// ==UserScript==
// @name                highlight-my-interest
// @name:zh-CN          高亮关键词
// @description         highlight keywords in my favorites
// @description:zh-CN   高亮特定网页中感兴趣的关键词
// @version             0.1.7
// @author              jferroal
// @license             GPL-3.0
// @grant               none
// @include             https://sspai.com/*
// @include             https://toutiao.io/*
// @include             http://www.inoreader.com/*
// @include             http://www.52pojie.cn/*
// @run-at              document-end
// @namespace           https://greasyfork.org/users/34556-jferroal
// @downloadURL none
// ==/UserScript==

const JFInterestedKeywords = [
  /.*书籍.*/,
  /.*效率.*/gi,
  /.*google.*/gi,
  /.*Nexus.*/gi,
  /.*爬虫.*/,
  /.*python.*/gi,
  /.*angular.*/gi,
  /.*node.*/gi,
  /.*javascript.*/gi,
  /.*ukulele.*/gi,
  /.*GTD.*/gi,
  /.*工作流.*/gi,
  /.*日程.*/gi,
  /.*英雄联盟.*/gi,
  /.*VPS.*/gi,
  /.*服务器.*/gi,
  /.*书单.*/gi,
  /.*免费.*/gi,
  /.*限免.*/gi,
  /.*数据分析.*/gi,
  /.*自由职业.*/gi
];

let alreadyLoadedTimes = 0;

function getElements() {
  const targetTagNames = ['h1', 'h2', 'h3', 'h4', 'h5', 'p', 'a', 'pre', 'blockquote', 'summary'];
  return targetTagNames.reduce((res, tagName) => {
    const tags = document.getElementsByTagName(tagName);
    if (tags && tags.length) {
      res.push(...tags);
    }
    return res;
  }, []);
}

function matchKeywordsInElements() {
  const elements = getElements();
  elements.forEach((element) => {
    JFInterestedKeywords.forEach((keyword) => {
      const isMatched = keyword.test(element.innerText);
      if (isMatched) {
        element.style.backgroundColor = '#FFDA5E';
        element.style.color = 'black';
      }
    });
  });
  alreadyLoadedTimes += 1;
}
const autoMatchInterval = setInterval(() => {
  if (alreadyLoadedTimes < 100) {
    matchKeywordsInElements();
  } else {
    clearInterval(autoMatchInterval);
    console.log('will no match any more');
  }
}, 1000);