Separate model data conversion methods

This allows storing the data in its expected format outside of CMDB
calls

lib/liudesk_cmdb/model.rb

@@ -128,6 +128,36 @@ module LiudeskCMDB
         superclass.fields.merge(@fields || {})
       end
 
+      def convert_cmdb_to_ruby(data)
+        fields.each do |key, attributes|
+          next unless data[key]
+
+          case attributes[:convert].to_s
+          when Time.to_s
+            data[key] = Time.parse(data[key]).round
+          when Symbol.to_s
+            data[key] = data[key].to_sym
+          end
+        end
+
+        data
+      end
+
+      def convert_ruby_to_cmdb(data)
+        fields.each do |key, attributes|
+          next unless data.key? key
+
+          case attributes[:convert].to_s
+          when Time.to_s
+            data[key] = data[key].utc.round.strftime("%FT%T.%LZ") if data[key].is_a? Time
+          when Symbol.to_s
+            data[key] = data[key].to_s if data[key].is_a? Symbol
+          end
+        end
+
+        data
+      end
+
       protected
 
       def read_fields(*fields)
@@ -266,16 +296,7 @@ module LiudeskCMDB
       data = data.dup
 
       write_fields = self.class.fields.select { |_, field| field[:access].to_s.end_with?("write") }.map { |k, _| k }
-      self.class.fields.each do |key, attributes|
-        next unless data.key? key
-
-        case attributes[:convert].to_s
-        when Time.to_s
-          data[key] = data[key].utc.round.strftime("%FT%T.%LZ") if data[key].is_a? Time
-        when Symbol.to_s
-          data[key] = data[key].to_s if data[key].is_a? Symbol
-        end
-      end
+      self.class.convert_ruby_to_cmdb(data)
 
       data.select { |k, _| write_fields.include?(k) }.transform_keys { |k| self.class.fields.dig(k, :name) }
     end
@@ -291,16 +312,7 @@ module LiudeskCMDB
       @data = {} unless merge
       @data.merge!(converted)
 
-      self.class.fields.each do |key, attributes|
-        next unless @data[key]
-
-        case attributes[:convert].to_s
-        when Time.to_s
-          @data[key] = Time.parse(@data[key]).round
-        when Symbol.to_s
-          @data[key] = @data[key].to_sym
-        end
-      end
+      self.class.convert_cmdb_to_ruby(@data)
 
       @retrieved = Time.now
       self