Function promiseWhile

src/utils.ts:423–442

(
  action: () => Promise<T>,
  check: (value: T) => boolean,
  interval = 2500,
)

 * sync check returns false. Resolves with the value that passed the check.
 */
export async function promiseWhile<T>(
  action: () => Promise<T>,
  check: (value: T) => boolean,
  interval = 2500,
): Promise<T> {
  return new Promise<T>((resolve, promiseReject) => {
    const run = async () => {
      try {
        const res = await action();
        if (check(res)) {
          return resolve(res);
        }
        setTimeout(run, interval);
      } catch (err: unknown) {
        return promiseReject(err);
      }
    };
    run();
  });
}

/**
 * Return a promise that rejects after timeoutMs but otherwise behave the same.