git.r.bdr.sh - rbdr/forum/blob - src/lib/utils/resolve_after.ts

   1 export type ResolveAfterPromise = {
   2   counter: () => void,
   3   promise: Promise<void>
   4 };
   5
   6 export const resolveAfter = function (timesUntilResolve: number): ResolveAfterPromise {
   7
   8   let counter = null;
   9   let currentValue = 0;
  10
  11   if (timesUntilResolve <= 0) {
  12     throw new Error('Resolve after requires a positive integer');
  13   }
  14
  15   const promise: Promise<void> = new Promise((resolvePromise) => {
  16
  17     counter = () => {
  18
  19       if (++currentValue === timesUntilResolve) {
  20         resolvePromise();
  21       }
  22     };
  23   });
  24
  25   return {
  26     counter,
  27     promise
  28   };
  29 };