delete evn.user.js

// ==UserScript==
// @name        Delete EVNs
// @namespace   Violentmonkey Scripts
// @match       https://vndb.org/g*
// @match       https://vndb.org/v*
// @grant       none
// @version     1.1
// @author      Marv
// @description filters out vns that don't have jp language (mostly EVNs). doesn't filter titles that aren't jp and got a jp release.
// ==/UserScript==

const japaneseRegex = /[一-龯ぁ-んァ-ンｧ-ﾝﾞﾟ０-９Ａ-ｚぁ-ゞァ-ヶｦ-ﾟ]+/;
let delayMs = 500;

const addDiv = (evnsDeleted, total) =>
  /* html */ `<div class='elm_dd'><a id="toggleEVNs">deleted ${evnsDeleted} evns of ${total}</a></div>`;

const types = {
  rows: {
    vnSelector: 'tbody > tr',
    titleSelector: 'td.tc_title > a[title]',
  },
  cards: {
    vnSelector: '.mainbox > div',
    titleSelector: 'a[title]',
  },
  grid: {
    vnSelector: '.mainbox > div',
    titleSelector: 'a[title] > span',
  },
};

let type = types.rows;

(async function () {
  // filter out vn pages
  if (document.URL.match('https://vndb.org/v') && document.URL.match(/vndb\.org\/v\d+/)) {
    return;
  }
  console.log('deleting EVNs');
  let evns = [];

  let rows = document.querySelector('.mainbox.browse.vnbrowse');
  let cards = document.querySelector('.mainbox.vncards');
  let grid = document.querySelector('.mainbox.vngrid');

  let vnBox;

  if (rows) {
    type = types.rows;
    vnBox = rows;
  } else if (cards) {
    type = types.cards;
    vnBox = cards;
  } else if (grid) {
    type = types.grid;
    vnBox = grid;
  }

  console.log(vnBox, type);

  let vnElems = [...vnBox.querySelectorAll(type.vnSelector)];
  vnElems.forEach((vnElem) => {
    if (checkEVN(vnElem)) {
      evns.push(vnElem);
      toggleVisibility([vnElem]);
    }
  });
  let insertBefore = document.querySelector('.maintabs.browsetabs');
  insertBefore.insertBefore(
    elementFromHTML(addDiv(evns.length, vnElems.length)),
    insertBefore.firstChild
  );
  // vnBox.appendChild(elementFromHTML(addDiv(evns.length)));
  document.getElementById('toggleEVNs').addEventListener('click', () => {
    toggleVisibility(vnElems);
  });
})();

function toggleVisibility(elements) {
  elements.forEach((elem) => {
    elem.style.display = elem.style.display == 'none' ? '' : 'none';
  });
}

function elementFromHTML(html) {
  let element = document.createElement('div');
  element.innerHTML = html;
  return element.firstChild;
}

// returns true if the elem doesnt have a jp flag
function checkEVN(vnElem) {
  let flagElems = [...vnElem.querySelectorAll('abbr.lang')];
  let vnTitle = vnElem.querySelector(type.titleSelector).innerText;
  if (!flagElems.some((elem) => elem.title == 'Japanese')) {
    if (flagElems.length >= 1) return true;
  }
  if (japaneseRegex.test(vnTitle)) {
    return false;
  }
  return false;
}