バグを見つけろ：Node.js / NestJS

1import { WebSocketGateway, SubscribeMessage, MessageBody, ConnectedSocket } from '@nestjs/websockets';
2import { Socket } from 'socket.io';
3import { MessagesService } from './messages.service';
4
5@WebSocketGateway({ namespace: 'chat' })
6export class ChatGateway {
7  constructor(private readonly messages: MessagesService) {}
8
9  @SubscribeMessage('joinRoom')
10  async joinRoom(
11    @ConnectedSocket() client: Socket,
12    @MessageBody() data: { roomId: string },
13  ) {
14    client.join(data.roomId);
15    const history = await this.messages.getRoomHistory(data.roomId);
16    client.emit('history', history);
17  }
18}