apollo-elements/apollo-elements

import sanitizeHTML from 'sanitize-html';

const hasRequiredFields = entry => {
  const { author, published, content } = entry;
  return author.name && published && content;
};

const sanitize = entry => {
  const { content } = entry;
  if (content['content-type'] === 'text/html')
    content.value = sanitizeHTML(content.value);

  return entry;
};

export function getWebmentionsForUrl(mentions, url) {
  const webmentions =
      Array.isArray(mentions) ? mentions
    : (mentions?.children ?? []);
  const likes = ['like-of'];
  const retweet = ['repost-of'];
  const messages = ['mention-of', 'in-reply-to'];

  return {
    'likes': webmentions
      .filter(entry => entry['wm-target'] === url)
      .filter(entry => likes.includes(entry['wm-property'])),
    'retweet': webmentions
      .filter(entry => entry['wm-target'] === url)
      .filter(entry => retweet.includes(entry['wm-property']))
      .filter(hasRequiredFields)
      .map(sanitize),
    'messages': webmentions
      .filter(entry => entry['wm-target'] === url)
      .filter(entry => messages.includes(entry['wm-property']))
      .filter(hasRequiredFields)
      .map(sanitize),
  };
}