Adding new route for printing an order to pdf

app/controllers/spree/admin/orders_controller_decorator.rb

@@ -49,6 +49,10 @@ Spree::Admin::OrdersController.class_eval do
     respond_with(@order) { |format| format.html { redirect_to edit_admin_order_path(@order) } }
   end
 
+  def print
+    render pdf: "invoice-#{@order.number}", encoding: "UTF-8"
+  end
+
   def update_distribution_charge
     @order.update_distribution_charge!
   end

app/models/spree/ability_decorator.rb

@@ -142,7 +142,7 @@ class AbilityDecorator
   def add_order_management_abilities(user)
     # Enterprise User can only access orders that they are a distributor for
     can [:index, :create], Spree::Order
-    can [:read, :update, :fire, :resend, :invoice], Spree::Order do |order|
+    can [:read, :update, :fire, :resend, :invoice, :print], Spree::Order do |order|
       # We allow editing orders with a nil distributor as this state occurs
       # during the order creation process from the admin backend
       order.distributor.nil? || user.enterprises.include?(order.distributor)

app/views/spree/admin/orders/print.html.haml

@@ -0,0 +1,19 @@
+= wicked_pdf_stylesheet_link_tag "mail/email"
+
+
+%table{:width => "100%"}
+  %tbody
+    %tr
+      %td{ :align => "left" }
+        %h4
+          Order confirmation
+          %strong ##{@order.number}
+        %h5
+          #{@order.bill_address.firstname} #{@order.bill_address.lastname}
+          %strong= " <#{@order.email}>" if @order.email
+          = @order.bill_address.phone if @order.bill_address.phone
+        %h5= "Customer Code: #{@order.customer.code}"
+
+= render 'spree/order_mailer/order_summary'
+= render 'spree/order_mailer/payment'
+= render 'spree/order_mailer/shipping'

config/routes.rb

@@ -205,6 +205,7 @@ Spree::Core::Engine.routes.prepend do
 
     resources :orders do
       put :invoice, on: :member
+      get :print, on: :member
       get :managed, on: :collection
     end
   end

spec/controllers/spree/admin/orders_controller_spec.rb

@@ -201,4 +201,39 @@ describe Spree::Admin::OrdersController do
       end
     end
   end
+
+  describe "#print" do
+    let!(:user) { create(:user) }
+    let!(:enterprise_user) { create(:user) }
+    let!(:order) { create(:order_with_distributor, bill_address: create(:address), ship_address: create(:address)) }
+    let!(:distributor) { order.distributor }
+    let(:params) { { id: order.number } }
+
+    context "as a normal user" do
+      before { controller.stub spree_current_user: user }
+
+      it "should prevent me from sending order invoices" do
+        spree_get :print, params
+        expect(response).to redirect_to spree.unauthorized_path
+      end
+    end
+
+    context "as an enterprise user" do
+      context "which is not a manager of the distributor for an order" do
+        before { controller.stub spree_current_user: user }
+        it "should prevent me from sending order invoices" do
+          spree_get :print, params
+          expect(response).to redirect_to spree.unauthorized_path
+        end
+      end
+
+      context "which is a manager of the distributor for an order" do
+        before { controller.stub spree_current_user: distributor.owner }
+        it "should allow me to send order invoices" do
+          spree_get :print, params
+          expect(response).to render_template :print
+        end
+      end
+    end
+  end
 end