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