527 lines
19 KiB
Python
527 lines
19 KiB
Python
from __future__ import annotations
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import logging
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import re
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from diskcache import Cache
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from nio.client import AsyncClient
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from nio.events import (
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InviteMemberEvent,
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KeyVerificationCancel,
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KeyVerificationKey,
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KeyVerificationMac,
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KeyVerificationStart,
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MegolmEvent,
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ReactionEvent,
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RedactionEvent,
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RoomMessageText,
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RoomMessageUnknown,
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)
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from nio.exceptions import LocalProtocolError, SendRetryError
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from nio.responses import JoinError, RoomGetEventError, RoomSendError, ToDeviceError
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from nio.rooms import MatrixRoom
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import matrix_alertbot.matrix
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from matrix_alertbot.alertmanager import AlertmanagerClient
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from matrix_alertbot.chat_functions import strip_fallback
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from matrix_alertbot.command import (
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AckAlertCommand,
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AngryUserCommand,
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CommandFactory,
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UnackAlertCommand,
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)
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from matrix_alertbot.config import Config
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logger = logging.getLogger(__name__)
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class Callbacks:
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def __init__(
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self,
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matrix_client: AsyncClient,
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alertmanager_client: AlertmanagerClient,
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cache: Cache,
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config: Config,
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matrix_client_pool: matrix_alertbot.matrix.MatrixClientPool,
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):
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"""
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Args:
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client: nio client used to interact with matrix.
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cache: Bot cache.
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alertmanager: Client used to interact with alertmanager.
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config: Bot configuration parameters.
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"""
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self.matrix_client = matrix_client
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self.matrix_client_pool = matrix_client_pool
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self.cache = cache
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self.alertmanager_client = alertmanager_client
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self.config = config
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async def message(self, room: MatrixRoom, event: RoomMessageText) -> None:
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"""Callback for when a message event is received
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Args:
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room: The room the event came from.
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event: The event defining the message.
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"""
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# Ignore message when we aren't the leader in the client pool
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if self.matrix_client is not self.matrix_client_pool.matrix_client:
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return
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# Ignore messages from ourselves
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if event.sender in self.config.user_ids:
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return
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# Ignore messages from unauthorized room
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if (
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room.room_id not in self.config.allowed_rooms
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and event.sender not in self.config.dm_users.inverse
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):
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return
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# Extract the message text
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msg = strip_fallback(event.body)
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logger.debug(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Message received: {msg}"
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)
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user_id_patterns = []
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for user_id in self.config.user_ids:
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user, homeserver = user_id.split(":")
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username = user[1:]
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user_id_patterns.append(rf"@?{username}(:{homeserver})?")
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pattern = re.compile(
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rf"(^|\s+)({'|'.join(user_id_patterns)}):?(?=\s+|$)",
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re.IGNORECASE | re.MULTILINE,
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)
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if pattern.search(msg) is None:
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logger.debug(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Cannot process message: Bot was not mentionned."
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)
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return
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source_content = event.source["content"]
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reacted_to_event_id = (
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source_content.get("m.relates_to", {})
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.get("m.in_reply_to", {})
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.get("event_id")
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)
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if reacted_to_event_id is not None:
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logger.debug(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Command received is in reply to event ID {reacted_to_event_id}"
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)
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# Remove the mention of the bot
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cmd = pattern.sub(" ", msg).strip()
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logger.debug(
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"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Processing command {cmd}"
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)
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try:
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command = CommandFactory.create(
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cmd,
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self.matrix_client,
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self.cache,
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self.alertmanager_client,
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self.config,
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room,
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event.sender,
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event.event_id,
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reacted_to_event_id,
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)
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except TypeError as e:
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logger.error(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Cannot process command '{cmd}': {e}"
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)
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return
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try:
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await command.process()
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except (SendRetryError, LocalProtocolError) as e:
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logger.exception(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Cannot send message to room.",
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exc_info=e,
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)
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async def invite(self, room: MatrixRoom, event: InviteMemberEvent) -> None:
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"""Callback for when an invite is received. Join the room specified in the invite.
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Args:
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room: The room that we are invited to.
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event: The invite event.
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"""
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# Ignore invites from unauthorized room
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if (
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room.room_id not in self.config.allowed_rooms
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and event.sender not in self.config.user_ids
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and event.sender not in self.config.dm_users.inverse
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):
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return
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logger.debug(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Sender {event.sender} | "
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f"Invitation received."
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)
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# Attempt to join 3 times before giving up
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for attempt in range(3):
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result = await self.matrix_client.join(room.room_id)
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if isinstance(result, JoinError):
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logger.error(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Sender {event.sender} | "
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f"Error joining room (attempt {attempt}): {result.message}"
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)
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else:
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break
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else:
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logger.error(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Sender {event.sender} | "
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f"Unable to join room"
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)
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# Successfully joined room
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logger.info(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Sender {event.sender} | "
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f"Room joined."
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)
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async def invite_event_filtered_callback(
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self, room: MatrixRoom, event: InviteMemberEvent
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) -> None:
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"""
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Since the InviteMemberEvent is fired for every m.room.member state received
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in a sync response's `rooms.invite` section, we will receive some that are
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not actually our own invite event (such as the inviter's membership).
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This makes sure we only call `callbacks.invite` with our own invite events.
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"""
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if event.state_key == self.matrix_client.user_id:
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# This is our own membership (invite) event
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await self.invite(room, event)
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async def reaction(self, room: MatrixRoom, event: ReactionEvent) -> None:
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"""A reaction was sent to one of our messages. Let's send a reply acknowledging it.
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Args:
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room: The room the reaction was sent in.
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event: The reaction event.
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reacted_to_id: The event ID that the reaction points to.
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"""
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# Ignore message when we aren't the leader in the client pool
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if self.matrix_client is not self.matrix_client_pool.matrix_client:
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return
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# Ignore reactions from unauthorized room
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if (
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room.room_id not in self.config.allowed_rooms
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and event.sender not in self.config.dm_users.inverse
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):
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return
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# Ignore reactions from ourselves
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if event.sender in self.config.user_ids:
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return
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logger.debug(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Reaction received: {event.key}"
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)
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if event.key not in self.config.allowed_reactions:
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logger.warning(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Reaction not handled: {event.key}"
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)
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return
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alert_event_id = event.reacts_to
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# Get the original event that was reacted to
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event_response = await self.matrix_client.room_get_event(
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room.room_id, alert_event_id
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)
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if isinstance(event_response, RoomGetEventError):
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logger.warning(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Cannot get event related to the reaction and with event ID {alert_event_id}"
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)
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return
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reacted_to_event = event_response.event
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# Only acknowledge reactions to events that we sent
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if reacted_to_event.sender not in self.config.user_ids:
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return
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# Send a message acknowledging the reaction
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command = AckAlertCommand(
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self.matrix_client,
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self.cache,
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self.alertmanager_client,
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self.config,
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room,
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event.sender,
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event.event_id,
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alert_event_id,
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)
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try:
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await command.process()
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except (SendRetryError, LocalProtocolError) as e:
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logger.exception(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Cannot send message to room.",
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exc_info=e,
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)
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if event.key in self.config.insult_reactions:
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command = AngryUserCommand(
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self.matrix_client,
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self.cache,
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self.alertmanager_client,
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self.config,
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room,
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event.sender,
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event.event_id,
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)
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try:
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await command.process()
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except (SendRetryError, LocalProtocolError) as e:
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logger.exception(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Cannot send message to room.",
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exc_info=e,
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)
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async def redaction(self, room: MatrixRoom, event: RedactionEvent) -> None:
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# Ignore message when we aren't the leader in the client pool
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if self.matrix_client is not self.matrix_client_pool.matrix_client:
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return
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# Ignore events from unauthorized room
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if (
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room.room_id not in self.config.allowed_rooms
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and event.sender not in self.config.dm_users.inverse
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):
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return
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# Ignore redactions from ourselves
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if event.sender in self.config.user_ids:
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return
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logger.debug(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Received event to remove event ID {event.redacts}"
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)
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command = UnackAlertCommand(
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self.matrix_client,
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self.cache,
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self.alertmanager_client,
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self.config,
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room,
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event.sender,
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event.event_id,
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event.redacts,
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)
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try:
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await command.process()
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except (SendRetryError, LocalProtocolError) as e:
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logger.exception(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Cannot send message to room.",
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exc_info=e,
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)
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async def decryption_failure(self, room: MatrixRoom, event: MegolmEvent) -> None:
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"""Callback for when an event fails to decrypt. Inform the user.
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Args:
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room: The room that the event that we were unable to decrypt is in.
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event: The encrypted event that we were unable to decrypt.
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"""
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# Ignore events from unauthorized room
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if (
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room.room_id not in self.config.allowed_rooms
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and event.sender not in self.config.dm_users.inverse
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):
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return
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logger.error(
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f"Bot {self.matrix_client.user_id} | Room ID {room.room_id} | "
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f"Event ID {event.event_id} | Sender {event.sender} | "
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f"Failed to decrypt event!"
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f"\n\n"
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f"Tip: try using a different device ID in your config file and restart."
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f"\n\n"
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f"If all else fails, delete your store directory and let the bot recreate "
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f"it (your reminders will NOT be deleted, but the bot may respond to existing "
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f"commands a second time)."
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)
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async def key_verification_start(self, event: KeyVerificationStart):
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"""Callback for when somebody wants to verify our devices."""
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if "emoji" not in event.short_authentication_string:
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logger.error(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
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f"Cannot use emoji verification with device {event.from_device}."
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)
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return
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event_response = await self.matrix_client.accept_key_verification(
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event.transaction_id
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)
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if isinstance(event_response, ToDeviceError):
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logger.error(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
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f"Cannot start key verification with device {event.from_device}, got error: {event_response}."
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)
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return
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sas = self.matrix_client.key_verifications[event.transaction_id]
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todevice_msg = sas.share_key()
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event_response = await self.matrix_client.to_device(todevice_msg)
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if isinstance(event_response, ToDeviceError):
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logger.error(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
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f"Cannot share key with device {event.from_device}, got error: {event_response}."
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)
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return
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async def key_verification_cancel(self, event: KeyVerificationCancel):
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# There is no need to issue a
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# client.cancel_key_verification(tx_id, reject=False)
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# here. The SAS flow is already cancelled.
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# We only need to inform the user.
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logger.info(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
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f"Key verification has been cancelled for reason: {event.reason}."
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)
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async def key_verification_confirm(self, event: KeyVerificationKey):
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sas = self.matrix_client.key_verifications[event.transaction_id]
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emoji_list, alt_text_list = zip(*sas.get_emoji())
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emoji_str = " ".join(emoji_list)
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alt_text_str = " ".join(alt_text_list)
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logger.info(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
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f"Received request to verify emojis: {emoji_str} ({alt_text_str})"
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)
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event_response = await self.matrix_client.confirm_short_auth_string(
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event.transaction_id
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)
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if isinstance(event_response, ToDeviceError):
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logger.error(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
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f"Cannot confirm emoji verification, got error: {event_response}."
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)
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# FIXME: We should allow manual cancel or reject
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# event_response = await self.matrix_client.cancel_key_verification(
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# event.transaction_id, reject=True
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# )
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# if isinstance(event_response, ToDeviceError):
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# logger.error(
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# f"Unable to reject emoji verification with {event.sender}, got error: {event_response}."
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# )
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#
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# event_response = await self.matrix_client.cancel_key_verification(
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# event.transaction_id, reject=False
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# )
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# if isinstance(event_response, ToDeviceError):
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# logger.error(
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# f"Unable to cancel emoji verification with {event.sender}, got error: {event_response}."
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# )
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async def key_verification_end(self, event: KeyVerificationMac) -> None:
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try:
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sas = self.matrix_client.key_verifications[event.transaction_id]
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except KeyError:
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logger.error(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
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f"Cannot find transaction ID {event.transaction_id}"
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)
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return
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try:
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todevice_msg = sas.get_mac()
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except LocalProtocolError as e:
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# e.g. it might have been cancelled by ourselves
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logger.warning(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
|
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f"Cannot conclude key verification: {e}."
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)
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return
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event_response = await self.matrix_client.to_device(todevice_msg)
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if isinstance(event_response, ToDeviceError):
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logger.error(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
|
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f"Cannot conclude key verification, got error: {event_response}."
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)
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return
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verified_devices = " ".join(sas.verified_devices)
|
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logger.info(
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f"Bot {self.matrix_client.user_id} | Sender {event.sender} | "
|
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f"Successfully verified devices: {verified_devices}"
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)
|
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|
async def unknown_message(
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self, room: MatrixRoom, event: RoomMessageUnknown
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) -> None:
|
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event_content = event.source["content"]
|
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if event_content["msgtype"] != "m.key.verification.request":
|
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return
|
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|
|
if "m.sas.v1" not in event_content["methods"]:
|
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return
|
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|
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response_event = await self.matrix_client.room_send(
|
|
room.room_id,
|
|
"m.room.message",
|
|
{
|
|
"msgtype": "m.key.verification.ready",
|
|
"methods": ["m.sas.v1"],
|
|
"m.relates_to": {"rel_type": "m.reference", "event_id": event.event_id},
|
|
},
|
|
)
|
|
|
|
if isinstance(response_event, RoomSendError):
|
|
raise SendRetryError(
|
|
f"{response_event.status_code} - {response_event.message}"
|
|
)
|