Add ability to walkthrough PayPal Express Checkout

Please see issues for what else needs doing.

app/controllers/spree/paypal_controller.rb

@@ -0,0 +1,69 @@
+module Spree
+  class PaypalController < Spree::StoreController
+    def express
+      # TODO: support adjustments
+      # Check out the old spree_paypal_express for how it does this
+      # Specifically, look for "credits" in CheckoutController decorator
+      items = current_order.line_items.map do |item|
+        { name: item.variant.name,
+          description: item.variant.description[0..120],
+          quantity: item.quantity,
+          # TODO: For 2.1.0, make this just item.money.cents
+          amount: item.money.money.cents }
+      end
+
+      # TODO: For 2.1.0, make this display_item_total.cents
+      response = provider.setup_purchase(current_order.display_item_total.money.cents,
+        ip: request.remote_ip,
+        return_url: confirm_paypal_url(:payment_method_id => params[:payment_method_id]),
+        cancel_return_url: cancel_paypal_url,
+        currency: Spree::Config[:currency],
+        locale: I18n.locale.to_s.sub(/-/, '_'),
+        brand_name: Spree::Config[:site_name],
+        address: address_options,
+        header_image: 'http://teclacolorida.com/assets/images/logos/schoooools.png',
+        allow_guest_checkout: 'true',   #payment with credit card for non PayPal users
+        items: items
+      )
+
+      redirect_to provider.redirect_url_for(response.token)
+    end
+
+    def confirm
+      details = provider.details_for(params[:token])
+      payer_id = details.payer_id
+      # TODO: For 2.1.0, make this display_item_total.cents 
+      response = provider.purchase(current_order.display_item_total.money.cents, {
+        ip: request.remote_addr,
+        token: params[:token],
+        payer_id: payer_id,
+        currency: Spree::Config[:currency]
+      })
+      # TODO: Add payment to order
+    end
+
+    def cancel
+      binding.pry
+
+    end
+
+    private
+
+    def provider
+      Spree::PaymentMethod.find(params[:payment_method_id]).provider
+    end
+
+    def address_options
+      {
+        :name => current_order.bill_address.try(:full_name),
+        :zip => current_order.bill_address.zipcode,
+        :address1 => current_order.bill_address.address1,
+        :address2 => current_order.bill_address.address2,
+        :city => current_order.bill_address.city,
+        :phone => current_order.bill_address.phone,
+        :state => current_order.bill_address.state_text,
+        :country => current_order.bill_address.country.iso
+      }
+    end
+  end
+end

app/models/gateway/pay_pal_express.rb → app/models/spree/gateway/pay_pal_express.rb

@@ -7,7 +7,11 @@ class Gateway::PayPalExpress < Gateway
     attr_accessible :preferred_login, :preferred_password, :preferred_signature
 
     def provider_class
-      ActiveMerchant::Billing::PaypalGateway
+      ActiveMerchant::Billing::PaypalExpressGateway
+    end
+
+    def method_type
+      'paypal'
     end
   end
 end

app/views/spree/checkout/payment/_paypal.html.erb

@@ -0,0 +1 @@
+<%= link_to(image_tag("https://www.paypal.com/en_US/i/btn/btn_xpressCheckout.gif"), paypal_express_url(:payment_method_id => payment_method.id), :method => :post) %>

config/routes.rb

@@ -1,3 +1,6 @@
 Spree::Core::Engine.routes.draw do
-  # Add your extension routes here
+  post '/paypal', :to => "paypal#express", :as => :paypal_express
+  get '/paypal/confirm', :to => "paypal#confirm", :as => :confirm_paypal
+  get '/paypal/cancel', :to => "paypal#cancel", :as => :cancel_paypal
+
 end

lib/spree_paypal_express/engine.rb

@@ -20,7 +20,7 @@ def self.activate
     config.to_prepare &method(:activate).to_proc
 
     initializer "spree.paypal_express.payment_methods", :after => "spree.register.payment_methods" do |app|
-      app.config.spree.payment_methods << Spree::Gateway::PaypalExpress
+      app.config.spree.payment_methods << Spree::Gateway::PayPalExpress
     end
   end
 end