class Egn::Validator

Attributes

egn[R]

Public Class Methods

new(egn) click to toggle source
# File lib/egn/validator.rb, line 10
def initialize(egn)
  @egn = egn

  @year, @month, @day = explode_date(egn)
end
validate(egn) click to toggle source

Convenience method

# File lib/egn/validator.rb, line 6
def self.validate(egn)
  Validator.new(egn).validate
end

Public Instance Methods

validate() click to toggle source

Checks if a given EGN is valid

# File lib/egn/validator.rb, line 17
def validate
  return false unless @egn.length == 10
  return false unless Date.valid_date?(@year, @month, @day)
  
  # Gregorian calendar adoption in 1916 in Bulgaria
  # 31/03/1916 > +13 days > 14/04/1916
  return false if @year == 1916 && @month == 4 && @day <= 13

  # Calculate the checksum and check if the given one is correct
  checksum = Util.egn_checksum(@egn[0, 9])
  checksum == @egn[9].to_i
end

Private Instance Methods

explode_date(egn) click to toggle source
# File lib/egn/validator.rb, line 32
def explode_date(egn)
  year, month, day = egn.scan(/.{1,2}/).map(&:to_i)
  year, month = Util.determine_date(year, month)
  [year, month, day]
end