RcGcDb/src/discord.py
2020-08-11 14:11:47 +02:00

175 lines
6.8 KiB
Python

import json, random, math, logging
from collections import defaultdict
from src.misc import logger
from src.config import settings
from src.database import db_cursor
from src.i18n import langs
from asyncio import TimeoutError
import aiohttp
logger = logging.getLogger("rcgcdb.discord")
# General functions
default_header = settings["header"]
default_header['Content-Type'] = 'application/json'
default_header["X-RateLimit-Precision"] = "millisecond"
# User facing webhook functions
async def wiki_removal(wiki_url, status):
for observer in db_cursor.execute('SELECT webhook, lang FROM rcgcdw WHERE wiki = ?', (wiki_url,)):
_ = langs[observer["lang"]]["discord"].gettext
reasons = {410: _("wiki deleted"), 404: _("wiki deleted"), 401: _("wiki inaccessible"),
402: _("wiki inaccessible"), 403: _("wiki inaccessible")}
reason = reasons.get(status, _("unknown error"))
await send_to_discord_webhook(DiscordMessage("compact", "webhook/remove", webhook_url=[], content=_("This recent changes webhook has been removed for `{reason}`!").format(reason=reason), wiki=None), webhook_url=observer["webhook"])
header = settings["header"]
header['Content-Type'] = 'application/json'
header['X-Audit-Log-Reason'] = "Wiki becoming unavailable"
async with aiohttp.ClientSession(headers=header, timeout=aiohttp.ClientTimeout(5.0)) as session:
await session.delete("https://discord.com/api/webhooks/"+observer["webhook"])
async def webhook_removal_monitor(webhook_url: str, reason: int):
await send_to_discord_webhook_monitoring(DiscordMessage("compact", "webhook/remove", None, content="The webhook {} has been removed due to {}.".format("https://discord.com/api/webhooks/" + webhook_url, reason), wiki=None))
class DiscordMessage:
"""A class defining a typical Discord JSON representation of webhook payload."""
def __init__(self, message_type: str, event_type: str, webhook_url: list, wiki, content=None):
self.webhook_object = dict(allowed_mentions={"parse": []})
self.webhook_url = webhook_url
self.wiki = wiki
if message_type == "embed":
self.__setup_embed()
elif message_type == "compact":
self.webhook_object["content"] = content
self.event_type = event_type
def __setitem__(self, key, value):
"""Set item is used only in embeds."""
try:
self.embed[key] = value
except NameError:
raise TypeError("Tried to assign a value when message type is plain message!")
def __getitem__(self, item):
return self.embed[item]
def __repr__(self):
"""Return the Discord webhook object ready to be sent"""
return json.dumps(self.webhook_object)
def __setup_embed(self):
self.embed = defaultdict(dict)
if "embeds" not in self.webhook_object:
self.webhook_object["embeds"] = [self.embed]
else:
self.webhook_object["embeds"].append(self.embed)
self.embed["color"] = None
def add_embed(self):
self.finish_embed()
self.__setup_embed()
def finish_embed(self):
if self.embed["color"] is None:
if settings["appearance"]["embed"].get(self.event_type, {"color": None})["color"] is None:
self.embed["color"] = random.randrange(1, 16777215)
else:
self.embed["color"] = settings["appearance"]["embed"][self.event_type]["color"]
else:
self.embed["color"] = math.floor(self.embed["color"])
def set_author(self, name, url, icon_url=""):
self.embed["author"]["name"] = name
self.embed["author"]["url"] = url
self.embed["author"]["icon_url"] = icon_url
def add_field(self, name, value, inline=False):
if "fields" not in self.embed:
self.embed["fields"] = []
self.embed["fields"].append(dict(name=name, value=value, inline=inline))
def set_avatar(self, url):
self.webhook_object["avatar_url"] = url
def set_name(self, name):
self.webhook_object["username"] = name
# Monitoring webhook functions
async def wiki_removal_monitor(wiki_url, status):
await send_to_discord_webhook_monitoring(DiscordMessage("compact", "webhook/remove", content="Removing {} because {}.".format(wiki_url, status), webhook_url=[None], wiki=None))
async def generic_msg_sender_exception_logger(exception: str, title: str, **kwargs):
"""Creates a Discord message reporting a crash"""
message = DiscordMessage("embed", "bot/exception", [None], wiki=None)
message["description"] = exception
message["title"] = title
for key, value in kwargs:
message.add_field(key, value)
message.finish_embed()
await send_to_discord_webhook_monitoring(message)
async def send_to_discord_webhook_monitoring(data: DiscordMessage):
header = settings["header"]
header['Content-Type'] = 'application/json'
async with aiohttp.ClientSession(headers=header, timeout=aiohttp.ClientTimeout(5.0)) as session:
try:
result = await session.post("https://discord.com/api/webhooks/"+settings["monitoring_webhook"], data=repr(data))
except (aiohttp.ClientConnectionError, aiohttp.ServerConnectionError):
logger.exception("Could not send the message to Discord")
return 3
async def send_to_discord_webhook(data: DiscordMessage, webhook_url: str) -> tuple:
"""Sends a message to webhook
:return tuple(status code for request, rate limit info (None for can send more, string for amount of seconds to wait)"""
async with aiohttp.ClientSession(headers=default_header, timeout=aiohttp.ClientTimeout(5.0)) as session:
try:
result = await session.post("https://discord.com/api/webhooks/"+webhook_url, data=repr(data))
rate_limit = None if int(result.headers.get('x-ratelimit-remaining', "-1")) > 0 else result.headers.get('x-ratelimit-reset-after', None)
except (aiohttp.ClientConnectionError, aiohttp.ServerConnectionError, TimeoutError):
logger.exception("Could not send the message to Discord")
return 3, None
status = await handle_discord_http(result.status, repr(data), result, webhook_url)
if status == 5:
return 5, await result.json()
else:
return status, rate_limit
async def handle_discord_http(code: int, formatted_embed: str, result: aiohttp.ClientResponse, webhook_url: str):
if 300 > code > 199: # message went through
return 0
elif code == 400: # HTTP BAD REQUEST result.status_code, data, result, header
logger.error(
"Following message has been rejected by Discord, please submit a bug on our bugtracker adding it:")
logger.error(formatted_embed)
logger.error(await result.text())
return 1
elif code == 401 or code == 404: # HTTP UNAUTHORIZED AND NOT FOUND
logger.error("Webhook URL is invalid or no longer in use, please replace it with proper one.")
db_cursor.execute("DELETE FROM rcgcdw WHERE webhook = ?", (webhook_url,))
await webhook_removal_monitor(webhook_url, code)
return 1
elif code == 429:
logger.error("We are sending too many requests to the Discord, slowing down...")
return 5
elif 499 < code < 600:
logger.error(
"Discord have trouble processing the event, and because the HTTP code returned is {} it means we blame them.".format(
code))
return 3
else:
return 4