279 lines
8.8 KiB
Python
279 lines
8.8 KiB
Python
# SPDX-License-Identifier: LGPL-3.0-or-later
|
|
|
|
import asyncio
|
|
import logging as log
|
|
import sys
|
|
import traceback
|
|
from pathlib import Path
|
|
from typing import Any, DefaultDict, Dict, List, Optional
|
|
|
|
import nio
|
|
from appdirs import AppDirs
|
|
|
|
from . import __app_name__
|
|
from .errors import MatrixError
|
|
from .matrix_client import MatrixClient
|
|
from .media_cache import MediaCache
|
|
from .models import SyncId
|
|
from .models.items import Account
|
|
from .models.model_store import ModelStore
|
|
from .user_files import Accounts, History, Theme, UISettings, UIState
|
|
|
|
# Logging configuration
|
|
log.getLogger().setLevel(log.INFO)
|
|
nio.logger_group.level = nio.log.logbook.ERROR
|
|
nio.log.logbook.StreamHandler(sys.stderr).push_application()
|
|
|
|
|
|
class Backend:
|
|
"""Manage matrix clients and provide other useful general methods.
|
|
|
|
Attributes:
|
|
saved_accounts: User config file for saved matrix account details.
|
|
|
|
ui_settings: User config file for QML interface settings.
|
|
|
|
ui_state: User data file for saving/restoring QML UI state.
|
|
|
|
history: User data file for saving/restoring lines typed into QML
|
|
components.
|
|
|
|
models: A dict containing our data models that are synchronized between
|
|
the Python backend and the QML UI.
|
|
The models should only ever be modified from the backend.
|
|
|
|
The dict keys are the `Model`'s synchronization ID,
|
|
which are in one of these form:
|
|
|
|
- A `ModelItem` type, the type of item that this model stores;
|
|
- A `(ModelItem, str...)` tuple.
|
|
|
|
Currently used sync ID throughout the code are:
|
|
|
|
- `Account`: logged-in accounts;
|
|
|
|
- `(Room, "<user_id>")`: rooms a `user_id` account is part of;
|
|
|
|
- `(Upload, "<user_id>")`: ongoing or failed file uploads for a
|
|
`user_id` account;
|
|
|
|
- `(Member, "<user_id>", "<room_id>")`: members in the room
|
|
`room_id` that account `user_id` is part of;
|
|
|
|
- `(Event, "<user_id>", "<room_id>")`: state events and messages
|
|
in the room `room_id` that account `user_id` is part of.
|
|
|
|
clients: A dict containing the logged `MatrixClient` objects we manage.
|
|
Each client represents a logged-in account,
|
|
identified by its `user_id`.
|
|
|
|
media_cache: A matrix media cache for downloaded files.
|
|
"""
|
|
|
|
def __init__(self) -> None:
|
|
self.appdirs = AppDirs(appname=__app_name__, roaming=True)
|
|
|
|
self.saved_accounts: Accounts = Accounts(self)
|
|
self.ui_settings: UISettings = UISettings(self)
|
|
self.ui_state: UIState = UIState(self)
|
|
self.history: History = History(self)
|
|
|
|
self.models: ModelStore = ModelStore()
|
|
self.clients: Dict[str, MatrixClient] = {}
|
|
|
|
self.profile_cache: Dict[str, nio.ProfileGetResponse] = {}
|
|
self.get_profile_locks: DefaultDict[str, asyncio.Lock] = \
|
|
DefaultDict(asyncio.Lock) # {user_id: lock}
|
|
|
|
self.send_locks: DefaultDict[str, asyncio.Lock] = \
|
|
DefaultDict(asyncio.Lock) # {room_id: lock}
|
|
|
|
cache_dir = Path(self.appdirs.user_cache_dir)
|
|
self.media_cache: MediaCache = MediaCache(self, cache_dir)
|
|
|
|
|
|
def __repr__(self) -> str:
|
|
return f"{type(self).__name__}(clients={self.clients!r})"
|
|
|
|
|
|
# Clients management
|
|
|
|
async def login_client(self,
|
|
user: str,
|
|
password: str,
|
|
device_id: Optional[str] = None,
|
|
homeserver: str = "https://matrix.org",
|
|
) -> str:
|
|
"""Create and register a `MatrixClient`, login and return a user ID."""
|
|
|
|
client = MatrixClient(
|
|
self, user=user, homeserver=homeserver, device_id=device_id,
|
|
)
|
|
|
|
try:
|
|
await client.login(password)
|
|
except MatrixError:
|
|
await client.close()
|
|
raise
|
|
|
|
self.clients[client.user_id] = client
|
|
self.models["accounts"][client.user_id] = Account(client.user_id)
|
|
return client.user_id
|
|
|
|
|
|
async def resume_client(self,
|
|
user_id: str,
|
|
token: str,
|
|
device_id: str,
|
|
homeserver: str = "https://matrix.org") -> None:
|
|
"""Create and register a `MatrixClient` with known account details."""
|
|
|
|
client = MatrixClient(
|
|
backend=self,
|
|
user=user_id, homeserver=homeserver, device_id=device_id,
|
|
)
|
|
|
|
self.clients[user_id] = client
|
|
self.models["accounts"][user_id] = Account(user_id)
|
|
|
|
await client.resume(user_id=user_id, token=token, device_id=device_id)
|
|
|
|
|
|
async def load_saved_accounts(self) -> List[str]:
|
|
"""Call `resume_client` for all saved accounts in user config."""
|
|
|
|
async def resume(user_id: str, info: Dict[str, str]) -> str:
|
|
await self.resume_client(
|
|
user_id = user_id,
|
|
token = info["token"],
|
|
device_id = info["device_id"],
|
|
homeserver = info["homeserver"],
|
|
)
|
|
return user_id
|
|
|
|
return await asyncio.gather(*(
|
|
resume(uid, info)
|
|
for uid, info in (await self.saved_accounts.read()).items()
|
|
))
|
|
|
|
|
|
async def logout_client(self, user_id: str) -> None:
|
|
"""Log a `MatrixClient` out and unregister it from our models."""
|
|
|
|
client = self.clients.pop(user_id, None)
|
|
if client:
|
|
self.models["accounts"].pop(user_id, None)
|
|
await client.logout()
|
|
|
|
await self.saved_accounts.delete(user_id)
|
|
|
|
|
|
async def get_client(self, user_id: str) -> MatrixClient:
|
|
"""Wait until a `MatrixClient` is registered in model and return it."""
|
|
|
|
failures = 0
|
|
|
|
while True:
|
|
if user_id in self.clients:
|
|
return self.clients[user_id]
|
|
|
|
if failures and failures % 100 == 0: # every 10s except first time
|
|
log.warning(
|
|
"Client %r not found after %ds, stack trace:\n%s",
|
|
user_id, failures / 10, traceback.format_stack(),
|
|
)
|
|
|
|
await asyncio.sleep(0.1)
|
|
failures += 1
|
|
|
|
|
|
async def get_any_client(self) -> MatrixClient:
|
|
"""Return any healthy syncing `MatrixClient` registered in model."""
|
|
|
|
failures = 0
|
|
|
|
while True:
|
|
for client in self.clients.values():
|
|
if client.syncing:
|
|
return client
|
|
|
|
if failures and failures % 300 == 0:
|
|
log.warn(
|
|
"No healthy client found after %ds, stack trace:\n%s",
|
|
failures / 10, traceback.format_stack(),
|
|
)
|
|
|
|
await asyncio.sleep(0.1)
|
|
failures += 1
|
|
|
|
|
|
# Client functions that don't need authentification
|
|
|
|
async def get_profile(self, user_id: str) -> nio.ProfileGetResponse:
|
|
"""Cache and return the matrix profile of `user_id`."""
|
|
|
|
if user_id in self.profile_cache:
|
|
return self.profile_cache[user_id]
|
|
|
|
async with self.get_profile_locks[user_id]:
|
|
client = await self.get_any_client()
|
|
response = await client.get_profile(user_id)
|
|
|
|
self.profile_cache[user_id] = response
|
|
return response
|
|
|
|
|
|
async def thumbnail(
|
|
self, server_name: str, media_id: str, width: int, height: int,
|
|
) -> nio.ThumbnailResponse:
|
|
"""Return thumbnail for a matrix media."""
|
|
|
|
args = (server_name, media_id, width, height)
|
|
client = await self.get_any_client()
|
|
return await client.thumbnail(*args)
|
|
|
|
|
|
async def download(
|
|
self, server_name: str, media_id: str,
|
|
) -> nio.DownloadResponse:
|
|
"""Return the content of a matrix media."""
|
|
|
|
client = await self.get_any_client()
|
|
return await client.download(server_name, media_id)
|
|
|
|
|
|
# General functions
|
|
|
|
async def load_settings(self) -> tuple:
|
|
"""Return parsed user config files."""
|
|
|
|
settings = await self.ui_settings.read()
|
|
ui_state = await self.ui_state.read()
|
|
history = await self.history.read()
|
|
theme = await Theme(self, settings["theme"]).read()
|
|
|
|
return (settings, ui_state, history, theme)
|
|
|
|
|
|
async def await_model_item(
|
|
self, model_id: SyncId, item_id: Any,
|
|
) -> Dict[str, Any]:
|
|
|
|
if isinstance(model_id, list): # when called from QML
|
|
model_id = tuple(model_id)
|
|
|
|
failures = 0
|
|
|
|
while True:
|
|
try:
|
|
return self.models[model_id][item_id].serialized
|
|
except KeyError:
|
|
if failures and failures % 300 == 0:
|
|
log.warn(
|
|
"Item %r not found in model %r after %ds",
|
|
item_id, model_id, failures / 10,
|
|
)
|
|
|
|
await asyncio.sleep(0.1)
|
|
failures += 1
|