Some JS functions used in Yakread

juice.js

// A serverless function for Readability that I'm currently using
let juice = require('juice');

function main(opts) {
  let html = juice(opts['html'], { webResources: { images: false } });
  return { body: { html } };
}

exports.main = main;

readability.js

// A serverless function for Readability that I'm currently using
let { Readability } = require('@mozilla/readability');
let { JSDOM } = require('jsdom');

function main(opts) {
  let doc = new JSDOM(opts['html'], {url: opts['url']});
  let reader = new Readability(doc.window.document);
  let article = reader.parse();
  return {body: article};
}

exports.main = main;

tools.js

// This file was previously used in Yakread. I opened it in a subprocess and communicated via pipes.
const readline = require('readline');
var juice;
var Readability;

function callJuice(opts) {
  let parsed = juice(opts['html'], {webResources: {images: false}});
  return parsed;
}

function callReadability(opts) {
  try {
    let doc = new JSDOM(opts['html'], { url: opts['url'] });
    let reader = new Readability(doc.window.document);
    let article = reader.parse();
    return article;
  } catch (error) {
    return {};
  }
}

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  terminal: false
});

rl.on('line', (line) => {
  var opts = JSON.parse(line);
  var ret;
  switch (opts['command']) {
    case 'juice':
      if (juice == null) {
        juice = require('juice');
      }
      ret = callJuice(opts);
      break;
    case 'readability':
      if (Readability == null) {
        Readability = require('@mozilla/readability')['Readability'];
        JSDOM = require('jsdom')['JSDOM'];
      }
      ret = callReadability(opts);
      break;
    default:
      ret = {error: `command not recognized: ${opts['command']}`};
    };
    process.stdout.write(JSON.stringify(ret));
    process.stdout.write('\n');
  }
);