redirect Facebook, YouTube, GitHub, Medium, HackMD

main.js

(() => {
  const redirectMatchers = [
    {
      matcher: () => location.host.includes('slideshare.net'),
      action: redirectSlideShare
    },
    {
      matcher: () => location.host.includes('facebook'),
      action: redirectFacebook
    },
    {
      matcher: () => location.host.includes('youtube'),
      action: redirectYouTube
    },
    {
      matcher: () => location.host.includes('github'),
      action: redirectGitHub
    },
    {
      matcher: function isMediumLike() {
        const selector = 'meta[property="og:site_name"][content="Medium"]';
        const metaElement = document.head.querySelector(selector);
        return !!metaElement;
      },
      action: redirectMedium
    },
    {
      matcher: () => location.host.includes('hackmd'),
      action: redirectHackMD
    }
  ];

  for (const { matcher, action } of redirectMatchers) {
    const isMatch = matcher();
    if (isMatch) {
      action();
      break;
    }
  }

  /* redirect Facebook mobile page <--> desktop page */
  function redirectFacebook() {
    if (location.host === 'm.facebook.com') {
      location.href = 'https://www.facebook.com' + location.pathname + location.search;
    } else if (location.host === 'www.facebook.com') {
      location.href = 'https://m.facebook.com' + location.pathname + location.search;
    }
  }

  /* redirect YouTube Shorts --> normal vedio page */
  function redirectYouTube() {
    const vedioId = location.pathname.split('/').at(-1);
    location.href = `${location.origin}/watch?v=${vedioId}`;
  }

  /* redirect GitHub page <--> GitHub repo page */
  function redirectGitHub() {
    if (location.hostname === 'github.com') {
      const [_, username, repo] = location.pathname.split('/');
      if (location.pathname.split('/')[2] === `${username}.github.io`) {
        location.href = `https://${username}.github.io/`;
      } else {
        location.href = `https://${username}.github.io/${repo}`;
      }
    } else if (location.hostname.includes('github.io')) {
      const username = location.host.split('.')[0];
      const repo = location.pathname === '/'
        ? location.host
        : location.pathname.split('/')[1];
      location.href = `https://github.com/${username}/${repo}`;
    }
  }

  /* redirect Medium --> scribe.rip */
  function redirectMedium() {
    location.href = 'https://freedium.cfd/' + location.href + location.pathname;
    /* location.href = 'https://readmedium.com/zh' + location.pathname; */
    /* location.href = 'https://scribe.rip' + location.pathname; */
  }

  function redirectSlideShare() {
    location.href = 'https://sssslide.com/' + location.href;
  }

  function redirectHackMD() {
    location.href = 'https://hackmd.io/' + window.NOTE_ID;
  }
})();