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30 lines
534 B
JavaScript
30 lines
534 B
JavaScript
"use strict";
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const pDefer = require("p-defer");
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// FIXME: Move into separate package, and see if this can be used in other stream implementations too
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module.exports = function createPromiseNotifier() {
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let promise, resolve;
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return {
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wait: function () {
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if (promise == null) {
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let defer = pDefer();
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promise = defer.promise;
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resolve = defer.resolve;
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}
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return promise;
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},
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notify: function (value) {
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if (resolve != null) {
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resolve(value);
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promise = null;
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resolve = null;
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}
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}
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};
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};
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