module Split
  class User
    extend Forwardable
    def_delegators :@user, :keys, :[], :[]=, :delete
    attr_reader :user

    def initialize(context)
      @user = Split::Persistence.adapter.new(context)
    end

    def cleanup_old_experiments
      user.keys.each do |key|
        experiment = ExperimentCatalog.find key_without_version(key)
        if experiment.nil? || experiment.has_winner? || experiment.start_time.nil?
          user.delete key
        end
      end
    end

    def key_without_version(key)
      key.split(/\:\d(?!\:)/)[0]
    end
  end
end