Checkpoint

1 files changed, 113 insertions, 0 deletions

diff --git a/lib/chessh/ssh/client/board/board.ex b/lib/chessh/ssh/client/board/board.ex
new file mode 100644
index 0000000..600917f
--- /dev/null
+++ b/lib/chessh/ssh/client/board/board.ex
@@ -0,0 +1,113 @@
+defmodule Chessh.SSH.Client.Board do
+  alias IO.ANSI
+  require Logger
+
+  @chess_board_height 8
+  @chess_board_width 8
+  @tile_width 7
+  @tile_height 4
+
+  @dark_piece_color ANSI.magenta()
+  @light_piece_color ANSI.red()
+  @from_select_background ANSI.green_background()
+  @to_select_background ANSI.blue_background()
+
+  defmodule State do
+    defstruct cursor: %{x: 0, y: 0},
+              highlighted: %{},
+              move_from: nil,
+              game_id: nil,
+              client_pid: nil
+  end
+
+  use Chessh.SSH.Client.Screen
+
+  def init([%State{game_id: game_id} = state | _]) do
+    :syn.add_node_to_scopes([:games])
+    :ok = :syn.join(:games, {:game, game_id}, self())
+
+    {:ok, state}
+  end
+
+  def handle_info({:attempted_move, move}, %State{client_pid: client_pid} = state) do
+    send(client_pid, {:send_to_ssh, ["hello, world!"]})
+    {:noreply, state}
+  end
+
+  def input(
+        width,
+        height,
+        action,
+        %State{
+          move_from: move_from,
+          game_id: game_id,
+          cursor: %{x: cursor_x, y: cursor_y} = cursor,
+          client_pid: client_pid
+        } = state
+      ) do
+    new_cursor =
+      case action do
+        :left -> %{y: cursor_y, x: cursor_x - 1}
+        :right -> %{y: cursor_y, x: cursor_x + 1}
+        :down -> %{y: cursor_y + 1, x: cursor_x}
+        :up -> %{y: cursor_y - 1, x: cursor_x}
+        _ -> cursor
+      end
+
+    {new_move_from, move_to} =
+      if action == :return do
+        coords = {new_cursor.y, new_cursor.x}
+
+        case move_from do
+          nil -> {coords, nil}
+          _ -> {nil, coords}
+        end
+      else
+        {move_from, nil}
+      end
+
+    if move_from && move_to do
+      attempted_move = "#{to_chess_coord(move_from)}#{to_chess_coord(move_to)}"
+      :syn.publish(:games, {:game, game_id}, {:new_move, attempted_move})
+    end
+
+    new_state = %State{
+      state
+      | cursor: new_cursor,
+        move_from: new_move_from,
+        highlighted: %{
+          new_move_from => @from_select_background,
+          {new_cursor.y, new_cursor.x} => @to_select_background
+        }
+    }
+
+    send(client_pid, {:send_to_ssh, render_state(width, height, new_state)})
+    new_state
+  end
+
+  def render(width, height, %State{client_pid: client_pid} = state) do
+    send(client_pid, {:send_to_ssh, render_state(width, height, state)})
+    state
+  end
+
+  defp render_state(width, height, %State{} = _state) do
+    [ANSI.clear(), "#{width}#{height}"]
+  end
+
+  defp to_chess_coord({y, x})
+       when x >= 0 and x < @chess_board_width and y >= 0 and y < @chess_board_height do
+    "#{List.to_string([?a + x])}#{y + 1}"
+  end
+
+  defp piece_type(char) do
+    case String.capitalize(char) do
+      "P" -> "pawn"
+      "N" -> "knight"
+      "R" -> "rook"
+      "B" -> "bishop"
+      "K" -> "king"
+      "Q" -> "queen"
+      _ -> nil
+    end
+  end
+end