Function transformValueOrPromise

packages/context/src/value-promise.ts:291–300

(
  valueOrPromise: ValueOrPromise<T>,
  transformer: (val: T) => ValueOrPromise<V>,
)

 * @param transformer - A function that maps the source value to a value or promise
 */
export function transformValueOrPromise<T, V>(
  valueOrPromise: ValueOrPromise<T>,
  transformer: (val: T) => ValueOrPromise<V>,
): ValueOrPromise<V> {
  if (isPromiseLike(valueOrPromise)) {
    return valueOrPromise.then(transformer);
  } else {
    return transformer(valueOrPromise);
  }
}

/**
 * A utility to generate uuid v4