update

ts/promise-make-naked/index.ts

@@ -0,0 +1,53 @@
+
+/* IMPORT */
+
+import {NOOP} from './constants.js';
+import type {PromiseResolve, PromiseReject, Result} from './types.js';
+
+/* MAIN */
+
+const makeNakedPromise = <T> (): Result<T> => {
+
+  let resolve: PromiseResolve<T> = NOOP;
+  let reject: PromiseReject = NOOP;
+
+  let resolved = false;
+  let rejected = false;
+
+  const promise = new Promise<T> ( ( res, rej ): void => {
+
+    resolve = value => {
+      resolved = true;
+      return res ( value );
+    };
+
+    reject = value => {
+      rejected = true;
+      return rej ( value );
+    };
+
+  });
+
+  const isPending = (): boolean => !resolved && !rejected;
+  const isResolved = (): boolean => resolved;
+  const isRejected = (): boolean => rejected;
+
+  return {promise, resolve, reject, isPending, isResolved, isRejected};
+
+};
+
+/* UTILITIES */
+
+makeNakedPromise.wrap = async <T> ( fn: ( result: Result<T> ) => void ): Promise<T> => {
+
+  const result = makeNakedPromise<T> ();
+
+  await fn ( result );
+
+  return result.promise;
+
+};
+
+/* EXPORT */
+
+export default makeNakedPromise;