client/src/components/BaseGame.vue

   1 <template lang="pug">
   2 div#baseGame(tabindex=-1 @click="() => focusBg()"
   3     @keydown="handleKeys" @wheel="handleScroll")
   4   input#modalEog.modal(type="checkbox")
   5   div(role="dialog" data-checkbox="modalEog" aria-labelledby="eogMessage")
   6     .card.smallpad.small-modal.text-center
   7       label.modal-close(for="modalEog")
   8       h3#eogMessage.section {{ endgameMessage }}
   9   #gameContainer
  10     #boardContainer
  11       Board(:vr="vr" :last-move="lastMove" :analyze="analyze"
  12         :user-color="game.mycolor" :orientation="orientation"
  13         :vname="game.vname" @play-move="play")
  14       #turnIndicator(v-if="game.vname=='Dark' && game.score=='*'")
  15         | {{ turn }}
  16       #controls
  17         button(@click="gotoBegin") <<
  18         button(@click="() => undo()") <
  19         button(@click="flip") &#8645;
  20         button(@click="() => play()") >
  21         button(@click="gotoEnd") >>
  22       #pgnDiv
  23         #downloadDiv(v-if="game.vname!='Dark' || game.score!='*'")
  24           a#download(href="#")
  25           button(@click="download") {{ st.tr["Download PGN"] }}
  26         button(v-if="game.vname!='Dark' && game.mode!='analyze'"
  27             @click="analyzePosition")
  28           | {{ st.tr["Analyze"] }}
  29         // NOTE: rather ugly hack to avoid showing twice "rules" link...
  30         button(v-if="!$route.path.match('/variants/')" @click="showRules")
  31           | {{ st.tr["Rules"] }}
  32     #movesList
  33       MoveList(v-if="showMoves" :score="game.score" :message="game.scoreMsg"
  34         :firstNum="firstMoveNumber" :moves="moves" :cursor="cursor"
  35         @goto-move="gotoMove")
  36     .clearer
  37 </template>
  38
  39 <script>
  40 import Board from "@/components/Board.vue";
  41 import MoveList from "@/components/MoveList.vue";
  42 import { store } from "@/store";
  43 import { getSquareId } from "@/utils/squareId";
  44 import { getDate } from "@/utils/datetime";
  45
  46 export default {
  47   name: 'my-base-game',
  48   components: {
  49     Board,
  50     MoveList,
  51   },
  52   // "vr": VariantRules object, describing the game state + rules
  53   props: ["vr","game"],
  54   data: function() {
  55     return {
  56       st: store.state,
  57       // NOTE: all following variables must be reset at the beginning of a game
  58       endgameMessage: "",
  59       orientation: "w",
  60       score: "*", //'*' means 'unfinished'
  61       moves: [],
  62       cursor: -1, //index of the move just played
  63       lastMove: null,
  64       firstMoveNumber: 0, //for printing
  65     };
  66   },
  67   watch: {
  68     // game initial FEN changes when a new game starts
  69     "game.fenStart": function() {
  70       this.re_setVariables();
  71     },
  72     // Received a new move to play:
  73     "game.moveToPlay": function(newMove) {
  74       if (!!newMove) //if stop + launch new game, get undefined move
  75         this.play(newMove, "receive");
  76     },
  77   },
  78   computed: {
  79     showMoves: function() {
  80       return this.game.vname != "Dark" || this.game.score != "*";
  81     },
  82     turn: function() {
  83       let color = "";
  84       const L = this.moves.length;
  85       if (L == 0 || this.moves[L-1].color == "b")
  86         color = "White";
  87       else //if (this.moves[L-1].color == "w")
  88         color = "Black";
  89       return color + " turn";
  90     },
  91     analyze: function() {
  92       return this.game.mode=="analyze" ||
  93         // From Board viewpoint, a finished Dark game == analyze (TODO: unclear)
  94         (this.game.vname == "Dark" && this.game.score != "*");
  95     },
  96   },
  97   created: function() {
  98     if (!!this.game.fenStart)
  99       this.re_setVariables();
 100   },
 101   mounted: function() {
 102     // Take full width on small screens:
 103     let boardSize = parseInt(localStorage.getItem("boardSize"));
 104     if (!boardSize)
 105     {
 106       boardSize = (window.innerWidth >= 768
 107         ? Math.min(600, 0.5*window.innerWidth) //heuristic...
 108         : window.innerWidth);
 109     }
 110     const movesWidth = (window.innerWidth >= 768 ? 280 : 0);
 111     document.getElementById("boardContainer").style.width = boardSize + "px";
 112     let gameContainer = document.getElementById("gameContainer");
 113     gameContainer.style.width = (boardSize + movesWidth) + "px";
 114   },
 115   methods: {
 116     focusBg: function() {
 117       // NOTE: small blue border appears...
 118       document.getElementById("baseGame").focus();
 119     },
 120     handleKeys: function(e) {
 121       if ([32,37,38,39,40].includes(e.keyCode))
 122         e.preventDefault();
 123       switch (e.keyCode)
 124       {
 125         case 37:
 126           this.undo();
 127           break;
 128         case 39:
 129           this.play();
 130           break;
 131         case 38:
 132           this.gotoBegin();
 133           break;
 134         case 40:
 135           this.gotoEnd();
 136           break;
 137         case 32:
 138           this.flip();
 139           break;
 140       }
 141     },
 142     handleScroll: function(e) {
 143       // NOTE: since game.mode=="analyze" => no score, next condition is enough
 144       if (this.game.score != "*")
 145       {
 146         e.preventDefault();
 147         if (e.deltaY < 0)
 148           this.undo();
 149         else if (e.deltaY > 0)
 150           this.play();
 151       }
 152     },
 153     showRules: function() {
 154       //this.$router.push("/variants/" + this.game.vname);
 155       window.open("#/variants/" + this.game.vname, "_blank"); //better
 156     },
 157     re_setVariables: function() {
 158       this.endgameMessage = "";
 159       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
 160       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
 161       // Post-processing: decorate each move with color + current FEN:
 162       // (to be able to jump to any position quickly)
 163       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
 164       this.firstMoveNumber =
 165         Math.floor(V.ParseFen(this.game.fenStart).movesCount / 2);
 166       this.moves.forEach(move => {
 167         // NOTE: this is doing manually what play() function below achieve,
 168         // but in a lighter "fast-forward" way
 169         move.color = vr_tmp.turn;
 170         move.notation = vr_tmp.getNotation(move);
 171         vr_tmp.play(move);
 172         move.fen = vr_tmp.getFen();
 173       });
 174       if (this.game.fenStart.indexOf(" b ") >= 0 ||
 175         (this.moves.length > 0 && this.moves[0].color == "b"))
 176       {
 177         // 'end' is required for Board component to check lastMove for e.p.
 178         this.moves.unshift({color: "w", notation: "...", end: {x:-1,y:-1}});
 179       }
 180       const L = this.moves.length;
 181       this.cursor = L-1;
 182       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 183     },
 184     analyzePosition: function() {
 185       const newUrl = "/analyze/" + this.game.vname +
 186         "/?fen=" + this.vr.getFen().replace(/ /g, "_");
 187       if (this.game.type == "live")
 188         this.$router.push(newUrl); //open in same tab: against cheating...
 189       else
 190         window.open("#" + newUrl); //open in a new tab: more comfortable
 191     },
 192     download: function() {
 193       const content = this.getPgn();
 194       // Prepare and trigger download link
 195       let downloadAnchor = document.getElementById("download");
 196       downloadAnchor.setAttribute("download", "game.pgn");
 197       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 198       downloadAnchor.click();
 199     },
 200     getPgn: function() {
 201       let pgn = "";
 202       pgn += '[Site "vchess.club"]\n';
 203       pgn += '[Variant "' + this.game.vname + '"]\n';
 204       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 205       pgn += '[White "' + this.game.players[0].name + '"]\n';
 206       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 207       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 208       pgn += '[Result "' + this.game.score + '"]\n\n';
 209       let counter = 1;
 210       let i = 0;
 211       while (i < this.moves.length)
 212       {
 213         pgn += (counter++) + ".";
 214         for (let color of ["w","b"])
 215         {
 216           let move = "";
 217           while (i < this.moves.length && this.moves[i].color == color)
 218             move += this.moves[i++].notation + ",";
 219           move = move.slice(0,-1); //remove last comma
 220           pgn += move + (i < this.moves.length ? " " : "");
 221         }
 222       }
 223       return pgn + "\n";
 224     },
 225     getScoreMessage: function(score) {
 226       let eogMessage = "Undefined";
 227       switch (score)
 228       {
 229         case "1-0":
 230           eogMessage = this.st.tr["White win"];
 231           break;
 232         case "0-1":
 233           eogMessage = this.st.tr["Black win"];
 234           break;
 235         case "1/2":
 236           eogMessage = this.st.tr["Draw"];
 237           break;
 238         case "?":
 239           eogMessage = this.st.tr["Unfinished"];
 240           break;
 241       }
 242       return eogMessage;
 243     },
 244     showEndgameMsg: function(message) {
 245       this.endgameMessage = message;
 246       let modalBox = document.getElementById("modalEog");
 247       modalBox.checked = true;
 248       setTimeout(() => { modalBox.checked = false; }, 2000);
 249     },
 250     animateMove: function(move, callback) {
 251       let startSquare = document.getElementById(getSquareId(move.start));
 252       let endSquare = document.getElementById(getSquareId(move.end));
 253       let rectStart = startSquare.getBoundingClientRect();
 254       let rectEnd = endSquare.getBoundingClientRect();
 255       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 256       let movingPiece =
 257         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 258       // HACK for animation (with positive translate, image slides "under background")
 259       // Possible improvement: just alter squares on the piece's way...
 260       const squares = document.getElementsByClassName("board");
 261       for (let i=0; i<squares.length; i++)
 262       {
 263         let square = squares.item(i);
 264         if (square.id != getSquareId(move.start))
 265           square.style.zIndex = "-1";
 266       }
 267       movingPiece.style.transform = "translate(" + translation.x + "px," +
 268         translation.y + "px)";
 269       movingPiece.style.transitionDuration = "0.2s";
 270       movingPiece.style.zIndex = "3000";
 271       setTimeout( () => {
 272         for (let i=0; i<squares.length; i++)
 273           squares.item(i).style.zIndex = "auto";
 274         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 275         callback();
 276       }, 250);
 277     },
 278     play: function(move, receive) {
 279       // NOTE: navigate and receive are mutually exclusive
 280       const navigate = !move;
 281       // Forbid playing outside analyze mode, except if move is received.
 282       // Sufficient condition because Board already knows which turn it is.
 283       if (!navigate && this.game.mode!="analyze" && !receive
 284         && (this.game.score != "*" || this.cursor < this.moves.length-1))
 285       {
 286         return;
 287       }
 288       const doPlayMove = () => {
 289         if (!!receive && this.cursor < this.moves.length-1)
 290           this.gotoEnd(); //required to play the move
 291         if (navigate)
 292         {
 293           if (this.cursor == this.moves.length-1)
 294             return; //no more moves
 295           move = this.moves[this.cursor+1];
 296         }
 297         else
 298         {
 299           move.color = this.vr.turn;
 300           move.notation = this.vr.getNotation(move);
 301         }
 302         this.vr.play(move);
 303         this.cursor++;
 304         this.lastMove = move;
 305         if (this.st.settings.sound == 2)
 306           new Audio("/sounds/move.mp3").play().catch(err => {});
 307         if (!navigate)
 308         {
 309           move.fen = this.vr.getFen();
 310           // Stack move on movesList at current cursor
 311           if (this.cursor == this.moves.length)
 312             this.moves.push(move);
 313           else
 314             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 315         }
 316         // Is opponent in check?
 317         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 318         const score = this.vr.getCurrentScore();
 319         if (score != "*")
 320         {
 321           const message = this.getScoreMessage(score);
 322           if (this.game.mode != "analyze")
 323             this.$emit("gameover", score, message);
 324           else //just show score on screen (allow undo)
 325             this.showEndgameMsg(score + " . " + message);
 326         }
 327         if (!navigate && this.game.mode!="analyze")
 328           this.$emit("newmove", move); //post-processing (e.g. computer play)
 329       };
 330       if (!!receive && this.game.vname != "Dark")
 331         this.animateMove(move, doPlayMove);
 332       else
 333         doPlayMove();
 334     },
 335     undo: function(move) {
 336       const navigate = !move;
 337       if (navigate)
 338       {
 339         if (this.cursor < 0)
 340           return; //no more moves
 341         move = this.moves[this.cursor];
 342       }
 343       this.vr.undo(move);
 344       this.cursor--;
 345       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 346       if (this.st.settings.sound == 2)
 347         new Audio("/sounds/undo.mp3").play().catch(err => {});
 348       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 349       if (!navigate)
 350         this.moves.pop();
 351     },
 352     gotoMove: function(index) {
 353       this.vr.re_init(this.moves[index].fen);
 354       this.cursor = index;
 355       this.lastMove = this.moves[index];
 356     },
 357     gotoBegin: function() {
 358       if (this.cursor == -1)
 359         return;
 360       this.vr.re_init(this.game.fenStart);
 361       if (this.moves.length > 0 && this.moves[0].notation == "...")
 362       {
 363         this.cursor = 0;
 364         this.lastMove = this.moves[0];
 365       }
 366       else
 367       {
 368         this.cursor = -1;
 369         this.lastMove = null;
 370       }
 371     },
 372     gotoEnd: function() {
 373       if (this.cursor == this.moves.length - 1)
 374         return;
 375       this.gotoMove(this.moves.length-1);
 376     },
 377     flip: function() {
 378       this.orientation = V.GetOppCol(this.orientation);
 379     },
 380   },
 381 };
 382 </script>
 383
 384 <style lang="sass" scoped>
 385 #baseGame
 386   width: 100%
 387   &:focus
 388     outline: none
 389
 390 #gameContainer
 391   margin-left: auto
 392   margin-right: auto
 393
 394 #downloadDiv
 395   display: inline-block
 396
 397 #modal-eog+div .card
 398   overflow: hidden
 399 #controls
 400   margin-top: 10px
 401   margin-left: auto
 402   margin-right: auto
 403   button
 404     display: inline-block
 405     width: 20%
 406     margin: 0
 407 @media screen and (min-width: 768px)
 408   #controls
 409     max-width: 400px
 410 #turnIndicator
 411   text-align: center
 412 #pgnDiv
 413   text-align: center
 414   margin-left: auto
 415   margin-right: auto
 416 #boardContainer
 417   float: left
 418 // TODO: later, maybe, allow movesList of variable width
 419 // or e.g. between 250 and 350px (but more complicated)
 420 #movesList
 421   width: 280px
 422   float: left
 423 @media screen and (max-width: 767px)
 424   #movesList
 425     width: 100%
 426     float: none
 427     clear: both
 428 </style>