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   .row
   9     #boardContainer.col-sm-12.col-md-9
  10       Board(:vr="vr" :last-move="lastMove" :analyze="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       #fenDiv(v-if="showFen && !!vr")
  20         p(@click="gotoFenContent") {{ vr.getFen() }}
  21       #pgnDiv
  22         a#download(href="#")
  23         button(@click="download") {{ st.tr["Download PGN"] }}
  24     .col-sm-12.col-md-3
  25       MoveList(v-if="showMoves" :score="game.score" :message="game.scoreMsg"
  26         :moves="moves" :cursor="cursor" @goto-move="gotoMove")
  27 </template>
  28
  29 <script>
  30 import Board from "@/components/Board.vue";
  31 import MoveList from "@/components/MoveList.vue";
  32 import { store } from "@/store";
  33 import { getSquareId } from "@/utils/squareId";
  34 import { getDate } from "@/utils/datetime";
  35
  36 export default {
  37   name: 'my-base-game',
  38   components: {
  39     Board,
  40     MoveList,
  41   },
  42   // "vr": VariantRules object, describing the game state + rules
  43   props: ["vr","game"],
  44   data: function() {
  45     return {
  46       st: store.state,
  47       // NOTE: all following variables must be reset at the beginning of a game
  48       endgameMessage: "",
  49       orientation: "w",
  50       score: "*", //'*' means 'unfinished'
  51       moves: [],
  52       cursor: -1, //index of the move just played
  53       lastMove: null,
  54     };
  55   },
  56   watch: {
  57     // game initial FEN changes when a new game starts
  58     "game.fenStart": function() {
  59       this.re_setVariables();
  60     },
  61     // Received a new move to play:
  62     "game.moveToPlay": function() {
  63       this.play(this.game.moveToPlay, "receive", this.game.vname=="Dark");
  64     },
  65   },
  66   computed: {
  67     showMoves: function() {
  68       return true;
  69       //return window.innerWidth >= 768;
  70     },
  71     showFen: function() {
  72       return this.game.vname != "Dark" || this.game.score != "*";
  73     },
  74     analyze: function() {
  75       return this.game.mode == "analyze" || this.game.score != "*";
  76     },
  77   },
  78   created: function() {
  79     if (!!this.game.fenStart)
  80       this.re_setVariables();
  81   },
  82   methods: {
  83     focusBg: function() {
  84       // TODO: small blue border appears...
  85       document.getElementById("baseGame").focus();
  86     },
  87     handleKeys: function(e) {
  88       if ([32,37,38,39,40].includes(e.keyCode))
  89         e.preventDefault();
  90       switch (e.keyCode)
  91       {
  92         case 37:
  93           this.undo();
  94           break;
  95         case 39:
  96           this.play();
  97           break;
  98         case 38:
  99           this.gotoBegin();
 100           break;
 101         case 40:
 102           this.gotoEnd();
 103           break;
 104         case 32:
 105           this.flip();
 106           break;
 107       }
 108     },
 109     re_setVariables: function() {
 110       this.endgameMessage = "";
 111       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
 112       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
 113       // Post-processing: decorate each move with color + current FEN:
 114       // (to be able to jump to any position quickly)
 115       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
 116       this.moves.forEach(move => {
 117         // NOTE: this is doing manually what play() function below achieve,
 118         // but in a lighter "fast-forward" way
 119         move.color = vr_tmp.turn;
 120         move.notation = vr_tmp.getNotation(move);
 121         vr_tmp.play(move);
 122         move.fen = vr_tmp.getFen();
 123       });
 124       if (this.game.fenStart.indexOf(" b ") >= 0 ||
 125         (this.moves.length > 0 && this.moves[0].color == "b"))
 126       {
 127         // 'end' is required for Board component to check lastMove for e.p.
 128         this.moves.unshift({color: "w", notation: "...", end: {x:-1,y:-1}});
 129       }
 130       const L = this.moves.length;
 131       this.cursor = L-1;
 132       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 133     },
 134     gotoFenContent: function(event) {
 135       const newUrl = "#/analyze/" + this.game.vname +
 136         "/?fen=" + event.target.innerText.replace(/ /g, "_");
 137       window.open(newUrl); //to open in a new tab
 138     },
 139     download: function() {
 140       const content = this.getPgn();
 141       // Prepare and trigger download link
 142       let downloadAnchor = document.getElementById("download");
 143       downloadAnchor.setAttribute("download", "game.pgn");
 144       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 145       downloadAnchor.click();
 146     },
 147     getPgn: function() {
 148       let pgn = "";
 149       pgn += '[Site "vchess.club"]\n';
 150       pgn += '[Variant "' + this.game.vname + '"]\n';
 151       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 152       pgn += '[White "' + this.game.players[0].name + '"]\n';
 153       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 154       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 155       pgn += '[Result "' + this.game.score + '"]\n\n';
 156       let counter = 1;
 157       let i = 0;
 158       while (i < this.moves.length)
 159       {
 160         pgn += (counter++) + ".";
 161         for (let color of ["w","b"])
 162         {
 163           let move = "";
 164           while (i < this.moves.length && this.moves[i].color == color)
 165             move += this.moves[i++].notation + ",";
 166           move = move.slice(0,-1); //remove last comma
 167           pgn += move + (i < this.moves.length ? " " : "");
 168         }
 169       }
 170       return pgn + "\n";
 171     },
 172     getScoreMessage: function(score) {
 173       let eogMessage = "Undefined";
 174       switch (score)
 175       {
 176         case "1-0":
 177           eogMessage = this.st.tr["White win"];
 178           break;
 179         case "0-1":
 180           eogMessage = this.st.tr["Black win"];
 181           break;
 182         case "1/2":
 183           eogMessage = this.st.tr["Draw"];
 184           break;
 185         case "?":
 186           eogMessage = this.st.tr["Unfinished"];
 187           break;
 188       }
 189       return eogMessage;
 190     },
 191     showEndgameMsg: function(message) {
 192       this.endgameMessage = message;
 193       let modalBox = document.getElementById("modalEog");
 194       modalBox.checked = true;
 195       setTimeout(() => { modalBox.checked = false; }, 2000);
 196     },
 197     animateMove: function(move) {
 198       let startSquare = document.getElementById(getSquareId(move.start));
 199       let endSquare = document.getElementById(getSquareId(move.end));
 200       let rectStart = startSquare.getBoundingClientRect();
 201       let rectEnd = endSquare.getBoundingClientRect();
 202       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 203       let movingPiece =
 204         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 205       // HACK for animation (with positive translate, image slides "under background")
 206       // Possible improvement: just alter squares on the piece's way...
 207       const squares = document.getElementsByClassName("board");
 208       for (let i=0; i<squares.length; i++)
 209       {
 210         let square = squares.item(i);
 211         if (square.id != getSquareId(move.start))
 212           square.style.zIndex = "-1";
 213       }
 214       movingPiece.style.transform = "translate(" + translation.x + "px," +
 215         translation.y + "px)";
 216       movingPiece.style.transitionDuration = "0.2s";
 217       movingPiece.style.zIndex = "3000";
 218       setTimeout( () => {
 219         for (let i=0; i<squares.length; i++)
 220           squares.item(i).style.zIndex = "auto";
 221         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 222         this.play(move);
 223       }, 250);
 224     },
 225     play: function(move, receive, noanimate) {
 226       const navigate = !move;
 227       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 228       // (except if we receive opponent's move, human or computer)
 229       if (!navigate && !this.analyze && !receive
 230         && this.cursor < this.moves.length-1)
 231       {
 232         return;
 233       }
 234       if (navigate)
 235       {
 236         if (this.cursor == this.moves.length-1)
 237           return; //no more moves
 238         move = this.moves[this.cursor+1];
 239       }
 240       if (!!receive && !noanimate) //opponent move, variant != "Dark"
 241       {
 242         if (this.cursor < this.moves.length-1)
 243           this.gotoEnd(); //required to play the move
 244         return this.animateMove(move);
 245       }
 246       if (!navigate)
 247       {
 248         move.color = this.vr.turn;
 249         move.notation = this.vr.getNotation(move);
 250       }
 251       // Not programmatic, or animation is over
 252       this.vr.play(move);
 253       this.cursor++;
 254       this.lastMove = move;
 255       if (this.st.settings.sound == 2)
 256         new Audio("/sounds/move.mp3").play().catch(err => {});
 257       if (!navigate)
 258       {
 259         move.fen = this.vr.getFen();
 260         if (this.game.score == "*" || this.analyze)
 261         {
 262           // Stack move on movesList at current cursor
 263           if (this.cursor == this.moves.length)
 264             this.moves.push(move);
 265           else
 266             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 267         }
 268       }
 269       if (!this.analyze)
 270         this.$emit("newmove", move); //post-processing (e.g. computer play)
 271       // Is opponent in check?
 272       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 273       const score = this.vr.getCurrentScore();
 274       if (score != "*")
 275       {
 276         const message = this.getScoreMessage(score);
 277         if (!this.analyze)
 278           this.$emit("gameover", score, message);
 279         else //just show score on screen (allow undo)
 280           this.showEndgameMsg(score + " . " + message);
 281       }
 282     },
 283     undo: function(move) {
 284       const navigate = !move;
 285       if (navigate)
 286       {
 287         if (this.cursor < 0)
 288           return; //no more moves
 289         move = this.moves[this.cursor];
 290       }
 291       this.vr.undo(move);
 292       this.cursor--;
 293       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 294       if (this.st.settings.sound == 2)
 295         new Audio("/sounds/undo.mp3").play().catch(err => {});
 296       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 297       if (!navigate)
 298         this.moves.pop();
 299     },
 300     gotoMove: function(index) {
 301       this.vr.re_init(this.moves[index].fen);
 302       this.cursor = index;
 303       this.lastMove = this.moves[index];
 304     },
 305     gotoBegin: function() {
 306       this.vr.re_init(this.game.fenStart);
 307       if (this.moves.length > 0 && this.moves[0].notation == "...")
 308       {
 309         this.cursor = 0;
 310         this.lastMove = this.moves[0];
 311       }
 312       else
 313       {
 314         this.cursor = -1;
 315         this.lastMove = null;
 316       }
 317     },
 318     gotoEnd: function() {
 319       this.gotoMove(this.moves.length-1);
 320     },
 321     flip: function() {
 322       this.orientation = V.GetNextCol(this.orientation);
 323     },
 324   },
 325 };
 326 </script>
 327
 328 <style lang="sass">
 329 #modal-eog+div .card
 330   overflow: hidden
 331 #pgnDiv, #fenDiv
 332   text-align: center
 333   margin-left: auto
 334   margin-right: auto
 335 @media screen and (min-width: 768px)
 336   #controls
 337     width: 400px
 338 @media screen and (max-width: 767px)
 339   .game
 340     width: 100%
 341 #controls
 342   margin-top: 10px
 343   button
 344     display: inline-block
 345     width: 20%
 346     margin: 0
 347 #boardContainer
 348   //margin-top: 5px
 349   >div
 350     margin-left: auto
 351     margin-right: auto
 352 </style>