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https://github.com/zhigang1992/react-native-firebase.git
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fe959bb842
* [database] recreate database branch based off of #2185 * [database] cleanup linting issues * [database] enable tests * [database] add to tests deps
59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
/*
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* Copyright (c) 2016-present Invertase Limited & Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this library except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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import { isFunction } from './validate';
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/**
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*
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*/
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export function promiseDefer() {
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const deferred = {
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resolve: null,
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reject: null,
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};
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deferred.promise = new Promise((resolve, reject) => {
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deferred.resolve = resolve;
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deferred.reject = reject;
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});
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return deferred;
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}
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/**
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* @param promise
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* @param callback
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*/
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export function promiseWithOptionalCallback(promise, callback) {
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if (!isFunction(callback)) return promise;
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return promise
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.then(result => {
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if (callback && callback.length === 1) {
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callback(null);
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} else if (callback) {
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callback(null, result);
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}
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return result;
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})
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.catch(error => {
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if (callback) callback(error);
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return Promise.reject(error);
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});
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}
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