Class: Wings::AttributeTransformer

Inherits:
Object
  • Object
show all
Defined in:
lib/wings/attribute_transformer.rb

Overview

Transform AF attributes to Valkyrie::Resource attributes representation.

Class Method Summary collapse

Class Method Details

.for(obj) ⇒ Object 



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# File 'lib/wings/attribute_transformer.rb', line 9

def self.for(obj)
  case obj
  when Hydra::PCDM::File
    FileAttributeTransformer.new
  else
    self
  end
end

.run(obj) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength, Metrics/PerceivedComplexity



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# File 'lib/wings/attribute_transformer.rb', line 18

def self.run(obj) # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength, Metrics/PerceivedComplexity
  attrs = obj.reflections.each_with_object({}) do |(key, reflection), mem| # rubocop:disable Metrics/BlockLength
    case reflection
    when ActiveFedora::Reflection::BelongsToReflection, # uses foreign_key SingularRDFPropertyReflection
         ActiveFedora::Reflection::BasicContainsReflection, # ???
         ActiveFedora::Reflection::FilterReflection, # rely on :extending_from
         ActiveFedora::Reflection::HasAndBelongsToManyReflection, # uses foreign_key RDFPropertyReflection
         ActiveFedora::Reflection::HasManyReflection, # captured by inverse relation
         ActiveFedora::Reflection::HasSubresourceReflection, # ???
      :noop
    when ActiveFedora::Reflection::OrdersReflection
      mem[:"#{reflection.options[:unordered_reflection].name.to_s.singularize}_ids"] ||= []
      mem[:"#{reflection.options[:unordered_reflection].name.to_s.singularize}_ids"] +=
        obj.association(reflection.name).target_ids_reader
    when ActiveFedora::Reflection::DirectlyContainsOneReflection
      mem[:"#{key.to_s.singularize}_id"] =
        obj.public_send(reflection.name)&.id
    when ActiveFedora::Reflection::IndirectlyContainsReflection
      mem[:"#{key.to_s.singularize}_ids"] ||= []
      mem[:"#{key.to_s.singularize}_ids"] +=
        obj.association(key).ids_reader
    when ActiveFedora::Reflection::DirectlyContainsReflection
      mem[:"#{key.to_s.singularize}_ids"] ||= []
      mem[:"#{key.to_s.singularize}_ids"] +=
        Array(obj.public_send(reflection.name)).map(&:id)
    when ActiveFedora::Reflection::RDFPropertyReflection
      mem[reflection.name.to_sym] =
        obj.public_send(reflection.name.to_sym)
    else
      raise NotImplementedError, "Expected a known ActiveFedora::Reflection, but got #{reflection}"
    end
  end

  obj.class.delegated_attributes.keys.each_with_object(attrs) do |attr_name, mem|
    next unless obj.respond_to?(attr_name) && !mem.key?(attr_name.to_sym)
    mem[attr_name.to_sym] = TransformerValueMapper.for(obj.public_send(attr_name)).result
  end
end