Sha256: 3291db10e3127debb8fcd3748e64ffb9662ce4f092658afe4027d855c0fab906
Contents?: true
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Versions: 8
Compression:
Stored size: 1.82 KB
Contents
module ActiveModel
module Validations
class CreditCardValidator < EachValidator
def validate_each(record, attribute, value)
type = options.fetch(:type, :any)
record.errors.add(attribute) if value.blank? || !Luhn.valid?(type, sanitize_card(value))
end
def sanitize_card(value)
value.tr('- ','')
end
class Luhn
def self.valid?(card_type,number)
if card_type == :any
self.luhn_valid?(number)
else
self.send("#{card_type.to_s}?", number)
end
end
def self.mastercard?(number)
self.luhn_valid?(number) and !(number !~ /^5[1-5].{14}/)
end
class << self
alias :master_card? :mastercard?
end
def self.visa?(number)
self.luhn_valid?(number) and !(number !~ /^4.{15}/)
end
def self.amex?(number)
self.luhn_valid?(number) and !(number !~ /^3[47].{13}/)
end
[:diners_club, :en_route, :discover, :jcb, :carte_blanche, :switch,
:solo, :laser].each do |card_type|
class_eval <<-VALIDATOR, __FILE__, __LINE__ + 1
def self.#{card_type}?(number)
self.luhn_valid?(number)
end
VALIDATOR
end
def self.luhn_valid?(s)
return false unless s && s.is_a?(String)
return false if s.empty?
value = s.gsub(/\D/, '')
return false if value.empty?
value.
reverse.
each_char.
collect(&:to_i).
each_with_index.
inject(0) {| num, (i, index) |
num + if (index + 1) % 2 == 0
i*=2; ((i > 9) ? (i % 10) + 1 : i)
else
i
end
} % 10 == 0
end
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems