Returns a specification to start this module under a supervisor.

See Supervisor.

@spec init(
  {Islands.Game.name(), Islands.Player.name(), Islands.Player.gender(), pid()}
) ::
  {:ok, Islands.Game.t(), timeout()}

Callback implementation for GenServer.init/1.

@spec save(Islands.Game.t()) :: Islands.Game.t()

Takes a backup of game and returns it.

@spec start_link(
  {Islands.Game.name(), Islands.Player.name(), Islands.Player.gender(), pid()}
) ::
  GenServer.on_start()

Spawns a game server process to be registered via a game name.

@spec via(Islands.Game.name()) :: {:global, tuple()}

Allows to register or look up a game server process via game_name.