NHentai PervertMonkey

Infinite scroll [optional], Filter by Title
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// ==UserScript==
// @name         NHentai PervertMonkey
// @namespace    pervertmonkey
// @version      4.0.0
// @author       violent-orangutan
// @description  Infinite scroll [optional], Filter by Title
// @license      MIT
// @icon         https://www.google.com/s2/favicons?sz=64&domain=nhentai.net
// @homepage     https://github.com/smartacephale/sleazy-fork
// @homepageURL  https://github.com/smartacephale/sleazy-fork
// @source       github:smartacephale/sleazy-fork
// @supportURL   https://github.com/smartacephale/sleazy-fork/issues
// @match        https://*.nhentai.*/*
// @match        https://*.nhentai.net/*
// @require      https://cdn.jsdelivr.net/npm/[email protected]/dist/core/pervertmonkey.core.umd.js
// @require      data:application/javascript,var core = window.pervertmonkey.core || pervertmonkey.core; var utils = core;
// @grant        GM_addStyle
// @grant        unsafeWindow
// @run-at       document-idle
// ==/UserScript==

(function (core, utils) {
  'use strict';

  const IS_TITLE_PAGE = /^\/g\/\d+/.test(location.pathname);
  const IS_SEARCH_PAGE = /^\/search\//.test(location.pathname);
  const nhentaiRules = new core.RulesGlobal({
    getThumbImgDataAttrDelete: "auto",
    getThumbImgDataStrategy: "auto",
    thumbsSelector: ".gallery",
    containerSelectorLast: ".index-container, .container",
    titleSelector: ".caption",
    customDataSelectorFns: ["filterInclude", "filterExclude"],
    schemeOptions: ["Text Filter", "Badge", "Advanced"],
    gropeStrategy: "all-in-all"
  });
  const filterDescriptors = {
    english: { query: "english", name: "🇬🇧" },
    japanese: { query: "japanese", name: "🇯🇵" },
    chinese: { query: "chinese", name: "🇨🇳" },
    gay: { query: "-gay", name: "Exclude Gay" },
    fullColor: { query: "color", name: "Full Color" }
  };
  function checkURL(url_) {
    return Object.keys(filterDescriptors).reduce((url, k) => {
      const q = filterDescriptors[k].query;
      return nhentaiRules.store.state.custom[k] ? url.includes(q) ? url : `${url}+${q}` : url.replace(`+${q}`, () => "");
    }, url_);
  }
  function filtersUI() {
    const state = nhentaiRules.store.state;
    const btnContainer = Array.from(document.querySelectorAll(".sort-type")).pop();
    const descs = Array.from(Object.keys(filterDescriptors));
    [descs.slice(0, 3), [descs[3]], [descs[4]]].forEach((groupOfButtons) => {
      const btns = utils.parseHtml(`<div class="sort-type"></div>`);
      groupOfButtons.forEach((k) => {
        const btn = utils.parseHtml(
          `<a href="#" ${state.custom[k] ? 'style="background: rgba(59, 49, 70, 1)"' : ""}>${filterDescriptors[k].name}</a>`
        );
        btn.addEventListener("click", (e) => {
          e.preventDefault();
          state.custom[k] = !state.custom[k];
          location.href = checkURL(location.href);
        });
        btns.append(btn);
      });
      btnContainer?.after(btns);
    });
    const fixedURL = checkURL(location.href);
    if (location.href !== fixedURL) location.href = checkURL(location.href);
  }
  function findSimilar() {
    let tags = Array.from(
      document.querySelectorAll('.tags .tag[href^="/tag/"] .name')
    ).map((tag) => tag.innerText).join(" ").split(" ");
    tags = Array.from(new Set(tags)).sort((a, b) => a.length - b.length);
    const urls = {
      searchSimilar: `/search/?q=${tags.slice(0, 5).join("+")}`,
      searchSimilarLess: `/search/?q=${tags.reverse().slice(0, 5).join("+")}`
    };
    Object.keys(urls).forEach((url) => {
      urls[url] = checkURL(urls[url]);
    });
    Array.from(document.links).filter(
      (l) => /\/(search|category|tag|character|artist|group|parody)\/\w+/.test(l.href)
    ).forEach((l) => {
      l.href = checkURL(
        l.href.replace(/(search|category|tag|character|artist|group|parody)\//, "search/?q=").replace(/\/$/, "")
      );
    });
    document.querySelector(".buttons")?.append(
      utils.parseHtml(
        `<a href="${urls.searchSimilar}" class="btn" style="background: rgba(59, 49, 70, 1)"><i class="fa fa-search"></i> Similar</a>`
      ),
      utils.parseHtml(
        `<a href="${urls.searchSimilarLess}" class="btn" style="background: rgba(59, 49, 70, .9)"><i class="fa fa-search"></i> Less Similar</a>`
      )
    );
  }
  function route() {
    if (!nhentaiRules.store.state.custom) {
      const custom = Object.entries(filterDescriptors).reduce(
        (acc, [k, _]) => {
          acc[k] = false;
          return acc;
        },
        {}
      );
      Object.assign(nhentaiRules.store.state, { custom });
    }
    if (IS_TITLE_PAGE) {
      findSimilar();
    }
    if (IS_SEARCH_PAGE) {
      filtersUI();
    }
  }
  route();

})(core, utils);