Module: ValidatesCpf::Cpf

Defined in:
lib/validates_cpf/cpf.rb

Constant Summary collapse

@@invalid_cpfs = 
%w{12345678909 11111111111 22222222222 33333333333 44444444444 55555555555 66666666666 77777777777 88888888888 99999999999 00000000000}

Class Method Summary collapse

Class Method Details

.valid?(value) ⇒ Boolean

Returns:

  • (Boolean) 


5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/validates_cpf/cpf.rb', line 5

def self.valid?(value)
  value.gsub!(/[^0-9]/, '')

  return false if @@invalid_cpfs.member?(value)

  digit = value.slice(-2, 2)
  control = ''
  if value.size == 11
    factor = 0
    2.times do |i|
      sum = 0
      9.times do |j|
        sum += value.slice(j, 1).to_i * (10 + i - j)
      end
      sum += (factor * 2) if i == 1
      factor = (sum * 10) % 11
      factor = 0 if factor == 10
      control << factor.to_s
    end
  end
  control == digit
end