Start updates to BoardState for LiveView (#26)

* Start updates to BoardState for LiveView

Begin work on utility functions for setting the status of a
BoardWord as being revealed when appropriate

* Remove scaffolded test

CI didn't like the scaffolded test for some reason

* Credo

Dammit Credo, nice catch

lib/letter_lines_elixir.ex

@@ -5,7 +5,7 @@ defmodule LetterLinesElixir do
   alias LetterLinesElixir.BoardState
   alias LetterLinesElixir.BoardWord
 
-  def generate_game() do
+  def generate_game do
     words = [
       BoardWord.new(5, 0, :v, "bunch"),
       BoardWord.new(0, 1, :v, "chub"),

lib/letter_lines_elixir/board_state.ex

@@ -54,7 +54,7 @@ defmodule LetterLinesElixir.BoardState do
   def print_board(%BoardState{width: width, height: height} = board_state) do
     for y <- 0..(height - 1) do
       0..(width - 1)
-      |> Enum.map(&get_display_letter_at(board_state, &1, y))
+      |> Enum.map(&get_display_ascii_letter_at(board_state, &1, y))
       |> Enum.join("")
       |> IO.puts()
     end
@@ -74,6 +74,23 @@ defmodule LetterLinesElixir.BoardState do
     end
   end
 
+  def get_display_letter_at(%BoardState{} = board_state, x, y) do
+    letter = BoardState.get_letter_at(board_state, x, y)
+
+    cond do
+      letter == :none -> :none
+      !letter_revealed?(board_state, x, y) -> :hidden
+      true -> letter
+    end
+  end
+
+  def reveal_word(%BoardState{words: words} = board_state, word) do
+    case put_in(words, [Access.filter(&match?(%{word: ^word}, &1)), :revealed?], true) do
+      ^words -> {:error, :nothing_revealed}
+      new_words -> %BoardState{board_state | words: new_words}
+    end
+  end
+
   defp letter_revealed?(%BoardState{words: words}, x, y) do
     words
     |> Enum.reject(&(BoardWord.get_letter_at(&1, x, y) == :none))
@@ -93,7 +110,7 @@ defmodule LetterLinesElixir.BoardState do
     end
   end
 
-  defp get_display_letter_at(%BoardState{} = board_state, x, y) do
+  defp get_display_ascii_letter_at(%BoardState{} = board_state, x, y) do
     letter = BoardState.get_letter_at(board_state, x, y)
 
     cond do

test/letter_lines_elixir/board_state_test.exs

@@ -37,6 +37,10 @@ defmodule LetterLinesElixir.BoardStateTest do
       assert %BoardState{words: ^words} = BoardState.new(@board_words)
     end
 
+    @tag :skip
+    test "rejects duplicate board words" do
+    end
+
     test "will raise when multiple letters are found at the same location" do
       assert_raise RuntimeError, "Multiple letters found at 5, 0: [\"b\", \"c\"]", fn ->
         BoardState.new(@colliding_board_words)
@@ -150,4 +154,12 @@ defmodule LetterLinesElixir.BoardStateTest do
 
     assert ["b", "r", "u", "n", "c", "h"] = BoardState.get_usable_letter_list(board_state)
   end
+
+  describe "reveal_word/2" do
+    test "given a BoardState and one of its words, the word is set to revealed" do
+    end
+
+    test "given a BoardState and a word it does not contain an error is returned" do
+    end
+  end
 end

test/letter_lines_elixir_test.exs

@@ -1,8 +1,4 @@
 defmodule LetterLinesElixirTest do
   use ExUnit.Case
   doctest LetterLinesElixir
-
-  test "greets the world" do
-    assert LetterLinesElixir.hello() == :world
-  end
 end