frontend/src/api/socket.js


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import io from "socket.io-client";
import { getAuthToken } from "../auth/index";

let socket;
let requestIdCounter = 0;
const callbacks = {};

export function setupSocketConnection(onConnect) {
  let port = window.location.port;
  if (process.env.NODE_ENV !== "production") {
    port = 8081;
  }
  socket = io.connect(
    window.location.protocol + "//" + window.location.hostname + ":" + port
  );
  socket.on("connect", onConnect);
  socket.on("response", onSocketResponse);
}

export function sendSocketRequest(request, callback) {
  if (!socket.connected) {
    console.error("Attempted to send request over unconnected socket");
    return;
  }

  const newId = requestIdCounter++;
  callbacks[newId] = callback;

  request.id = newId;
  request.token = getAuthToken();

  if (!request.isRootRoute) {
    request.path = "/v2" + request.path;
  }

  socket.emit("request", request);

  if (process.env.NODE_ENV !== "production") {
    console.log("Sent socket request:", request);
  }
}

function onSocketResponse(json) {
  const response = JSON.parse(json);

  if (process.env.NODE_ENV !== "production") {
    console.log("Received socket response:", response);
  }

  callbacks[response.id](response);
  delete callbacks[response.id];
}