20 lines
1.1 KiB
JavaScript
20 lines
1.1 KiB
JavaScript
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import parse from './parse.js';
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import { unsafeStringify } from './stringify.js';
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/**
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* Convert a v1 UUID to a v6 UUID
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*
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* @param {string|Uint8Array} uuid - The v1 UUID to convert to v6
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* @returns {string|Uint8Array} The v6 UUID as the same type as the `uuid` arg
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* (string or Uint8Array)
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*/
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export default function v1ToV6(uuid) {
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const v1Bytes = typeof uuid === 'string' ? parse(uuid) : uuid;
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const v6Bytes = _v1ToV6(v1Bytes);
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return typeof uuid === 'string' ? unsafeStringify(v6Bytes) : v6Bytes;
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}
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// Do the field transformation needed for v1 -> v6
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function _v1ToV6(v1Bytes, randomize = false) {
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return Uint8Array.of((v1Bytes[6] & 0x0f) << 4 | v1Bytes[7] >> 4 & 0x0f, (v1Bytes[7] & 0x0f) << 4 | (v1Bytes[4] & 0xf0) >> 4, (v1Bytes[4] & 0x0f) << 4 | (v1Bytes[5] & 0xf0) >> 4, (v1Bytes[5] & 0x0f) << 4 | (v1Bytes[0] & 0xf0) >> 4, (v1Bytes[0] & 0x0f) << 4 | (v1Bytes[1] & 0xf0) >> 4, (v1Bytes[1] & 0x0f) << 4 | (v1Bytes[2] & 0xf0) >> 4, 0x60 | v1Bytes[2] & 0x0f, v1Bytes[3], v1Bytes[8], v1Bytes[9], v1Bytes[10], v1Bytes[11], v1Bytes[12], v1Bytes[13], v1Bytes[14], v1Bytes[15]);
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}
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