client/src/components/BaseGame.vue

   1 <template lang="pug">
   2 div#baseGame(
   3   tabindex=-1
   4   @click="focusBg()"
   5   @keydown="handleKeys($event)"
   6   @wheel="handleScroll($event)"
   7 )
   8   input#modalEog.modal(type="checkbox")
   9   div#eogDiv(
  10     role="dialog"
  11     data-checkbox="modalEog"
  12   )
  13     .card.text-center
  14       label.modal-close(for="modalEog")
  15       h3.section {{ endgameMessage }}
  16   input#modalAdjust.modal(type="checkbox")
  17   div#adjuster(
  18     role="dialog"
  19     data-checkbox="modalAdjust"
  20   )
  21     .card.text-center
  22       label.modal-close(for="modalAdjust")
  23       label(for="boardSize") {{ st.tr["Board size"] }}
  24       input#boardSize.slider(
  25         type="range"
  26         min="0"
  27         max="100"
  28         value="50"
  29         @input="adjustBoard()"
  30       )
  31   #gameContainer
  32     #boardContainer
  33       Board(
  34         :vr="vr"
  35         :last-move="lastMove"
  36         :analyze="game.mode=='analyze'"
  37         :score="game.score"
  38         :user-color="game.mycolor"
  39         :orientation="orientation"
  40         :vname="game.vname"
  41         :incheck="incheck"
  42         @play-move="play"
  43       )
  44       #turnIndicator(v-if="showTurn") {{ turn }}
  45       #controls
  46         button(@click="gotoBegin()") <<
  47         button(@click="undo()") <
  48         button(v-if="canFlip" @click="flip()") &#8645;
  49         button(@click="play()") >
  50         button(@click="gotoEnd()") >>
  51       #belowControls
  52         #downloadDiv(v-if="allowDownloadPGN")
  53           a#download(href="#")
  54           button(@click="download()") {{ st.tr["Download"] }} PGN
  55         button(onClick="window.doClick('modalAdjust')") &#10530;
  56         button(
  57           v-if="canAnalyze"
  58           @click="analyzePosition()"
  59         )
  60           | {{ st.tr["Analyse"] }}
  61         // NOTE: variants pages already have a "Rules" link on top
  62         button(
  63           v-if="!$route.path.match('/variants/')"
  64           @click="showRules()"
  65         )
  66           | {{ st.tr["Rules"] }}
  67     #movesList
  68       MoveList(
  69         v-if="showMoves != 'none'"
  70         :show="showMoves"
  71         :score="game.score"
  72         :message="game.scoreMsg"
  73         :firstNum="firstMoveNumber"
  74         :moves="moves"
  75         :cursor="cursor"
  76         @goto-move="gotoMove"
  77       )
  78     .clearer
  79 </template>
  80
  81 <script>
  82 import Board from "@/components/Board.vue";
  83 import MoveList from "@/components/MoveList.vue";
  84 import { store } from "@/store";
  85 import { getSquareId } from "@/utils/squareId";
  86 import { getDate } from "@/utils/datetime";
  87 import { processModalClick } from "@/utils/modalClick";
  88 import { getScoreMessage } from "@/utils/scoring";
  89 export default {
  90   name: "my-base-game",
  91   components: {
  92     Board,
  93     MoveList
  94   },
  95   // "vr": VariantRules object, describing the game state + rules
  96   props: ["vr", "game"],
  97   data: function() {
  98     return {
  99       st: store.state,
 100       // NOTE: all following variables must be reset at the beginning of a game
 101       endgameMessage: "",
 102       orientation: "w",
 103       score: "*", //'*' means 'unfinished'
 104       moves: [],
 105       cursor: -1, //index of the move just played
 106       lastMove: null,
 107       firstMoveNumber: 0, //for printing
 108       incheck: [] //for Board
 109     };
 110   },
 111   watch: {
 112     // game initial FEN changes when a new game starts
 113     "game.fenStart": function() {
 114       this.re_setVariables();
 115     },
 116   },
 117   computed: {
 118     showMoves: function() {
 119       return this.game.score != "*"
 120         ? "all"
 121         : (this.vr ? this.vr.showMoves : "none");
 122     },
 123     showTurn: function() {
 124       return (
 125         this.game.score == '*' &&
 126         this.vr &&
 127         (this.vr.showMoves != "all" || !this.vr.canFlip)
 128       );
 129     },
 130     turn: function() {
 131       if (!this.vr)
 132         return "";
 133       if (this.vr.showMoves != "all")
 134         return this.st.tr[(this.vr.turn == 'w' ? "White" : "Black") + " to move"]
 135       // Cannot flip: racing king or circular chess
 136       return this.vr.movesCount == 0 && this.game.mycolor == "w"
 137         ? this.st.tr["It's your turn!"]
 138         : "";
 139     },
 140     canAnalyze: function() {
 141       return this.game.mode != "analyze" && this.vr && this.vr.canAnalyze;
 142     },
 143     canFlip: function() {
 144       return this.vr && this.vr.canFlip;
 145     },
 146     allowDownloadPGN: function() {
 147       return this.game.score != "*" || (this.vr && this.vr.showMoves == "all");
 148     }
 149   },
 150   created: function() {
 151     if (this.game.fenStart) this.re_setVariables();
 152   },
 153   mounted: function() {
 154     [
 155       document.getElementById("eogDiv"),
 156       document.getElementById("adjuster")
 157     ].forEach(elt => elt.addEventListener("click", processModalClick));
 158     // Take full width on small screens:
 159     let boardSize = parseInt(localStorage.getItem("boardSize"));
 160     if (!boardSize) {
 161       boardSize =
 162         window.innerWidth >= 768
 163           ? 0.75 * Math.min(window.innerWidth, window.innerHeight)
 164           : window.innerWidth;
 165     }
 166     const movesWidth = window.innerWidth >= 768 ? 280 : 0;
 167     document.getElementById("boardContainer").style.width = boardSize + "px";
 168     let gameContainer = document.getElementById("gameContainer");
 169     gameContainer.style.width = boardSize + movesWidth + "px";
 170     document.getElementById("boardSize").value =
 171       (boardSize * 100) / (window.innerWidth - movesWidth);
 172     // timeout to avoid calling too many time the adjust method
 173     let timeoutLaunched = false;
 174     window.addEventListener("resize", () => {
 175       if (!timeoutLaunched) {
 176         timeoutLaunched = true;
 177         setTimeout(() => {
 178           this.adjustBoard();
 179           timeoutLaunched = false;
 180         }, 500);
 181       }
 182     });
 183   },
 184   methods: {
 185     focusBg: function() {
 186       document.getElementById("baseGame").focus();
 187     },
 188     adjustBoard: function() {
 189       const boardContainer = document.getElementById("boardContainer");
 190       if (!boardContainer) return; //no board on page
 191       const k = document.getElementById("boardSize").value;
 192       const movesWidth = window.innerWidth >= 768 ? 280 : 0;
 193       const minBoardWidth = 240; //TODO: these 240 and 280 are arbitrary...
 194       // Value of 0 is board min size; 100 is window.width [- movesWidth]
 195       const boardSize =
 196         minBoardWidth +
 197         (k * (window.innerWidth - (movesWidth + minBoardWidth))) / 100;
 198       localStorage.setItem("boardSize", boardSize);
 199       boardContainer.style.width = boardSize + "px";
 200       document.getElementById("gameContainer").style.width =
 201         boardSize + movesWidth + "px";
 202     },
 203     handleKeys: function(e) {
 204       if ([32, 37, 38, 39, 40].includes(e.keyCode)) e.preventDefault();
 205       switch (e.keyCode) {
 206         case 37:
 207           this.undo();
 208           break;
 209         case 39:
 210           this.play();
 211           break;
 212         case 38:
 213           this.gotoBegin();
 214           break;
 215         case 40:
 216           this.gotoEnd();
 217           break;
 218         case 32:
 219           this.flip();
 220           break;
 221       }
 222     },
 223     handleScroll: function(e) {
 224       // NOTE: since game.mode=="analyze" => no score, next condition is enough
 225       if (this.game.score != "*") {
 226         e.preventDefault();
 227         if (e.deltaY < 0) this.undo();
 228         else if (e.deltaY > 0) this.play();
 229       }
 230     },
 231     showRules: function() {
 232       //this.$router.push("/variants/" + this.game.vname);
 233       window.open("#/variants/" + this.game.vname, "_blank"); //better
 234     },
 235     re_setVariables: function() {
 236       this.endgameMessage = "";
 237       // "w": default orientation for observed games
 238       this.orientation = this.game.mycolor || "w";
 239       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
 240       // Post-processing: decorate each move with color, notation and FEN
 241       let vr_tmp = new V(this.game.fenStart);
 242       const parsedFen = V.ParseFen(this.game.fenStart);
 243       const firstMoveColor = parsedFen.turn;
 244       this.firstMoveNumber = Math.floor(parsedFen.movesCount / 2);
 245       this.moves.forEach(move => {
 246         move.color = vr_tmp.turn;
 247         move.notation = vr_tmp.getNotation(move);
 248         vr_tmp.play(move);
 249         move.fen = vr_tmp.getFen();
 250       });
 251       if (firstMoveColor == "b") {
 252         // 'end' is required for Board component to check lastMove for e.p.
 253         this.moves.unshift({
 254           color: "w",
 255           notation: "...",
 256           end: { x: -1, y: -1 }
 257         });
 258       }
 259       const L = this.moves.length;
 260       this.cursor = L - 1;
 261       this.lastMove = L > 0 ? this.moves[L - 1] : null;
 262       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 263     },
 264     analyzePosition: function() {
 265       const newUrl =
 266         "/analyse/" +
 267         this.game.vname +
 268         "/?fen=" +
 269         this.vr.getFen().replace(/ /g, "_");
 270       // Open in same tab in live games (against cheating)
 271       if (this.game.type == "live") this.$router.push(newUrl);
 272       else window.open("#" + newUrl);
 273     },
 274     download: function() {
 275       const content = this.getPgn();
 276       // Prepare and trigger download link
 277       let downloadAnchor = document.getElementById("download");
 278       downloadAnchor.setAttribute("download", "game.pgn");
 279       downloadAnchor.href =
 280         "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 281       downloadAnchor.click();
 282     },
 283     getPgn: function() {
 284       let pgn = "";
 285       pgn += '[Site "vchess.club"]\n';
 286       pgn += '[Variant "' + this.game.vname + '"]\n';
 287       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 288       pgn += '[White "' + this.game.players[0].name + '"]\n';
 289       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 290       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 291       pgn += '[Result "' + this.game.score + '"]\n\n';
 292       let counter = 1;
 293       let i = 0;
 294       while (i < this.moves.length) {
 295         pgn += counter++ + ".";
 296         for (let color of ["w", "b"]) {
 297           let move = "";
 298           while (i < this.moves.length && this.moves[i].color == color)
 299             move += this.moves[i++].notation + ",";
 300           move = move.slice(0, -1); //remove last comma
 301           pgn += move + (i < this.moves.length ? " " : "");
 302         }
 303       }
 304       return pgn + "\n";
 305     },
 306     showEndgameMsg: function(message) {
 307       this.endgameMessage = message;
 308       let modalBox = document.getElementById("modalEog");
 309       modalBox.checked = true;
 310       setTimeout(() => {
 311         modalBox.checked = false;
 312       }, 2000);
 313     },
 314     animateMove: function(move, callback) {
 315       let startSquare = document.getElementById(getSquareId(move.start));
 316       let endSquare = document.getElementById(getSquareId(move.end));
 317       let rectStart = startSquare.getBoundingClientRect();
 318       let rectEnd = endSquare.getBoundingClientRect();
 319       let translation = {
 320         x: rectEnd.x - rectStart.x,
 321         y: rectEnd.y - rectStart.y
 322       };
 323       let movingPiece = document.querySelector(
 324         "#" + getSquareId(move.start) + " > img.piece"
 325       );
 326       // HACK for animation (with positive translate, image slides "under background")
 327       // Possible improvement: just alter squares on the piece's way...
 328       const squares = document.getElementsByClassName("board");
 329       for (let i = 0; i < squares.length; i++) {
 330         let square = squares.item(i);
 331         if (square.id != getSquareId(move.start)) square.style.zIndex = "-1";
 332       }
 333       movingPiece.style.transform =
 334         "translate(" + translation.x + "px," + translation.y + "px)";
 335       movingPiece.style.transitionDuration = "0.25s";
 336       movingPiece.style.zIndex = "3000";
 337       setTimeout(() => {
 338         for (let i = 0; i < squares.length; i++)
 339           squares.item(i).style.zIndex = "auto";
 340         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 341         callback();
 342       }, 250);
 343     },
 344     play: function(move, receive) {
 345       // NOTE: navigate and receive are mutually exclusive
 346       const navigate = !move;
 347       // Forbid playing outside analyze mode, except if move is received.
 348       // Sufficient condition because Board already knows which turn it is.
 349       if (
 350         !navigate &&
 351         this.game.mode != "analyze" &&
 352         !receive &&
 353         (this.game.score != "*" || this.cursor < this.moves.length - 1)
 354       ) {
 355         return;
 356       }
 357       const doPlayMove = () => {
 358         // To play a move, cursor must be at the end of the game:
 359         if (!!receive && this.cursor < this.moves.length - 1) this.gotoEnd();
 360         if (navigate) {
 361           if (this.cursor == this.moves.length - 1) return; //no more moves
 362           move = this.moves[this.cursor + 1];
 363         } else {
 364           move.color = this.vr.turn;
 365           move.notation = this.vr.getNotation(move);
 366         }
 367         this.vr.play(move);
 368         this.cursor++;
 369         this.lastMove = move;
 370         if (this.st.settings.sound == 2)
 371           new Audio("/sounds/move.mp3").play().catch(() => {});
 372         if (!navigate) {
 373           move.fen = this.vr.getFen();
 374           // Stack move on movesList at current cursor
 375           if (this.cursor == this.moves.length) this.moves.push(move);
 376           else this.moves = this.moves.slice(0, this.cursor).concat([move]);
 377         }
 378         // Is opponent in check?
 379         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 380         const score = this.vr.getCurrentScore();
 381         if (score != "*") {
 382           const message = getScoreMessage(score);
 383           if (this.game.mode != "analyze")
 384             this.$emit("gameover", score, message);
 385           //just show score on screen (allow undo)
 386           else this.showEndgameMsg(score + " . " + message);
 387         }
 388         if (!navigate && this.game.mode != "analyze")
 389           this.$emit("newmove", move); //post-processing (e.g. computer play)
 390       };
 391       if (!!receive && V.ShowMoves == "all")
 392         this.animateMove(move, doPlayMove);
 393       else doPlayMove();
 394     },
 395     undo: function(move) {
 396       const navigate = !move;
 397       if (navigate) {
 398         if (this.cursor < 0) return; //no more moves
 399         move = this.moves[this.cursor];
 400       }
 401       this.vr.undo(move);
 402       this.cursor--;
 403       this.lastMove = this.cursor >= 0 ? this.moves[this.cursor] : undefined;
 404       if (this.st.settings.sound == 2)
 405         new Audio("/sounds/undo.mp3").play().catch(() => {});
 406       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 407       if (!navigate) this.moves.pop();
 408     },
 409     gotoMove: function(index) {
 410       this.vr.re_init(this.moves[index].fen);
 411       this.cursor = index;
 412       this.lastMove = this.moves[index];
 413       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 414     },
 415     gotoBegin: function() {
 416       if (this.cursor == -1) return;
 417       this.vr.re_init(this.game.fenStart);
 418       if (this.moves.length > 0 && this.moves[0].notation == "...") {
 419         this.cursor = 0;
 420         this.lastMove = this.moves[0];
 421       } else {
 422         this.cursor = -1;
 423         this.lastMove = null;
 424       }
 425       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 426     },
 427     gotoEnd: function() {
 428       if (this.cursor == this.moves.length - 1) return;
 429       this.gotoMove(this.moves.length - 1);
 430     },
 431     flip: function() {
 432       this.orientation = V.GetOppCol(this.orientation);
 433     }
 434   }
 435 };
 436 </script>
 437
 438 <style lang="sass" scoped>
 439 [type="checkbox"]#modalEog+div .card
 440   min-height: 45px
 441
 442 [type="checkbox"]#modalAdjust+div .card
 443   padding: 5px
 444
 445 #baseGame
 446   width: 100%
 447   &:focus
 448     outline: none
 449
 450 #gameContainer
 451   margin-left: auto
 452   margin-right: auto
 453
 454 #downloadDiv
 455   display: inline-block
 456
 457 #controls
 458   margin: 0 auto
 459   text-align: center
 460   button
 461     display: inline-block
 462     width: 20%
 463     margin: 0
 464
 465 #turnIndicator
 466   text-align: center
 467   font-weight: bold
 468
 469 #belowControls
 470   border-top: 1px solid #2f4f4f
 471   text-align: center
 472   margin: 0 auto
 473   & > #downloadDiv
 474     margin: 0
 475     & > button
 476       margin: 0
 477   & > button
 478     border-left: 1px solid #2f4f4f
 479     margin: 0
 480
 481 #boardContainer
 482   float: left
 483 // TODO: later, maybe, allow movesList of variable width
 484 // or e.g. between 250 and 350px (but more complicated)
 485
 486 #movesList
 487   width: 280px
 488   float: left
 489
 490 @media screen and (max-width: 767px)
 491   #movesList
 492     width: 100%
 493     float: none
 494     clear: both
 495 </style>