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floodmeadows / Appadmin Google Groups helper

// ==UserScript==
// @name         Appadmin Google Groups helper
// @description  Replies to customers should use the group "from" address. Warn me if it's a different address.
// @namespace    https://openuserjs.org/users/floodmeadows
// @author       floodmeadows
// @copyright    2021, floodmeadows (https://openuserjs.org/users/floodmeadows)
// @license      MIT
// @version      1.0.0
// @include      https://groups.google.com/a/digital.hmrc.gov.uk/g/appadmin/c/*
// @icon         https://www.google.com/s2/favicons?domain=google.com
// @downloadURL  https://openuserjs.org/install/floodmeadows/Appadmin_Google_Groups_helper.user.js
// @updateURL    https://openuserjs.org/meta/floodmeadows/Appadmin_Google_Groups_helper.meta.js
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const fromAddressButtonDelay = 700;
    const replyButtonDelay = 1200;
    const fromAddressClassName = "RdyDwe snByac";
    const replyButtonClassName = "NPEfkd RveJvd snByac";
    const groupAddress = "appadmin@digital.hmrc.gov.uk";
    const alertColour = "#f00";
    const okColour = "#fff";

    document.documentElement.addEventListener("keyup", checkAfterDelay);
    document.documentElement.addEventListener("mouseup", checkAfterDelay);

    function checkAfterDelay() {
        setTimeout(checkFromAddress, fromAddressButtonDelay);
    }

    function checkFromAddress() {
        var fromAddressContainer = document.getElementsByClassName(fromAddressClassName)[0];
        var fromAddress = fromAddressContainer.textContent;
        var fromAddressButton = fromAddressContainer.parentElement.parentElement;
        if(fromAddress != groupAddress) {
            fromAddressButton.style.backgroundColor = alertColour;
        } else {
            fromAddressButton.style.backgroundColor = okColour;
        }
    }

    function makeReplyButtonLookDisabled() {
        var replyButton = document.getElementsByClassName("NPEfkd RveJvd snByac")[1];
        replyButton.parentElement.parentElement.style.textDecoration = "line-through";
        replyButton.parentElement.parentElement.style.backgroundColor = "#ccc";
        replyButton.style.color = "#999";
    }

    // Make the button look disabled as soon as possible ...
    makeReplyButtonLookDisabled();
    // ... and then do it again because something else on the page over-rides the appearance changes after a short delay.
    setTimeout(makeReplyButtonLookDisabled, replyButtonDelay);
})();