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         for (var i = 0; i < moves.length; ++i) {
 161                 var move = moves[i];
 162                 var line = [];
 163
 164                 var white = parseInt(move['white']);
 165                 var draw = parseInt(move['draw']);
 166                 var black = parseInt(move['black']);
 167
 168                 line.push(move['move']);  // Move.
 169                 var num = white + draw + black;
 170                 line.push(num);  // N.
 171                 line.push(num / total_num);  // %.
 172
 173                 // Win%.
 174                 var white_win_ratio = (white + 0.5 * draw) / num;
 175                 var win_ratio = (game.turn() == 'w') ? white_win_ratio : 1.0 - white_win_ratio;
 176                 line.push(win_ratio);
 177
 178                 line.push(white);        // WWin.
 179                 line.push(white / num);  // %WW.
 180                 line.push(black);        // BWin.
 181                 line.push(black / num);  // %BW.
 182                 line.push(draw);         // Draw.
 183                 line.push(draw / num);   // %Draw.
 184
 185                 if (move['num_elo'] >= 10) {
 186                         // Elo.
 187                         line.push(move['white_avg_elo']);
 188                         line.push(move['black_avg_elo']);
 189                         line.push(move['white_avg_elo'] - move['black_avg_elo']);
 190
 191                         // Win% corrected for Elo.
 192                         var win_elo = -400.0 * Math.log(1.0 / white_win_ratio - 1.0) / Math.LN10;
 193                         win_elo -= (move['white_avg_elo'] - move['black_avg_elo']);
 194                         white_win_ratio = 1.0 / (1.0 + Math.pow(10, win_elo / -400.0));
 195                         win_ratio = (game.turn() == 'w') ? white_win_ratio : 1.0 - white_win_ratio;
 196                         line.push(win_ratio);
 197                 } else {
 198                         line.push(null);
 199                         line.push(null);
 200                         line.push(null);
 201                         line.push(null);
 202                 }
 203                 lines.push(line);
 204         }
 205
 206         lines.sort(function(a, b) { return direction * ( b[sort_by] - a[sort_by]); });
 207
 208         var tbl = $("#lines");
 209         tbl.empty();
 210
 211         for (var i = 0; i < moves.length; ++i) {
 212                 var line = lines[i];
 213                 var tr = document.createElement("tr");
 214
 215                 if (line[0] === undefined) {
 216                         $(tr).addClass("totals");
 217                 }
 218
 219                 for (var j = 0; j < line.length; ++j) {
 220                         if (line[j] === null) {
 221                                 add_td(tr, "");
 222                         } else if (headings[j][1] == TYPE_MOVE) {
 223                                 var td = document.createElement("td");
 224                                 tr.appendChild(td);
 225                                 $(td).addClass("move");
 226                                 if (line[j] !== undefined) {
 227                                         if (move_override % 2 == 0) {
 228                                                 $(td).text(((move_override / 2) + 1) + ". ");
 229                                         } else {
 230                                                 $(td).text(((move_override / 2) + 0.5) + "…");
 231                                         }
 232                                 }
 233
 234                                 var move_a = document.createElement("a");
 235                                 move_a.href = "javascript:make_move('" + line[j] + "')";
 236                                 td.appendChild(move_a);
 237                                 $(move_a).text(line[j]);
 238                         } else if (headings[j][1] == TYPE_INTEGER) {
 239                                 add_td(tr, line[j]);
 240                         } else if (headings[j][1] == TYPE_FLOAT) {
 241                                 add_td(tr, line[j].toFixed(1));
 242                         } else {
 243                                 add_td(tr, (100.0 * line[j]).toFixed(1) + "%");
 244                         }
 245                 }
 246
 247                 tbl.append(tr);
 248         }
 249 }
 250
 251 var set_includetransp = function(value) {
 252         includetransp = value;
 253         update();
 254 }
 255 window['set_includetransp'] = set_includetransp;
 256
 257 var make_move = function(move) {
 258         if (move_override < history.length && history[move_override] == move) {
 259                 // User effectively only moved forward in history.
 260                 ++move_override;
 261         } else {
 262                 history.length = move_override;
 263                 history.push(move);
 264                 move_override = history.length;
 265         }
 266         update();
 267 }
 268 window['make_move'] = make_move;
 269
 270 var prev_move = function() {
 271         if (move_override > 0) {
 272                 --move_override;
 273                 update();
 274         }
 275 }
 276 window['prev_move'] = prev_move;
 277
 278 var next_move = function() {
 279         if (move_override < history.length) {
 280                 ++move_override;
 281                 update();
 282         }
 283 }
 284 window['next_move'] = next_move;
 285
 286 var set_move = function(n) {
 287         move_override = n;
 288         update();
 289 }
 290 window['set_move'] = set_move;
 291
 292 // almost all of this stuff comes from the chessboard.js example page
 293 var onDragStart = function(source, piece, position, orientation) {
 294         var game = get_game();
 295         if (game.game_over() === true ||
 296             (game.turn() === 'w' && piece.search(/^b/) !== -1) ||
 297             (game.turn() === 'b' && piece.search(/^w/) !== -1)) {
 298                 return false;
 299         }
 300 }
 301
 302 var onDrop = function(source, target) {
 303         // see if the move is legal
 304         var game = get_game();
 305         var move = game.move({
 306                 from: source,
 307                 to: target,
 308                 promotion: 'q' // NOTE: always promote to a queen for example simplicity
 309         });
 310
 311         // illegal move
 312         if (move === null) return 'snapback';
 313
 314         var new_history = game.history({ verbose: true });
 315         history = [];
 316         for (var i = 0; i < new_history.length; ++i) {
 317                 history.push(new_history[i].san);
 318         }
 319         move_override = history.length;
 320 };
 321
 322 // update the board position after the piece snap
 323 // for castling, en passant, pawn promotion
 324 var onSnapEnd = function() {
 325         var game = get_game();
 326         board.position(game.fen());
 327         update();
 328 };
 329
 330 var init = function() {
 331         // Create board.
 332         board = new window.ChessBoard('board', {
 333                 draggable: true,
 334                 position: 'start',
 335                 onDragStart: onDragStart,
 336                 onDrop: onDrop,
 337                 onSnapEnd: onSnapEnd
 338         });
 339         update();
 340
 341         $(window).keyup(function(event) {
 342                 if (event.which == 39) {
 343                         next_move();
 344                 } else if (event.which == 37) {
 345                         prev_move();
 346                 }
 347         });
 348 }
 349
 350
 351 $(document).ready(init);
 352
 353 })();