module ActiveFedora::Core

def self.translate_id_to_uri=(translator)
  @@translate_id_to_uri = translator || FedoraIdTranslator
end

def self.translate_uri_to_id=(translator)
  @@translate_uri_to_id = translator || FedoraUriTranslator
end

def ==(comparison_object)
     comparison_object.equal?(self) ||
       (comparison_object.instance_of?(self.class) &&
         comparison_object.id == id &&
         !comparison_object.new_record?)
end

def assert_content_model
  self.has_model = self.class.to_s
end

def build_ldp_resource(id=nil)
  ActiveFedora.fedora.ldp_resource_service.build(self.class, id)
end

def check_persistence
  if destroyed?
    raise ActiveFedora::ObjectNotFoundError, "Can't reload an object that has been destroyed"
  else
    raise ActiveFedora::ObjectNotFoundError, "Can't reload an object that hasn't been saved"
  end
end

def freeze
  @resource.freeze
  #@attributes = @attributes.clone.freeze
  attached_files.freeze
  self
end

def frozen?
  attached_files.frozen?
end

def init_internals
  @resource          = nil
  @readonly          = false
  @association_cache = {}
end

def init_with_resource(rdf_resource)
  init_internals
  @ldp_source = rdf_resource
  load_attached_files
  run_callbacks :find
  run_callbacks :initialize
  self
end

def initialize(attributes_or_id = nil, &block)
  init_internals
  attributes = initialize_attributes(attributes_or_id)
  @ldp_source = build_ldp_resource(attributes.delete(:id))
  raise IllegalOperation, "Attempting to recreate existing ldp_source: `#{ldp_source.subject}'" unless ldp_source.new?
  assert_content_model
  load_attached_files
  self.attributes = attributes
  yield self if block_given?
  run_callbacks :initialize
end

def initialize_attributes attributes_or_id
  case attributes_or_id
    when String
      attributes = {id: attributes_or_id}.with_indifferent_access
    when Hash
      attributes = attributes_or_id.with_indifferent_access
      # TODO: Remove when we decide using 'pid' is no longer supported.
      if !attributes.key?(:id) && attributes.key?(:pid)
        Deprecation.warn Core, 'Initializing with :pid is deprecated and will be removed in active-fedora 10.0. Use :id instead'
        attributes[:id] = attributes.delete(:pid)
      end
    when NilClass
      attributes = {}.with_indifferent_access
    else
      raise ArgumentError, "#{attributes_or_id.class} is not acceptable"
  end
  return attributes
end

def ldp_source
  @ldp_source
end

def readonly!
  @readonly = true
end

def readonly?
  @readonly
end

def reload
  check_persistence unless persisted?
  clear_association_cache
  clear_attached_files
  refresh
  load_attached_files
  self
end