module Mongoid::Copyable

# File lib/mongoid/copyable.rb, line 20
def clone
  # @note This next line is here to address #2704, even though having an
  # _id and id field in the document would cause problems with Mongoid
  # elsewhere.
  attrs = clone_document.except(*self.class.id_fields)
  dynamic_attrs = {}
  _attribute_names = self.attribute_names
  attrs.reject! do |attr_name, value|
    unless _attribute_names.include?(attr_name)
      dynamic_attrs[attr_name] = value
      true
    end
  end
  self.class.new(attrs).tap do |object|
    dynamic_attrs.each do |attr_name, value|
      if object.respond_to?("#{attr_name}=")
        object.send("#{attr_name}=", value)
      else
        object.attributes[attr_name] = value
      end
    end
  end
end

# File lib/mongoid/copyable.rb, line 55
def clone_document
  attrs = as_attributes.__deep_copy__
  process_localized_attributes(self, attrs)
  attrs
end

# File lib/mongoid/copyable.rb, line 72
def process_localized_attributes(klass, attrs)
  klass.localized_fields.keys.each do |name|
    if value = attrs.delete(name)
      attrs["#{name}_translations"] = value
    end
  end
  klass.embedded_relations.each do |_, association|
    next unless attrs.present? && attrs[association.key].present?

    if association.is_a?(Association::Embedded::EmbedsMany)
      attrs[association.key].each do |attr|
        embedded_klass = if type = attr[self.class.discriminator_key]
          association.relation_class.get_discriminator_mapping(type) || association.relation_class
        else
          association.relation_class
        end
        process_localized_attributes(embedded_klass, attr)
      end
    else
      process_localized_attributes(association.klass, attrs[association.key])
    end
  end
end