Class: String

Inherits:
Object
  • Object
show all
Defined in:
lib/string_validator.rb

Overview

Add a rut_valid? method to the String class.

Instance Method Summary collapse

Instance Method Details

#rut_valid? ⇒ true, false

Validates if the string has the rut/run syntax and calculates/validate the digit

Returns:

  • (true, false) 


8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/string_validator.rb', line 8

def rut_valid?
  if not(self =~ /\A(\d{7,8})\-(\d{1}|k|K)\Z/i) and not(self =~ /\A(\d{1,3})\.(\d{1,3})\.(\d{1,3})\-(k|K|\d{1})\Z/)
    return false
  end

  results = Array.new
  rut = self.strip.split("-").first.delete(".").to_i
  numerical_serie = 2

  while rut > 0
    results.push (rut % 10) * numerical_serie
    rut = rut / 10
    numerical_serie += 1
    numerical_serie = 2 if numerical_serie > 7 
  end

  digit = 11 - (results.inject(:+) % 11)

  if digit == 10
    digit = "k"
  elsif digit == 11
    digit = "0"
  else
    digit = digit.to_s
  end

  if digit == self.strip.split("-").last.downcase
    return true
  else
    return false
  end
end