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
  95
  96
  97
  98     // TODO: something here........... gameContainer.width increases if from small to larger screen
  99     window.onResize = (e) => {
 100       console.log(e);
 101       //if (window.innerWidth >= 768)
 102     };
 103
 104
 105
 106
 107   },
 108   methods: {
 109     focusBg: function() {
 110       // TODO: small blue border appears...
 111       document.getElementById("baseGame").focus();
 112     },
 113     handleKeys: function(e) {
 114       if ([32,37,38,39,40].includes(e.keyCode))
 115         e.preventDefault();
 116       switch (e.keyCode)
 117       {
 118         case 37:
 119           this.undo();
 120           break;
 121         case 39:
 122           this.play();
 123           break;
 124         case 38:
 125           this.gotoBegin();
 126           break;
 127         case 40:
 128           this.gotoEnd();
 129           break;
 130         case 32:
 131           this.flip();
 132           break;
 133       }
 134     },
 135     re_setVariables: function() {
 136       this.endgameMessage = "";
 137       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
 138       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
 139       // Post-processing: decorate each move with color + current FEN:
 140       // (to be able to jump to any position quickly)
 141       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
 142       this.firstMoveNumber =
 143         Math.floor(V.ParseFen(this.game.fenStart).movesCount / 2);
 144       this.moves.forEach(move => {
 145         // NOTE: this is doing manually what play() function below achieve,
 146         // but in a lighter "fast-forward" way
 147         move.color = vr_tmp.turn;
 148         move.notation = vr_tmp.getNotation(move);
 149         vr_tmp.play(move);
 150         move.fen = vr_tmp.getFen();
 151       });
 152       if (this.game.fenStart.indexOf(" b ") >= 0 ||
 153         (this.moves.length > 0 && this.moves[0].color == "b"))
 154       {
 155         // 'end' is required for Board component to check lastMove for e.p.
 156         this.moves.unshift({color: "w", notation: "...", end: {x:-1,y:-1}});
 157       }
 158       const L = this.moves.length;
 159       this.cursor = L-1;
 160       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 161     },
 162     analyzePosition: function() {
 163       const newUrl = "/analyze/" + this.game.vname +
 164         "/?fen=" + this.vr.getFen().replace(/ /g, "_");
 165       //window.open("#" + newUrl); //to open in a new tab
 166       this.$router.push(newUrl); //better
 167     },
 168     download: function() {
 169       const content = this.getPgn();
 170       // Prepare and trigger download link
 171       let downloadAnchor = document.getElementById("download");
 172       downloadAnchor.setAttribute("download", "game.pgn");
 173       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 174       downloadAnchor.click();
 175     },
 176     getPgn: function() {
 177       let pgn = "";
 178       pgn += '[Site "vchess.club"]\n';
 179       pgn += '[Variant "' + this.game.vname + '"]\n';
 180       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 181       pgn += '[White "' + this.game.players[0].name + '"]\n';
 182       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 183       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 184       pgn += '[Result "' + this.game.score + '"]\n\n';
 185       let counter = 1;
 186       let i = 0;
 187       while (i < this.moves.length)
 188       {
 189         pgn += (counter++) + ".";
 190         for (let color of ["w","b"])
 191         {
 192           let move = "";
 193           while (i < this.moves.length && this.moves[i].color == color)
 194             move += this.moves[i++].notation + ",";
 195           move = move.slice(0,-1); //remove last comma
 196           pgn += move + (i < this.moves.length ? " " : "");
 197         }
 198       }
 199       return pgn + "\n";
 200     },
 201     getScoreMessage: function(score) {
 202       let eogMessage = "Undefined";
 203       switch (score)
 204       {
 205         case "1-0":
 206           eogMessage = this.st.tr["White win"];
 207           break;
 208         case "0-1":
 209           eogMessage = this.st.tr["Black win"];
 210           break;
 211         case "1/2":
 212           eogMessage = this.st.tr["Draw"];
 213           break;
 214         case "?":
 215           eogMessage = this.st.tr["Unfinished"];
 216           break;
 217       }
 218       return eogMessage;
 219     },
 220     showEndgameMsg: function(message) {
 221       this.endgameMessage = message;
 222       let modalBox = document.getElementById("modalEog");
 223       modalBox.checked = true;
 224       setTimeout(() => { modalBox.checked = false; }, 2000);
 225     },
 226     animateMove: function(move, callback) {
 227       let startSquare = document.getElementById(getSquareId(move.start));
 228       let endSquare = document.getElementById(getSquareId(move.end));
 229       let rectStart = startSquare.getBoundingClientRect();
 230       let rectEnd = endSquare.getBoundingClientRect();
 231       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 232       let movingPiece =
 233         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 234       // HACK for animation (with positive translate, image slides "under background")
 235       // Possible improvement: just alter squares on the piece's way...
 236       const squares = document.getElementsByClassName("board");
 237       for (let i=0; i<squares.length; i++)
 238       {
 239         let square = squares.item(i);
 240         if (square.id != getSquareId(move.start))
 241           square.style.zIndex = "-1";
 242       }
 243       movingPiece.style.transform = "translate(" + translation.x + "px," +
 244         translation.y + "px)";
 245       movingPiece.style.transitionDuration = "0.2s";
 246       movingPiece.style.zIndex = "3000";
 247       setTimeout( () => {
 248         for (let i=0; i<squares.length; i++)
 249           squares.item(i).style.zIndex = "auto";
 250         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 251         callback();
 252       }, 250);
 253     },
 254     play: function(move, receive) {
 255       // NOTE: navigate and receive are mutually exclusive
 256       const navigate = !move;
 257       // Forbid playing outside analyze mode, except if move is received.
 258       // Sufficient condition because Board already knows which turn it is.
 259       if (!navigate && this.game.mode!="analyze" && !receive
 260         && this.cursor < this.moves.length-1)
 261       {
 262         return;
 263       }
 264       const doPlayMove = () => {
 265         if (!!receive && this.cursor < this.moves.length-1)
 266           this.gotoEnd(); //required to play the move
 267         if (navigate)
 268         {
 269           if (this.cursor == this.moves.length-1)
 270             return; //no more moves
 271           move = this.moves[this.cursor+1];
 272         }
 273         else
 274         {
 275           move.color = this.vr.turn;
 276           move.notation = this.vr.getNotation(move);
 277         }
 278         this.vr.play(move);
 279         this.cursor++;
 280         this.lastMove = move;
 281         if (this.st.settings.sound == 2)
 282           new Audio("/sounds/move.mp3").play().catch(err => {});
 283         if (!navigate)
 284         {
 285           move.fen = this.vr.getFen();
 286           // Stack move on movesList at current cursor
 287           if (this.cursor == this.moves.length)
 288             this.moves.push(move);
 289           else
 290             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 291         }
 292         if (!navigate && this.game.mode != "analyze")
 293           this.$emit("newmove", move); //post-processing (e.g. computer play)
 294         // Is opponent in check?
 295         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 296         const score = this.vr.getCurrentScore();
 297         if (score != "*")
 298         {
 299           const message = this.getScoreMessage(score);
 300           if (this.game.mode != "analyze")
 301             this.$emit("gameover", score, message);
 302           else //just show score on screen (allow undo)
 303             this.showEndgameMsg(score + " . " + message);
 304         }
 305       };
 306       if (!!receive && this.game.vname != "Dark")
 307         this.animateMove(move, doPlayMove);
 308       else
 309         doPlayMove();
 310     },
 311     undo: function(move) {
 312       const navigate = !move;
 313       if (navigate)
 314       {
 315         if (this.cursor < 0)
 316           return; //no more moves
 317         move = this.moves[this.cursor];
 318       }
 319       this.vr.undo(move);
 320       this.cursor--;
 321       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 322       if (this.st.settings.sound == 2)
 323         new Audio("/sounds/undo.mp3").play().catch(err => {});
 324       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 325       if (!navigate)
 326         this.moves.pop();
 327     },
 328     gotoMove: function(index) {
 329       this.vr.re_init(this.moves[index].fen);
 330       this.cursor = index;
 331       this.lastMove = this.moves[index];
 332     },
 333     gotoBegin: function() {
 334       if (this.cursor == -1)
 335         return;
 336       this.vr.re_init(this.game.fenStart);
 337       if (this.moves.length > 0 && this.moves[0].notation == "...")
 338       {
 339         this.cursor = 0;
 340         this.lastMove = this.moves[0];
 341       }
 342       else
 343       {
 344         this.cursor = -1;
 345         this.lastMove = null;
 346       }
 347     },
 348     gotoEnd: function() {
 349       if (this.cursor == this.moves.length - 1)
 350         return;
 351       this.gotoMove(this.moves.length-1);
 352     },
 353     flip: function() {
 354       this.orientation = V.GetNextCol(this.orientation);
 355     },
 356   },
 357 };
 358 </script>
 359
 360 <style lang="sass">
 361 #baseGame
 362   width: 100%
 363
 364 #gameContainer
 365   margin-left: auto
 366   margin-right: auto
 367
 368 #modal-eog+div .card
 369   overflow: hidden
 370 @media screen and (min-width: 768px)
 371   #controls
 372     width: 400px
 373     margin-left: auto
 374     margin-right: auto
 375 #controls
 376   margin-top: 10px
 377   margin-left: auto
 378   margin-right: auto
 379   button
 380     display: inline-block
 381     width: 20%
 382     margin: 0
 383 #pgnDiv
 384   text-align: center
 385   margin-left: auto
 386   margin-right: auto
 387 #boardContainer
 388   float: left
 389 #movesList
 390   width: 280px
 391   float: left
 392 @media screen and (max-width: 767px)
 393   #movesList
 394     width: 100%
 395     float: none
 396     clear: both
 397     table
 398       tr
 399         display: flex
 400         margin: 0
 401         padding: 0
 402         td
 403           text-align: left
 404 .clearer
 405   clear: both
 406 </style>