Class: Helper::RrnHelper

Inherits:
Object
  • Object
show all
Defined in:
lib/helper/rrn_helper.rb

Defined Under Namespace

Classes: RrnNotValid

Constant Summary collapse

VALID_RRN = 
"^(\\d{4}-){4}\\d{4}$".freeze

Class Method Summary collapse

Class Method Details

.hash_rrn(rrn) ⇒ Object 



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# File 'lib/helper/rrn_helper.rb', line 24

def self.hash_rrn(rrn)
  rrn_array = rrn.split("-")
  rrn_array.unshift(rrn_array.last)
  rrn_array << rrn_array[1]
  Digest::SHA256.hexdigest rrn_array.join("-")
end

.normalise_rrn_format(rrn) ⇒ Object

Raises:



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# File 'lib/helper/rrn_helper.rb', line 9

def self.normalise_rrn_format(rrn)
  # Strip surrounding whitespace
  rrn = rrn.strip

  # Remove all hyphens
  rrn = rrn.tr("-", "")
  raise RrnNotValid unless rrn.length == 20

  # Add a hyphen every four characters to give desired RRN format
  rrn = rrn.scan(/.{1,4}/).join("-")
  raise RrnNotValid unless Regexp.new(VALID_RRN).match(rrn)

  rrn
end