Counts total MTX points spent in Path of Exile (https://www.pathofexile.com/my-account/microtransactions)

PoETotalMTXPointsCost.user.js

// ==UserScript==
// @name         PoE total MTX points cost
// @namespace    https://arnoldsk.lv/
// @version      2024-08-09
// @description  Counts total MTX points spent in Path of Exile
// @author       ArnoldsK
// @match        https://*.pathofexile.com/my-account/microtransactions*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=pathofexile.com
// @grant        none
// ==/UserScript==

;(() => {
  const handleGetCost = () => {
    const cost = [...document.querySelectorAll(".transaction-cost")]
      .map((el) => parseInt(el.innerText))
      .reduce((sum, value) => sum + value, 0)

    const totalCost = parseInt(localStorage.getItem("totalMtxCost") ?? "0") + cost
    localStorage.setItem("totalMtxCost", totalCost)

    console.log("Page cost", cost, "; Total cost", totalCost)

    const next = document.querySelector(".pagination .current").nextSibling
    if (!next) {
      localStorage.removeItem("handleGetCost")

      const costInUsd = Intl.NumberFormat("en-US", {
        style: "currency",
        currency: "USD",
      }).format(totalCost / 10)
      alert(`Total MTX cost is ${totalCost} points (${costInUsd})`)
    } else {
      setTimeout(() => {
        next.click()
      }, 3_000)
    }
  }

  const addButton = () => {
    const button = document.querySelector(".button-text")
    if (button && button.innerText.trim() === "View Account Transactions") {
      const el = document.createElement("a")
      el.classList.add("button-text")
      el.classList.add("red")
      el.innerText = "Count Total"
      el.href = "javascript:void(0)"
      el.addEventListener("click", () => {
        localStorage.setItem("handleGetCost", true)
        localStorage.setItem("totalMtxCost", 0)
        handleGetCost()
      })

      button.parentElement.insertBefore(el, button)
    }
  }

  if (
    localStorage.getItem("handleGetCost") &&
    /\/page\/\d+/.test(location.pathname) &&
    !/\/page\/1$/.test(location.pathname)
  ) {
    handleGetCost()
  } else {
    localStorage.removeItem("handleGetCost")
    addButton()
  }
})()