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