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Open in Goodreads

Adds a button to Amazon book pages to redirect to Goodreads page based on ASIN/ISBN

  1. // ==UserScript==
  2. // @name         Open in Goodreads
  3. // @namespace    open-in-goodreads
  4. // @version      2.4
  5. // @description  Adds a button to Amazon book pages to redirect to Goodreads page based on ASIN/ISBN
  6. // @match        https://*.amazon.com/*
  7. // @match        https://*.amazon.co.uk/*
  8. // @match        https://*.amazon.com.au/*
  9. // @match        https://*.amazon.com.be/*
  10. // @match        https://*.amazon.com.br/*
  11. // @match        https://*.amazon.ca/*
  12. // @match        https://*.amazon.cn/*
  13. // @match        https://*.amazon.eg/*
  14. // @match        https://*.amazon.fr/*
  15. // @match        https://*.amazon.de/*
  16. // @match        https://*.amazon.in/*
  17. // @match        https://*.amazon.it/*
  18. // @match        https://*.amazon.co.jp/*
  19. // @match        https://*.amazon.com.mx/*
  20. // @match        https://*.amazon.nl/*
  21. // @match        https://*.amazon.pl/*
  22. // @match        https://*.amazon.sa/*
  23. // @match        https://*.amazon.sg/*
  24. // @match        https://*.amazon.es/*
  25. // @match        https://*.amazon.se/*
  26. // @match        https://*.amazon.com.tr/*
  27. // @match        https://*.amazon.ae/*
  28. // @grant        none
  29. // @license MIT
  30. // ==/UserScript==
  31.  
  32. (function () {
  33.     'use strict';
  34.  
  35.     function redirectToGoodreads() {
  36.         var asinElements = document.getElementsByName('ASIN');
  37.         if (asinElements.length === 0) asinElements = document.getElementsByName('ASIN.0');
  38.  
  39.         if (asinElements.length > 0) {
  40.             const asin = asinElements[0].value;
  41.             const goodreadsUrl = asin.match(/\D/) === null
  42.                 ? `http://www.goodreads.com/review/isbn/${asin}`
  43.                 : `https://www.goodreads.com/book/isbn?isbn=${asin}`;
  44.             window.open(goodreadsUrl, '_blank');
  45.         } else {
  46.             alert("No ASIN or ISBN Found.");
  47.         }
  48.     }
  49.  
  50.     function addButton() {
  51.         const imageBlockNew = document.getElementById('imageBlockNew_feature_div');
  52.         const imageBlock = document.getElementById('imageBlock_feature_div');
  53.         const booksImageBlock = document.getElementById('booksImageBlock_feature_div');
  54.  
  55.         // Only add button if one of the target image blocks is present
  56.         if (imageBlockNew || booksImageBlock || imageBlock) {
  57.             // Check for Publication date in the carousel section
  58.             const carousel = document.querySelector('.a-carousel');
  59.             const publicationDateExists = carousel && carousel.innerText.includes('Publication date');
  60.  
  61.             if (publicationDateExists) {
  62.                 const button = document.createElement('button');
  63.                 button.innerText = 'Open in Goodreads';
  64.                 button.style.cssText = `
  65.                     margin: 10px auto;
  66.                     display: block;
  67.                     color: #ffffff;
  68.                     background-color: #377458;
  69.                     border: none;
  70.                     border-radius: 4px;
  71.                     padding: 8px 12px;
  72.                     font-family: Arial, sans-serif;
  73.                     font-size: 14px;
  74.                     font-weight: bold;
  75.                     cursor: pointer;
  76.                 `;
  77.                 button.onclick = redirectToGoodreads;
  78.  
  79.                 const centerDiv = document.createElement('div');
  80.                 centerDiv.style.textAlign = 'center';
  81.                 centerDiv.appendChild(button);
  82.  
  83.                 // Insert the button after the image block
  84.                 if (imageBlockNew) imageBlockNew.parentNode.insertBefore(centerDiv, imageBlockNew.nextSibling);
  85.                 else if (booksImageBlock) booksImageBlock.parentNode.insertBefore(centerDiv, booksImageBlock.nextSibling);
  86.                 else if (imageBlock) imageBlock.parentNode.insertBefore(centerDiv, imageBlock.nextSibling);
  87.             }
  88.         }
  89.     }
  90.  
  91.     // Observer to detect when the target elements are available
  92.     const observer = new MutationObserver(() => {
  93.         const imageBlockNew = document.getElementById('imageBlockNew_feature_div');
  94.         const imageBlock = document.getElementById('imageBlock_feature_div');
  95.         const booksImageBlock = document.getElementById('booksImageBlock_feature_div');
  96.  
  97.         if (imageBlockNew || booksImageBlock || imageBlock) {
  98.             addButton();
  99.             observer.disconnect(); // Stop observing once the button is added
  100.         }
  101.     });
  102.  
  103.     // Start observing for changes in the DOM
  104.     observer.observe(document.body, { childList: true, subtree: true });
  105. })();