Added os method to Template model

app/models/tim/template.rb

@@ -10,10 +10,25 @@ class Template < Tim::Base
     attr_accessible :xml
     attr_protected :id
 
+    OS = Struct.new(:name, :version, :arch)
+
     # Used in views to display the xml elements of this template
     def xml_elements
-      ::Nokogiri::XML::Document.parse(xml).xpath("//template/*").to_xml
+      parsed_xml.xpath("//template/*").to_xml
+    end
+
+    def os
+      OS.new(
+        parsed_xml.xpath("//template/os/name").text,
+        parsed_xml.xpath("//template/os/version").text,
+        parsed_xml.xpath("//template/os/arch").text
+      )
     end
 
+    private
+
+    def parsed_xml
+      @parsed_xml ||= ::Nokogiri::XML::Document.parse(xml)
+    end
   end
-end
+end

spec/models/template_spec.rb

@@ -12,5 +12,14 @@ module Tim
         Template.find(template).base_images.size.should == 2
       end
     end
+
+    describe "XML helper methods" do
+      it 'should return os struct' do
+        os = FactoryGirl.build(:template).os
+        os.name.should == 'Fedora'
+        os.version.should == '15'
+        os.arch.should == 'x86_64'
+      end
+    end
   end
-end
+end