lib/ddr/models/has_struct_metadata.rb in ddr-models-2.11.0 vs lib/ddr/models/has_struct_metadata.rb in ddr-models-3.0.0.alpha.1

@@ -2,21 +2,59 @@
   module Models
     module HasStructMetadata
       extend ActiveSupport::Concern
 
       included do
-        has_file_datastream name: Ddr::Datastreams::STRUCT_METADATA,
-                            type: Ddr::Datastreams::StructuralMetadataDatastream
+        contains Ddr::Datastreams::STRUCT_METADATA, class_name: 'Ddr::Datastreams::StructuralMetadataDatastream'
       end
 
       def structure
-        if datastreams[Ddr::Datastreams::STRUCT_METADATA].has_content?
-          Ddr::Models::Structure.new(Nokogiri::XML(datastreams[Ddr::Datastreams::STRUCT_METADATA].content))
+        unless @structure
+          if datastreams[Ddr::Datastreams::STRUCT_METADATA].content
+            @structure = Ddr::Models::Structure.new(Nokogiri::XML(datastreams[Ddr::Datastreams::STRUCT_METADATA].content))
+          end
         end
+        @structure
       end
 
-      def multires_image_file_paths
-        ::SolrDocument.find(pid).multires_image_file_paths
+      def build_default_structure
+        structure = Ddr::Models::Structure.new(Ddr::Models::Structure.template)
+        children = find_children
+        children.each do |child|
+          add_to_struct_map(structure, child)
+        end
+        structure
+      end
+
+      def multires_image_file_paths(type='default')
+        ::SolrDocument.find(pid).multires_image_file_paths(type)
+      end
+
+      private
+
+      def find_children
+        query = association_query(:children)
+        sort = "#{Ddr::Index::Fields::LOCAL_ID} ASC, #{Ddr::Index::Fields::OBJECT_CREATE_DATE} ASC"
+        ActiveFedora::SolrService.query(query, sort: sort, rows: 999999)
+      end
+
+      def add_to_struct_map(stru, child)
+        div = create_div(stru)
+        create_fptr(stru, div, child['id'])
+      end
+
+      def create_div(stru)
+        div_count = stru.structMap_node('default').xpath('xmlns:div').size
+        div = Nokogiri::XML::Node.new('div', stru.as_xml_document)
+        div['ORDER'] = div_count + 1
+        stru.structMap_node('default').add_child(div)
+        div
+      end
+
+      def create_fptr(stru, div, pid)
+        fptr = Nokogiri::XML::Node.new('fptr', stru.as_xml_document)
+        fptr['CONTENTIDS'] = "info:fedora/#{pid}"
+        div.add_child(fptr)
       end
 
     end
   end
 end