ui/web/src/composables/Utils.ts

   1 const isUndefined = (value: unknown): boolean => {
   2   return typeof value === 'undefined';
   3 };
   4
   5 export const ifUndefined = <T>(value: T | undefined, isValue: T): T => {
   6   if (isUndefined(value) === true) return isValue;
   7   return value as T;
   8 };
   9
  10 // const isIterable = <T>(obj: T): boolean => {
  11 //   if (obj === null || obj === undefined) {
  12 //     return false;
  13 //   }
  14 //   return typeof (obj as unknown as Iterable<T>)[Symbol.iterator] === 'function';
  15 // };
  16
  17 // const ifNotIterableDo = <T>(obj: T, cb: () => void): void => {
  18 //   if (isIterable(obj) === false) cb();
  19 // };
  20
  21 const isPromisePending = (promise: Promise<unknown>): boolean => {
  22   return util.inspect(promise).includes('pending');
  23 };
  24
  25 export const promiseWithTimeout = <T>(
  26   promise: Promise<T>,
  27   timeoutMs: number,
  28   timeoutError: Error,
  29   timeoutCallback: () => void = () => {
  30     /* This is intentional */
  31   },
  32 ): Promise<T> => {
  33   // Create a timeout promise that rejects in timeout milliseconds
  34   const timeoutPromise = new Promise<never>((_, reject) => {
  35     setTimeout(() => {
  36       if (isPromisePending(promise)) {
  37         timeoutCallback();
  38         // FIXME: The original promise shall be canceled
  39       }
  40       reject(timeoutError);
  41     }, timeoutMs);
  42   });
  43
  44   // Returns a race between timeout promise and the passed promise
  45   return Promise.race<T>([promise, timeoutPromise]);
  46 };
  47
  48 // export const compose = <T>(...fns: ((arg: T) => T)[]): ((x: T) => T) => {
  49 //   return (x: T) => fns.reduceRight((y, fn) => fn(y), x);
  50 // };