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/*
Generates a UUID/GUID in Node.Js.
The script uses `Math.random` in combination with the timestamp for better randomness.
The function generate an RFC4122 (https://www.ietf.org/rfc/rfc4122.txt) version 4 UUID/GUID
*/
export const Guid = () => {
const pattern = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
let currentDateMilliseconds = new Date().getTime()
return pattern.replace(/[xy]/g, (currentChar) => {
const randomChar = (currentDateMilliseconds + Math.random() * 16) % 16 | 0
currentDateMilliseconds = Math.floor(currentDateMilliseconds / 16)
return (
currentChar === 'x' ? randomChar : (randomChar & 0x7) | 0x8
).toString(16)
})
}
// > Guid()
// 'edc848db-3478-1760-8b55-7986003d895f'