const cachedResourceMap = new Map<string, string>();

const convertResourceToDataURL = async (url: string, useCache = true): Promise<string> => {
  if (useCache && cachedResourceMap.has(url)) {
    return Promise.resolve(cachedResourceMap.get(url) as string);
  }

  const res = await fetch(url);
  const blob = await res.blob();

  return new Promise((resolve) => {
    const reader = new FileReader();
    reader.onloadend = () => {
      const base64Url = reader.result as string;
      cachedResourceMap.set(url, base64Url);
      resolve(base64Url);
    };
    reader.readAsDataURL(blob);
  });
};

export default convertResourceToDataURL;