Module: EffectivePaypalHelper

Defined in:
app/helpers/effective_paypal_helper.rb

Constant Summary collapse

PAYPAL_CERT_PEM =

These’re constants so they only get read once, not every order request

(File.read(EffectiveOrders.paypal[:paypal_cert]) rescue {})
APP_CERT_PEM = 
(File.read(EffectiveOrders.paypal[:app_cert]) rescue {})
APP_KEY_PEM = 
(File.read(EffectiveOrders.paypal[:app_key]) rescue {})

Instance Method Summary collapse

Instance Method Details

#paypal_encrypted_payload(order) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'app/helpers/effective_paypal_helper.rb', line 7

def paypal_encrypted_payload(order)
  raise ArgumentError.new("unable to read EffectiveOrders PayPal paypal_cert #{EffectiveOrders.paypal[:paypal_cert]}") unless PAYPAL_CERT_PEM.present?
  raise ArgumentError.new("unable to read EffectiveOrders PayPal app_cert #{EffectiveOrders.paypal[:app_cert]}") unless APP_CERT_PEM.present?
  raise ArgumentError.new("unable to read EffectiveOrders PayPal app_key #{EffectiveOrders.paypal[:app_key]}") unless APP_KEY_PEM.present?

  values = {
    :business => EffectiveOrders.paypal[:seller_email],
    :custom => EffectiveOrders.paypal[:secret],
    :cmd => '_cart',
    :upload => 1,
    :return => effective_orders.order_purchased_url(order),
    :notify_url => effective_orders.paypal_postback_url,
    :cert_id => EffectiveOrders.paypal[:cert_id],
    :currency_code => EffectiveOrders.paypal[:currency],
    :invoice => order.id,
    :amount => (order.subtotal / 100.0).round(2),
    :tax_cart => (order.tax / 100.0).round(2)
  }

  order.order_items.each_with_index do |item, x|
    values["item_number_#{x+1}"] = x+1
    values["item_name_#{x+1}"] = item.title
    values["quantity_#{x+1}"] = item.quantity
    values["amount_#{x+1}"] = '%.2f' % (item.price / 100.0)
    values["tax_#{x+1}"] = '%.2f' % ((item.tax / 100.0) / item.quantity)  # Tax for 1 of these items
  end

  signed = OpenSSL::PKCS7::sign(OpenSSL::X509::Certificate.new(APP_CERT_PEM), OpenSSL::PKey::RSA.new(APP_KEY_PEM, ''), values.map { |k, v| "#{k}=#{v}" }.join("\n"), [], OpenSSL::PKCS7::BINARY)
  OpenSSL::PKCS7::encrypt([OpenSSL::X509::Certificate.new(PAYPAL_CERT_PEM)], signed.to_der, OpenSSL::Cipher::Cipher::new("DES3"), OpenSSL::PKCS7::BINARY).to_s.gsub("\n", "")
end