Send moves list back to client

lib/chess/board.ex

@@ -38,8 +38,8 @@ defmodule Chess.Board do
     {piece_captured, board} = Map.pop(board, "#{to_file},#{to_rank}")
 
     %{
-      from: %{file: from_file, rank: from_rank},
-      to: %{file: to_file, rank: to_rank},
+      from: %{"file" => from_file, "rank" => from_rank},
+      to: %{"file" => to_file, "rank" => to_rank},
       board: Map.put(board, "#{to_file},#{to_rank}", piece),
       piece: piece,
       piece_captured: piece_captured,

lib/chess/store/move.ex

@@ -29,8 +29,8 @@ defmodule Chess.Store.Move do
 
   def translate(move) do
     [
-      <<97 + move.from.file, 49 + move.from.rank>>,
-      <<97 + move.to.file, 49 + move.to.rank>>
+      <<97 + move.from["file"], 49 + move.from["rank"]>>,
+      <<97 + move.to["file"], 49 + move.to["rank"]>>
     ]
     |> Enum.join("-")
   end

lib/chess_web/channels/game_channel.ex

@@ -19,13 +19,15 @@ defmodule ChessWeb.GameChannel do
     game =
       socket.assigns.current_user_id
       |> Game.for_user_id()
+      |> preload(:moves)
       |> Repo.get!(game_id)
 
     payload = %{
       player: player(socket, game),
       board: Board.transform(game.board),
       turn: game.turn,
-      state: game.state
+      state: game.state,
+      moves: Moves.transform(game.moves),
     }
 
     socket
@@ -34,10 +36,13 @@ defmodule ChessWeb.GameChannel do
     {:noreply, socket}
   end
 
-  def handle_in("game:move", move_params, socket) do
+  def handle_in("game:move", params, socket) do
+    move_params = convert_params(params)
+
     game =
       socket.assigns.current_user_id
       |> Game.for_user_id()
+      |> preload(:moves)
       |> Repo.get!(socket.assigns.game_id)
 
     params = Board.move_piece(game.board, move_params)
@@ -47,8 +52,8 @@ defmodule ChessWeb.GameChannel do
     |> Multi.insert(:move, Ecto.build_assoc(game, :moves, params))
     |> Repo.transaction
     |> case do
-      {:ok, %{game: game}} ->
-        send_update(game)
+      {:ok, _} ->
+        send_update(socket)
 
         {:noreply, socket}
       {:error, :game, changeset, _} ->
@@ -80,11 +85,25 @@ defmodule ChessWeb.GameChannel do
     {:reply, {:ok, reply}, socket}
   end
 
-  def send_update(game) do
+  def convert_params(%{"from" => from, "to" => to}) do
+    %{
+      "from" => Enum.map(from, fn(s) -> String.to_integer(s) end),
+      "to" => Enum.map(to, fn(s) -> String.to_integer(s) end),
+    }
+  end
+
+  def send_update(socket) do
+    game =
+      socket.assigns.current_user_id
+      |> Game.for_user_id()
+      |> preload(:moves)
+      |> Repo.get!(socket.assigns.game_id)
+
     payload = %{
       board: Board.transform(game.board),
       turn: game.turn,
-      state: game.state
+      state: game.state,
+      moves: Moves.transform(game.moves),
     }
     ChessWeb.Endpoint.broadcast("game:#{game.id}", "game:update", payload)
   end

test/chess/board_test.exs

@@ -46,7 +46,7 @@ defmodule Chess.BoardTest do
     }
 
     %{board: new_board} =
-      Board.move_piece(board, %{"from" => [3, 0], "to" => [5, 2]})
+      Board.move_piece(board, %{"from" => ["3", "0"], "to" => ["5", "2"]})
 
     assert new_board == %{
       "5,2" => %{"type" => "queen", "colour" => "white"},

test/chess/moves_test.exs

@@ -10,16 +10,16 @@ defmodule Chess.MovesTest do
     test "tranforms a list of moves" do
       moves = [
         %Move{
-          from: %{file: 4, rank: 1},
-          to: %{file: 4, rank: 3},
+          from: %{"file" => 4, "rank" => 1},
+          to: %{"file" => 4, "rank" => 3},
         },
         %Move{
-          from: %{file: 4, rank: 6},
-          to: %{file: 4, rank: 4},
+          from: %{"file" => 4, "rank" => 6},
+          to: %{"file" => 4, "rank" => 4},
         },
         %Move{
-          from: %{file: 1, rank: 0},
-          to: %{file: 2, rank: 2},
+          from: %{"file" => 1, "rank" => 0},
+          to: %{"file" => 2, "rank" => 2},
         },
       ]
 

test/chess/store/move_test.exs

@@ -22,8 +22,8 @@ defmodule Chess.MoveTest do
 
       changeset = Move.changeset(%Move{}, %{
         game_id: game.id,
-        from: %{file: 4, rank: 1},
-        to: %{file: 4, rank: 3},
+        from: %{"file" => 4, "rank" => 1},
+        to: %{"file" => 4, "rank" => 3},
         piece: %{"type" => "pawn", "colour" => "white"},
       })
 
@@ -33,8 +33,8 @@ defmodule Chess.MoveTest do
 
     test "move is invalid without a game" do
       changeset = Move.changeset(%Move{}, %{
-        from: %{file: 4, rank: 1},
-        to: %{file: 4, rank: 3},
+        from: %{"file" => 4, "rank" => 1},
+        to: %{"file" => 4, "rank" => 3},
         piece: %{"type" => "pawn", "colour" => "white"},
       })
 
@@ -71,8 +71,8 @@ defmodule Chess.MoveTest do
 
       changeset = Move.changeset(%Move{}, %{
         game_id: game.id,
-        from: %{file: 4, rank: 1},
-        to: %{file: 4, rank: 3},
+        from: %{"file" => 4, "rank" => 1},
+        to: %{"file" => 4, "rank" => 3},
       })
 
       refute changeset.valid?
@@ -81,8 +81,8 @@ defmodule Chess.MoveTest do
 
     test "translates a move" do
       move = %Move{
-        from: %{file: 4, rank: 1},
-        to: %{file: 4, rank: 3},
+        from: %{"file" => 4, "rank" => 1},
+        to: %{"file" => 4, "rank" => 3},
       }
 
       assert Move.translate(move) == "e2-e4"