UserScript для отображения цен на megamarket

megamarket-price.userscript.js

// ==UserScript==
// @name         Отображение цены за вычетом кешбека
// @namespace    http://tampermonkey.net/
// @version      2024-06-13
// @description  Упращает поиск реальной нижней цены, сортирует по реальной цене и отображает ее.
// @author       You
// @match        https://megamarket.ru/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=megamarket.ru
// @grant        none
// ==/UserScript==

(function () {
    'use strict';
    const calculate = () => {

        const selectors = [
            {
                list: ".product-list-item-price, .product-offer-price, .offers-info, .cart-item-price__main-info, .catalog-item-regular-desktop__price-block, .goods-item-card__price",
                discont: ".bonus-amount",
                price: ".goods-item-card__amount, .product-offer-price__amount, .catalog-item-regular-desktop__price, .amount, .sales-block-offer-price__price-final, .price, .catalog-item-regular-desktop__price"
            },
            //{list: '.catalog-item-desktop', discont: ".bonus-amount", price: ".catalog-item-regular-desktop__price"},
            //{list: '.product-list-item-price', discont: ".bonus-amount", price: ".amount"},
            //{list: '.offers-info', discont: ".bonus-amount", price: ".sales-block-offer-price__price-final"},

        ]


        for (const s of selectors) {
            let nodes = document.querySelectorAll(s.list)

            for (const item of nodes) {
                if ('special_price' in item.dataset) {
                    continue;
                }


                let discontNode = item.querySelector(s.discont)
                if (discontNode == null) {
                    continue; // нет в наличии
                }

                let discont = parseInt(discontNode.innerText.replaceAll(" ", ""))
                //discont = discont + discont*0.1

                let priceNode = item.querySelector(s.price)
                if (priceNode == null) {
                    continue;
                }

                let price = parseInt(priceNode.innerText.trim().replaceAll(/[^0-9]/g, ""))
                priceNode.innerHTML = `<small style="color: #999">${priceNode.innerHTML}</small> - <span class="real-price">${price - discont}</span>`

                item.dataset.special_price = true
            }
        }
    }

    const sortNodesByRealPrice = (nodeOffers) => {
        let changeOrder = false
        nodeOffers.sort((a, b) => {
            const priceA = parseInt(a.querySelector(".real-price").innerText)
            const priceB = parseInt(b.querySelector(".real-price").innerText)

            let diff = priceA - priceB
            if (diff === 0) {
                return 0
            }

            changeOrder = true
            return diff
        })

        return changeOrder
    }

    const sortByRealPrice = (selectorList = ".product-offers .product-offer") => {
        let offers = [...document.querySelectorAll(selectorList)]
        if (sortNodesByRealPrice(offers)) {
            offers.forEach(node => {
                node.parentNode.appendChild(node) // move
            });
        }
    }

    //window.addEventListener('load', calculate)
    window.setInterval(calculate, 3000)
    window.setInterval(sortByRealPrice, 4000)

})();