htmlchess/htmlchesslines.html at main · dj-ryan/htmlchess · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta
      name="description"
      content="An html file that can beat you at chess"
    />
    <meta name="keywords" content="Chess, HTML, JavaScript, Stockfish" />
    <meta name="author" content="David Ryan" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />

    <title>htmlchess</title>

    <!-- load libraries-->

    <!-- load jquery library -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

    <!-- load chessboard.js library source code-->
    <script
      src="https://unpkg.com/@chrisoakman/chessboardjs@1.0.0/dist/chessboard-1.0.0.min.js"
      integrity="sha384-8Vi8VHwn3vjQ9eUHUxex3JSN/NFqUg3QbPyX8kWyb93+8AC/pPWTzj+nHtbC5bxD"
      crossorigin="anonymous"
    ></script>

    <!-- load chess.js library-->
    <script src="https://cdn.jsdelivr.net/npm/chess.js@0.11.0/chess.min.js"></script>

    <!-- load stockfish library-->
    <script src="https://cdn.jsdelivr.net/npm/stockfish@11.0.0/src/stockfish.asm.min.js"></script>

    <style>
      /* Row column html styling */
      .column {
        float: left;
        width: 33.33%;
      }

      /* Clear floats after the columns */
      .row:after {
        content: "";
        display: table;
        clear: both;
      }

      .button {
        display: inline-block;
        padding: 10px 20px;
        font-size: 15px;
        cursor: pointer;
        text-align: center;
        text-decoration: none;
        outline: none;
        color: #fff;
        background-color: #33694c;
        border: none;
        border-radius: 15px;
        box-shadow: 0 9px #999;
      }

      .button:hover {
        background-color: #4a986e;
      }

      .button:active {
        background-color: #4a986e;
        box-shadow: 0 5px #666;
        transform: translateY(4px);
      }

      .disabled {
        opacity: 0.6;
        cursor: not-allowed;
      }

      .clearfix-7da63 {
        clear: both;
      }

      .board-b72b1 {
        border: 5px solid #404040;
        box-sizing: content-box;
      }

      .square-55d63 {
        float: left;
        position: relative;
        -webkit-touch-callout: none;
        -webkit-user-select: none;
        -khtml-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
      }

      .white-1e1d7 {
        background-color: #eeeeeb;
        color: #33694c;
      }

      .black-3c85d {
        background-color: #33694c;
        color: #eeeeeb;
      }

      .highlight1-32417,
      .highlight2-9c5d2 {
        box-shadow: inset 0 0 3px 3px #ff0;
      }

      .notation-322f9 {
        cursor: default;
        font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
        font-size: 14px;
        position: absolute;
      }

      .alpha-d2270 {
        bottom: 1px;
        right: 3px;
      }

      .numeric-fc462 {
        top: 2px;
        left: 2px;
      }

      .highlight-white {
        box-shadow: inset 0 0 3px 3px yellow;
      }

      .highlight-black {
        box-shadow: inset 0 0 3px 3px blue;
      }

      #myBoard {
        width: 500px;
        margin: auto;
      }

      #log-container {
        overflow: auto;
        height: 150px;
      }

      .log-warn {
        color: orange;
      }

      .log-error {
        color: red;
      }

      .log-info {
        color: skyblue;
      }

      .log-log {
        color: silver;
      }

      .log-warn,
      .log-error {
        font-weight: bold;
      }
    </style>
  </head>

  <body>
    <h1>htmlchess</h1>

    <div class="row">
      <div class="column">
        <button class="button" id="setBtn">Set Board</button>
        <button class="button" id="clearBtn">Clear Board</button>
        <button class="button" id="startBtn">Start Game</button>

        <button class="button" id="flipOrientationBtn">Flip orientation</button>

        <br />
        <br />

        <button class="button" id="goBackBtn">Back</button>
        <button class="button disabled" id="goFowardBtn">Forward</button>
        <br />
        <br />
        <br />

        <p id="gameEnd"></p>

        <p id="output1"></p>
        <p id="output2"></p>
        <p id="output3"></p>
      </div>
      <div class="column">
        <div id="myBoard"></div>
      </div>
      <div class="column"></div>
    </div>

    <div id="log-container">
      <pre id="log"></pre>
    </div>

    <script>
      // difficulty level

      // TODO be able to change mode and level
      var mode = "level";
      var level = "10";

      var board = null;
      var $board = $("#myBoard");
      var game = new Chess();
      var squareClass = "square-55d63";
      var squareToHighlight = null;
      var colorToHighlight = null;
      var whiteSquareGrey = "#a9a9a9";
      var blackSquareGrey = "#696969";

      var moveList = [];
      var index = 0;

      var userColor = "white";

      var configStart = {
        pieceTheme: pieceTheme,
        draggable: true,
        dropOffBoard: "trash",
        sparePieces: true,
        onDragStart: onDragStart,
        onDrop: onDrop,
        onMouseoutSquare: onMouseoutSquare,
        onMouseoverSquare: onMouseoverSquare,
        //onSnapEnd: onSnapEnd
      };

      var configFree = {
        pieceTheme: pieceTheme,
        draggable: true,
        dropOffBoard: "trash",
        sparePieces: true,
      };

      function initializePage() {
        // TODO initialize page
      }

      function removeHighlights(color) {
        $board.find("." + squareClass).removeClass("highlight-" + color);
      }

      function addHighlights(move) {
        if (game.turn() === "b") {
          removeHighlights("white");
          $board.find(".square-" + move.from).addClass("highlight-white");
          $board.find(".square-" + move.to).addClass("highlight-white");
        } else if (game.turn() === "w") {
          removeHighlights("black");
          $board.find(".square-" + move.from).addClass("highlight-black");
          $board.find(".square-" + move.to).addClass("highlight-black");
        }
      }

      function removeGreySquares() {
        $("#myBoard .square-55d63").css("background", "");
      }

      function greySquare(square) {
        var $square = $("#myBoard .square-" + square);

        var background = whiteSquareGrey;
        if ($square.hasClass("black-3c85d")) {
          background = blackSquareGrey;
        }

        $square.css("background", background);
      }

      function onDragStart(source, piece) {
        // do not pick up pieces if the game is over
        if (game.game_over()) return false;

        // or if it's not that side's turn
        if (
          (game.turn() === "w" && piece.search(/^b/) !== -1) ||
          (game.turn() === "b" && piece.search(/^w/) !== -1)
        ) {
          return false;
        }
      }

      function onDrop(source, target) {
        removeGreySquares();

        // see if the move is legal
        var move = game.move({
          from: source,
          to: target,
          promotion: "q", // NOTE: always promote to a queen for example simplicity
        });

        // illegal move
        if (move === null) return "snapback";

        addHighlights(move);

        checkGameEnd();

        document.getElementById("output2").innerHTML = game.fen();

        moveList.push(game.fen());

        index++;

        stockfishMove();
      }

      function onMouseoverSquare(square, piece) {
        // get list of possible moves for this square
        var moves = game.moves({
          square: square,
          verbose: true,
        });

        // exit if there are no moves available for this square
        if (moves.length === 0) return;

        // highlight the square they moused over
        greySquare(square);

        // highlight the possible squares for this piece
        for (var i = 0; i < moves.length; i++) {
          greySquare(moves[i].to);
        }
      }

      function onMouseoutSquare(square, piece) {
        removeGreySquares();
      }

      function onSnapEnd() {
        board.position(game.fen());
      }

      function onMoveEnd() {
        $board
          .find(".square-" + squareToHighlight)
          .addClass("highlight-" + colorToHighlight);
      }

      function clearBoard() {
        removeHighlights("white");
        removeHighlights("black");
        board.destroy();
        board = Chessboard("myBoard", configFree);

        game = null;
      }

      function setBoard() {
        clearBoard();
        board.start();
      }

      function startGame() {
        game = new Chess();
        game.load(board.fen() + " w KQkq - 0 1");
        board = Chessboard("myBoard", configStart);
        board.position(game.fen());
        moveList.push(game.fen());
        index = 0;

        if (userColor == "black") {
          stockfishMove();
        }
      }

      function flipBoard() {
        board.flip();

        if (userColor === "white") {
          userColor = "black";
        } else userColor = "white";

        console.log(userColor);
      }

      function gameEnd() {
        // TODO write game end function
      }

      // TODO highlight in check square
      function checkCheck() {
        var check = game.in_check();
      }

      function takenPieces() {}

      function checkGameEnd() {
        var winner = "White";
        if (game.turn() == "w") {
          winner = "Black";
        }

        if (game.in_checkmate()) {
          document.getElementById("gameEnd").innerHTML =
            "Game has ended by Checkmate! " + winner + " has won!";
        } else if (game.in_draw()) {
          document.getElementById("gameEnd").innerHTML =
            "Game has ended in a draw!" + winner + " has won!";
        } else if (game.in_stalemate()) {
          document.getElementById("gameEnd").innerHTML =
            "Game has ended in a stalemate!" + winner + " has won!";
        } else if (game.in_threefold_repetition()) {
          document.getElementById("gameEnd").innerHTML =
            "Game has ended by threefold repetition!" + winner + " has won!";
        } else if (game.insufficient_material()) {
          document.getElementById("gameEnd").innerHTML =
            "Game has ended by insufficient material!" + winner + " has won!";
        }
        gameEnd();
      }

      function stepFoward() {
        // TODO write step forward function
      }

      function stepBack() {
        game.undo();
        game.undo();
        board.position(game.fen());

        // if (index > 1) {
        //     console.log("current: " + index + " | " + moveList[index])
        //     index = index - 2
        //     console.log("back: " + + index + " | " + moveList[index])
        //     game.load(moveList[index])
        //     board.position(moveList[index])
        // } else {
        //     // TODO send error message
        // }
      }

      function displayError(error) {
        if ((error = 201)) {
          console.log(" ");
        }
      }

      function stockfishMove() {
        var message = "position fen " + game.fen();

        var goMessage = null;

        if ((mode = "time")) {
          goMessage = "go movetime " + level;
        } else if ((mode = "level")) {
          goMessage = "go depth " + level;
        }
        var bestmove = null;
        var move = null;
        console.log(message);

        stockfish.postMessage(message);
        stockfish.postMessage(goMessage);

        stockfish.onmessage = function (event) {
          //NOTE: Web Workers wrap the response in an object.
          console.log(event.data ? event.data : event);

          // find bestmove substring
          if (event.includes("bestmove")) {
            bestmove = event.substr(9, 4);
            move = game.move(bestmove, { sloppy: true });
            addHighlights(move);
            board.position(game.fen());
            checkGameEnd();
            document.getElementById("output2").innerHTML = game.fen();
            moveList.push(game.fen());
            index++;
          } else {
            document.getElementById("output1").innerHTML = event;
          }
        };
      }

      rewireLoggingToElement(
        () => document.getElementById("log"),
        () => document.getElementById("log-container"),
        true
      );

      function rewireLoggingToElement(
        eleLocator,
        eleOverflowLocator,
        autoScroll
      ) {
        fixLoggingFunc("log");
        fixLoggingFunc("debug");
        fixLoggingFunc("warn");
        fixLoggingFunc("error");
        fixLoggingFunc("info");

        function fixLoggingFunc(name) {
          console["old" + name] = console[name];
          console[name] = function (...arguments) {
            const output = produceOutput(name, arguments);
            const eleLog = eleLocator();

            if (autoScroll) {
              const eleContainerLog = eleOverflowLocator();
              const isScrolledToBottom =
                eleContainerLog.scrollHeight - eleContainerLog.clientHeight <=
                eleContainerLog.scrollTop + 1;
              eleLog.innerHTML += output + "<br>";
              if (isScrolledToBottom) {
                eleContainerLog.scrollTop =
                  eleContainerLog.scrollHeight - eleContainerLog.clientHeight;
              }
            } else {
              eleLog.innerHTML += output + "<br>";
            }

            console["old" + name].apply(undefined, arguments);
          };
        }

        function produceOutput(name, args) {
          return args.reduce((output, arg) => {
            return (
              output +
              '<span class="log-' +
              typeof arg +
              " log-" +
              name +
              '">' +
              (typeof arg === "object" && (JSON || {}).stringify
                ? JSON.stringify(arg)
                : arg) +
              "</span>&nbsp;"
            );
          }, "");
        }
      }

      function pieceTheme(piece) {
        // pull svg piece images from wikipedia
        if (piece == "bB") {
          return "https://upload.wikimedia.org/wikipedia/commons/9/98/Chess_bdt45.svg";
        } else if (piece == "bK") {
          return "https://upload.wikimedia.org/wikipedia/commons/f/f0/Chess_kdt45.svg";
        } else if (piece == "bN") {
          return "https://upload.wikimedia.org/wikipedia/commons/e/ef/Chess_ndt45.svg";
        } else if (piece == "bP") {
          return "https://upload.wikimedia.org/wikipedia/commons/c/c7/Chess_pdt45.svg";
        } else if (piece == "bQ") {
          return "https://upload.wikimedia.org/wikipedia/commons/4/47/Chess_qdt45.svg";
        } else if (piece == "bR") {
          return "https://upload.wikimedia.org/wikipedia/commons/f/ff/Chess_rdt45.svg";
        } else if (piece == "wB") {
          return "https://upload.wikimedia.org/wikipedia/commons/b/b1/Chess_blt45.svg";
        } else if (piece == "wK") {
          return "https://upload.wikimedia.org/wikipedia/commons/4/42/Chess_klt45.svg";
        } else if (piece == "wN") {
          return "https://upload.wikimedia.org/wikipedia/commons/7/70/Chess_nlt45.svg";
        } else if (piece == "wP") {
          return "https://upload.wikimedia.org/wikipedia/commons/4/45/Chess_plt45.svg";
        } else if (piece == "wQ") {
          return "https://upload.wikimedia.org/wikipedia/commons/1/15/Chess_qlt45.svg";
        } else if (piece == "wR") {
          return "https://upload.wikimedia.org/wikipedia/commons/7/72/Chess_rlt45.svg";
        }
      }

      var board = Chessboard("myBoard", configFree);
      var stockfish = STOCKFISH();

      stockfish.onmessage = function (event) {
          //NOTE: Web Workers wrap the response in an object.
          console.log(event.data ? event.data : event);

          // find bestmove substring
          if (event.includes("bestmove")) {
            bestmove = event.substr(9, 4);
            move = game.move(bestmove, { sloppy: true });
            addHighlights(move);
            board.position(game.fen());
            checkGameEnd();
            document.getElementById("output2").innerHTML = game.fen();
            moveList.push(game.fen());
            index++;
          } else {
            document.getElementById("output1").innerHTML = event;
          }
        };

      // var settings = "setoption name MultiPV value 3"
      // console.log(settings)
      // stockfish.postMessage(settings)

      // settings = "debug on"
      // console.log(settings)
      // stockfish.postMessage(settings)

      // settings = "setoption UCI_ShowWDL"
      // console.log(settings)
      // stockfish.postMessage(settings)

      $("#setBtn").on("click", setBoard);
      $("#clearBtn").on("click", clearBoard);
      $("#startBtn").on("click", startGame);

      $("#goBackBtn").on("click", stepBack);
      $("#goFowardBtn").on("click", stepFoward);

      $("#flipOrientationBtn").on("click", flipBoard);
    </script>
  </body>
</html>