@remark-embedder/transformer-oembed/dist/index.js

@remark-embedder transformer for oEmbed supported links

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _url = require("url");
// eslint-disable-next-line @typescript-eslint/no-namespace

async function getProviders() {
  if (!getProviders.cache) {
    const res = await fetch('https://oembed.com/providers.json');
    getProviders.cache = await res.json();
  }
  return getProviders.cache;
}

// TODO: Support providers that do not have schemes
async function getProviderEndpointURLForURL(url) {
  const providers = await getProviders();
  for (const provider of providers) {
    for (const endpoint of provider.endpoints) {
      var _endpoint$schemes;
      if ((_endpoint$schemes = endpoint.schemes) != null && _endpoint$schemes.some(scheme => new RegExp(scheme.replace(/\*/g, '(.*)')).test(url))) {
        return {
          provider,
          endpoint: endpoint.url
        };
      }
    }
  }
  return null;
}
const transformer = {
  name: '@remark-embedder/transformer-oembed',
  shouldTransform: async url => {
    const result = await getProviderEndpointURLForURL(url);
    return Boolean(result);
  },
  getHTML: async (urlString, getConfig = {}) => {
    const result = await getProviderEndpointURLForURL(urlString);

    // istanbul ignore if (shouldTransform prevents this, but if someone calls this directly then this would save them)
    if (!result) return null;
    const {
      provider,
      endpoint
    } = result;
    const url = new _url.URL(endpoint);
    url.searchParams.set('url', urlString);
    let config = getConfig;
    if (typeof getConfig === 'function') {
      var _getConfig;
      // I really have no idea what's happening here:
      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
      config = (_getConfig = getConfig({
        url: urlString,
        provider
      })) != null ? _getConfig : {};
    }
    for (const [key, value] of Object.entries((_config$params = config.params) != null ? _config$params : {})) {
      var _config$params;
      url.searchParams.set(key, String(value));
    }

    // format has to be json so it is not configurable
    url.searchParams.set('format', 'json');
    const res = await fetch(url.toString());
    const data = await res.json();
    return data.html;
  }
};
var _default = exports.default = transformer;