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import { urlAlphabet as scopedUrlAlphabet } from './url-alphabet/index.js'
export { urlAlphabet } from './url-alphabet/index.js'
export let random = bytes => crypto.getRandomValues(new Uint8Array(bytes))
export let customRandom = (alphabet, defaultSize, getRandom) => {
let mask = (2 << Math.log2(alphabet.length - 1)) - 1
let step = -~((1.6 * mask * defaultSize) / alphabet.length)
return (size = defaultSize) => {
let id = ''
while (true) {
let bytes = getRandom(step)
let j = step | 0
while (j--) {
id += alphabet[bytes[j] & mask] || ''
if (id.length >= size) return id
}
}
}
}
export let customAlphabet = (alphabet, size = 21) =>
customRandom(alphabet, size | 0, random)
export let nanoid = (size = 21) => {
let id = ''
let bytes = crypto.getRandomValues(new Uint8Array((size |= 0)))
while (size--) {
id += scopedUrlAlphabet[bytes[size] & 63]
}
return id
}
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