pockets

defmodule Pockets.EtsInfo do
  @moduledoc """
  A struct defining information about an Erlang `:ets` in-memory table,
  adapted from [:ets.info/1](https://erlang.org/doc/man/ets.html#info-1)

  - `table_id` is the table identifier used in the `Pockets` calls.
  - `table_ref` is the table identifier used with `:ets` commands
  """

  # iex> :ets.info(:my_cache)
  # [
  #  id: #Reference<0.4127012117.1335492609.119067>,
  #  decentralized_counters: false,
  #  read_concurrency: true,
  #  write_concurrency: true,
  #  compressed: false,
  #  memory: 1335,
  #  owner: #PID<0.217.0>,
  #  heir: :none,
  #  name: :my_cache,
  #  size: 0,
  #  node: :nonode@nohost,
  #  named_table: true,
  #  type: :set,
  #  keypos: 1,
  #  protection: :public
  # ]
  #  @enforce_keys [:table_id, :type, :table_ref, :library]
  defstruct [
    # custom
    #    :table_id,
    # equal to table_name atom if :named_table, otherwise equal to id reference
    #    :table_ref,
    # Shared
    :name,
    :type,
    :size,
    :keypos,
    # Specific to ETS
    :id,
    :decentralized_counters,
    :read_concurrency,
    :write_concurrency,
    :compressed,
    :memory,
    :owner,
    :heir,
    :node,
    :named_table,
    :protection
  ]

  def new(info), do: struct(__MODULE__, info)
  #    struct(
  #      __MODULE__,
  #      info
  #      |> Enum.into(%{})
  #      |> put_table_ref()
  #      |> Map.put(:library, :ets)
  #    )
  #  end
  #
  #  defp put_table_ref(%{named_table: true} = map) do
  #    Map.put(map, :table_ref, map[:table_id])
  #  end
  #
  #  defp put_table_ref(%{named_table: false} = map) do
  #    Map.put(map, :table_ref, map[:id])
  #  end
end