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(@click="play()")
  34           img.inline(src="/images/icons/play.svg")
  35         button(@click="gotoEnd()")
  36           img.inline(src="/images/icons/fast-forward.svg")
  37     #movesList
  38       MoveList(
  39         :show="showMoves"
  40         :canAnalyze="canAnalyze"
  41         :canDownload="allowDownloadPGN"
  42         :score="game.score"
  43         :message="game.scoreMsg"
  44         :firstNum="firstMoveNumber"
  45         :moves="moves"
  46         :cursor="cursor"
  47         @download="download"
  48         @showrules="showRules"
  49         @analyze="analyzePosition"
  50         @goto-move="gotoMove"
  51       )
  52     .clearer
  53 </template>
  54
  55 <script>
  56 import Board from "@/components/Board.vue";
  57 import MoveList from "@/components/MoveList.vue";
  58 import { store } from "@/store";
  59 import { getSquareId } from "@/utils/squareId";
  60 import { getDate } from "@/utils/datetime";
  61 import { processModalClick } from "@/utils/modalClick";
  62 import { getScoreMessage } from "@/utils/scoring";
  63 import { getFullNotation } from "@/utils/notation";
  64 import { undoMove } from "@/utils/playUndo";
  65 export default {
  66   name: "my-base-game",
  67   components: {
  68     Board,
  69     MoveList
  70   },
  71   props: ["game"],
  72   data: function() {
  73     return {
  74       st: store.state,
  75       // NOTE: all following variables must be reset at the beginning of a game
  76       vr: null, //VariantRules object, game state
  77       endgameMessage: "",
  78       orientation: "w",
  79       score: "*", //'*' means 'unfinished'
  80       moves: [],
  81       cursor: -1, //index of the move just played
  82       lastMove: null,
  83       firstMoveNumber: 0, //for printing
  84       incheck: [], //for Board
  85       inMultimove: false,
  86       inPlay: false,
  87       stackToPlay: []
  88     };
  89   },
  90   computed: {
  91     showMoves: function() {
  92       return this.game.score != "*"
  93         ? "all"
  94         : (this.vr ? this.vr.showMoves : "none");
  95     },
  96     showTurn: function() {
  97       return (
  98         this.game.score == '*' &&
  99         this.vr &&
 100         (this.vr.showMoves != "all" || !this.vr.canFlip)
 101       );
 102     },
 103     turn: function() {
 104       if (!this.vr)
 105         return "";
 106       if (this.vr.showMoves != "all")
 107         return this.st.tr[(this.vr.turn == 'w' ? "White" : "Black") + " to move"]
 108       // Cannot flip: racing king or circular chess
 109       return this.vr.movesCount == 0 && this.game.mycolor == "w"
 110         ? this.st.tr["It's your turn!"]
 111         : "";
 112     },
 113     canAnalyze: function() {
 114       return this.game.mode != "analyze" && this.vr && this.vr.canAnalyze;
 115     },
 116     canFlip: function() {
 117       return this.vr && this.vr.canFlip;
 118     },
 119     allowDownloadPGN: function() {
 120       return this.game.score != "*" || (this.vr && this.vr.showMoves == "all");
 121     }
 122   },
 123   created: function() {
 124     if (!!this.game.fenStart) this.re_setVariables();
 125   },
 126   mounted: function() {
 127     if (!("ontouchstart" in window)) {
 128       // Desktop browser:
 129       const baseGameDiv = document.getElementById("baseGame");
 130       baseGameDiv.tabIndex = 0;
 131       baseGameDiv.addEventListener("click", this.focusBg);
 132       baseGameDiv.addEventListener("keydown", this.handleKeys);
 133       baseGameDiv.addEventListener("wheel", this.handleScroll);
 134     }
 135     document.getElementById("eogDiv")
 136       .addEventListener("click", processModalClick);
 137   },
 138   methods: {
 139     focusBg: function() {
 140       document.getElementById("baseGame").focus();
 141     },
 142     handleKeys: function(e) {
 143       if ([32, 37, 38, 39, 40].includes(e.keyCode)) e.preventDefault();
 144       switch (e.keyCode) {
 145         case 37:
 146           this.undo();
 147           break;
 148         case 39:
 149           this.play();
 150           break;
 151         case 38:
 152           this.gotoBegin();
 153           break;
 154         case 40:
 155           this.gotoEnd();
 156           break;
 157         case 32:
 158           this.flip();
 159           break;
 160       }
 161     },
 162     handleScroll: function(e) {
 163       e.preventDefault();
 164       if (e.deltaY < 0) this.undo();
 165       else if (e.deltaY > 0) this.play();
 166     },
 167     showRules: function() {
 168       //this.$router.push("/variants/" + this.game.vname);
 169       window.open("#/variants/" + this.game.vname, "_blank"); //better
 170     },
 171     re_setVariables: function(game) {
 172       if (!game) game = this.game; //in case of...
 173       this.endgameMessage = "";
 174       // "w": default orientation for observed games
 175       this.orientation = game.mycolor || "w";
 176       this.moves = JSON.parse(JSON.stringify(game.moves || []));
 177       // Post-processing: decorate each move with notation and FEN
 178       this.vr = new V(game.fenStart);
 179       const parsedFen = V.ParseFen(game.fenStart);
 180       const firstMoveColor = parsedFen.turn;
 181       this.firstMoveNumber = Math.floor(parsedFen.movesCount / 2);
 182       let L = this.moves.length;
 183       this.moves.forEach(move => {
 184         // Strategy working also for multi-moves:
 185         if (!Array.isArray(move)) move = [move];
 186         move.forEach((m,idx) => {
 187           m.notation = this.vr.getNotation(m);
 188           this.vr.play(m);
 189           if (idx < L - 1 && this.vr.getCheckSquares(this.vr.turn).length > 0)
 190             m.notation += "+";
 191         });
 192       });
 193       if (firstMoveColor == "b") {
 194         // 'start' & 'end' is required for Board component
 195         this.moves.unshift({
 196           notation: "...",
 197           start: { x: -1, y: -1 },
 198           end: { x: -1, y: -1 },
 199           fen: game.fenStart
 200         });
 201         L++;
 202       }
 203       this.positionCursorTo(this.moves.length - 1);
 204       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 205       const score = this.vr.getCurrentScore();
 206       if (["1-0","0-1"].includes(score))
 207         this.moves[L - 1].notation += "#";
 208       else if (this.vr.getCheckSquares(this.vr.turn).length > 0)
 209         this.moves[L - 1].notation += "+";
 210     },
 211     positionCursorTo: function(index) {
 212       this.cursor = index;
 213       // Caution: last move in moves array might be a multi-move
 214       if (index >= 0) {
 215         if (Array.isArray(this.moves[index])) {
 216           const L = this.moves[index].length;
 217           this.lastMove = this.moves[index][L - 1];
 218         } else {
 219           this.lastMove = this.moves[index];
 220         }
 221       } else this.lastMove = null;
 222     },
 223     analyzePosition: function() {
 224       let newUrl =
 225         "/analyse/" +
 226         this.game.vname +
 227         "/?fen=" +
 228         this.vr.getFen().replace(/ /g, "_");
 229       if (this.game.mycolor)
 230         newUrl += "&side=" + this.game.mycolor;
 231       // Open in same tab in live games (against cheating)
 232       if (this.game.type == "live") this.$router.push(newUrl);
 233       else window.open("#" + newUrl);
 234     },
 235     download: function() {
 236       const content = this.getPgn();
 237       // Prepare and trigger download link
 238       let downloadAnchor = document.getElementById("download");
 239       downloadAnchor.setAttribute("download", "game.pgn");
 240       downloadAnchor.href =
 241         "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 242       downloadAnchor.click();
 243     },
 244     getPgn: function() {
 245       let pgn = "";
 246       pgn += '[Site "vchess.club"]\n';
 247       pgn += '[Variant "' + this.game.vname + '"]\n';
 248       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 249       pgn += '[White "' + this.game.players[0].name + '"]\n';
 250       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 251       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 252       pgn += '[Result "' + this.game.score + '"]\n\n';
 253       for (let i = 0; i < this.moves.length; i += 2) {
 254         pgn += (i/2+1) + "." + getFullNotation(this.moves[i]) + " ";
 255         if (i+1 < this.moves.length)
 256           pgn += getFullNotation(this.moves[i+1]) + " ";
 257       }
 258       return pgn + "\n";
 259     },
 260     showEndgameMsg: function(message) {
 261       this.endgameMessage = message;
 262       document.getElementById("modalEog").checked = true;
 263     },
 264     // Animate an elementary move
 265     animateMove: function(move, callback) {
 266       let startSquare = document.getElementById(getSquareId(move.start));
 267       if (!startSquare) return; //shouldn't happen but...
 268       let endSquare = document.getElementById(getSquareId(move.end));
 269       let rectStart = startSquare.getBoundingClientRect();
 270       let rectEnd = endSquare.getBoundingClientRect();
 271       let translation = {
 272         x: rectEnd.x - rectStart.x,
 273         y: rectEnd.y - rectStart.y
 274       };
 275       let movingPiece = document.querySelector(
 276         "#" + getSquareId(move.start) + " > img.piece"
 277       );
 278       // For some unknown reasons Opera get "movingPiece == null" error
 279       // TOOO: is it calling 'animate()' twice ? One extra time ?
 280       if (!movingPiece) return;
 281       // HACK for animation (with positive translate, image slides "under background")
 282       // Possible improvement: just alter squares on the piece's way...
 283       const squares = document.getElementsByClassName("board");
 284       for (let i = 0; i < squares.length; i++) {
 285         let square = squares.item(i);
 286         if (square.id != getSquareId(move.start)) square.style.zIndex = "-1";
 287       }
 288       movingPiece.style.transform =
 289         "translate(" + translation.x + "px," + translation.y + "px)";
 290       movingPiece.style.transitionDuration = "0.25s";
 291       movingPiece.style.zIndex = "3000";
 292       setTimeout(() => {
 293         for (let i = 0; i < squares.length; i++)
 294           squares.item(i).style.zIndex = "auto";
 295         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 296         callback();
 297       }, 250);
 298     },
 299     // For Analyse mode:
 300     emitFenIfAnalyze: function() {
 301       if (this.game.mode == "analyze") {
 302         this.$emit(
 303           "fenchange",
 304           !!this.lastMove ? this.lastMove.fen : this.game.fenStart
 305         );
 306       }
 307     },
 308     // "light": if gotoMove() or gotoEnd()
 309     play: function(move, received, light, noemit) {
 310       // Freeze while choices are shown:
 311       if (this.$refs["board"].choices.length > 0) return;
 312       if (!!noemit) {
 313         if (this.inPlay) {
 314           // Received moves in observed games can arrive too fast:
 315           this.stackToPlay.unshift(move);
 316           return;
 317         }
 318         this.inPlay = true;
 319       }
 320       const navigate = !move;
 321       const playSubmove = (smove) => {
 322         smove.notation = this.vr.getNotation(smove);
 323         this.vr.play(smove);
 324         this.lastMove = smove;
 325         if (!this.inMultimove) {
 326           if (this.cursor < this.moves.length - 1)
 327             this.moves = this.moves.slice(0, this.cursor + 1);
 328           this.moves.push(smove);
 329           this.inMultimove = true; //potentially
 330           this.cursor++;
 331         } else {
 332           // Already in the middle of a multi-move
 333           const L = this.moves.length;
 334           if (!Array.isArray(this.moves[L-1]))
 335             this.$set(this.moves, L-1, [this.moves[L-1], smove]);
 336           else
 337             this.$set(this.moves, L-1, this.moves.concat([smove]));
 338         }
 339       };
 340       const playMove = () => {
 341         const animate = (V.ShowMoves == "all" && !!received);
 342         if (!Array.isArray(move)) move = [move];
 343         let moveIdx = 0;
 344         let self = this;
 345         const initurn = this.vr.turn;
 346         (function executeMove() {
 347           const smove = move[moveIdx++];
 348           if (animate) {
 349             self.animateMove(smove, () => {
 350               playSubmove(smove);
 351               if (moveIdx < move.length)
 352                 setTimeout(executeMove, 500);
 353               else afterMove(smove, initurn);
 354             });
 355           } else {
 356             playSubmove(smove);
 357             if (moveIdx < move.length) executeMove();
 358             else afterMove(smove, initurn);
 359           }
 360         })();
 361       };
 362       const computeScore = () => {
 363         const score = this.vr.getCurrentScore();
 364         if (!navigate) {
 365           if (["1-0","0-1"].includes(score))
 366             this.lastMove.notation += "#";
 367           else if (this.vr.getCheckSquares(this.vr.turn).length > 0)
 368             this.lastMove.notation += "+";
 369         }
 370         if (score != "*" && this.game.mode == "analyze") {
 371           const message = getScoreMessage(score);
 372           // Just show score on screen (allow undo)
 373           this.showEndgameMsg(score + " . " + this.st.tr[message]);
 374         }
 375         return score;
 376       };
 377       const afterMove = (smove, initurn) => {
 378         if (this.vr.turn != initurn) {
 379           // Turn has changed: move is complete
 380           if (!smove.fen)
 381             // NOTE: only FEN of last sub-move is required (thus setting it here)
 382             smove.fen = this.vr.getFen();
 383           // Is opponent in check?
 384           this.incheck = this.vr.getCheckSquares(this.vr.turn);
 385           this.emitFenIfAnalyze();
 386           this.inMultimove = false;
 387           this.score = computeScore();
 388           if (this.game.mode != "analyze") {
 389             if (!noemit) {
 390               // Post-processing (e.g. computer play).
 391               const L = this.moves.length;
 392               // NOTE: always emit the score, even in unfinished,
 393               // to tell Game::processMove() that it's not a received move.
 394               this.$emit("newmove", this.moves[L-1], { score: this.score });
 395             } else {
 396               this.inPlay = false;
 397               if (this.stackToPlay.length > 0)
 398                 // Move(s) arrived in-between
 399                 this.play(this.stackToPlay.pop(), received, light, noemit);
 400             }
 401           }
 402         }
 403       };
 404       // NOTE: navigate and received are mutually exclusive
 405       if (navigate) {
 406         // The move to navigate to is necessarily full:
 407         if (this.cursor == this.moves.length - 1) return; //no more moves
 408         move = this.moves[this.cursor + 1];
 409         // Just play the move:
 410         if (!Array.isArray(move)) move = [move];
 411         for (let i=0; i < move.length; i++) this.vr.play(move[i]);
 412         if (!light) {
 413           this.lastMove = move[move.length-1];
 414           this.incheck = this.vr.getCheckSquares(this.vr.turn);
 415           this.score = computeScore();
 416           this.emitFenIfAnalyze();
 417         }
 418         this.cursor++;
 419         return;
 420       }
 421       // Forbid playing outside analyze mode, except if move is received.
 422       // Sufficient condition because Board already knows which turn it is.
 423       if (
 424         this.game.mode != "analyze" &&
 425         !received &&
 426         (this.game.score != "*" || this.cursor < this.moves.length - 1)
 427       ) {
 428         return;
 429       }
 430       // To play a received move, cursor must be at the end of the game:
 431       if (received && this.cursor < this.moves.length - 1)
 432         this.gotoEnd();
 433       playMove();
 434     },
 435     cancelCurrentMultimove: function() {
 436       const L = this.moves.length;
 437       let move = this.moves[L-1];
 438       if (!Array.isArray(move)) move = [move];
 439       for (let i=move.length -1; i >= 0; i--) this.vr.undo(move[i]);
 440       this.moves.pop();
 441       this.cursor--;
 442       this.inMultimove = false;
 443     },
 444     cancelLastMove: function() {
 445       // The last played move was canceled (corr game)
 446       this.undo();
 447       this.moves.pop();
 448     },
 449     // "light": if gotoMove() or gotoBegin()
 450     undo: function(move, light) {
 451       // Freeze while choices are shown:
 452       if (this.$refs["board"].choices.length > 0) return;
 453       if (this.inMultimove) {
 454         this.cancelCurrentMultimove();
 455         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 456       } else {
 457         if (!move) {
 458           const minCursor =
 459             this.moves.length > 0 && this.moves[0].notation == "..."
 460               ? 1
 461               : 0;
 462           if (this.cursor < minCursor) return; //no more moves
 463           move = this.moves[this.cursor];
 464         }
 465         undoMove(move, this.vr);
 466         if (light) this.cursor--;
 467         else {
 468           this.positionCursorTo(this.cursor - 1);
 469           this.incheck = this.vr.getCheckSquares(this.vr.turn);
 470           this.emitFenIfAnalyze();
 471         }
 472       }
 473     },
 474     gotoMove: function(index) {
 475       if (this.$refs["board"].choices.length > 0) return;
 476       if (this.inMultimove) this.cancelCurrentMultimove();
 477       if (index == this.cursor) return;
 478       if (index < this.cursor) {
 479         while (this.cursor > index)
 480           this.undo(null, null, "light");
 481       }
 482       else {
 483         // index > this.cursor)
 484         while (this.cursor < index)
 485           this.play(null, null, "light");
 486       }
 487       // NOTE: next line also re-assign cursor, but it's very light
 488       this.positionCursorTo(index);
 489       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 490       this.emitFenIfAnalyze();
 491     },
 492     gotoBegin: function() {
 493       if (this.$refs["board"].choices.length > 0) return;
 494       if (this.inMultimove) this.cancelCurrentMultimove();
 495       const minCursor =
 496         this.moves.length > 0 && this.moves[0].notation == "..."
 497           ? 1
 498           : 0;
 499       while (this.cursor >= minCursor) this.undo(null, null, "light");
 500       this.lastMove = (minCursor == 1 ? this.moves[0] : null);
 501       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 502       this.emitFenIfAnalyze();
 503     },
 504     gotoEnd: function() {
 505       if (this.$refs["board"].choices.length > 0) return;
 506       if (this.cursor == this.moves.length - 1) return;
 507       this.gotoMove(this.moves.length - 1);
 508       this.emitFenIfAnalyze();
 509     },
 510     flip: function() {
 511       if (this.$refs["board"].choices.length > 0) return;
 512       this.orientation = V.GetOppCol(this.orientation);
 513     }
 514   }
 515 };
 516 </script>
 517
 518 <style lang="sass" scoped>
 519 [type="checkbox"]#modalEog+div .card
 520   min-height: 45px
 521
 522 #baseGame
 523   width: 100%
 524   &:focus
 525     outline: none
 526
 527 #gameContainer
 528   margin-left: auto
 529   margin-right: auto
 530
 531 #downloadDiv
 532   display: inline-block
 533
 534 #controls
 535   user-select: none
 536   button
 537     border: none
 538     margin: 0
 539     padding-top: 5px
 540     padding-bottom: 5px
 541
 542 img.inline
 543   height: 24px
 544   padding-top: 5px
 545   @media screen and (max-width: 767px)
 546     height: 18px
 547
 548 #turnIndicator
 549   text-align: center
 550   font-weight: bold
 551
 552 #boardContainer
 553   float: left
 554 // TODO: later, maybe, allow movesList of variable width
 555 // or e.g. between 250 and 350px (but more complicated)
 556
 557 #movesList
 558   width: 280px
 559   float: left
 560
 561 @media screen and (max-width: 767px)
 562   #movesList
 563     width: 100%
 564     float: none
 565     clear: both
 566 </style>