@comyata/fe/Importer/RemoteImporter.js

Execute YAML and JSON files like programs and get clean data to work with as result.

import { convert } from '@comyata/fe/Converter';
import { extname } from '@comyata/fe/Helpers/extname';
import yaml from 'yaml';
export const remoteImporter = ({
  converter,
  converterDefault,
  noRelativeResolve
} = {}) => {
  const importerId = 'remote';
  const convertDefault = converterDefault ||= value => yaml.parse(value);
  const resolveContextWithRelative = baseUrl => {
    const base = new URL(baseUrl);
    const baseNormalized = base.origin + base.pathname;
    // (base.pathname.endsWith('/') ?
    //     base.pathname :
    //     base.pathname + '/')
    return {
      importer: importerId,
      resolveRelative: relPath => {
        return new URL(relPath, baseNormalized).href;
      }
    };
  };
  const resolveContext = noRelativeResolve ? () => ({
    importer: importerId
  }) : resolveContextWithRelative;
  const resolveFileContext = fileUrl => {
    const uri = new URL(fileUrl);
    return {
      load: async () => await fetch(fileUrl).then(b => {
        return b.status >= 200 && b.status < 400 ? b.text().then(t => ({
          text: t,
          contentType: b.headers.get('content-type')
        })) : b.text().then(t => Promise.reject({
          text: t,
          contentType: b.headers.get('content-type')
        }));
      }).then(b => {
        const contentTypeInfo = b.contentType?.split(';');
        return convert(converter, convertDefault, {
          ext: extname(uri.pathname).toLowerCase(),
          mime: contentTypeInfo?.[0],
          url: fileUrl
        })(b.text, contentTypeInfo?.[1]);
      }),
      ...resolveContext(fileUrl)
    };
  };
  return {
    id: importerId,
    // todo: support adding url bases via scopes??
    scopes: ['http://', 'https://'],
    resolveDirectory: resolveContext,
    resolveFile: resolveFileContext
  };
};