Hi,

I have added a basic socket based chat to my nestJS API and am unsure how to subscribe users to only the chat groups they are part of.

I think it's something to do with the '@Subscribe('chat') so I'm assuming I might need to catch the incoming userID, query the database for their groups and then loop and subscribe but thats just a guess.

Here's my code;

@WebSocketGateway()
export class ChatGateway implements OnGatewayConnection, OnGatewayDisconnect {

  @WebSocketServer() server;
  users = 0;

  constructor(
    private chatService: ChatService,
  ) {
  }

  async handleConnection(){
    this.users  ;
    this.server.emit('users', this.users);
  }

  async handleDisconnect(){
    this.users--;
    this.server.emit('users', this.users);
  }

  @SubscribeMessage('chat')
  async onChat(client, message){
    message.content = message.content.replace(/'/g, "\\'");
    await this.chatService.save(message);
    client.broadcast.emit('chat', message);
  }

}