CreditCardSupport

Intro

Internationalization and localization support for validations
At the moment knows AMEX, DinersClub, Discover, Enroute, Maestro, MasterCard, JCB, Solo, VISA (if you need more, create an issue and request for it :)

Installation

Into your Gemfile add:

gem 'credit_card_support'

Or in shell:

gem install credit_card_support

Basic usage

# for a String object
credit_card_number = "5500005555555559"
credit_card_number.extend(CreditCardSupport::CreditCardNumber)

# or for all the Strings
class String
  include CreditCardSupport::CreditCardNumber
end

# Usage
credit_card_number.luhn?   # true
credit_card_number.issuer  # :visa
credit_card_number.test?   # true

For better understanding read the source and RSpec.

Validations support

validates Luhn (http://en.wikipedia.org/wiki/Luhn_algorithm)
validates issuer
validates that number is not a test number
for presence, length etc, please use Rails already existing validators :)

Define

ActiveRecord or Mongoid

class CreditCard < ActiveRecord::Base

  attr_accessible :number

  validates :number, presence: true,
                      length: {
                        minimum: 13,
                        maximum: 19
                        },
                      credit_card_number: {
                        allow_testcards: true,
                        allow_issuers: [:visa, :master_card]
                      }

end

Only ActiveModel

Rails 3

class CreditCard
  extend  ActiveModel::Naming
  extend  ActiveModel::Translation
  include ActiveModel::Validations
  include ActiveModel::Conversion

  attr_accessor :number, :expiry_year, :expiry_month, :errors

  def initialize(opts={})
    @errors = ActiveModel::Errors.new(self)
    opts.each {|key, value| send("#{key}=", value) }
  end

  validates :number, presence: true,
                      length: {
                        minimum: 13,
                        maximum: 19
                        },
                      credit_card_number: {
                        allow_testcards: true,
                        allow_issuers: [:visa, :master_card]
                      }

end

Rails 4

class CreditCard
  include ActiveModel::Model

  attr_accessor :number, :expiry_year, :expiry_month

  validates :number, presence: true,
                      length: {
                        minimum: 13,
                        maximum: 19
                        },
                      credit_card_number: {
                        allow_testcards: true,
                        allow_issuers: [:visa, :master_card]
                      }

end

Use

After you have defined your CreditCard

today      = Date.today

creditcard = CreditCard.new(number: '4000111111111115')
creditcard.valid?             # true

# in case of allow_testcards is set to false
creditcard.valid?             # false
creditcard.errors             # <ActiveModel::Errors: ... @messages={:number=>["testcards not supported"]}>

credit_card_support

Development

Runtime

CreditCardSupport

Intro

Installation

Basic usage

Validations support

Define

ActiveRecord or Mongoid

Only ActiveModel

Rails 3

Rails 4

Use

Problems?

Inspired by

Author