.ex

#...
  @spec init(Keyword.t) :: [tuple]
  def init(opts) do
    login =
      case opts[:login] do
        true  -> true
        fun when is_function(fun) ->
          fun
        other ->
          case opts[:protected] do
            nil -> other
            true -> true
            other -> other
          end
      end

    rememberable? =
      if Config.has_option(:rememberable) do
        Config.user_schema.rememberable?
      else
        false
      end

    %{
      login: login,
      error: Keyword.get(opts, :error, "HTTP Authentication Required"),
      db_model: Keyword.get(opts, :db_model),
      id_key: Keyword.get(opts, :id, :id),
      store: Keyword.get(opts, :store, Coherence.CredentialStore.Session),
      assigns_key: Keyword.get(opts, :assigns_key, :current_user),
      login_key: Keyword.get(opts, :login_cookie, Config.login_cookie),
      rememberable: Keyword.get(opts, :rememberable, rememberable?),
      cookie_expire: Keyword.get(opts, :login_cookie_expire_hours, Config.rememberable_cookie_expire_hours) * 60 * 60,
      rememberable_callback: Keyword.get(opts, :rememberable_callback)
    }
  end

  @doc false
  @spec call(conn, Keyword.t) :: conn
  def call(conn, opts) do
    if get_authenticated_user(conn) do
      conn
    else
      conn
      |> get_session_data
      |> verify_auth_key(opts, opts[:store])
      |> verify_rememberable(opts)
      |> assert_login(opts[:login], opts)
    end
  end
#...