Class: ActiveModel::Validations::BrCnpjValidator

Inherits:
EachValidator
  • Object
show all
Defined in:
lib/custom_validations/br_cnpj_validator.rb

Constant Summary collapse

BLACK_LIST = 
%w(00000000000000 11111111111111 22222222222222 33333333333333
44444444444444 55555555555555 66666666666666 77777777777777
88888888888888 99999999999999)

Instance Method Summary collapse

Instance Method Details

#valid_cnpj?(cnpj) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/custom_validations/br_cnpj_validator.rb', line 15

def valid_cnpj? cnpj

  begin
    cnpj = (cnpj.is_a?(String) ? cnpj : cnpj.to_s)
  rescue Exception => exc
    return false
  end

  # could be 13 or 14 digits or with mask 99.999.999/9999-99
  if cnpj !~ /^\d{13,14}$|\d{2}\.\d{3}\.\d{3}\/\d{4}\-\d{2}$/
    return false
  end

  cnpj = cnpj.scan(/\d/).collect(&:to_i)
  cnpj.unshift(0) if cnpj.length == 13

  # filter black list
  if BLACK_LIST.include? cnpj.join
    return false
  end

  # calculate first digit
  factor = [5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2]

  sum = (0..11).inject(0) do |sum, i|
    sum + cnpj[i] * factor[i]
  end

  result = sum % 11
  result = result < 2 ? 0 : 11 - result

  if result != cnpj[12]
    return false
  end

  # calculate second digit
  factor.unshift 6

  sum = (0..12).inject(0) do |sum, i|
    sum + cnpj[i] * factor[i]
  end

  result = sum % 11
  result = result < 2 ? 0 : 11 - result

  result == cnpj[13]
end

#validate_each(record, attribute, value) ⇒ Object 



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# File 'lib/custom_validations/br_cnpj_validator.rb', line 10

def validate_each(record, attribute, value)
  return if value.to_s.blank? # it doesn't validate presence
  record.errors.add(attribute, :br_cnpj, options) unless valid_cnpj?(value.to_s)
end