Extensión de Argos para Gnome para ver el valor del dolar desde Banco Nación

dolar.10m+.js

#!/home/nahuel/.nvm/versions/node/v11.15.0/bin/node

const fetch = require('node-fetch');
const fs = require('fs');
const parse = require('node-html-parser').parse;
const notifier = require('node-notifier');

const display = text => console.log(`<span> </span><span foreground="greenyellow">${text}</span>`);

const URL = 'http://www.bna.com.ar/Personas';
const saveFile = '/home/nahuel/.config/argos-dolar.txt';

fetch(URL)
  .then(res => res.text())
  .then(body => {
    const root = parse(body);
    const billetesRow = root.querySelectorAll('#billetes tbody tr');
    const valorDolar = billetesRow[0].querySelectorAll('td');
    const precioVenta = parseFloat(valorDolar[2].text.replace(',','.'));
    const precioSolidario = (precioVenta*1.3).toFixed(2);
    const valorDisplay = `C/$${parseFloat(valorDolar[1].text.replace(',','.'))} V/$${precioVenta} ($${precioSolidario})`;
    display(valorDisplay);

    fs.readFile(saveFile, "utf8", (err, data) => {
      if (err){
        fs.writeFile(saveFile, valorDisplay, (err) => {
          if (err) throw err;
        });
      } else {
        if( data !== valorDisplay ) {
          notifier.notify({
            title: "Variación del dolar!",
            message: `${valorDisplay} (antes: ${data})`
          });
          fs.writeFile(saveFile, valorDisplay, (err) => {
            if (err) throw err;
          });
        }
      }
    });
  });