pumpIO.js

const chokidar = require('chokidar');
const fs = require('fs');

module.exports = (io) => {
  let basalProfile;

  const readBasalProfile = (path) => {
    console.log(`Reading file ${path}`);
    setTimeout(function() {
      fs.readFile(path, 'utf8', function (err, data) {
        if (err) return; // we'll not consider error handling for now
        try {
          basalProfile = JSON.parse(data);
          io.emit('basalProfile', basalProfile);
        } catch (e) {
          return;
        }
      });
    }, 1000);
  }

  chokidar.watch('myopenaps/settings/basal_profile.json')
  .on('change', readBasalProfile)
  .on('add', readBasalProfile);

  io.on('connection', socket => {
    socket.emit('basalProfile', basalProfile);
    // iob = require('/root/myopenaps/monitor/iob.json');
    // socket.emit('iob', iob[0]['iob']);
  });
};