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