Module: RepresentativeFileVersion::ClassMethods

Defined in:
backend/app/model/mixins/representative_file_version.rb

Instance Method Summary collapse

Instance Method Details

#sequel_to_jsonmodel(objs, opts = {}) ⇒ Object 



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# File 'backend/app/model/mixins/representative_file_version.rb', line 40

def sequel_to_jsonmodel(objs, opts = {})
  jsons = super

  jsons.each do |json|
    case self.name
    when "Resource", "Accession", "ArchivalObject"
      if representative_instance = json.instances.select {|i| i["is_representative"] == true && i["instance_type"] == "digital_object" }.first
        id = JSONModel(:digital_object).id_for(representative_instance["digital_object"]["ref"])
        digital_object = DigitalObject.to_jsonmodel(id, opts)
        if digital_object["representative_file_version"]
          json["representative_file_version"] = digital_object["representative_file_version"]
                                                  .merge("derived_from" => digital_object.uri)
                                                  .reject { |k, _| k == "link_uri" }
        else
          digital_object_component_set = DigitalObjectComponent
                                           .left_join(:file_version, digital_object_component_id: :digital_object_component__id)
                                           .filter(root_record_id: digital_object.id)
                                           .select(Sequel.as(:digital_object_component__id, :digital_object_component_id),
                                                   Sequel.as(:digital_object_component__parent_id, :digital_object_component_parent_id),
                                                   Sequel.as(:digital_object_component__position, :digital_object_component_position),
                                                   Sequel.as(:file_version__id, :file_version_id),
                                                   Sequel.as(:file_version__publish, :file_version_publish),
                                                   Sequel.as(:file_version__use_statement_id, :file_version_use_statement_id),
                                                   Sequel.as(:file_version__is_representative, :file_version_is_representative))
                                           .order(:digital_object_component_position)

          if (digital_object_component_id = find_representative_in_digital_object_tree(digital_object_component_set))
            digital_object_component = DigitalObjectComponent.to_jsonmodel(digital_object_component_id, opts)
            if digital_object_component['representative_file_version']
              json['representative_file_version'] = digital_object_component['representative_file_version'].merge("derived_from" => digital_object_component.uri)
            end
          end
        end
      end
    when "DigitalObject", "DigitalObjectComponent"
      fvs = json[:file_versions]
      fv_pairs = []
      last_pair = nil
      fvs.each do |fv|
        # all done if:
        break if fv_pairs[0] && fv_pairs[0].size == 2
        # ANW-1721 - if the fv in last_pair ends up being selected, this will be its link target
        if (last_pair && last_pair.size == 1)
          last_pair << fv
        end
        # ANW-1209 REQ-3
        if fv_pairs[0].nil? && fv["publish"] && fv["is_representative"]
          last_pair = fv_pairs[0] = [fv]
        # ANW-1209 REQ-3.1
        elsif fv_pairs[1].nil? && fv["publish"] && fv["use_statement"] == 'image-thumbnail'
          last_pair = fv_pairs[1] = [fv]
        # The older logic for selecting an image to show via `process_file_versions`
        # in public/app/controllers/concerns/result_info.rb
        elsif fv_pairs[2].nil? && fv["publish"] \
          && fv["file_uri"].start_with?('http') && fv["xlink_show_attribute"] == 'embed'

          last_pair = fv_pairs[2] = [fv]
        end
      end
      # now we select the best candidate pair based on order
      if (fvp = fv_pairs.compact.first)
        json["representative_file_version"] = fvp[0]
        if fvp[1] && fvp[1]["publish"]
          json["representative_file_version"]["link_uri"] = fvp[1]["file_uri"]
        end
      end

    end

    # if we still don't have a representative and are dealing with a Resource
    # that has a tree under it, we will now look in the tree
    if json["representative_file_version"].nil? && self.name == "Resource"

      archival_object_set = ArchivalObject
                              .left_join(:instance, :archival_object_id => :archival_object__id)
                              .left_join(:instance_do_link_rlshp, :instance_id => :instance__id)
                              .left_join(:digital_object, :id => :instance_do_link_rlshp__digital_object_id)
                              .filter(archival_object__root_record_id: json.id)
                              .filter(archival_object__publish: true)
                              .select(Sequel.as(:archival_object__id, :archival_object_id),
                                      Sequel.as(:archival_object__position, :archival_object_position),
                                      Sequel.as(:archival_object__parent_id, :archival_object_parent_id),
                                      Sequel.as(:digital_object__id, :digital_object_id),
                                      Sequel.as(:instance__is_representative, :digital_object_is_representative))
                              # .order(:archival_object_position)

      if (digital_object_id = find_representative_in_resource_tree(archival_object_set))
        digital_object = DigitalObject.to_jsonmodel(digital_object_id, opts)
        if digital_object["representative_file_version"]
          json["representative_file_version"] = digital_object['representative_file_version'].merge("derived_from" => digital_object.uri)
        else
          digital_object_component_set = DigitalObjectComponent
                                           .left_join(:file_version, digital_object_component_id: :digital_object_component__id)
                                           .filter(root_record_id: digital_object.id)
                                           .select(Sequel.as(:digital_object_component__id, :digital_object_component_id),
                                                   Sequel.as(:digital_object_component__parent_id, :digital_object_component_parent_id),
                                                   Sequel.as(:digital_object_component__position, :digital_object_component_position),
                                                   Sequel.as(:file_version__id, :file_version_id),
                                                   Sequel.as(:file_version__publish, :file_version_publish),
                                                   Sequel.as(:file_version__use_statement_id, :file_version_use_statement_id),
                                                   Sequel.as(:file_version__is_representative, :file_version_is_representative))
                                           .order(:digital_object_component_position)

          if (digital_object_component_id = find_representative_in_digital_object_tree(digital_object_component_set))
            digital_object_component = DigitalObjectComponent.to_jsonmodel(digital_object_component_id, opts)
            if digital_object_component['representative_file_version']
              json['representative_file_version'] = digital_object_component['representative_file_version'].merge("derived_from" => digital_object_component.uri)
            end
          end
        end
      end

    end
  end
  jsons
end