client/src/components/BaseGame.vue

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