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53 lines
1.3 KiB
TypeScript
53 lines
1.3 KiB
TypeScript
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import {
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bytesToUuid,
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createBuffer,
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stringToBytes,
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uuidToBytes,
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} from "./_common.ts";
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import { Sha1 } from "../util/sha1.ts";
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import { isString } from "../node/util.ts";
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import { assert } from "../testing/asserts.ts";
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const UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
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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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interface V5Options {
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value: string | number[];
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namespace: string | number[];
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}
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export function generate(
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options: V5Options,
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buf?: number[],
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offset?: number
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): string | number[] {
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const i = (buf && offset) || 0;
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let { value, namespace } = options;
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if (isString(value)) value = stringToBytes(value as string);
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if (isString(namespace)) namespace = uuidToBytes(namespace as string);
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assert(
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namespace.length === 16,
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"namespace must be uuid string or an Array of 16 byte values"
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);
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const content = (namespace as number[]).concat(value as number[]);
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const bytes = new Sha1().update(createBuffer(content)).digest();
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bytes[6] = (bytes[6] & 0x0f) | 0x50;
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bytes[8] = (bytes[8] & 0x3f) | 0x80;
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if (buf) {
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for (let idx = 0; idx < 16; ++idx) {
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buf[i + idx] = bytes[idx];
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}
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}
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return buf || bytesToUuid(bytes);
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}
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