Class: CreditCardValidator::Validator

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

Class Method Summary collapse

Class Method Details

.card_type(number) ⇒ Object 



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# File 'lib/credit_card_validator/validator.rb', line 30

def card_type(number)
  CARD_TYPES.keys.each do |t|
    return t.to_s if card_is(t, number)
  end
  nil
end

.is_allowed_card_type?(number) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/credit_card_validator/validator.rb', line 37

def is_allowed_card_type?(number)
  card_type = card_type(number)
  if options[:allowed_card_types] and options[:allowed_card_types].respond_to?('include?')
    options[:allowed_card_types].include?(card_type.to_sym)
  else
    !card_type.nil?
  end
end

.is_test_number(number) ⇒ Object 



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# File 'lib/credit_card_validator/validator.rb', line 46

def is_test_number(number)
  TEST_NUMBERS.include?(strip(number))
end

.options ⇒ Object 



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# File 'lib/credit_card_validator/validator.rb', line 26

def options
  @@options ||= {}
end

.valid?(number) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/credit_card_validator/validator.rb', line 19

def valid?(number)
  is_allowed_card_type?(number) and
    verify_luhn(number) and
    card_type(number) and
    (options[:test_numbers_are_valid] ? true : !is_test_number(number))
end

.verify_luhn(number) ⇒ Object 



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# File 'lib/credit_card_validator/validator.rb', line 50

def verify_luhn(number)
  total = strip(number).reverse().split(//).inject([0,0]) do |accum,n|
    n = n.to_i
    accum[0] += (accum[1] % 2 == 1  ? rotate(n * 2)  : n)
    accum[1] += 1
    accum
  end
  
  (total[0] % 10 == 0)
end