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islands_board_cache

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Board Cache for the Game of Islands. Returns a random board.

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islands_board_cache lib islands board cache server.ex
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lib/islands/board/cache/server.ex 

defmodule Islands.Board.Cache.Server do

  @moduledoc """

  Process that generates a list of boards and caches it for expedient access.

  """



  use GenServer

  use PersistConfig



  alias __MODULE__

  alias Islands.Board.Cache.Generator

  alias Islands.Board



  @timeout :infinity



  @typedoc "Server state"

  @type state :: [Board.t()]



  @doc """

  Spawns a cache server process registered with the module name.

  """

  @spec start_link(term) :: GenServer.on_start()

  def start_link(_init_arg = :ok),

    do: GenServer.start_link(Server, :ok, name: Server)



  ## Callbacks



  @spec init(term) :: {:ok, state, timeout}

  def init(_init_arg = :ok), do: {:ok, Generator.gen_boards(), @timeout}



  @spec handle_call(atom, GenServer.from(), state) ::

          {:reply, Board.t(), state, timeout}

  def handle_call(:get_board, _from, boards) do

    {:reply, Enum.random(boards), boards, @timeout}

  end



  def handle_call(:board_count, _from, boards) do

    {:reply, length(boards), boards, @timeout}

  end



  @spec handle_info(term, state) :: {:noreply, state}

  def handle_info(_message, state), do: {:noreply, state}

end