345 lines
14 KiB
Python
345 lines
14 KiB
Python
from __future__ import annotations
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import asyncio
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from typing import overload
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from app.database.chat import ChannelType, ChatChannel, ChatChannelResp, ChatMessageResp
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from app.database.notification import UserNotification, insert_notification
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from app.database.user import User
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from app.dependencies.database import (
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DBFactory,
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get_db_factory,
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get_redis,
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with_db,
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)
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from app.dependencies.user import get_current_user_and_token
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from app.log import logger
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from app.models.chat import ChatEvent
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from app.models.notification import NotificationDetail
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from app.service.subscribers.chat import ChatSubscriber
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from app.utils import bg_tasks
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from fastapi import APIRouter, Depends, Header, Query, WebSocket, WebSocketDisconnect
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from fastapi.security import SecurityScopes
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from fastapi.websockets import WebSocketState
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from redis.asyncio import Redis
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from sqlmodel import select
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from sqlmodel.ext.asyncio.session import AsyncSession
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class ChatServer:
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def __init__(self):
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self.connect_client: dict[int, WebSocket] = {}
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self.channels: dict[int, list[int]] = {}
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self.redis: Redis = get_redis()
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self.tasks: set[asyncio.Task] = set()
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self.ChatSubscriber = ChatSubscriber()
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self.ChatSubscriber.chat_server = self
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self._subscribed = False
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def connect(self, user_id: int, client: WebSocket):
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self.connect_client[user_id] = client
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def get_user_joined_channel(self, user_id: int) -> list[int]:
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return [channel_id for channel_id, users in self.channels.items() if user_id in users]
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async def disconnect(self, user: User, session: AsyncSession):
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user_id = user.id
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if user_id in self.connect_client:
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del self.connect_client[user_id]
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# 创建频道ID列表的副本以避免在迭代过程中修改字典
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channel_ids_to_process = []
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for channel_id, channel in self.channels.items():
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if user_id in channel:
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channel_ids_to_process.append(channel_id)
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# 现在安全地处理每个频道
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for channel_id in channel_ids_to_process:
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# 再次检查用户是否仍在频道中（防止并发修改）
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if channel_id in self.channels and user_id in self.channels[channel_id]:
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self.channels[channel_id].remove(user_id)
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# 使用明确的查询避免延迟加载
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db_channel = (
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await session.exec(select(ChatChannel).where(ChatChannel.channel_id == channel_id))
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).first()
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if db_channel:
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await self.leave_channel(user, db_channel, session)
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@overload
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async def send_event(self, client: int, event: ChatEvent): ...
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@overload
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async def send_event(self, client: WebSocket, event: ChatEvent): ...
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async def send_event(self, client: WebSocket | int, event: ChatEvent):
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if isinstance(client, int):
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client_ = self.connect_client.get(client)
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if client_ is None:
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return
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client = client_
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if client.client_state == WebSocketState.CONNECTED:
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await client.send_text(event.model_dump_json())
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async def broadcast(self, channel_id: int, event: ChatEvent):
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users_in_channel = self.channels.get(channel_id, [])
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logger.info(f"Broadcasting to channel {channel_id}, users: {users_in_channel}")
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# 如果频道中没有用户，检查是否是多人游戏频道
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if not users_in_channel:
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try:
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async with with_db() as session:
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channel = await session.get(ChatChannel, channel_id)
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if channel and channel.type == ChannelType.MULTIPLAYER:
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logger.warning(
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f"No users in multiplayer channel {channel_id}, message will not be delivered to anyone"
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)
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# 对于多人游戏房间，这可能是正常的（用户都离开了房间）
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# 但我们仍然记录这个情况以便调试
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except Exception as e:
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logger.error(f"Failed to check channel type for {channel_id}: {e}")
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for user_id in users_in_channel:
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await self.send_event(user_id, event)
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logger.debug(f"Sent event to user {user_id} in channel {channel_id}")
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async def mark_as_read(self, channel_id: int, user_id: int, message_id: int):
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await self.redis.set(f"chat:{channel_id}:last_read:{user_id}", message_id)
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async def send_message_to_channel(self, message: ChatMessageResp, is_bot_command: bool = False):
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logger.info(
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f"Sending message to channel {message.channel_id}, message_id: "
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f"{message.message_id}, is_bot_command: {is_bot_command}"
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)
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event = ChatEvent(
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event="chat.message.new",
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data={"messages": [message], "users": [message.sender]},
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)
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if is_bot_command:
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logger.info(f"Sending bot command to user {message.sender_id}")
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bg_tasks.add_task(self.send_event, message.sender_id, event)
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else:
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# 总是广播消息，无论是临时ID还是真实ID
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logger.info(f"Broadcasting message to all users in channel {message.channel_id}")
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bg_tasks.add_task(
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self.broadcast,
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message.channel_id,
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event,
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)
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# 只有真实消息 ID（正数且非零）才进行标记已读和设置最后消息
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# Redis 消息系统生成的ID都是正数，所以这里应该都能正常处理
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if message.message_id and message.message_id > 0:
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await self.mark_as_read(message.channel_id, message.sender_id, message.message_id)
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await self.redis.set(f"chat:{message.channel_id}:last_msg", message.message_id)
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logger.info(f"Updated last message ID for channel {message.channel_id} to {message.message_id}")
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else:
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logger.debug(f"Skipping last message update for message ID: {message.message_id}")
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async def batch_join_channel(self, users: list[User], channel: ChatChannel, session: AsyncSession):
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channel_id = channel.channel_id
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not_joined = []
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if channel_id not in self.channels:
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self.channels[channel_id] = []
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for user in users:
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if user.id not in self.channels[channel_id]:
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self.channels[channel_id].append(user.id)
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not_joined.append(user)
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for user in not_joined:
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channel_resp = await ChatChannelResp.from_db(
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channel,
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session,
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user,
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self.redis,
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self.channels[channel_id] if channel.type != ChannelType.PUBLIC else None,
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)
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await self.send_event(
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user.id,
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ChatEvent(
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event="chat.channel.join",
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data=channel_resp.model_dump(),
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),
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)
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async def join_channel(self, user: User, channel: ChatChannel, session: AsyncSession) -> ChatChannelResp:
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user_id = user.id
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channel_id = channel.channel_id
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if channel_id not in self.channels:
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self.channels[channel_id] = []
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if user_id not in self.channels[channel_id]:
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self.channels[channel_id].append(user_id)
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channel_resp = await ChatChannelResp.from_db(
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channel,
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session,
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user,
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self.redis,
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self.channels[channel_id] if channel.type != ChannelType.PUBLIC else None,
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)
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await self.send_event(
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user_id,
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ChatEvent(
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event="chat.channel.join",
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data=channel_resp.model_dump(),
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),
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)
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return channel_resp
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async def leave_channel(self, user: User, channel: ChatChannel, session: AsyncSession) -> None:
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user_id = user.id
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channel_id = channel.channel_id
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if channel_id in self.channels and user_id in self.channels[channel_id]:
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self.channels[channel_id].remove(user_id)
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if (c := self.channels.get(channel_id)) is not None and not c:
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del self.channels[channel_id]
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channel_resp = await ChatChannelResp.from_db(
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channel,
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session,
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user,
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self.redis,
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self.channels.get(channel_id) if channel.type != ChannelType.PUBLIC else None,
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)
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await self.send_event(
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user_id,
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ChatEvent(
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event="chat.channel.part",
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data=channel_resp.model_dump(),
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),
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)
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async def join_room_channel(self, channel_id: int, user_id: int):
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async with with_db() as session:
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# 使用明确的查询避免延迟加载
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db_channel = (await session.exec(select(ChatChannel).where(ChatChannel.channel_id == channel_id))).first()
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if db_channel is None:
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logger.warning(f"Attempted to join non-existent channel {channel_id} by user {user_id}")
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return
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user = await session.get(User, user_id)
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if user is None:
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logger.warning(f"Attempted to join channel {channel_id} by non-existent user {user_id}")
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return
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logger.info(f"User {user_id} joining channel {channel_id} (type: {db_channel.type.value})")
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await self.join_channel(user, db_channel, session)
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async def leave_room_channel(self, channel_id: int, user_id: int):
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async with with_db() as session:
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# 使用明确的查询避免延迟加载
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db_channel = (await session.exec(select(ChatChannel).where(ChatChannel.channel_id == channel_id))).first()
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if db_channel is None:
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logger.warning(f"Attempted to leave non-existent channel {channel_id} by user {user_id}")
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return
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user = await session.get(User, user_id)
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if user is None:
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logger.warning(f"Attempted to leave channel {channel_id} by non-existent user {user_id}")
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return
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logger.info(f"User {user_id} leaving channel {channel_id} (type: {db_channel.type.value})")
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await self.leave_channel(user, db_channel, session)
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async def new_private_notification(self, detail: NotificationDetail):
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async with with_db() as session:
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id = await insert_notification(session, detail)
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users = (await session.exec(select(UserNotification).where(UserNotification.notification_id == id))).all()
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for user_notification in users:
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data = user_notification.notification.model_dump()
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data["is_read"] = user_notification.is_read
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data["details"] = user_notification.notification.details
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await server.send_event(
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user_notification.user_id,
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ChatEvent(
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event="new",
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data=data,
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),
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)
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server = ChatServer()
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chat_router = APIRouter(include_in_schema=False)
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async def _listen_stop(ws: WebSocket, user_id: int, factory: DBFactory):
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try:
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while True:
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packets = await ws.receive_json()
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if packets.get("event") == "chat.end":
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async for session in factory():
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user = await session.get(User, user_id)
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if user is None:
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break
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await server.disconnect(user, session)
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await ws.close(code=1000)
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break
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except WebSocketDisconnect as e:
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logger.info(f"[NotificationServer] Client {user_id} disconnected: {e.code}, {e.reason}")
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except RuntimeError as e:
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if "disconnect message" in str(e):
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logger.info(f"[NotificationServer] Client {user_id} closed the connection.")
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else:
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logger.exception(f"RuntimeError in client {user_id}: {e}")
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except Exception:
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logger.exception(f"Error in client {user_id}")
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@chat_router.websocket("/notification-server")
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async def chat_websocket(
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websocket: WebSocket,
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token: str | None = Query(None, description="认证令牌，支持通过URL参数传递"),
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access_token: str | None = Query(None, description="访问令牌，支持通过URL参数传递"),
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authorization: str | None = Header(None, description="Bearer认证头"),
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factory: DBFactory = Depends(get_db_factory),
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):
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if not server._subscribed:
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server._subscribed = True
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await server.ChatSubscriber.start_subscribe()
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async for session in factory():
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# 优先使用查询参数中的token，支持token或access_token参数名
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auth_token = token or access_token
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if not auth_token and authorization:
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if authorization.startswith("Bearer "):
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auth_token = authorization[7:]
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else:
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auth_token = authorization
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if not auth_token:
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await websocket.close(code=1008, reason="Missing authentication token")
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return
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if (
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user_and_token := await get_current_user_and_token(
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session, SecurityScopes(scopes=["chat.read"]), token_pw=auth_token
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)
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) is None:
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await websocket.close(code=1008, reason="Invalid or expired token")
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return
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await websocket.accept()
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login = await websocket.receive_json()
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if login.get("event") != "chat.start":
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await websocket.close(code=1008)
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return
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user = user_and_token[0]
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user_id = user.id
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server.connect(user_id, websocket)
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# 使用明确的查询避免延迟加载
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db_channel = (await session.exec(select(ChatChannel).where(ChatChannel.channel_id == 1))).first()
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if db_channel is not None:
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await server.join_channel(user, db_channel, session)
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await _listen_stop(websocket, user_id, factory)
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