// Slide, block and asset ids (spec §2.2): 12 characters of lowercase
// base32, drawn from the platform's CSPRNG. The browser mints an id
// before it calls applyOps, because the core never draws entropy and an
// add_slide / add_block / duplicate_slide without ids is refused.
// generate.mjs never calls this: a vector's ids come from its data file
// so the vector is the same bytes every run.

const ALPHABET = 'abcdefghijklmnopqrstuvwxyz234567'
export const ID_LENGTH = 12

export function newID () {
  const bytes = new Uint8Array(ID_LENGTH)
  globalThis.crypto.getRandomValues(bytes)
  let out = ''
  for (const b of bytes) out += ALPHABET[b & 31]
  return out
}