cactoz.su/frontend/js/game/network.js

import { ClientMessage, ServerMessage } from './protocol.js';

export class Network {
  constructor() {
    const proto = location.protocol === 'https:' ? 'wss' : 'ws';
    this.socket = new WebSocket(`${proto}://${location.host}/ws`);
    this.handlers = new Map();

    this.socket.addEventListener('open', () => this._emit('_open'));
    this.socket.addEventListener('close', () => this._emit('_close'));
    this.socket.addEventListener('message', (event) => {
      const msg = JSON.parse(event.data);
      this._emit(msg.type, msg.payload);
    });
  }

  on(type, handler) {
    this.handlers.set(type, handler);
  }

  _emit(type, payload) {
    this.handlers.get(type)?.(payload);
  }

  send(type, payload = {}) {
    this.socket.send(JSON.stringify({ type, payload }));
  }

  hello(nickname) {
    this.send(ClientMessage.HELLO, { nickname });
  }

  listRooms() {
    this.send(ClientMessage.LOBBY_LIST_ROOMS);
  }
}

export { ServerMessage };