Module: EffectivePaypalHelper

Defined in:
app/helpers/effective_paypal_helper.rb

Defined Under Namespace

Classes: ConfigReader

Constant Summary collapse

PAYPAL_CERT_PEM = 
ConfigReader.cert_or_key(:paypal_cert)
APP_CERT_PEM = 
ConfigReader.cert_or_key(:app_cert)
APP_KEY_PEM = 
ConfigReader.cert_or_key(:app_key)

Instance Method Summary collapse

Instance Method Details

#paypal_encrypted_payload(order) ⇒ Object 



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# File 'app/helpers/effective_paypal_helper.rb', line 19

def paypal_encrypted_payload(order)
  raise 'required paypal paypal_cert is missing' unless PAYPAL_CERT_PEM.present?
  raise 'required paypal app_cert is missing' unless APP_CERT_PEM.present?
  raise 'required paypal app_key is missing' 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: '%.2f' % (order.amount_owing / 100.0),
    tax_cart: '%.2f' % ((order.tax + order.surcharge_tax) / 100.0)
  }

  number = 0

  order.order_items.each do |item|
    number += 1

    values["item_number_#{number}"] = number
    values["item_name_#{number}"] = item.name
    values["quantity_#{number}"] = item.quantity
    values["amount_#{number}"] = '%.2f' % (item.price / 100.0)
    values["tax_#{number}"] = '%.2f' % ((item.tax / 100.0) / item.quantity)  # Tax for 1 of these items
  end

  # Credit Card Surcharge
  if order.surcharge != 0
    number += 1

    values["item_number_#{number}"] = number
    values["item_name_#{number}"] = 'Credit Card Surcharge'
    values["quantity_#{number}"] = 1
    values["amount_#{number}"] = '%.2f' % (order.surcharge / 100.0)
    values["tax_#{number}"] = '%.2f' % (order.surcharge_tax / 100.0)
  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