AK-21/Graphite-Industrial-Intelligence

1 2import { urlAlphabet } from './url-alphabet/index.js'3 4let random = bytes => crypto.getRandomValues(new Uint8Array(bytes))5 6let customRandom = (alphabet, defaultSize, getRandom) => {7  let mask = (2 << (Math.log(alphabet.length - 1) / Math.LN2)) - 18 9 10 11  let step = -~((1.6 * mask * defaultSize) / alphabet.length)12 13  return (size = defaultSize) => {14    let id = ''15    while (true) {16      let bytes = getRandom(step)17      let j = step | 018      while (j--) {19        id += alphabet[bytes[j] & mask] || ''20        if (id.length === size) return id21      }22    }23  }24}25 26let customAlphabet = (alphabet, size = 21) =>27  customRandom(alphabet, size, random)28 29let nanoid = (size = 21) =>30  crypto.getRandomValues(new Uint8Array(size)).reduce((id, byte) => {31    byte &= 6332    if (byte < 36) {33      id += byte.toString(36)34    } else if (byte < 62) {35      id += (byte - 26).toString(36).toUpperCase()36    } else if (byte > 62) {37      id += '-'38    } else {39      id += '_'40    }41    return id42  }, '')43 44export { nanoid, customAlphabet, customRandom, urlAlphabet, random }45