Class: Valvat::Checksum::IE

Inherits:
Base
  • Object
show all
Defined in:
lib/valvat/checksum/ie.rb

Constant Summary collapse

CHARS = 
'WABCDEFGHIJKLMNOPQRSTUV'.split('')

Instance Attribute Summary

Attributes inherited from Base

#vat

Instance Method Summary collapse

Methods inherited from Base

check_digit_length, #initialize, #validate

Constructor Details

This class inherits a constructor from Valvat::Checksum::Base

Instance Method Details

#check_digit ⇒ Object 



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# File 'lib/valvat/checksum/ie.rb', line 6

def check_digit
  total = sum_figures_by do |fig, i|
    fig * (i + 2)
  end
  total += ((CHARS.index(str_wo_country[8]) || 0) * 9) if str_wo_country.size == 9
  total.modulo(23)
end

#figures_str ⇒ Object 



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# File 'lib/valvat/checksum/ie.rb', line 34

def figures_str
  if super.size == 8
    super[0...-1]
  else
    super
  end
end

#given_check_digit ⇒ Object 



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# File 'lib/valvat/checksum/ie.rb', line 16

def given_check_digit
  if str_wo_country.size == 9
    CHARS.index(str_wo_country[7])
  else
    CHARS.index(given_check_digit_str)
  end
end

#str_wo_country ⇒ Object 



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# File 'lib/valvat/checksum/ie.rb', line 24

def str_wo_country
  str = super
  # Convert old irish vat format to new one
  if str =~ /\A[0-9][A-Z][0-9]{5}[A-Z]\Z/
    "0#{str[2..6]}#{str[0]}#{str[7]}"
  else
    str
  end
end