#289 PayPal Recurring Billing pro

gem 'paypal-recurring'

rails g migration add_paypal_to_subscriptions paypal_customer_token:string paypal_recurring_profile_token:string
rake db:migrate

PayPal::Recurring.configure do |config|
  config.sandbox = true
  config.username = "seller_1318199877_biz_api1.railscasts.com"
  config.password = "1318199913"
  config.signature = "AiPC9BjkCyDFQXbSkoZcgqH3hpacA8A8VR5V3XCWZrbuhAAnOSWnbvGl"
end

get 'paypal/checkout', to: 'subscriptions#paypal_checkout'

def new
  plan = Plan.find(params[:plan_id])
  @subscription = plan.subscriptions.build
  if params[:PayerID]
    @subscription.paypal_customer_token = params[:PayerID]
    @subscription.paypal_payment_token = params[:token]
    @subscription.email = @subscription.paypal.checkout_details.email
  end
end

def paypal_checkout
  plan = Plan.find(params[:plan_id])
  subscription = plan.subscriptions.build
  redirect_to subscription.paypal.checkout_url(
    return_url: new_subscription_url(:plan_id => plan.id),
    cancel_url: root_url
  )
end

attr_accessor :stripe_card_token, :paypal_payment_token

def save_with_payment
  if valid?
    if paypal_payment_token.present?
      save_with_paypal_payment
    else
      save_with_stripe_payment
    end
  end
end

def paypal
  PaypalPayment.new(self)
end

def save_with_paypal_payment
  response = paypal.make_recurring
  self.paypal_recurring_profile_token = response.profile_id
  save!
end

def save_with_stripe_payment
  customer = Stripe::Customer.create(description: email, plan: plan_id, card: stripe_card_token)
  self.stripe_customer_token = customer.id
  save!
rescue Stripe::InvalidRequestError => e
  logger.error "Stripe error while creating customer: #{e.message}"
  errors.add :base, "There was a problem with your credit card."
  false
end

def payment_provided?
  stripe_card_token.present? || paypal_payment_token.present?
end

class PaypalPayment
  def initialize(subscription)
    @subscription = subscription
  end
  
  def checkout_details
    process :checkout_details
  end
  
  def checkout_url(options)
    process(:checkout, options).checkout_url
  end
  
  def make_recurring
    process :request_payment
    process :create_recurring_profile, period: :monthly, frequency: 1, start_at: Time.zone.now
  end
  
private

  def process(action, options = {})
    options = options.reverse_merge(
      token: @subscription.paypal_payment_token,
      payer_id: @subscription.paypal_customer_token,
      description: @subscription.plan.name,
      amount: @subscription.plan.price,
      currency: "USD"
    )
    response = PayPal::Recurring.new(options).send(action)
    raise response.errors.inspect if response.errors.present?
    response
  end
end

<%= f.hidden_field :plan_id %>
<%= f.hidden_field :stripe_card_token %>
<%= f.hidden_field :paypal_customer_token %>
<%= f.hidden_field :paypal_payment_token %>

<% unless @subscription.payment_provided? %>
<div class="field">
  <%= radio_button_tag :pay_with, :card, true %>
  <%= label_tag :pay_with_card do %>
    <%= image_tag "visa.png" %>
    <%= image_tag "mastercard.png" %>
    <%= image_tag "discover.png" %>
    <%= image_tag "american_express.png" %>
    <%= image_tag "jcb.png" %>
  <% end %>
  <%= radio_button_tag :pay_with, :paypal %>
  <%= label_tag :pay_with_paypal do %>
    <%= image_tag "paypal.png" %>
  <% end %>
</div>
<% end %>

<div id="paypal_checkout" style="display:none">
  <%= link_to image_tag("https://www.paypal.com/en_US/i/btn/btn_xpressCheckout.gif"), paypal_checkout_path(plan_id: @subscription.plan_id) %>
</div>

<div id="billing_fields">
  <div class="field">
    <%= f.label :email %>
    <%= f.text_field :email %>
  </div>
  <% if @subscription.payment_provided? %>
    Payment has been provided. Click "Subscribe" to complete the subscription.
  <% else %>
    <div class="field">
      <%= label_tag :card_number, "Credit Card Number" %>
      <%= text_field_tag :card_number, nil, name: nil %>
    </div>
    <div class="field">
      <%= label_tag :card_code, "Security Code on Card (CVV)" %>
      <%= text_field_tag :card_code, nil, name: nil %>
    </div>
    <div class="field">
      <%= label_tag :card_month, "Card Expiration" %>
      <%= select_month nil, {add_month_numbers: true}, {name: nil, id: "card_month"} %>
      <%= select_year nil, {start_year: Date.today.year, end_year: Date.today.year+15}, {name: nil, id: "card_year"} %>
    </div>
  <% end %>
  <div id="stripe_error">
    <noscript>JavaScript is not enabled and is required for this form. First enable it in your web browser settings.</noscript>
  </div>
  <div class="actions">
    <%= f.submit "Subscribe" %>
  </div>
</div>

# ...
$('#pay_with_paypal').click ->
  $('#paypal_checkout').show()
  $('#billing_fields').hide()
  true
$('#pay_with_card').click ->
  $('#paypal_checkout').hide()
  $('#billing_fields').show()
  true