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       this.moves.forEach(move => {
 182         // Strategy working also for multi-moves:
 183         if (!Array.isArray(move)) move = [move];
 184         move.forEach(m => {
 185           m.notation = this.vr.getNotation(m);
 186           this.vr.play(m);
 187         });
 188       });
 189       if (firstMoveColor == "b") {
 190         // 'start' & 'end' is required for Board component
 191         this.moves.unshift({
 192           notation: "...",
 193           start: { x: -1, y: -1 },
 194           end: { x: -1, y: -1 },
 195           fen: game.fenStart
 196         });
 197       }
 198       this.positionCursorTo(this.moves.length - 1);
 199       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 200     },
 201     positionCursorTo: function(index) {
 202       this.cursor = index;
 203       // Caution: last move in moves array might be a multi-move
 204       if (index >= 0) {
 205         if (Array.isArray(this.moves[index])) {
 206           const L = this.moves[index].length;
 207           this.lastMove = this.moves[index][L - 1];
 208         } else {
 209           this.lastMove = this.moves[index];
 210         }
 211       } else this.lastMove = null;
 212     },
 213     analyzePosition: function() {
 214       let newUrl =
 215         "/analyse/" +
 216         this.game.vname +
 217         "/?fen=" +
 218         this.vr.getFen().replace(/ /g, "_");
 219       if (this.game.mycolor)
 220         newUrl += "&side=" + this.game.mycolor;
 221       // Open in same tab in live games (against cheating)
 222       if (this.game.type == "live") this.$router.push(newUrl);
 223       else window.open("#" + newUrl);
 224     },
 225     download: function() {
 226       const content = this.getPgn();
 227       // Prepare and trigger download link
 228       let downloadAnchor = document.getElementById("download");
 229       downloadAnchor.setAttribute("download", "game.pgn");
 230       downloadAnchor.href =
 231         "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 232       downloadAnchor.click();
 233     },
 234     getPgn: function() {
 235       let pgn = "";
 236       pgn += '[Site "vchess.club"]\n';
 237       pgn += '[Variant "' + this.game.vname + '"]\n';
 238       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 239       pgn += '[White "' + this.game.players[0].name + '"]\n';
 240       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 241       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 242       pgn += '[Result "' + this.game.score + '"]\n\n';
 243       for (let i = 0; i < this.moves.length; i += 2) {
 244         pgn += (i/2+1) + "." + getFullNotation(this.moves[i]) + " ";
 245         if (i+1 < this.moves.length)
 246           pgn += getFullNotation(this.moves[i+1]) + " ";
 247       }
 248       return pgn + "\n";
 249     },
 250     showEndgameMsg: function(message) {
 251       this.endgameMessage = message;
 252       document.getElementById("modalEog").checked = true;
 253     },
 254     // Animate an elementary move
 255     animateMove: function(move, callback) {
 256       let startSquare = document.getElementById(getSquareId(move.start));
 257       if (!startSquare) return; //shouldn't happen but...
 258       let endSquare = document.getElementById(getSquareId(move.end));
 259       let rectStart = startSquare.getBoundingClientRect();
 260       let rectEnd = endSquare.getBoundingClientRect();
 261       let translation = {
 262         x: rectEnd.x - rectStart.x,
 263         y: rectEnd.y - rectStart.y
 264       };
 265       let movingPiece = document.querySelector(
 266         "#" + getSquareId(move.start) + " > img.piece"
 267       );
 268       // For some unknown reasons Opera get "movingPiece == null" error
 269       // TOOO: is it calling 'animate()' twice ? One extra time ?
 270       if (!movingPiece) return;
 271       // HACK for animation (with positive translate, image slides "under background")
 272       // Possible improvement: just alter squares on the piece's way...
 273       const squares = document.getElementsByClassName("board");
 274       for (let i = 0; i < squares.length; i++) {
 275         let square = squares.item(i);
 276         if (square.id != getSquareId(move.start)) square.style.zIndex = "-1";
 277       }
 278       movingPiece.style.transform =
 279         "translate(" + translation.x + "px," + translation.y + "px)";
 280       movingPiece.style.transitionDuration = "0.25s";
 281       movingPiece.style.zIndex = "3000";
 282       setTimeout(() => {
 283         for (let i = 0; i < squares.length; i++)
 284           squares.item(i).style.zIndex = "auto";
 285         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 286         callback();
 287       }, 250);
 288     },
 289     // For Analyse mode:
 290     emitFenIfAnalyze: function() {
 291       if (this.game.mode == "analyze") {
 292         this.$emit(
 293           "fenchange",
 294           this.lastMove ? this.lastMove.fen : this.game.fenStart
 295         );
 296       }
 297     },
 298     // "light": if gotoMove() or gotoEnd()
 299     play: function(move, received, light, noemit) {
 300       if (!!noemit) {
 301         if (this.inPlay) {
 302           // Received moves in observed games can arrive too fast:
 303           this.stackToPlay.unshift(move);
 304           return;
 305         }
 306         this.inPlay = true;
 307       }
 308       const navigate = !move;
 309       const playSubmove = (smove) => {
 310         if (!navigate) smove.notation = this.vr.getNotation(smove);
 311         this.vr.play(smove);
 312         // Is opponent in check?
 313         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 314         if (!navigate) {
 315           if (!this.inMultimove) {
 316             if (this.cursor < this.moves.length - 1)
 317               this.moves = this.moves.slice(0, this.cursor + 1);
 318             this.moves.push(smove);
 319             this.inMultimove = true; //potentially
 320             this.cursor++;
 321           } else {
 322             // Already in the middle of a multi-move
 323             const L = this.moves.length;
 324             if (!Array.isArray(this.moves[L-1]))
 325               this.$set(this.moves, L-1, [this.moves[L-1], smove]);
 326             else
 327               this.$set(this.moves, L-1, this.moves.concat([smove]));
 328           }
 329         }
 330       };
 331       const playMove = () => {
 332         const animate = V.ShowMoves == "all" && (received || navigate);
 333         if (!Array.isArray(move)) move = [move];
 334         let moveIdx = 0;
 335         let self = this;
 336         const initurn = this.vr.turn;
 337         (function executeMove() {
 338           const smove = move[moveIdx++];
 339           if (animate) {
 340             self.animateMove(smove, () => {
 341               playSubmove(smove);
 342               if (moveIdx < move.length)
 343                 setTimeout(executeMove, 500);
 344               else afterMove(smove, initurn);
 345             });
 346           } else {
 347             playSubmove(smove);
 348             if (moveIdx < move.length) executeMove();
 349             else afterMove(smove, initurn);
 350           }
 351         })();
 352       };
 353       const afterMove = (smove, initurn) => {
 354         if (this.vr.turn != initurn) {
 355           // Turn has changed: move is complete
 356           if (!smove.fen)
 357             // NOTE: only FEN of last sub-move is required (thus setting it here)
 358             smove.fen = this.vr.getFen();
 359           this.lastMove = smove;
 360           this.emitFenIfAnalyze();
 361           this.inMultimove = false;
 362           if (!noemit) {
 363             var score = this.vr.getCurrentScore();
 364             if (score != "*" && this.game.mode == "analyze") {
 365               const message = getScoreMessage(score);
 366               // Just show score on screen (allow undo)
 367               this.showEndgameMsg(score + " . " + this.st.tr[message]);
 368             }
 369           }
 370           if (!navigate && this.game.mode != "analyze") {
 371             const L = this.moves.length;
 372             if (!noemit)
 373               // Post-processing (e.g. computer play).
 374               // NOTE: always emit the score, even in unfinished,
 375               // to tell Game::processMove() that it's not a received move.
 376               this.$emit("newmove", this.moves[L-1], { score: score });
 377             else {
 378               this.inPlay = false;
 379               if (this.stackToPlay.length > 0)
 380                 // Move(s) arrived in-between
 381                 this.play(this.stackToPlay.pop(), received, light, noemit);
 382             }
 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           const minCursor =
 439             this.moves.length > 0 && this.moves[0].notation == "..."
 440               ? 1
 441               : 0;
 442           if (this.cursor < minCursor) return; //no more moves
 443           move = this.moves[this.cursor];
 444         }
 445         // Caution; if multi-move, undo all submoves from last to first
 446         undoMove(move, this.vr);
 447         if (light) this.cursor--;
 448         else {
 449           this.positionCursorTo(this.cursor - 1);
 450           this.incheck = this.vr.getCheckSquares(this.vr.turn);
 451           this.emitFenIfAnalyze();
 452         }
 453       }
 454     },
 455     gotoMove: function(index) {
 456       if (this.inMultimove) this.cancelCurrentMultimove();
 457       if (index == this.cursor) return;
 458       if (index < this.cursor) {
 459         while (this.cursor > index)
 460           this.undo(null, null, "light");
 461       }
 462       else {
 463         // index > this.cursor)
 464         while (this.cursor < index)
 465           this.play(null, null, "light");
 466       }
 467       // NOTE: next line also re-assign cursor, but it's very light
 468       this.positionCursorTo(index);
 469       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 470       this.emitFenIfAnalyze();
 471     },
 472     gotoBegin: function() {
 473       if (this.inMultimove) this.cancelCurrentMultimove();
 474       const minCursor =
 475         this.moves.length > 0 && this.moves[0].notation == "..."
 476           ? 1
 477           : 0;
 478       while (this.cursor >= minCursor) this.undo(null, null, "light");
 479       this.lastMove = (minCursor == 1 ? this.moves[0] : null);
 480       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 481       this.emitFenIfAnalyze();
 482     },
 483     gotoEnd: function() {
 484       if (this.cursor == this.moves.length - 1) return;
 485       this.gotoMove(this.moves.length - 1);
 486       this.emitFenIfAnalyze();
 487     },
 488     flip: function() {
 489       this.orientation = V.GetOppCol(this.orientation);
 490     }
 491   }
 492 };
 493 </script>
 494
 495 <style lang="sass" scoped>
 496 [type="checkbox"]#modalEog+div .card
 497   min-height: 45px
 498
 499 #baseGame
 500   width: 100%
 501   &:focus
 502     outline: none
 503
 504 #gameContainer
 505   margin-left: auto
 506   margin-right: auto
 507
 508 #downloadDiv
 509   display: inline-block
 510
 511 #controls
 512   user-select: none
 513   button
 514     border: none
 515     margin: 0
 516     padding-top: 5px
 517     padding-bottom: 5px
 518
 519 img.inline
 520   height: 24px
 521   padding-top: 5px
 522   @media screen and (max-width: 767px)
 523     height: 18px
 524
 525 #turnIndicator
 526   text-align: center
 527   font-weight: bold
 528
 529 #boardContainer
 530   float: left
 531 // TODO: later, maybe, allow movesList of variable width
 532 // or e.g. between 250 and 350px (but more complicated)
 533
 534 #movesList
 535   width: 280px
 536   float: left
 537
 538 @media screen and (max-width: 767px)
 539   #movesList
 540     width: 100%
 541     float: none
 542     clear: both
 543 </style>