54 lines
1.0 KiB
TypeScript
Executable File
54 lines
1.0 KiB
TypeScript
Executable File
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/* IMPORT */
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import {NOOP} from './constants.js';
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import type {PromiseResolve, PromiseReject, Result} from './types.js';
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/* MAIN */
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const makeNakedPromise = <T> (): Result<T> => {
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let resolve: PromiseResolve<T> = NOOP;
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let reject: PromiseReject = NOOP;
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let resolved = false;
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let rejected = false;
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const promise = new Promise<T> ( ( res, rej ): void => {
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resolve = value => {
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resolved = true;
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return res ( value );
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};
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reject = value => {
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rejected = true;
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return rej ( value );
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};
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});
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const isPending = (): boolean => !resolved && !rejected;
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const isResolved = (): boolean => resolved;
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const isRejected = (): boolean => rejected;
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return {promise, resolve, reject, isPending, isResolved, isRejected};
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};
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/* UTILITIES */
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makeNakedPromise.wrap = async <T> ( fn: ( result: Result<T> ) => void ): Promise<T> => {
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const result = makeNakedPromise<T> ();
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await fn ( result );
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return result.promise;
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};
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/* EXPORT */
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export default makeNakedPromise;
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