module_article.ex

defmodule Game do
  require Board

  defstruct board: %Board{}
  
  def is_complete?(%Game{ board: board } = game) do
    Board.has_winner?(board) or Board.is_draw?(board) 
  end
end

defmodule Board do
  # Positions with the x coord and y coord separated by an underscore
  defstruct "0_0": "", "0_1": "", ...

  def has_winner?(%Board{} = board) do
    # All that logic to check for TicTacToe win states
  end

  def is_draw?(%Board{} = board) do
    # All that logic to check for all positions taken with no winner
  end
end