// sort of cryptographically strong function to generate Base62 token client-side
export function genBase62Token(length){
  return window.btoa(Array.from(
    window.crypto.getRandomValues(
      new Uint8Array(length * 2)))
      .map((b) => String.fromCharCode(b))
      .join("")).replace(/[+/]/g, "")
      .substring(0, length);
}

export function tokenStrength(token) {
  const characters = token.split("").reduce(function(obj, s){
    obj[s] = (obj[s] || 0) + 1;
    return obj;
  }, {});
  return {uniqueValues:Object.keys(characters).length,counts:Object.values(characters)}
}