const binLookup = (c) => {
  switch (c.toLowerCase()) {
    case '0': return '0000'
    case '1': return '0001'
    case '2': return '0010'
    case '3': return '0011'
    case '4': return '0100'
    case '5': return '0101'
    case '6': return '0110'
    case '7': return '0111'
    case '8': return '1000'
    case '9': return '1001'
    case 'a': return '1010'
    case 'b': return '1011'
    case 'c': return '1100'
    case 'd': return '1101'
    case 'e': return '1110'
    case 'f': return '1111'
    default: return ''
  }
}
const hexToBinary = (hexString) => {
  /*
    Function for converting Hex to Binary

    1. We convert every hexadecimal bit to 4 binary bits
    2. Conversion goes by searching in the lookup table

    */
  const hexLexemes = hexString.split('')
  return hexLexemes.map(lexeme => binLookup(lexeme)).join('')
}

export default hexToBinary