mirror of
https://github.com/dcs-liberation/dcs_liberation.git
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55 lines
1.6 KiB
Python
55 lines
1.6 KiB
Python
import asyncio
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from asyncio import wait, Future
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from fastapi import APIRouter, WebSocket
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from fastapi.encoders import jsonable_encoder
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from .eventstream import EventStream
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from .models import GameUpdateEventsJs
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from .. import GameContext
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router: APIRouter = APIRouter()
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class ConnectionManager:
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def __init__(self) -> None:
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self.active_connections: list[WebSocket] = []
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async def shutdown(self) -> None:
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futures: list[Future[None]] = []
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for connection in self.active_connections:
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futures.append(asyncio.create_task(connection.close()))
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await wait(futures)
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async def connect(self, websocket: WebSocket) -> None:
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await websocket.accept()
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self.active_connections.append(websocket)
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def disconnect(self, websocket: WebSocket) -> None:
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self.active_connections.remove(websocket)
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async def broadcast(self, events: GameUpdateEventsJs) -> None:
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futures = []
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for connection in self.active_connections:
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futures.append(
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asyncio.create_task(connection.send_json(jsonable_encoder(events)))
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)
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await wait(futures)
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manager = ConnectionManager()
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@router.websocket("/eventstream")
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async def event_stream(websocket: WebSocket) -> None:
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await manager.connect(websocket)
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while True:
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if not (events := await EventStream.get()).empty:
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if events.shutting_down:
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await manager.shutdown()
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return
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await manager.broadcast(
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GameUpdateEventsJs.from_events(events, GameContext.get())
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)
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