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/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Generates a random UUID (Universally Unique Identifier) following the version
* 4 standard.
*
* The function replaces each 'x' and 'y' in the template
* 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx' with random hexadecimal digits. For
* 'y', the function ensures the first hexadecimal digit is '8', '9', 'A', or
* 'B' as per the UUID v4 standard.
*
* @returns A string representing a version 4 UUID.
*
* @example
*
* const id = uuidv4();
* console.log(id); // Outputs: '3f0d2c77-4f69-4c1e-8a6e-35e866e8a5d1'
*/
export function uuidv4() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
const r = (Math.random() * 16) | 0,
v = c == 'x' ? r : (r & 0x3) | 0x8;
return v.toString(16);
});
}
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