SII Scrapper 2021

getSIIUF.js

const rp = require("request-promise");
const $ = require("cheerio");
const monthArray = [
  "#mes_enero",
  "#mes_febrero",
  "#mes_marzo",
  "#mes_abril",
  "#mes_mayo",
  "#mes_junio",
  "#mes_julio",
  "#mes_agosto",
  "#mes_septiembre",
  "#mes_octubre",
  "#mes_noviembre",
  "#mes_diciembre",
];
checkIt();

async function checkIt() {
  const thisMonth = monthArray[new Date().getMonth()];
  const thisYear = new Date().getFullYear();
  return rp({
    uri: "https://www.sii.cl/valores_y_fechas/uf/uf" + thisYear + ".htm",
  })
    .then(function (html) {
      let monthHtml = $(thisMonth, html).find("tbody tr");
      let rowDay1 = 1;
      let rowDay2 = 11;
      let rowDay3 = 21;
      let finalArray = [];

      Array.from(monthHtml).forEach((item, i) => {
        if (i > 0) {
          let one = $("td:nth-child(2)", item)
            .text()
            .replace(".", "")
            .replace(",", ".");
          let two = $("td:nth-child(4)", item)
            .text()
            .replace(".", "")
            .replace(",", ".");
          let three = $("td:nth-child(6)", item)
            .text()
            .replace(".", "")
            .replace(",", ".");

          if (one.length > 0) {
            finalArray.push({ day: rowDay1, uf: parseFloat(one) });
          }
          if (two.length > 0) {
            finalArray.push({ day: rowDay2, uf: parseFloat(two) });
          }
          if (three.length > 0) {
            finalArray.push({ day: rowDay3, uf: parseFloat(three) });
          }

          rowDay1++;
          rowDay2++;
          rowDay3++;
        }
      });
      finalArray.sort(compare);
      console.log(finalArray);
    })
    .catch(function (err) {
      console.log(err);
      return { err };
    });
}

function compare(a, b) {
  if (a.day < b.day) {
    return -1;
  }
  if (a.day > b.day) {
    return 1;
  }
  return 0;
}