liftie/lib/resorts/alta/index.js

Clean, simple, easy to read, fast ski resort lift status

const vm = require('node:vm');
const debug = require('debug')('liftie:resort:alta');

const select = require('../../select');
const { allText } = require('../../tools/domutil');

module.exports = parse;

function extractLiftData(script) {
  const data = vm.runInNewContext(script, { window: Object.create(null) });
  return data?.liftStatus?.lifts ?? {};
}

function parse(dom) {
  const dataScript = select(dom, 'script')
    .map(script => allText(script).trim())
    .find(script => script.includes('window.Alta = '));

  const liftStatus = extractLiftData(dataScript).reduce((ls, { name, open }) => {
    ls[name] = open ? 'open' : 'closed';
    return ls;
  }, {});

  debug('Alta Lift Status:', liftStatus);
  return liftStatus;
}