Class: Assembly::ContentMetadata::NokogiriBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/assembly-objectfile/content_metadata/nokogiri_builder.rb

Overview

Builds a nokogiri representation of the content metadata

Class Method Summary collapse

Class Method Details

.build(filesets:, druid:, common_path:, config:) ⇒ Object

Parameters:

  • filesets (Array<Fileset>)
  • druid (String)
  • common_path (String)
  • config (Config) 


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# File 'lib/assembly-objectfile/content_metadata/nokogiri_builder.rb', line 11

def self.build(filesets:, druid:, common_path:, config:)
  # a counter to use when creating auto-labels for resources, with incremenets for each type
  resource_type_counters = Hash.new(0)
  pid = druid.gsub('druid:', '') # remove druid prefix when creating IDs

  Nokogiri::XML::Builder.new do |xml|
    xml.contentMetadata(objectId: druid.to_s, type: config.type) do
      xml.bookData(readingOrder: config.reading_order) if config.type == 'book'

      filesets.each_with_index do |fileset, index| # iterate over all the resources
        # start a new resource element
        sequence = index + 1

        resource_type_counters[fileset.resource_type_description] += 1 # each resource type description gets its own incrementing counter

        xml.resource(id: "#{pid}_#{sequence}", sequence: sequence, type: fileset.resource_type_description) do
          # create a generic resource label if needed
          default_label = config.auto_labels ? "#{fileset.resource_type_description.capitalize} #{resource_type_counters[fileset.resource_type_description]}" : ''

          # but if one of the files has a label, use it instead
          resource_label = fileset.label_from_file(default: default_label)

          xml.label(resource_label) unless resource_label.empty?
          fileset.files.each do |obj| # iterate over all the files in a resource
            xml_file_params = { id: obj.file_id(common_path: common_path, flatten_folder_structure: config.flatten_folder_structure) }
            xml_file_params.merge!(obj.file_attributes(config.file_attributes)) if config.add_file_attributes
            xml_file_params.merge!(mimetype: obj.mimetype, size: obj.filesize) if config.add_exif

            xml.file(xml_file_params) do
              if config.add_exif # add exif info if the user requested it
                xml.checksum(obj.sha1, type: 'sha1')
                xml.checksum(obj.md5, type: 'md5')
                xml.imageData(obj.image_data) if obj.image? # add image data for an image
              elsif obj.provider_md5 || obj.provider_sha1 # if we did not add exif info, see if there are user supplied checksums to add
                xml.checksum(obj.provider_sha1, type: 'sha1') if obj.provider_sha1
                xml.checksum(obj.provider_md5, type: 'md5') if obj.provider_md5
              end
            end
          end
        end
      end
    end
  end
end