Files
lnbits/lnbits/core/services/websockets.py
T

66 lines
2.2 KiB
Python

from asyncio import Queue
from dataclasses import dataclass
from fastapi import WebSocket, WebSocketDisconnect
from loguru import logger
from lnbits.settings import settings
@dataclass
class WebsocketConnection:
item_id: str
websocket: WebSocket
receive_queue: Queue[str]
class WebsocketConnectionManager:
def __init__(self) -> None:
self.active_connections: list[WebsocketConnection] = []
async def connect(self, item_id: str, websocket: WebSocket) -> WebsocketConnection:
logger.debug(f"Websocket connected to {item_id}")
await websocket.accept()
conn = WebsocketConnection(
item_id=item_id,
websocket=websocket,
receive_queue=Queue(),
)
self.active_connections.append(conn)
return conn
async def listen(self, conn: WebsocketConnection) -> None:
while settings.lnbits_running:
try:
data = await conn.websocket.receive_text()
logger.debug(f"WS received data from {conn.item_id}: {data}")
conn.receive_queue.put_nowait(data)
except WebSocketDisconnect:
for _conn in self.active_connections:
if _conn.websocket == conn.websocket:
self.active_connections.remove(_conn)
logger.debug(f"WS disconnected from {conn.item_id}")
break # out of the listen and the fastapi route
def get_connections(self, item_id: str) -> list[WebsocketConnection]:
conns = []
for conn in self.active_connections:
if conn.item_id == item_id:
conns.append(conn)
return conns
def has_connection(self, item_id: str) -> bool:
return len(self.get_connections(item_id)) > 0
async def send(self, item_id: str, data: str) -> None:
for conn in self.get_connections(item_id):
await conn.websocket.send_text(data)
websocket_manager = WebsocketConnectionManager()
# deprecated import and use `websocket_manager.send()` instead
async def websocket_updater(item_id: str, data: str) -> None:
return await websocket_manager.send(item_id, data)