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     showMoves: function() {
  99       return this.game.score != "*"
 100         ? "all"
 101         : (this.vr ? this.vr.showMoves : "none");
 102     },
 103     showTurn: function() {
 104       return (
 105         this.game.score == '*' &&
 106         this.vr &&
 107         (this.vr.showMoves != "all" || !this.vr.canFlip)
 108       );
 109     },
 110     turn: function() {
 111       if (!this.vr)
 112         return "";
 113       if (this.vr.showMoves != "all")
 114         return this.st.tr[(this.vr.turn == 'w' ? "White" : "Black") + " to move"]
 115       // Cannot flip: racing king or circular chess
 116       return this.vr.movesCount == 0 && this.game.mycolor == "w"
 117         ? this.st.tr["It's your turn!"]
 118         : "";
 119     },
 120     canAnalyze: function() {
 121       return this.game.mode != "analyze" && this.vr && this.vr.canAnalyze;
 122     },
 123     canFlip: function() {
 124       return this.vr && this.vr.canFlip;
 125     },
 126     allowDownloadPGN: function() {
 127       return this.game.score != "*" || (this.vr && this.vr.showMoves == "all");
 128     }
 129   },
 130   created: function() {
 131     if (!!this.game.fenStart) this.re_setVariables();
 132   },
 133   mounted: function() {
 134     if (!("ontouchstart" in window)) {
 135       // Desktop browser:
 136       const baseGameDiv = document.getElementById("baseGame");
 137       baseGameDiv.tabIndex = 0;
 138       baseGameDiv.addEventListener("click", this.focusBg);
 139       baseGameDiv.addEventListener("keydown", this.handleKeys);
 140       baseGameDiv.addEventListener("wheel", this.handleScroll);
 141     }
 142     document.getElementById("eogDiv")
 143       .addEventListener("click", processModalClick);
 144   },
 145   beforeDestroy: function() {
 146     if (!!this.autoplayLoop) clearInterval(this.autoplayLoop);
 147   },
 148   methods: {
 149     focusBg: function() {
 150       document.getElementById("baseGame").focus();
 151     },
 152     handleKeys: function(e) {
 153       if ([32, 37, 38, 39, 40].includes(e.keyCode)) e.preventDefault();
 154       switch (e.keyCode) {
 155         case 37:
 156           this.undo();
 157           break;
 158         case 39:
 159           this.play();
 160           break;
 161         case 38:
 162           this.gotoBegin();
 163           break;
 164         case 40:
 165           this.gotoEnd();
 166           break;
 167         case 32:
 168           this.flip();
 169           break;
 170       }
 171     },
 172     handleScroll: function(e) {
 173       e.preventDefault();
 174       if (e.deltaY < 0) this.undo();
 175       else if (e.deltaY > 0) this.play();
 176     },
 177     showRules: function() {
 178       //this.$router.push("/variants/" + this.game.vname);
 179       window.open("#/variants/" + this.game.vname, "_blank"); //better
 180     },
 181     re_setVariables: function(game) {
 182       if (!game) game = this.game; //in case of...
 183       this.endgameMessage = "";
 184       // "w": default orientation for observed games
 185       this.orientation = game.mycolor || "w";
 186       this.moves = JSON.parse(JSON.stringify(game.moves || []));
 187       // Post-processing: decorate each move with notation and FEN
 188       this.vr = new V(game.fenStart);
 189       const parsedFen = V.ParseFen(game.fenStart);
 190       const firstMoveColor = parsedFen.turn;
 191       this.firstMoveNumber = Math.floor(parsedFen.movesCount / 2);
 192       let L = this.moves.length;
 193       this.moves.forEach(move => {
 194         // Strategy working also for multi-moves:
 195         if (!Array.isArray(move)) move = [move];
 196         move.forEach((m,idx) => {
 197           m.notation = this.vr.getNotation(m);
 198           this.vr.play(m);
 199           if (idx < L - 1 && this.vr.getCheckSquares(this.vr.turn).length > 0)
 200             m.notation += "+";
 201         });
 202       });
 203       if (firstMoveColor == "b") {
 204         // 'start' & 'end' is required for Board component
 205         this.moves.unshift({
 206           notation: "...",
 207           start: { x: -1, y: -1 },
 208           end: { x: -1, y: -1 },
 209           fen: game.fenStart
 210         });
 211         L++;
 212       }
 213       this.positionCursorTo(this.moves.length - 1);
 214       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 215       const score = this.vr.getCurrentScore();
 216       if (L > 0 && this.moves[L - 1].notation != "...") {
 217         if (["1-0","0-1"].includes(score))
 218           this.moves[L - 1].notation += "#";
 219         else if (this.vr.getCheckSquares(this.vr.turn).length > 0)
 220           this.moves[L - 1].notation += "+";
 221       }
 222     },
 223     positionCursorTo: function(index) {
 224       this.cursor = index;
 225       // Caution: last move in moves array might be a multi-move
 226       if (index >= 0) {
 227         if (Array.isArray(this.moves[index])) {
 228           const L = this.moves[index].length;
 229           this.lastMove = this.moves[index][L - 1];
 230         } else {
 231           this.lastMove = this.moves[index];
 232         }
 233       } else this.lastMove = null;
 234     },
 235     analyzePosition: function() {
 236       let newUrl =
 237         "/analyse/" +
 238         this.game.vname +
 239         "/?fen=" +
 240         this.vr.getFen().replace(/ /g, "_");
 241       if (this.game.mycolor)
 242         newUrl += "&side=" + this.game.mycolor;
 243       // Open in same tab in live games (against cheating)
 244       if (this.game.type == "live") this.$router.push(newUrl);
 245       else window.open("#" + newUrl);
 246     },
 247     download: function() {
 248       const content = this.getPgn();
 249       // Prepare and trigger download link
 250       let downloadAnchor = document.getElementById("download");
 251       downloadAnchor.setAttribute("download", "game.pgn");
 252       downloadAnchor.href =
 253         "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 254       downloadAnchor.click();
 255     },
 256     getPgn: function() {
 257       let pgn = "";
 258       pgn += '[Site "vchess.club"]\n';
 259       pgn += '[Variant "' + this.game.vname + '"]\n';
 260       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 261       pgn += '[White "' + this.game.players[0].name + '"]\n';
 262       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 263       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 264       pgn += '[Result "' + this.game.score + '"]\n\n';
 265       for (let i = 0; i < this.moves.length; i += 2) {
 266         pgn += (i/2+1) + "." + getFullNotation(this.moves[i]) + " ";
 267         if (i+1 < this.moves.length)
 268           pgn += getFullNotation(this.moves[i+1]) + " ";
 269       }
 270       return pgn + "\n";
 271     },
 272     showEndgameMsg: function(message) {
 273       this.endgameMessage = message;
 274       document.getElementById("modalEog").checked = true;
 275     },
 276     runAutoplay: function() {
 277       const infinitePlay = () => {
 278         if (this.cursor == this.moves.length - 1) {
 279           clearInterval(this.autoplayLoop);
 280           this.autoplayLoop = null;
 281           this.autoplay = false;
 282           return;
 283         }
 284         if (this.inPlay || this.inMultimove)
 285           // Wait next tick
 286           return;
 287         this.play();
 288       };
 289       if (this.autoplay) {
 290         this.autoplay = false;
 291         clearInterval(this.autoplayLoop);
 292         this.autoplayLoop = null;
 293       } else {
 294         this.autoplay = true;
 295         infinitePlay();
 296         this.autoplayLoop = setInterval(infinitePlay, 1500);
 297       }
 298     },
 299     // Animate an elementary move
 300     animateMove: function(move, callback) {
 301       let startSquare = document.getElementById(getSquareId(move.start));
 302       if (!startSquare) return; //shouldn't happen but...
 303       let endSquare = document.getElementById(getSquareId(move.end));
 304       let rectStart = startSquare.getBoundingClientRect();
 305       let rectEnd = endSquare.getBoundingClientRect();
 306       let translation = {
 307         x: rectEnd.x - rectStart.x,
 308         y: rectEnd.y - rectStart.y
 309       };
 310       let movingPiece = document.querySelector(
 311         "#" + getSquareId(move.start) + " > img.piece"
 312       );
 313       // For some unknown reasons Opera get "movingPiece == null" error
 314       // TOOO: is it calling 'animate()' twice ? One extra time ?
 315       if (!movingPiece) return;
 316       // HACK for animation (with positive translate, image slides "under background")
 317       // Possible improvement: just alter squares on the piece's way...
 318       const squares = document.getElementsByClassName("board");
 319       for (let i = 0; i < squares.length; i++) {
 320         let square = squares.item(i);
 321         if (square.id != getSquareId(move.start)) square.style.zIndex = "-1";
 322       }
 323       movingPiece.style.transform =
 324         "translate(" + translation.x + "px," + translation.y + "px)";
 325       movingPiece.style.transitionDuration = "0.25s";
 326       movingPiece.style.zIndex = "3000";
 327       setTimeout(() => {
 328         for (let i = 0; i < squares.length; i++)
 329           squares.item(i).style.zIndex = "auto";
 330         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 331         callback();
 332       }, 250);
 333     },
 334     // For Analyse mode:
 335     emitFenIfAnalyze: function() {
 336       if (this.game.mode == "analyze") {
 337         this.$emit(
 338           "fenchange",
 339           !!this.lastMove ? this.lastMove.fen : this.game.fenStart
 340         );
 341       }
 342     },
 343     // "light": if gotoMove() or gotoEnd()
 344     play: function(move, received, light, noemit) {
 345       // Freeze while choices are shown:
 346       if (this.$refs["board"].choices.length > 0) return;
 347       if (!!noemit) {
 348         if (this.inPlay) {
 349           // Received moves in observed games can arrive too fast:
 350           this.stackToPlay.unshift(move);
 351           return;
 352         }
 353         this.inPlay = true;
 354       }
 355       const navigate = !move;
 356       const playSubmove = (smove) => {
 357         smove.notation = this.vr.getNotation(smove);
 358         this.vr.play(smove);
 359         this.lastMove = smove;
 360         if (!this.inMultimove) {
 361           // Condition is "!navigate" but we mean "!this.autoplay"
 362           if (!navigate) {
 363             if (this.cursor < this.moves.length - 1)
 364               this.moves = this.moves.slice(0, this.cursor + 1);
 365             this.moves.push(smove);
 366           }
 367           this.inMultimove = true; //potentially
 368           this.cursor++;
 369         } else if (!navigate) {
 370           // Already in the middle of a multi-move
 371           const L = this.moves.length;
 372           if (!Array.isArray(this.moves[L-1]))
 373             this.$set(this.moves, L-1, [this.moves[L-1], smove]);
 374           else
 375             this.$set(this.moves, L-1, this.moves.concat([smove]));
 376         }
 377       };
 378       const playMove = () => {
 379         const animate = (
 380           V.ShowMoves == "all" &&
 381           (this.autoplay || !!received)
 382         );
 383         if (!Array.isArray(move)) move = [move];
 384         let moveIdx = 0;
 385         let self = this;
 386         const initurn = this.vr.turn;
 387         (function executeMove() {
 388           const smove = move[moveIdx++];
 389           if (animate) {
 390             self.animateMove(smove, () => {
 391               playSubmove(smove);
 392               if (moveIdx < move.length)
 393                 setTimeout(executeMove, 500);
 394               else afterMove(smove, initurn);
 395             });
 396           } else {
 397             playSubmove(smove);
 398             if (moveIdx < move.length) executeMove();
 399             else afterMove(smove, initurn);
 400           }
 401         })();
 402       };
 403       const computeScore = () => {
 404         const score = this.vr.getCurrentScore();
 405         if (!navigate) {
 406           if (["1-0","0-1"].includes(score))
 407             this.lastMove.notation += "#";
 408           else if (this.vr.getCheckSquares(this.vr.turn).length > 0)
 409             this.lastMove.notation += "+";
 410         }
 411         if (score != "*" && this.game.mode == "analyze") {
 412           const message = getScoreMessage(score);
 413           // Just show score on screen (allow undo)
 414           this.showEndgameMsg(score + " . " + this.st.tr[message]);
 415         }
 416         return score;
 417       };
 418       const afterMove = (smove, initurn) => {
 419         if (this.vr.turn != initurn) {
 420           // Turn has changed: move is complete
 421           if (!smove.fen)
 422             // NOTE: only FEN of last sub-move is required (thus setting it here)
 423             smove.fen = this.vr.getFen();
 424           // Is opponent in check?
 425           this.incheck = this.vr.getCheckSquares(this.vr.turn);
 426           this.emitFenIfAnalyze();
 427           this.inMultimove = false;
 428           this.score = computeScore();
 429           if (this.game.mode != "analyze" && !navigate) {
 430             if (!noemit) {
 431               // Post-processing (e.g. computer play).
 432               const L = this.moves.length;
 433               // NOTE: always emit the score, even in unfinished,
 434               // to tell Game::processMove() that it's not a received move.
 435               this.$emit("newmove", this.moves[L-1], { score: this.score });
 436             } else {
 437               this.inPlay = false;
 438               if (this.stackToPlay.length > 0)
 439                 // Move(s) arrived in-between
 440                 this.play(this.stackToPlay.pop(), received, light, noemit);
 441             }
 442           }
 443         }
 444       };
 445       // NOTE: navigate and received are mutually exclusive
 446       if (navigate) {
 447         // The move to navigate to is necessarily full:
 448         if (this.cursor == this.moves.length - 1) return; //no more moves
 449         move = this.moves[this.cursor + 1];
 450         if (!this.autoplay) {
 451           // Just play the move:
 452           if (!Array.isArray(move)) move = [move];
 453           for (let i=0; i < move.length; i++) this.vr.play(move[i]);
 454           if (!light) {
 455             this.lastMove = move[move.length-1];
 456             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 457             this.score = computeScore();
 458             this.emitFenIfAnalyze();
 459           }
 460           this.cursor++;
 461           return;
 462         }
 463       }
 464       // Forbid playing outside analyze mode, except if move is received.
 465       // Sufficient condition because Board already knows which turn it is.
 466       if (
 467         this.game.mode != "analyze" &&
 468         !navigate &&
 469         !received &&
 470         (this.game.score != "*" || this.cursor < this.moves.length - 1)
 471       ) {
 472         return;
 473       }
 474       // To play a received move, cursor must be at the end of the game:
 475       if (received && this.cursor < this.moves.length - 1)
 476         this.gotoEnd();
 477       playMove();
 478     },
 479     cancelCurrentMultimove: function() {
 480       const L = this.moves.length;
 481       let move = this.moves[L-1];
 482       if (!Array.isArray(move)) move = [move];
 483       for (let i=move.length -1; i >= 0; i--) this.vr.undo(move[i]);
 484       this.moves.pop();
 485       this.cursor--;
 486       this.inMultimove = false;
 487     },
 488     cancelLastMove: function() {
 489       // The last played move was canceled (corr game)
 490       this.undo();
 491       this.moves.pop();
 492     },
 493     // "light": if gotoMove() or gotoBegin()
 494     undo: function(move, light) {
 495       // Freeze while choices are shown:
 496       if (this.$refs["board"].choices.length > 0) return;
 497       if (this.inMultimove) {
 498         this.cancelCurrentMultimove();
 499         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 500       } else {
 501         if (!move) {
 502           const minCursor =
 503             this.moves.length > 0 && this.moves[0].notation == "..."
 504               ? 1
 505               : 0;
 506           if (this.cursor < minCursor) return; //no more moves
 507           move = this.moves[this.cursor];
 508         }
 509         undoMove(move, this.vr);
 510         if (light) this.cursor--;
 511         else {
 512           this.positionCursorTo(this.cursor - 1);
 513           this.incheck = this.vr.getCheckSquares(this.vr.turn);
 514           this.emitFenIfAnalyze();
 515         }
 516       }
 517     },
 518     gotoMove: function(index) {
 519       if (this.$refs["board"].choices.length > 0) return;
 520       if (this.inMultimove) this.cancelCurrentMultimove();
 521       if (index == this.cursor) return;
 522       if (index < this.cursor) {
 523         while (this.cursor > index)
 524           this.undo(null, null, "light");
 525       }
 526       else {
 527         // index > this.cursor)
 528         while (this.cursor < index)
 529           this.play(null, null, "light");
 530       }
 531       // NOTE: next line also re-assign cursor, but it's very light
 532       this.positionCursorTo(index);
 533       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 534       this.emitFenIfAnalyze();
 535     },
 536     gotoBegin: function() {
 537       if (this.$refs["board"].choices.length > 0) return;
 538       if (this.inMultimove) this.cancelCurrentMultimove();
 539       const minCursor =
 540         this.moves.length > 0 && this.moves[0].notation == "..."
 541           ? 1
 542           : 0;
 543       while (this.cursor >= minCursor) this.undo(null, null, "light");
 544       this.lastMove = (minCursor == 1 ? this.moves[0] : null);
 545       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 546       this.emitFenIfAnalyze();
 547     },
 548     gotoEnd: function() {
 549       if (this.$refs["board"].choices.length > 0) return;
 550       if (this.cursor == this.moves.length - 1) return;
 551       this.gotoMove(this.moves.length - 1);
 552       this.emitFenIfAnalyze();
 553     },
 554     flip: function() {
 555       if (this.$refs["board"].choices.length > 0) return;
 556       this.orientation = V.GetOppCol(this.orientation);
 557     }
 558   }
 559 };
 560 </script>
 561
 562 <style lang="sass" scoped>
 563 [type="checkbox"]#modalEog+div .card
 564   min-height: 45px
 565
 566 #baseGame
 567   width: 100%
 568   &:focus
 569     outline: none
 570
 571 #gameContainer
 572   margin-left: auto
 573   margin-right: auto
 574
 575 #downloadDiv
 576   display: inline-block
 577
 578 #controls
 579   user-select: none
 580   button
 581     border: none
 582     margin: 0
 583     padding-top: 5px
 584     padding-bottom: 5px
 585
 586 .in-autoplay
 587   background-color: #FACF8C
 588
 589 img.inline
 590   height: 22px
 591   padding-top: 5px
 592   @media screen and (max-width: 767px)
 593     height: 18px
 594
 595 #turnIndicator
 596   text-align: center
 597   font-weight: bold
 598
 599 #boardContainer
 600   float: left
 601 // TODO: later, maybe, allow movesList of variable width
 602 // or e.g. between 250 and 350px (but more complicated)
 603
 604 #movesList
 605   width: 280px
 606   float: left
 607
 608 @media screen and (max-width: 767px)
 609   #movesList
 610     width: 100%
 611     float: none
 612     clear: both
 613 </style>