Class: Business::BR::CNPJ

Inherits:
Object
  • Object
show all
Defined in:
lib/business-br/cnpj.rb

Instance Method Summary collapse

Instance Method Details

#format(cnpj) ⇒ Object 



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# File 'lib/business-br/cnpj.rb', line 41

def format(cnpj)
  if cnpj =~ %r{^(\d{2})\.?(\d{3})\.?(\d{3})/?(\d{4})-?(\d{2})$}
    "#{Regexp.last_match(1)}.#{Regexp.last_match(2)}.#{Regexp.last_match(3)}/#{Regexp.last_match(4)}-#{Regexp.last_match(5)}"
  end
end

#normalize(cnpj) ⇒ Object 



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# File 'lib/business-br/cnpj.rb', line 35

def normalize(cnpj)
  if cnpj =~ %r{^(\d{2})\.?(\d{3})\.?(\d{3})/?(\d{4})-?(\d{2})$}
    "#{Regexp.last_match(1)}#{Regexp.last_match(2)}#{Regexp.last_match(3)}#{Regexp.last_match(4)}#{Regexp.last_match(5)}"
  end
end

#validate(cnpj) ⇒ Object 



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# File 'lib/business-br/cnpj.rb', line 5

def validate(cnpj)
  return false unless cnpj
  return false unless cnpj.length == 14 || cnpj.length == 18
  return false unless cnpj =~ %r{^\d{2}\.?\d{3}\.?\d{3}/?\d{4}-?\d{2}$}

  cnpj = normalize(cnpj)
  numbers = [6, 5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2]

  first_num = 0
  second_num = 0

  12.times do |i|
    first_num += numbers[i + 1] * cnpj[i].to_i
  end

  13.times do |i|
    second_num += numbers[i] * cnpj[i].to_i
  end

  first_num %= 11
  first_num = first_num < 2 ? 0 : (11 - first_num)

  second_num %= 11
  second_num = second_num < 2 ? 0 : (11 - second_num) == 10 ? 1 : (11 - second_num)

  return false unless cnpj[12..13] == "#{first_num}#{second_num}"

  true
end