Adding invoice action to orders controller, to allow sending of invoice email

app/controllers/spree/admin/orders_controller_decorator.rb

@@ -41,6 +41,14 @@ Spree::Admin::OrdersController.class_eval do
     respond_with(@order) { |format| format.html { redirect_to :back } }
   end
 
+  def invoice
+    pdf = render_to_string pdf: "invoice-#{@order.number}.pdf", template: "spree/admin/orders/invoice", formats: [:html], encoding: "UTF-8"
+    Spree::OrderMailer.invoice_email(@order.id, pdf).deliver
+    flash[:success] = t(:invoice_email_sent)
+
+    respond_with(@order) { |format| format.html { redirect_to edit_admin_order_path(@order) } }
+  end
+
   def update_distribution_charge
     @order.update_distribution_charge!
   end

app/mailers/spree/order_mailer_decorator.rb

@@ -21,4 +21,14 @@ Spree::OrderMailer.class_eval do
          :from => from_address,
          :subject => subject)
   end
+
+  def invoice_email(order, pdf)
+    find_order(order) # Finds an order instance from an id
+    attachments["invoice-#{@order.number}.pdf"] = pdf if pdf.present?
+    subject = "#{Spree::Config[:site_name]} #{t(:invoice)} ##{@order.number}"
+    mail(:to => @order.email,
+         :from => from_address,
+         :subject => subject,
+         :reply_to => @order.distributor.email)
+  end
 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], Spree::Order do |order|
+    can [:read, :update, :fire, :resend, :invoice], 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/overrides/spree/admin/orders/edit/add_invoice_button.html.haml.deface

@@ -0,0 +1,3 @@
+/ insert_after "code[erb-loud]:contains('button_link_to t(:resend)')"
+- if @order.complete?
+  %li= button_link_to t(:invoice), invoice_admin_order_url(@order), :method => :put, :icon => 'icon-email', :data => { :confirm => t(:are_you_sure) }

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

@@ -0,0 +1,15 @@
+= wicked_pdf_stylesheet_link_tag "mail/email"
+
+
+%table{:width => "100%"}
+  %tbody
+    %tr
+      %td{ :align => "left" }
+        = "Order ##{@order.number}"
+      %td{ :align => "right" }
+        - if @order.total_tax > 0
+          = "TAX"
+        = "INVOICE"
+
+= render 'spree/order_mailer/order_summary'
+= render 'spree/order_mailer/payment'

app/views/spree/order_mailer/invoice_email.html.haml

@@ -0,0 +1,10 @@
+%table.social.white-bg{:width => "100%"}
+  %tr
+    %td
+      %h3
+        Hi #{@order.bill_address.firstname},
+      %h4
+        Please find attached an invoice for your recent order from
+        %strong= "#{@order.distributor.name}"
+
+= render 'signoff'

config/locales/en.yml

@@ -35,4 +35,5 @@ en:
   footer_email: "Email"
   footer_links_md: "Links"
   footer_about_url: "About URL"
-  footer_tos_url: "Terms of Service URL"
+  footer_tos_url: "Terms of Service URL"
+  invoice: "Invoice"

config/routes.rb

@@ -204,6 +204,7 @@ Spree::Core::Engine.routes.prepend do
     end
 
     resources :orders do
+      put :invoice, on: :member
       get :managed, on: :collection
     end
   end

spec/controllers/spree/admin/orders_controller_spec.rb

@@ -29,7 +29,7 @@ describe Spree::Admin::OrdersController do
     end
   end
 
-  describe "managed" do
+  describe "#managed" do
     render_views
 
     let(:order_attributes) { [:id, :full_name, :email, :phone, :completed_at, :line_items, :distributor, :order_cycle, :number] }
@@ -164,4 +164,41 @@ describe Spree::Admin::OrdersController do
       end
     end
   end
+
+  describe "#invoice" 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 :invoice, 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 :invoice, 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
+          # expect do
+            spree_get :invoice, params
+          # end.to change{Spree::OrderMailer.deliveries.count}.by(1)
+          expect(response).to redirect_to spree.edit_admin_order_path(order)
+        end
+      end
+    end
+  end
 end