renderer.ex

defmodule Renderer do
  def render_board(state) do
    state.tiles
      |> render_tiles
      |> Enum.join("\n")
  end

  defp render_tiles(tiles) do
    tiles
      |> Enum.map(fn(row) -> render_row(row) end)
  end

  defp render_row(row) do
    row
      |> Enum.map(fn(tile) -> render_tile(tile) end)
      |> Enum.join("")
  end

  defp render_tile(tile) do
    "."
  end
end