Goodreads Plus

Add "Search MAM" button to Goodreads
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// ==UserScript==
// @name         Goodreads Plus
// @namespace    https://greasyfork.org/en/users/78880
// @version      0.3.13
// @description  Add "Search MAM" button to Goodreads
// @author       Slengpung
// @match        https://www.goodreads.com/*
// @grant        none
// @license      MIT
// ==/UserScript==

window.addEventListener("load", Greasemonkey_main, false);
 
function Greasemonkey_main() {
 
    console.log("[G+] Tweaking Goodreads...");
 
    var page = window.location.pathname.split('/')[1];
    var mamSearchUrl = "";
    var buttonBar = "";
    var mamButton = "";
    var buttonUl = "";
    var bookTitle = "";
 
    if(page === 'book'){
        console.log("[G+] We got a book URL");

        // Try different ways to grab book title
        try {
            bookTitle = document.getElementsByClassName("Text__title1")[0].innerHTML;
        }
        catch {
            bookTitle = document.getElementById("bookTitle").innerText;
        }
        finally {
            console.log("[G+] Book title: " + bookTitle);
            bookTitle = bookTitle.replace('&amp;', '%26');
            bookTitle = bookTitle.replace('&', '%26');
        }
        
        mamSearchUrl = "https://www.myanonamouse.net/tor/browse.php?tor[text]=" + bookTitle;
 
        // Add 'Search MAM' button
        // Old or new layout?
        var old = document.getElementById("buyButtonContainer");
        if(old != null) {
            console.log("[G+] Old layout");
            buttonBar = document.getElementById("buyButtonContainer");
        	if (buttonBar === null || buttonBar == "null") {
        		buttonBar = document.getElementById("asyncBuyButtonContainer");
        	}
        	buttonUl = buttonBar.getElementsByTagName("ul");
        	mamButton = document.createElement("li");
        	mamButton.innerHTML = '<a id="mamLink" href="' + mamSearchUrl + '" target="_blank" class="buttonBar">Search MAM</a>';
        	mamButton.className = "Button";
        	buttonUl[0].appendChild(mamButton);
        	console.log("[G+] 'Search MAM' button added!");
        }
        else {
            console.log("[G+] New layout");
            buttonBar = document.getElementsByClassName("BookActions")[0];
            mamButton = document.getElementsByClassName("BookActions__button")[0].cloneNode(true);
            mamButton.innerHTML = '<div class="BookActions__button"><a href="' + mamSearchUrl + '">' +
                '<div class="Button__container Button__container--block">' +
                '<button type="button" class="Button Button--secondary Button--medium Button--block">' +
                '<span class="Button__labelItem" style="text-decoration=none">Search MAM</span></button></div></a></div>';
     
            buttonBar.appendChild(mamButton)
            console.log("[G+] 'Search MAM' button added!");
        }
    } else if(page === 'review'){
        var bookList = document.querySelectorAll('#booksBody .title div a');
        // Loop over all the books
        for(var i=0; i<bookList.length; i++){
            bookTitle = getBookTitle(bookList[i]);
            bookTitle = bookTitle.replace('&amp;', '%26');
            bookTitle = bookTitle.replace('&', '%26');
            mamSearchUrl = "https://www.myanonamouse.net/tor/browse.php?tor[text]=" + bookTitle;
            // Add 'Search MAM' button
            var newLink = document.createElement('a');
            var linkText = document.createTextNode('[Search MAM]');
            newLink.appendChild(linkText);
            newLink.setAttribute('href',mamSearchUrl);
            newLink.setAttribute('style','color:#b3b3b3;font-style:italic');
            bookList[i].parentNode.parentNode.appendChild(newLink);
        }
        console.log("[G+] 'Search MAM' buttons added!");
    }
 
}
 
// Grab book title (and only title) from the element
function getBookTitle(el){
	var bookTitle = el.innerHTML.trim().split('<', 1)+'';
	console.log("Book title: " + bookTitle.trim());
	return bookTitle.trim();
}