Class: Gemgento::CreditCardValidator

Inherits:
ActiveModel::Validator
  • Object
show all
Defined in:
app/validators/gemgento/credit_card_validator.rb

Instance Method Summary collapse

Instance Method Details

#card_number ⇒ Object

Validate credit card number with a Luhn test. Based on rosettacode.org/wiki/Luhn_test_of_credit_card_numbers#Ruby



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# File 'app/validators/gemgento/credit_card_validator.rb', line 12

def card_number
  s1 = s2 = 0
  cc_number = @record.cc_number.gsub(/\D/, '') # remove all white space

  cc_number.to_s.reverse.chars.each_slice(2) do |odd, even|
    s1 += odd.to_i

    double = even.to_i * 2
    double -= 9 if double >= 10
    s2 += double
  end

  if (s1 + s2) % 10 != 0
    @record.errors[:cc_number] << 'is invalid'
  end
end

#expiration_date ⇒ Object 



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# File 'app/validators/gemgento/credit_card_validator.rb', line 29

def expiration_date
  year = @record.cc_exp_year.to_i
  month = @record.cc_exp_month.to_i

  if year < Time.now.year
    @record.errors[:cc_exp_month] = 'cannot be in the past'
  elsif (year == Time.now.year && month < Time.now.month)
    @record.errors[:cc_exp_month] = 'cannot be in the past'
  end
end

#security_code ⇒ Object 



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# File 'app/validators/gemgento/credit_card_validator.rb', line 40

def security_code
  if (@record.cc_cid.length < 3 || @record.cc_cid.length > 4) || # between 3 and 4 digits
      @record.cc_cid.gsub(/\D/, '') != @record.cc_cid || # numbers only
      !(1..9999).include?(@record.cc_cid.to_i)

    @record.errors[:cc_cid] << 'is invalid'
  end
end

#validate(record) ⇒ Object 



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# File 'app/validators/gemgento/credit_card_validator.rb', line 3

def validate(record)
  @record = record
  card_number
  expiration_date
  security_code
end