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