phoenix_live_state

defmodule PhoenixLiveState.StateServer.Settings do
  @moduledoc """
  Describes the settings of a StateServer.
  """
  @moduledoc since: "0.1.0"

  alias PhoenixLiveState.StateServer.Policy
  alias PhoenixLiveState.StateSpec

  defstruct [:ttl, :acl]

  @default_ttl 60_000

  @type t :: %__MODULE__{
          ttl: non_neg_integer(),
          acl: Policy.acl()
        }

  @doc """
  Creates a new Settings struct based on the given values.
  """
  @spec new(StateSpec.t()) :: t()
  def new(%StateSpec{ttl: ttl, acl: acl}) do
    %__MODULE__{
      ttl: resolve_ttl(ttl || :default),
      acl: resolve_acl(acl)
    }
  end

  defp resolve_ttl(:default), do: @default_ttl
  defp resolve_ttl(ttl), do: ttl

  defp resolve_acl(nil), do: Policy.default_acl()
  defp resolve_acl(:default), do: Policy.default_acl()
  defp resolve_acl(acl), do: Policy.build_acl!(acl)
end