_updater(token)
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return redirect(session.pop("redirect_url", url_for(".guilds")))
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@app.route("/guilds")
@login_required
async def guilds():
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guild = get_guild_by_id(request.args.get("guild"))
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if guild:
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return redirect(
url_for(".subscribe", guild_id=guild.vanity_url_code or guild.id)
)
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try:
discord = make_session(token=session.get("oauth2_token"))
user = discord.get(f"{API_BASE_URL}/users/@me").json()
user_guilds = discord.get(f"{API_BASE_URL}/users/@me/guilds").json()
except TokenExpiredError:
return redirect(url_for(".login"))
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common_guilds = []
for bot_guild in client.guilds:
for user_guild in user_guilds:
if str(bot_guild.id) == user_guild["id"]:
common_guilds.append(bot_guild)
return await render_template(
"guilds.html.j2", user=user, common_guilds=common_guilds
)
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@app.route("/subscribe/<guild_id>")
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@login_required
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async def subscribe(guild_id: str):
guild = get_guild_by_id(guild_id)
if guild is None:
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return redirect(url_for(".login"))
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try:
discord = make_session(token=session.get("oauth2_token"))
user_guilds = discord.get(f"{API_BASE_URL}/users/@me/guilds").json()
except TokenExpiredError:
return redirect(url_for(".login"))
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if not any(str(guild.id) == user_guild["id"] for user_guild in user_guilds):
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return redirect(url_for(".login"))
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return await render_template("subscribe.html.j2", guild=guild)
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@app.route("/<guild_id>.ics")
async def ical(guild_id: str):
guild = get_guild_by_id(guild_id)
if guild is None:
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return redirect(url_for(".login"))
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calendar = Calendar()
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calendar.extra.append(ContentLine(name="REFRESH-INTERVAL", value="PT1H"))
calendar.extra.append(ContentLine(name="X-PUBLISHED-TTL", value="PT1H"))
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calendar.extra.append(ContentLine(name="NAME", value=guild.name))
calendar.extra.append(ContentLine(name="X-WR-CALNAME", value=guild.name))
if guild.description:
calendar.extra.append(ContentLine(name="DESCRIPTION", value=guild.description))
calendar.extra.append(ContentLine(name="X-WR-CALDESC", value=guild.description))
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for scheduled_event in guild.scheduled_events:
event = Event()
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event.summary = scheduled_event.name
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event.begin = scheduled_event.scheduled_start_time
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event.end = scheduled_event.scheduled_end_time
event.duration = timedelta(hours=2)
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event.uid = str(scheduled_event.id)
event.description = scheduled_event.description
event.url = f"https://discord.com/events/{guild_id}/{scheduled_event.id}"
event.location = (
scheduled_event.entity_metadata.location
if scheduled_event.entity_metadata
else None
)
alarm = DisplayAlarm()
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alarm.trigger = timedelta(hours=-1)
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event.alarms.append(alarm)
calendar.events.append(event)
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return calendar.serialize()
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def __main__():
quart_task = client.loop.create_task(app.run_task("0.0.0.0"))
quart_task.add_done_callback(lambda f: client.loop.stop())
client.run(DISCORD_TOKEN)