client/src/components/BaseGame.vue

   1 <template lang="pug">
   2 div#baseGame(tabindex=-1 @click="() => focusBg()" @keydown="handleKeys")
   3   input#modalEog.modal(type="checkbox")
   4   div(role="dialog" aria-labelledby="eogMessage")
   5     .card.smallpad.small-modal.text-center
   6       label.modal-close(for="modalEog")
   7       h3#eogMessage.section {{ endgameMessage }}
   8   #gameContainer
   9     #boardContainer
  10       Board(:vr="vr" :last-move="lastMove" :analyze="game.mode=='analyze'"
  11         :user-color="game.mycolor" :orientation="orientation"
  12         :vname="game.vname" @play-move="play")
  13       #controls
  14         button(@click="gotoBegin") <<
  15         button(@click="() => undo()") <
  16         button(@click="flip") &#8645;
  17         button(@click="() => play()") >
  18         button(@click="gotoEnd") >>
  19       #pgnDiv
  20         a#download(href="#")
  21         button(@click="download") {{ st.tr["Download PGN"] }}
  22         button(v-if="game.mode!='analyze'" @click="analyzePosition")
  23           | {{ st.tr["Analyze"] }}
  24     #movesList
  25       MoveList(v-if="showMoves" :score="game.score" :message="game.scoreMsg"
  26         :firstNum="firstMoveNumber" :moves="moves" :cursor="cursor"
  27         @goto-move="gotoMove")
  28   // TODO: clearer required ?!
  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     const boardSize = localStorage.getItem("boardSize");
  82     if (!!boardSize)
  83       document.getElementById("boardContainer").style.width = boardSize + "px";
  84   },
  85   methods: {
  86     focusBg: function() {
  87       // TODO: small blue border appears...
  88       document.getElementById("baseGame").focus();
  89     },
  90     handleKeys: function(e) {
  91       if ([32,37,38,39,40].includes(e.keyCode))
  92         e.preventDefault();
  93       switch (e.keyCode)
  94       {
  95         case 37:
  96           this.undo();
  97           break;
  98         case 39:
  99           this.play();
 100           break;
 101         case 38:
 102           this.gotoBegin();
 103           break;
 104         case 40:
 105           this.gotoEnd();
 106           break;
 107         case 32:
 108           this.flip();
 109           break;
 110       }
 111     },
 112     re_setVariables: function() {
 113       this.endgameMessage = "";
 114       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
 115       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
 116       // Post-processing: decorate each move with color + current FEN:
 117       // (to be able to jump to any position quickly)
 118       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
 119       this.firstMoveNumber =
 120         Math.floor(V.ParseFen(this.game.fenStart).movesCount / 2);
 121       this.moves.forEach(move => {
 122         // NOTE: this is doing manually what play() function below achieve,
 123         // but in a lighter "fast-forward" way
 124         move.color = vr_tmp.turn;
 125         move.notation = vr_tmp.getNotation(move);
 126         vr_tmp.play(move);
 127         move.fen = vr_tmp.getFen();
 128       });
 129       if (this.game.fenStart.indexOf(" b ") >= 0 ||
 130         (this.moves.length > 0 && this.moves[0].color == "b"))
 131       {
 132         // 'end' is required for Board component to check lastMove for e.p.
 133         this.moves.unshift({color: "w", notation: "...", end: {x:-1,y:-1}});
 134       }
 135       const L = this.moves.length;
 136       this.cursor = L-1;
 137       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 138     },
 139     analyzePosition: function() {
 140       const newUrl = "/analyze/" + this.game.vname +
 141         "/?fen=" + this.vr.getFen().replace(/ /g, "_");
 142       //window.open("#" + newUrl); //to open in a new tab
 143       this.$router.push(newUrl); //better
 144     },
 145     download: function() {
 146       const content = this.getPgn();
 147       // Prepare and trigger download link
 148       let downloadAnchor = document.getElementById("download");
 149       downloadAnchor.setAttribute("download", "game.pgn");
 150       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 151       downloadAnchor.click();
 152     },
 153     getPgn: function() {
 154       let pgn = "";
 155       pgn += '[Site "vchess.club"]\n';
 156       pgn += '[Variant "' + this.game.vname + '"]\n';
 157       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 158       pgn += '[White "' + this.game.players[0].name + '"]\n';
 159       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 160       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 161       pgn += '[Result "' + this.game.score + '"]\n\n';
 162       let counter = 1;
 163       let i = 0;
 164       while (i < this.moves.length)
 165       {
 166         pgn += (counter++) + ".";
 167         for (let color of ["w","b"])
 168         {
 169           let move = "";
 170           while (i < this.moves.length && this.moves[i].color == color)
 171             move += this.moves[i++].notation + ",";
 172           move = move.slice(0,-1); //remove last comma
 173           pgn += move + (i < this.moves.length ? " " : "");
 174         }
 175       }
 176       return pgn + "\n";
 177     },
 178     getScoreMessage: function(score) {
 179       let eogMessage = "Undefined";
 180       switch (score)
 181       {
 182         case "1-0":
 183           eogMessage = this.st.tr["White win"];
 184           break;
 185         case "0-1":
 186           eogMessage = this.st.tr["Black win"];
 187           break;
 188         case "1/2":
 189           eogMessage = this.st.tr["Draw"];
 190           break;
 191         case "?":
 192           eogMessage = this.st.tr["Unfinished"];
 193           break;
 194       }
 195       return eogMessage;
 196     },
 197     showEndgameMsg: function(message) {
 198       this.endgameMessage = message;
 199       let modalBox = document.getElementById("modalEog");
 200       modalBox.checked = true;
 201       setTimeout(() => { modalBox.checked = false; }, 2000);
 202     },
 203     animateMove: function(move, callback) {
 204       let startSquare = document.getElementById(getSquareId(move.start));
 205       let endSquare = document.getElementById(getSquareId(move.end));
 206       let rectStart = startSquare.getBoundingClientRect();
 207       let rectEnd = endSquare.getBoundingClientRect();
 208       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 209       let movingPiece =
 210         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 211       // HACK for animation (with positive translate, image slides "under background")
 212       // Possible improvement: just alter squares on the piece's way...
 213       const squares = document.getElementsByClassName("board");
 214       for (let i=0; i<squares.length; i++)
 215       {
 216         let square = squares.item(i);
 217         if (square.id != getSquareId(move.start))
 218           square.style.zIndex = "-1";
 219       }
 220       movingPiece.style.transform = "translate(" + translation.x + "px," +
 221         translation.y + "px)";
 222       movingPiece.style.transitionDuration = "0.2s";
 223       movingPiece.style.zIndex = "3000";
 224       setTimeout( () => {
 225         for (let i=0; i<squares.length; i++)
 226           squares.item(i).style.zIndex = "auto";
 227         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 228         callback();
 229       }, 250);
 230     },
 231     play: function(move, receive) {
 232       // NOTE: navigate and receive are mutually exclusive
 233       const navigate = !move;
 234       // Forbid playing outside analyze mode, except if move is received.
 235       // Sufficient condition because Board already knows which turn it is.
 236       if (!navigate && this.game.mode!="analyze" && !receive
 237         && this.cursor < this.moves.length-1)
 238       {
 239         return;
 240       }
 241       const doPlayMove = () => {
 242         if (!!receive && this.cursor < this.moves.length-1)
 243           this.gotoEnd(); //required to play the move
 244         if (navigate)
 245         {
 246           if (this.cursor == this.moves.length-1)
 247             return; //no more moves
 248           move = this.moves[this.cursor+1];
 249         }
 250         else
 251         {
 252           move.color = this.vr.turn;
 253           move.notation = this.vr.getNotation(move);
 254         }
 255         this.vr.play(move);
 256         this.cursor++;
 257         this.lastMove = move;
 258         if (this.st.settings.sound == 2)
 259           new Audio("/sounds/move.mp3").play().catch(err => {});
 260         if (!navigate)
 261         {
 262           move.fen = this.vr.getFen();
 263           // Stack move on movesList at current cursor
 264           if (this.cursor == this.moves.length)
 265             this.moves.push(move);
 266           else
 267             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 268         }
 269         if (!navigate && this.game.mode != "analyze")
 270           this.$emit("newmove", move); //post-processing (e.g. computer play)
 271         // Is opponent in check?
 272         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 273         const score = this.vr.getCurrentScore();
 274         if (score != "*")
 275         {
 276           const message = this.getScoreMessage(score);
 277           if (this.game.mode != "analyze")
 278             this.$emit("gameover", score, message);
 279           else //just show score on screen (allow undo)
 280             this.showEndgameMsg(score + " . " + message);
 281         }
 282       };
 283       if (!!receive && this.game.vname != "Dark")
 284         this.animateMove(move, doPlayMove);
 285       else
 286         doPlayMove();
 287     },
 288     undo: function(move) {
 289       const navigate = !move;
 290       if (navigate)
 291       {
 292         if (this.cursor < 0)
 293           return; //no more moves
 294         move = this.moves[this.cursor];
 295       }
 296       this.vr.undo(move);
 297       this.cursor--;
 298       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 299       if (this.st.settings.sound == 2)
 300         new Audio("/sounds/undo.mp3").play().catch(err => {});
 301       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 302       if (!navigate)
 303         this.moves.pop();
 304     },
 305     gotoMove: function(index) {
 306       this.vr.re_init(this.moves[index].fen);
 307       this.cursor = index;
 308       this.lastMove = this.moves[index];
 309     },
 310     gotoBegin: function() {
 311       if (this.cursor == -1)
 312         return;
 313       this.vr.re_init(this.game.fenStart);
 314       if (this.moves.length > 0 && this.moves[0].notation == "...")
 315       {
 316         this.cursor = 0;
 317         this.lastMove = this.moves[0];
 318       }
 319       else
 320       {
 321         this.cursor = -1;
 322         this.lastMove = null;
 323       }
 324     },
 325     gotoEnd: function() {
 326       if (this.cursor == this.moves.length - 1)
 327         return;
 328       this.gotoMove(this.moves.length-1);
 329     },
 330     flip: function() {
 331       this.orientation = V.GetNextCol(this.orientation);
 332     },
 333   },
 334 };
 335 </script>
 336
 337 <style lang="sass">
 338 #baseGame
 339   width: 100%
 340
 341 #gameContainer
 342   margin-left: auto
 343   margin-right: auto
 344
 345 #modal-eog+div .card
 346   overflow: hidden
 347 @media screen and (min-width: 768px)
 348   #controls
 349     width: 400px
 350     margin-left: auto
 351     margin-right: auto
 352 #controls
 353   margin-top: 10px
 354   margin-left: auto
 355   margin-right: auto
 356   button
 357     display: inline-block
 358     width: 20%
 359     margin: 0
 360 #pgnDiv
 361   text-align: center
 362   margin-left: auto
 363   margin-right: auto
 364 #boardContainer
 365   float: left
 366 #movesList
 367   width: 280px
 368   float: left
 369
 370 .clearer
 371   clear: both
 372 </style>