client/src/components/BaseGame.vue

   1 <template lang="pug">
   2 div
   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     .col-sm-12.col-md-9.col-lg-8
  10       Board(:vr="vr" :last-move="lastMove" :analyze="analyze"
  11         :user-color="game.mycolor" :orientation="orientation"
  12         :vname="game.vname" @play-move="play")
  13       .button-group
  14         button(@click="() => play()") Play
  15         button(@click="() => undo()") Undo
  16         button(@click="flip") Flip
  17         button(@click="gotoBegin") GotoBegin
  18         button(@click="gotoEnd") 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.col-lg-4
  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 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       gameHasEnded: false, //to avoid showing end message twice
  55     };
  56   },
  57   watch: {
  58     // game initial FEN changes when a new game starts
  59     "game.fenStart": function() {
  60       this.re_setVariables();
  61     },
  62     // Received a new move to play:
  63     "game.moveToPlay": function() {
  64       this.play(this.game.moveToPlay, "receive", this.game.vname=="Dark");
  65     },
  66     "game.score": function(score) {
  67       if (!this.gameHasEnded && score != "*")
  68       {
  69         // "false" says "don't bubble up": the parent already knows
  70         this.endGame(score, this.game.scoreMsg, false);
  71       }
  72     },
  73   },
  74   computed: {
  75     showMoves: function() {
  76       return true;
  77       //return window.innerWidth >= 768;
  78     },
  79     showFen: function() {
  80       return this.game.vname != "Dark" || this.score != "*";
  81     },
  82     analyze: function() {
  83       return this.game.mode == "analyze" || this.score != "*";
  84     },
  85   },
  86   created: function() {
  87     if (!!this.game.fenStart)
  88       this.re_setVariables();
  89   },
  90   methods: {
  91     re_setVariables: function() {
  92       this.endgameMessage = "";
  93       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
  94       this.score = this.game.score || "*"; //mutable (if initially "*")
  95       this.gameHasEnded = (this.score != "*");
  96       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
  97       // Post-processing: decorate each move with color + current FEN:
  98       // (to be able to jump to any position quickly)
  99       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
 100       this.moves.forEach(move => {
 101         // NOTE: this is doing manually what play() function below achieve,
 102         // but in a lighter "fast-forward" way
 103         move.color = vr_tmp.turn;
 104         move.notation = vr_tmp.getNotation(move);
 105         vr_tmp.play(move);
 106         move.fen = vr_tmp.getFen();
 107       });
 108       if (this.game.fenStart.indexOf(" b ") >= 0 ||
 109         (this.moves.length > 0 && this.moves[0].color == "b"))
 110       {
 111         // 'end' is required for Board component to check lastMove for e.p.
 112         this.moves.unshift({color: "w", notation: "...", end: {x:-1,y:-1}});
 113       }
 114       const L = this.moves.length;
 115       this.cursor = L-1;
 116       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 117     },
 118     gotoFenContent: function(event) {
 119       this.$router.push("/analyze/" + this.game.vname +
 120         "/?fen=" + event.target.innerText.replace(/ /g, "_"));
 121     },
 122     download: function() {
 123       const content = this.getPgn();
 124       // Prepare and trigger download link
 125       let downloadAnchor = document.getElementById("download");
 126       downloadAnchor.setAttribute("download", "game.pgn");
 127       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 128       downloadAnchor.click();
 129     },
 130     getPgn: function() {
 131       let pgn = "";
 132       pgn += '[Site "vchess.club"]\n';
 133       pgn += '[Variant "' + this.game.vname + '"]\n';
 134       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 135       pgn += '[White "' + this.game.players[0].name + '"]\n';
 136       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 137       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 138       pgn += '[Result "' + this.score + '"]\n\n';
 139       let counter = 1;
 140       let i = 0;
 141       while (i < this.moves.length)
 142       {
 143         pgn += (counter++) + ".";
 144         for (let color of ["w","b"])
 145         {
 146           let move = "";
 147           while (i < this.moves.length && this.moves[i].color == color)
 148             move += this.moves[i++].notation + ",";
 149           move = move.slice(0,-1); //remove last comma
 150           pgn += move + (i < this.moves.length ? " " : "");
 151         }
 152       }
 153       return pgn + "\n";
 154     },
 155     getScoreMessage: function(score) {
 156       let eogMessage = "Undefined";
 157       switch (score)
 158       {
 159         case "1-0":
 160           eogMessage = this.st.tr["White win"];
 161           break;
 162         case "0-1":
 163           eogMessage = this.st.tr["Black win"];
 164           break;
 165         case "1/2":
 166           eogMessage = this.st.tr["Draw"];
 167           break;
 168         case "?":
 169           eogMessage = this.st.tr["Unfinished"];
 170           break;
 171       }
 172       return eogMessage;
 173     },
 174     showEndgameMsg: function(message) {
 175       this.endgameMessage = message;
 176       let modalBox = document.getElementById("modalEog");
 177       modalBox.checked = true;
 178       setTimeout(() => { modalBox.checked = false; }, 2000);
 179     },
 180     endGame: function(score, message, bubbleUp) {
 181       this.gameHasEnded = true;
 182       this.score = score;
 183       if (!message)
 184         message = this.getScoreMessage(score);
 185       this.showEndgameMsg(score + " . " + message);
 186       if (bubbleUp)
 187         this.$emit("gameover", score);
 188     },
 189     animateMove: function(move) {
 190       let startSquare = document.getElementById(getSquareId(move.start));
 191       let endSquare = document.getElementById(getSquareId(move.end));
 192       let rectStart = startSquare.getBoundingClientRect();
 193       let rectEnd = endSquare.getBoundingClientRect();
 194       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 195       let movingPiece =
 196         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 197       // HACK for animation (with positive translate, image slides "under background")
 198       // Possible improvement: just alter squares on the piece's way...
 199       const squares = document.getElementsByClassName("board");
 200       for (let i=0; i<squares.length; i++)
 201       {
 202         let square = squares.item(i);
 203         if (square.id != getSquareId(move.start))
 204           square.style.zIndex = "-1";
 205       }
 206       movingPiece.style.transform = "translate(" + translation.x + "px," +
 207         translation.y + "px)";
 208       movingPiece.style.transitionDuration = "0.2s";
 209       movingPiece.style.zIndex = "3000";
 210       setTimeout( () => {
 211         for (let i=0; i<squares.length; i++)
 212           squares.item(i).style.zIndex = "auto";
 213         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 214         this.play(move);
 215       }, 250);
 216     },
 217     play: function(move, receive, noanimate) {
 218       const navigate = !move;
 219       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 220       // (except if we receive opponent's move, human or computer)
 221       if (!navigate && !this.analyze && !receive
 222         && this.cursor < this.moves.length-1)
 223       {
 224         return;
 225       }
 226       if (navigate)
 227       {
 228         if (this.cursor == this.moves.length-1)
 229           return; //no more moves
 230         move = this.moves[this.cursor+1];
 231       }
 232       if (!!receive && !noanimate) //opponent move, variant != "Dark"
 233       {
 234         if (this.cursor < this.moves.length-1)
 235           this.gotoEnd(); //required to play the move
 236         return this.animateMove(move);
 237       }
 238       if (!navigate)
 239       {
 240         move.color = this.vr.turn;
 241         move.notation = this.vr.getNotation(move);
 242       }
 243       // Not programmatic, or animation is over
 244       this.vr.play(move);
 245       this.cursor++;
 246       this.lastMove = move;
 247       if (this.st.settings.sound == 2)
 248         new Audio("/sounds/move.mp3").play().catch(err => {});
 249       if (!navigate)
 250       {
 251         move.fen = this.vr.getFen();
 252         if (this.score == "*" || this.analyze)
 253         {
 254           // Stack move on movesList at current cursor
 255           if (this.cursor == this.moves.length)
 256             this.moves.push(move);
 257           else
 258             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 259         }
 260       }
 261       if (!this.analyze)
 262         this.$emit("newmove", move); //post-processing (e.g. computer play)
 263       // Is opponent in check?
 264       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 265       const score = this.vr.getCurrentScore();
 266       if (score != "*")
 267       {
 268         if (!this.analyze)
 269           this.endGame(score, undefined, true);
 270         else
 271         {
 272           // Just show score on screen (allow undo)
 273           const message = this.getScoreMessage(score);
 274           this.showEndgameMsg(score + " . " + message);
 275         }
 276       }
 277     },
 278     undo: function(move) {
 279       const navigate = !move;
 280       if (navigate)
 281       {
 282         if (this.cursor < 0)
 283           return; //no more moves
 284         move = this.moves[this.cursor];
 285       }
 286       this.vr.undo(move);
 287       this.cursor--;
 288       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 289       if (this.st.settings.sound == 2)
 290         new Audio("/sounds/undo.mp3").play().catch(err => {});
 291       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 292       if (!navigate)
 293         this.moves.pop();
 294     },
 295     gotoMove: function(index) {
 296       this.vr.re_init(this.moves[index].fen);
 297       this.cursor = index;
 298       this.lastMove = this.moves[index];
 299     },
 300     gotoBegin: function() {
 301       this.vr.re_init(this.game.fenStart);
 302       this.cursor = -1;
 303       this.lastMove = null;
 304     },
 305     gotoEnd: function() {
 306       this.gotoMove(this.moves.length-1);
 307     },
 308     flip: function() {
 309       this.orientation = V.GetNextCol(this.orientation);
 310     },
 311   },
 312 };
 313 </script>