// ==UserScript==
// @name         Amazon stars rating
// @namespace    V@no
// @author       V@no
// @description  Restore stars rating on Amazon product pages
// @include      https://amazon.*/*
// @include      https://*.amazon.*/*
// @license      MIT
// @version      1.0.2
// @run-at       document-start
// @grant        none
// ==/UserScript==
//tab = 4 spaces
(() =>
{
"use strict";
const processNode = node =>
{
if (!node.querySelectorAll) return;
const nlSingleStar = node.querySelectorAll(".puis-review-star-single");
for (let i = 0; i < nlSingleStar.length; i++)
{
const el = nlSingleStar[i];
const ratingFull = el.textContent; //4.6 out of 5 stars
const rating = ratingFull.split("."); //["4", "6 out of 5 stars"]
rating[1] = rating[1][0]; //discard everything after first digit
if (rating[1] > 6 && rating[0] < 4)
rating[0] = ++rating[0];
const stars = rating[0] + (rating[1] > 2 && rating[1] < 8 ? "-5" : "");
el.classList.remove("puis-review-star-single", "a-star-small-5");
el.classList.add("a-star-small-" + stars);
//rating count
const elRatingCount = el.closest(".a-section").querySelector(".a-size-base.s-underline-text");
if (!elRatingCount.textContent)
{
const elRatingCountBox = elRatingCount.closest("[aria-label]");
elRatingCount.textContent = elRatingCountBox.ariaLabel;
const elFiveStarPercent = elRatingCountBox.nextSibling.firstChild.firstChild;
elFiveStarPercent.nodeValue = "(" + elFiveStarPercent.nodeValue + ")";
}
}
};
//support for dynamically added content
new MutationObserver(mutations =>
{
for (let i = 0; i < mutations.length; i++)
{
const addedNodes = mutations[i].addedNodes;
if (!addedNodes) continue;
for (let j = 0; j < addedNodes.length; j++)
processNode(addedNodes[j]);
}
}).observe(document, { childList: true, subtree: true });
})();