client/src/components/BaseGame.vue

   1 <template lang="pug">
   2 div#baseGame(tabindex=-1 @click="() => focusBg()" @keydown="handleKeys")
   3   input#modalEog.modal(type="checkbox")
   4   div(role="dialog" aria-labelledby="eogMessage")
   5     .card.smallpad.small-modal.text-center
   6       label.modal-close(for="modalEog")
   7       h3#eogMessage.section {{ endgameMessage }}
   8   #gameContainer
   9     #boardContainer
  10       Board(:vr="vr" :last-move="lastMove" :analyze="game.mode=='analyze'"
  11         :user-color="game.mycolor" :orientation="orientation"
  12         :vname="game.vname" @play-move="play")
  13       #controls
  14         button(@click="gotoBegin") <<
  15         button(@click="() => undo()") <
  16         button(@click="flip") &#8645;
  17         button(@click="() => play()") >
  18         button(@click="gotoEnd") >>
  19       #pgnDiv
  20         a#download(href="#")
  21         button(@click="download") {{ st.tr["Download PGN"] }}
  22         button(v-if="game.mode!='analyze'" @click="analyzePosition")
  23           | {{ st.tr["Analyze"] }}
  24     #movesList
  25       MoveList(v-if="showMoves" :score="game.score" :message="game.scoreMsg"
  26         :firstNum="firstMoveNumber" :moves="moves" :cursor="cursor"
  27         @goto-move="gotoMove")
  28   // TODO: clearer required ?!
  29   .clearer
  30 </template>
  31
  32 <script>
  33 import Board from "@/components/Board.vue";
  34 import MoveList from "@/components/MoveList.vue";
  35 import { store } from "@/store";
  36 import { getSquareId } from "@/utils/squareId";
  37 import { getDate } from "@/utils/datetime";
  38
  39 export default {
  40   name: 'my-base-game',
  41   components: {
  42     Board,
  43     MoveList,
  44   },
  45   // "vr": VariantRules object, describing the game state + rules
  46   props: ["vr","game"],
  47   data: function() {
  48     return {
  49       st: store.state,
  50       // NOTE: all following variables must be reset at the beginning of a game
  51       endgameMessage: "",
  52       orientation: "w",
  53       score: "*", //'*' means 'unfinished'
  54       moves: [],
  55       cursor: -1, //index of the move just played
  56       lastMove: null,
  57       firstMoveNumber: 0, //for printing
  58     };
  59   },
  60   watch: {
  61     // game initial FEN changes when a new game starts
  62     "game.fenStart": function() {
  63       this.re_setVariables();
  64     },
  65     // Received a new move to play:
  66     "game.moveToPlay": function(newMove) {
  67       if (!!newMove) //if stop + launch new game, get undefined move
  68         this.play(newMove, "receive");
  69     },
  70   },
  71   computed: {
  72     showMoves: function() {
  73       return this.game.vname != "Dark" || this.game.mode=="analyze";
  74     },
  75   },
  76   created: function() {
  77     if (!!this.game.fenStart)
  78       this.re_setVariables();
  79   },
  80   mounted: function() {
  81     // Take full width on small screens:
  82     let boardSize = parseInt(localStorage.getItem("boardSize"));
  83     if (!boardSize)
  84     {
  85       boardSize = (window.innerWidth >= 768
  86         ? Math.min(600, 0.5*window.innerWidth) //heuristic...
  87         : window.innerWidth);
  88     }
  89     const movesWidth = (window.innerWidth >= 768 ? 280 : 0);
  90     document.getElementById("boardContainer").style.width = boardSize + "px";
  91     let gameContainer = document.getElementById("gameContainer");
  92     gameContainer.style.width = (boardSize + movesWidth) + "px";
  93   },
  94   methods: {
  95     focusBg: function() {
  96       // TODO: small blue border appears...
  97       document.getElementById("baseGame").focus();
  98     },
  99     handleKeys: function(e) {
 100       if ([32,37,38,39,40].includes(e.keyCode))
 101         e.preventDefault();
 102       switch (e.keyCode)
 103       {
 104         case 37:
 105           this.undo();
 106           break;
 107         case 39:
 108           this.play();
 109           break;
 110         case 38:
 111           this.gotoBegin();
 112           break;
 113         case 40:
 114           this.gotoEnd();
 115           break;
 116         case 32:
 117           this.flip();
 118           break;
 119       }
 120     },
 121     re_setVariables: function() {
 122       this.endgameMessage = "";
 123       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
 124       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
 125       // Post-processing: decorate each move with color + current FEN:
 126       // (to be able to jump to any position quickly)
 127       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
 128       this.firstMoveNumber =
 129         Math.floor(V.ParseFen(this.game.fenStart).movesCount / 2);
 130       this.moves.forEach(move => {
 131         // NOTE: this is doing manually what play() function below achieve,
 132         // but in a lighter "fast-forward" way
 133         move.color = vr_tmp.turn;
 134         move.notation = vr_tmp.getNotation(move);
 135         vr_tmp.play(move);
 136         move.fen = vr_tmp.getFen();
 137       });
 138       if (this.game.fenStart.indexOf(" b ") >= 0 ||
 139         (this.moves.length > 0 && this.moves[0].color == "b"))
 140       {
 141         // 'end' is required for Board component to check lastMove for e.p.
 142         this.moves.unshift({color: "w", notation: "...", end: {x:-1,y:-1}});
 143       }
 144       const L = this.moves.length;
 145       this.cursor = L-1;
 146       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 147     },
 148     analyzePosition: function() {
 149       const newUrl = "/analyze/" + this.game.vname +
 150         "/?fen=" + this.vr.getFen().replace(/ /g, "_");
 151       //window.open("#" + newUrl); //to open in a new tab
 152       this.$router.push(newUrl); //better
 153     },
 154     download: function() {
 155       const content = this.getPgn();
 156       // Prepare and trigger download link
 157       let downloadAnchor = document.getElementById("download");
 158       downloadAnchor.setAttribute("download", "game.pgn");
 159       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 160       downloadAnchor.click();
 161     },
 162     getPgn: function() {
 163       let pgn = "";
 164       pgn += '[Site "vchess.club"]\n';
 165       pgn += '[Variant "' + this.game.vname + '"]\n';
 166       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 167       pgn += '[White "' + this.game.players[0].name + '"]\n';
 168       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 169       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 170       pgn += '[Result "' + this.game.score + '"]\n\n';
 171       let counter = 1;
 172       let i = 0;
 173       while (i < this.moves.length)
 174       {
 175         pgn += (counter++) + ".";
 176         for (let color of ["w","b"])
 177         {
 178           let move = "";
 179           while (i < this.moves.length && this.moves[i].color == color)
 180             move += this.moves[i++].notation + ",";
 181           move = move.slice(0,-1); //remove last comma
 182           pgn += move + (i < this.moves.length ? " " : "");
 183         }
 184       }
 185       return pgn + "\n";
 186     },
 187     getScoreMessage: function(score) {
 188       let eogMessage = "Undefined";
 189       switch (score)
 190       {
 191         case "1-0":
 192           eogMessage = this.st.tr["White win"];
 193           break;
 194         case "0-1":
 195           eogMessage = this.st.tr["Black win"];
 196           break;
 197         case "1/2":
 198           eogMessage = this.st.tr["Draw"];
 199           break;
 200         case "?":
 201           eogMessage = this.st.tr["Unfinished"];
 202           break;
 203       }
 204       return eogMessage;
 205     },
 206     showEndgameMsg: function(message) {
 207       this.endgameMessage = message;
 208       let modalBox = document.getElementById("modalEog");
 209       modalBox.checked = true;
 210       setTimeout(() => { modalBox.checked = false; }, 2000);
 211     },
 212     animateMove: function(move, callback) {
 213       let startSquare = document.getElementById(getSquareId(move.start));
 214       let endSquare = document.getElementById(getSquareId(move.end));
 215       let rectStart = startSquare.getBoundingClientRect();
 216       let rectEnd = endSquare.getBoundingClientRect();
 217       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 218       let movingPiece =
 219         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 220       // HACK for animation (with positive translate, image slides "under background")
 221       // Possible improvement: just alter squares on the piece's way...
 222       const squares = document.getElementsByClassName("board");
 223       for (let i=0; i<squares.length; i++)
 224       {
 225         let square = squares.item(i);
 226         if (square.id != getSquareId(move.start))
 227           square.style.zIndex = "-1";
 228       }
 229       movingPiece.style.transform = "translate(" + translation.x + "px," +
 230         translation.y + "px)";
 231       movingPiece.style.transitionDuration = "0.2s";
 232       movingPiece.style.zIndex = "3000";
 233       setTimeout( () => {
 234         for (let i=0; i<squares.length; i++)
 235           squares.item(i).style.zIndex = "auto";
 236         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 237         callback();
 238       }, 250);
 239     },
 240     play: function(move, receive) {
 241       // NOTE: navigate and receive are mutually exclusive
 242       const navigate = !move;
 243       // Forbid playing outside analyze mode, except if move is received.
 244       // Sufficient condition because Board already knows which turn it is.
 245       if (!navigate && this.game.mode!="analyze" && !receive
 246         && this.cursor < this.moves.length-1)
 247       {
 248         return;
 249       }
 250       const doPlayMove = () => {
 251         if (!!receive && this.cursor < this.moves.length-1)
 252           this.gotoEnd(); //required to play the move
 253         if (navigate)
 254         {
 255           if (this.cursor == this.moves.length-1)
 256             return; //no more moves
 257           move = this.moves[this.cursor+1];
 258         }
 259         else
 260         {
 261           move.color = this.vr.turn;
 262           move.notation = this.vr.getNotation(move);
 263         }
 264         this.vr.play(move);
 265         this.cursor++;
 266         this.lastMove = move;
 267         if (this.st.settings.sound == 2)
 268           new Audio("/sounds/move.mp3").play().catch(err => {});
 269         if (!navigate)
 270         {
 271           move.fen = this.vr.getFen();
 272           // Stack move on movesList at current cursor
 273           if (this.cursor == this.moves.length)
 274             this.moves.push(move);
 275           else
 276             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 277         }
 278         if (!navigate && this.game.mode != "analyze")
 279           this.$emit("newmove", move); //post-processing (e.g. computer play)
 280         // Is opponent in check?
 281         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 282         const score = this.vr.getCurrentScore();
 283         if (score != "*")
 284         {
 285           const message = this.getScoreMessage(score);
 286           if (this.game.mode != "analyze")
 287             this.$emit("gameover", score, message);
 288           else //just show score on screen (allow undo)
 289             this.showEndgameMsg(score + " . " + message);
 290         }
 291       };
 292       if (!!receive && this.game.vname != "Dark")
 293         this.animateMove(move, doPlayMove);
 294       else
 295         doPlayMove();
 296     },
 297     undo: function(move) {
 298       const navigate = !move;
 299       if (navigate)
 300       {
 301         if (this.cursor < 0)
 302           return; //no more moves
 303         move = this.moves[this.cursor];
 304       }
 305       this.vr.undo(move);
 306       this.cursor--;
 307       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 308       if (this.st.settings.sound == 2)
 309         new Audio("/sounds/undo.mp3").play().catch(err => {});
 310       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 311       if (!navigate)
 312         this.moves.pop();
 313     },
 314     gotoMove: function(index) {
 315       this.vr.re_init(this.moves[index].fen);
 316       this.cursor = index;
 317       this.lastMove = this.moves[index];
 318     },
 319     gotoBegin: function() {
 320       if (this.cursor == -1)
 321         return;
 322       this.vr.re_init(this.game.fenStart);
 323       if (this.moves.length > 0 && this.moves[0].notation == "...")
 324       {
 325         this.cursor = 0;
 326         this.lastMove = this.moves[0];
 327       }
 328       else
 329       {
 330         this.cursor = -1;
 331         this.lastMove = null;
 332       }
 333     },
 334     gotoEnd: function() {
 335       if (this.cursor == this.moves.length - 1)
 336         return;
 337       this.gotoMove(this.moves.length-1);
 338     },
 339     flip: function() {
 340       this.orientation = V.GetNextCol(this.orientation);
 341     },
 342   },
 343 };
 344 </script>
 345
 346 <style lang="sass">
 347 #baseGame
 348   width: 100%
 349
 350 #gameContainer
 351   margin-left: auto
 352   margin-right: auto
 353
 354 #modal-eog+div .card
 355   overflow: hidden
 356 @media screen and (min-width: 768px)
 357   #controls
 358     width: 400px
 359     margin-left: auto
 360     margin-right: auto
 361 #controls
 362   margin-top: 10px
 363   margin-left: auto
 364   margin-right: auto
 365   button
 366     display: inline-block
 367     width: 20%
 368     margin: 0
 369 #pgnDiv
 370   text-align: center
 371   margin-left: auto
 372   margin-right: auto
 373 #boardContainer
 374   float: left
 375 #movesList
 376   width: 280px
 377   float: left
 378 @media screen and (max-width: 767px)
 379   #movesList
 380     width: 100%
 381     float: none
 382     clear: both
 383     table
 384       tr
 385         display: flex
 386         margin: 0
 387         padding: 0
 388         td
 389           text-align: left
 390 .clearer
 391   clear: both
 392 </style>