public/javascripts/components/game.js

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