client/src/components/BaseGame.vue

   1 <template lang="pug">
   2 .row
   3   .col-sm-12.col-md-10.col-md-offset-1.col-lg-8.col-lg-offset-2
   4     input#modalEog.modal(type="checkbox")
   5     div(role="dialog" aria-labelledby="eogMessage")
   6       .card.smallpad.small-modal.text-center
   7         label.modal-close(for="modalEog")
   8         h3#eogMessage.section {{ endgameMessage }}
   9     Board(:vr="vr" :last-move="lastMove" :analyze="game.mode=='analyze'"
  10       :user-color="game.mycolor" :orientation="orientation"
  11       :vname="game.vname" @play-move="play")
  12     .button-group
  13       button(@click="() => play()") Play
  14       button(@click="() => undo()") Undo
  15       button(@click="flip") Flip
  16       button(@click="gotoBegin") GotoBegin
  17       button(@click="gotoEnd") GotoEnd
  18     #fenDiv.section-content(v-if="showFen && !!vr")
  19       p#fenString.text-center {{ vr.getFen() }}
  20     #pgnDiv.section-content
  21       a#download(href="#")
  22       .button-group
  23         button#downloadBtn(@click="download") {{ st.tr["Download PGN"] }}
  24         button Import game
  25     //MoveList(v-if="showMoves"
  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
  35 export default {
  36   name: 'my-base-game',
  37   components: {
  38     Board,
  39     //MoveList,
  40   },
  41   // "vr": VariantRules object, describing the game state + rules
  42   props: ["vr","game"],
  43   data: function() {
  44     return {
  45       st: store.state,
  46       // NOTE: all following variables must be reset at the beginning of a game
  47       endgameMessage: "",
  48       orientation: "w",
  49       score: "*", //'*' means 'unfinished'
  50       moves: [],
  51       cursor: -1, //index of the move just played
  52       lastMove: null,
  53     };
  54   },
  55   watch: {
  56     // game initial FEN changes when a new game starts
  57     "game.fenStart": function() {
  58       this.re_setVariables();
  59     },
  60   },
  61   computed: {
  62     showMoves: function() {
  63       return true;
  64       //return window.innerWidth >= 768;
  65     },
  66     showFen: function() {
  67       return this.game.vname != "Dark" || this.score != "*";
  68     },
  69     analyze: function() {
  70       return this.game.mode == "analyze";
  71     },
  72   },
  73   created: function() {
  74     if (!!this.game.fenStart)
  75       this.re_setVariables();
  76   },
  77   methods: {
  78     re_setVariables: function() {
  79       this.endgameMessage = "";
  80       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
  81       this.score = this.game.score || "*"; //mutable (if initially "*")
  82       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
  83       const L = this.moves.length;
  84       this.cursor = L-1;
  85       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
  86     },
  87     setEndgameMessage: function(score) {
  88       let eogMessage = "Undefined";
  89       switch (score)
  90       {
  91         case "1-0":
  92           eogMessage = translations["White win"];
  93           break;
  94         case "0-1":
  95           eogMessage = translations["Black win"];
  96           break;
  97         case "1/2":
  98           eogMessage = translations["Draw"];
  99           break;
 100         case "?":
 101           eogMessage = "Unfinished";
 102           break;
 103       }
 104       this.endgameMessage = eogMessage;
 105     },
 106     download: function() {
 107       const content = this.getPgn();
 108       // Prepare and trigger download link
 109       let downloadAnchor = document.getElementById("download");
 110       downloadAnchor.setAttribute("download", "game.pgn");
 111       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 112       downloadAnchor.click();
 113     },
 114     getPgn: function() {
 115       let pgn = "";
 116       pgn += '[Site "vchess.club"]\n';
 117       pgn += '[Variant "' + this.game.vname + '"]\n';
 118       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 119       pgn += '[White "' + this.game.players[0] + '"]\n';
 120       pgn += '[Black "' + this.game.players[1] + '"]\n';
 121       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 122       pgn += '[Result "' + this.score + '"]\n\n';
 123       let counter = 1;
 124       let i = 0;
 125       while (i < this.moves.length)
 126       {
 127         pgn += (counter++) + ".";
 128         for (let color of ["w","b"])
 129         {
 130           let move = "";
 131           while (i < this.moves.length && this.moves[i].color == color)
 132             move += this.moves[i++].notation[0] + ",";
 133           move = move.slice(0,-1); //remove last comma
 134           pgn += move + (i < this.moves.length-1 ? " " : "");
 135         }
 136       }
 137       return pgn + "\n";
 138     },
 139     showScoreMsg: function(score) {
 140       this.setEndgameMessage(score);
 141       let modalBox = document.getElementById("modalEog");
 142       modalBox.checked = true;
 143       setTimeout(() => { modalBox.checked = false; }, 2000);
 144     },
 145     endGame: function(score) {
 146       this.score = score;
 147       this.showScoreMsg(score);
 148       this.$emit("gameover"); //score not required (TODO?)
 149     },
 150     animateMove: function(move) {
 151       let startSquare = document.getElementById(getSquareId(move.start));
 152       let endSquare = document.getElementById(getSquareId(move.end));
 153       let rectStart = startSquare.getBoundingClientRect();
 154       let rectEnd = endSquare.getBoundingClientRect();
 155       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 156       let movingPiece =
 157         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 158       // HACK for animation (with positive translate, image slides "under background")
 159       // Possible improvement: just alter squares on the piece's way...
 160       const squares = document.getElementsByClassName("board");
 161       for (let i=0; i<squares.length; i++)
 162       {
 163         let square = squares.item(i);
 164         if (square.id != getSquareId(move.start))
 165           square.style.zIndex = "-1";
 166       }
 167       movingPiece.style.transform = "translate(" + translation.x + "px," +
 168         translation.y + "px)";
 169       movingPiece.style.transitionDuration = "0.2s";
 170       movingPiece.style.zIndex = "3000";
 171       setTimeout( () => {
 172         for (let i=0; i<squares.length; i++)
 173           squares.item(i).style.zIndex = "auto";
 174         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 175         this.play(move);
 176       }, 250);
 177     },
 178     play: function(move, programmatic) {
 179       let navigate = !move;
 180       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 181       // (except if we receive opponent's move, human or computer)
 182       if (!navigate && !this.analyze && !programmatic
 183         && this.cursor < this.moves.length-1)
 184       {
 185         return;
 186       }
 187       if (navigate)
 188       {
 189         if (this.cursor == this.moves.length-1)
 190           return; //no more moves
 191         move = this.moves[this.cursor+1];
 192       }
 193       if (!!programmatic) //computer or (remote) human opponent
 194       {
 195         if (this.cursor < this.moves.length-1)
 196           this.gotoEnd(); //required to play the move
 197         return this.animateMove(move);
 198       }
 199       // Not programmatic, or animation is over
 200       if (!move.notation)
 201         move.notation = this.vr.getNotation(move);
 202       if (!move.color)
 203         move.color = this.vr.turn;
 204       this.vr.play(move);
 205       this.cursor++;
 206       this.lastMove = move;
 207       if (!move.fen)
 208         move.fen = this.vr.getFen();
 209       if (this.st.settings.sound == 2)
 210         new Audio("/sounds/move.mp3").play().catch(err => {});
 211       if (!navigate && (this.score == "*" || this.analyze))
 212       {
 213         // Stack move on movesList at current cursor
 214         if (this.cursor == this.moves.length)
 215           this.moves.push(move);
 216         else
 217           this.moves = this.moves.slice(0,this.cursor).concat([move]);
 218       }
 219       // Is opponent in check?
 220       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 221       const score = this.vr.getCurrentScore();
 222       if (score != "*")
 223       {
 224         if (!this.analyze)
 225           this.endGame(score);
 226         else //just show score on screen (allow undo)
 227           this.showScoreMsg(score);
 228       }
 229       if (!this.analyze)
 230         this.$emit("newmove", move); //post-processing (e.g. computer play)
 231     },
 232     undo: function(move) {
 233       let navigate = !move;
 234       if (navigate)
 235       {
 236         if (this.cursor < 0)
 237           return; //no more moves
 238         move = this.moves[this.cursor];
 239       }
 240       this.vr.undo(move);
 241       this.cursor--;
 242       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 243       if (this.st.settings.sound == 2)
 244         new Audio("/sounds/undo.mp3").play().catch(err => {});
 245       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 246       if (!navigate)
 247         this.moves.pop();
 248     },
 249     gotoMove: function(index) {
 250       this.vr.re_init(this.moves[index].fen);
 251       this.cursor = index;
 252       this.lastMove = this.moves[index];
 253     },
 254     gotoBegin: function() {
 255       this.vr.re_init(this.game.fenStart);
 256       this.cursor = -1;
 257       this.lastMove = null;
 258     },
 259     gotoEnd: function() {
 260       this.gotoMove(this.moves.length-1);
 261     },
 262     flip: function() {
 263       this.orientation = V.GetNextCol(this.orientation);
 264     },
 265   },
 266 };
 267 </script>