Refactor controller's code.

controller.rb

def update
  if params[:credit_card]
    #process order
    response = @order.process(params)
    if response[:status] == "success"
      render :template => "orders/show"
    else
      render :json => response
    end
  else
    if params[:shipping_contact].size > 0  && 	params[:shipping_address].size > 0
      @order.create_shipping_contact(params[:shipping_contact],params[:shipping_address])
    end
    render :template => "orders/show"
  end
end