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Show Amazon Questions button + Show Amazon Questions context menu

Creates a "Show questions" button next to the "answered questions" text, if any. Once pressed it opens a new tab of the questions.

当前为 2023-11-23 提交的版本，查看 最新版本。

// ==UserScript==
// @name     Show Amazon Questions button + Show Amazon Questions context menu
// @author   u/iNeedAProperAccount
// @description Creates a "Show questions" button next to the "answered questions" text, if any. Once pressed it opens a new tab of the questions.
//              It also creates a "Open questions tab" context menu entry.
//              Thanks to u/CaptSkinny, u/lilgeeky, u/Sanpete_in_Utah and u/TTum.
//              How it looks like: https://i.imgur.com/XJYWiQ4.png
//              Original thread at: https://old.reddit.com/r/AmazonVine/comments/14aynxt/are_product_question_and_answer_sections_gone/
// @version  0.1
// @license  MIT License
// @match    *://*.amazon.com/*
// @match    *://*.amazon.ca/*
// @match    *://*.amazon.com.mx/*
// @match    *://*.amazon.co.uk/*
// @match    *://*.amazon.fr/*
// @match    *://*.amazon.de/*
// @match    *://*.amazon.es/*
// @match    *://*.amazon.it/*
// @match    *://*.amazon.nl/*
// @match    *://*.amazon.be/*
// @match    *://*.amazon.lu/*
// @match    *://*.amazon.se/*
// @match    *://*.amazon.pl/*
// @match    *://*.amazon.com.tr/*
// @match    *://*.amazon.ae/*
// @match    *://*.amazon.sa/*
// @match    *://*.amazon.co.jp/*
// @match    *://*.amazon.in/*
// @match    *://*.amazon.sg/*
// @match    *://*.amazon.com.au/*
// @match    *://*.amazon.com.br/*
// @icon     https://www.google.com/s2/favicons?sz=64&domain=amazon.ca
// @grant    GM_registerMenuCommand
// @namespace https://greasyfork.org/users/877912
// ==/UserScript==

GM_registerMenuCommand("Open Questions tab", contextOpenQuestionsTab, "q");

const ASK_LINK_ID = "askATFLink";
const REGEX_PATTERN = "^(http[s]?://[^/]+)/(?:.+?/)?(?:dp|gp/product|asin)/(?:.+?/)?([a-zA-Z0-9]{10})(?:[/?]|$)";

function getQuestionsUrl() {
    const url = document.URL;
    const regex = new RegExp(REGEX_PATTERN, "i");
    const matches = url.match(regex);

    if (matches) {
        const scheme_and_host = matches[1];
        const asin = matches[2];
        if (scheme_and_host && asin) {
            return `${scheme_and_host}/ask/questions/asin/${asin}`;
        }
    }
}

function contextOpenQuestionsTab() {
    const questions_url = getQuestionsUrl();
    if (questions_url) {
        window.open(questions_url, '_blank');
    }
};

function openQuestionsTab() {
    const questions_url = getQuestionsUrl();

    if (questions_url) {
        const askATFLink = document.getElementById(ASK_LINK_ID);
        if (askATFLink) {
            const button = document.createElement("button");
            button.innerHTML = "Show Questions";
            button.addEventListener("click", function () {
                window.open(questions_url, '_blank');
            });

            askATFLink.parentNode.insertBefore(button, askATFLink.nextSibling);
        }
    }
}

const observer = new MutationObserver(function (mutations) {
    mutations.forEach(function (mutation) {
        if (mutation.type === 'childList' && mutation.addedNodes.length > 0) {
            for (let i = 0; i < mutation.addedNodes.length; i++) {
                const addedNode = mutation.addedNodes[i];
                if (addedNode.id === ASK_LINK_ID) {
                    openQuestionsTab();
                    break;
                }
            }
        }
    });
});

const observerConfig = {
    childList: true,
    subtree: true
};

observer.observe(document.body, observerConfig);

openQuestionsTab();