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         :vr="vr"
  15         :last-move="lastMove"
  16         :analyze="game.mode=='analyze'"
  17         :score="game.score"
  18         :user-color="game.mycolor"
  19         :orientation="orientation"
  20         :vname="game.vname"
  21         :incheck="incheck"
  22         @play-move="play"
  23       )
  24       #turnIndicator(v-if="showTurn") {{ turn }}
  25       #controls
  26         button(@click="gotoBegin()")
  27           img.inline(src="/images/icons/fast-forward_rev.svg")
  28         button(@click="undo()")
  29           img.inline(src="/images/icons/play_rev.svg")
  30         button(v-if="canFlip" @click="flip()")
  31           img.inline(src="/images/icons/flip.svg")
  32         button(@click="play()")
  33           img.inline(src="/images/icons/play.svg")
  34         button(@click="gotoEnd()")
  35           img.inline(src="/images/icons/fast-forward.svg")
  36       #belowControls
  37         #downloadDiv(v-if="allowDownloadPGN")
  38           a#download(href="#")
  39           button(@click="download()") {{ st.tr["Download"] }} PGN
  40         button(
  41           v-if="canAnalyze"
  42           @click="analyzePosition()"
  43         )
  44           | {{ st.tr["Analyse"] }}
  45         // NOTE: variants pages already have a "Rules" link on top
  46         button(
  47           v-if="!$route.path.match('/variants/')"
  48           @click="showRules()"
  49         )
  50           | {{ st.tr["Rules"] }}
  51     #movesList
  52       MoveList(
  53         :show="showMoves"
  54         :score="game.score"
  55         :message="game.scoreMsg"
  56         :firstNum="firstMoveNumber"
  57         :moves="moves"
  58         :cursor="cursor"
  59         @goto-move="gotoMove"
  60       )
  61     .clearer
  62 </template>
  63
  64 <script>
  65 import Board from "@/components/Board.vue";
  66 import MoveList from "@/components/MoveList.vue";
  67 import { store } from "@/store";
  68 import { getSquareId } from "@/utils/squareId";
  69 import { getDate } from "@/utils/datetime";
  70 import { processModalClick } from "@/utils/modalClick";
  71 import { getScoreMessage } from "@/utils/scoring";
  72 import { getFullNotation } from "@/utils/notation";
  73 import { undoMove } from "@/utils/playUndo";
  74 export default {
  75   name: "my-base-game",
  76   components: {
  77     Board,
  78     MoveList
  79   },
  80   props: ["game"],
  81   data: function() {
  82     return {
  83       st: store.state,
  84       // NOTE: all following variables must be reset at the beginning of a game
  85       vr: null, //VariantRules object, game state
  86       endgameMessage: "",
  87       orientation: "w",
  88       score: "*", //'*' means 'unfinished'
  89       moves: [],
  90       // TODO: later, use subCursor to navigate intra-multimoves?
  91       cursor: -1, //index of the move just played
  92       lastMove: null,
  93       firstMoveNumber: 0, //for printing
  94       incheck: [], //for Board
  95       inMultimove: false
  96     };
  97   },
  98   watch: {
  99     // game initial FEN changes when a new game starts
 100     "game.fenStart": function() {
 101       this.re_setVariables();
 102     },
 103   },
 104   computed: {
 105     showMoves: function() {
 106       return this.game.score != "*"
 107         ? "all"
 108         : (this.vr ? this.vr.showMoves : "none");
 109     },
 110     showTurn: function() {
 111       return (
 112         this.game.score == '*' &&
 113         this.vr &&
 114         (this.vr.showMoves != "all" || !this.vr.canFlip)
 115       );
 116     },
 117     turn: function() {
 118       if (!this.vr)
 119         return "";
 120       if (this.vr.showMoves != "all")
 121         return this.st.tr[(this.vr.turn == 'w' ? "White" : "Black") + " to move"]
 122       // Cannot flip: racing king or circular chess
 123       return this.vr.movesCount == 0 && this.game.mycolor == "w"
 124         ? this.st.tr["It's your turn!"]
 125         : "";
 126     },
 127     canAnalyze: function() {
 128       return this.game.mode != "analyze" && this.vr && this.vr.canAnalyze;
 129     },
 130     canFlip: function() {
 131       return this.vr && this.vr.canFlip;
 132     },
 133     allowDownloadPGN: function() {
 134       return this.game.score != "*" || (this.vr && this.vr.showMoves == "all");
 135     }
 136   },
 137   created: function() {
 138     if (this.game.fenStart) this.re_setVariables();
 139   },
 140   mounted: function() {
 141     if (!("ontouchstart" in window)) {
 142       // Desktop browser:
 143       const baseGameDiv = document.getElementById("baseGame");
 144       baseGameDiv.tabIndex = 0;
 145       baseGameDiv.addEventListener("click", this.focusBg);
 146       baseGameDiv.addEventListener("keydown", this.handleKeys);
 147       baseGameDiv.addEventListener("wheel", this.handleScroll);
 148     }
 149     document.getElementById("eogDiv").addEventListener(
 150       "click",
 151       processModalClick);
 152   },
 153   methods: {
 154     focusBg: function() {
 155       document.getElementById("baseGame").focus();
 156     },
 157     handleKeys: function(e) {
 158       if ([32, 37, 38, 39, 40].includes(e.keyCode)) e.preventDefault();
 159       switch (e.keyCode) {
 160         case 37:
 161           this.undo();
 162           break;
 163         case 39:
 164           this.play();
 165           break;
 166         case 38:
 167           this.gotoBegin();
 168           break;
 169         case 40:
 170           this.gotoEnd();
 171           break;
 172         case 32:
 173           this.flip();
 174           break;
 175       }
 176     },
 177     handleScroll: function(e) {
 178       e.preventDefault();
 179       if (e.deltaY < 0) this.undo();
 180       else if (e.deltaY > 0) this.play();
 181     },
 182     showRules: function() {
 183       //this.$router.push("/variants/" + this.game.vname);
 184       window.open("#/variants/" + this.game.vname, "_blank"); //better
 185     },
 186     re_setVariables: function() {
 187       this.endgameMessage = "";
 188       // "w": default orientation for observed games
 189       this.orientation = this.game.mycolor || "w";
 190       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
 191       // Post-processing: decorate each move with notation and FEN
 192       this.vr = new V(this.game.fenStart);
 193       const parsedFen = V.ParseFen(this.game.fenStart);
 194       const firstMoveColor = parsedFen.turn;
 195       this.firstMoveNumber = Math.floor(parsedFen.movesCount / 2);
 196       this.moves.forEach(move => {
 197         // Strategy working also for multi-moves:
 198         if (!Array.isArray(move)) move = [move];
 199         move.forEach(m => {
 200           m.notation = this.vr.getNotation(m);
 201           this.vr.play(m);
 202         });
 203       });
 204       if (firstMoveColor == "b") {
 205         // 'start' & 'end' is required for Board component
 206         this.moves.unshift({
 207           notation: "...",
 208           start: { x: -1, y: -1 },
 209           end: { x: -1, y: -1 }
 210         });
 211       }
 212       this.positionCursorTo(this.moves.length - 1);
 213       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 214     },
 215     positionCursorTo: function(index) {
 216       this.cursor = index;
 217       // Caution: last move in moves array might be a multi-move
 218       if (index >= 0) {
 219         if (Array.isArray(this.moves[index])) {
 220           const L = this.moves[index].length;
 221           this.lastMove = this.moves[index][L - 1];
 222         } else {
 223           this.lastMove = this.moves[index];
 224         }
 225       }
 226       else
 227         this.lastMove = null;
 228     },
 229     analyzePosition: function() {
 230       const newUrl =
 231         "/analyse/" +
 232         this.game.vname +
 233         "/?fen=" +
 234         this.vr.getFen().replace(/ /g, "_");
 235       // Open in same tab in live games (against cheating)
 236       if (this.game.type == "live") this.$router.push(newUrl);
 237       else window.open("#" + newUrl);
 238     },
 239     download: function() {
 240       const content = this.getPgn();
 241       // Prepare and trigger download link
 242       let downloadAnchor = document.getElementById("download");
 243       downloadAnchor.setAttribute("download", "game.pgn");
 244       downloadAnchor.href =
 245         "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 246       downloadAnchor.click();
 247     },
 248     getPgn: function() {
 249       let pgn = "";
 250       pgn += '[Site "vchess.club"]\n';
 251       pgn += '[Variant "' + this.game.vname + '"]\n';
 252       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 253       pgn += '[White "' + this.game.players[0].name + '"]\n';
 254       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 255       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 256       pgn += '[Result "' + this.game.score + '"]\n\n';
 257       for (let i = 0; i < this.moves.length; i += 2) {
 258         pgn += (i/2+1) + "." + getFullNotation(this.moves[i]) + " ";
 259         if (i+1 < this.moves.length)
 260           pgn += getFullNotation(this.moves[i+1]) + " ";
 261       }
 262       return pgn + "\n";
 263     },
 264     showEndgameMsg: function(message) {
 265       this.endgameMessage = message;
 266       let modalBox = document.getElementById("modalEog");
 267       modalBox.checked = true;
 268       setTimeout(() => {
 269         modalBox.checked = false;
 270       }, 2000);
 271     },
 272     // Animate an elementary move
 273     animateMove: function(move, callback) {
 274       let startSquare = document.getElementById(getSquareId(move.start));
 275       let endSquare = document.getElementById(getSquareId(move.end));
 276       let rectStart = startSquare.getBoundingClientRect();
 277       let rectEnd = endSquare.getBoundingClientRect();
 278       let translation = {
 279         x: rectEnd.x - rectStart.x,
 280         y: rectEnd.y - rectStart.y
 281       };
 282       let movingPiece = document.querySelector(
 283         "#" + getSquareId(move.start) + " > img.piece"
 284       );
 285       // HACK for animation (with positive translate, image slides "under background")
 286       // Possible improvement: just alter squares on the piece's way...
 287       const squares = document.getElementsByClassName("board");
 288       for (let i = 0; i < squares.length; i++) {
 289         let square = squares.item(i);
 290         if (square.id != getSquareId(move.start)) square.style.zIndex = "-1";
 291       }
 292       movingPiece.style.transform =
 293         "translate(" + translation.x + "px," + translation.y + "px)";
 294       movingPiece.style.transitionDuration = "0.25s";
 295       movingPiece.style.zIndex = "3000";
 296       setTimeout(() => {
 297         for (let i = 0; i < squares.length; i++)
 298           squares.item(i).style.zIndex = "auto";
 299         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 300         callback();
 301       }, 250);
 302     },
 303     // For Analyse mode:
 304     emitFenIfAnalyze: function() {
 305       if (this.game.mode == "analyze") {
 306         this.$emit(
 307           "fenchange",
 308           this.lastMove ? this.lastMove.fen : this.game.fenStart
 309         );
 310       }
 311     },
 312     // "light": if gotoMove() or gotoEnd()
 313     // data: some custom data (addTime) to be re-emitted
 314     play: function(move, received, light, data) {
 315       const navigate = !move;
 316       const playSubmove = (smove) => {
 317         if (!navigate) smove.notation = this.vr.getNotation(smove);
 318         this.vr.play(smove);
 319         this.lastMove = smove;
 320         // Is opponent in check?
 321         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 322         if (!navigate) {
 323           if (!this.inMultimove) {
 324             if (this.cursor < this.moves.length - 1)
 325               this.moves = this.moves.slice(0, this.cursor + 1);
 326             this.moves.push(smove);
 327             this.inMultimove = true; //potentially
 328             this.cursor++;
 329           } else {
 330             // Already in the middle of a multi-move
 331             const L = this.moves.length;
 332             if (!Array.isArray(this.moves[L-1]))
 333               this.$set(this.moves, L-1, [this.moves[L-1], smove]);
 334             else
 335               this.$set(this.moves, L-1, this.moves.concat([smove]));
 336           }
 337         }
 338       };
 339       const playMove = () => {
 340         const animate = V.ShowMoves == "all" && received;
 341         if (!Array.isArray(move)) move = [move];
 342         let moveIdx = 0;
 343         let self = this;
 344         const initurn = this.vr.turn;
 345         (function executeMove() {
 346           const smove = move[moveIdx++];
 347           if (animate) {
 348             self.animateMove(smove, () => {
 349               playSubmove(smove);
 350               if (moveIdx < move.length)
 351                 setTimeout(executeMove, 500);
 352               else afterMove(smove, initurn);
 353             });
 354           } else {
 355             playSubmove(smove);
 356             if (moveIdx < move.length) executeMove();
 357             else afterMove(smove, initurn);
 358           }
 359         })();
 360       };
 361       const afterMove = (smove, initurn) => {
 362         if (this.vr.turn != initurn) {
 363           // Turn has changed: move is complete
 364           if (!smove.fen) {
 365             // NOTE: only FEN of last sub-move is required (thus setting it here)
 366             smove.fen = this.vr.getFen();
 367             this.emitFenIfAnalyze();
 368           }
 369           this.inMultimove = false;
 370           const score = this.vr.getCurrentScore();
 371           if (score != "*") {
 372             const message = getScoreMessage(score);
 373             if (!navigate && this.game.mode != "analyze")
 374               this.$emit("gameover", score, message);
 375             else if (this.game.mode == "analyze")
 376               // Just show score on screen (allow undo)
 377               this.showEndgameMsg(score + " . " + this.st.tr[message]);
 378           }
 379           if (!navigate && this.game.mode != "analyze") {
 380             const L = this.moves.length;
 381             // Post-processing (e.g. computer play)
 382             this.$emit("newmove", this.moves[L-1], data);
 383           }
 384         }
 385       };
 386       // NOTE: navigate and received are mutually exclusive
 387       if (navigate) {
 388         // The move to navigate to is necessarily full:
 389         if (this.cursor == this.moves.length - 1) return; //no more moves
 390         move = this.moves[this.cursor + 1];
 391         if (light) {
 392           // Just play the move, nothing else:
 393           if (!Array.isArray(move)) move = [move];
 394           for (let i=0; i < move.length; i++) this.vr.play(move[i]);
 395         }
 396         else {
 397           playMove();
 398           this.emitFenIfAnalyze();
 399         }
 400         this.cursor++;
 401         return;
 402       }
 403       // Forbid playing outside analyze mode, except if move is received.
 404       // Sufficient condition because Board already knows which turn it is.
 405       if (
 406         this.game.mode != "analyze" &&
 407         !received &&
 408         (this.game.score != "*" || this.cursor < this.moves.length - 1)
 409       ) {
 410         return;
 411       }
 412       // To play a received move, cursor must be at the end of the game:
 413       if (received && this.cursor < this.moves.length - 1)
 414         this.gotoEnd();
 415       playMove();
 416     },
 417     cancelCurrentMultimove: function() {
 418       const L = this.moves.length;
 419       let move = this.moves[L-1];
 420       if (!Array.isArray(move)) move = [move];
 421       for (let i=move.length -1; i >= 0; i--) this.vr.undo(move[i]);
 422       this.moves.pop();
 423       this.cursor--;
 424       this.inMultimove = false;
 425     },
 426     cancelLastMove: function() {
 427       // The last played move was canceled (corr game)
 428       this.undo();
 429       this.moves.pop();
 430     },
 431     // "light": if gotoMove() or gotoBegin()
 432     undo: function(move, light) {
 433       if (this.inMultimove) {
 434         this.cancelCurrentMultimove();
 435         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 436       } else {
 437         if (!move) {
 438           if (this.cursor < 0) return; //no more moves
 439           move = this.moves[this.cursor];
 440         }
 441         // Caution; if multi-move, undo all submoves from last to first
 442         undoMove(move, this.vr);
 443         if (light) this.cursor--;
 444         else {
 445           this.positionCursorTo(this.cursor - 1);
 446           this.incheck = this.vr.getCheckSquares(this.vr.turn);
 447           this.emitFenIfAnalyze();
 448         }
 449       }
 450     },
 451     gotoMove: function(index) {
 452       if (this.inMultimove) this.cancelCurrentMultimove();
 453       if (index == this.cursor) return;
 454       if (index < this.cursor) {
 455         while (this.cursor > index)
 456           this.undo(null, null, "light");
 457       }
 458       else {
 459         // index > this.cursor)
 460         while (this.cursor < index)
 461           this.play(null, null, "light");
 462       }
 463       // NOTE: next line also re-assign cursor, but it's very light
 464       this.positionCursorTo(index);
 465       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 466       this.emitFenIfAnalyze();
 467     },
 468     gotoBegin: function() {
 469       if (this.inMultimove) this.cancelCurrentMultimove();
 470       while (this.cursor >= 0)
 471         this.undo(null, null, "light");
 472       if (this.moves.length > 0 && this.moves[0].notation == "...") {
 473         this.cursor = 0;
 474         this.lastMove = this.moves[0];
 475       } else {
 476         this.lastMove = null;
 477       }
 478       this.incheck = [];
 479       this.emitFenIfAnalyze();
 480     },
 481     gotoEnd: function() {
 482       if (this.cursor == this.moves.length - 1) return;
 483       this.gotoMove(this.moves.length - 1);
 484       this.emitFenIfAnalyze();
 485     },
 486     flip: function() {
 487       this.orientation = V.GetOppCol(this.orientation);
 488     }
 489   }
 490 };
 491 </script>
 492
 493 <style lang="sass" scoped>
 494 [type="checkbox"]#modalEog+div .card
 495   min-height: 45px
 496
 497 #baseGame
 498   width: 100%
 499   &:focus
 500     outline: none
 501
 502 #gameContainer
 503   margin-left: auto
 504   margin-right: auto
 505
 506 #downloadDiv
 507   display: inline-block
 508
 509 #controls
 510   margin: 0 auto
 511   text-align: center
 512   display: flex
 513   button
 514     display: inline-block
 515     width: 20%
 516     margin: 0
 517     img.inline
 518       height: 24px
 519       padding-top: 5px
 520     @media screen and (max-width: 767px)
 521       img.inline
 522         height: 18px
 523
 524 #turnIndicator
 525   text-align: center
 526   font-weight: bold
 527
 528 #belowControls
 529   border-top: 1px solid #2f4f4f
 530   text-align: center
 531   margin: 0 auto
 532   & > #downloadDiv
 533     margin: 0
 534     & > button
 535       margin: 0
 536   & > button
 537     border-left: 1px solid #2f4f4f
 538     margin: 0
 539
 540 #boardContainer
 541   float: left
 542 // TODO: later, maybe, allow movesList of variable width
 543 // or e.g. between 250 and 350px (but more complicated)
 544
 545 #movesList
 546   width: 280px
 547   float: left
 548
 549 @media screen and (max-width: 767px)
 550   #movesList
 551     width: 100%
 552     float: none
 553     clear: both
 554 </style>