public/javascripts/components/game.js

   1 // Game logic on a variant page: 3 modes, analyze, computer or human
   2 // TODO: envoyer juste "light move", sans FEN ni notation ...etc
   3 // TODO: if I'm an observer and player(s) disconnect/reconnect, how to find me ?
   4 Vue.component('my-game', {
   5     // gameId: to find the game in storage (assumption: it exists)
   6     // fen: to start from a FEN without identifiers (analyze mode)
   7     // subMode: "auto" (game comp vs comp) or "corr" (correspondance game),
   8     // or "examine" (after human game: TODO)
   9     props: ["conn","gameId","fen","mode","subMode","allowChat","allowMovelist",
  10         "queryHash","settings"],
  11     data: function() {
  12         return {
  13             // Web worker to play computer moves without freezing interface:
  14             compWorker: new Worker('/javascripts/playCompMove.js'),
  15             timeStart: undefined, //time when computer starts thinking
  16             vr: null, //VariantRules object, describing the game state + rules
  17             endgameMessage: "",
  18             orientation: "w",
  19             lockCompThink: false, //used to avoid some ghost moves
  20             myname: user.name, //may be anonymous (thus no name)
  21             opponents: {}, //filled later (potentially 2 or 3 opponents)
  22             drawOfferSent: false, //did I just ask for draw?
  23             people: {}, //observers
  24             score: "*", //'*' means 'unfinished'
  25             // userColor: given by gameId, or fen in problems mode (if no game Id)...
  26             mycolor: "w",
  27             fenStart: "",
  28             moves: [], //TODO: initialize if gameId is defined...
  29             cursor: -1, //index of the move just played
  30             lastMove: null,
  31         };
  32     },
  33     watch: {
  34         fen: function(newFen) {
  35             // (Security) No effect if a computer move is in progress:
  36             if (this.mode == "computer" && this.lockCompThink)
  37                 return this.$emit("computer-think");
  38             this.newGameFromFen(newFen);
  39         },
  40         gameId: function() {
  41             this.loadGame();
  42         },
  43         queryHash: function(newQhash) {
  44             // New query hash = "id=42"; get 42 as gameId
  45             this.gameId = parseInt(newQhash.substr(2));
  46             this.loadGame();
  47         },
  48     },
  49     computed: {
  50         showChat: function() {
  51             return this.allowChat && this.mode=='human' && this.score != '*';
  52         },
  53         showMoves: function() {
  54             return true;
  55             return this.allowMovelist && window.innerWidth >= 768;
  56         },
  57         showFen: function() {
  58             return variant.name != "Dark" || this.score != "*";
  59         },
  60     },
  61     // Modal end of game, and then sub-components
  62     template: `
  63         <div class="col-sm-12 col-md-10 col-md-offset-1 col-lg-8 col-lg-offset-2">
  64             <input id="modal-eog" type="checkbox" class="modal"/>
  65             <div role="dialog" aria-labelledby="eogMessage">
  66                 <div class="card smallpad small-modal text-center">
  67                     <label for="modal-eog" class="modal-close">
  68                     </label>
  69                     <h3 id="eogMessage" class="section">
  70                         {{ endgameMessage }}
  71                     </h3>
  72                 </div>
  73             </div>
  74             <my-chat v-if="showChat" :conn="conn" :myname="myname"
  75                 :opponents="opponents" :people="people">
  76             </my-chat>
  77             <my-board v-bind:vr="vr" :last-move="lastMove" :mode="mode"
  78                 :orientation="orientation" :user-color="mycolor" :settings="settings"
  79                 @play-move="play">
  80             </my-board>
  81             <div class="button-group">
  82                 <button @click="() => play()">Play</button>
  83                 <button @click="() => undo()">Undo</button>
  84                 <button @click="flip">Flip</button>
  85                 <button @click="gotoBegin">GotoBegin</button>
  86                 <button @click="gotoEnd">GotoEnd</button>
  87             </div>
  88             <div v-if="mode=='human'" class="button-group">
  89                 <button @click="offerDraw">Draw</button>
  90                 <button @click="abortGame">Abort</button>
  91                 <button @click="resign">Resign</button>
  92             </div>
  93             <div v-if="mode=='human' && subMode=='corr'">
  94                 <textarea v-show="score=='*' && vr.turn==mycolor" v-model="corrMsg">
  95                 </textarea>
  96                 <div v-show="cursor>=0">
  97                     {{ moves[cursor].message }}
  98                 </div>
  99             </div>
 100             <div v-if="showFen && !!vr" id="fen-div" class="section-content">
 101                 <p id="fen-string" class="text-center">
 102                     {{ vr.getFen() }}
 103                 </p>
 104             </div>
 105             <div id="pgn-div" class="section-content">
 106                 <a id="download" href="#">
 107                 </a>
 108                 <div class="button-group">
 109                     <button id="downloadBtn" @click="download">
 110                         {{ translate("Download PGN") }}
 111                     </button>
 112                     <button>Import game</button>
 113                 </div>
 114             </div>
 115             <my-move-list v-if="showMoves" :moves="moves" :cursor="cursor" @goto-move="gotoMove">
 116             </my-move-list>
 117         </div>
 118     `,
 119     created: function() {
 120         if (!!this.gameId)
 121             this.loadGame();
 122         else if (!!this.fen)
 123         {
 124             this.vr = new VariantRules(this.fen);
 125             this.fenStart = this.fen;
 126         }
 127         // TODO: also handle "draw accepted" (use opponents array?)
 128         // --> must give this info also when sending lastState...
 129         // and, if all players agree then OK draw (end game ...etc)
 130         const socketMessageListener = msg => {
 131             const data = JSON.parse(msg.data);
 132             let L = undefined;
 133             switch (data.code)
 134             {
 135                 case "newmove": //..he played!
 136                     this.play(data.move, variant.name!="Dark" ? "animate" : null);
 137                     break;
 138                 case "pong": //received if we sent a ping (game still alive on our side)
 139                     if (this.gameId != data.gameId)
 140                         break; //games IDs don't match: definitely over...
 141                     this.oppConnected = true;
 142                     // Send our "last state" informations to opponent(s)
 143                     L = this.vr.moves.length;
 144                     Object.keys(this.opponents).forEach(oid => {
 145                         this.conn.send(JSON.stringify({
 146                             code: "lastate",
 147                             oppid: oid,
 148                             gameId: this.gameId,
 149                             lastMove: (L>0?this.vr.moves[L-1]:undefined),
 150                             movesCount: L,
 151                         }));
 152                     });
 153                     break;
 154                 // TODO: refactor this, because at 3 or 4 players we may have missed 2 or 3 moves (not just one)
 155                 case "lastate": //got opponent infos about last move
 156                     L = this.vr.moves.length;
 157                     if (this.gameId != data.gameId)
 158                         break; //games IDs don't match: nothing we can do...
 159                     // OK, opponent still in game (which might be over)
 160                     if (this.score != "*")
 161                     {
 162                         // We finished the game (any result possible)
 163                         this.conn.send(JSON.stringify({
 164                             code: "lastate",
 165                             oppid: data.oppid,
 166                             gameId: this.gameId,
 167                             score: this.score,
 168                         }));
 169                     }
 170                     else if (!!data.score) //opponent finished the game
 171                         this.endGame(data.score);
 172                     else if (data.movesCount < L)
 173                     {
 174                         // We must tell last move to opponent
 175                         this.conn.send(JSON.stringify({
 176                             code: "lastate",
 177                             oppid: this.opponent.id,
 178                             gameId: this.gameId,
 179                             lastMove: this.vr.moves[L-1],
 180                             movesCount: L,
 181                         }));
 182                     }
 183                     else if (data.movesCount > L) //just got last move from him
 184                         this.play(data.lastMove, "animate");
 185                     break;
 186                 case "resign": //..you won!
 187                     this.endGame(this.mycolor=="w"?"1-0":"0-1");
 188                     break;
 189                 // TODO: also use (dis)connect info to count online players?
 190                 case "connect":
 191                 case "disconnect":
 192                     if (this.mode=="human")
 193                     {
 194                         const online = (data.code == "connect");
 195                         // If this is an opponent ?
 196                         if (!!this.opponents[data.id])
 197                             this.opponents[data.id].online = online;
 198                         else
 199                         {
 200                             // Or an observer ?
 201                             if (!online)
 202                                 delete this.people[data.id];
 203                             else
 204                                 this.people[data.id] = data.name;
 205                         }
 206                     }
 207                     break;
 208             }
 209         };
 210         const socketCloseListener = () => {
 211             this.conn.addEventListener('message', socketMessageListener);
 212             this.conn.addEventListener('close', socketCloseListener);
 213         };
 214         if (!!this.conn)
 215         {
 216             this.conn.onmessage = socketMessageListener;
 217             this.conn.onclose = socketCloseListener;
 218         }
 219         // Computer moves web worker logic: (TODO: also for observers in HH games ?)
 220         this.compWorker.postMessage(["scripts",variant.name]);
 221         this.compWorker.onmessage = e => {
 222             this.lockCompThink = true; //to avoid some ghost moves
 223             let compMove = e.data;
 224             if (!Array.isArray(compMove))
 225                 compMove = [compMove]; //to deal with MarseilleRules
 226             // Small delay for the bot to appear "more human"
 227             const delay = Math.max(500-(Date.now()-this.timeStart), 0);
 228             setTimeout(() => {
 229                 const animate = variant.name != "Dark";
 230                 this.play(compMove[0], animate);
 231                 if (compMove.length == 2)
 232                     setTimeout( () => { this.play(compMove[1], animate); }, 750);
 233                 else //250 == length of animation (TODO: should be a constant somewhere)
 234                     setTimeout( () => this.lockCompThink = false, 250);
 235             }, delay);
 236         }
 237     },
 238     // dans variant.js (plutôt room.js) conn gère aussi les challenges
 239     // et les chats dans chat.js. Puis en webRTC, repenser tout ça.
 240     methods: {
 241         offerDraw: function() {
 242             if (!confirm("Offer draw?"))
 243                 return;
 244             // Stay in "draw offer sent" state until next move is played
 245             this.drawOfferSent = true;
 246             if (this.subMode == "corr")
 247             {
 248                 // TODO: set drawOffer on in game (how ?)
 249             }
 250             else //live game
 251             {
 252                 this.opponents.forEach(o => {
 253                     if (!!o.online)
 254                     {
 255                         try {
 256                             this.conn.send(JSON.stringify({code: "draw", oppid: o.id}));
 257                         } catch (INVALID_STATE_ERR) {
 258                             return;
 259                         }
 260                     }
 261                 });
 262             }
 263         },
 264         // + conn handling: "draw" message ==> agree for draw (if we have "drawOffered" at true)
 265         receiveDrawOffer: function() {
 266             //if (...)
 267             // TODO: ignore if preventDrawOffer is set; otherwise show modal box with option "prevent future offers"
 268             // if accept: send message "draw"
 269         },
 270         abortGame: function() {
 271             if (!confirm("Abort the game?"))
 272                 return;
 273             //+ bouton "abort" avec score == "?" + demander confirmation pour toutes ces actions,
 274             //send message: "gameOver" avec score "?"
 275         },
 276         resign: function(e) {
 277             if (!confirm("Resign the game?"))
 278                 return;
 279             if (this.mode == "human" && this.oppConnected(this.oppid))
 280             {
 281                 try {
 282                     this.conn.send(JSON.stringify({code: "resign", oppid: this.oppid}));
 283                 } catch (INVALID_STATE_ERR) {
 284                     return;
 285                 }
 286             }
 287             this.endGame(this.mycolor=="w"?"0-1":"1-0");
 288         },
 289         translate: translate,
 290         newGameFromFen: function(fen) {
 291             this.vr = new VariantRules(fen);
 292             this.moves = [];
 293             this.cursor = -1;
 294             this.fenStart = newFen;
 295             this.score = "*";
 296             if (this.mode == "analyze")
 297             {
 298                 this.mycolor = V.ParseFen(newFen).turn;
 299                 this.orientation = this.mycolor;
 300             }
 301             else if (this.mode == "computer") //only other alternative (HH with gameId)
 302             {
 303                 this.mycolor = (Math.random() < 0.5 ? "w" : "b");
 304                 this.orientation = this.mycolor;
 305                 this.compWorker.postMessage(["init",newFen]);
 306                 if (this.mycolor != "w" || this.subMode == "auto")
 307                     this.playComputerMove();
 308             }
 309         },
 310         loadGame: function() {
 311             const game = getGameFromStorage(this.gameId);
 312             this.opponent.id = game.oppid; //opponent ID in case of running HH game
 313             this.opponent.name = game.oppname; //maye be blank (if anonymous)
 314             this.score = game.score;
 315             this.mycolor = game.mycolor;
 316             this.fenStart = game.fenStart;
 317             this.moves = game.moves;
 318             this.cursor = game.moves.length-1;
 319             this.lastMove = (game.moves.length > 0 ? game.moves[this.cursor] : null);
 320         },
 321         setEndgameMessage: function(score) {
 322             let eogMessage = "Undefined";
 323             switch (score)
 324             {
 325                 case "1-0":
 326                     eogMessage = translations["White win"];
 327                     break;
 328                 case "0-1":
 329                     eogMessage = translations["Black win"];
 330                     break;
 331                 case "1/2":
 332                     eogMessage = translations["Draw"];
 333                     break;
 334                 case "?":
 335                     eogMessage = "Unfinished";
 336                     break;
 337             }
 338             this.endgameMessage = eogMessage;
 339         },
 340         download: function() {
 341             const content = this.getPgn();
 342             // Prepare and trigger download link
 343             let downloadAnchor = document.getElementById("download");
 344             downloadAnchor.setAttribute("download", "game.pgn");
 345             downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 346             downloadAnchor.click();
 347         },
 348         getPgn: function() {
 349             let pgn = "";
 350             pgn += '[Site "vchess.club"]\n';
 351             const opponent = (this.mode=="human" ? "Anonymous" : "Computer");
 352             pgn += '[Variant "' + variant.name + '"]\n';
 353             pgn += '[Date "' + getDate(new Date()) + '"]\n';
 354             const whiteName = ["human","computer"].includes(this.mode)
 355                 ? (this.mycolor=='w'?'Myself':opponent)
 356                 : "analyze";
 357             const blackName = ["human","computer"].includes(this.mode)
 358                 ? (this.mycolor=='b'?'Myself':opponent)
 359                 : "analyze";
 360             pgn += '[White "' + whiteName + '"]\n';
 361             pgn += '[Black "' + blackName + '"]\n';
 362             pgn += '[Fen "' + this.fenStart + '"]\n';
 363             pgn += '[Result "' + this.score + '"]\n\n';
 364             let counter = 1;
 365             let i = 0;
 366             while (i < this.moves.length)
 367             {
 368                 pgn += (counter++) + ".";
 369                 for (let color of ["w","b"])
 370                 {
 371                     let move = "";
 372                     while (i < this.moves.length && this.moves[i].color == color)
 373                         move += this.moves[i++].notation[0] + ",";
 374                     move = move.slice(0,-1); //remove last comma
 375                     pgn += move + (i < this.moves.length-1 ? " " : "");
 376                 }
 377             }
 378             return pgn + "\n";
 379         },
 380         showScoreMsg: function(score) {
 381             this.setEndgameMessage(score);
 382             let modalBox = document.getElementById("modal-eog");
 383             modalBox.checked = true;
 384             setTimeout(() => { modalBox.checked = false; }, 2000);
 385         },
 386         endGame: function(score) {
 387             this.score = score;
 388             this.showScoreMsg(score);
 389             if (this.mode == "human")
 390                 localStorage["score"] = score;
 391             this.$emit("game-over");
 392         },
 393         oppConnected: function(uid) {
 394             return this.opponents.any(o => o.id == uidi && o.online);
 395         },
 396         playComputerMove: function() {
 397             this.timeStart = Date.now();
 398             this.compWorker.postMessage(["askmove"]);
 399         },
 400         animateMove: function(move) {
 401             let startSquare = document.getElementById(getSquareId(move.start));
 402             let endSquare = document.getElementById(getSquareId(move.end));
 403             let rectStart = startSquare.getBoundingClientRect();
 404             let rectEnd = endSquare.getBoundingClientRect();
 405             let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 406             let movingPiece =
 407                 document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 408             // HACK for animation (with positive translate, image slides "under background")
 409             // Possible improvement: just alter squares on the piece's way...
 410             squares = document.getElementsByClassName("board");
 411             for (let i=0; i<squares.length; i++)
 412             {
 413                 let square = squares.item(i);
 414                 if (square.id != getSquareId(move.start))
 415                     square.style.zIndex = "-1";
 416             }
 417             movingPiece.style.transform = "translate(" + translation.x + "px," +
 418                 translation.y + "px)";
 419             movingPiece.style.transitionDuration = "0.2s";
 420             movingPiece.style.zIndex = "3000";
 421             setTimeout( () => {
 422                 for (let i=0; i<squares.length; i++)
 423                     squares.item(i).style.zIndex = "auto";
 424                 movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 425                 this.play(move);
 426             }, 250);
 427         },
 428         play: function(move, programmatic) {
 429             let navigate = !move;
 430             // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 431             // (except if we receive opponent's move, human or computer)
 432             if (!navigate && this.mode != "analyze" && !programmatic
 433                 && this.cursor < this.moves.length-1)
 434             {
 435                 return;
 436             }
 437             if (navigate)
 438             {
 439                 if (this.cursor == this.moves.length-1)
 440                     return; //no more moves
 441                 move = this.moves[this.cursor+1];
 442             }
 443             if (!!programmatic) //computer or (remote) human opponent
 444             {
 445                 if (this.cursor < this.moves.length-1)
 446                     this.gotoEnd(); //required to play the move
 447                 return this.animateMove(move);
 448             }
 449             // Not programmatic, or animation is over
 450             if (this.mode == "human" && this.subMode == "corr" && this.mycolor == this.vr.turn)
 451             {
 452                 // TODO: show confirm box "validate move ?"
 453             }
 454             if (!move.notation)
 455                 move.notation = this.vr.getNotation(move);
 456             if (!move.color)
 457                 move.color = this.vr.turn;
 458             this.vr.play(move);
 459             this.cursor++;
 460             this.lastMove = move;
 461             if (!move.fen)
 462                 move.fen = this.vr.getFen();
 463             if (this.settings.sound == 2)
 464                 new Audio("/sounds/move.mp3").play().catch(err => {});
 465             if (this.mode == "human")
 466             {
 467                 updateStorage(move); //after our moves and opponent moves
 468                 if (this.vr.turn == this.mycolor)
 469                     this.conn.send(JSON.stringify({code:"newmove", move:move, oppid:this.oppid}));
 470             }
 471             else if (this.mode == "computer")
 472             {
 473                 // Send the move to web worker (including his own moves)
 474                 this.compWorker.postMessage(["newmove",move]);
 475             }
 476             if (!navigate && (this.score == "*" || this.mode == "analyze"))
 477             {
 478                 // Stack move on movesList at current cursor
 479                 if (this.cursor == this.moves.length)
 480                     this.moves.push(move);
 481                 else
 482                     this.moves = this.moves.slice(0,this.cursor-1).concat([move]);
 483             }
 484             // Is opponent in check?
 485             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 486             const score = this.vr.getCurrentScore();
 487             if (score != "*")
 488             {
 489                 if (["human","computer"].includes(this.mode))
 490                     this.endGame(score);
 491                 else //just show score on screen (allow undo)
 492                     this.showScoreMsg(score);
 493             }
 494             // subTurn condition for Marseille (and Avalanche) rules
 495             else if ((this.mode == "computer" && (!this.vr.subTurn || this.vr.subTurn <= 1))
 496                 && (this.subMode == "auto" || this.vr.turn != this.mycolor))
 497             {
 498                 this.playComputerMove();
 499             }
 500             // https://vuejs.org/v2/guide/list.html#Caveats (also for undo)
 501             if (navigate)
 502                 this.$children[0].$forceUpdate(); //TODO!?
 503         },
 504         undo: function(move) {
 505             let navigate = !move;
 506             if (navigate)
 507             {
 508                 if (this.cursor < 0)
 509                     return; //no more moves
 510                 move = this.moves[this.cursor];
 511             }
 512             this.vr.undo(move);
 513             this.cursor--;
 514             this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 515             if (this.settings.sound == 2)
 516                 new Audio("/sounds/undo.mp3").play().catch(err => {});
 517             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 518             if (navigate)
 519                 this.$children[0].$forceUpdate(); //TODO!?
 520             else if (this.mode == "analyze") //TODO: can this happen?
 521                 this.moves.pop();
 522         },
 523         gotoMove: function(index) {
 524             this.vr = new VariantRules(this.moves[index].fen);
 525             this.cursor = index;
 526             this.lastMove = this.moves[index];
 527         },
 528         gotoBegin: function() {
 529             this.vr = new VariantRules(this.fenStart);
 530             this.cursor = -1;
 531             this.lastMove = null;
 532         },
 533         gotoEnd: function() {
 534             this.gotoMove(this.moves.length-1);
 535         },
 536         flip: function() {
 537             this.orientation = V.GetNextCol(this.orientation);
 538         },
 539     },
 540 })