spb/datacenterindex

1import { randomBytes, createHash } from "node:crypto";23const ALPHABET = "0123456789abcdefghijkmnpqrstuvwxyz"; // no l/o to avoid confusion45export const ID_PREFIXES = {6  facility: "fac",7  campus: "cmp",8  operator: "op",9  cloud_region: "cr",10  metro: "met",11  ixp: "ix",12  project: "prj",13  event: "evt",14  document: "doc",15  source: "src",16  news: "nws",17  run: "run",18  match: "mtc",19  provenance: "prv",20  ranking: "rnk",21  claim: "clm",22  flag: "flg",23  constraint: "grd",24  watch: "wtc",25  cluster: "cls",26} as const;27export type IdKind = keyof typeof ID_PREFIXES;2829export function newId(kind: IdKind, len = 12): string {30  const bytes = randomBytes(len);31  let out = "";32  for (let i = 0; i < len; i++) out += ALPHABET[bytes[i]! % ALPHABET.length];33  return `${ID_PREFIXES[kind]}_${out}`;34}3536/** Deterministic id from a stable key (used for documents/provenance so re-runs are idempotent). */37export function stableId(kind: IdKind, key: string, len = 16): string {38  const h = createHash("sha256").update(key).digest("hex").slice(0, len);39  return `${ID_PREFIXES[kind]}_${h}`;40}4142export function kindOfId(id: string): IdKind | null {43  const p = id.split("_")[0];44  for (const [k, v] of Object.entries(ID_PREFIXES)) if (v === p) return k as IdKind;45  return null;46}47