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="game.mode=='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.section-content(v-if="showFen && !!vr")
  20       p#fenString.text-center {{ vr.getFen() }}
  21     #pgnDiv.section-content
  22       a#download(href="#")
  23       .button-group
  24         button#downloadBtn(@click="download") {{ st.tr["Download PGN"] }}
  25         button Import game
  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
  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     };
  55   },
  56   watch: {
  57     // game initial FEN changes when a new game starts
  58     "game.fenStart": function() {
  59       this.re_setVariables();
  60     },
  61   },
  62   computed: {
  63     showMoves: function() {
  64       return true;
  65       //return window.innerWidth >= 768;
  66     },
  67     showFen: function() {
  68       return this.game.vname != "Dark" || this.score != "*";
  69     },
  70     analyze: function() {
  71       return this.game.mode == "analyze";
  72     },
  73   },
  74   created: function() {
  75     if (!!this.game.fenStart)
  76       this.re_setVariables();
  77   },
  78   methods: {
  79     re_setVariables: function() {
  80       this.endgameMessage = "";
  81       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
  82       this.score = this.game.score || "*"; //mutable (if initially "*")
  83       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
  84       const L = this.moves.length;
  85       this.cursor = L-1;
  86       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
  87     },
  88     setEndgameMessage: function(score) {
  89       let eogMessage = "Undefined";
  90       switch (score)
  91       {
  92         case "1-0":
  93           eogMessage = translations["White win"];
  94           break;
  95         case "0-1":
  96           eogMessage = translations["Black win"];
  97           break;
  98         case "1/2":
  99           eogMessage = translations["Draw"];
 100           break;
 101         case "?":
 102           eogMessage = "Unfinished";
 103           break;
 104       }
 105       this.endgameMessage = eogMessage;
 106     },
 107     download: function() {
 108       const content = this.getPgn();
 109       // Prepare and trigger download link
 110       let downloadAnchor = document.getElementById("download");
 111       downloadAnchor.setAttribute("download", "game.pgn");
 112       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 113       downloadAnchor.click();
 114     },
 115     getPgn: function() {
 116       let pgn = "";
 117       pgn += '[Site "vchess.club"]\n';
 118       pgn += '[Variant "' + this.game.vname + '"]\n';
 119       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 120       pgn += '[White "' + this.game.players[0] + '"]\n';
 121       pgn += '[Black "' + this.game.players[1] + '"]\n';
 122       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 123       pgn += '[Result "' + this.score + '"]\n\n';
 124       let counter = 1;
 125       let i = 0;
 126       while (i < this.moves.length)
 127       {
 128         pgn += (counter++) + ".";
 129         for (let color of ["w","b"])
 130         {
 131           let move = "";
 132           while (i < this.moves.length && this.moves[i].color == color)
 133             move += this.moves[i++].notation[0] + ",";
 134           move = move.slice(0,-1); //remove last comma
 135           pgn += move + (i < this.moves.length-1 ? " " : "");
 136         }
 137       }
 138       return pgn + "\n";
 139     },
 140     showScoreMsg: function(score) {
 141       this.setEndgameMessage(score);
 142       let modalBox = document.getElementById("modalEog");
 143       modalBox.checked = true;
 144       setTimeout(() => { modalBox.checked = false; }, 2000);
 145     },
 146
 147 // TODO: second arg == message
 148
 149     endGame: function(score) {
 150       this.score = score;
 151       this.showScoreMsg(score);
 152       this.$emit("gameover", score);
 153     },
 154     animateMove: function(move) {
 155       let startSquare = document.getElementById(getSquareId(move.start));
 156       let endSquare = document.getElementById(getSquareId(move.end));
 157       let rectStart = startSquare.getBoundingClientRect();
 158       let rectEnd = endSquare.getBoundingClientRect();
 159       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 160       let movingPiece =
 161         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 162       // HACK for animation (with positive translate, image slides "under background")
 163       // Possible improvement: just alter squares on the piece's way...
 164       const squares = document.getElementsByClassName("board");
 165       for (let i=0; i<squares.length; i++)
 166       {
 167         let square = squares.item(i);
 168         if (square.id != getSquareId(move.start))
 169           square.style.zIndex = "-1";
 170       }
 171       movingPiece.style.transform = "translate(" + translation.x + "px," +
 172         translation.y + "px)";
 173       movingPiece.style.transitionDuration = "0.2s";
 174       movingPiece.style.zIndex = "3000";
 175       setTimeout( () => {
 176         for (let i=0; i<squares.length; i++)
 177           squares.item(i).style.zIndex = "auto";
 178         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 179         this.play(move);
 180       }, 250);
 181     },
 182     play: function(move, receive, noanimate) {
 183       const navigate = !move;
 184       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 185       // (except if we receive opponent's move, human or computer)
 186       if (!navigate && !this.analyze && !receive
 187         && this.cursor < this.moves.length-1)
 188       {
 189         return;
 190       }
 191       if (navigate)
 192       {
 193         if (this.cursor == this.moves.length-1)
 194           return; //no more moves
 195         move = this.moves[this.cursor+1];
 196       }
 197       if (!!receive && !noanimate) //opponent move, variant != "Dark"
 198       {
 199         if (this.cursor < this.moves.length-1)
 200           this.gotoEnd(); //required to play the move
 201         return this.animateMove(move);
 202       }
 203       if (!navigate)
 204       {
 205         move.color = this.vr.turn;
 206         move.notation = this.vr.getNotation(move);
 207       }
 208       // Not programmatic, or animation is over
 209       this.vr.play(move);
 210       this.cursor++;
 211       this.lastMove = move;
 212       if (this.st.settings.sound == 2)
 213         new Audio("/sounds/move.mp3").play().catch(err => {});
 214       if (!navigate)
 215       {
 216         move.fen = this.vr.getFen();
 217         if (this.score == "*" || this.analyze)
 218         {
 219           // Stack move on movesList at current cursor
 220           if (this.cursor == this.moves.length)
 221             this.moves.push(move);
 222           else
 223             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 224         }
 225       }
 226       // Is opponent in check? (TODO: generalize, find all check squares)
 227       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 228       const score = this.vr.getCurrentScore();
 229       if (score != "*") //TODO: generalize score for 3 or 4 players
 230       {
 231         if (!this.analyze)
 232           this.endGame(score);
 233         else //just show score on screen (allow undo)
 234           this.showScoreMsg(score);
 235       }
 236       if (!this.analyze)
 237         this.$emit("newmove", move); //post-processing (e.g. computer play)
 238     },
 239     undo: function(move) {
 240       const navigate = !move;
 241       if (navigate)
 242       {
 243         if (this.cursor < 0)
 244           return; //no more moves
 245         move = this.moves[this.cursor];
 246       }
 247       this.vr.undo(move);
 248       this.cursor--;
 249       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 250       if (this.st.settings.sound == 2)
 251         new Audio("/sounds/undo.mp3").play().catch(err => {});
 252       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 253       if (!navigate)
 254         this.moves.pop();
 255     },
 256     gotoMove: function(index) {
 257       this.vr.re_init(this.moves[index].fen);
 258       this.cursor = index;
 259       this.lastMove = this.moves[index];
 260     },
 261     gotoBegin: function() {
 262       this.vr.re_init(this.game.fenStart);
 263       this.cursor = -1;
 264       this.lastMove = null;
 265     },
 266     gotoEnd: function() {
 267       this.gotoMove(this.moves.length-1);
 268     },
 269     flip: function() {
 270       this.orientation = V.GetNextCol(this.orientation);
 271     },
 272   },
 273 };
 274 </script>