git.sesse.net Git - remoteglot-book/blob - www/js/book.js

   1 (function() {
   2
   3 var board = null;
   4 var history = [];
   5 var move_override = 0;
   6 var includetransp = true;
   7
   8 var entity_map = {
   9         "&": "&amp;",
  10         "<": "&lt;",
  11         ">": "&gt;",
  12         '"': '&quot;',
  13         "'": '&#39;',
  14 };
  15
  16 function escape_html(string) {
  17         return String(string).replace(/[&<>"']/g, function (s) {
  18                 return entity_map[s];
  19         });
  20 }
  21
  22 var get_game = function(skip_last_move) {
  23         var moves_to_drop = 0;
  24         if (skip_last_move === true) {
  25                 moves_to_drop = 1;
  26         }
  27
  28         var game = new Chess();
  29         for (var i = 0; i < move_override - moves_to_drop; ++i) {
  30                 game.move(history[i]);
  31         }
  32         return game;
  33 }
  34
  35 var update = function() {
  36         var text = "";
  37         for (var i = 0; i < history.length; ++i) {
  38                 if (i % 2 == 0) {
  39                         text += (i/2 + 1) + ". ";
  40                 }
  41                 if (i + 1 == move_override) {
  42                         text += '<strong>' + history[i] + '</strong>';
  43                 } else {
  44                         text += '<a href="javascript:set_move(' + (i + 1) + ')">' + history[i] + '</a>';
  45                 }
  46                 text += " ";
  47         }
  48         $('#gamehistory').html(text);
  49
  50         var game = get_game();
  51         board.position(game.fen());
  52
  53         var all_moves = game.history({ verbose: true });
  54         if (all_moves.length > 0) {
  55                 var last_move = all_moves.pop();
  56                 var highlight_from = last_move.from;
  57                 var highlight_to = last_move.to;
  58                 $("#board").find('.square-55d63').removeClass('nonuglyhighlight');
  59                 $("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight');
  60                 $("#board").find('.square-' + highlight_to).addClass('nonuglyhighlight');
  61         }
  62
  63         fetch_analysis();
  64 }
  65
  66 var fetch_analysis = function() {
  67         var game = get_game();
  68         var fen = game.fen();
  69         $.ajax({
  70                 url: "/opening-stats.pl?fen=" + encodeURIComponent(fen) +
  71                         ";includetransp=" + (includetransp ? 1 : 0)
  72         }).done(function(data, textstatus, xhr) {
  73                 show_lines(data, game);
  74         });
  75 }
  76
  77 var add_td = function(tr, value) {
  78         var td = document.createElement("td");
  79         tr.appendChild(td);
  80         $(td).addClass("num");
  81         $(td).text(value);
  82 }
  83
  84 var TYPE_MOVE = 0;
  85 var TYPE_INTEGER = 1;
  86 var TYPE_FLOAT = 2;
  87 var TYPE_RATIO = 3;
  88
  89 var headings = [
  90         [ "Move", TYPE_MOVE ],
  91         [ "Games", TYPE_INTEGER ],
  92         [ "%", TYPE_RATIO ],
  93         [ "Win%", TYPE_RATIO ],
  94         [ "WWin", TYPE_INTEGER ],
  95         [ "%WW", TYPE_RATIO ],
  96         [ "Bwin", TYPE_INTEGER ],
  97         [ "%BW", TYPE_RATIO ],
  98         [ "Draw", TYPE_INTEGER ],
  99         [ "Draw%", TYPE_RATIO ],
 100         [ "AvWElo", TYPE_FLOAT ],
 101         [ "AvBElo", TYPE_FLOAT ],
 102         [ "EloVar", TYPE_FLOAT ],
 103         [ "AWin%", TYPE_RATIO ],
 104 ];
 105 var sort_by = 1;
 106 var direction = 1;
 107
 108 var show_lines = function(data, game) {
 109         var moves = data['moves'];
 110         $('#numviewers').text(data['opening']);
 111
 112         if (data['root_game']) {
 113                 var text = escape_html(data['root_game']['white']);
 114                 if (data['root_game']['white_elo']) {
 115                         text += " (" + escape_html(data['root_game']['white_elo']) + ")";
 116                 }
 117                 text += " &ndash; " + escape_html(data['root_game']['black']);
 118                 if (data['root_game']['black_elo']) {
 119                         text += " (" + escape_html(data['root_game']['black_elo']) + ")";
 120                 }
 121                 text += " &nbsp;" + escape_html(data['root_game']['result']).replace(/-/, "&ndash;") + "<br />";
 122                 if (data['root_game']['eco']) {
 123                         text += "[" + escape_html(data['root_game']['eco']) + "] ";
 124                 }
 125                 text += "(" + data['root_game']['moves'] + ") ";
 126                 text += escape_html(data['root_game']['event']) + " &nbsp;" + escape_html(data['root_game']['date']);
 127                 $('#gamesummary').html(text);
 128         }
 129
 130         var total_num = 0;
 131         for (var i = 0; i < moves.length; ++i) {
 132                 var move = moves[i];
 133                 if (move['move']) {
 134                         total_num += parseInt(move['white']);
 135                         total_num += parseInt(move['draw']);
 136                         total_num += parseInt(move['black']);
 137                 }
 138         }
 139
 140         var headings_tr = $("#headings");
 141         headings_tr.empty();
 142         for (var i = 0; i < headings.length; ++i) {
 143                 var th = document.createElement("th");
 144                 headings_tr.append(th);
 145                 $(th).text(headings[i][0]);
 146                 (function(new_sort_by) {
 147                         $(th).click(function() {
 148                                 if (sort_by == new_sort_by) {
 149                                         direction = -direction;
 150                                 } else {
 151                                         sort_by = new_sort_by;
 152                                         direction = 1;
 153                                 }
 154                                 show_lines(data, game);
 155                         });
 156                 })(i);
 157         }
 158
 159         var lines = [];
 160         var transpose_only = [];
 161         for (var i = 0; i < moves.length; ++i) {
 162                 var move = moves[i];
 163                 var line = [];
 164
 165                 var white = parseInt(move['white']);
 166                 var draw = parseInt(move['draw']);
 167                 var black = parseInt(move['black']);
 168
 169                 line.push(move['move']);  // Move.
 170                 transpose_only.push(move['transpose_only']);
 171                 var num = white + draw + black;
 172                 line.push(num);  // N.
 173                 line.push(num / total_num);  // %.
 174
 175                 // Win%.
 176                 var white_win_ratio = (white + 0.5 * draw) / num;
 177                 var win_ratio = (game.turn() == 'w') ? white_win_ratio : 1.0 - white_win_ratio;
 178                 line.push(win_ratio);
 179
 180                 line.push(white);        // WWin.
 181                 line.push(white / num);  // %WW.
 182                 line.push(black);        // BWin.
 183                 line.push(black / num);  // %BW.
 184                 line.push(draw);         // Draw.
 185                 line.push(draw / num);   // %Draw.
 186
 187                 if (move['num_elo'] >= 10) {
 188                         // Elo.
 189                         line.push(move['white_avg_elo']);
 190                         line.push(move['black_avg_elo']);
 191                         line.push(move['white_avg_elo'] - move['black_avg_elo']);
 192
 193                         // Win% corrected for Elo.
 194                         var win_elo = -400.0 * Math.log(1.0 / white_win_ratio - 1.0) / Math.LN10;
 195                         win_elo -= (move['white_avg_elo'] - move['black_avg_elo']);
 196                         white_win_ratio = 1.0 / (1.0 + Math.pow(10, win_elo / -400.0));
 197                         win_ratio = (game.turn() == 'w') ? white_win_ratio : 1.0 - white_win_ratio;
 198                         line.push(win_ratio);
 199                 } else {
 200                         line.push(null);
 201                         line.push(null);
 202                         line.push(null);
 203                         line.push(null);
 204                 }
 205                 lines.push(line);
 206         }
 207
 208         lines.sort(function(a, b) { return direction * ( b[sort_by] - a[sort_by]); });
 209
 210         var tbl = $("#lines");
 211         tbl.empty();
 212
 213         for (var i = 0; i < moves.length; ++i) {
 214                 var line = lines[i];
 215                 var tr = document.createElement("tr");
 216
 217                 if (line[0] === undefined) {
 218                         $(tr).addClass("totals");
 219                 } else if (transpose_only[i]) {
 220                         $(tr).addClass("transponly");
 221                 }
 222
 223                 for (var j = 0; j < line.length; ++j) {
 224                         if (line[j] === null) {
 225                                 add_td(tr, "");
 226                         } else if (headings[j][1] == TYPE_MOVE) {
 227                                 var td = document.createElement("td");
 228                                 tr.appendChild(td);
 229                                 $(td).addClass("move");
 230                                 if (line[j] !== undefined) {
 231                                         if (move_override % 2 == 0) {
 232                                                 $(td).text(((move_override / 2) + 1) + ". ");
 233                                         } else {
 234                                                 $(td).text(((move_override / 2) + 0.5) + "…");
 235                                         }
 236                                 }
 237
 238                                 var move_a = document.createElement("a");
 239                                 move_a.href = "javascript:make_move('" + line[j] + "')";
 240                                 td.appendChild(move_a);
 241                                 $(move_a).text(line[j]);
 242                         } else if (headings[j][1] == TYPE_INTEGER) {
 243                                 add_td(tr, line[j]);
 244                         } else if (headings[j][1] == TYPE_FLOAT) {
 245                                 add_td(tr, line[j].toFixed(1));
 246                         } else {
 247                                 add_td(tr, (100.0 * line[j]).toFixed(1) + "%");
 248                         }
 249                 }
 250
 251                 tbl.append(tr);
 252         }
 253 }
 254
 255 var set_includetransp = function(value) {
 256         includetransp = value;
 257         update();
 258 }
 259 window['set_includetransp'] = set_includetransp;
 260
 261 var make_move = function(move) {
 262         if (move_override < history.length && history[move_override] == move) {
 263                 // User effectively only moved forward in history.
 264                 ++move_override;
 265         } else {
 266                 history.length = move_override;
 267                 history.push(move);
 268                 move_override = history.length;
 269         }
 270         update();
 271 }
 272 window['make_move'] = make_move;
 273
 274 var prev_move = function() {
 275         if (move_override > 0) {
 276                 --move_override;
 277                 update();
 278         }
 279 }
 280 window['prev_move'] = prev_move;
 281
 282 var next_move = function() {
 283         if (move_override < history.length) {
 284                 ++move_override;
 285                 update();
 286         }
 287 }
 288 window['next_move'] = next_move;
 289
 290 var set_move = function(n) {
 291         move_override = n;
 292         update();
 293 }
 294 window['set_move'] = set_move;
 295
 296 // almost all of this stuff comes from the chessboard.js example page
 297 var onDragStart = function(source, piece, position, orientation) {
 298         var game = get_game();
 299         if (game.game_over() === true ||
 300             (game.turn() === 'w' && piece.search(/^b/) !== -1) ||
 301             (game.turn() === 'b' && piece.search(/^w/) !== -1)) {
 302                 return false;
 303         }
 304 }
 305
 306 var onDrop = function(source, target) {
 307         // see if the move is legal
 308         var game = get_game();
 309         var move = game.move({
 310                 from: source,
 311                 to: target,
 312                 promotion: 'q' // NOTE: always promote to a queen for example simplicity
 313         });
 314
 315         // illegal move
 316         if (move === null) return 'snapback';
 317
 318         var new_history = game.history({ verbose: true });
 319         history = [];
 320         for (var i = 0; i < new_history.length; ++i) {
 321                 history.push(new_history[i].san);
 322         }
 323         move_override = history.length;
 324 };
 325
 326 // update the board position after the piece snap
 327 // for castling, en passant, pawn promotion
 328 var onSnapEnd = function() {
 329         var game = get_game();
 330         board.position(game.fen());
 331         update();
 332 };
 333
 334 var init = function() {
 335         // Create board.
 336         board = new window.ChessBoard('board', {
 337                 draggable: true,
 338                 position: 'start',
 339                 onDragStart: onDragStart,
 340                 onDrop: onDrop,
 341                 onSnapEnd: onSnapEnd
 342         });
 343         update();
 344
 345         $(window).keyup(function(event) {
 346                 if (event.which == 39) {
 347                         next_move();
 348                 } else if (event.which == 37) {
 349                         prev_move();
 350                 }
 351         });
 352 }
 353
 354
 355 $(document).ready(init);
 356
 357 })();