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#eogDiv(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   input#modalAdjust.modal(type="checkbox")
  10   div#adjuster(role="dialog" data-checkbox="modalAdjust" aria-labelledby="labelAdjust")
  11     .card.smallpad.small-modal.text-center
  12       label.modal-close(for="modalAdjust")
  13       label#labelAdjust(for="boardSize") {{ st.tr["Board size"] }}
  14       input#boardSize.slider(type="range" min="0" max="100" value="50"
  15         @input="adjustBoard")
  16   #gameContainer
  17     #boardContainer
  18       Board(:vr="vr" :last-move="lastMove" :analyze="analyze"
  19         :user-color="game.mycolor" :orientation="orientation"
  20         :vname="game.vname" :incheck="incheck" @play-move="play")
  21       #turnIndicator(v-if="game.vname=='Dark' && game.score=='*'")
  22         | {{ turn }}
  23       #controls
  24         button(@click="gotoBegin") <<
  25         button(@click="() => undo()") <
  26         button(@click="flip") &#8645;
  27         button(@click="() => play()") >
  28         button(@click="gotoEnd") >>
  29       #pgnDiv
  30         #downloadDiv(v-if="game.vname!='Dark' || game.score!='*'")
  31           a#download(href="#")
  32           button(@click="download") {{ st.tr["Download PGN"] }}
  33         button(onClick="doClick('modalAdjust')") &#10530;
  34         button(v-if="game.vname!='Dark' && game.mode!='analyze'"
  35             @click="analyzePosition")
  36           | {{ st.tr["Analyze"] }}
  37         // NOTE: rather ugly hack to avoid showing twice "rules" link...
  38         button(v-if="!$route.path.match('/variants/')" @click="showRules")
  39           | {{ st.tr["Rules"] }}
  40     #movesList
  41       MoveList(v-if="showMoves" :score="game.score" :message="game.scoreMsg"
  42         :firstNum="firstMoveNumber" :moves="moves" :cursor="cursor"
  43         @goto-move="gotoMove")
  44     .clearer
  45 </template>
  46
  47 <script>
  48 import Board from "@/components/Board.vue";
  49 import MoveList from "@/components/MoveList.vue";
  50 import { store } from "@/store";
  51 import { getSquareId } from "@/utils/squareId";
  52 import { getDate } from "@/utils/datetime";
  53 import { processModalClick } from "@/utils/modalClick";
  54
  55 export default {
  56   name: 'my-base-game',
  57   components: {
  58     Board,
  59     MoveList,
  60   },
  61   // "vr": VariantRules object, describing the game state + rules
  62   props: ["vr","game"],
  63   data: function() {
  64     return {
  65       st: store.state,
  66       // NOTE: all following variables must be reset at the beginning of a game
  67       endgameMessage: "",
  68       orientation: "w",
  69       score: "*", //'*' means 'unfinished'
  70       moves: [],
  71       cursor: -1, //index of the move just played
  72       lastMove: null,
  73       firstMoveNumber: 0, //for printing
  74       incheck: [], //for Board
  75     };
  76   },
  77   watch: {
  78     // game initial FEN changes when a new game starts
  79     "game.fenStart": function() {
  80       this.re_setVariables();
  81     },
  82     // Received a new move to play:
  83     "game.moveToPlay": function(newMove) {
  84       if (!!newMove) //if stop + launch new game, get undefined move
  85         this.play(newMove, "receive");
  86     },
  87   },
  88   computed: {
  89     showMoves: function() {
  90       return this.game.vname != "Dark" || this.game.score != "*";
  91     },
  92     turn: function() {
  93       let color = "";
  94       const L = this.moves.length;
  95       if (L == 0 || this.moves[L-1].color == "b")
  96         color = "White";
  97       else //if (this.moves[L-1].color == "w")
  98         color = "Black";
  99       return this.st.tr[color + " to move"];
 100     },
 101     analyze: function() {
 102       return this.game.mode=="analyze" ||
 103         // From Board viewpoint, a finished Dark game == analyze (TODO: unclear)
 104         (this.game.vname == "Dark" && this.game.score != "*");
 105     },
 106   },
 107   created: function() {
 108     if (!!this.game.fenStart)
 109       this.re_setVariables();
 110   },
 111   mounted: function() {
 112     [document.getElementById("eogDiv"),document.getElementById("adjuster")]
 113       .forEach(elt => elt.addEventListener("click", processModalClick));
 114     // Take full width on small screens:
 115     let boardSize = parseInt(localStorage.getItem("boardSize"));
 116     if (!boardSize)
 117     {
 118       boardSize = (window.innerWidth >= 768
 119         ? Math.min(600, 0.5*window.innerWidth) //heuristic...
 120         : window.innerWidth);
 121     }
 122     const movesWidth = (window.innerWidth >= 768 ? 280 : 0);
 123     document.getElementById("boardContainer").style.width = boardSize + "px";
 124     let gameContainer = document.getElementById("gameContainer");
 125     gameContainer.style.width = (boardSize + movesWidth) + "px";
 126     // TODO: find the right formula here:
 127     //document.getElementById("boardSize").value = Math.floor(boardSize / 10);
 128     // timeout to avoid calling too many time the adjust method
 129     let timeoutLaunched = false;
 130     window.addEventListener("resize", (e) => {
 131       if (!timeoutLaunched)
 132       {
 133         timeoutLaunched = true;
 134         setTimeout( () => {
 135           this.adjustBoard();
 136           timeoutLaunched = false;
 137         }, 500);
 138       }
 139     });
 140   },
 141   methods: {
 142     focusBg: function() {
 143       // NOTE: small blue border appears...
 144       document.getElementById("baseGame").focus();
 145     },
 146     adjustBoard: function() {
 147       const boardContainer = document.getElementById("boardContainer");
 148       if (!boardContainer)
 149         return; //no board on page
 150       const k = document.getElementById("boardSize").value;
 151       const movesWidth = (window.innerWidth >= 768 ? 280 : 0);
 152       const minBoardWidth = 240; //TODO: these 240 and 280 are arbitrary...
 153       // Value of 0 is board min size; 100 is window.width [- movesWidth]
 154       const boardSize = minBoardWidth +
 155         k * (window.innerWidth - (movesWidth+minBoardWidth)) / 100;
 156       localStorage.setItem("boardSize", boardSize);
 157       boardContainer.style.width = boardSize + "px";
 158       document.getElementById("gameContainer").style.width =
 159         (boardSize + movesWidth) + "px";
 160     },
 161     handleKeys: function(e) {
 162       if ([32,37,38,39,40].includes(e.keyCode))
 163         e.preventDefault();
 164       switch (e.keyCode)
 165       {
 166         case 37:
 167           this.undo();
 168           break;
 169         case 39:
 170           this.play();
 171           break;
 172         case 38:
 173           this.gotoBegin();
 174           break;
 175         case 40:
 176           this.gotoEnd();
 177           break;
 178         case 32:
 179           this.flip();
 180           break;
 181       }
 182     },
 183     handleScroll: function(e) {
 184       // NOTE: since game.mode=="analyze" => no score, next condition is enough
 185       if (this.game.score != "*")
 186       {
 187         e.preventDefault();
 188         if (e.deltaY < 0)
 189           this.undo();
 190         else if (e.deltaY > 0)
 191           this.play();
 192       }
 193     },
 194     showRules: function() {
 195       //this.$router.push("/variants/" + this.game.vname);
 196       window.open("#/variants/" + this.game.vname, "_blank"); //better
 197     },
 198     re_setVariables: function() {
 199       this.endgameMessage = "";
 200       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
 201       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
 202       // Post-processing: decorate each move with color + current FEN:
 203       // (to be able to jump to any position quickly)
 204       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
 205       this.firstMoveNumber =
 206         Math.floor(V.ParseFen(this.game.fenStart).movesCount / 2);
 207       this.moves.forEach(move => {
 208         // NOTE: this is doing manually what play() function below achieve,
 209         // but in a lighter "fast-forward" way
 210         move.color = vr_tmp.turn;
 211         move.notation = vr_tmp.getNotation(move);
 212         vr_tmp.play(move);
 213         move.fen = vr_tmp.getFen();
 214       });
 215       if (this.game.fenStart.indexOf(" b ") >= 0 ||
 216         (this.moves.length > 0 && this.moves[0].color == "b"))
 217       {
 218         // 'end' is required for Board component to check lastMove for e.p.
 219         this.moves.unshift({color: "w", notation: "...", end: {x:-1,y:-1}});
 220       }
 221       const L = this.moves.length;
 222       this.cursor = L-1;
 223       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 224     },
 225     analyzePosition: function() {
 226       const newUrl = "/analyze/" + this.game.vname +
 227         "/?fen=" + this.vr.getFen().replace(/ /g, "_");
 228       if (this.game.type == "live")
 229         this.$router.push(newUrl); //open in same tab: against cheating...
 230       else
 231         window.open("#" + newUrl); //open in a new tab: more comfortable
 232     },
 233     download: function() {
 234       const content = this.getPgn();
 235       // Prepare and trigger download link
 236       let downloadAnchor = document.getElementById("download");
 237       downloadAnchor.setAttribute("download", "game.pgn");
 238       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 239       downloadAnchor.click();
 240     },
 241     getPgn: function() {
 242       let pgn = "";
 243       pgn += '[Site "vchess.club"]\n';
 244       pgn += '[Variant "' + this.game.vname + '"]\n';
 245       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 246       pgn += '[White "' + this.game.players[0].name + '"]\n';
 247       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 248       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 249       pgn += '[Result "' + this.game.score + '"]\n\n';
 250       let counter = 1;
 251       let i = 0;
 252       while (i < this.moves.length)
 253       {
 254         pgn += (counter++) + ".";
 255         for (let color of ["w","b"])
 256         {
 257           let move = "";
 258           while (i < this.moves.length && this.moves[i].color == color)
 259             move += this.moves[i++].notation + ",";
 260           move = move.slice(0,-1); //remove last comma
 261           pgn += move + (i < this.moves.length ? " " : "");
 262         }
 263       }
 264       return pgn + "\n";
 265     },
 266     getScoreMessage: function(score) {
 267       let eogMessage = "Undefined"; //not translated: unused
 268       switch (score)
 269       {
 270         case "1-0":
 271           eogMessage = this.st.tr["White win"];
 272           break;
 273         case "0-1":
 274           eogMessage = this.st.tr["Black win"];
 275           break;
 276         case "1/2":
 277           eogMessage = this.st.tr["Draw"];
 278           break;
 279         case "?":
 280           eogMessage = this.st.tr["Unknown"];
 281           break;
 282       }
 283       return eogMessage;
 284     },
 285     showEndgameMsg: function(message) {
 286       this.endgameMessage = message;
 287       let modalBox = document.getElementById("modalEog");
 288       modalBox.checked = true;
 289       setTimeout(() => { modalBox.checked = false; }, 2000);
 290     },
 291     animateMove: function(move, callback) {
 292       let startSquare = document.getElementById(getSquareId(move.start));
 293       let endSquare = document.getElementById(getSquareId(move.end));
 294       let rectStart = startSquare.getBoundingClientRect();
 295       let rectEnd = endSquare.getBoundingClientRect();
 296       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 297       let movingPiece =
 298         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 299       // HACK for animation (with positive translate, image slides "under background")
 300       // Possible improvement: just alter squares on the piece's way...
 301       const squares = document.getElementsByClassName("board");
 302       for (let i=0; i<squares.length; i++)
 303       {
 304         let square = squares.item(i);
 305         if (square.id != getSquareId(move.start))
 306           square.style.zIndex = "-1";
 307       }
 308       movingPiece.style.transform = "translate(" + translation.x + "px," +
 309         translation.y + "px)";
 310       movingPiece.style.transitionDuration = "0.2s";
 311       movingPiece.style.zIndex = "3000";
 312       setTimeout( () => {
 313         for (let i=0; i<squares.length; i++)
 314           squares.item(i).style.zIndex = "auto";
 315         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 316         callback();
 317       }, 250);
 318     },
 319     play: function(move, receive) {
 320       // NOTE: navigate and receive are mutually exclusive
 321       const navigate = !move;
 322       // Forbid playing outside analyze mode, except if move is received.
 323       // Sufficient condition because Board already knows which turn it is.
 324       if (!navigate && this.game.mode!="analyze" && !receive
 325         && (this.game.score != "*" || this.cursor < this.moves.length-1))
 326       {
 327         return;
 328       }
 329       const doPlayMove = () => {
 330         if (!!receive && this.cursor < this.moves.length-1)
 331           this.gotoEnd(); //required to play the move
 332         if (navigate)
 333         {
 334           if (this.cursor == this.moves.length-1)
 335             return; //no more moves
 336           move = this.moves[this.cursor+1];
 337         }
 338         else
 339         {
 340           move.color = this.vr.turn;
 341           move.notation = this.vr.getNotation(move);
 342         }
 343         this.vr.play(move);
 344         this.cursor++;
 345         this.lastMove = move;
 346         if (this.st.settings.sound == 2)
 347           new Audio("/sounds/move.mp3").play().catch(err => {});
 348         if (!navigate)
 349         {
 350           move.fen = this.vr.getFen();
 351           // Stack move on movesList at current cursor
 352           if (this.cursor == this.moves.length)
 353             this.moves.push(move);
 354           else
 355             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 356         }
 357         // Is opponent in check?
 358         this.incheck = this.vr.getCheckSquares(this.vr.turn);
 359         const score = this.vr.getCurrentScore();
 360         if (score != "*")
 361         {
 362           const message = this.getScoreMessage(score);
 363           if (this.game.mode != "analyze")
 364             this.$emit("gameover", score, message);
 365           else //just show score on screen (allow undo)
 366             this.showEndgameMsg(score + " . " + message);
 367         }
 368         if (!navigate && this.game.mode!="analyze")
 369           this.$emit("newmove", move); //post-processing (e.g. computer play)
 370       };
 371       if (!!receive && this.game.vname != "Dark")
 372         this.animateMove(move, doPlayMove);
 373       else
 374         doPlayMove();
 375     },
 376     undo: function(move) {
 377       const navigate = !move;
 378       if (navigate)
 379       {
 380         if (this.cursor < 0)
 381           return; //no more moves
 382         move = this.moves[this.cursor];
 383       }
 384       this.vr.undo(move);
 385       this.cursor--;
 386       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 387       if (this.st.settings.sound == 2)
 388         new Audio("/sounds/undo.mp3").play().catch(err => {});
 389       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 390       if (!navigate)
 391         this.moves.pop();
 392     },
 393     gotoMove: function(index) {
 394       this.vr.re_init(this.moves[index].fen);
 395       this.cursor = index;
 396       this.lastMove = this.moves[index];
 397     },
 398     gotoBegin: function() {
 399       if (this.cursor == -1)
 400         return;
 401       this.vr.re_init(this.game.fenStart);
 402       if (this.moves.length > 0 && this.moves[0].notation == "...")
 403       {
 404         this.cursor = 0;
 405         this.lastMove = this.moves[0];
 406       }
 407       else
 408       {
 409         this.cursor = -1;
 410         this.lastMove = null;
 411       }
 412     },
 413     gotoEnd: function() {
 414       if (this.cursor == this.moves.length - 1)
 415         return;
 416       this.gotoMove(this.moves.length-1);
 417     },
 418     flip: function() {
 419       this.orientation = V.GetOppCol(this.orientation);
 420     },
 421   },
 422 };
 423 </script>
 424
 425 <style lang="sass" scoped>
 426 #baseGame
 427   width: 100%
 428   &:focus
 429     outline: none
 430
 431 #gameContainer
 432   margin-left: auto
 433   margin-right: auto
 434
 435 #downloadDiv
 436   display: inline-block
 437
 438 #modal-eog+div .card
 439   overflow: hidden
 440 #controls
 441   margin-top: 10px
 442   margin-left: auto
 443   margin-right: auto
 444   button
 445     display: inline-block
 446     width: 20%
 447     margin: 0
 448 @media screen and (min-width: 768px)
 449   #controls
 450     max-width: 400px
 451 #turnIndicator
 452   text-align: center
 453 #pgnDiv
 454   text-align: center
 455   margin-left: auto
 456   margin-right: auto
 457 #boardContainer
 458   float: left
 459 // TODO: later, maybe, allow movesList of variable width
 460 // or e.g. between 250 and 350px (but more complicated)
 461 #movesList
 462   width: 280px
 463   float: left
 464 @media screen and (max-width: 767px)
 465   #movesList
 466     width: 100%
 467     float: none
 468     clear: both
 469 </style>