hashid.js

'use strict'

// Taken from: https://gist.github.com/fiznool/73ee9c7a11d1ff80b81c

/**
 * The default alphabet is 25 numbers and lowercase letters.
 * Any numbers that look like letters and vice versa are removed:
 * 1 l, 0 o.
 * Also the following letters are not present, to prevent any
 * expletives: cfhistu
 */
var ALPHABET =
'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'

var ALPHABET_LENGTH = ALPHABET.length

// Governs the length of the ID.
// With an alphabet of 25 chars,
// a length of 8 gives us 25^8 or
// 152,587,890,625 possibilities.
// Should be enough...
var ID_LENGTH = 8

var HashID = {}

/**
 * Returns a randomly-generated friendly ID.
 * Note that the friendly ID is not guaranteed to be
 * unique to any other ID generated by this same method,
 * so it is up to you to check for uniqueness.
 * @return {String} friendly ID.
 */
HashID.generate = function () {
  var rtn = ''
  for (var i = 0; i < ID_LENGTH; i++) {
    rtn += ALPHABET.charAt(Math.floor(Math.random() * ALPHABET_LENGTH))
  }
  return rtn
}