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170 lines
6.0 KiB
Python
170 lines
6.0 KiB
Python
"""
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The Client class.
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Connect to the matrix server and handle interactions with the server.
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"""
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import asyncio
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import nio
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from aiopath import AsyncPath
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from typing import (
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Optional,
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NoReturn,
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Union
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)
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from .async_utils import Aobject
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from .utils import (
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Room,
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RoomAlias,
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RoomId
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)
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class Client(Aobject):
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"""
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Connect to the matrix server and handle interactions with the
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server.
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allowed_rooms: dict of the rooms where the bot is allowed to connect, indexed
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by id (the name starting with '!'). If set to None, the bot connect to
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all room where it is invited.
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/!\ The client is initialized asyncronously: `client = await Client(...)`
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"""
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__client: nio.AsyncClient
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__rooms_by_aliases: dict[RoomAlias, Room]
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__rooms_by_id: dict[RoomId, Room]
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__sync_token_file: AsyncPath
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__sync_token:Optional[str]
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__sync_token_queue:asyncio.Queue[str]
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allowed_rooms: Optional[dict[RoomId, Room]]
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async def __init__(
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self,
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username: str,
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homeserver: str,
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password: str,
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allowed_rooms_names: Optional[list[Union[RoomAlias, RoomId]]]=None,
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sync_token_file:str="./.sync_token",
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):
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"""
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Initialize the Client.
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username: the username used by the bot
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homeserver: the matrix home server of the bot (expl: "https://matrix.org")
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password: the password of the user
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allowed_rooms: the list of the rooms where the bot is allowed to connect
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(given by room id (expl: '!xxx:matrix.org') of room alias (expl:
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'#xxx:matrix.org'))
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sync_token_file: the file where is stored the last sync token received from
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the sync responses. This token avoid reloadind all the history of the
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bot each time we start it.
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"""
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self.__client = nio.AsyncClient(
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homeserver,
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username
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)
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self.__rooms_by_aliases = {}
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self.__rooms_by_id = {}
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self.__sync_token_file = AsyncPath(sync_token_file)
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if (await self.__sync_token_file.is_file()):
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async with self.__sync_token_file.open() as file:
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self.__sync_token = (await file.read()).strip()
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else:
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self.__sync_token = None
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self.__sync_token_queue = asyncio.Queue()
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resp = await self.__client.login(password)
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if isinstance(resp, nio.responses.LoginError):
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raise RuntimeError(f"Fail to connect: {resp.message}")
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self.allowed_rooms = None
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if allowed_rooms_names:
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self.allowed_rooms = {}
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rooms = await asyncio.gather(*(self.resolve_room(room_name) for room_name in allowed_rooms_names))
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for room in rooms:
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self.allowed_rooms[room.id] = room # room uniqueness is handled by self.resolve_room
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async def resolve_room(
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self,
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room_name: Union[RoomAlias, RoomId]
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)->Room:
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"""
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Lookup a room from its id or alias.
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If the name has already been resolved by this client, the
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room is return directly without querying the server.
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"""
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# If the room_name is empty:
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if len(room_name) == 0:
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raise ValueError(f"Invalid room_name: {room_name}")
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# If it is a known room id:
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if room_name[0] == '!' and room_name in self.__rooms_by_id:
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return self.__rooms_by_id[room_name]
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# If it is a unknown room id:
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elif room_name[0] == '!':
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room = Room(id=room_name)
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self.__rooms_by_id[room_name] = room
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return room
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# If it is not a room id nor a room alias:
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elif room_name[0] != '#':
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raise ValueError(f"Invalid room_name: {room_name}")
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# If it is a known room alias:
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elif room_name in self.__rooms_by_aliases:
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return self.__rooms_by_aliases[room_name]
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# If it is an unknown room alias:
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else:
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resp = await self.__client.room_resolve_alias(room_name)
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if isinstance(resp, nio.responses.RoomResolveAliasError):
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raise RuntimeError(f"Error while resolving alias: {resp.message}")
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# If the room is already known:
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if resp.room_id in self.__rooms_by_id:
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room = self.__rooms_by_id[resp.room_id]
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room.aliases.add(room_name)
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# If the room is unknwon:
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else:
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room = Room(id=resp.room_id,aliases={room_name})
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self.__rooms_by_id[resp.room_id] = room
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self.__rooms_by_aliases[room_name] = room
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return room
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async def __save_sync_tocken(self)->NoReturn:
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"""
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Save the sync token.
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"""
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while True:
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token = await self.__sync_token_queue.get()
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async with self.__sync_token_file.open(mode='w') as file:
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await file.write(token)
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self.__sync_token_queue.task_done()
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async def __sync(
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self,
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sync_timeout:int=30
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)->NoReturn:
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"""
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Sync with the server every sync_delta seconds.
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sync_timeout: the max time in sec between each sync.
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"""
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while True:
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sync_resp = await self.__client.sync(
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sync_delta*1000,
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since=self.__sync_token
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)
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if isinstance(sync_resp, nio.responses.SyncError):
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print(f"Error while syncronizing: {sync_resp.message}") # TODO: use proper logging
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continue
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self.__sync_token = sync_resp.next_batch
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await self.__sync_token_queue.put(self.__sync_token)
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async def run(
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self,
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sync_timeout:int=30
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)->NoReturn:
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"""
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Run the bot: sync with the server and execute callbacks.
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sync_timeout: the max time in sec between each sync.
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"""
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await asyncio.gather(
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self.__sync(sync_delta=sync_delta),
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self.__save_sync_tocken()
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)
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