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