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     #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         // TODO: Import game button copy game locally in IndexedDB
  26         //button Import game
  27     //MoveList(v-if="showMoves"
  28       :moves="moves" :cursor="cursor" @goto-move="gotoMove")
  29 </template>
  30
  31 <script>
  32 import Board from "@/components/Board.vue";
  33 //import MoveList from "@/components/MoveList.vue";
  34 import { store } from "@/store";
  35 import { getSquareId } from "@/utils/squareId";
  36 import { getDate } from "@/utils/datetime";
  37
  38 export default {
  39   name: 'my-base-game',
  40   components: {
  41     Board,
  42     //MoveList,
  43   },
  44   // "vr": VariantRules object, describing the game state + rules
  45   props: ["vr","game"],
  46   data: function() {
  47     return {
  48       st: store.state,
  49       // NOTE: all following variables must be reset at the beginning of a game
  50       endgameMessage: "",
  51       orientation: "w",
  52       score: "*", //'*' means 'unfinished'
  53       moves: [],
  54       cursor: -1, //index of the move just played
  55       lastMove: null,
  56     };
  57   },
  58   watch: {
  59     // game initial FEN changes when a new game starts
  60     "game.fenStart": function() {
  61       this.re_setVariables();
  62     },
  63   },
  64   computed: {
  65     showMoves: function() {
  66       return true;
  67       //return window.innerWidth >= 768;
  68     },
  69     showFen: function() {
  70       return this.game.vname != "Dark" || this.score != "*";
  71     },
  72     analyze: function() {
  73       return this.game.mode == "analyze" || this.game.score != "*";
  74     },
  75   },
  76   created: function() {
  77     if (!!this.game.fenStart)
  78       this.re_setVariables();
  79   },
  80   methods: {
  81     re_setVariables: function() {
  82       this.endgameMessage = "";
  83       this.orientation = this.game.mycolor || "w"; //default orientation for observed games
  84       this.score = this.game.score || "*"; //mutable (if initially "*")
  85       this.moves = JSON.parse(JSON.stringify(this.game.moves || []));
  86       // Post-processing: decorate each move with color + current FEN:
  87       // (to be able to jump to any position quickly)
  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 = this.vr.turn;
  92         move.notation = this.vr.getNotation(move);
  93         this.vr.play(move);
  94         move.fen = this.vr.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     download: function() {
 101       const content = this.getPgn();
 102       // Prepare and trigger download link
 103       let downloadAnchor = document.getElementById("download");
 104       downloadAnchor.setAttribute("download", "game.pgn");
 105       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 106       downloadAnchor.click();
 107     },
 108     getPgn: function() {
 109       let pgn = "";
 110       pgn += '[Site "vchess.club"]\n';
 111       pgn += '[Variant "' + this.game.vname + '"]\n';
 112       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 113       pgn += '[White "' + this.game.players[0].name + '"]\n';
 114       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 115       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 116       pgn += '[Result "' + this.score + '"]\n\n';
 117       let counter = 1;
 118       let i = 0;
 119       while (i < this.moves.length)
 120       {
 121         pgn += (counter++) + ".";
 122         for (let color of ["w","b"])
 123         {
 124           let move = "";
 125           while (i < this.moves.length && this.moves[i].color == color)
 126             move += this.moves[i++].notation + ",";
 127           move = move.slice(0,-1); //remove last comma
 128           pgn += move + (i < this.moves.length ? " " : "");
 129         }
 130       }
 131       return pgn + "\n";
 132     },
 133     getScoreMessage: function(score) {
 134       let eogMessage = "Undefined";
 135       switch (score)
 136       {
 137         case "1-0":
 138           eogMessage = this.st.tr["White win"];
 139           break;
 140         case "0-1":
 141           eogMessage = this.st.tr["Black win"];
 142           break;
 143         case "1/2":
 144           eogMessage = this.st.tr["Draw"];
 145           break;
 146         case "?":
 147           eogMessage = this.st.tr["Unfinished"];
 148           break;
 149       }
 150       return eogMessage;
 151     },
 152     showEndgameMsg: function(message) {
 153       this.endgameMessage = message;
 154       let modalBox = document.getElementById("modalEog");
 155       modalBox.checked = true;
 156       setTimeout(() => { modalBox.checked = false; }, 2000);
 157     },
 158     endGame: function(score, message) {
 159       this.score = score;
 160       if (!message)
 161         message = this.getScoreMessage(score);
 162       this.showEndgameMsg(score + " . " + message);
 163       this.$emit("gameover", score);
 164     },
 165     animateMove: function(move) {
 166       let startSquare = document.getElementById(getSquareId(move.start));
 167       let endSquare = document.getElementById(getSquareId(move.end));
 168       let rectStart = startSquare.getBoundingClientRect();
 169       let rectEnd = endSquare.getBoundingClientRect();
 170       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 171       let movingPiece =
 172         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 173       // HACK for animation (with positive translate, image slides "under background")
 174       // Possible improvement: just alter squares on the piece's way...
 175       const squares = document.getElementsByClassName("board");
 176       for (let i=0; i<squares.length; i++)
 177       {
 178         let square = squares.item(i);
 179         if (square.id != getSquareId(move.start))
 180           square.style.zIndex = "-1";
 181       }
 182       movingPiece.style.transform = "translate(" + translation.x + "px," +
 183         translation.y + "px)";
 184       movingPiece.style.transitionDuration = "0.2s";
 185       movingPiece.style.zIndex = "3000";
 186       setTimeout( () => {
 187         for (let i=0; i<squares.length; i++)
 188           squares.item(i).style.zIndex = "auto";
 189         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 190         this.play(move);
 191       }, 250);
 192     },
 193     play: function(move, receive, noanimate) {
 194       const navigate = !move;
 195       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 196       // (except if we receive opponent's move, human or computer)
 197       if (!navigate && !this.analyze && !receive
 198         && this.cursor < this.moves.length-1)
 199       {
 200         return;
 201       }
 202       if (navigate)
 203       {
 204         if (this.cursor == this.moves.length-1)
 205           return; //no more moves
 206         move = this.moves[this.cursor+1];
 207       }
 208       if (!!receive && !noanimate) //opponent move, variant != "Dark"
 209       {
 210         if (this.cursor < this.moves.length-1)
 211           this.gotoEnd(); //required to play the move
 212         return this.animateMove(move);
 213       }
 214       if (!navigate)
 215       {
 216         move.color = this.vr.turn;
 217         move.notation = this.vr.getNotation(move);
 218       }
 219       // Not programmatic, or animation is over
 220       this.vr.play(move);
 221       this.cursor++;
 222       this.lastMove = move;
 223       if (this.st.settings.sound == 2)
 224         new Audio("/sounds/move.mp3").play().catch(err => {});
 225       if (!navigate)
 226       {
 227         move.fen = this.vr.getFen();
 228         if (this.score == "*" || this.analyze)
 229         {
 230           // Stack move on movesList at current cursor
 231           if (this.cursor == this.moves.length)
 232             this.moves.push(move);
 233           else
 234             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 235         }
 236       }
 237       // Is opponent in check? (TODO: generalize, find all check squares)
 238       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 239       const score = this.vr.getCurrentScore();
 240       if (score != "*") //TODO: generalize score for 3 or 4 players
 241       {
 242         if (!this.analyze)
 243           this.endGame(score);
 244         else
 245         {
 246           // Just show score on screen (allow undo)
 247           const message = this.getScoreMessage(score);
 248           this.showEndgameMsg(score + " . " + message);
 249         }
 250       }
 251       if (!this.analyze)
 252         this.$emit("newmove", move); //post-processing (e.g. computer play)
 253     },
 254     undo: function(move) {
 255       const navigate = !move;
 256       if (navigate)
 257       {
 258         if (this.cursor < 0)
 259           return; //no more moves
 260         move = this.moves[this.cursor];
 261       }
 262       this.vr.undo(move);
 263       this.cursor--;
 264       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 265       if (this.st.settings.sound == 2)
 266         new Audio("/sounds/undo.mp3").play().catch(err => {});
 267       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 268       if (!navigate)
 269         this.moves.pop();
 270     },
 271     gotoMove: function(index) {
 272       this.vr.re_init(this.moves[index].fen);
 273       this.cursor = index;
 274       this.lastMove = this.moves[index];
 275     },
 276     gotoBegin: function() {
 277       this.vr.re_init(this.game.fenStart);
 278       this.cursor = -1;
 279       this.lastMove = null;
 280     },
 281     gotoEnd: function() {
 282       this.gotoMove(this.moves.length-1);
 283     },
 284     flip: function() {
 285       this.orientation = V.GetNextCol(this.orientation);
 286     },
 287   },
 288 };
 289 </script>