mirror of https://github.com/denoland/deno.git
34 lines
801 B
TypeScript
34 lines
801 B
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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const UUID_RE = new RegExp(
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"^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$",
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"i"
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);
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export function validate(id: string): boolean {
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return UUID_RE.test(id);
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}
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export default function generate(): string {
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const rnds = crypto.getRandomValues(new Uint8Array(16));
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rnds[6] = (rnds[6] & 0x0f) | 0x40; // Version 4
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rnds[8] = (rnds[8] & 0x3f) | 0x80; // Variant 10
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const bits: string[] = [...rnds].map((bit): string => {
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const s: string = bit.toString(16);
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return bit < 0x10 ? "0" + s : s;
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});
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return [
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...bits.slice(0, 4),
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"-",
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...bits.slice(4, 6),
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"-",
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...bits.slice(6, 8),
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"-",
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...bits.slice(8, 10),
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"-",
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...bits.slice(10)
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].join("");
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}
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