class Proverb < ApplicationRecord

  belongs_to :author
  belongs_to :user

  before_validation :setup_ownership

  attr_writer :author_name, :user_email

  def author_name
    author.try(:name) || @author_name
  end

  def user_email
    user.try(:email) || @user_email
  end

  private

  def setup_ownership
    if author
      author.update_attributes(name: author_name)
    else
      self.author = Author.new(name: author_name)
      author.identify_uniquely
      author.save
    end

    if user
      user.update_attributes(email: user_email.downcase)
    else
      self.user = User.create(email: user_email.downcase)
    end
  end

  def attributes
    super.merge(author_name: author_name, user_email: user_email)
  end

end