#
# A Component is a part of an Item; the principal content-bearing repository resource.
#
# Examples: Page of a book, track of a recording, etc.
#
class Component < Ddr::Models::Base

  include Ddr::Models::HasContent
  include Ddr::Models::HasMultiresImage
  include Ddr::Models::HasStructMetadata

  belongs_to :parent,
             predicate: ActiveFedora::RDF::Fcrepo::RelsExt.isPartOf,
             class_name: "Item"

  belongs_to :target,
             predicate: ::RDF::URI("http://www.loc.gov/mix/v20/externalTarget#hasExternalTarget"),
             class_name: "Target"

  after_save :index_parent, if: :has_extracted_text?, unless: "parent.nil?"

  def collection
    self.parent.parent rescue nil
  end

  def collection_id
    collection.id rescue nil
  end

  def publishable?
    parent.present? && parent.published?
  end

  def index_parent
    Resque.enqueue(Ddr::Jobs::UpdateIndex, parent_id)
  end

end