react-native/Libraries/Utilities/nativeModulePrefixNormalize...

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule nativeModulePrefixNormalizer
* @flow
*/
'use strict';
// Dirty hack to support old (RK) and new (RCT) native module name conventions
function nativeModulePrefixNormalizer(
modules: {[key: string]: any}
): void {
Object.keys(modules).forEach((moduleName) => {
var strippedName = moduleName.replace(/^(RCT|RK)/, '');
if (modules['RCT' + strippedName] && modules['RK' + strippedName]) {
throw new Error(
'Module cannot be registered as both RCT and RK: ' + moduleName
);
}
if (strippedName !== moduleName) {
modules[strippedName] = modules[moduleName];
delete modules[moduleName];
}
});
}
module.exports = nativeModulePrefixNormalizer;