class ApplicationController < ActionController::Base
  protect_from_forgery

  def authenticate_user!(*args)
    current_user.present? || super(*args)
  end

  def current_user
    super || AnonymousUser.find_or_initialize_by_token(anonymous_user_token).tap do |user|
      user.save(validate: false) if user.new_record?
    end
  end

  private
  def anonymous_user_token
    session[:user_token] ||= SecureRandom.hex(8)
  end
end