Move sending of PDF into new ActiveSupport::Concern

app/controllers/concerns/send_order_pdf.rb

@@ -0,0 +1,17 @@
+module Concerns::SendOrderPdf
+  extend ActiveSupport::Concern
+
+  protected
+
+  def send_order_pdf order, document
+    klass = case document
+            when 'groups'   then OrderByGroups
+            when 'articles' then OrderByArticles
+            when 'fax'      then OrderFax
+            when 'matrix'   then OrderMatrix
+          end
+    pdf = klass.new order
+    send_data pdf.to_pdf, filename: pdf.filename, type: 'application/pdf'
+  end
+
+end