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="analyze"
  10       :user-color="gameInfo.mycolor" :orientation="orientation"
  11       :vname="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   // fenStart, players, mycolor
  43   props: ["vname","analyze","vr","gameInfo"],
  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     // gameInfo (immutable once set) changes when a new game starts
  58     "gameInfo": function() {
  59       // Reset all variables
  60       this.endgameMessage = "";
  61       this.orientation = this.gameInfo.mycolor || "w"; //default orientation for observed games
  62       this.score = this.gameInfo.score; //mutable (if initially "*")
  63       this.moves = this.gameInfo.moves; //TODO: this is mutable; make a copy instead
  64       const L = this.moves.length;
  65       this.cursor = L-1;
  66       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
  67     },
  68     analyze: function() {
  69       if (this.analyze)
  70       {
  71         // Switched to analyze mode: game is over
  72         this.endGame("*");
  73       }
  74     },
  75   },
  76   computed: {
  77     showMoves: function() {
  78       return true;
  79       //return window.innerWidth >= 768;
  80     },
  81     showFen: function() {
  82       return this.vname != "Dark" || this.score != "*";
  83     },
  84   },
  85   methods: {
  86     setEndgameMessage: function(score) {
  87       let eogMessage = "Undefined";
  88       switch (score)
  89       {
  90         case "1-0":
  91           eogMessage = translations["White win"];
  92           break;
  93         case "0-1":
  94           eogMessage = translations["Black win"];
  95           break;
  96         case "1/2":
  97           eogMessage = translations["Draw"];
  98           break;
  99         case "?":
 100           eogMessage = "Unfinished";
 101           break;
 102       }
 103       this.endgameMessage = eogMessage;
 104     },
 105     download: function() {
 106       const content = this.getPgn();
 107       // Prepare and trigger download link
 108       let downloadAnchor = document.getElementById("download");
 109       downloadAnchor.setAttribute("download", "game.pgn");
 110       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 111       downloadAnchor.click();
 112     },
 113     getPgn: function() {
 114       let pgn = "";
 115       pgn += '[Site "vchess.club"]\n';
 116       pgn += '[Variant "' + this.vname + '"]\n';
 117       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 118       pgn += '[White "' + this.gameInfo.players[0] + '"]\n';
 119       pgn += '[Black "' + this.gameInfo.players[1] + '"]\n';
 120       pgn += '[Fen "' + this.gameInfo.fenStart + '"]\n';
 121       pgn += '[Result "' + this.score + '"]\n\n';
 122       let counter = 1;
 123       let i = 0;
 124       while (i < this.moves.length)
 125       {
 126         pgn += (counter++) + ".";
 127         for (let color of ["w","b"])
 128         {
 129           let move = "";
 130           while (i < this.moves.length && this.moves[i].color == color)
 131             move += this.moves[i++].notation[0] + ",";
 132           move = move.slice(0,-1); //remove last comma
 133           pgn += move + (i < this.moves.length-1 ? " " : "");
 134         }
 135       }
 136       return pgn + "\n";
 137     },
 138     showScoreMsg: function(score) {
 139       this.setEndgameMessage(score);
 140       let modalBox = document.getElementById("modalEog");
 141       modalBox.checked = true;
 142       setTimeout(() => { modalBox.checked = false; }, 2000);
 143     },
 144     endGame: function(score) {
 145       this.score = score;
 146       this.showScoreMsg(score);
 147       this.$emit("game-over");
 148     },
 149     animateMove: function(move) {
 150       let startSquare = document.getElementById(getSquareId(move.start));
 151       let endSquare = document.getElementById(getSquareId(move.end));
 152       let rectStart = startSquare.getBoundingClientRect();
 153       let rectEnd = endSquare.getBoundingClientRect();
 154       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 155       let movingPiece =
 156         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 157       // HACK for animation (with positive translate, image slides "under background")
 158       // Possible improvement: just alter squares on the piece's way...
 159       const squares = document.getElementsByClassName("board");
 160       for (let i=0; i<squares.length; i++)
 161       {
 162         let square = squares.item(i);
 163         if (square.id != getSquareId(move.start))
 164           square.style.zIndex = "-1";
 165       }
 166       movingPiece.style.transform = "translate(" + translation.x + "px," +
 167         translation.y + "px)";
 168       movingPiece.style.transitionDuration = "0.2s";
 169       movingPiece.style.zIndex = "3000";
 170       setTimeout( () => {
 171         for (let i=0; i<squares.length; i++)
 172           squares.item(i).style.zIndex = "auto";
 173         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 174         this.play(move);
 175       }, 250);
 176     },
 177     play: function(move, programmatic) {
 178       let navigate = !move;
 179       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 180       // (except if we receive opponent's move, human or computer)
 181       if (!navigate && !this.analyze && !programmatic
 182         && this.cursor < this.moves.length-1)
 183       {
 184         return;
 185       }
 186       if (navigate)
 187       {
 188         if (this.cursor == this.moves.length-1)
 189           return; //no more moves
 190         move = this.moves[this.cursor+1];
 191       }
 192       if (!!programmatic) //computer or (remote) human opponent
 193       {
 194         if (this.cursor < this.moves.length-1)
 195           this.gotoEnd(); //required to play the move
 196         return this.animateMove(move);
 197       }
 198       // Not programmatic, or animation is over
 199       if (!move.notation)
 200         move.notation = this.vr.getNotation(move);
 201       if (!move.color)
 202         move.color = this.vr.turn;
 203       this.vr.play(move);
 204       this.cursor++;
 205       this.lastMove = move;
 206       if (!move.fen)
 207         move.fen = this.vr.getFen();
 208       if (this.st.settings.sound == 2)
 209         new Audio("/sounds/move.mp3").play().catch(err => {});
 210       if (!navigate && (this.score == "*" || this.analyze))
 211       {
 212         // Stack move on movesList at current cursor
 213         if (this.cursor == this.moves.length)
 214           this.moves.push(move);
 215         else
 216           this.moves = this.moves.slice(0,this.cursor).concat([move]);
 217       }
 218       // Is opponent in check?
 219       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 220       const score = this.vr.getCurrentScore();
 221       if (score != "*")
 222       {
 223         if (!this.analyze)
 224           this.endGame(score);
 225         else //just show score on screen (allow undo)
 226           this.showScoreMsg(score);
 227       }
 228       if (!this.analyze)
 229         this.$emit("newmove", move); //post-processing (e.g. computer play)
 230     },
 231     undo: function(move) {
 232       let navigate = !move;
 233       if (navigate)
 234       {
 235         if (this.cursor < 0)
 236           return; //no more moves
 237         move = this.moves[this.cursor];
 238       }
 239       this.vr.undo(move);
 240       this.cursor--;
 241       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 242       if (this.st.settings.sound == 2)
 243         new Audio("/sounds/undo.mp3").play().catch(err => {});
 244       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 245       if (!navigate)
 246         this.moves.pop();
 247     },
 248     gotoMove: function(index) {
 249       this.vr.re_init(this.moves[index].fen);
 250       this.cursor = index;
 251       this.lastMove = this.moves[index];
 252     },
 253     gotoBegin: function() {
 254       this.vr.re_init(this.fenStart);
 255       this.cursor = -1;
 256       this.lastMove = null;
 257     },
 258     gotoEnd: function() {
 259       this.gotoMove(this.moves.length-1);
 260     },
 261     flip: function() {
 262       this.orientation = V.GetNextCol(this.orientation);
 263     },
 264   },
 265 };
 266 </script>