Ctrlmonster

export type Work = (...args: any[]) => any;

// Pass a function that provides a callback as single argument and returns another function F that calls that
// callback at some point. The result of makeContinuable will be a function that returns a promise that will
// resolve to the return value of F, once the callback is called.
export function makeContinuable<F extends Work>(wrapperFn: (cb: () => void) => F) {
  return async (...args: Parameters<F>) => {
    const outerPromise = new Promise<ReturnType<F>>(async (resolve1) => {
      let res = null as ReturnType<F>;
      // create another promise in whose executioner we'll call the passed function