55 lines
1.6 KiB
JavaScript
55 lines
1.6 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* Helper for deprecated callback pattern
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*
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* @providesModule deprecatedCallback
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* @flow
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*/
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'use strict';
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module.exports = function(promise: Promise<any>, callbacks: Array<Function>, type: string, warning: string): Promise<any> {
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if (callbacks.length === 0) {
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return promise;
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}
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let success, error, callback;
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console.warn(warning);
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switch (type) {
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case 'success-first': // handles func(success, error), func(success)
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[ success, error ] = callbacks;
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return promise.then(
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res => success(res),
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err => error && error(err)
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);
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case 'error-first': // handles func(error, success)
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[ error, success ] = callbacks;
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return promise.then(
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res => success(res),
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err => error(err)
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);
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case 'single-callback-value-first': // handles func(callback(value, err))
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[ callback ] = callbacks;
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return promise.then(
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res => callback(res),
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err => callback(null, err)
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);
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case 'node': // handles func(callback(err, value))
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[ callback ] = callbacks;
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return promise.then(
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res => callback(null, res),
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err => callback(err)
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);
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default:
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throw new Error(`Type of callbacks not specified. Must be one of 'success-first', 'error-first', 'single-callback-value-first', or 'node'`);
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}
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};
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