BigQuery price to Reais

BigQuery-price-to-Reais.user.js

// ==UserScript==
// @name         BigQuery price to Reais
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  nope
// @author       You
// @match        https://console.cloud.google.com/bigquery*
// @grant        none
// @updateURL     https://gist.github.com/yurighensev/aa050af4a0526e404dfbb2171aa4c9ce
// ==/UserScript==

(function() {
  function fetchDolarPrice() {
    var d = new Date()
    var today = (d.getMonth() + 1) + "-" + d.getDate() + "-" + d.getFullYear()
    var dolarUrl = "https://olinda.bcb.gov.br/olinda/servico/PTAX/versao/v1/odata/CotacaoDolarDia(dataCotacao=@dataCotacao)?@dataCotacao='" + today + "'&$top=100&$format=json"

    fetch(dolarUrl)
      .then(function(r) { return r.json() } )
      .then(function(data) { localStorage.setItem("dolar", data.value[0].cotacaoCompra) })
      .then(observePriceChange)
  }

  function observePriceChange() {
    setTimeout(function() {
      var costField = document.querySelector('.custom-proccess-text')

      if (costField) {
        convertToReais()

        var observer = new MutationObserver(function(mutations) {
          mutations.forEach(function(mutation) {
            if (mutation.type == 'childList') {
              convertToReais()
            }
          })
        })

        observer.observe(costField, { attributes: true, childList: true, characterData: true })
      } else {
        observePriceChange()
      }
    }, 500)
  }

  function convertToReais() {
    var costField = document.querySelector('.custom-proccess-text')
    var dolarValue = costField.innerText.match(/\$(\d\.\d+)/)[1]
    var dolarToRealPrice = localStorage.getItem("dolar")

    var newText = costField.innerText.replace('$' + dolarValue, ' R$ ' + (dolarToRealPrice * dolarValue).toFixed(4))
    costField.innerText = newText
  }

  window.addEventListener('load', function() {
    fetchDolarPrice()
  })
})()