// ==UserScript==
// @name        NGA 自动查成分
// @description 在 nga 的用户页上显示用户分别在哪些版面发言了多少次
// @license MIT
// @match       *://bbs.nga.cn/nuke.php*
// @match       *://nga.178.com/nuke.php*
// @match       *://ngabbs.com/nuke.php*
// @version     0.1
// @grant       none
// @namespace https://greasyfork.org/users/1096435
// @downloadURL none
// ==/UserScript==

const blobToBase64 = blob => new Promise(resolve => {
  const reader = new FileReader();
  reader.onloadend = () => resolve(reader.result);
  reader.readAsText(blob, 'GBK');
});
const wait = selector => new Promise(resolve => {
  const id = window.setInterval(() => {
    const dom = document.querySelector(selector);
    if (!dom) return;
    window.clearInterval(id);
    resolve();
  }, 100);
});
(async () => {
  await wait('#ucp_block > span');
  const dom = document.createElement('span');
  dom.innerHTML = `
    <h2 class=" catetitle">
      :: 成分 ::
      <img src="about:blank" style="display: none;">
    </h2>
    <div class=" cateblock" id="ucpuser_sign_blockContent" style="text-align: left; line-height: 1.8em;">
      <div class="contentBlock" style="padding: 5px 10px;">
        <span><div id="blood" style="margin: 0.25em 0px;"></div></span>
        <div class=" clear"></div>
      </div>
    </div>
  `;
  document.querySelector('#ucp_block > span').append(dom);
  const frequency = {};
  const show = () => {
    document.querySelector('#blood').innerHTML = Object.entries(frequency).sort(([, a], [, b]) => b - a).map(([name, num]) => `<p>${name}: ${num}</p>`).join('');
  };
  const params = new URLSearchParams(window.location.search);
  const aid = params.get('authorid') ?? params.get('uid');
  const work = async page => {
    const res = await fetch(`/thread.php?searchpost=1&authorid=${aid}${page ? `&page=${page}` : ''}`);
    const html = await blobToBase64(await res.blob());
    html.match(/(?<=\?fid=.+?['"] class=['"]silver['"]>\[).+?(?=\]<\/a>)/g)?.forEach(fname => {
      if (!Reflect.has(frequency, fname)) frequency[fname] = 1;else frequency[fname] += 1;
    });
    show();
    const nextPage = html.match(/(?<=page=)\d+(?=['"] title=['"]可能有下一页)/);
    if (nextPage?.[0]) return work(nextPage[0]);
  };
  work();
})();