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 {{ 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     };
  55   },
  56   watch: {
  57     // game initial FEN changes when a new game starts
  58     "game.fenStart": function() {
  59       this.re_setVariables();
  60     },
  61     // Received a new move to play:
  62     "game.moveToPlay": function() {
  63       this.play(this.game.moveToPlay, "receive", this.game.vname=="Dark");
  64     },
  65     "game.score": function(score) {
  66       if (score != "*")
  67         this.endGame(score, this.game.scoreMsg);
  68     },
  69   },
  70   computed: {
  71     showMoves: function() {
  72       return true;
  73       //return window.innerWidth >= 768;
  74     },
  75     showFen: function() {
  76       return this.game.vname != "Dark" || this.score != "*";
  77     },
  78     analyze: function() {
  79       return this.game.mode == "analyze" || this.score != "*";
  80     },
  81   },
  82   created: function() {
  83     if (!!this.game.fenStart)
  84       this.re_setVariables();
  85   },
  86   methods: {
  87     re_setVariables: function() {
  88       this.endgameMessage = "";
  89       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
  90       this.score = this.game.score || "*"; //mutable (if initially "*")
  91       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
  92       // Post-processing: decorate each move with color + current FEN:
  93       // (to be able to jump to any position quickly)
  94       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
  95       this.moves.forEach(move => {
  96         // NOTE: this is doing manually what play() function below achieve,
  97         // but in a lighter "fast-forward" way
  98         move.color = vr_tmp.turn;
  99         move.notation = vr_tmp.getNotation(move);
 100         vr_tmp.play(move);
 101         move.fen = vr_tmp.getFen();
 102       });
 103       const L = this.moves.length;
 104       this.cursor = L-1;
 105       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 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].name + '"]\n';
 121       pgn += '[Black "' + this.game.players[1].name + '"]\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 + ",";
 134           move = move.slice(0,-1); //remove last comma
 135           pgn += move + (i < this.moves.length ? " " : "");
 136         }
 137       }
 138       return pgn + "\n";
 139     },
 140     getScoreMessage: function(score) {
 141       let eogMessage = "Undefined";
 142       switch (score)
 143       {
 144         case "1-0":
 145           eogMessage = this.st.tr["White win"];
 146           break;
 147         case "0-1":
 148           eogMessage = this.st.tr["Black win"];
 149           break;
 150         case "1/2":
 151           eogMessage = this.st.tr["Draw"];
 152           break;
 153         case "?":
 154           eogMessage = this.st.tr["Unfinished"];
 155           break;
 156       }
 157       return eogMessage;
 158     },
 159     showEndgameMsg: function(message) {
 160       this.endgameMessage = message;
 161       let modalBox = document.getElementById("modalEog");
 162       modalBox.checked = true;
 163       setTimeout(() => { modalBox.checked = false; }, 2000);
 164     },
 165     endGame: function(score, message) {
 166       this.score = score;
 167       if (!message)
 168         message = this.getScoreMessage(score);
 169       this.showEndgameMsg(score + " . " + message);
 170       this.$emit("gameover", score);
 171     },
 172     animateMove: function(move) {
 173       let startSquare = document.getElementById(getSquareId(move.start));
 174       let endSquare = document.getElementById(getSquareId(move.end));
 175       let rectStart = startSquare.getBoundingClientRect();
 176       let rectEnd = endSquare.getBoundingClientRect();
 177       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 178       let movingPiece =
 179         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 180       // HACK for animation (with positive translate, image slides "under background")
 181       // Possible improvement: just alter squares on the piece's way...
 182       const squares = document.getElementsByClassName("board");
 183       for (let i=0; i<squares.length; i++)
 184       {
 185         let square = squares.item(i);
 186         if (square.id != getSquareId(move.start))
 187           square.style.zIndex = "-1";
 188       }
 189       movingPiece.style.transform = "translate(" + translation.x + "px," +
 190         translation.y + "px)";
 191       movingPiece.style.transitionDuration = "0.2s";
 192       movingPiece.style.zIndex = "3000";
 193       setTimeout( () => {
 194         for (let i=0; i<squares.length; i++)
 195           squares.item(i).style.zIndex = "auto";
 196         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 197         this.play(move);
 198       }, 250);
 199     },
 200     play: function(move, receive, noanimate) {
 201       const navigate = !move;
 202       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 203       // (except if we receive opponent's move, human or computer)
 204       if (!navigate && !this.analyze && !receive
 205         && this.cursor < this.moves.length-1)
 206       {
 207         return;
 208       }
 209       if (navigate)
 210       {
 211         if (this.cursor == this.moves.length-1)
 212           return; //no more moves
 213         move = this.moves[this.cursor+1];
 214       }
 215       if (!!receive && !noanimate) //opponent move, variant != "Dark"
 216       {
 217         if (this.cursor < this.moves.length-1)
 218           this.gotoEnd(); //required to play the move
 219         return this.animateMove(move);
 220       }
 221       if (!navigate)
 222       {
 223         move.color = this.vr.turn;
 224         move.notation = this.vr.getNotation(move);
 225       }
 226       // Not programmatic, or animation is over
 227       this.vr.play(move);
 228       this.cursor++;
 229       this.lastMove = move;
 230       if (this.st.settings.sound == 2)
 231         new Audio("/sounds/move.mp3").play().catch(err => {});
 232       if (!navigate)
 233       {
 234         move.fen = this.vr.getFen();
 235         if (this.score == "*" || this.analyze)
 236         {
 237           // Stack move on movesList at current cursor
 238           if (this.cursor == this.moves.length)
 239             this.moves.push(move);
 240           else
 241             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 242         }
 243       }
 244       if (!this.analyze)
 245         this.$emit("newmove", move); //post-processing (e.g. computer play)
 246       // Is opponent in check?
 247       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 248       const score = this.vr.getCurrentScore();
 249       if (score != "*")
 250       {
 251         if (!this.analyze)
 252           this.endGame(score);
 253         else
 254         {
 255           // Just show score on screen (allow undo)
 256           const message = this.getScoreMessage(score);
 257           this.showEndgameMsg(score + " . " + message);
 258         }
 259       }
 260     },
 261     undo: function(move) {
 262       const navigate = !move;
 263       if (navigate)
 264       {
 265         if (this.cursor < 0)
 266           return; //no more moves
 267         move = this.moves[this.cursor];
 268       }
 269       this.vr.undo(move);
 270       this.cursor--;
 271       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 272       if (this.st.settings.sound == 2)
 273         new Audio("/sounds/undo.mp3").play().catch(err => {});
 274       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 275       if (!navigate)
 276         this.moves.pop();
 277     },
 278     gotoMove: function(index) {
 279       this.vr.re_init(this.moves[index].fen);
 280       this.cursor = index;
 281       this.lastMove = this.moves[index];
 282     },
 283     gotoBegin: function() {
 284       this.vr.re_init(this.game.fenStart);
 285       this.cursor = -1;
 286       this.lastMove = null;
 287     },
 288     gotoEnd: function() {
 289       this.gotoMove(this.moves.length-1);
 290     },
 291     flip: function() {
 292       this.orientation = V.GetNextCol(this.orientation);
 293     },
 294   },
 295 };
 296 </script>