client/src/views/Game.vue

   1 <template lang="pug">
   2 main
   3   input#modalChat.modal(
   4     type="checkbox"
   5     @click="resetChatColor()"
   6   )
   7   div#chatWrap(
   8     role="dialog"
   9     data-checkbox="modalChat"
  10   )
  11     .card
  12       label.modal-close(for="modalChat")
  13       #participants
  14         span {{ Object.keys(people).length + " " + st.tr["participant(s):"] }}
  15         span(
  16           v-for="p in Object.values(people)"
  17           v-if="p.name"
  18         )
  19           | {{ p.name }}
  20         span.anonymous(v-if="Object.values(people).some(p => !p.name && p.id === 0)")
  21           | + @nonymous
  22       Chat(
  23         ref="chatcomp"
  24         :players="game.players"
  25         :pastChats="game.chats"
  26         :newChat="newChat"
  27         @mychat="processChat"
  28         @chatcleared="clearChat"
  29       )
  30   input#modalConfirm.modal(type="checkbox")
  31   div#confirmDiv(role="dialog")
  32     .card
  33       .diagram(v-html="curDiag")
  34       .button-group#buttonsConfirm
  35         // onClick for acceptBtn: set dynamically
  36         button.acceptBtn
  37           span {{ st.tr["Validate"] }}
  38         button.refuseBtn(@click="cancelMove()")
  39           span {{ st.tr["Cancel"] }}
  40   .row
  41     #aboveBoard.col-sm-12.col-md-9.col-md-offset-3.col-lg-10.col-lg-offset-2
  42       span.variant-cadence {{ game.cadence }}
  43       span.variant-name {{ game.vname }}
  44       span#nextGame(
  45         v-if="nextIds.length > 0"
  46         @click="showNextGame()"
  47       )
  48         | {{ st.tr["Next_g"] }}
  49       button#chatBtn.tooltip(
  50         onClick="window.doClick('modalChat')"
  51         aria-label="Chat"
  52       )
  53         img(src="/images/icons/chat.svg")
  54       #actions(v-if="game.score=='*'")
  55         button.tooltip(
  56           @click="clickDraw()"
  57           :class="{['draw-' + drawOffer]: true}"
  58           :aria-label="st.tr['Draw']"
  59         )
  60           img(src="/images/icons/draw.svg")
  61         button.tooltip(
  62           v-if="!!game.mycolor"
  63           @click="abortGame()"
  64           :aria-label="st.tr['Abort']"
  65         )
  66           img(src="/images/icons/abort.svg")
  67         button.tooltip(
  68           v-if="!!game.mycolor"
  69           @click="resign()"
  70           :aria-label="st.tr['Resign']"
  71         )
  72           img(src="/images/icons/resign.svg")
  73       button.tooltip(
  74         v-else-if="!!game.mycolor"
  75         @click="rematch()"
  76         :aria-label="st.tr['Rematch']"
  77       )
  78         img(src="/images/icons/rematch.svg")
  79       #playersInfo
  80         p
  81           span.name(:class="{connected: isConnected(0)}")
  82             | {{ game.players[0].name || "@nonymous" }}
  83           span.time(
  84             v-if="game.score=='*'"
  85             :class="{yourturn: !!vr && vr.turn == 'w'}"
  86           )
  87             span.time-left {{ virtualClocks[0][0] }}
  88             span.time-separator(v-if="!!virtualClocks[0][1]") :
  89             span.time-right(v-if="!!virtualClocks[0][1]")
  90               | {{ virtualClocks[0][1] }}
  91           span.split-names -
  92           span.name(:class="{connected: isConnected(1)}")
  93             | {{ game.players[1].name || "@nonymous" }}
  94           span.time(
  95             v-if="game.score=='*'"
  96             :class="{yourturn: !!vr && vr.turn == 'b'}"
  97           )
  98             span.time-left {{ virtualClocks[1][0] }}
  99             span.time-separator(v-if="!!virtualClocks[1][1]") :
 100             span.time-right(v-if="!!virtualClocks[1][1]")
 101               | {{ virtualClocks[1][1] }}
 102   BaseGame(
 103     ref="basegame"
 104     :game="game"
 105     @newmove="processMove"
 106   )
 107 </template>
 108
 109 <script>
 110 import BaseGame from "@/components/BaseGame.vue";
 111 import Chat from "@/components/Chat.vue";
 112 import { store } from "@/store";
 113 import { GameStorage } from "@/utils/gameStorage";
 114 import { ppt } from "@/utils/datetime";
 115 import { ajax } from "@/utils/ajax";
 116 import { extractTime } from "@/utils/timeControl";
 117 import { getRandString } from "@/utils/alea";
 118 import { getScoreMessage } from "@/utils/scoring";
 119 import { getFullNotation } from "@/utils/notation";
 120 import { getDiagram } from "@/utils/printDiagram";
 121 import { processModalClick } from "@/utils/modalClick";
 122 import { playMove, getFilteredMove } from "@/utils/playUndo";
 123 import { ArrayFun } from "@/utils/array";
 124 import params from "@/parameters";
 125 export default {
 126   name: "my-game",
 127   components: {
 128     BaseGame,
 129     Chat
 130   },
 131   data: function() {
 132     return {
 133       st: store.state,
 134       gameRef: {
 135         // rid = remote (socket) ID
 136         id: "",
 137         rid: ""
 138       },
 139       nextIds: [],
 140       game: {}, //passed to BaseGame
 141       // virtualClocks will be initialized from true game.clocks
 142       virtualClocks: [],
 143       vr: null, //"variant rules" object initialized from FEN
 144       drawOffer: "",
 145       people: {}, //players + observers
 146       onMygames: [], //opponents (or me) on "MyGames" page
 147       lastate: undefined, //used if opponent send lastate before game is ready
 148       repeat: {}, //detect position repetition
 149       curDiag: "", //for corr moves confirmation
 150       newChat: "",
 151       conn: null,
 152       roomInitialized: false,
 153       // If newmove has wrong index: ask fullgame again:
 154       askGameTime: 0,
 155       gameIsLoading: false,
 156       // If asklastate got no reply, ask again:
 157       gotLastate: false,
 158       gotMoveIdx: -1, //last move index received
 159       // If newmove got no pingback, send again:
 160       opponentGotMove: false,
 161       connexionString: "",
 162       // Intervals from setInterval():
 163       askLastate: null,
 164       retrySendmove: null,
 165       clockUpdate: null,
 166       // Related to (killing of) self multi-connects:
 167       newConnect: {},
 168       killed: {}
 169     };
 170   },
 171   watch: {
 172     $route: function(to, from) {
 173       if (from.params["id"] != to.params["id"]) {
 174         // Change everything:
 175         this.cleanBeforeDestroy();
 176         let boardDiv = document.querySelector(".game");
 177         if (!!boardDiv)
 178           // In case of incomplete information variant:
 179           boardDiv.style.visibility = "hidden";
 180         this.atCreation();
 181       } else {
 182         // Same game ID
 183         this.gameRef.id = to.params["id"];
 184         this.gameRef.rid = to.query["rid"];
 185         this.nextIds = JSON.parse(this.$route.query["next"] || "[]");
 186         this.loadGame();
 187       }
 188     }
 189   },
 190   // NOTE: some redundant code with Hall.vue (mostly related to people array)
 191   created: function() {
 192     this.atCreation();
 193   },
 194   mounted: function() {
 195     document
 196       .getElementById("chatWrap")
 197       .addEventListener("click", processModalClick);
 198     if ("ontouchstart" in window) {
 199       // Disable tooltips on smartphones:
 200       document.getElementsByClassName("tooltip").forEach(elt => {
 201         elt.classList.remove("tooltip");
 202       });
 203     }
 204   },
 205   beforeDestroy: function() {
 206     this.cleanBeforeDestroy();
 207   },
 208   methods: {
 209     atCreation: function() {
 210       // 0] (Re)Set variables
 211       this.gameRef.id = this.$route.params["id"];
 212       // rid = remote ID to find an observed live game,
 213       // next = next corr games IDs to navigate faster
 214       // (Both might be undefined)
 215       this.gameRef.rid = this.$route.query["rid"];
 216       this.nextIds = JSON.parse(this.$route.query["next"] || "[]");
 217       // Always add myself to players' list
 218       const my = this.st.user;
 219       this.$set(this.people, my.sid, { id: my.id, name: my.name });
 220       this.game = {
 221         players: [{ name: "" }, { name: "" }],
 222         chats: [],
 223         rendered: false
 224       };
 225       let chatComp = this.$refs["chatcomp"];
 226       if (!!chatComp) chatComp.chats = [];
 227       this.virtualClocks = [[0,0], [0,0]];
 228       this.vr = null;
 229       this.drawOffer = "";
 230       this.onMygames = [];
 231       this.lastate = undefined;
 232       this.newChat = "";
 233       this.roomInitialized = false;
 234       this.askGameTime = 0;
 235       this.gameIsLoading = false;
 236       this.gotLastate = false;
 237       this.gotMoveIdx = -1;
 238       this.opponentGotMove = false;
 239       this.askLastate = null;
 240       this.retrySendmove = null;
 241       this.clockUpdate = null;
 242       this.newConnect = {};
 243       this.killed = {};
 244       // 1] Initialize connection
 245       this.connexionString =
 246         params.socketUrl +
 247         "/?sid=" +
 248         this.st.user.sid +
 249         "&tmpId=" +
 250         getRandString() +
 251         "&page=" +
 252         // Discard potential "/?next=[...]" for page indication:
 253         encodeURIComponent(this.$route.path.match(/\/game\/[a-zA-Z0-9]+/)[0]);
 254       this.conn = new WebSocket(this.connexionString);
 255       this.conn.onmessage = this.socketMessageListener;
 256       this.conn.onclose = this.socketCloseListener;
 257       // Socket init required before loading remote game:
 258       const socketInit = callback => {
 259         if (!!this.conn && this.conn.readyState == 1)
 260           // 1 == OPEN state
 261           callback();
 262         else
 263           // Socket not ready yet (initial loading)
 264           // NOTE: it's important to call callback without arguments,
 265           // otherwise first arg is Websocket object and loadGame fails.
 266           this.conn.onopen = () => callback();
 267       };
 268       if (!this.gameRef.rid)
 269         // Game stored locally or on server
 270         this.loadGame(null, () => socketInit(this.roomInit));
 271       else
 272         // Game stored remotely: need socket to retrieve it
 273         // NOTE: the callback "roomInit" will be lost, so we don't provide it.
 274         // --> It will be given when receiving "fullgame" socket event.
 275         socketInit(this.loadGame);
 276     },
 277     cleanBeforeDestroy: function() {
 278       if (!!this.askLastate)
 279         clearInterval(this.askLastate);
 280       if (!!this.retrySendmove)
 281         clearInterval(this.retrySendmove);
 282       if (!!this.clockUpdate)
 283         clearInterval(this.clockUpdate);
 284       this.send("disconnect");
 285     },
 286     roomInit: function() {
 287       if (!this.roomInitialized) {
 288         // Notify the room only now that I connected, because
 289         // messages might be lost otherwise (if game loading is slow)
 290         this.send("connect");
 291         this.send("pollclients");
 292         // We may ask fullgame several times if some moves are lost,
 293         // but room should be init only once:
 294         this.roomInitialized = true;
 295       }
 296     },
 297     send: function(code, obj) {
 298       if (!!this.conn)
 299         this.conn.send(JSON.stringify(Object.assign({ code: code }, obj)));
 300     },
 301     isConnected: function(index) {
 302       const player = this.game.players[index];
 303       // Is it me ?
 304       if (this.st.user.sid == player.sid || this.st.user.id == player.uid)
 305         // Still have to check for name (because of potential multi-accounts
 306         // on same browser, although this should be rare...)
 307         return (!this.st.user.name || this.st.user.name == player.name);
 308       // Try to find a match in people:
 309       return (
 310         (
 311           player.sid &&
 312           Object.keys(this.people).some(sid => sid == player.sid)
 313         )
 314         ||
 315         (
 316           player.uid &&
 317           Object.values(this.people).some(p => p.id == player.uid)
 318         )
 319       );
 320     },
 321     resetChatColor: function() {
 322       // TODO: this is called twice, once on opening an once on closing
 323       document.getElementById("chatBtn").classList.remove("somethingnew");
 324     },
 325     processChat: function(chat) {
 326       this.send("newchat", { data: chat });
 327       // NOTE: anonymous chats in corr games are not stored on server (TODO?)
 328       if (this.game.type == "corr" && this.st.user.id > 0)
 329         this.updateCorrGame({ chat: chat });
 330     },
 331     clearChat: function() {
 332       // Nothing more to do if game is live (chats not recorded)
 333       if (this.game.type == "corr") {
 334         if (!!this.game.mycolor)
 335           ajax("/chats", "DELETE", {gid: this.game.id});
 336         this.$set(this.game, "chats", []);
 337       }
 338     },
 339     // Notify turn after a new move (to opponent and me on MyGames page)
 340     notifyTurn: function(sid) {
 341       const player = this.people[sid];
 342       const colorIdx = this.game.players.findIndex(
 343         p => p.sid == sid || p.uid == player.id);
 344       const color = ["w","b"][colorIdx];
 345       const movesCount = this.game.moves.length;
 346       const yourTurn =
 347         (color == "w" && movesCount % 2 == 0) ||
 348         (color == "b" && movesCount % 2 == 1);
 349       this.send("turnchange", { target: sid, yourTurn: yourTurn });
 350     },
 351     showNextGame: function() {
 352       // Did I play in current game? If not, add it to nextIds list
 353       if (this.game.score == "*" && this.vr.turn == this.game.mycolor)
 354         this.nextIds.unshift(this.game.id);
 355       const nextGid = this.nextIds.pop();
 356       this.$router.push(
 357         "/game/" + nextGid + "/?next=" + JSON.stringify(this.nextIds));
 358     },
 359     rematch: function() {
 360       alert("Unimplemented yet (soon :) )");
 361       // TODO: same logic as for draw, but re-click remove rematch offer (toggle)
 362     },
 363     askGameAgain: function() {
 364       this.gameIsLoading = true;
 365       const currentUrl = document.location.href;
 366       const doAskGame = () => {
 367         if (document.location.href != currentUrl) return; //page change
 368         if (!this.gameRef.rid)
 369           // This is my game: just reload.
 370           this.loadGame();
 371         else
 372           // Just ask fullgame again (once!), this is much simpler.
 373           // If this fails, the user could just reload page :/
 374           this.send("askfullgame", { target: this.gameRef.rid });
 375       };
 376       // Delay of at least 2s between two game requests
 377       const now = Date.now();
 378       const delay = Math.max(2000 - (now - this.askGameTime), 0);
 379       this.askGameTime = now;
 380       setTimeout(doAskGame, delay);
 381     },
 382     socketMessageListener: function(msg) {
 383       if (!this.conn) return;
 384       const data = JSON.parse(msg.data);
 385       switch (data.code) {
 386         case "pollclients":
 387           data.sockIds.forEach(sid => {
 388             if (sid != this.st.user.sid)
 389               this.send("askidentity", { target: sid });
 390           });
 391           break;
 392         case "connect":
 393           if (!this.people[data.from]) {
 394             this.newConnect[data.from] = true; //for self multi-connects tests
 395             this.send("askidentity", { target: data.from });
 396           }
 397           break;
 398         case "disconnect":
 399           this.$delete(this.people, data.from);
 400           break;
 401         case "mconnect": {
 402           // TODO: from MyGames page : send mconnect message with the list of gid (live and corr)
 403           // Either me (another tab) or opponent
 404           const sid = data.from;
 405           if (!this.onMygames.some(s => s == sid))
 406           {
 407             this.onMygames.push(sid);
 408             this.notifyTurn(sid); //TODO: this may require server ID (so, notify after receiving identity)
 409           }
 410           break;
 411           if (!this.people[sid])
 412             this.send("askidentity", { target: sid });
 413         }
 414         case "mdisconnect":
 415           ArrayFun.remove(this.onMygames, sid => sid == data.from);
 416           break;
 417         case "killed":
 418           // I logged in elsewhere:
 419           this.conn = null;
 420           alert(this.st.tr["New connexion detected: tab now offline"]);
 421           break;
 422         case "askidentity": {
 423           // Request for identification
 424           const me = {
 425             // Decompose to avoid revealing email
 426             name: this.st.user.name,
 427             sid: this.st.user.sid,
 428             id: this.st.user.id
 429           };
 430           this.send("identity", { data: me, target: data.from });
 431           break;
 432         }
 433         case "identity": {
 434           const user = data.data;
 435           this.$set(this.people, user.sid, { name: user.name, id: user.id });
 436           // If I multi-connect, kill current connexion if no mark (I'm older)
 437           if (this.newConnect[user.sid]) {
 438             if (
 439               user.id > 0 &&
 440               user.id == this.st.user.id &&
 441               user.sid != this.st.user.sid &&
 442               !this.killed[this.st.user.sid]
 443             ) {
 444                 this.send("killme", { sid: this.st.user.sid });
 445                 this.killed[this.st.user.sid] = true;
 446             }
 447             delete this.newConnect[user.sid];
 448           }
 449           if (!this.killed[this.st.user.sid]) {
 450             // Ask potentially missed last state, if opponent and I play
 451             if (
 452               !!this.game.mycolor &&
 453               this.game.type == "live" &&
 454               this.game.score == "*" &&
 455               this.game.players.some(p => p.sid == user.sid)
 456             ) {
 457               this.send("asklastate", { target: user.sid });
 458               let counter = 1;
 459               this.askLastate = setInterval(
 460                 () => {
 461                   // Ask at most 3 times:
 462                   // if no reply after that there should be a network issue.
 463                   if (
 464                     counter < 3 &&
 465                     !this.gotLastate &&
 466                     !!this.people[user.sid]
 467                   ) {
 468                     this.send("asklastate", { target: user.sid });
 469                     counter++;
 470                   } else {
 471                     clearInterval(this.askLastate);
 472                   }
 473                 },
 474                 1500
 475               );
 476             }
 477           }
 478           break;
 479         }
 480         case "askgame":
 481           // Send current (live) game if not asked by any of the players
 482           if (
 483             this.game.type == "live" &&
 484             this.game.players.every(p => p.sid != data.from[0])
 485           ) {
 486             const myGame = {
 487               id: this.game.id,
 488               fen: this.game.fen,
 489               players: this.game.players,
 490               vid: this.game.vid,
 491               cadence: this.game.cadence,
 492               score: this.game.score,
 493               rid: this.st.user.sid //useful in Hall if I'm an observer
 494             };
 495             this.send("game", { data: myGame, target: data.from });
 496           }
 497           break;
 498         case "askfullgame":
 499           const gameToSend = Object.keys(this.game)
 500             .filter(k =>
 501               [
 502                 "id","fen","players","vid","cadence","fenStart","vname",
 503                 "moves","clocks","initime","score","drawOffer"
 504               ].includes(k))
 505             .reduce(
 506               (obj, k) => {
 507                 obj[k] = this.game[k];
 508                 return obj;
 509               },
 510               {}
 511             );
 512           this.send("fullgame", { data: gameToSend, target: data.from });
 513           break;
 514         case "fullgame":
 515           // Callback "roomInit" to poll clients only after game is loaded
 516           this.loadGame(data.data, this.roomInit);
 517           break;
 518         case "asklastate":
 519           // Sending informative last state if I played a move or score != "*"
 520           if (
 521             (this.game.moves.length > 0 && this.vr.turn != this.game.mycolor) ||
 522             this.game.score != "*" ||
 523             this.drawOffer == "sent"
 524           ) {
 525             // Send our "last state" informations to opponent
 526             const L = this.game.moves.length;
 527             const myIdx = ["w", "b"].indexOf(this.game.mycolor);
 528             const myLastate = {
 529               lastMove: L > 0 ? this.game.moves[L - 1] : undefined,
 530               clock: this.game.clocks[myIdx],
 531               // Since we played a move (or abort or resign),
 532               // only drawOffer=="sent" is possible
 533               drawSent: this.drawOffer == "sent",
 534               score: this.game.score,
 535               movesCount: L,
 536               initime: this.game.initime[1 - myIdx] //relevant only if I played
 537             };
 538             this.send("lastate", { data: myLastate, target: data.from });
 539           } else {
 540             this.send("lastate", { data: {nothing: true}, target: data.from });
 541           }
 542           break;
 543         case "lastate": {
 544           // Got opponent infos about last move
 545           this.gotLastate = true;
 546           if (!data.data.nothing) {
 547             this.lastate = data.data;
 548             if (this.game.rendered)
 549               // Game is rendered (Board component)
 550               this.processLastate();
 551             // Else: will be processed when game is ready
 552           }
 553           break;
 554         }
 555         case "newmove": {
 556           const movePlus = data.data;
 557           const movesCount = this.game.moves.length;
 558           if (movePlus.index > movesCount) {
 559             // This can only happen if I'm an observer and missed a move.
 560             if (this.gotMoveIdx < movePlus.index)
 561               this.gotMoveIdx = movePlus.index;
 562             if (!this.gameIsLoading) this.askGameAgain();
 563           }
 564           else {
 565             if (
 566               movePlus.index < movesCount ||
 567               this.gotMoveIdx >= movePlus.index
 568             ) {
 569               // Opponent re-send but we already have the move:
 570               // (maybe he didn't receive our pingback...)
 571               this.send("gotmove", {data: movePlus.index, target: data.from});
 572             } else {
 573               this.gotMoveIdx = movePlus.index;
 574               const receiveMyMove = (movePlus.color == this.game.mycolor);
 575               if (!receiveMyMove && !!this.game.mycolor)
 576                 // Notify opponent that I got the move:
 577                 this.send("gotmove", {data: movePlus.index, target: data.from});
 578               if (movePlus.cancelDrawOffer) {
 579                 // Opponent refuses draw
 580                 this.drawOffer = "";
 581                 // NOTE for corr games: drawOffer reset by player in turn
 582                 if (
 583                   this.game.type == "live" &&
 584                   !!this.game.mycolor &&
 585                   !receiveMyMove
 586                 ) {
 587                   GameStorage.update(this.gameRef.id, { drawOffer: "" });
 588                 }
 589               }
 590               this.$refs["basegame"].play(movePlus.move, "received", null, true);
 591               this.processMove(
 592                 movePlus.move,
 593                 {
 594                   clock: movePlus.clock,
 595                   receiveMyMove: receiveMyMove
 596                 }
 597               );
 598             }
 599           }
 600           break;
 601         }
 602         case "gotmove": {
 603           this.opponentGotMove = true;
 604           // Now his clock starts running:
 605           const oppIdx = ['w','b'].indexOf(this.vr.turn);
 606           this.game.initime[oppIdx] = Date.now();
 607           this.re_setClocks();
 608           break;
 609         }
 610         case "resign":
 611           const score = data.side == "b" ? "1-0" : "0-1";
 612           const side = data.side == "w" ? "White" : "Black";
 613           this.gameOver(score, side + " surrender");
 614           break;
 615         case "abort":
 616           this.gameOver("?", "Stop");
 617           break;
 618         case "draw":
 619           this.gameOver("1/2", data.data);
 620           break;
 621         case "drawoffer":
 622           // NOTE: observers don't know who offered draw
 623           this.drawOffer = "received";
 624           break;
 625         case "newchat":
 626           this.newChat = data.data;
 627           if (!document.getElementById("modalChat").checked)
 628             document.getElementById("chatBtn").classList.add("somethingnew");
 629           break;
 630       }
 631     },
 632     socketCloseListener: function() {
 633       this.conn = new WebSocket(this.connexionString);
 634       this.conn.addEventListener("message", this.socketMessageListener);
 635       this.conn.addEventListener("close", this.socketCloseListener);
 636     },
 637     updateCorrGame: function(obj, callback) {
 638       ajax(
 639         "/games",
 640         "PUT",
 641         {
 642           gid: this.gameRef.id,
 643           newObj: obj
 644         },
 645         () => {
 646           if (!!callback) callback();
 647         }
 648       );
 649     },
 650     // lastate was received, but maybe game wasn't ready yet:
 651     processLastate: function() {
 652       const data = this.lastate;
 653       this.lastate = undefined; //security...
 654       const L = this.game.moves.length;
 655       if (data.movesCount > L) {
 656         // Just got last move from him
 657         this.$refs["basegame"].play(data.lastMove, "received", null, true);
 658         this.processMove(data.lastMove, { clock: data.clock });
 659       }
 660       if (data.drawSent) this.drawOffer = "received";
 661       if (data.score != "*") {
 662         this.drawOffer = "";
 663         if (this.game.score == "*")
 664           // TODO: also pass scoreMsg in lastate
 665           this.gameOver(data.score);
 666       }
 667     },
 668     clickDraw: function() {
 669       if (!this.game.mycolor) return; //I'm just spectator
 670       if (["received", "threerep"].includes(this.drawOffer)) {
 671         if (!confirm(this.st.tr["Accept draw?"])) return;
 672         const message =
 673           this.drawOffer == "received"
 674             ? "Mutual agreement"
 675             : "Three repetitions";
 676         this.send("draw", { data: message });
 677         this.gameOver("1/2", message);
 678       } else if (this.drawOffer == "") {
 679         // No effect if drawOffer == "sent"
 680         if (this.game.mycolor != this.vr.turn) {
 681           alert(this.st.tr["Draw offer only in your turn"]);
 682           return;
 683         }
 684         if (!confirm(this.st.tr["Offer draw?"])) return;
 685         this.drawOffer = "sent";
 686         this.send("drawoffer");
 687         if (this.game.type == "live") {
 688           GameStorage.update(
 689             this.gameRef.id,
 690             { drawOffer: this.game.mycolor }
 691           );
 692         } else this.updateCorrGame({ drawOffer: this.game.mycolor });
 693       }
 694     },
 695     abortGame: function() {
 696       if (!this.game.mycolor || !confirm(this.st.tr["Terminate game?"])) return;
 697       this.gameOver("?", "Stop");
 698       this.send("abort");
 699     },
 700     resign: function() {
 701       if (!this.game.mycolor || !confirm(this.st.tr["Resign the game?"]))
 702         return;
 703       this.send("resign", { data: this.game.mycolor });
 704       const score = this.game.mycolor == "w" ? "0-1" : "1-0";
 705       const side = this.game.mycolor == "w" ? "White" : "Black";
 706       this.gameOver(score, side + " surrender");
 707     },
 708     // 3 cases for loading a game:
 709     //  - from indexedDB (running or completed live game I play)
 710     //  - from server (one correspondance game I play[ed] or not)
 711     //  - from remote peer (one live game I don't play, finished or not)
 712     loadGame: function(game, callback) {
 713       const afterRetrieval = async game => {
 714         const vModule = await import("@/variants/" + game.vname + ".js");
 715         window.V = vModule.VariantRules;
 716         this.vr = new V(game.fen);
 717         const gtype = game.cadence.indexOf("d") >= 0 ? "corr" : "live";
 718         const tc = extractTime(game.cadence);
 719         const myIdx = game.players.findIndex(p => {
 720           return p.sid == this.st.user.sid || p.uid == this.st.user.id;
 721         });
 722         const mycolor = [undefined, "w", "b"][myIdx + 1]; //undefined for observers
 723         if (!game.chats) game.chats = []; //live games don't have chat history
 724         if (gtype == "corr") {
 725           if (game.players[0].color == "b") {
 726             // Adopt the same convention for live and corr games: [0] = white
 727             [game.players[0], game.players[1]] = [
 728               game.players[1],
 729               game.players[0]
 730             ];
 731           }
 732           // NOTE: clocks in seconds, initime in milliseconds
 733           game.moves.sort((m1, m2) => m1.idx - m2.idx); //in case of
 734           game.clocks = [tc.mainTime, tc.mainTime];
 735           const L = game.moves.length;
 736           if (game.score == "*") {
 737             // Set clocks + initime
 738             game.initime = [0, 0];
 739             if (L >= 1) {
 740               const gameLastupdate = game.moves[L-1].played;
 741               game.initime[L % 2] = gameLastupdate;
 742               if (L >= 2) {
 743                 game.clocks[L % 2] =
 744                   tc.mainTime - (Date.now() - gameLastupdate) / 1000;
 745               }
 746             }
 747           }
 748           // Sort chat messages from newest to oldest
 749           game.chats.sort((c1, c2) => {
 750             return c2.added - c1.added;
 751           });
 752           if (myIdx >= 0 && game.score == "*" && game.chats.length > 0) {
 753             // Did a chat message arrive after my last move?
 754             let dtLastMove = 0;
 755             if (L == 1 && myIdx == 0)
 756               dtLastMove = game.moves[0].played;
 757             else if (L >= 2) {
 758               if (L % 2 == 0) {
 759                 // It's now white turn
 760                 dtLastMove = game.moves[L-1-(1-myIdx)].played;
 761               } else {
 762                 // Black turn:
 763                 dtLastMove = game.moves[L-1-myIdx].played;
 764               }
 765             }
 766             if (dtLastMove < game.chats[0].added)
 767               document.getElementById("chatBtn").classList.add("somethingnew");
 768           }
 769           // Now that we used idx and played, re-format moves as for live games
 770           game.moves = game.moves.map(m => m.squares);
 771         }
 772         if (gtype == "live" && game.clocks[0] < 0) {
 773           // Game is unstarted
 774           game.clocks = [tc.mainTime, tc.mainTime];
 775           if (game.score == "*") {
 776             game.initime[0] = Date.now();
 777             if (myIdx >= 0) {
 778               // I play in this live game; corr games don't have clocks+initime
 779               GameStorage.update(game.id, {
 780                 clocks: game.clocks,
 781                 initime: game.initime
 782               });
 783             }
 784           }
 785         }
 786         if (!!game.drawOffer) {
 787           if (game.drawOffer == "t")
 788             // Three repetitions
 789             this.drawOffer = "threerep";
 790           else {
 791             // Draw offered by any of the players:
 792             if (myIdx < 0) this.drawOffer = "received";
 793             else {
 794               // I play in this game:
 795               if (
 796                 (game.drawOffer == "w" && myIdx == 0) ||
 797                 (game.drawOffer == "b" && myIdx == 1)
 798               )
 799                 this.drawOffer = "sent";
 800               else this.drawOffer = "received";
 801             }
 802           }
 803         }
 804         this.repeat = {}; //reset: scan past moves' FEN:
 805         let repIdx = 0;
 806         let vr_tmp = new V(game.fenStart);
 807         let curTurn = "n";
 808         game.moves.forEach(m => {
 809           playMove(m, vr_tmp);
 810           const fenIdx = vr_tmp.getFen().replace(/ /g, "_");
 811           this.repeat[fenIdx] = this.repeat[fenIdx]
 812             ? this.repeat[fenIdx] + 1
 813             : 1;
 814         });
 815         if (this.repeat[repIdx] >= 3) this.drawOffer = "threerep";
 816         this.game = Object.assign(
 817           // NOTE: assign mycolor here, since BaseGame could also be VS computer
 818           {
 819             type: gtype,
 820             increment: tc.increment,
 821             mycolor: mycolor,
 822             // opponent sid not strictly required (or available), but easier
 823             // at least oppsid or oppid is available anyway:
 824             oppsid: myIdx < 0 ? undefined : game.players[1 - myIdx].sid,
 825             oppid: myIdx < 0 ? undefined : game.players[1 - myIdx].uid
 826           },
 827           game,
 828         );
 829         if (this.gameIsLoading)
 830           // Re-load game because we missed some moves:
 831           // artificially reset BaseGame (required if moves arrived in wrong order)
 832           this.$refs["basegame"].re_setVariables();
 833         else {
 834           // Initial loading:
 835           this.gotMoveIdx = game.moves.length - 1;
 836           // If we arrive here after 'nextGame' action, the board might be hidden
 837           let boardDiv = document.querySelector(".game");
 838           if (!!boardDiv && boardDiv.style.visibility == "hidden")
 839             boardDiv.style.visibility = "visible";
 840         }
 841         this.re_setClocks();
 842         this.$nextTick(() => {
 843           this.game.rendered = true;
 844           // Did lastate arrive before game was rendered?
 845           if (this.lastate) this.processLastate();
 846         });
 847         if (this.gameIsLoading) {
 848           this.gameIsLoading = false;
 849           if (this.gotMoveIdx >= game.moves.length)
 850             // Some moves arrived meanwhile...
 851             this.askGameAgain();
 852         }
 853         if (!!callback) callback();
 854       };
 855       if (!!game) {
 856         afterRetrieval(game);
 857         return;
 858       }
 859       if (this.gameRef.rid) {
 860         // Remote live game: forgetting about callback func... (TODO: design)
 861         this.send("askfullgame", { target: this.gameRef.rid });
 862       } else {
 863         // Local or corr game on server.
 864         // NOTE: afterRetrieval() is never called if game not found
 865         const gid = this.gameRef.id;
 866         if (Number.isInteger(gid) || !isNaN(parseInt(gid))) {
 867           // corr games identifiers are integers
 868           ajax("/games", "GET", { gid: gid }, res => {
 869             let g = res.game;
 870             g.moves.forEach(m => {
 871               m.squares = JSON.parse(m.squares);
 872             });
 873             afterRetrieval(g);
 874           });
 875         }
 876         else
 877           // Local game
 878           GameStorage.get(this.gameRef.id, afterRetrieval);
 879       }
 880     },
 881     re_setClocks: function() {
 882       if (this.game.moves.length < 2 || this.game.score != "*") {
 883         // 1st move not completed yet, or game over: freeze time
 884         this.virtualClocks = this.game.clocks.map(s => ppt(s).split(':'));
 885         return;
 886       }
 887       const currentTurn = this.vr.turn;
 888       const currentMovesCount = this.game.moves.length;
 889       const colorIdx = ["w", "b"].indexOf(currentTurn);
 890       let countdown =
 891         this.game.clocks[colorIdx] -
 892         (Date.now() - this.game.initime[colorIdx]) / 1000;
 893       this.virtualClocks = [0, 1].map(i => {
 894         const removeTime =
 895           i == colorIdx ? (Date.now() - this.game.initime[colorIdx]) / 1000 : 0;
 896         return ppt(this.game.clocks[i] - removeTime).split(':');
 897       });
 898       this.clockUpdate = setInterval(
 899         () => {
 900           if (
 901             countdown < 0 ||
 902             this.game.moves.length > currentMovesCount ||
 903             this.game.score != "*"
 904           ) {
 905             clearInterval(this.clockUpdate);
 906             if (countdown < 0)
 907               this.gameOver(
 908                 currentTurn == "w" ? "0-1" : "1-0",
 909                 "Time"
 910               );
 911           } else
 912             this.$set(
 913               this.virtualClocks,
 914               colorIdx,
 915               ppt(Math.max(0, --countdown)).split(':')
 916             );
 917         },
 918         1000
 919       );
 920     },
 921     // Update variables and storage after a move:
 922     processMove: function(move, data) {
 923       if (!data) data = {};
 924       const moveCol = this.vr.turn;
 925       const doProcessMove = () => {
 926         const colorIdx = ["w", "b"].indexOf(moveCol);
 927         const nextIdx = 1 - colorIdx;
 928         const origMovescount = this.game.moves.length;
 929         let addTime = 0; //for live games
 930         if (moveCol == this.game.mycolor && !data.receiveMyMove) {
 931           if (this.drawOffer == "received")
 932             // I refuse draw
 933             this.drawOffer = "";
 934           if (this.game.type == "live" && origMovescount >= 2) {
 935             const elapsed = Date.now() - this.game.initime[colorIdx];
 936             // elapsed time is measured in milliseconds
 937             addTime = this.game.increment - elapsed / 1000;
 938           }
 939         }
 940         // Update current game object:
 941         playMove(move, this.vr);
 942         // The move is played: stop clock
 943         clearInterval(this.clockUpdate);
 944         if (!data.score) {
 945           // Received move, score has not been computed in BaseGame (!!noemit)
 946           const score = this.vr.getCurrentScore();
 947           if (score != "*") this.gameOver(score);
 948         }
 949 // TODO: notifyTurn: "changeturn" message
 950         this.game.moves.push(move);
 951         this.game.fen = this.vr.getFen();
 952         if (this.game.type == "live") {
 953           if (!!data.clock) this.game.clocks[colorIdx] = data.clock;
 954           else this.game.clocks[colorIdx] += addTime;
 955         }
 956         // In corr games, just reset clock to mainTime:
 957         else {
 958           this.game.clocks[colorIdx] = extractTime(this.game.cadence).mainTime;
 959         }
 960         // NOTE: opponent's initime is reset after "gotmove" is received
 961         if (
 962           !this.game.mycolor ||
 963           moveCol != this.game.mycolor ||
 964           !!data.receiveMyMove
 965         ) {
 966           this.game.initime[nextIdx] = Date.now();
 967         }
 968         // If repetition detected, consider that a draw offer was received:
 969         const fenObj = this.vr.getFenForRepeat();
 970         this.repeat[fenObj] =
 971           !!this.repeat[fenObj]
 972             ? this.repeat[fenObj] + 1
 973             : 1;
 974         if (this.repeat[fenObj] >= 3) this.drawOffer = "threerep";
 975         else if (this.drawOffer == "threerep") this.drawOffer = "";
 976         if (!!this.game.mycolor && !data.receiveMyMove) {
 977           // NOTE: 'var' to see that variable outside this block
 978           var filtered_move = getFilteredMove(move);
 979         }
 980         // Since corr games are stored at only one location, update should be
 981         // done only by one player for each move:
 982         if (
 983           !!this.game.mycolor &&
 984           !data.receiveMyMove &&
 985           (this.game.type == "live" || moveCol == this.game.mycolor)
 986         ) {
 987           let drawCode = "";
 988           switch (this.drawOffer) {
 989             case "threerep":
 990               drawCode = "t";
 991               break;
 992             case "sent":
 993               drawCode = this.game.mycolor;
 994               break;
 995             case "received":
 996               drawCode = V.GetOppCol(this.game.mycolor);
 997               break;
 998           }
 999           if (this.game.type == "corr") {
1000             // corr: only move, fen and score
1001             this.updateCorrGame({
1002               fen: this.game.fen,
1003               move: {
1004                 squares: filtered_move,
1005                 played: Date.now(),
1006                 idx: origMovescount
1007               },
1008               // Code "n" for "None" to force reset (otherwise it's ignored)
1009               drawOffer: drawCode || "n"
1010             });
1011           }
1012           else {
1013             const updateStorage = () => {
1014               GameStorage.update(this.gameRef.id, {
1015                 fen: this.game.fen,
1016                 move: filtered_move,
1017                 moveIdx: origMovescount,
1018                 clocks: this.game.clocks,
1019                 initime: this.game.initime,
1020                 drawOffer: drawCode
1021               });
1022             };
1023             // The active tab can update storage immediately
1024             if (!document.hidden) updateStorage();
1025             // Small random delay otherwise
1026             else setTimeout(updateStorage, 500 + 1000 * Math.random());
1027           }
1028         }
1029         // Send move ("newmove" event) to people in the room (if our turn)
1030         if (moveCol == this.game.mycolor && !data.receiveMyMove) {
1031           let sendMove = {
1032             move: filtered_move,
1033             index: origMovescount,
1034             // color is required to check if this is my move (if several tabs opened)
1035             color: moveCol,
1036             cancelDrawOffer: this.drawOffer == ""
1037           };
1038           if (this.game.type == "live")
1039             sendMove["clock"] = this.game.clocks[colorIdx];
1040           this.opponentGotMove = false;
1041           this.send("newmove", {data: sendMove});
1042           // If the opponent doesn't reply gotmove soon enough, re-send move:
1043           // Do this at most 2 times, because mpore would mean network issues,
1044           // opponent would then be expected to disconnect/reconnect.
1045           let counter = 1;
1046           const currentUrl = document.location.href;
1047           this.retrySendmove = setInterval(
1048             () => {
1049               if (
1050                 counter >= 3 ||
1051                 this.opponentGotMove ||
1052                 document.location.href != currentUrl //page change
1053               ) {
1054                 clearInterval(this.retrySendmove);
1055                 return;
1056               }
1057               let oppsid = this.game.players[nextIdx].sid;
1058               if (!oppsid) {
1059                 oppsid = Object.keys(this.people).find(
1060                   sid => this.people[sid].id == this.game.players[nextIdx].uid
1061                 );
1062               }
1063               if (!oppsid || !this.people[oppsid])
1064                 // Opponent is disconnected: he'll ask last state
1065                 clearInterval(this.retrySendmove);
1066               else {
1067                 this.send("newmove", { data: sendMove, target: oppsid });
1068                 counter++;
1069               }
1070             },
1071             1500
1072           );
1073         }
1074         else
1075           // Not my move or I'm an observer: just start other player's clock
1076           this.re_setClocks();
1077       };
1078       if (
1079         this.game.type == "corr" &&
1080         moveCol == this.game.mycolor &&
1081         !data.receiveMyMove
1082       ) {
1083         const afterSetScore = () => {
1084           doProcessMove();
1085           if (this.st.settings.gotonext && this.nextIds.length > 0)
1086             this.showNextGame();
1087           else {
1088             // The board might have been hidden:
1089             let boardDiv = document.querySelector(".game");
1090             if (boardDiv.style.visibility == "hidden")
1091               boardDiv.style.visibility = "visible";
1092           }
1093         };
1094         if (["all","byrow"].includes(V.ShowMoves)) {
1095           let el = document.querySelector("#buttonsConfirm > .acceptBtn");
1096           // We may play several moves in a row: in case of, remove listener:
1097           let elClone = el.cloneNode(true);
1098           el.parentNode.replaceChild(elClone, el);
1099           elClone.addEventListener(
1100             "click",
1101             () => {
1102               document.getElementById("modalConfirm").checked = false;
1103               if (!!data.score && data.score != "*")
1104                 // Set score first
1105                 this.gameOver(data.score, null, afterSetScore);
1106               else afterSetScore();
1107             }
1108           );
1109           // PlayOnBoard is enough, and more appropriate for Synchrone Chess
1110           V.PlayOnBoard(this.vr.board, move);
1111           const position = this.vr.getBaseFen();
1112           V.UndoOnBoard(this.vr.board, move);
1113           this.curDiag = getDiagram({
1114             position: position,
1115             orientation: V.CanFlip ? this.game.mycolor : "w"
1116           });
1117           document.getElementById("modalConfirm").checked = true;
1118         } else {
1119           // Incomplete information: just ask confirmation
1120           // Hide the board, because otherwise it could be revealed (TODO?)
1121           let boardDiv = document.querySelector(".game");
1122           boardDiv.style.visibility = "hidden";
1123           if (
1124             !confirm(
1125               this.st.tr["Move played:"] + " " +
1126               getFullNotation(move) + "\n" +
1127               this.st.tr["Are you sure?"]
1128             )
1129           ) {
1130             this.$refs["basegame"].cancelLastMove();
1131             boardDiv.style.visibility = "visible";
1132             return;
1133           }
1134           if (!!data.score && data.score != "*")
1135             this.gameOver(data.score, null, afterSetScore);
1136           else afterSetScore();
1137         }
1138       }
1139       else {
1140         // Normal situation
1141         if (!!data.score && data.score != "*")
1142           this.gameOver(data.score, null, doProcessMove);
1143         else doProcessMove();
1144       }
1145     },
1146     cancelMove: function() {
1147       document.getElementById("modalConfirm").checked = false;
1148       this.$refs["basegame"].cancelLastMove();
1149     },
1150     // In corr games, callback to change page only after score is set:
1151     gameOver: function(score, scoreMsg, callback) {
1152       this.game.score = score;
1153       if (!scoreMsg) scoreMsg = getScoreMessage(score);
1154       this.$set(this.game, "scoreMsg", scoreMsg);
1155       const myIdx = this.game.players.findIndex(p => {
1156         return p.sid == this.st.user.sid || p.uid == this.st.user.id;
1157       });
1158       if (myIdx >= 0) {
1159         // OK, I play in this game
1160         const scoreObj = {
1161           score: score,
1162           scoreMsg: scoreMsg
1163         };
1164         if (this.game.type == "live") {
1165           GameStorage.update(this.gameRef.id, scoreObj);
1166           if (!!callback) callback();
1167         }
1168         else this.updateCorrGame(scoreObj, callback);
1169         // Notify the score to main Hall. TODO: only one player (currently double send)
1170         this.send("result", { gid: this.game.id, score: score });
1171       }
1172       else if (!!callback) callback();
1173     }
1174   }
1175 };
1176 </script>
1177
1178 <style lang="sass" scoped>
1179 .connected
1180   background-color: lightgreen
1181
1182 #participants
1183   margin-left: 5px
1184
1185 .anonymous
1186   color: grey
1187   font-style: italic
1188
1189 #playersInfo > p
1190   margin: 0
1191
1192 @media screen and (min-width: 768px)
1193   #actions
1194     width: 300px
1195 @media screen and (max-width: 767px)
1196   .game
1197     width: 100%
1198
1199 #actions
1200   display: inline-block
1201   margin: 0
1202
1203 button
1204   display: inline-block
1205   margin: 0
1206   display: inline-flex
1207   img
1208     height: 24px
1209     display: flex
1210     @media screen and (max-width: 767px)
1211       height: 18px
1212
1213 @media screen and (max-width: 767px)
1214   #aboveBoard
1215     text-align: center
1216 @media screen and (min-width: 768px)
1217   #aboveBoard
1218     margin-left: 30%
1219
1220 .variant-cadence
1221   padding-right: 10px
1222
1223 .variant-name
1224   font-weight: bold
1225   padding-right: 10px
1226
1227 span#nextGame
1228   background-color: #edda99
1229   cursor: pointer
1230   display: inline-block
1231   margin-right: 10px
1232
1233 span.name
1234   font-size: 1.5rem
1235   padding: 0 3px
1236
1237 span.time
1238   font-size: 2rem
1239   display: inline-block
1240   .time-left
1241     margin-left: 10px
1242   .time-right
1243     margin-left: 5px
1244   .time-separator
1245     margin-left: 5px
1246     position: relative
1247     top: -1px
1248
1249 span.yourturn
1250   color: #831B1B
1251   .time-separator
1252     animation: blink-animation 2s steps(3, start) infinite
1253 @keyframes blink-animation
1254   to
1255     visibility: hidden
1256
1257 .split-names
1258   display: inline-block
1259   margin: 0 15px
1260
1261 #chatWrap > .card
1262   padding-top: 20px
1263   max-width: 767px
1264   border: none
1265
1266 #confirmDiv > .card
1267   max-width: 767px
1268   max-height: 100%
1269
1270 .draw-sent, .draw-sent:hover
1271   background-color: lightyellow
1272
1273 .draw-received, .draw-received:hover
1274   background-color: lightgreen
1275
1276 .draw-threerep, .draw-threerep:hover
1277   background-color: #e4d1fc
1278
1279 .somethingnew
1280   background-color: #c5fefe
1281
1282 .diagram
1283   margin: 0 auto
1284   max-width: 400px
1285   // width: 100% required for Firefox
1286   width: 100%
1287
1288 #buttonsConfirm
1289   margin: 0
1290   & > button > span
1291     width: 100%
1292     text-align: center
1293
1294 button.acceptBtn
1295   background-color: lightgreen
1296 button.refuseBtn
1297   background-color: red
1298 </style>