authsArgToHeaders.js

const resolve = (path, json) => {
  if (Array.isArray(json)) {
    return json.flatMap((item, i) => resolve([...path, i], item));
  }
  if (typeof json === 'object') {
    return Object.keys(json).flatMap((k) => resolve([...path, k], json[k]));
  }
  if (typeof json === 'string') {
    return [{path, value: json}];
  }
  throw new Error('Invalid JSON. All leaf values must be strings.');
};

const jsonToAuthsArgHeaders = (json) => {
  if (Array.isArray(json) || typeof json !== 'object') {
    throw new Error('Invalid JSON. Expected an object.');
  }
  const pairs = resolve([], json);
  const result = {};
  for (const {path, value} of pairs) {
    const headerName = 'X-Auths-' + path.join('-');
    result[headerName] = value;
  }
  return result;
};

// Example:
// jsonToAuthsArgHeaders({gitHubOAuthToken: 'my-token'}) 
// => {'X-Auths-gitHubOAuthToken': 'my-token'}

export default jsonToAuthsArgHeaders;