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Random Page and Gallery for exhentai

adds random page and random gallery buttons to search pages

  1. // ==UserScript==
  2. // @name         Random Page and Gallery for exhentai
  3. // @namespace    http://exhentai.org/
  4. // @version      1.1
  5. // @description  adds random page and random gallery buttons to search pages
  6. // @author       sllypper
  7. // @include      *://exhentai.org/*
  8. // @include      *://g.e-hentai.org/*
  9. // @grant        none
  10. // ==/UserScript==
  11.  
  12. // Options:
  13.  
  14. let openGalleryOnNewTab = true;
  15.  
  16. //
  17.  
  18. function onlyUnique(value, index, self) {
  19.     return self.indexOf(value) === index;
  20. }
  21.  
  22. function openRandGal() {
  23.     let gals = Array.from(document.getElementsByClassName('itg')[0].getElementsByTagName('a')).filter(gal => gal.href.includes('/g/'));
  24.     // gals = gals.filter(onlyUnique);
  25.     window.open(gals[parseInt(Math.floor(Math.random() * gals.length - 1))].href, openGalleryOnNewTab ? '_blank' : '_parent');
  26. }
  27.  
  28. function getRandPageNum() {
  29.     let pageButtons = document.getElementsByClassName('ptt')[0].firstChild.firstChild.children;
  30.     let numPages = pageButtons[pageButtons.length - 2].firstChild.text;
  31.     return parseInt((numPages * Math.random()) - 1);
  32. }
  33.  
  34. function openRandPage() {
  35.     let pageNum = getRandPageNum();
  36.     let url = Array.from(document.getElementsByClassName('ptt')[0].getElementsByTagName('a')).find(el => el.href.includes('page'));
  37.     if (url) {
  38.         url = url.href.replace(/(page=)\d+(&)/, '$1' + pageNum + '$2');
  39.         window.open(url, '_parent');
  40.     }
  41. }
  42.  
  43. (function(){
  44.     let isFavorites = location.href.indexOf('favorites') > 0;
  45.     let place;
  46.     let style = '';
  47.  
  48.     if (!isFavorites) {
  49.         // on the main page
  50.         place = document.getElementsByClassName('nopm');
  51.         place = place[place.length - 1];
  52.         style = 'float: right;'
  53.     } else {
  54.         // on the Favorites page
  55.         place = document.getElementsByClassName('ip')[0];
  56.     }
  57.  
  58.     let template = `<div id="randomStuff" style="${style}">
  59.   <a id="randGalLink" href="#">Random Gallery</a> &nbsp; &nbsp;
  60.   <a id="randPageLink" href="#">Random Page</a>
  61. </div>`;
  62.  
  63.     place.innerHTML = !isFavorites ? place.innerHTML + template : template + place.innerHTML;
  64.  
  65.     var myLink = document.getElementById("randGalLink");
  66.     myLink.addEventListener("click", openRandGal, true);
  67.     
  68.     var myPageLink = document.getElementById("randPageLink");
  69.     myPageLink.addEventListener("click", openRandPage, true);
  70.     
  71. })();