Price Rounder

Rounds prices ending in .90 or higher to the nearest whole number. Works on Amazon and most shopping sites I've tested.
Задайце пытанне, пакіньце водгук або паскардзіцеся на скрыпт.
Wrap lines
// ==UserScript==
// @name         Price Rounder
// @namespace    http://tampermonkey.net/
// @version      1.3
// @description  Rounds prices ending in .90 or higher to the nearest whole number. Works on Amazon and most shopping sites I've tested.
// @author       Tempo918
// @match        *://*/*
// @grant        GM_registerMenuCommand
// @grant        GM_getValue
// @grant        GM_setValue
// @license      MIT
// ==/UserScript==

(function () {
    'use strict';

    // === Settings ===
    const isEnabled = GM_getValue('roundingEnabled', true);

    GM_registerMenuCommand(isEnabled ? "Disable Price Rounding" : "Enable Price Rounding", () => {
        GM_setValue('roundingEnabled', !isEnabled);
        location.reload();
    });

    if (!isEnabled) return;

    // === Rounding Logic ===
    function shouldRound(num) {
        return num % 1 >= 0.90;
    }

    function roundPrice(num) {
        return shouldRound(num) ? Math.ceil(num) : num;
    }

    // === Amazon-Specific Handling ===
    function handleAmazonListPage() {
        const elems = document.getElementsByClassName("a-price-fraction");
        for (let i = 0; i < elems.length; i++) {
            const centsElem = elems[i];
            const wholeElem = centsElem.parentNode.querySelector(".a-price-whole");
            if (!wholeElem) continue;

            const price = parseFloat(wholeElem.textContent.replace(/[^\d]/g, '') + '.' + centsElem.textContent);
            const newPrice = roundPrice(price).toFixed(2);
            wholeElem.textContent = newPrice.slice(0, -3);
            centsElem.textContent = newPrice.slice(-2);
        }
    }

    function handleAmazonProductPage() {
        const elems = document.getElementsByClassName("apexPriceToPay");
        for (let i = 0; i < elems.length; i++) {
            const priceElem = elems[i].querySelector("span:nth-child(2)");
            if (!priceElem) continue;

            const price = parseFloat(priceElem.textContent.replace(/[^0-9.]/g, ''));
            priceElem.textContent = "$" + roundPrice(price).toFixed(2);
        }
    }

    // === Generic Price Rounding ===
    const priceRegex = /\b\d{1,3}(?:,\d{3})*(?:\.\d{2})\b/g;

    function isVisible(el) {
        return !!(el.offsetWidth || el.offsetHeight || el.getClientRects().length);
    }

    function roundPricesInNode(node) {
        if (node.nodeType === Node.TEXT_NODE && node.parentElement && isVisible(node.parentElement)) {
            const originalText = node.textContent;
            const newText = originalText.replace(priceRegex, match => {
                const num = parseFloat(match.replace(/,/g, ''));
                return shouldRound(num) ? Math.ceil(num).toString() : match;
            });
            if (newText !== originalText) {
                node.textContent = newText;
            }
        }
    }

    function scanPage() {
        const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT, null, false);
        let node;
        while ((node = walker.nextNode())) {
            roundPricesInNode(node);
        }
    }

    // === Observe Dynamic Changes ===
    function observeMutations() {
        const observer = new MutationObserver(mutations => {
            for (const mutation of mutations) {
                mutation.addedNodes.forEach(node => {
                    if (node.nodeType === Node.TEXT_NODE) {
                        roundPricesInNode(node);
                    } else if (node.nodeType === Node.ELEMENT_NODE) {
                        node.querySelectorAll('*').forEach(el => {
                            el.childNodes.forEach(roundPricesInNode);
                        });
                    }
                });
            }
        });

        observer.observe(document.body, {
            childList: true,
            subtree: true
        });
    }

    // === Run Script ===
    window.addEventListener('load', () => {
        handleAmazonProductPage();
        handleAmazonListPage();
        scanPage();
        observeMutations();

        setInterval(() => {
            handleAmazonListPage();
        }, 2000);
    });
})();