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