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|
defmodule Chessh.SSH.Client.Board do
alias Chessh.SSH.Client
alias IO.ANSI
require Logger
defmodule State do
defstruct cursor_x: 0,
cursor_y: 0
end
use Chessh.SSH.Client.Screen
@chess_board_height 8
@chess_board_width 8
def tileIsLight(row, col) do
rem(row, 2) == rem(col, 2)
end
def piece_type(char) do
case String.capitalize(char) do
"P" -> "pawn"
"N" -> "knight"
"R" -> "rook"
"B" -> "bishop"
"K" -> "king"
"Q" -> "queen"
_ -> nil
end
end
def make_board({tile_width, tile_height}) do
rows =
Enum.map(0..(@chess_board_height - 1), fn i ->
Enum.map(0..(@chess_board_width - 1), fn j ->
List.duplicate(if(tileIsLight(i, j), do: ' ', else: '▊'), tile_width)
end)
|> Enum.join("")
end)
Enum.flat_map(rows, fn row -> Enum.map(1..tile_height, fn _ -> row end) end)
end
def make_board(fen, {tile_width, tile_height} = tile_dims) do
rows =
String.split(fen, " ")
|> List.first()
|> String.split("/")
coordinate_to_piece =
Enum.zip(rows, 0..(length(rows) - 1))
|> Enum.map(fn {row, rowI} ->
{@chess_board_height, pieces_per_row} =
Enum.reduce(
String.split(row, ""),
{0, %{}},
fn char, {curr_column, data} ->
case Integer.parse(char) do
{skip, ""} ->
{curr_column + skip, data}
_ ->
case piece_type(char) do
nil ->
{curr_column, data}
type ->
{curr_column + 1,
Map.put(
data,
"#{rowI}, #{curr_column}",
@ascii_chars["pieces"][
if(char != String.capitalize(char), do: "dark", else: "light")
][type]
)}
end
end
end
)
pieces_per_row
end)
|> Enum.reduce(%{}, fn pieces_map_for_this_row, acc ->
Map.merge(acc, pieces_map_for_this_row)
end)
board = make_board(tile_dims)
Enum.zip_with([board, 0..(length(board) - 1)], fn [rowStr, row] ->
curr_y = div(row, tile_height)
Enum.zip_with([String.graphemes(rowStr), 0..(String.length(rowStr) - 1)], fn [char, col] ->
curr_x = div(col, tile_width)
key = "#{curr_y}, #{curr_x}"
if Map.has_key?(coordinate_to_piece, key) do
piece_row =
Map.fetch!(coordinate_to_piece, key)
|> Enum.at(row - curr_y * tile_height)
piece_row_len = String.length(piece_row)
centered_col = div(tile_width - piece_row_len, 2)
relative_to_tile_col = col - curr_x * tile_width
Logger.debug("#{piece_row_len}, #{centered_col}, #{relative_to_tile_col}")
piece_char =
if relative_to_tile_col >= centered_col &&
relative_to_tile_col <= tile_width - centered_col - 1,
do: String.at(piece_row, relative_to_tile_col - centered_col),
else: " "
if piece_char == " ",
do: char,
else: piece_char
else
char
end
end)
|> Enum.join("")
end)
end
def render(%Client.State{} = _state) do
board = make_board("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1", {7, 4})
[ANSI.home()] ++
Enum.map(
Enum.zip(1..length(board), board),
fn {i, line} ->
[ANSI.cursor(i, 0), line]
end
)
end
def handle_input(action, %Client.State{} = state) do
case action do
_ -> state
end
end
end
|
