Paypal express button on cart step

app/controllers/spree/checkout_controller_decorator.rb

@@ -101,9 +101,15 @@ def paypal_confirm
           @order.ship_address = order_ship_address
           @order.bill_address ||= order_ship_address
 
+          @order.email ||= @ppx_details.params["payer"]
+
           #Add Instant Update Shipping
           if payment_method.preferred_cart_checkout
             add_shipping_charge
+
+            unless @order.adjustments.tax.exists?
+              @order.create_tax_charge!
+            end
           end
 
         end
@@ -359,7 +365,7 @@ def shipping_options
       end
 
       {
-        :callback_url      => spree.root_url + "paypal_shipping_update",
+        :callback_url      => spree.root_url + "paypal_shipping_update/#{@order.number}",
         :callback_timeout  => 6,
         :callback_version  => '61.0',
         :shipping_options  => shipping_default
@@ -492,5 +498,11 @@ def estimate_shipping_for_user
       @rate_hash_user = @shipping_order.rate_hash
       #TODO
     end
+
+    def skip_state_validation_with_paypal_express?
+      %w(paypal_checkout paypal_payment paypal_confirm paypal_finish).include?(action_name) or skip_state_validation_without_paypal_express?
+    end
+    alias_method_chain :skip_state_validation?, :paypal_express
+
   end
 end

app/controllers/spree/paypal_express_callbacks_controller.rb

@@ -47,8 +47,8 @@ def shipping_estimate
       estimate_shipping_and_taxes
 
       payment_methods_atts2 = {}
-      @rate_hash.each_with_index do |shipping_method, idx|
-        payment_methods_atts2["L_TAXAMT#{idx}"] = @order.tax_total #TODO need to calculate based on shipping method
+      @shipping_and_taxes.each_with_index do |(shipping_method, tax_total), idx|
+        payment_methods_atts2["L_TAXAMT#{idx}"] = tax_total
         payment_methods_atts2["L_SHIPPINGOPTIONAMOUNT#{idx}"] = shipping_method.cost
         payment_methods_atts2["L_SHIPPINGOPTIONNAME#{idx}"] = shipping_method.name
         payment_methods_atts2["L_SHIPPINGOPTIONLABEL#{idx}"] = "Shipping" #Do not change, required field
@@ -73,17 +73,21 @@ def retrieve_details
       end
 
       def estimate_shipping_and_taxes
-        @order = Spree::Order.find_by_number(current_order(true).number)
-        zipcode = @zip
-        shipping_methods = Spree::ShippingMethod.all
+        @order = Spree::Order.find_by_number(params[:id])
         #TODO remove hard coded shipping
         #Make a deep copy of the order object then stub out the parts required to get a shipping quote
         @shipping_order = Marshal::load(Marshal.dump(@order)) #Make a deep copy of the order object
-        @shipping_order.ship_address = Spree::Address.new(:country => Spree::Country.find_by_iso("#{@country}"), :zipcode => zipcode)
+        @shipping_order.ship_address = Spree::Address.new(:country => Spree::Country.find_by_iso("#{@country}"), :zipcode => @zip)
         shipment = Spree::Shipment.new(:address => @shipping_order.ship_address)
         @shipping_order.ship_address.shipments<<shipment
         @shipping_order.shipments<<shipment
-        @rate_hash = @shipping_order.rate_hash
+        @shipping_and_taxes = @shipping_order.rate_hash.map do |shipping_method|
+          #TODO need to calculate based on shipping method
+          tax_total = TaxRate.match(@shipping_order).sum do |rate|
+            rate.compute_amount(@shipping_order)
+          end
+          [shipping_method, tax_total]
+        end
       end
 
   end

app/overrides/spree/orders/edit/add_paypalexpress_button.html.erb.deface

@@ -0,0 +1,5 @@
+<!--
+  insert_bottom '[data-hook=cart_buttons]'
+-->
+  <%= render :partial => 'spree/orders/cart_paypalexpress_button' %>
+

app/views/spree/orders/_cart_paypalexpress_button.html.erb

@@ -0,0 +1,10 @@
+  <% @order.available_payment_methods.each do |payment_method| %>
+    <% if payment_method.method_type.start_with?('paypalexpress') and payment_method.preferred_cart_checkout %>
+      <a href="<%= paypal_payment_order_checkout_url @order, :payment_method_id => payment_method.id %>">
+        <img src="https://www.paypal.com/en_US/i/btn/btn_xpressCheckout.gif" />
+      </a>
+    <% end %>
+  <% end %>
+
+
+

config/routes.rb

@@ -12,7 +12,7 @@
 
   match '/paypal_notify' => 'paypal_express_callbacks#notify', :via => [:get, :post]
 
-  match '/paypal_shipping_update' => 'paypal_express_callbacks#shipping_estimate', :via => :post
+  match '/paypal_shipping_update/:id' => 'paypal_express_callbacks#shipping_estimate', :via => :post
 
   namespace :admin do
     resources :orders do