Changes for purchases - handle different type of purchases

lib/central_server_exchange_app.rb

@@ -28,11 +28,16 @@ class CentralServerExchangeApp < Sinatra::Base
     end
   end
   
-  post '/purchase/design' do
+  post '/purchase/:type' do
     begin
       private_key = OpenSSL::PKey::RSA.new(@site.private_key)
-      p_design = PDesign.new.from_json(private_key.private_decrypt(request.params['purchase']))
-      p_design.save
+
+      case params[:type]
+        when 'Design'
+          purchase = PDesign.new.from_json(private_key.private_decrypt(request.params['purchase']))
+      end
+      
+      purchase.save
       body 'true'
     rescue
       body 'false'