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denoland-deno/std/uuid/v4.ts

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2020-01-02 15:13:47 -05:00
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import { bytesToUuid } from "./_common.ts";
const UUID_RE = new RegExp(
"^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$",
"i",
);
export function validate(id: string): boolean {
return UUID_RE.test(id);
}
export function generate(): string {
const rnds = crypto.getRandomValues(new Uint8Array(16));
rnds[6] = (rnds[6] & 0x0f) | 0x40; // Version 4
rnds[8] = (rnds[8] & 0x3f) | 0x80; // Variant 10
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return bytesToUuid(rnds);
}