Update / use typescript

[rbdr/forum] / src / lib / utils / resolve_after.ts

export type ResolveAfterPromise = {
  counter: () => void,
  promise: Promise<void>
};

export const resolveAfter = function (timesUntilResolve: number): ResolveAfterPromise {

  let counter = null;
  let currentValue = 0;

  if (timesUntilResolve <= 0) {
    throw new Error('Resolve after requires a positive integer');
  }

  const promise: Promise<void> = new Promise((resolvePromise) => {

    counter = () => {

      if (++currentValue === timesUntilResolve) {
        resolvePromise();
      }
    };
  });

  return {
    counter,
    promise
  };
};