64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
from aiohttp import web, WSMsgType
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from typing import Dict, Set
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from .util import wrap_async
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from ..chat_io_buffer import ChatIOBuffer
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class ChatWebSocket:
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def __init__(self, io_buffer: ChatIOBuffer):
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self._io_buffer = io_buffer
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self._clients: Set[web.WebSocketResponse] = set()
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self._io_buffer.add_change_handler(wrap_async(self._handle_io_buffer_change))
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async def _broadcast_message(self, message: Dict):
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"""Broadcast message to all connected clients."""
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disconnected = set()
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for ws in self._clients:
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try:
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await ws.send_json(message)
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except ConnectionResetError:
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disconnected.add(ws)
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self._clients -= disconnected
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async def _handle_io_buffer_change(self, new_messages, deleted_message_ids, last_read_timestamp):
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"""Handle changes to the ChatIOBuffer."""
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await self._broadcast_message({
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"messages": [
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{
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"id": message.id,
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"content": message.content,
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"message_type": message.message_type.value
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}
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for message in new_messages
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],
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"deleted_message_ids": deleted_message_ids,
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"last_read_timestamp": last_read_timestamp
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})
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async def handle_connection(self, request: web.Request) -> web.WebSocketResponse:
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"""Handle new WebSocket connections."""
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ws = web.WebSocketResponse(heartbeat=30)
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await ws.prepare(request)
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try:
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# Send initial state
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await ws.send_json({
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"messages": [
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{
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"id": message.id,
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"content": message.content,
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"message_type": message.message_type.value
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}
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for message in self._io_buffer.messages
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],
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"last_read_timestamp": self._io_buffer.last_read_timestamp
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})
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self._clients.add(ws)
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async for msg in ws:
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if msg.type == WSMsgType.ERROR:
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print(f"WebSocket connection closed with error: {ws.exception()}")
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finally:
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self._clients.remove(ws)
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return ws |