idUtil

id-util.ts

export namespace idUtil {
  export function create() {
    let str = '';
    for (let i = 0; i < 16; i += 1) {
      const base = 'abcdefghijklmnopqrstuvwxyz234567'; //a-z, 2-7
      const array = new Int32Array(1);
      window.crypto.getRandomValues(array);
      const j = array[0];
      str +=
        base[(j >>> 27) & 0x1f] +
        base[(j >>> 22) & 0x1f] +
        base[(j >>> 17) & 0x1f] +
        base[(j >>> 12) & 0x1f] +
        base[(j >>> 7) & 0x1f] +
        base[(j >>> 2) & 0x1f]; // (length is always 6)
    }
    return str;
  }

  // case-insensitive
  export function validate(id: any): id is string {
    return typeof id === 'string' && id.length === 96 && new RegExp(/^[a-z2-7]+$/i).test(id);
  }
}