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-115
lines changed

4 files changed

+155
-115
lines changed

‎nats-base-client/deno.json

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{
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"name": "@nats-io/nats-core",
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"version": "3.0.0-1",
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"exports": {
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".": "./src/mod.ts"
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},
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"publish": {
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"include": [
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"./src/**/*",
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"jsr.json"
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]
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}
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}

‎nats-base-client/nuid.ts

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* limitations under the License.
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*/
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"use strict";
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export {Nuid, nuid} from "../nuid/src/mod.ts"
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const digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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const base = 36;
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const preLen = 12;
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const seqLen = 10;
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const maxSeq = 3656158440062976; // base^seqLen == 36^10
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const minInc = 33;
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const maxInc = 333;
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const totalLen = preLen + seqLen;
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function _getRandomValues(a: Uint8Array) {
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for (let i = 0; i < a.length; i++) {
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a[i] = Math.floor(Math.random() * 255);
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}
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}
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function fillRandom(a: Uint8Array) {
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if (globalThis?.crypto?.getRandomValues) {
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globalThis.crypto.getRandomValues(a);
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} else {
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_getRandomValues(a);
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}
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}
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/**
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* Create and initialize a nuid.
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*
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* @api private
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*/
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export class Nuid {
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buf: Uint8Array;
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seq!: number;
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inc!: number;
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inited: boolean;
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constructor() {
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this.buf = new Uint8Array(totalLen);
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this.inited = false;
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}
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/**
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* Initializes a nuid with a crypto random prefix,
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* and pseudo-random sequence and increment.
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*
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* @api private
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*/
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private init() {
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this.inited = true;
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this.setPre();
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this.initSeqAndInc();
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this.fillSeq();
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}
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/**
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* Initializes the pseudo randmon sequence number and the increment range.
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*
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* @api private
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*/
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private initSeqAndInc() {
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this.seq = Math.floor(Math.random() * maxSeq);
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this.inc = Math.floor(Math.random() * (maxInc - minInc) + minInc);
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}
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/**
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* Sets the prefix from crypto random bytes. Converts to base36.
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*
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* @api private
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*/
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private setPre() {
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const cbuf = new Uint8Array(preLen);
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fillRandom(cbuf);
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for (let i = 0; i < preLen; i++) {
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const di = cbuf[i] % base;
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this.buf[i] = digits.charCodeAt(di);
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}
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}
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/**
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* Fills the sequence part of the nuid as base36 from this.seq.
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*
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* @api private
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*/
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private fillSeq() {
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let n = this.seq;
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for (let i = totalLen - 1; i >= preLen; i--) {
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this.buf[i] = digits.charCodeAt(n % base);
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n = Math.floor(n / base);
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}
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}
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/**
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* Returns the next nuid.
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*
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* @api private
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*/
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next(): string {
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if (!this.inited) {
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this.init();
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}
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this.seq += this.inc;
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if (this.seq > maxSeq) {
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this.setPre();
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this.initSeqAndInc();
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}
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this.fillSeq();
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// @ts-ignore - Uint8Arrays can be an argument
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return String.fromCharCode.apply(String, this.buf);
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}
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reset() {
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this.init();
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}
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}
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export const nuid = new Nuid();

‎nuid/jsr.json

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{
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"name": "@nats-io/nuid",
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"version": "2.0.0-1",
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"exports": {
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".": "./src/mod.ts"
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}
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}

‎nuid/src/mod.ts

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/*
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* Copyright 2016-2024 The NATS Authors
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
14+
*/
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16+
"use strict";
17+
18+
const digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
19+
const base = 36;
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const preLen = 12;
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const seqLen = 10;
22+
const maxSeq = 3656158440062976; // base^seqLen == 36^10
23+
const minInc = 33;
24+
const maxInc = 333;
25+
const totalLen = preLen + seqLen;
26+
27+
function _getRandomValues(a: Uint8Array) {
28+
for (let i = 0; i < a.length; i++) {
29+
a[i] = Math.floor(Math.random() * 255);
30+
}
31+
}
32+
33+
function fillRandom(a: Uint8Array) {
34+
if (globalThis?.crypto?.getRandomValues) {
35+
globalThis.crypto.getRandomValues(a);
36+
} else {
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_getRandomValues(a);
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}
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}
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/**
42+
* Create and initialize a nuid.
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*
44+
* @api private
45+
*/
46+
export class Nuid {
47+
buf: Uint8Array;
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seq!: number;
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inc!: number;
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inited: boolean;
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constructor() {
53+
this.buf = new Uint8Array(totalLen);
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this.inited = false;
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}
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/**
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* Initializes a nuid with a crypto random prefix,
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* and pseudo-random sequence and increment.
60+
*
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* @api private
62+
*/
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private init() {
64+
this.inited = true;
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this.setPre();
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this.initSeqAndInc();
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this.fillSeq();
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}
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/**
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* Initializes the pseudo randmon sequence number and the increment range.
72+
*
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* @api private
74+
*/
75+
private initSeqAndInc() {
76+
this.seq = Math.floor(Math.random() * maxSeq);
77+
this.inc = Math.floor(Math.random() * (maxInc - minInc) + minInc);
78+
}
79+
80+
/**
81+
* Sets the prefix from crypto random bytes. Converts to base36.
82+
*
83+
* @api private
84+
*/
85+
private setPre() {
86+
const cbuf = new Uint8Array(preLen);
87+
fillRandom(cbuf);
88+
for (let i = 0; i < preLen; i++) {
89+
const di = cbuf[i] % base;
90+
this.buf[i] = digits.charCodeAt(di);
91+
}
92+
}
93+
94+
/**
95+
* Fills the sequence part of the nuid as base36 from this.seq.
96+
*
97+
* @api private
98+
*/
99+
private fillSeq() {
100+
let n = this.seq;
101+
for (let i = totalLen - 1; i >= preLen; i--) {
102+
this.buf[i] = digits.charCodeAt(n % base);
103+
n = Math.floor(n / base);
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}
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}
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107+
/**
108+
* Returns the next nuid.
109+
*
110+
* @api private
111+
*/
112+
next(): string {
113+
if (!this.inited) {
114+
this.init();
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}
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this.seq += this.inc;
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if (this.seq > maxSeq) {
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this.setPre();
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this.initSeqAndInc();
120+
}
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this.fillSeq();
122+
// @ts-ignore - Uint8Arrays can be an argument
123+
return String.fromCharCode.apply(String, this.buf);
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}
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reset() {
127+
this.init();
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}
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}
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/**
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* global nuid instance
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*/
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export const nuid: Nuid = new Nuid();

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