Class: Cnp

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

Class Method Summary collapse

Class Method Details

.valid?(cnp) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cnp.rb', line 2

def self.valid?(cnp)
  return false unless (cnp=~(/[^0-9]/)).nil? && cnp.size == 13
  require 'date'
  begin
    year = case
             when
             cnp[0].chr == "1" || cnp[0].chr == "2" then "19"
             when
             cnp[0].chr == "3" || cnp[0].chr == "4" then "18"
             when
             cnp[0].chr == "5" || cnp[0].chr == "6" then "20"
             when
             cnp[0].chr == "9" then "19" # oare se sare peste un an bisect intre 1800-2099 ?
             else return false;
           end
    year = (year + cnp[1..2]).to_i
    return false unless Date.valid_civil?(year,cnp[3..4].to_i,cnp[5..6].to_i)
  rescue ArgumentError
    return false
  end
  test_key = "279146358279"
  (0..11).inject(0){|sum, n| sum += test_key[n].chr.to_i * cnp[n].chr.to_i} % 11 == cnp[12].chr.to_i
end