a2b.ts

/**
 * this function replaces atob() which is a method of the window object and does not run
 * properly on node. it takes a base64 encoded string and DECODES it into a js obj
 * ----found at ----> https://gist.github.com/oeon/0ada0457194ebf70ec2428900ba76255
 */
export const a2b = (a: string): string => {
  let b, c, d
  const e = {}
  let f = 0
  let g = 0
  let h = ''
  const i = String.fromCharCode
  const j = a && a.length
  for (b = 0; 64 > b; b++)
    e['ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.charAt(b)] = b
  for (c = 0; j > c; c++)
    for (b = e[a.charAt(c)], f = (f << 6) + b, g += 6; g >= 8; )
      ((d = 255 & (f >>> (g -= 8))) || j - 2 > c) && (h += i(d))
  return h
}