Module: QRCreditorReference

Defined in:
lib/qr-bills/qr-creditor-reference.rb

Overview

implement Creditor Reference ISO 11649 generator

Constant Summary collapse

PREFIX = 
"RF"

Class Method Summary collapse

Class Method Details

.create(reference) ⇒ Object 



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# File 'lib/qr-bills/qr-creditor-reference.rb', line 37

def self.create(reference)
  reference = reference.delete(' ')
  chars = reference.split('')

  if chars.size == 0 
    raise QRExceptions::INVALID_PARAMETERS + ": provided reference too short: must be at least one char"
  end

  # max 25 chars: 2 chars (RF) + 2 chars (check code) + 21 chars (reference)
  if chars.size > 21 
    raise QRExceptions::INVALID_PARAMETERS + ": provided reference too long: must be less than 21 chars"
  end

  reference_val = ""

  chars.each do |c|
    reference_val += get_char_value(c).to_s
  end

  # put RF+00 at the end to resolve check code
  reference_val += @char_values["R".to_sym].to_s + @char_values["F".to_sym].to_s + "00"

  # get check code
  # when performing the validation of the check code (n % 97) 
  # the remainder must be equal to 1, thus the 98
  check_code = 98 - (reference_val.to_i % 97)

  if check_code < 10
    check_code = "0" + check_code.to_s
  end

  return PREFIX + check_code.to_s + reference
end

.get_char_value(char) ⇒ Object 



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# File 'lib/qr-bills/qr-creditor-reference.rb', line 71

def self.get_char_value(char)
  if char =~ /[0-9]/
    return char.to_i
  end

  return @char_values[char.upcase.to_sym]
end