scrapbox.PopupMenu.addButton({
  title : 'Embed Tweet',
  onClick : text => {
    const convertContent = content => {
      const replaced = content
        .replace(/<a href="(https?:.*?)">(.*?)<\/a>/g, '[$1 $2]')
        .replace(/<br>/g, '\n>');
      const elem = document.createElement('div');
      elem.innerHTML = replaced;
      return elem.innerText;
    }
    const tweetRegex = /<blockquote[\w"\-= ]*><p[\w"\-= ]*>(?<content>.*)<\/p>&mdash;(?<author>.*)(?<link><a.*>)<\/blockquote>/;
    const match = text.match(tweetRegex);
    if(!match) return;
    const {content, author, link} = match.groups;
    return text.replace(tweetRegex, `>${convertContent(content)}\n>\t—${author} ${convertContent(link)}`);
  }
})
