@devgrid/common/dist/cuid.js

Some useful primitives

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getConstants = exports.isCuid = exports.cuid = exports.init = exports.createCounter = exports.createFingerprint = void 0;
exports.bufToBigInt = bufToBigInt;
const sha3_1 = require("@noble/hashes/sha3");
const defaultLength = 24;
const bigLength = 32;
const createEntropy = (length = 4, random = Math.random) => {
    let entropy = '';
    while (entropy.length < length) {
        entropy = entropy + Math.floor(random() * 36).toString(36);
    }
    return entropy;
};
function bufToBigInt(buf) {
    const bits = BigInt(8);
    let value = BigInt(0);
    for (const i of buf.values()) {
        const bi = BigInt(i);
        value = (value << bits) + bi;
    }
    return value;
}
const hash = (input = '') => bufToBigInt((0, sha3_1.sha3_512)(input)).toString(36).slice(1);
const alphabet = Array.from({ length: 26 }, (x, i) => String.fromCharCode(i + 97));
const randomLetter = (random) => alphabet[Math.floor(random() * alphabet.length)];
const createFingerprint = ({ globalObj = typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : {}, random = Math.random, } = {}) => {
    const globals = Object.keys(globalObj).toString();
    const sourceString = globals.length ? globals + createEntropy(bigLength, random) : createEntropy(bigLength, random);
    return hash(sourceString).substring(0, bigLength);
};
exports.createFingerprint = createFingerprint;
const createCounter = (count) => () => count++;
exports.createCounter = createCounter;
const initialCountMax = 476782367;
const init = ({ random = Math.random, counter = (0, exports.createCounter)(Math.floor(random() * initialCountMax)), length = defaultLength, fingerprint = (0, exports.createFingerprint)({ random }), } = {}) => function cuid2() {
    const firstLetter = randomLetter(random);
    const time = Date.now().toString(36);
    const count = counter().toString(36);
    const salt = createEntropy(length, random);
    const hashInput = `${time + salt + count + fingerprint}`;
    return `${firstLetter + hash(hashInput).substring(1, length)}`;
};
exports.init = init;
exports.cuid = (0, exports.init)({
    length: 16,
});
const isCuid = (id, { minLength = 2, maxLength = bigLength } = {}) => {
    const length = id.length;
    const regex = /^[a-z][0-9a-z]+$/;
    try {
        if (typeof id === 'string' && length >= minLength && length <= maxLength && regex.test(id))
            return true;
    }
    finally {
    }
    return false;
};
exports.isCuid = isCuid;
const getConstants = () => ({ defaultLength, bigLength });
exports.getConstants = getConstants;
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