Paypal ipn listener

listeners_controller.rb

class ListenersController < ApplicationController

  def paypal_ipn
    raw_post = request.raw_post
    notification = ActiveMerchant::Billing::Integrations::Paypal::Notification.new(raw_post)
    @ipn_log = PaypalIpnLog.new(:raw_post => raw_post)

    if development? || notification.acknowledge
      recurring_payment_id = notification.params['recurring_payment_id']
      @ipn_log.recurring_payment_id = recurring_payment_id

      @domain = Domain.find_by_billing_profile_id(recurring_payment_id)
      @ipn_log.domain = @domain

      handler = :"handle_#{notification.type}"
      if respond_to?(handler)
        send(handler, notification)
      else
        @ipn_log.message = "Unsupported operation (#{notification.inspect})"
      end

    else
      @ipn_log.message = "Invalid IPN response (#{notification.inspect})"
    end

    @ipn_log.save
    render :nothing => true
  end

  protected

  def handle_recurring_payment(notification)
    begin
      payment_amount = notification.params['amount'].to_f
      tax_amount = notification.params['tax'].to_f

      # create payment
      payment = Payment.new(
        :domain => @domain,
        :customer => @domain.customer,
        :plan => @domain.plan,
        :amount => payment_amount + tax_amount,
        :from_date => Date.today,
        :to_date => Date.today + 1.month)

      if notification.complete? && @domain.plan.price == payment_amount
        payment.status = Payment::STATUSES[:paid]
        @ipn_log.success = true

        # TODO generate invoice
        
      else
        payment.status = Payment::STATUSES[:unpaid]
        @ipn_log.message = "Transaction is not completed or invalid payment amount (#{notification.inspect})"
      end

      payment.save!
      @ipn_log.payment = payment

    rescue => error
      @ipn_log.message = error.to_s
    end
  end

  def development?
    Rails.env == 'development'
  end

end