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       let vr_tmp = new V(this.game.fenStart); //vr is already at end of game
  89       this.moves.forEach(move => {
  90         // NOTE: this is doing manually what play() function below achieve,
  91         // but in a lighter "fast-forward" way
  92         move.color = vr_tmp.turn;
  93         move.notation = vr_tmp.getNotation(move);
  94         vr_tmp.play(move);
  95         move.fen = vr_tmp.getFen();
  96       });
  97       const L = this.moves.length;
  98       this.cursor = L-1;
  99       this.lastMove = (L > 0 ? this.moves[L-1]  : null);
 100     },
 101     download: function() {
 102       const content = this.getPgn();
 103       // Prepare and trigger download link
 104       let downloadAnchor = document.getElementById("download");
 105       downloadAnchor.setAttribute("download", "game.pgn");
 106       downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 107       downloadAnchor.click();
 108     },
 109     getPgn: function() {
 110       let pgn = "";
 111       pgn += '[Site "vchess.club"]\n';
 112       pgn += '[Variant "' + this.game.vname + '"]\n';
 113       pgn += '[Date "' + getDate(new Date()) + '"]\n';
 114       pgn += '[White "' + this.game.players[0].name + '"]\n';
 115       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 116       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 117       pgn += '[Result "' + this.score + '"]\n\n';
 118       let counter = 1;
 119       let i = 0;
 120       while (i < this.moves.length)
 121       {
 122         pgn += (counter++) + ".";
 123         for (let color of ["w","b"])
 124         {
 125           let move = "";
 126           while (i < this.moves.length && this.moves[i].color == color)
 127             move += this.moves[i++].notation + ",";
 128           move = move.slice(0,-1); //remove last comma
 129           pgn += move + (i < this.moves.length ? " " : "");
 130         }
 131       }
 132       return pgn + "\n";
 133     },
 134     getScoreMessage: function(score) {
 135       let eogMessage = "Undefined";
 136       switch (score)
 137       {
 138         case "1-0":
 139           eogMessage = this.st.tr["White win"];
 140           break;
 141         case "0-1":
 142           eogMessage = this.st.tr["Black win"];
 143           break;
 144         case "1/2":
 145           eogMessage = this.st.tr["Draw"];
 146           break;
 147         case "?":
 148           eogMessage = this.st.tr["Unfinished"];
 149           break;
 150       }
 151       return eogMessage;
 152     },
 153     showEndgameMsg: function(message) {
 154       this.endgameMessage = message;
 155       let modalBox = document.getElementById("modalEog");
 156       modalBox.checked = true;
 157       setTimeout(() => { modalBox.checked = false; }, 2000);
 158     },
 159     endGame: function(score, message) {
 160       this.score = score;
 161       if (!message)
 162         message = this.getScoreMessage(score);
 163       this.showEndgameMsg(score + " . " + message);
 164       this.$emit("gameover", score);
 165     },
 166     animateMove: function(move) {
 167       let startSquare = document.getElementById(getSquareId(move.start));
 168       let endSquare = document.getElementById(getSquareId(move.end));
 169       let rectStart = startSquare.getBoundingClientRect();
 170       let rectEnd = endSquare.getBoundingClientRect();
 171       let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 172       let movingPiece =
 173         document.querySelector("#" + getSquareId(move.start) + " > img.piece");
 174       // HACK for animation (with positive translate, image slides "under background")
 175       // Possible improvement: just alter squares on the piece's way...
 176       const squares = document.getElementsByClassName("board");
 177       for (let i=0; i<squares.length; i++)
 178       {
 179         let square = squares.item(i);
 180         if (square.id != getSquareId(move.start))
 181           square.style.zIndex = "-1";
 182       }
 183       movingPiece.style.transform = "translate(" + translation.x + "px," +
 184         translation.y + "px)";
 185       movingPiece.style.transitionDuration = "0.2s";
 186       movingPiece.style.zIndex = "3000";
 187       setTimeout( () => {
 188         for (let i=0; i<squares.length; i++)
 189           squares.item(i).style.zIndex = "auto";
 190         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 191         this.play(move);
 192       }, 250);
 193     },
 194     play: function(move, receive, noanimate) {
 195       const navigate = !move;
 196       // Forbid playing outside analyze mode when cursor isn't at moves.length-1
 197       // (except if we receive opponent's move, human or computer)
 198       if (!navigate && !this.analyze && !receive
 199         && this.cursor < this.moves.length-1)
 200       {
 201         return;
 202       }
 203       if (navigate)
 204       {
 205         if (this.cursor == this.moves.length-1)
 206           return; //no more moves
 207         move = this.moves[this.cursor+1];
 208       }
 209       if (!!receive && !noanimate) //opponent move, variant != "Dark"
 210       {
 211         if (this.cursor < this.moves.length-1)
 212           this.gotoEnd(); //required to play the move
 213         return this.animateMove(move);
 214       }
 215       if (!navigate)
 216       {
 217         move.color = this.vr.turn;
 218         move.notation = this.vr.getNotation(move);
 219       }
 220       // Not programmatic, or animation is over
 221       this.vr.play(move);
 222       this.cursor++;
 223       this.lastMove = move;
 224       if (this.st.settings.sound == 2)
 225         new Audio("/sounds/move.mp3").play().catch(err => {});
 226       if (!navigate)
 227       {
 228         move.fen = this.vr.getFen();
 229         if (this.score == "*" || this.analyze)
 230         {
 231           // Stack move on movesList at current cursor
 232           if (this.cursor == this.moves.length)
 233             this.moves.push(move);
 234           else
 235             this.moves = this.moves.slice(0,this.cursor).concat([move]);
 236         }
 237       }
 238       // Is opponent in check? (TODO: generalize, find all check squares)
 239       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 240       const score = this.vr.getCurrentScore();
 241       if (score != "*") //TODO: generalize score for 3 or 4 players
 242       {
 243         if (!this.analyze)
 244           this.endGame(score);
 245         else
 246         {
 247           // Just show score on screen (allow undo)
 248           const message = this.getScoreMessage(score);
 249           this.showEndgameMsg(score + " . " + message);
 250         }
 251       }
 252       if (!this.analyze)
 253         this.$emit("newmove", move); //post-processing (e.g. computer play)
 254     },
 255     undo: function(move) {
 256       const navigate = !move;
 257       if (navigate)
 258       {
 259         if (this.cursor < 0)
 260           return; //no more moves
 261         move = this.moves[this.cursor];
 262       }
 263       this.vr.undo(move);
 264       this.cursor--;
 265       this.lastMove = (this.cursor >= 0 ? this.moves[this.cursor] : undefined);
 266       if (this.st.settings.sound == 2)
 267         new Audio("/sounds/undo.mp3").play().catch(err => {});
 268       this.incheck = this.vr.getCheckSquares(this.vr.turn);
 269       if (!navigate)
 270         this.moves.pop();
 271     },
 272     gotoMove: function(index) {
 273       this.vr.re_init(this.moves[index].fen);
 274       this.cursor = index;
 275       this.lastMove = this.moves[index];
 276     },
 277     gotoBegin: function() {
 278       this.vr.re_init(this.game.fenStart);
 279       this.cursor = -1;
 280       this.lastMove = null;
 281     },
 282     gotoEnd: function() {
 283       this.gotoMove(this.moves.length-1);
 284     },
 285     flip: function() {
 286       this.orientation = V.GetNextCol(this.orientation);
 287     },
 288   },
 289 };
 290 </script>