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" :user-color="mycolor"
  10       :orientation="orientation" :vname="vname" @play-move="play")
  11     .button-group
  12       button(@click="() => play()") Play
  13       button(@click="() => undo()") Undo
  14       button(@click="flip") Flip
  15       button(@click="gotoBegin") GotoBegin
  16       button(@click="gotoEnd") GotoEnd
  17     #fenDiv.section-content(v-if="showFen && !!vr")
  18       p#fenString.text-center {{ vr.getFen() }}
  19     #pgnDiv.section-content
  20       a#download(href="#")
  21       .button-group
  22         button#downloadBtn(@click="download") {{ st.tr["Download PGN"] }}
  23         button Import game
  24     //MoveList(v-if="showMoves"
  25       :moves="moves" :cursor="cursor" @goto-move="gotoMove")
  26 </template>
  27
  28 <script>
  29 import Board from "@/components/Board.vue";
  30 //import MoveList from "@/components/MoveList.vue";
  31 import { store } from "@/store";
  32 import { getSquareId } from "@/utils/squareId";
  33
  34 export default {
  35   name: 'my-base-game',
  36   components: {
  37     Board,
  38     //MoveList,
  39   },
  40   // "vr": VariantRules object, describing the game state + rules
  41   // fenStart, players, mycolor
  42   props: ["vname","analyze","vr","gameInfo"],
  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       // TODO: score and moves could be also in gameInfo (when resuming)
  50       score: "*", //'*' means 'unfinished'
  51       moves: [],
  52       cursor: -1, //index of the move just played
  53       lastMove: null,
  54     };
  55   },
  56   watch: {
  57     // fenStart changes when a new game starts
  58     fenStart: function() {
  59       // Reset all variables
  60       this.endgameMessage = "";
  61       this.orientation = this.gameInfo.mycolor || "w";
  62       this.score = "*";
  63       this.moves = [];
  64       this.cursor = -1;
  65       this.lastMove = null;
  66     },
  67     analyze: function() {
  68       if (this.analyze)
  69       {
  70         // Switched to analyze mode: game is over
  71         this.endGame("*");
  72       }
  73     },
  74   },
  75   computed: {
  76     showMoves: function() {
  77       return true;
  78       //return window.innerWidth >= 768;
  79     },
  80     showFen: function() {
  81       return this.vname != "Dark" || this.score != "*";
  82     },
  83   },
  84   methods: {
  85     setEndgameMessage: function(score) {
  86       let eogMessage = "Undefined";
  87       switch (score)
  88       {
  89         case "1-0":
  90           eogMessage = translations["White win"];
  91           break;
  92         case "0-1":
  93           eogMessage = translations["Black win"];
  94           break;
  95         case "1/2":
  96           eogMessage = translations["Draw"];
  97           break;
  98         case "?":
  99           eogMessage = "Unfinished";
 100           break;
 101       }
 102       this.endgameMessage = eogMessage;
 103     },
 104     download: function() {
 105       const content = this.getPgn();
 106       // Prepare and trigger download link
 107       let downloadAnchor = document.getElementById("download");
 108       downloadAnchor.setAttribute("download", "game.pgn");
 109       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 110       downloadAnchor.click();
 111     },
 112     getPgn: function() {
 113       let pgn = "";
 114       pgn += '[Site "vchess.club"]\n';
 115       pgn += '[Variant "' + this.vname + '"]\n';
 116       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 117       pgn += '[White "' + this.game.players[0] + '"]\n';
 118       pgn += '[Black "' + this.game.players[1] + '"]\n';
 119       pgn += '[Fen "' + this.fenStart + '"]\n';
 120       pgn += '[Result "' + this.score + '"]\n\n';
 121       let counter = 1;
 122       let i = 0;
 123       while (i < this.moves.length)
 124       {
 125         pgn += (counter++) + ".";
 126         for (let color of ["w","b"])
 127         {
 128           let move = "";
 129           while (i < this.moves.length && this.moves[i].color == color)
 130             move += this.moves[i++].notation[0] + ",";
 131           move = move.slice(0,-1); //remove last comma
 132           pgn += move + (i < this.moves.length-1 ? " " : "");
 133         }
 134       }
 135       return pgn + "\n";
 136     },
 137     showScoreMsg: function(score) {
 138       this.setEndgameMessage(score);
 139       let modalBox = document.getElementById("modalEog");
 140       modalBox.checked = true;
 141       setTimeout(() => { modalBox.checked = false; }, 2000);
 142     },
 143     endGame: function(score) {
 144       this.score = score;
 145       this.showScoreMsg(score);
 146       this.$emit("game-over");
 147     },
 148     animateMove: function(move) {
 149       let startSquare = document.getElementById(getSquareId(move.start));
 150       let endSquare = document.getElementById(getSquareId(move.end));
 151       let rectStart = startSquare.getBoundingClientRect();
 152       let rectEnd = endSquare.getBoundingClientRect();
 153       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 154       let movingPiece =
 155         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 156       // HACK for animation (with positive translate, image slides "under background")
 157       // Possible improvement: just alter squares on the piece's way...
 158       const squares = document.getElementsByClassName("board");
 159       for (let i=0; i<squares.length; i++)
 160       {
 161         let square = squares.item(i);
 162         if (square.id != getSquareId(move.start))
 163           square.style.zIndex = "-1";
 164       }
 165       movingPiece.style.transform = "translate(" + translation.x + "px," +
 166         translation.y + "px)";
 167       movingPiece.style.transitionDuration = "0.2s";
 168       movingPiece.style.zIndex = "3000";
 169       setTimeout( () => {
 170         for (let i=0; i<squares.length; i++)
 171           squares.item(i).style.zIndex = "auto";
 172         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 173         this.play(move);
 174       }, 250);
 175     },
 176     play: function(move, programmatic) {
 177       let navigate = !move;
 178       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 179       // (except if we receive opponent's move, human or computer)
 180       if (!navigate && !this.analyze && !programmatic
 181         && this.cursor < this.moves.length-1)
 182       {
 183         return;
 184       }
 185       if (navigate)
 186       {
 187         if (this.cursor == this.moves.length-1)
 188           return; //no more moves
 189         move = this.moves[this.cursor+1];
 190       }
 191       if (!!programmatic) //computer or (remote) human opponent
 192       {
 193         if (this.cursor < this.moves.length-1)
 194           this.gotoEnd(); //required to play the move
 195         return this.animateMove(move);
 196       }
 197       // Not programmatic, or animation is over
 198       if (!move.notation)
 199         move.notation = this.vr.getNotation(move);
 200       if (!move.color)
 201         move.color = this.vr.turn;
 202       this.vr.play(move);
 203       this.cursor++;
 204       this.lastMove = move;
 205       if (!move.fen)
 206         move.fen = this.vr.getFen();
 207       if (this.st.settings.sound == 2)
 208         new Audio("/sounds/move.mp3").play().catch(err => {});
 209       if (!navigate && (this.score == "*" || this.analyze))
 210       {
 211         // Stack move on movesList at current cursor
 212         if (this.cursor == this.moves.length)
 213           this.moves.push(move);
 214         else
 215           this.moves = this.moves.slice(0,this.cursor).concat([move]);
 216       }
 217       // Is opponent in check?
 218       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 219       const score = this.vr.getCurrentScore();
 220       if (score != "*")
 221       {
 222         if (!this.analyze)
 223           this.endGame(score);
 224         else //just show score on screen (allow undo)
 225           this.showScoreMsg(score);
 226       }
 227       if (!this.analyze)
 228         this.$emit("newmove", move); //post-processing (e.g. computer play)
 229     },
 230     undo: function(move) {
 231       let navigate = !move;
 232       if (navigate)
 233       {
 234         if (this.cursor < 0)
 235           return; //no more moves
 236         move = this.moves[this.cursor];
 237       }
 238       this.vr.undo(move);
 239       this.cursor--;
 240       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 241       if (this.st.settings.sound == 2)
 242         new Audio("/sounds/undo.mp3").play().catch(err => {});
 243       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 244       if (!navigate)
 245         this.moves.pop();
 246     },
 247     gotoMove: function(index) {
 248       this.vr.re_init(this.moves[index].fen);
 249       this.cursor = index;
 250       this.lastMove = this.moves[index];
 251     },
 252     gotoBegin: function() {
 253       this.vr.re_init(this.fenStart);
 254       this.cursor = -1;
 255       this.lastMove = null;
 256     },
 257     gotoEnd: function() {
 258       this.gotoMove(this.moves.length-1);
 259     },
 260     flip: function() {
 261       this.orientation = V.GetNextCol(this.orientation);
 262     },
 263   },
 264 };
 265 </script>