@chris-lewis/fitbit-utils/src/companion/comm.js

Common utility modules for common tasks across projects.

import { outbox } from 'file-transfer';
import * as cbor from 'cbor';
import * as messaging from 'messaging';

/**
 * Send a message through the peerSocket.
 * Appears to be less reliable then file-transfer.
 *
 * @param {Object} data - JSON object data to send.
 */
export const sendMessage = data => messaging.peerSocket.send(data);

/**
 * Send a JSON object as a file. Appears to be almost always reliable,
 * allowing a couple of seconds typical to transfer.
 *
 * @param {Object} data - JSON object data to send.
 * @param {string} [fileName] - Optional explicit file name.
 * @returns {Promise}
 */
export const sendFile = (data, fileName = 'data.json') =>
  outbox.enqueue(fileName, cbor.encode(data))
    .then((res) => console.log(`File '${fileName}' enqueued`));

/**
 * Setup handlers for messaging and file-transfer events.
 *
 * @param {Object} handlers - Handlers for socket open, socket message,
 *                            errors, and file received events.
 */
export const setup = (handlers) => {
  const { open, message, error } = handlers;

  messaging.peerSocket.onopen = open;
  messaging.peerSocket.onmessage = message;
  messaging.peerSocket.onerror = error;
};