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-group
  25         button#downloadBtn(@click="download") {{ st.tr["Download PGN"] }}
  26         // TODO: Import game button copy game locally in IndexedDB
  27         //button Import game
  28     //MoveList(v-if="showMoves"
  29       :moves="moves" :cursor="cursor" @goto-move="gotoMove")
  30 </template>
  31
  32 <script>
  33 import Board from "@/components/Board.vue";
  34 //import MoveList from "@/components/MoveList.vue";
  35 import { store } from "@/store";
  36 import { getSquareId } from "@/utils/squareId";
  37 import { getDate } from "@/utils/datetime";
  38
  39 export default {
  40   name: 'my-base-game',
  41   components: {
  42     Board,
  43     //MoveList,
  44   },
  45   // "vr": VariantRules object, describing the game state + rules
  46   props: ["vr","game"],
  47   data: function() {
  48     return {
  49       st: store.state,
  50       // NOTE: all following variables must be reset at the beginning of a game
  51       endgameMessage: "",
  52       orientation: "w",
  53       score: "*", //'*' means 'unfinished'
  54       moves: [],
  55       cursor: -1, //index of the move just played
  56       lastMove: null,
  57     };
  58   },
  59   watch: {
  60     // game initial FEN changes when a new game starts
  61     "game.fenStart": function() {
  62       this.re_setVariables();
  63     },
  64   },
  65   computed: {
  66     showMoves: function() {
  67       return true;
  68       //return window.innerWidth >= 768;
  69     },
  70     showFen: function() {
  71       return this.game.vname != "Dark" || this.score != "*";
  72     },
  73     analyze: function() {
  74       return this.game.mode == "analyze" || this.game.score != "*";
  75     },
  76   },
  77   created: function() {
  78     if (!!this.game.fenStart)
  79       this.re_setVariables();
  80   },
  81   methods: {
  82     re_setVariables: function() {
  83       this.endgameMessage = "";
  84       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
  85       this.score = this.game.score || "*"; //mutable (if initially "*")
  86       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
  87       // Post-processing: decorate each move with color + current FEN:
  88       // (to be able to jump to any position quickly)
  89       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
  90       this.moves.forEach(move => {
  91         // NOTE: this is doing manually what play() function below achieve,
  92         // but in a lighter "fast-forward" way
  93         move.color = vr_tmp.turn;
  94         move.notation = vr_tmp.getNotation(move);
  95         vr_tmp.play(move);
  96         move.fen = vr_tmp.getFen();
  97       });
  98       const L = this.moves.length;
  99       this.cursor = L-1;
 100       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 101     },
 102     // For corr games, potential message with each move sent
 103     curMoveMessage: function() {
 104       if (this.cursor < 0)
 105         return "";
 106       return this.game.moves[this.cursor].message || "";
 107     },
 108     download: function() {
 109       const content = this.getPgn();
 110       // Prepare and trigger download link
 111       let downloadAnchor = document.getElementById("download");
 112       downloadAnchor.setAttribute("download", "game.pgn");
 113       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 114       downloadAnchor.click();
 115     },
 116     getPgn: function() {
 117       let pgn = "";
 118       pgn += '[Site "vchess.club"]\n';
 119       pgn += '[Variant "' + this.game.vname + '"]\n';
 120       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 121       pgn += '[White "' + this.game.players[0].name + '"]\n';
 122       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 123       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 124       pgn += '[Result "' + this.score + '"]\n\n';
 125       let counter = 1;
 126       let i = 0;
 127       while (i < this.moves.length)
 128       {
 129         pgn += (counter++) + ".";
 130         for (let color of ["w","b"])
 131         {
 132           let move = "";
 133           while (i < this.moves.length && this.moves[i].color == color)
 134             move += this.moves[i++].notation + ",";
 135           move = move.slice(0,-1); //remove last comma
 136           pgn += move + (i < this.moves.length ? " " : "");
 137         }
 138       }
 139       return pgn + "\n";
 140     },
 141     getScoreMessage: function(score) {
 142       let eogMessage = "Undefined";
 143       switch (score)
 144       {
 145         case "1-0":
 146           eogMessage = this.st.tr["White win"];
 147           break;
 148         case "0-1":
 149           eogMessage = this.st.tr["Black win"];
 150           break;
 151         case "1/2":
 152           eogMessage = this.st.tr["Draw"];
 153           break;
 154         case "?":
 155           eogMessage = this.st.tr["Unfinished"];
 156           break;
 157       }
 158       return eogMessage;
 159     },
 160     showEndgameMsg: function(message) {
 161       this.endgameMessage = message;
 162       let modalBox = document.getElementById("modalEog");
 163       modalBox.checked = true;
 164       setTimeout(() => { modalBox.checked = false; }, 2000);
 165     },
 166     endGame: function(score, message) {
 167       this.score = score;
 168       if (!message)
 169         message = this.getScoreMessage(score);
 170       this.showEndgameMsg(score + " . " + message);
 171       this.$emit("gameover", score);
 172     },
 173     animateMove: function(move) {
 174       let startSquare = document.getElementById(getSquareId(move.start));
 175       let endSquare = document.getElementById(getSquareId(move.end));
 176       let rectStart = startSquare.getBoundingClientRect();
 177       let rectEnd = endSquare.getBoundingClientRect();
 178       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 179       let movingPiece =
 180         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 181       // HACK for animation (with positive translate, image slides "under background")
 182       // Possible improvement: just alter squares on the piece's way...
 183       const squares = document.getElementsByClassName("board");
 184       for (let i=0; i<squares.length; i++)
 185       {
 186         let square = squares.item(i);
 187         if (square.id != getSquareId(move.start))
 188           square.style.zIndex = "-1";
 189       }
 190       movingPiece.style.transform = "translate(" + translation.x + "px," +
 191         translation.y + "px)";
 192       movingPiece.style.transitionDuration = "0.2s";
 193       movingPiece.style.zIndex = "3000";
 194       setTimeout( () => {
 195         for (let i=0; i<squares.length; i++)
 196           squares.item(i).style.zIndex = "auto";
 197         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 198         this.play(move);
 199       }, 250);
 200     },
 201     play: function(move, receive, noanimate) {
 202       const navigate = !move;
 203       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 204       // (except if we receive opponent's move, human or computer)
 205       if (!navigate && !this.analyze && !receive
 206         && this.cursor < this.moves.length-1)
 207       {
 208         return;
 209       }
 210       if (navigate)
 211       {
 212         if (this.cursor == this.moves.length-1)
 213           return; //no more moves
 214         move = this.moves[this.cursor+1];
 215       }
 216       if (!!receive && !noanimate) //opponent move, variant != "Dark"
 217       {
 218         if (this.cursor < this.moves.length-1)
 219           this.gotoEnd(); //required to play the move
 220         return this.animateMove(move);
 221       }
 222       if (!navigate)
 223       {
 224         move.color = this.vr.turn;
 225         move.notation = this.vr.getNotation(move);
 226       }
 227       // Not programmatic, or animation is over
 228       this.vr.play(move);
 229       this.cursor++;
 230       this.lastMove = move;
 231       if (this.st.settings.sound == 2)
 232         new Audio("/sounds/move.mp3").play().catch(err => {});
 233       if (!navigate)
 234       {
 235         move.fen = this.vr.getFen();
 236         if (this.score == "*" || this.analyze)
 237         {
 238           // Stack move on movesList at current cursor
 239           if (this.cursor == this.moves.length)
 240             this.moves.push(move);
 241           else
 242             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 243         }
 244       }
 245       if (!this.analyze)
 246         this.$emit("newmove", move); //post-processing (e.g. computer play)
 247       // Is opponent in check?
 248       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 249       const score = this.vr.getCurrentScore();
 250       if (score != "*")
 251       {
 252         if (!this.analyze)
 253           this.endGame(score);
 254         else
 255         {
 256           // Just show score on screen (allow undo)
 257           const message = this.getScoreMessage(score);
 258           this.showEndgameMsg(score + " . " + message);
 259         }
 260       }
 261     },
 262     undo: function(move) {
 263       const navigate = !move;
 264       if (navigate)
 265       {
 266         if (this.cursor < 0)
 267           return; //no more moves
 268         move = this.moves[this.cursor];
 269       }
 270       this.vr.undo(move);
 271       this.cursor--;
 272       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 273       if (this.st.settings.sound == 2)
 274         new Audio("/sounds/undo.mp3").play().catch(err => {});
 275       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 276       if (!navigate)
 277         this.moves.pop();
 278     },
 279     gotoMove: function(index) {
 280       this.vr.re_init(this.moves[index].fen);
 281       this.cursor = index;
 282       this.lastMove = this.moves[index];
 283     },
 284     gotoBegin: function() {
 285       this.vr.re_init(this.game.fenStart);
 286       this.cursor = -1;
 287       this.lastMove = null;
 288     },
 289     gotoEnd: function() {
 290       this.gotoMove(this.moves.length-1);
 291     },
 292     flip: function() {
 293       this.orientation = V.GetNextCol(this.orientation);
 294     },
 295   },
 296 };
 297 </script>