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Gelbooru "Index" Button

Adds an "Index" button on post pages, allowing you to return to a search starting from the ID of the current post you're on

  1. // ==UserScript==
  2. // @name         Gelbooru "Index" Button
  3. // @namespace    https://gelbooru.com/
  4. // @version      1.0
  5. // @description  Adds an "Index" button on post pages, allowing you to return to a search starting from the ID of the current post you're on
  6. // @match        https://gelbooru.com/index.php?page=post&s=view*
  7. // @icon         https://gelbooru.com/favicon.ico
  8. // @grant        none
  9. // @license MIT
  10. // ==/UserScript==
  11.  
  12. (function() {
  13.     'use strict';
  14.  
  15.     if (location.hostname !== 'gelbooru.com') return;
  16.  
  17.     const url = new URL(window.location.href);
  18.     const urlParams = url.searchParams;
  19.  
  20.     const currentId = urlParams.get('id');
  21.     if (!currentId) return; // If no post ID, do nothing
  22.  
  23.     urlParams.delete('id');
  24.     urlParams.set('s', 'list');
  25.  
  26.     const rawTags = urlParams.get('tags') || '';
  27.     let decodedTags = decodeURIComponent(rawTags);
  28.  
  29.     const newIdSearch = 'id:=<' + currentId;
  30.  
  31.     const idSearchRegex = /id:=<\d+/i;
  32.     if (idSearchRegex.test(decodedTags)) {
  33.         decodedTags = decodedTags.replace(idSearchRegex, newIdSearch);
  34.     } else {
  35.         decodedTags = decodedTags.trim();
  36.         if (decodedTags) decodedTags += ' ';
  37.         decodedTags += newIdSearch;
  38.     }
  39.  
  40.     urlParams.set('tags', decodedTags.trim());
  41.  
  42.     const finalUrl = `${url.origin}${url.pathname}?${urlParams.toString()}`;
  43.  
  44.     const box = document.createElement('div');
  45.     box.className = 'alert alert-info';
  46.     box.style.textAlign = 'center';
  47.     box.style.margin = '10px 0px';
  48.     box.style.padding = '10px';
  49.  
  50.     const indexLink = document.createElement('a');
  51.     indexLink.textContent = 'Index';
  52.     indexLink.href = finalUrl;
  53.  
  54.     box.appendChild(indexLink);
  55.  
  56.     const navContainers = document.querySelectorAll('.alert.alert-info');
  57.     if (navContainers.length > 0) {
  58.         navContainers[navContainers.length - 1].insertAdjacentElement('afterend', box);
  59.     } else {
  60.         const mainBody = document.querySelector('.mainBodyPadding');
  61.         if (mainBody) mainBody.appendChild(box);
  62.     }
  63. })();