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() {
  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();
  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: if I'm one of the players in game, then:
 132         // Send ping to server (answer pong if opponent is connected)
 133         if (true && !!this.conn)
 134         {
 135             this.conn.onopen = () => {
 136                 this.conn.send(JSON.stringify({
 137                     code:"ping",oppid:this.oppid,gameId:this.gameId}));
 138             };
 139         }
 140         // TODO: also handle "draw accepted" (use opponents array?)
 141         // --> must give this info also when sending lastState...
 142         // and, if all players agree then OK draw (end game ...etc)
 143         const socketMessageListener = msg => {
 144             const data = JSON.parse(msg.data);
 145             let L = undefined;
 146             switch (data.code)
 147             {
 148                 case "newmove": //..he played!
 149                     this.play(data.move, variant.name!="Dark" ? "animate" : null);
 150                     break;
 151                 case "pong": //received if we sent a ping (game still alive on our side)
 152                     if (this.gameId != data.gameId)
 153                         break; //games IDs don't match: definitely over...
 154                     this.oppConnected = true;
 155                     // Send our "last state" informations to opponent(s)
 156                     L = this.vr.moves.length;
 157                     Object.keys(this.opponents).forEach(oid => {
 158                         this.conn.send(JSON.stringify({
 159                             code: "lastate",
 160                             oppid: oid,
 161                             gameId: this.gameId,
 162                             lastMove: (L>0?this.vr.moves[L-1]:undefined),
 163                             movesCount: L,
 164                         }));
 165                     });
 166                     break;
 167                 // TODO: refactor this, because at 3 or 4 players we may have missed 2 or 3 moves (not just one)
 168                 case "lastate": //got opponent infos about last move
 169                     L = this.vr.moves.length;
 170                     if (this.gameId != data.gameId)
 171                         break; //games IDs don't match: nothing we can do...
 172                     // OK, opponent still in game (which might be over)
 173                     if (this.score != "*")
 174                     {
 175                         // We finished the game (any result possible)
 176                         this.conn.send(JSON.stringify({
 177                             code: "lastate",
 178                             oppid: data.oppid,
 179                             gameId: this.gameId,
 180                             score: this.score,
 181                         }));
 182                     }
 183                     else if (!!data.score) //opponent finished the game
 184                         this.endGame(data.score);
 185                     else if (data.movesCount < L)
 186                     {
 187                         // We must tell last move to opponent
 188                         this.conn.send(JSON.stringify({
 189                             code: "lastate",
 190                             oppid: this.opponent.id,
 191                             gameId: this.gameId,
 192                             lastMove: this.vr.moves[L-1],
 193                             movesCount: L,
 194                         }));
 195                     }
 196                     else if (data.movesCount > L) //just got last move from him
 197                         this.play(data.lastMove, "animate");
 198                     break;
 199                 case "resign": //..you won!
 200                     this.endGame(this.mycolor=="w"?"1-0":"0-1");
 201                     break;
 202                 // TODO: also use (dis)connect info to count online players?
 203                 case "connect":
 204                 case "disconnect":
 205                     if (this.mode=="human")
 206                     {
 207                         const online = (data.code == "connect");
 208                         // If this is an opponent ?
 209                         if (!!this.opponents[data.id])
 210                             this.opponents[data.id].online = online;
 211                         else
 212                         {
 213                             // Or an observer ?
 214                             if (!online)
 215                                 delete this.people[data.id];
 216                             else
 217                                 this.people[data.id] = data.name;
 218                         }
 219                     }
 220                     break;
 221             }
 222         };
 223         const socketCloseListener = () => {
 224             this.conn.addEventListener('message', socketMessageListener);
 225             this.conn.addEventListener('close', socketCloseListener);
 226         };
 227         if (!!this.conn)
 228         {
 229             this.conn.onmessage = socketMessageListener;
 230             this.conn.onclose = socketCloseListener;
 231         }
 232         // Computer moves web worker logic: (TODO: also for observers in HH games ?)
 233         this.compWorker.postMessage(["scripts",variant.name]);
 234         this.compWorker.onmessage = e => {
 235             this.lockCompThink = true; //to avoid some ghost moves
 236             let compMove = e.data;
 237             if (!Array.isArray(compMove))
 238                 compMove = [compMove]; //to deal with MarseilleRules
 239             // Small delay for the bot to appear "more human"
 240             const delay = Math.max(500-(Date.now()-this.timeStart), 0);
 241             setTimeout(() => {
 242                 const animate = variant.name != "Dark";
 243                 this.play(compMove[0], animate);
 244                 if (compMove.length == 2)
 245                     setTimeout( () => { this.play(compMove[1], animate); }, 750);
 246                 else //250 == length of animation (TODO: should be a constant somewhere)
 247                     setTimeout( () => this.lockCompThink = false, 250);
 248             }, delay);
 249         }
 250     },
 251     // dans variant.js (plutôt room.js) conn gère aussi les challenges
 252     // et les chats dans chat.js. Puis en webRTC, repenser tout ça.
 253     methods: {
 254         offerDraw: function() {
 255             if (!confirm("Offer draw?"))
 256                 return;
 257             // Stay in "draw offer sent" state until next move is played
 258             this.drawOfferSent = true;
 259             if (this.subMode == "corr")
 260             {
 261                 // TODO: set drawOffer on in game (how ?)
 262             }
 263             else //live game
 264             {
 265                 this.opponents.forEach(o => {
 266                     if (!!o.online)
 267                     {
 268                         try {
 269                             this.conn.send(JSON.stringify({code: "draw", oppid: o.id}));
 270                         } catch (INVALID_STATE_ERR) {
 271                             return;
 272                         }
 273                     }
 274                 });
 275             }
 276         },
 277         // + conn handling: "draw" message ==> agree for draw (if we have "drawOffered" at true)
 278         receiveDrawOffer: function() {
 279             //if (...)
 280             // TODO: ignore if preventDrawOffer is set; otherwise show modal box with option "prevent future offers"
 281             // if accept: send message "draw"
 282         },
 283         abortGame: function() {
 284             if (!confirm("Abort the game?"))
 285                 return;
 286             //+ bouton "abort" avec score == "?" + demander confirmation pour toutes ces actions,
 287             //send message: "gameOver" avec score "?"
 288         },
 289         resign: function(e) {
 290             if (!confirm("Resign the game?"))
 291                 return;
 292             if (this.mode == "human" && this.oppConnected(this.oppid))
 293             {
 294                 try {
 295                     this.conn.send(JSON.stringify({code: "resign", oppid: this.oppid}));
 296                 } catch (INVALID_STATE_ERR) {
 297                     return;
 298                 }
 299             }
 300             this.endGame(this.mycolor=="w"?"0-1":"1-0");
 301         },
 302         translate: translate,
 303         newGameFromFen: function() {
 304             this.vr = new VariantRules(this.fen);
 305             this.moves = [];
 306             this.cursor = -1;
 307             this.fenStart = this.fen;
 308             this.score = "*";
 309             if (this.mode == "analyze")
 310             {
 311                 this.mycolor = V.ParseFen(this.fen).turn;
 312                 this.orientation = this.mycolor;
 313             }
 314             else if (this.mode == "computer") //only other alternative (HH with gameId)
 315             {
 316                 this.mycolor = (Math.random() < 0.5 ? "w" : "b");
 317                 this.orientation = this.mycolor;
 318                 this.compWorker.postMessage(["init",this.fen]);
 319                 if (this.mycolor != "w" || this.subMode == "auto")
 320                     this.playComputerMove();
 321             }
 322         },
 323         loadGame: function() {
 324             // TODO: ask game to remote peer if this.remoteId is set
 325             // (or just if game not found locally)
 326             // NOTE: if it's a corr game, ask it from server
 327             const game = getGameFromStorage(this.gameId);
 328             this.opponent.id = game.oppid; //opponent ID in case of running HH game
 329             this.opponent.name = game.oppname; //maye be blank (if anonymous)
 330             this.score = game.score;
 331             this.mycolor = game.mycolor;
 332             this.fenStart = game.fenStart;
 333             this.moves = game.moves;
 334             this.cursor = game.moves.length-1;
 335             this.lastMove = (game.moves.length > 0 ? game.moves[this.cursor] : null);
 336         },
 337         setEndgameMessage: function(score) {
 338             let eogMessage = "Undefined";
 339             switch (score)
 340             {
 341                 case "1-0":
 342                     eogMessage = translations["White win"];
 343                     break;
 344                 case "0-1":
 345                     eogMessage = translations["Black win"];
 346                     break;
 347                 case "1/2":
 348                     eogMessage = translations["Draw"];
 349                     break;
 350                 case "?":
 351                     eogMessage = "Unfinished";
 352                     break;
 353             }
 354             this.endgameMessage = eogMessage;
 355         },
 356         download: function() {
 357             const content = this.getPgn();
 358             // Prepare and trigger download link
 359             let downloadAnchor = document.getElementById("download");
 360             downloadAnchor.setAttribute("download", "game.pgn");
 361             downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 362             downloadAnchor.click();
 363         },
 364         getPgn: function() {
 365             let pgn = "";
 366             pgn += '[Site "vchess.club"]\n';
 367             const opponent = (this.mode=="human" ? "Anonymous" : "Computer");
 368             pgn += '[Variant "' + variant.name + '"]\n';
 369             pgn += '[Date "' + getDate(new Date()) + '"]\n';
 370             const whiteName = ["human","computer"].includes(this.mode)
 371                 ? (this.mycolor=='w'?'Myself':opponent)
 372                 : "analyze";
 373             const blackName = ["human","computer"].includes(this.mode)
 374                 ? (this.mycolor=='b'?'Myself':opponent)
 375                 : "analyze";
 376             pgn += '[White "' + whiteName + '"]\n';
 377             pgn += '[Black "' + blackName + '"]\n';
 378             pgn += '[Fen "' + this.fenStart + '"]\n';
 379             pgn += '[Result "' + this.score + '"]\n\n';
 380             let counter = 1;
 381             let i = 0;
 382             while (i < this.moves.length)
 383             {
 384                 pgn += (counter++) + ".";
 385                 for (let color of ["w","b"])
 386                 {
 387                     let move = "";
 388                     while (i < this.moves.length && this.moves[i].color == color)
 389                         move += this.moves[i++].notation[0] + ",";
 390                     move = move.slice(0,-1); //remove last comma
 391                     pgn += move + (i < this.moves.length-1 ? " " : "");
 392                 }
 393             }
 394             return pgn + "\n";
 395         },
 396         showScoreMsg: function(score) {
 397             this.setEndgameMessage(score);
 398             let modalBox = document.getElementById("modal-eog");
 399             modalBox.checked = true;
 400             setTimeout(() => { modalBox.checked = false; }, 2000);
 401         },
 402         endGame: function(score) {
 403             this.score = score;
 404             this.showScoreMsg(score);
 405             if (this.mode == "human")
 406                 localStorage["score"] = score;
 407             this.$emit("game-over");
 408         },
 409         oppConnected: function(uid) {
 410             return this.opponents.any(o => o.id == uidi && o.online);
 411         },
 412         playComputerMove: function() {
 413             this.timeStart = Date.now();
 414             this.compWorker.postMessage(["askmove"]);
 415         },
 416         animateMove: function(move) {
 417             let startSquare = document.getElementById(getSquareId(move.start));
 418             let endSquare = document.getElementById(getSquareId(move.end));
 419             let rectStart = startSquare.getBoundingClientRect();
 420             let rectEnd = endSquare.getBoundingClientRect();
 421             let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 422             let movingPiece =
 423                 document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 424             // HACK for animation (with positive translate, image slides "under background")
 425             // Possible improvement: just alter squares on the piece's way...
 426             squares = document.getElementsByClassName("board");
 427             for (let i=0; i<squares.length; i++)
 428             {
 429                 let square = squares.item(i);
 430                 if (square.id != getSquareId(move.start))
 431                     square.style.zIndex = "-1";
 432             }
 433             movingPiece.style.transform = "translate(" + translation.x + "px," +
 434                 translation.y + "px)";
 435             movingPiece.style.transitionDuration = "0.2s";
 436             movingPiece.style.zIndex = "3000";
 437             setTimeout( () => {
 438                 for (let i=0; i<squares.length; i++)
 439                     squares.item(i).style.zIndex = "auto";
 440                 movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 441                 this.play(move);
 442             }, 250);
 443         },
 444         play: function(move, programmatic) {
 445             let navigate = !move;
 446             // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 447             // (except if we receive opponent's move, human or computer)
 448             if (!navigate && this.mode != "analyze" && !programmatic
 449                 && this.cursor < this.moves.length-1)
 450             {
 451                 return;
 452             }
 453             if (navigate)
 454             {
 455                 if (this.cursor == this.moves.length-1)
 456                     return; //no more moves
 457                 move = this.moves[this.cursor+1];
 458             }
 459             if (!!programmatic) //computer or (remote) human opponent
 460             {
 461                 if (this.cursor < this.moves.length-1)
 462                     this.gotoEnd(); //required to play the move
 463                 return this.animateMove(move);
 464             }
 465             // Not programmatic, or animation is over
 466             if (this.mode == "human" && this.subMode == "corr" && this.mycolor == this.vr.turn)
 467             {
 468                 // TODO: show confirm box "validate move ?"
 469             }
 470             if (!move.notation)
 471                 move.notation = this.vr.getNotation(move);
 472             if (!move.color)
 473                 move.color = this.vr.turn;
 474             this.vr.play(move);
 475             this.cursor++;
 476             this.lastMove = move;
 477             if (!move.fen)
 478                 move.fen = this.vr.getFen();
 479             if (this.settings.sound == 2)
 480                 new Audio("/sounds/move.mp3").play().catch(err => {});
 481             if (this.mode == "human")
 482             {
 483                 updateStorage(move); //after our moves and opponent moves
 484                 if (this.vr.turn == this.mycolor)
 485                     this.conn.send(JSON.stringify({code:"newmove", move:move, oppid:this.oppid}));
 486             }
 487             else if (this.mode == "computer")
 488             {
 489                 // Send the move to web worker (including his own moves)
 490                 this.compWorker.postMessage(["newmove",move]);
 491             }
 492             if (!navigate && (this.score == "*" || this.mode == "analyze"))
 493             {
 494                 // Stack move on movesList at current cursor
 495                 if (this.cursor == this.moves.length)
 496                     this.moves.push(move);
 497                 else
 498                     this.moves = this.moves.slice(0,this.cursor-1).concat([move]);
 499             }
 500             // Is opponent in check?
 501             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 502             const score = this.vr.getCurrentScore();
 503             if (score != "*")
 504             {
 505                 if (["human","computer"].includes(this.mode))
 506                     this.endGame(score);
 507                 else //just show score on screen (allow undo)
 508                     this.showScoreMsg(score);
 509             }
 510             // subTurn condition for Marseille (and Avalanche) rules
 511             else if ((this.mode == "computer" && (!this.vr.subTurn || this.vr.subTurn <= 1))
 512                 && (this.subMode == "auto" || this.vr.turn != this.mycolor))
 513             {
 514                 this.playComputerMove();
 515             }
 516             // https://vuejs.org/v2/guide/list.html#Caveats (also for undo)
 517             if (navigate)
 518                 this.$children[0].$forceUpdate(); //TODO!?
 519         },
 520         undo: function(move) {
 521             let navigate = !move;
 522             if (navigate)
 523             {
 524                 if (this.cursor < 0)
 525                     return; //no more moves
 526                 move = this.moves[this.cursor];
 527             }
 528             this.vr.undo(move);
 529             this.cursor--;
 530             this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 531             if (this.settings.sound == 2)
 532                 new Audio("/sounds/undo.mp3").play().catch(err => {});
 533             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 534             if (navigate)
 535                 this.$children[0].$forceUpdate(); //TODO!?
 536             else if (this.mode == "analyze") //TODO: can this happen?
 537                 this.moves.pop();
 538         },
 539         gotoMove: function(index) {
 540             this.vr = new VariantRules(this.moves[index].fen);
 541             this.cursor = index;
 542             this.lastMove = this.moves[index];
 543         },
 544         gotoBegin: function() {
 545             this.vr = new VariantRules(this.fenStart);
 546             this.cursor = -1;
 547             this.lastMove = null;
 548         },
 549         gotoEnd: function() {
 550             this.gotoMove(this.moves.length-1);
 551         },
 552         flip: function() {
 553             this.orientation = V.GetNextCol(this.orientation);
 554         },
 555     },
 556 })