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