Fetch Diablo 2 Terror Zone

terror.js

#! /usr/bin/node

const jsdom = require('jsdom')
const { JSDOM } = jsdom;

(async () => {
  var dom;

  if (process.argv.length > 2) {
    dom = await JSDOM.fromFile (process.argv[2]);
  } else {
    let options = {};
    if (process.env.https_proxy) {
      options = {
        resources: new jsdom.ResourceLoader ({
          proxy: process.env.https_proxy
        })
      };
      dom = await JSDOM.fromURL ('https://d2runewizard.com/terror-zone-tracker',
                                 options);
    }
  }

  const path = 'html body div main div div div div div h2';
  const nodes = Array.from (dom.window.document
                            .querySelector (path)
                            .parentElement.childNodes);

  const zone = nodes[0].textContent;

  const names = {f: 'fire',
                 c: 'cold',
                 ph: 'physical',
                 m: 'magical',
                 l: 'lightning',
                 p: 'poison'};
  const immunities = [...nodes[1].querySelectorAll ('span span')]
        .slice (1)
        .map (node => names[node.textContent])
        .sort ()
        .join (', ');

  const super_unique = [...nodes[2].childNodes]
        .slice (1)
        .map (node => node.textContent.trim())
        .reduce ((acc, val) => val === '' ? acc : acc.concat (val), [])
        .join ('');

  const boss_packs = [...nodes[3].childNodes]
        .slice (1)
        .map (node => node.textContent.trim())
        .reduce ((acc, val) => val === '' ? acc : acc.concat (val), [])
        .join (' ');

  const remaining = nodes[4].textContent;

  process.stdout.write (`Zone: ${zone}
Immunities: ${immunities}
Super Unique: ${super_unique}
Boss Packs: ${boss_packs}
Remaining: ${remaining}
`);
})();