alinea/dist/core/Id.js

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import "../chunks/chunk-U5RRZUYZ.js";

// src/core/Id.ts
import { crypto } from "@alinea/iso";
var BASE62 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
function base62(view) {
  if (view.byteLength !== 20) {
    throw new Error("incorrect buffer size");
  }
  let str = new Array(27).fill("0");
  let n = 27;
  let bp = new Array(5);
  bp[0] = view.getUint32(0, false);
  bp[1] = view.getUint32(4, false);
  bp[2] = view.getUint32(8, false);
  bp[3] = view.getUint32(12, false);
  bp[4] = view.getUint32(16, false);
  const srcBase = 4294967296n;
  const dstBase = 62n;
  while (bp.length != 0) {
    let quotient = [];
    let remainder = 0;
    for (const c of bp) {
      let value = BigInt(c) + BigInt(remainder) * srcBase;
      let digit = value / dstBase;
      remainder = Number(value % dstBase);
      if (quotient.length !== 0 || digit !== 0n) {
        quotient.push(Number(digit));
      }
    }
    n--;
    str[n] = BASE62.charAt(remainder);
    bp = quotient;
  }
  return str.join("");
}
function toEpoch(timestamp, desc) {
  if (!desc) {
    return Math.round(timestamp / 1e3) - 14e8;
  }
  return 4294967295 - (Math.round(timestamp / 1e3) - 14e8);
}
function randomBytes() {
  return crypto.getRandomValues(new Uint8Array(16));
}
function generate(desc = false, timestamp = Date.now()) {
  const buf = new ArrayBuffer(20);
  const view = new DataView(buf);
  const ts = toEpoch(timestamp, desc);
  let offset = 0;
  view.setUint32(offset, ts, false);
  offset += 4;
  const rnd = randomBytes();
  for (const b of rnd) {
    view.setUint8(offset++, b);
  }
  if (desc)
    return "z" + base62(view);
  return base62(view);
}
function createId() {
  return generate();
}
export {
  createId
};