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 //          onClick :: ask full game to remote player, and register as an observer in game
   5 //          (use gameId to communicate)
   6 //          on landing on game :: if gameId not found locally, check remotely
   7 //          ==> il manque un param dans game : "remoteId"
   8 Vue.component('my-game', {
   9     // gameId: to find the game in storage (assumption: it exists)
  10     // fen: to start from a FEN without identifiers (analyze mode)
  11     // subMode: "auto" (game comp vs comp) or "corr" (correspondance game),
  12     // or "examine" (after human game: TODO)
  13     props: ["conn","gameId","fen","mode","subMode","allowChat","allowMovelist",
  14         "queryHash","settings"],
  15     data: function() {
  16         return {
  17             // Web worker to play computer moves without freezing interface:
  18             compWorker: new Worker('/javascripts/playCompMove.js'),
  19             timeStart: undefined, //time when computer starts thinking
  20             vr: null, //VariantRules object, describing the game state + rules
  21             endgameMessage: "",
  22             orientation: "w",
  23             lockCompThink: false, //used to avoid some ghost moves
  24             myname: user.name, //may be anonymous (thus no name)
  25             opponents: {}, //filled later (potentially 2 or 3 opponents)
  26             drawOfferSent: false, //did I just ask for draw?
  27             people: {}, //observers
  28             score: "*", //'*' means 'unfinished'
  29             // userColor: given by gameId, or fen in problems mode (if no game Id)...
  30             mycolor: "w",
  31             fenStart: "",
  32             moves: [], //TODO: initialize if gameId is defined...
  33             cursor: -1, //index of the move just played
  34             lastMove: null,
  35         };
  36     },
  37     watch: {
  38         fen: function(newFen) {
  39             // (Security) No effect if a computer move is in progress:
  40             if (this.mode == "computer" && this.lockCompThink)
  41                 return this.$emit("computer-think");
  42             this.newGameFromFen(newFen);
  43         },
  44         gameId: function() {
  45             this.loadGame();
  46         },
  47         queryHash: function(newQhash) {
  48             // New query hash = "id=42"; get 42 as gameId
  49             this.gameId = parseInt(newQhash.substr(2));
  50             this.loadGame();
  51         },
  52     },
  53     computed: {
  54         showChat: function() {
  55             return this.allowChat && this.mode=='human' && this.score != '*';
  56         },
  57         showMoves: function() {
  58             return true;
  59             return this.allowMovelist && window.innerWidth >= 768;
  60         },
  61         showFen: function() {
  62             return variant.name != "Dark" || this.score != "*";
  63         },
  64     },
  65     // Modal end of game, and then sub-components
  66     template: `
  67         <div class="col-sm-12 col-md-10 col-md-offset-1 col-lg-8 col-lg-offset-2">
  68             <input id="modal-eog" type="checkbox" class="modal"/>
  69             <div role="dialog" aria-labelledby="eogMessage">
  70                 <div class="card smallpad small-modal text-center">
  71                     <label for="modal-eog" class="modal-close">
  72                     </label>
  73                     <h3 id="eogMessage" class="section">
  74                         {{ endgameMessage }}
  75                     </h3>
  76                 </div>
  77             </div>
  78             <my-chat v-if="showChat" :conn="conn" :myname="myname"
  79                 :opponents="opponents" :people="people">
  80             </my-chat>
  81             <my-board v-bind:vr="vr" :last-move="lastMove" :mode="mode"
  82                 :orientation="orientation" :user-color="mycolor" :settings="settings"
  83                 @play-move="play">
  84             </my-board>
  85             <div class="button-group">
  86                 <button @click="() => play()">Play</button>
  87                 <button @click="() => undo()">Undo</button>
  88                 <button @click="flip">Flip</button>
  89                 <button @click="gotoBegin">GotoBegin</button>
  90                 <button @click="gotoEnd">GotoEnd</button>
  91             </div>
  92             <div v-if="mode=='human'" class="button-group">
  93                 <button @click="offerDraw">Draw</button>
  94                 <button @click="abortGame">Abort</button>
  95                 <button @click="resign">Resign</button>
  96             </div>
  97             <div v-if="mode=='human' && subMode=='corr'">
  98                 <textarea v-show="score=='*' && vr.turn==mycolor" v-model="corrMsg">
  99                 </textarea>
 100                 <div v-show="cursor>=0">
 101                     {{ moves[cursor].message }}
 102                 </div>
 103             </div>
 104             <div v-if="showFen && !!vr" id="fen-div" class="section-content">
 105                 <p id="fen-string" class="text-center">
 106                     {{ vr.getFen() }}
 107                 </p>
 108             </div>
 109             <div id="pgn-div" class="section-content">
 110                 <a id="download" href="#">
 111                 </a>
 112                 <div class="button-group">
 113                     <button id="downloadBtn" @click="download">
 114                         {{ translate("Download PGN") }}
 115                     </button>
 116                     <button>Import game</button>
 117                 </div>
 118             </div>
 119             <my-move-list v-if="showMoves" :moves="moves" :cursor="cursor" @goto-move="gotoMove">
 120             </my-move-list>
 121         </div>
 122     `,
 123     created: function() {
 124         if (!!this.gameId)
 125             this.loadGame();
 126         else if (!!this.fen)
 127         {
 128             this.vr = new VariantRules(this.fen);
 129             this.fenStart = this.fen;
 130         }
 131         // TODO: also handle "draw accepted" (use opponents array?)
 132         // --> must give this info also when sending lastState...
 133         // and, if all players agree then OK draw (end game ...etc)
 134         const socketMessageListener = msg => {
 135             const data = JSON.parse(msg.data);
 136             let L = undefined;
 137             switch (data.code)
 138             {
 139                 case "newmove": //..he played!
 140                     this.play(data.move, variant.name!="Dark" ? "animate" : null);
 141                     break;
 142                 case "pong": //received if we sent a ping (game still alive on our side)
 143                     if (this.gameId != data.gameId)
 144                         break; //games IDs don't match: definitely over...
 145                     this.oppConnected = true;
 146                     // Send our "last state" informations to opponent(s)
 147                     L = this.vr.moves.length;
 148                     Object.keys(this.opponents).forEach(oid => {
 149                         this.conn.send(JSON.stringify({
 150                             code: "lastate",
 151                             oppid: oid,
 152                             gameId: this.gameId,
 153                             lastMove: (L>0?this.vr.moves[L-1]:undefined),
 154                             movesCount: L,
 155                         }));
 156                     });
 157                     break;
 158                 // TODO: refactor this, because at 3 or 4 players we may have missed 2 or 3 moves (not just one)
 159                 case "lastate": //got opponent infos about last move
 160                     L = this.vr.moves.length;
 161                     if (this.gameId != data.gameId)
 162                         break; //games IDs don't match: nothing we can do...
 163                     // OK, opponent still in game (which might be over)
 164                     if (this.score != "*")
 165                     {
 166                         // We finished the game (any result possible)
 167                         this.conn.send(JSON.stringify({
 168                             code: "lastate",
 169                             oppid: data.oppid,
 170                             gameId: this.gameId,
 171                             score: this.score,
 172                         }));
 173                     }
 174                     else if (!!data.score) //opponent finished the game
 175                         this.endGame(data.score);
 176                     else if (data.movesCount < L)
 177                     {
 178                         // We must tell last move to opponent
 179                         this.conn.send(JSON.stringify({
 180                             code: "lastate",
 181                             oppid: this.opponent.id,
 182                             gameId: this.gameId,
 183                             lastMove: this.vr.moves[L-1],
 184                             movesCount: L,
 185                         }));
 186                     }
 187                     else if (data.movesCount > L) //just got last move from him
 188                         this.play(data.lastMove, "animate");
 189                     break;
 190                 case "resign": //..you won!
 191                     this.endGame(this.mycolor=="w"?"1-0":"0-1");
 192                     break;
 193                 // TODO: also use (dis)connect info to count online players?
 194                 case "connect":
 195                 case "disconnect":
 196                     if (this.mode=="human")
 197                     {
 198                         const online = (data.code == "connect");
 199                         // If this is an opponent ?
 200                         if (!!this.opponents[data.id])
 201                             this.opponents[data.id].online = online;
 202                         else
 203                         {
 204                             // Or an observer ?
 205                             if (!online)
 206                                 delete this.people[data.id];
 207                             else
 208                                 this.people[data.id] = data.name;
 209                         }
 210                     }
 211                     break;
 212             }
 213         };
 214         const socketCloseListener = () => {
 215             this.conn.addEventListener('message', socketMessageListener);
 216             this.conn.addEventListener('close', socketCloseListener);
 217         };
 218         if (!!this.conn)
 219         {
 220             this.conn.onmessage = socketMessageListener;
 221             this.conn.onclose = socketCloseListener;
 222         }
 223         // Computer moves web worker logic: (TODO: also for observers in HH games ?)
 224         this.compWorker.postMessage(["scripts",variant.name]);
 225         this.compWorker.onmessage = e => {
 226             this.lockCompThink = true; //to avoid some ghost moves
 227             let compMove = e.data;
 228             if (!Array.isArray(compMove))
 229                 compMove = [compMove]; //to deal with MarseilleRules
 230             // Small delay for the bot to appear "more human"
 231             const delay = Math.max(500-(Date.now()-this.timeStart), 0);
 232             setTimeout(() => {
 233                 const animate = variant.name != "Dark";
 234                 this.play(compMove[0], animate);
 235                 if (compMove.length == 2)
 236                     setTimeout( () => { this.play(compMove[1], animate); }, 750);
 237                 else //250 == length of animation (TODO: should be a constant somewhere)
 238                     setTimeout( () => this.lockCompThink = false, 250);
 239             }, delay);
 240         }
 241     },
 242     // dans variant.js (plutôt room.js) conn gère aussi les challenges
 243     // et les chats dans chat.js. Puis en webRTC, repenser tout ça.
 244     methods: {
 245         offerDraw: function() {
 246             if (!confirm("Offer draw?"))
 247                 return;
 248             // Stay in "draw offer sent" state until next move is played
 249             this.drawOfferSent = true;
 250             if (this.subMode == "corr")
 251             {
 252                 // TODO: set drawOffer on in game (how ?)
 253             }
 254             else //live game
 255             {
 256                 this.opponents.forEach(o => {
 257                     if (!!o.online)
 258                     {
 259                         try {
 260                             this.conn.send(JSON.stringify({code: "draw", oppid: o.id}));
 261                         } catch (INVALID_STATE_ERR) {
 262                             return;
 263                         }
 264                     }
 265                 });
 266             }
 267         },
 268         // + conn handling: "draw" message ==> agree for draw (if we have "drawOffered" at true)
 269         receiveDrawOffer: function() {
 270             //if (...)
 271             // TODO: ignore if preventDrawOffer is set; otherwise show modal box with option "prevent future offers"
 272             // if accept: send message "draw"
 273         },
 274         abortGame: function() {
 275             if (!confirm("Abort the game?"))
 276                 return;
 277             //+ bouton "abort" avec score == "?" + demander confirmation pour toutes ces actions,
 278             //send message: "gameOver" avec score "?"
 279         },
 280         resign: function(e) {
 281             if (!confirm("Resign the game?"))
 282                 return;
 283             if (this.mode == "human" && this.oppConnected(this.oppid))
 284             {
 285                 try {
 286                     this.conn.send(JSON.stringify({code: "resign", oppid: this.oppid}));
 287                 } catch (INVALID_STATE_ERR) {
 288                     return;
 289                 }
 290             }
 291             this.endGame(this.mycolor=="w"?"0-1":"1-0");
 292         },
 293         translate: translate,
 294         newGameFromFen: function(fen) {
 295             this.vr = new VariantRules(fen);
 296             this.moves = [];
 297             this.cursor = -1;
 298             this.fenStart = newFen;
 299             this.score = "*";
 300             if (this.mode == "analyze")
 301             {
 302                 this.mycolor = V.ParseFen(newFen).turn;
 303                 this.orientation = this.mycolor;
 304             }
 305             else if (this.mode == "computer") //only other alternative (HH with gameId)
 306             {
 307                 this.mycolor = (Math.random() < 0.5 ? "w" : "b");
 308                 this.orientation = this.mycolor;
 309                 this.compWorker.postMessage(["init",newFen]);
 310                 if (this.mycolor != "w" || this.subMode == "auto")
 311                     this.playComputerMove();
 312             }
 313         },
 314         loadGame: function() {
 315             // TODO: ask game to remote peer if this.remoteId is set
 316             // (or just if game not found locally)
 317             // NOTE: if it's a corr game, ask it from server
 318             const game = getGameFromStorage(this.gameId);
 319             this.opponent.id = game.oppid; //opponent ID in case of running HH game
 320             this.opponent.name = game.oppname; //maye be blank (if anonymous)
 321             this.score = game.score;
 322             this.mycolor = game.mycolor;
 323             this.fenStart = game.fenStart;
 324             this.moves = game.moves;
 325             this.cursor = game.moves.length-1;
 326             this.lastMove = (game.moves.length > 0 ? game.moves[this.cursor] : null);
 327         },
 328         setEndgameMessage: function(score) {
 329             let eogMessage = "Undefined";
 330             switch (score)
 331             {
 332                 case "1-0":
 333                     eogMessage = translations["White win"];
 334                     break;
 335                 case "0-1":
 336                     eogMessage = translations["Black win"];
 337                     break;
 338                 case "1/2":
 339                     eogMessage = translations["Draw"];
 340                     break;
 341                 case "?":
 342                     eogMessage = "Unfinished";
 343                     break;
 344             }
 345             this.endgameMessage = eogMessage;
 346         },
 347         download: function() {
 348             const content = this.getPgn();
 349             // Prepare and trigger download link
 350             let downloadAnchor = document.getElementById("download");
 351             downloadAnchor.setAttribute("download", "game.pgn");
 352             downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 353             downloadAnchor.click();
 354         },
 355         getPgn: function() {
 356             let pgn = "";
 357             pgn += '[Site "vchess.club"]\n';
 358             const opponent = (this.mode=="human" ? "Anonymous" : "Computer");
 359             pgn += '[Variant "' + variant.name + '"]\n';
 360             pgn += '[Date "' + getDate(new Date()) + '"]\n';
 361             const whiteName = ["human","computer"].includes(this.mode)
 362                 ? (this.mycolor=='w'?'Myself':opponent)
 363                 : "analyze";
 364             const blackName = ["human","computer"].includes(this.mode)
 365                 ? (this.mycolor=='b'?'Myself':opponent)
 366                 : "analyze";
 367             pgn += '[White "' + whiteName + '"]\n';
 368             pgn += '[Black "' + blackName + '"]\n';
 369             pgn += '[Fen "' + this.fenStart + '"]\n';
 370             pgn += '[Result "' + this.score + '"]\n\n';
 371             let counter = 1;
 372             let i = 0;
 373             while (i < this.moves.length)
 374             {
 375                 pgn += (counter++) + ".";
 376                 for (let color of ["w","b"])
 377                 {
 378                     let move = "";
 379                     while (i < this.moves.length && this.moves[i].color == color)
 380                         move += this.moves[i++].notation[0] + ",";
 381                     move = move.slice(0,-1); //remove last comma
 382                     pgn += move + (i < this.moves.length-1 ? " " : "");
 383                 }
 384             }
 385             return pgn + "\n";
 386         },
 387         showScoreMsg: function(score) {
 388             this.setEndgameMessage(score);
 389             let modalBox = document.getElementById("modal-eog");
 390             modalBox.checked = true;
 391             setTimeout(() => { modalBox.checked = false; }, 2000);
 392         },
 393         endGame: function(score) {
 394             this.score = score;
 395             this.showScoreMsg(score);
 396             if (this.mode == "human")
 397                 localStorage["score"] = score;
 398             this.$emit("game-over");
 399         },
 400         oppConnected: function(uid) {
 401             return this.opponents.any(o => o.id == uidi && o.online);
 402         },
 403         playComputerMove: function() {
 404             this.timeStart = Date.now();
 405             this.compWorker.postMessage(["askmove"]);
 406         },
 407         animateMove: function(move) {
 408             let startSquare = document.getElementById(getSquareId(move.start));
 409             let endSquare = document.getElementById(getSquareId(move.end));
 410             let rectStart = startSquare.getBoundingClientRect();
 411             let rectEnd = endSquare.getBoundingClientRect();
 412             let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 413             let movingPiece =
 414                 document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 415             // HACK for animation (with positive translate, image slides "under background")
 416             // Possible improvement: just alter squares on the piece's way...
 417             squares = document.getElementsByClassName("board");
 418             for (let i=0; i<squares.length; i++)
 419             {
 420                 let square = squares.item(i);
 421                 if (square.id != getSquareId(move.start))
 422                     square.style.zIndex = "-1";
 423             }
 424             movingPiece.style.transform = "translate(" + translation.x + "px," +
 425                 translation.y + "px)";
 426             movingPiece.style.transitionDuration = "0.2s";
 427             movingPiece.style.zIndex = "3000";
 428             setTimeout( () => {
 429                 for (let i=0; i<squares.length; i++)
 430                     squares.item(i).style.zIndex = "auto";
 431                 movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 432                 this.play(move);
 433             }, 250);
 434         },
 435         play: function(move, programmatic) {
 436             let navigate = !move;
 437             // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 438             // (except if we receive opponent's move, human or computer)
 439             if (!navigate && this.mode != "analyze" && !programmatic
 440                 && this.cursor < this.moves.length-1)
 441             {
 442                 return;
 443             }
 444             if (navigate)
 445             {
 446                 if (this.cursor == this.moves.length-1)
 447                     return; //no more moves
 448                 move = this.moves[this.cursor+1];
 449             }
 450             if (!!programmatic) //computer or (remote) human opponent
 451             {
 452                 if (this.cursor < this.moves.length-1)
 453                     this.gotoEnd(); //required to play the move
 454                 return this.animateMove(move);
 455             }
 456             // Not programmatic, or animation is over
 457             if (this.mode == "human" && this.subMode == "corr" && this.mycolor == this.vr.turn)
 458             {
 459                 // TODO: show confirm box "validate move ?"
 460             }
 461             if (!move.notation)
 462                 move.notation = this.vr.getNotation(move);
 463             if (!move.color)
 464                 move.color = this.vr.turn;
 465             this.vr.play(move);
 466             this.cursor++;
 467             this.lastMove = move;
 468             if (!move.fen)
 469                 move.fen = this.vr.getFen();
 470             if (this.settings.sound == 2)
 471                 new Audio("/sounds/move.mp3").play().catch(err => {});
 472             if (this.mode == "human")
 473             {
 474                 updateStorage(move); //after our moves and opponent moves
 475                 if (this.vr.turn == this.mycolor)
 476                     this.conn.send(JSON.stringify({code:"newmove", move:move, oppid:this.oppid}));
 477             }
 478             else if (this.mode == "computer")
 479             {
 480                 // Send the move to web worker (including his own moves)
 481                 this.compWorker.postMessage(["newmove",move]);
 482             }
 483             if (!navigate && (this.score == "*" || this.mode == "analyze"))
 484             {
 485                 // Stack move on movesList at current cursor
 486                 if (this.cursor == this.moves.length)
 487                     this.moves.push(move);
 488                 else
 489                     this.moves = this.moves.slice(0,this.cursor-1).concat([move]);
 490             }
 491             // Is opponent in check?
 492             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 493             const score = this.vr.getCurrentScore();
 494             if (score != "*")
 495             {
 496                 if (["human","computer"].includes(this.mode))
 497                     this.endGame(score);
 498                 else //just show score on screen (allow undo)
 499                     this.showScoreMsg(score);
 500             }
 501             // subTurn condition for Marseille (and Avalanche) rules
 502             else if ((this.mode == "computer" && (!this.vr.subTurn || this.vr.subTurn <= 1))
 503                 && (this.subMode == "auto" || this.vr.turn != this.mycolor))
 504             {
 505                 this.playComputerMove();
 506             }
 507             // https://vuejs.org/v2/guide/list.html#Caveats (also for undo)
 508             if (navigate)
 509                 this.$children[0].$forceUpdate(); //TODO!?
 510         },
 511         undo: function(move) {
 512             let navigate = !move;
 513             if (navigate)
 514             {
 515                 if (this.cursor < 0)
 516                     return; //no more moves
 517                 move = this.moves[this.cursor];
 518             }
 519             this.vr.undo(move);
 520             this.cursor--;
 521             this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 522             if (this.settings.sound == 2)
 523                 new Audio("/sounds/undo.mp3").play().catch(err => {});
 524             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 525             if (navigate)
 526                 this.$children[0].$forceUpdate(); //TODO!?
 527             else if (this.mode == "analyze") //TODO: can this happen?
 528                 this.moves.pop();
 529         },
 530         gotoMove: function(index) {
 531             this.vr = new VariantRules(this.moves[index].fen);
 532             this.cursor = index;
 533             this.lastMove = this.moves[index];
 534         },
 535         gotoBegin: function() {
 536             this.vr = new VariantRules(this.fenStart);
 537             this.cursor = -1;
 538             this.lastMove = null;
 539         },
 540         gotoEnd: function() {
 541             this.gotoMove(this.moves.length-1);
 542         },
 543         flip: function() {
 544             this.orientation = V.GetNextCol(this.orientation);
 545         },
 546     },
 547 })