#288 Billing with Stripe

gem 'stripe'

Stripe.api_key = "tGaNWsIG3Qy6zvXB8wv4rEcizJpSXjF4"
STRIPE_PUBLIC_KEY = "pk_KcSyS2qPWdT5SdrwkQg0vNSyhZgqP"

<%= javascript_include_tag "https://js.stripe.com/v1/", "application" %>
<%= tag :meta, :name => "stripe-key", :content => STRIPE_PUBLIC_KEY %>

<%= f.hidden_field :stripe_card_token %>

<div class="field">
  <%= f.label :email %>
  <%= f.text_field :email %>
</div>
<% if @subscription.stripe_card_token.present? %>
  Credit card has been provided.
<% 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>

jQuery ->
  Stripe.setPublishableKey($('meta[name="stripe-key"]').attr('content'))
  subscription.setupForm()

subscription =
  setupForm: ->
    $('#new_subscription').submit ->
      $('input[type=submit]').attr('disabled', true)
      if $('#card_number').length
        subscription.processCard()
        false
      else
        true
  
  processCard: ->
    card =
      number: $('#card_number').val()
      cvc: $('#card_code').val()
      expMonth: $('#card_month').val()
      expYear: $('#card_year').val()
    Stripe.createToken(card, subscription.handleStripeResponse)
  
  handleStripeResponse: (status, response) ->
    if status == 200
      $('#subscription_stripe_card_token').val(response.id)
      $('#new_subscription')[0].submit()
    else
      $('#stripe_error').text(response.error.message)
      $('input[type=submit]').attr('disabled', false)

def create
  @subscription = Subscription.new(params[:subscription])
  if @subscription.save_with_payment
    redirect_to @subscription, :notice => "Thank you for subscribing!"
  else
    render :new
  end
end

attr_accessor :stripe_card_token

def save_with_payment
  if valid?
    customer = Stripe::Customer.create(description: email, plan: plan_id, card: stripe_card_token)
    self.stripe_customer_token = customer.id
    save!
  end
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

rails g migration add_stripe_to_subscriptions stripe_customer_token:string
rake db:migrate