client/src/components/BaseGame.vue

   1 <template lang="pug">
   2 div#baseGame
   3   input#modalEog.modal(type="checkbox")
   4   div#eogDiv(
   5     role="dialog"
   6     data-checkbox="modalEog"
   7   )
   8     .card.text-center
   9       label.modal-close(for="modalEog")
  10       h3.section {{ endgameMessage }}
  11   #gameContainer
  12     #boardContainer
  13       Board(
  14         ref="board"
  15         :vr="vr"
  16         :last-move="lastMove"
  17         :analyze="game.mode=='analyze'"
  18         :score="game.score"
  19         :user-color="game.mycolor"
  20         :orientation="orientation"
  21         :vname="game.vname"
  22         :incheck="incheck"
  23         @play-move="play"
  24       )
  25       #turnIndicator(v-if="showTurn") {{ turn }}
  26       #controls.button-group
  27         button(@click="gotoBegin()")
  28           img.inline(src="/images/icons/fast-forward_rev.svg")
  29         button(@click="undo()")
  30           img.inline(src="/images/icons/play_rev.svg")
  31         button(v-if="canFlip" @click="flip()")
  32           img.inline(src="/images/icons/flip.svg")
  33         button(
  34           @click="runAutoplay()"
  35           :class="{'in-autoplay': autoplay}"
  36         )
  37           img.inline(src="/images/icons/autoplay.svg")
  38         button(@click="play()")
  39           img.inline(src="/images/icons/play.svg")
  40         button(@click="gotoEnd()")
  41           img.inline(src="/images/icons/fast-forward.svg")
  42     #movesList
  43       MoveList(
  44         :show="showMoves"
  45         :canAnalyze="canAnalyze"
  46         :canDownload="allowDownloadPGN"
  47         :score="game.score"
  48         :message="game.scoreMsg"
  49         :firstNum="firstMoveNumber"
  50         :moves="moves"
  51         :cursor="cursor"
  52         @download="download"
  53         @showrules="showRules"
  54         @analyze="analyzePosition"
  55         @goto-move="gotoMove"
  56       )
  57     .clearer
  58 </template>
  59
  60 <script>
  61 import Board from "@/components/Board.vue";
  62 import MoveList from "@/components/MoveList.vue";
  63 import { store } from "@/store";
  64 import { getSquareId } from "@/utils/squareId";
  65 import { getDate } from "@/utils/datetime";
  66 import { processModalClick } from "@/utils/modalClick";
  67 import { getScoreMessage } from "@/utils/scoring";
  68 import { getFullNotation } from "@/utils/notation";
  69 import { undoMove } from "@/utils/playUndo";
  70 export default {
  71   name: "my-base-game",
  72   components: {
  73     Board,
  74     MoveList
  75   },
  76   props: ["game"],
  77   data: function() {
  78     return {
  79       st: store.state,
  80       // NOTE: all following variables must be reset at the beginning of a game
  81       vr: null, //VariantRules object, game state
  82       endgameMessage: "",
  83       orientation: "w",
  84       score: "*", //'*' means 'unfinished'
  85       moves: [],
  86       cursor: -1, //index of the move just played
  87       lastMove: null,
  88       firstMoveNumber: 0, //for printing
  89       incheck: [], //for Board
  90       inMultimove: false,
  91       autoplay: false,
  92       autoplayLoop: null,
  93       inPlay: false,
  94       stackToPlay: []
  95     };
  96   },
  97   computed: {
  98     turn: function() {
  99       if (!this.vr) return "";
 100       if (this.vr.showMoves != "all") {
 101         return this.st.tr[
 102           (this.vr.turn == 'w' ? "White" : "Black") + " to move"];
 103       }
 104       // Cannot flip: racing king or circular chess
 105       return (
 106         this.vr.movesCount == 0 && this.game.mycolor == "w"
 107           ? this.st.tr["It's your turn!"]
 108           : ""
 109       );
 110     },
 111     // TODO: is it OK to pass "computed" as propoerties?
 112     // Also, some are seemingly not recomputed when vr is initialized.
 113     showMoves: function() {
 114       return this.game.score != "*"
 115         ? "all"
 116         : (!!this.vr ? this.vr.showMoves : "none");
 117     },
 118     showTurn: function() {
 119       return (
 120         this.game.score == '*' &&
 121         !!this.vr && (this.vr.showMoves != "all" || !this.vr.canFlip)
 122       );
 123     },
 124     canAnalyze: function() {
 125       return (
 126         this.game.mode != "analyze" &&
 127         !!this.vr && this.vr.canAnalyze
 128       );
 129     },
 130     canFlip: function() {
 131       return !!this.vr && this.vr.canFlip;
 132     },
 133     allowDownloadPGN: function() {
 134       return (
 135         this.game.score != "*" ||
 136         (!!this.vr && this.vr.showMoves == "all")
 137       );
 138     }
 139   },
 140   created: function() {
 141     if (!!this.game.fenStart) this.re_setVariables();
 142   },
 143   mounted: function() {
 144     if (!("ontouchstart" in window)) {
 145       // Desktop browser:
 146       const baseGameDiv = document.getElementById("baseGame");
 147       baseGameDiv.tabIndex = 0;
 148       baseGameDiv.addEventListener("click", this.focusBg);
 149       baseGameDiv.addEventListener("keydown", this.handleKeys);
 150       baseGameDiv.addEventListener("wheel", this.handleScroll);
 151     }
 152     document.getElementById("eogDiv")
 153       .addEventListener("click", processModalClick);
 154   },
 155   beforeDestroy: function() {
 156     if (!!this.autoplayLoop) clearInterval(this.autoplayLoop);
 157   },
 158   methods: {
 159     focusBg: function() {
 160       document.getElementById("baseGame").focus();
 161     },
 162     handleKeys: function(e) {
 163       if ([32, 37, 38, 39, 40].includes(e.keyCode)) e.preventDefault();
 164       switch (e.keyCode) {
 165         case 37:
 166           this.undo();
 167           break;
 168         case 39:
 169           this.play();
 170           break;
 171         case 38:
 172           this.gotoBegin();
 173           break;
 174         case 40:
 175           this.gotoEnd();
 176           break;
 177         case 32:
 178           this.flip();
 179           break;
 180       }
 181     },
 182     handleScroll: function(e) {
 183       e.preventDefault();
 184       if (e.deltaY < 0) this.undo();
 185       else if (e.deltaY > 0) this.play();
 186     },
 187     showRules: function() {
 188       //this.$router.push("/variants/" + this.game.vname);
 189       window.open("#/variants/" + this.game.vname, "_blank"); //better
 190     },
 191     re_setVariables: function(game) {
 192       if (!game) game = this.game; //in case of...
 193       this.endgameMessage = "";
 194       // "w": default orientation for observed games
 195       this.orientation = game.mycolor || "w";
 196       this.moves = JSON.parse(JSON.stringify(game.moves || []));
 197       // Post-processing: decorate each move with notation and FEN
 198       this.vr = new V(game.fenStart);
 199       const parsedFen = V.ParseFen(game.fenStart);
 200       const firstMoveColor = parsedFen.turn;
 201       this.firstMoveNumber = Math.floor(parsedFen.movesCount / 2);
 202       let L = this.moves.length;
 203       this.moves.forEach(move => {
 204         // Strategy working also for multi-moves:
 205         if (!Array.isArray(move)) move = [move];
 206         move.forEach((m,idx) => {
 207           m.notation = this.vr.getNotation(m);
 208           this.vr.play(m);
 209           if (idx < L - 1 && this.vr.getCheckSquares(this.vr.turn).length > 0)
 210             m.notation += "+";
 211         });
 212       });
 213       if (firstMoveColor == "b") {
 214         // 'start' & 'end' is required for Board component
 215         this.moves.unshift({
 216           notation: "...",
 217           start: { x: -1, y: -1 },
 218           end: { x: -1, y: -1 },
 219           fen: game.fenStart
 220         });
 221         L++;
 222       }
 223       this.positionCursorTo(this.moves.length - 1);
 224       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 225       const score = this.vr.getCurrentScore();
 226       if (L > 0 && this.moves[L - 1].notation != "...") {
 227         if (["1-0","0-1"].includes(score))
 228           this.moves[L - 1].notation += "#";
 229         else if (this.vr.getCheckSquares(this.vr.turn).length > 0)
 230           this.moves[L - 1].notation += "+";
 231       }
 232     },
 233     positionCursorTo: function(index) {
 234       this.cursor = index;
 235       // Caution: last move in moves array might be a multi-move
 236       if (index >= 0) {
 237         if (Array.isArray(this.moves[index])) {
 238           const L = this.moves[index].length;
 239           this.lastMove = this.moves[index][L - 1];
 240         } else {
 241           this.lastMove = this.moves[index];
 242         }
 243       } else this.lastMove = null;
 244     },
 245     analyzePosition: function() {
 246       let newUrl =
 247         "/analyse/" +
 248         this.game.vname +
 249         "/?fen=" +
 250         this.vr.getFen().replace(/ /g, "_");
 251       if (this.game.mycolor)
 252         newUrl += "&side=" + this.game.mycolor;
 253       // Open in same tab in live games (against cheating)
 254       if (this.game.type == "live") this.$router.push(newUrl);
 255       else window.open("#" + newUrl);
 256     },
 257     download: function() {
 258       const content = this.getPgn();
 259       // Prepare and trigger download link
 260       let downloadAnchor = document.getElementById("download");
 261       downloadAnchor.setAttribute("download", "game.pgn");
 262       downloadAnchor.href =
 263         "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 264       downloadAnchor.click();
 265     },
 266     getPgn: function() {
 267       let pgn = "";
 268       pgn += '[Site "vchess.club"]\n';
 269       pgn += '[Variant "' + this.game.vname + '"]\n';
 270       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 271       pgn += '[White "' + this.game.players[0].name + '"]\n';
 272       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 273       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 274       pgn += '[Result "' + this.game.score + '"]\n\n';
 275       for (let i = 0; i < this.moves.length; i += 2) {
 276         pgn += (i/2+1) + "." + getFullNotation(this.moves[i]) + " ";
 277         if (i+1 < this.moves.length)
 278           pgn += getFullNotation(this.moves[i+1]) + " ";
 279       }
 280       return pgn + "\n";
 281     },
 282     showEndgameMsg: function(message) {
 283       this.endgameMessage = message;
 284       document.getElementById("modalEog").checked = true;
 285     },
 286     runAutoplay: function() {
 287       const infinitePlay = () => {
 288         if (this.cursor == this.moves.length - 1) {
 289           clearInterval(this.autoplayLoop);
 290           this.autoplayLoop = null;
 291           this.autoplay = false;
 292           return;
 293         }
 294         if (this.inPlay || this.inMultimove)
 295           // Wait next tick
 296           return;
 297         this.play();
 298       };
 299       if (this.autoplay) {
 300         this.autoplay = false;
 301         clearInterval(this.autoplayLoop);
 302         this.autoplayLoop = null;
 303       } else {
 304         this.autoplay = true;
 305         infinitePlay();
 306         this.autoplayLoop = setInterval(infinitePlay, 1500);
 307       }
 308     },
 309     // Animate an elementary move
 310     animateMove: function(move, callback) {
 311       let startSquare = document.getElementById(getSquareId(move.start));
 312       if (!startSquare) return; //shouldn't happen but...
 313       let endSquare = document.getElementById(getSquareId(move.end));
 314       let rectStart = startSquare.getBoundingClientRect();
 315       let rectEnd = endSquare.getBoundingClientRect();
 316       let translation = {
 317         x: rectEnd.x - rectStart.x,
 318         y: rectEnd.y - rectStart.y
 319       };
 320       let movingPiece = document.querySelector(
 321         "#" + getSquareId(move.start) + " > img.piece"
 322       );
 323       // For some unknown reasons Opera get "movingPiece == null" error
 324       // TOOO: is it calling 'animate()' twice ? One extra time ?
 325       if (!movingPiece) return;
 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     // For Analyse mode:
 345     emitFenIfAnalyze: function() {
 346       if (this.game.mode == "analyze") {
 347         this.$emit(
 348           "fenchange",
 349           !!this.lastMove ? this.lastMove.fen : this.game.fenStart
 350         );
 351       }
 352     },
 353     // "light": if gotoMove() or gotoEnd()
 354     play: function(move, received, light, noemit) {
 355       // Freeze while choices are shown:
 356       if (this.$refs["board"].choices.length > 0) return;
 357       if (!!noemit) {
 358         if (this.inPlay) {
 359           // Received moves in observed games can arrive too fast:
 360           this.stackToPlay.unshift(move);
 361           return;
 362         }
 363         this.inPlay = true;
 364       }
 365       const navigate = !move;
 366       const playSubmove = (smove) => {
 367         smove.notation = this.vr.getNotation(smove);
 368         this.vr.play(smove);
 369         this.lastMove = smove;
 370         if (!this.inMultimove) {
 371           // Condition is "!navigate" but we mean "!this.autoplay"
 372           if (!navigate) {
 373             if (this.cursor < this.moves.length - 1)
 374               this.moves = this.moves.slice(0, this.cursor + 1);
 375             this.moves.push(smove);
 376           }
 377           this.inMultimove = true; //potentially
 378           this.cursor++;
 379         } else if (!navigate) {
 380           // Already in the middle of a multi-move
 381           const L = this.moves.length;
 382           if (!Array.isArray(this.moves[L-1]))
 383             this.$set(this.moves, L-1, [this.moves[L-1], smove]);
 384           else
 385             this.$set(this.moves, L-1, this.moves.concat([smove]));
 386         }
 387       };
 388       const playMove = () => {
 389         const animate = (
 390           V.ShowMoves == "all" &&
 391           (this.autoplay || !!received)
 392         );
 393         if (!Array.isArray(move)) move = [move];
 394         let moveIdx = 0;
 395         let self = this;
 396         const initurn = this.vr.turn;
 397         (function executeMove() {
 398           const smove = move[moveIdx++];
 399           if (animate) {
 400             self.animateMove(smove, () => {
 401               playSubmove(smove);
 402               if (moveIdx < move.length)
 403                 setTimeout(executeMove, 500);
 404               else afterMove(smove, initurn);
 405             });
 406           } else {
 407             playSubmove(smove);
 408             if (moveIdx < move.length) executeMove();
 409             else afterMove(smove, initurn);
 410           }
 411         })();
 412       };
 413       const computeScore = () => {
 414         const score = this.vr.getCurrentScore();
 415         if (!navigate) {
 416           if (["1-0","0-1"].includes(score))
 417             this.lastMove.notation += "#";
 418           else if (this.vr.getCheckSquares(this.vr.turn).length > 0)
 419             this.lastMove.notation += "+";
 420         }
 421         if (score != "*" && this.game.mode == "analyze") {
 422           const message = getScoreMessage(score);
 423           // Just show score on screen (allow undo)
 424           this.showEndgameMsg(score + " . " + this.st.tr[message]);
 425         }
 426         return score;
 427       };
 428       const afterMove = (smove, initurn) => {
 429         if (this.vr.turn != initurn) {
 430           // Turn has changed: move is complete
 431           if (!smove.fen)
 432             // NOTE: only FEN of last sub-move is required (thus setting it here)
 433             smove.fen = this.vr.getFen();
 434           // Is opponent in check?
 435           this.incheck = this.vr.getCheckSquares(this.vr.turn);
 436           this.emitFenIfAnalyze();
 437           this.inMultimove = false;
 438           this.score = computeScore();
 439           if (this.game.mode != "analyze" && !navigate) {
 440             if (!noemit) {
 441               // Post-processing (e.g. computer play).
 442               const L = this.moves.length;
 443               // NOTE: always emit the score, even in unfinished,
 444               // to tell Game::processMove() that it's not a received move.
 445               this.$emit("newmove", this.moves[L-1], { score: this.score });
 446             } else {
 447               this.inPlay = false;
 448               if (this.stackToPlay.length > 0)
 449                 // Move(s) arrived in-between
 450                 this.play(this.stackToPlay.pop(), received, light, noemit);
 451             }
 452           }
 453         }
 454       };
 455       // NOTE: navigate and received are mutually exclusive
 456       if (navigate) {
 457         // The move to navigate to is necessarily full:
 458         if (this.cursor == this.moves.length - 1) return; //no more moves
 459         move = this.moves[this.cursor + 1];
 460         if (!this.autoplay) {
 461           // Just play the move:
 462           if (!Array.isArray(move)) move = [move];
 463           for (let i=0; i < move.length; i++) this.vr.play(move[i]);
 464           if (!light) {
 465             this.lastMove = move[move.length-1];
 466             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 467             this.score = computeScore();
 468             this.emitFenIfAnalyze();
 469           }
 470           this.cursor++;
 471           return;
 472         }
 473       }
 474       // Forbid playing outside analyze mode, except if move is received.
 475       // Sufficient condition because Board already knows which turn it is.
 476       if (
 477         this.game.mode != "analyze" &&
 478         !navigate &&
 479         !received &&
 480         (this.game.score != "*" || this.cursor < this.moves.length - 1)
 481       ) {
 482         return;
 483       }
 484       // To play a received move, cursor must be at the end of the game:
 485       if (received && this.cursor < this.moves.length - 1)
 486         this.gotoEnd();
 487       playMove();
 488     },
 489     cancelCurrentMultimove: function() {
 490       const L = this.moves.length;
 491       let move = this.moves[L-1];
 492       if (!Array.isArray(move)) move = [move];
 493       for (let i=move.length -1; i >= 0; i--) this.vr.undo(move[i]);
 494       this.moves.pop();
 495       this.cursor--;
 496       this.inMultimove = false;
 497     },
 498     cancelLastMove: function() {
 499       // The last played move was canceled (corr game)
 500       this.undo();
 501       this.moves.pop();
 502     },
 503     // "light": if gotoMove() or gotoBegin()
 504     undo: function(move, light) {
 505       // Freeze while choices are shown:
 506       if (this.$refs["board"].choices.length > 0) return;
 507       if (this.inMultimove) {
 508         this.cancelCurrentMultimove();
 509         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 510       } else {
 511         if (!move) {
 512           const minCursor =
 513             this.moves.length > 0 && this.moves[0].notation == "..."
 514               ? 1
 515               : 0;
 516           if (this.cursor < minCursor) return; //no more moves
 517           move = this.moves[this.cursor];
 518         }
 519         undoMove(move, this.vr);
 520         if (light) this.cursor--;
 521         else {
 522           this.positionCursorTo(this.cursor - 1);
 523           this.incheck = this.vr.getCheckSquares(this.vr.turn);
 524           this.emitFenIfAnalyze();
 525         }
 526       }
 527     },
 528     gotoMove: function(index) {
 529       if (this.$refs["board"].choices.length > 0) return;
 530       if (this.inMultimove) this.cancelCurrentMultimove();
 531       if (index == this.cursor) return;
 532       if (index < this.cursor) {
 533         while (this.cursor > index)
 534           this.undo(null, null, "light");
 535       }
 536       else {
 537         // index > this.cursor)
 538         while (this.cursor < index)
 539           this.play(null, null, "light");
 540       }
 541       // NOTE: next line also re-assign cursor, but it's very light
 542       this.positionCursorTo(index);
 543       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 544       this.emitFenIfAnalyze();
 545     },
 546     gotoBegin: function() {
 547       if (this.$refs["board"].choices.length > 0) return;
 548       if (this.inMultimove) this.cancelCurrentMultimove();
 549       const minCursor =
 550         this.moves.length > 0 && this.moves[0].notation == "..."
 551           ? 1
 552           : 0;
 553       while (this.cursor >= minCursor) this.undo(null, null, "light");
 554       this.lastMove = (minCursor == 1 ? this.moves[0] : null);
 555       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 556       this.emitFenIfAnalyze();
 557     },
 558     gotoEnd: function() {
 559       if (this.$refs["board"].choices.length > 0) return;
 560       if (this.cursor == this.moves.length - 1) return;
 561       this.gotoMove(this.moves.length - 1);
 562       this.emitFenIfAnalyze();
 563     },
 564     flip: function() {
 565       if (this.$refs["board"].choices.length > 0) return;
 566       this.orientation = V.GetOppCol(this.orientation);
 567     }
 568   }
 569 };
 570 </script>
 571
 572 <style lang="sass" scoped>
 573 [type="checkbox"]#modalEog+div .card
 574   min-height: 45px
 575
 576 #baseGame
 577   width: 100%
 578   &:focus
 579     outline: none
 580
 581 #gameContainer
 582   margin-left: auto
 583   margin-right: auto
 584
 585 #downloadDiv
 586   display: inline-block
 587
 588 #controls
 589   user-select: none
 590   button
 591     border: none
 592     margin: 0
 593     padding-top: 5px
 594     padding-bottom: 5px
 595
 596 .in-autoplay
 597   background-color: #FACF8C
 598
 599 img.inline
 600   height: 22px
 601   padding-top: 5px
 602   @media screen and (max-width: 767px)
 603     height: 18px
 604
 605 #turnIndicator
 606   text-align: center
 607   font-weight: bold
 608
 609 #boardContainer
 610   float: left
 611 // TODO: later, maybe, allow movesList of variable width
 612 // or e.g. between 250 and 350px (but more complicated)
 613
 614 #movesList
 615   width: 280px
 616   float: left
 617
 618 @media screen and (max-width: 767px)
 619   #movesList
 620     width: 100%
 621     float: none
 622     clear: both
 623 </style>