murasaki-core/src/index.ts

import * as KanjidicImpl from './sources/kanjidic';
import * as JmdictImpl from './sources/jmdict';

const SUPPORTED_SOURCES = [
  KanjidicImpl,
  JmdictImpl,
] as const;

export type CreateDownloaderParams = (
  KanjidicImpl.CreateDownloaderParams
  | JmdictImpl.CreateDownloaderParams
);

export * as Kanjidic from './sources/kanjidic';
export * as Jmdict from './sources/jmdict';
export * from './streams';

export const createDownloader = (params: CreateDownloaderParams) => {
  const { type: sourceType, ...etcParams } = params;

  const theSourceModule = SUPPORTED_SOURCES
    .find((videoTypeModule) => videoTypeModule.SOURCE_ID === sourceType);

  if (!theSourceModule) {
    const validSourceTypes = SUPPORTED_SOURCES.map((videoTypeModule) => videoTypeModule.SOURCE_ID).join(', ');
    throw new TypeError(`Invalid source type: "${sourceType}". Valid values are: ${validSourceTypes}`);
  }

  return theSourceModule.createDownloader(etcParams);
};