| 1 | /**
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| 2 | * Copyright (c) 2015-present, Facebook, Inc.
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| 3 | *
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| 4 | * This source code is licensed under the MIT license found in the
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| 5 | * LICENSE file in the root directory of this source tree.
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| 6 | *
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| 7 | * strict
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| 8 | */
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| 9 |
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| 10 | /**
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| 11 | * This function transforms a JS object `ObjMap<Promise<T>>` into
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| 12 | * a `Promise<ObjMap<T>>`
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| 13 | *
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| 14 | * This is akin to bluebird's `Promise.props`, but implemented only using
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| 15 | * `Promise.all` so it will work with any implementation of ES6 promises.
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| 16 | */
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| 17 | export default function promiseForObject(object) {
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| 18 | var keys = Object.keys(object);
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| 19 | var valuesAndPromises = keys.map(function (name) {
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| 20 | return object[name];
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| 21 | });
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| 22 | return Promise.all(valuesAndPromises).then(function (values) {
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| 23 | return values.reduce(function (resolvedObject, value, i) {
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| 24 | resolvedObject[keys[i]] = value;
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| 25 | return resolvedObject;
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| 26 | }, Object.create(null));
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| 27 | });
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| 28 | } |
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