Add a step to the order process

gistfile1.rb

Order.class_eval do
  state_machine :initial => :cart, :use_transactions => false do
    event :next do
      transition :from => 'cart', :to => 'orderdetails'
      transition :from => 'orderdetails', :to => 'address'
      transition :from => 'address',  :to => 'delivery'
      transition :from => 'delivery', :to => 'payment', :if => :payment_required?
      transition :from => 'delivery', :to => 'complete'
      transition :from => 'confirm',  :to => 'complete'

      # note: some payment methods will not support a confirm step
      transition :from => 'payment',  :to => 'confirm',
                                      :if => Proc.new { Gateway.current && Gateway.current.payment_profiles_supported? }

      transition :from => 'payment', :to => 'complete'
    end

    event :cancel do
      transition :to => 'canceled', :if => :allow_cancel?
    end
    event :return do
      transition :to => 'returned', :from => 'awaiting_return'
    end
    event :resume do
      transition :to => 'resumed', :from => 'canceled', :if => :allow_resume?
    end
    event :authorize_return do
      transition :to => 'awaiting_return'
    end

    before_transition :to => 'complete' do |order|
      begin
        order.process_payments!
      rescue Spree::GatewayError
        if Spree::Config[:allow_checkout_on_gateway_error]
          true
        else
          false
        end
      end
    end

    after_transition :to => 'complete', :do => :finalize!
    after_transition :to => 'delivery', :do => :create_tax_charge!
    after_transition :to => 'payment', :do => :create_shipment!
    after_transition :to => 'canceled', :do => :after_cancel

  end
end