client/src/views/Hall.vue

   1 <template lang="pug">
   2 main
   3   input#modalInfo.modal(type="checkbox")
   4   div#infoDiv(
   5     role="dialog"
   6     data-checkbox="modalInfo"
   7   )
   8     .card.text-center
   9       label.modal-close(for="modalInfo")
  10       p(v-html="infoMessage")
  11   input#modalAccept.modal(type="checkbox")
  12   div#acceptDiv(role="dialog")
  13     .card
  14       p.text-center
  15         span.variantName {{ curChallToAccept.vname }}
  16         span {{ curChallToAccept.cadence }}
  17         span {{ st.tr["with"] + " " + curChallToAccept.from.name }}
  18       .diagram(
  19         v-if="!!curChallToAccept.fen"
  20         v-html="tchallDiag"
  21       )
  22       .button-group#buttonsTchall(:style="tchallButtonsMargin()")
  23         button.acceptBtn(@click="decisionChallenge(true)")
  24           span {{ st.tr["Accept challenge?"] }}
  25         button.refuseBtn(@click="decisionChallenge(false)")
  26           span {{ st.tr["Refuse"] }}
  27   input#modalNewgame.modal(
  28     type="checkbox"
  29     @change="cadenceFocusIfOpened($event)"
  30   )
  31   div#newgameDiv(
  32     role="dialog"
  33     data-checkbox="modalNewgame"
  34   )
  35     .card
  36       label#closeNewgame.modal-close(for="modalNewgame")
  37       div(@keyup.enter="issueNewChallenge()")
  38         fieldset
  39           label(for="selectVariant") {{ st.tr["Variant"] }} *
  40           select#selectVariant(
  41             @change="loadNewchallVariant(trySetNewchallDiag)"
  42             v-model="newchallenge.vid"
  43           )
  44             option(
  45               v-for="v in st.variants"
  46               :value="v.id"
  47               :selected="newchallenge.vid==v.id"
  48             )
  49               | {{ v.name }}
  50         fieldset
  51           label(for="cadence") {{ st.tr["Cadence"] }} *
  52           div#predefinedCadences
  53             button(type="button") 15+5
  54             button(type="button") 45+30
  55             button(type="button") 3d
  56             button(type="button") 7d
  57           input#cadence(
  58             type="text"
  59             v-model="newchallenge.cadence"
  60             placeholder="5+0, 1h+30s, 5d ..."
  61           )
  62         fieldset
  63           label(for="selectRandomLevel") {{ st.tr["Randomness"] }} *
  64           select#selectRandomLevel(v-model="newchallenge.randomness")
  65             option(value="0") {{ st.tr["Deterministic"] }}
  66             option(value="1") {{ st.tr["Symmetric random"] }}
  67             option(value="2") {{ st.tr["Asymmetric random"] }}
  68         fieldset
  69           label(for="memorizeChall") {{ st.tr["Memorize"] }}
  70           input#memorizeChall(
  71             type="checkbox"
  72             v-model="newchallenge.memorize"
  73           )
  74         fieldset(v-if="st.user.id > 0")
  75           label(for="selectPlayers") {{ st.tr["Play with"] }}
  76           select#selectPlayersInList(
  77             v-model="newchallenge.to"
  78             @change="changeChallTarget()"
  79           )
  80             option(value="")
  81             option(
  82               v-for="p in Object.values(people)"
  83               v-if="!!p.name"
  84               :value="p.name"
  85             )
  86               | {{ p.name }}
  87           input#selectPlayers(
  88             type="text"
  89             v-model="newchallenge.to"
  90           )
  91         fieldset(v-if="st.user.id > 0 && newchallenge.to.length > 0")
  92           input#inputFen(
  93             placeholder="FEN"
  94             @input="trySetNewchallDiag()"
  95             type="text"
  96             v-model="newchallenge.fen"
  97           )
  98         .diagram(v-html="newchallenge.diag")
  99       button(@click="issueNewChallenge()") {{ st.tr["Send challenge"] }}
 100   input#modalPeople.modal(
 101     type="checkbox"
 102     @click="toggleSocialColor()"
 103   )
 104   div#peopleWrap(
 105     role="dialog"
 106     data-checkbox="modalPeople"
 107   )
 108     .card
 109       label.modal-close(for="modalPeople")
 110       #people
 111         #players
 112           p(
 113             v-for="sid in Object.keys(people)"
 114             v-if="!!people[sid].name"
 115           )
 116             UserBio.user-bio(:uid="people[sid].id" :uname="people[sid].name")
 117             button.player-action(
 118               v-if="isGamer(sid)"
 119               @click="watchGame(sid)"
 120             )
 121               | {{ st.tr["Observe"] }}
 122             button.player-action(
 123               v-else-if="isFocusedOnHall(sid)"
 124               @click="challenge(sid)"
 125             )
 126               | {{ st.tr["Challenge"] }}
 127           p.anonymous @nonymous ({{ anonymousCount() }})
 128         #chat
 129           Chat(
 130             ref="chatcomp"
 131             @mychat="processChat"
 132             :pastChats="[]"
 133           )
 134         .clearer
 135   .row
 136     .col-sm-12.col-md-10.col-md-offset-1.col-lg-8.col-lg-offset-2
 137       .button-group
 138         button#peopleBtn(onClick="window.doClick('modalPeople')")
 139           | {{ st.tr["Who's there?"] }}
 140         button(@click="showNewchallengeForm()")
 141           | {{ st.tr["New game"] }}
 142   .row(v-if="presetChalls.length > 0")
 143     .col-sm-12.col-md-10.col-md-offset-1.col-lg-8.col-lg-offset-2
 144       h4.text-center {{ st.tr["Preset challenges"] }}
 145       table
 146         thead
 147           tr
 148             th {{ st.tr["Variant"] }}
 149             th {{ st.tr["Cadence"] }}
 150             th {{ st.tr["Random?"] }}
 151             th
 152         tbody
 153           tr(
 154             v-for="pc in presetChalls"
 155             @click="newChallFromPreset(pc)"
 156           )
 157             td {{ pc.vname }}
 158             td {{ pc.cadence }}
 159             td(:class="getRandomnessClass(pc)")
 160             td.remove-preset(@click="removePresetChall($event, pc)")
 161               img(src="/images/icons/delete.svg")
 162   .row
 163     .col-sm-12.col-md-10.col-md-offset-1.col-lg-8.col-lg-offset-2
 164       div#div2
 165         .button-group
 166           button.tabbtn#btnClive(@click="setDisplay('c','live',$event)")
 167             | {{ st.tr["Live challenges"] }}
 168           button.tabbtn#btnCcorr(@click="setDisplay('c','corr',$event)")
 169             | {{ st.tr["Correspondence challenges"] }}
 170         ChallengeList(
 171           v-show="cdisplay=='live'"
 172           :challenges="filterChallenges('live')"
 173           @click-challenge="clickChallenge"
 174         )
 175         ChallengeList(
 176           v-show="cdisplay=='corr'"
 177           :challenges="filterChallenges('corr')"
 178           @click-challenge="clickChallenge"
 179         )
 180       div#div3
 181         .button-group
 182           button.tabbtn#btnGlive(@click="setDisplay('g','live',$event)")
 183             | {{ st.tr["Live games"] }}
 184           button.tabbtn#btnGcorr(@click="setDisplay('g','corr',$event)")
 185             | {{ st.tr["Correspondence games"] }}
 186         GameList(
 187           v-show="gdisplay=='live'"
 188           :games="filterGames('live')"
 189           :show-both="true"
 190           @show-game="showGame"
 191         )
 192         div(v-show="gdisplay=='corr'")
 193           GameList(
 194             :games="filterGames('corr')"
 195             :show-both="true"
 196             @show-game="showGame"
 197           )
 198           button#loadMoreBtn(
 199             v-if="hasMore"
 200             @click="loadMoreCorr()"
 201           )
 202             | {{ st.tr["Load more"] }}
 203 </template>
 204
 205 <script>
 206 import { store } from "@/store";
 207 import { checkChallenge } from "@/data/challengeCheck";
 208 import { notify } from "@/utils/notifications";
 209 import { ArrayFun } from "@/utils/array";
 210 import { ajax } from "@/utils/ajax";
 211 import params from "@/parameters";
 212 import { getRandString, shuffle, randInt } from "@/utils/alea";
 213 import { getDiagram } from "@/utils/printDiagram";
 214 import Chat from "@/components/Chat.vue";
 215 import UserBio from "@/components/UserBio.vue";
 216 import GameList from "@/components/GameList.vue";
 217 import ChallengeList from "@/components/ChallengeList.vue";
 218 import { GameStorage } from "@/utils/gameStorage";
 219 import { processModalClick } from "@/utils/modalClick";
 220 export default {
 221   name: "my-hall",
 222   components: {
 223     Chat,
 224     UserBio,
 225     GameList,
 226     ChallengeList
 227   },
 228   data: function() {
 229     return {
 230       st: store.state,
 231       cdisplay: "live", //or corr
 232       gdisplay: "live",
 233       // timestamp of last showed (oldest) corr game:
 234       cursor: Number.MAX_SAFE_INTEGER,
 235       // hasMore == TRUE: a priori there could be more games to load
 236       hasMore: true,
 237       games: [],
 238       challenges: [],
 239       people: {},
 240       infoMessage: "",
 241       newchallenge: {
 242         fen: "",
 243         vid: parseInt(localStorage.getItem("vid")) || 0,
 244         to: "", //name of challenged player (if any)
 245         cadence: localStorage.getItem("cadence") || "",
 246         randomness:
 247           // Warning: randomness can be 0, then !!randomness is false
 248           (parseInt(localStorage.getItem("challRandomness"))+1 || 3) - 1,
 249         // VariantRules object, stored to not interfere with
 250         // diagrams of targetted challenges:
 251         V: null,
 252         vname: "",
 253         diag: "", //visualizing FEN
 254         memorize: false //put settings in localStorage
 255       },
 256       focus: true,
 257       tchallDiag: "",
 258       curChallToAccept: {from: {}},
 259       presetChalls: JSON.parse(localStorage.getItem("presetChalls") || "[]"),
 260       conn: null,
 261       connexionString: "",
 262       socketCloseListener: 0,
 263       // Related to (killing of) self multi-connects:
 264       newConnect: {}
 265     };
 266   },
 267   watch: {
 268     // st.variants changes only once, at loading from [] to [...]
 269     "st.variants": function() {
 270       // Set potential challenges and games variant names:
 271       this.challenges.concat(this.games).forEach(o => {
 272         if (!o.vname) o.vname = this.getVname(o.vid);
 273       });
 274       if (!this.newchallenge.V && this.newchallenge.vid > 0)
 275         this.loadNewchallVariant();
 276     },
 277     $route: function(to, from) {
 278       if (to.path != "/") this.cleanBeforeDestroy();
 279     }
 280   },
 281   created: function() {
 282     document.addEventListener('visibilitychange', this.visibilityChange);
 283     window.addEventListener('focus', this.onFocus);
 284     window.addEventListener('blur', this.onBlur);
 285     window.addEventListener("beforeunload", this.cleanBeforeDestroy);
 286     if (this.st.variants.length > 0 && this.newchallenge.vid > 0)
 287       this.loadNewchallVariant();
 288     const my = this.st.user;
 289     const tmpId = getRandString();
 290     this.$set(
 291       this.people,
 292       my.sid,
 293       {
 294         id: my.id,
 295         name: my.name,
 296         tmpIds: {
 297           tmpId: { page: "/", focus: true }
 298         }
 299       }
 300     );
 301     const connectAndPoll = () => {
 302       this.send("connect");
 303       this.send("pollclientsandgamers");
 304     };
 305     // Initialize connection
 306     this.connexionString =
 307       params.socketUrl +
 308       "/?sid=" + this.st.user.sid +
 309       "&id=" + this.st.user.id +
 310       "&tmpId=" + tmpId +
 311       "&page=" +
 312       // Hall: path is "/" (TODO: could be hard-coded as well)
 313       encodeURIComponent(this.$route.path);
 314     this.conn = new WebSocket(this.connexionString);
 315     this.conn.onopen = connectAndPoll;
 316     this.conn.addEventListener("message", this.socketMessageListener);
 317     this.socketCloseListener = setInterval(
 318       () => {
 319         if (this.conn.readyState == 3) {
 320           this.conn.removeEventListener("message", this.socketMessageListener);
 321           this.conn = new WebSocket(this.connexionString);
 322           this.conn.addEventListener("message", this.socketMessageListener);
 323         }
 324       },
 325       1000
 326     );
 327   },
 328   mounted: function() {
 329     document.getElementById("peopleWrap")
 330       .addEventListener("click", (e) => {
 331         processModalClick(e, () => {
 332           this.toggleSocialColor("close")
 333         });
 334       });
 335     ["infoDiv", "newgameDiv"].forEach(eltName => {
 336       document.getElementById(eltName)
 337         .addEventListener("click", processModalClick);
 338     });
 339     document.querySelectorAll("#predefinedCadences > button").forEach(b => {
 340       b.addEventListener("click", () => {
 341         this.newchallenge.cadence = b.innerHTML;
 342       });
 343     });
 344     const dispCorr = this.$route.query["disp"];
 345     const showCtype =
 346       dispCorr || localStorage.getItem("type-challenges") || "live";
 347     const showGtype =
 348       dispCorr || localStorage.getItem("type-games") || "live";
 349     this.setDisplay('c', showCtype);
 350     this.setDisplay('g', showGtype);
 351     // Ask server for current corr games (all but mines)
 352     this.loadMoreCorr();
 353     // Also ask for corr challenges (open + sent by/to me)
 354     // List them all, because they are not supposed to be that many (TODO?)
 355     ajax(
 356       "/challenges",
 357       "GET",
 358       {
 359         data: { uid: this.st.user.id },
 360         success: (response) => {
 361           if (
 362             response.challenges.length > 0 &&
 363             this.challenges.length == 0 &&
 364             this.cdisplay == "live"
 365           ) {
 366             document
 367               .getElementById("btnCcorr")
 368               .classList.add("somethingnew");
 369           }
 370           // Gather all senders names, and then retrieve full identity:
 371           // (TODO [perf]: some might be online...)
 372           let names = {};
 373           response.challenges.forEach(c => {
 374             if (c.uid != this.st.user.id) names[c.uid] = "";
 375             else if (!!c.target && c.target != this.st.user.id)
 376               names[c.target] = "";
 377           });
 378           const addChallenges = () => {
 379             names[this.st.user.id] = this.st.user.name; //in case of
 380             this.challenges = this.challenges.concat(
 381               response.challenges.map(c => {
 382                 const from = { name: names[c.uid], id: c.uid }; //or just name
 383                 const type = this.classifyObject(c);
 384                 const vname = this.getVname(c.vid);
 385                 return Object.assign(
 386                   {},
 387                   {
 388                     type: type,
 389                     vname: vname,
 390                     from: from,
 391                     to: c.target ? names[c.target] : ""
 392                   },
 393                   c
 394                 );
 395               })
 396             );
 397           };
 398           if (Object.keys(names).length > 0) {
 399             ajax(
 400               "/users",
 401               "GET",
 402               {
 403                 data: { ids: Object.keys(names).join(",") },
 404                 success: (response2) => {
 405                   response2.users.forEach(u => {
 406                     names[u.id] = u.name;
 407                   });
 408                   addChallenges();
 409                 }
 410               }
 411             );
 412           } else addChallenges();
 413         }
 414       }
 415     );
 416   },
 417   beforeDestroy: function() {
 418     this.cleanBeforeDestroy();
 419   },
 420   methods: {
 421     cleanBeforeDestroy: function() {
 422       clearInterval(this.socketCloseListener);
 423       document.removeEventListener('visibilitychange', this.visibilityChange);
 424       window.removeEventListener('focus', this.onFocus);
 425       window.removeEventListener('blur', this.onBlur);
 426       window.removeEventListener("beforeunload", this.cleanBeforeDestroy);
 427       this.conn.removeEventListener("message", this.socketMessageListener);
 428       this.send("disconnect");
 429       this.conn = null;
 430     },
 431     getRandomnessClass: function(pc) {
 432       return {
 433         ["random-" + pc.randomness]: true
 434       };
 435     },
 436     anonymousCount: function() {
 437       let count = 0;
 438       Object.values(this.people).forEach(p => {
 439         // Do not cound people who did not send their identity yet:
 440         count += (!p.name && p.id === 0) ? 1 : 0;
 441       });
 442       return count;
 443     },
 444     visibilityChange: function() {
 445       // TODO: Use document.hidden? https://webplatform.news/issues/2019-03-27
 446       this.focus = (document.visibilityState == "visible");
 447       this.send(this.focus ? "getfocus" : "losefocus");
 448     },
 449     onFocus: function() {
 450       this.focus = true;
 451       this.send("getfocus");
 452     },
 453     onBlur: function() {
 454       this.focus = false;
 455       this.send("losefocus");
 456     },
 457     partialResetNewchallenge: function() {
 458       // Reset potential target and custom FEN:
 459       this.newchallenge.to = "";
 460       this.newchallenge.fen = "";
 461       this.newchallenge.diag = "";
 462       this.newchallenge.memorize = false;
 463     },
 464     showNewchallengeForm: function() {
 465       this.partialResetNewchallenge();
 466       window.doClick("modalNewgame");
 467     },
 468     addPresetChall: function(chall) {
 469       // Add only if not already existing:
 470       if (this.presetChalls.some(c =>
 471         c.vid == chall.vid &&
 472         c.cadence == chall.cadence &&
 473         c.randomness == chall.randomness
 474       )) {
 475         return;
 476       }
 477       const L = this.presetChalls.length;
 478       this.presetChalls.push({
 479         index: L,
 480         vid: chall.vid,
 481         vname: chall.vname, //redundant, but easier
 482         cadence: chall.cadence,
 483         randomness: chall.randomness
 484       });
 485       localStorage.setItem("presetChalls", JSON.stringify(this.presetChalls));
 486     },
 487     removePresetChall: function(e, pchall) {
 488       e.stopPropagation();
 489       const pchallIdx =
 490         this.presetChalls.findIndex(pc => pc.index == pchall.index);
 491       this.presetChalls.splice(pchallIdx, 1);
 492       localStorage.setItem("presetChalls", JSON.stringify(this.presetChalls));
 493     },
 494     tchallButtonsMargin: function() {
 495       if (!!this.curChallToAccept.fen) return { "margin-top": "10px" };
 496       return {};
 497     },
 498     changeChallTarget: function() {
 499       if (!this.newchallenge.to) {
 500         // Reset potential FEN + diagram
 501         this.newchallenge.fen = "";
 502         this.newchallenge.diag = "";
 503       }
 504     },
 505     cadenceFocusIfOpened: function() {
 506       if (event.target.checked)
 507         document.getElementById("cadence").focus();
 508     },
 509     send: function(code, obj) {
 510       if (!!this.conn && this.conn.readyState == 1) {
 511         this.conn.send(JSON.stringify(Object.assign({ code: code }, obj)));
 512       }
 513     },
 514     getVname: function(vid) {
 515       const variant = this.st.variants.find(v => v.id == vid);
 516       // this.st.variants might be uninitialized (variant == null)
 517       return variant ? variant.name : "";
 518     },
 519     filterChallenges: function(type) {
 520       return this.challenges.filter(c => c.type == type);
 521     },
 522     filterGames: function(type) {
 523       return this.games.filter(g => g.type == type);
 524     },
 525     // o: challenge or game
 526     classifyObject: function(o) {
 527       // Consider imports as live games (TODO)
 528       if (!!o.id && !!o.id.toString().match(/^i/)) return "live";
 529       return o.cadence.indexOf("d") === -1 ? "live" : "corr";
 530     },
 531     setDisplay: function(letter, type, e) {
 532       this[letter + "display"] = type;
 533       localStorage.setItem(
 534         "type-" + (letter == "c" ? "challenges" : "games"),
 535         type
 536       );
 537       let elt = e
 538         ? e.target
 539         : document.getElementById("btn" + letter.toUpperCase() + type);
 540       elt.classList.add("active");
 541       elt.classList.remove("somethingnew"); //in case of
 542       if (!!elt.previousElementSibling)
 543         elt.previousElementSibling.classList.remove("active");
 544       else elt.nextElementSibling.classList.remove("active");
 545     },
 546     isGamer: function(sid) {
 547       return Object.values(this.people[sid].tmpIds)
 548         .some(v => v.focus && v.page.indexOf("/game/") >= 0);
 549     },
 550     isFocusedOnHall: function(sid) {
 551       return (
 552         // This is meant to challenge people, thus the next 2 conditions:
 553         this.st.user.id > 0 &&
 554         sid != this.st.user.sid &&
 555         Object.values(this.people[sid].tmpIds)
 556           .some(v => v.focus && v.page == "/")
 557       );
 558     },
 559     challenge: function(sid) {
 560       this.partialResetNewchallenge();
 561       // Available, in Hall
 562       this.newchallenge.to = this.people[sid].name;
 563       // TODO: also store target sid to not re-search for it
 564       document.getElementById("modalPeople").checked = false;
 565       window.doClick("modalNewgame");
 566     },
 567     watchGame: function(sid) {
 568       // In some game, maybe playing maybe not: show a random one
 569       let gids = [];
 570       Object.values(this.people[sid].tmpIds).forEach(v => {
 571         if (v.focus) {
 572           const matchGid = v.page.match(/[a-zA-Z0-9]+$/);
 573           if (!!matchGid) gids.push(matchGid[0]);
 574         }
 575       });
 576       const gid = gids[Math.floor(Math.random() * gids.length)];
 577       window.open("/#/game/" + gid, "_blank");
 578     },
 579     showGame: function(g) {
 580       // NOTE: we are an observer, since only games I don't play are shown here
 581       // ==> Moves sent by connected remote player(s) if live game
 582       window.open("/#/game/" + g.id, "_blank");
 583     },
 584     toggleSocialColor: function(action) {
 585       if (!action && document.getElementById("modalPeople").checked)
 586         document.getElementById("inputChat").focus();
 587       else
 588         document.getElementById("peopleBtn").classList.remove("somethingnew");
 589     },
 590     processChat: function(chat) {
 591       this.send("newchat", { data: chat });
 592     },
 593     getOppsid: function(c) {
 594       let oppsid = c.from.sid; //may not be defined if corr + offline opp
 595       if (!oppsid) {
 596         oppsid = Object.keys(this.people).find(
 597           sid => this.people[sid].id == c.from.id
 598         );
 599       }
 600       return oppsid;
 601     },
 602     // Messaging center:
 603     socketMessageListener: function(msg) {
 604       if (!this.conn) return;
 605       const data = JSON.parse(msg.data);
 606       switch (data.code) {
 607         case "pollclientsandgamers": {
 608           // TODO: shuffling and random filtering on server,
 609           // if the room is really crowded.
 610           Object.keys(data.sockIds).forEach(sid => {
 611             if (sid != this.st.user.sid) {
 612               // Pick a target tmpId (+page) at random:
 613               const pt = Object.values(data.sockIds[sid]);
 614               const randPage = pt[randInt(pt.length)].page;
 615               this.send(
 616                 "askidentity",
 617                 {
 618                   target: sid,
 619                   page: randPage
 620                 }
 621               );
 622             }
 623             if (!this.people[sid])
 624               // Do not set name or id: identity unknown yet
 625               this.people[sid] = { tmpIds: data.sockIds[sid] };
 626             else
 627               Object.assign(this.people[sid].tmpIds, data.sockIds[sid]);
 628             if (Object.values(data.sockIds[sid]).some(v => v.page == "/"))
 629               // Peer is in Hall
 630               this.send("askchallenges", { target: sid });
 631             Object.values(data.sockIds[sid]).forEach(v => {
 632               if (
 633                 v.page.indexOf("/game/") >= 0 &&
 634                 !v.page.match(/\/[0-9]+$/)
 635               ) {
 636                 // Peer is in Game: ask only if live game
 637                 this.send("askgame", { target: sid, page: v.page });
 638               }
 639             });
 640           });
 641           break;
 642         }
 643         case "connect":
 644         case "gconnect": {
 645           const page = data.page || "/";
 646           if (data.code == "connect") {
 647             // Ask challenges only on first connexion:
 648             if (!this.people[data.from[0]])
 649               this.send("askchallenges", { target: data.from[0] });
 650           }
 651           // Ask game only if live:
 652           else if (!page.match(/\/[0-9]+$/))
 653             this.send("askgame", { target: data.from[0], page: page });
 654           if (!this.people[data.from[0]]) {
 655             this.$set(
 656               this.people,
 657               data.from[0],
 658               {
 659                 tmpIds: {
 660                   [data.from[1]]: { page: page, focus: true }
 661                 }
 662               }
 663             );
 664             // For self multi-connects tests:
 665             this.newConnect[data.from[0]] = true;
 666             this.send("askidentity", { target: data.from[0], page: page });
 667           } else {
 668             this.people[data.from[0]].tmpIds[data.from[1]] =
 669               { page: page, focus: true };
 670             this.$forceUpdate(); //TODO: shouldn't be required
 671           }
 672           break;
 673         }
 674         case "disconnect":
 675         case "gdisconnect": {
 676           // If the user reloads the page twice very quickly
 677           // (experienced with Firefox), the first reload won't have time to
 678           // connect but will trigger a "close" event anyway.
 679           // ==> Next check is required.
 680           if (!this.people[data.from[0]]) return;
 681           delete this.people[data.from[0]].tmpIds[data.from[1]];
 682           if (Object.keys(this.people[data.from[0]].tmpIds).length == 0)
 683             this.$delete(this.people, data.from[0]);
 684           else this.$forceUpdate(); //TODO: shouldn't be required
 685           if (data.code == "disconnect") {
 686             // Remove the live challenges sent by this player, if
 687             // he isn't connected on another tab:
 688             if (
 689               !this.people[data.from[0]] ||
 690               Object.values(this.people[data.from[0]].tmpIds)
 691                 .every(v => v.page != "/")
 692             ) {
 693               ArrayFun.remove(
 694                 this.challenges,
 695                 c => c.type == "live" && c.from.sid == data.from[0],
 696                 "all"
 697               );
 698             }
 699           } else {
 700             // Remove the matching live game if now unreachable
 701             const gid = data.page.match(/[a-zA-Z0-9]+$/)[0];
 702             // Corr games are always reachable:
 703             if (!gid.match(/^[0-9]+$/)) {
 704               // Live games are reachable if someone is on the game page
 705               if (Object.values(this.people).every(p =>
 706                 Object.values(p.tmpIds).every(v => v.page != data.page))
 707               ) {
 708                 ArrayFun.remove(this.games, g => g.id == gid);
 709               }
 710             }
 711           }
 712           break;
 713         }
 714         case "getfocus": {
 715           let player = this.people[data.from[0]];
 716           // If user reload a page, focus may arrive earlier than connect
 717           if (!!player) {
 718             player.tmpIds[data.from[1]].focus = true;
 719             this.$forceUpdate(); //TODO: shouldn't be required
 720           }
 721           break;
 722         }
 723         case "losefocus": {
 724           let player = this.people[data.from[0]];
 725           if (!!player) {
 726             player.tmpIds[data.from[1]].focus = false;
 727             this.$forceUpdate(); //TODO: shouldn't be required
 728           }
 729           break;
 730         }
 731         case "askidentity": {
 732           // Request for identification
 733           const me = {
 734             // Decompose to avoid revealing email
 735             name: this.st.user.name,
 736             sid: this.st.user.sid,
 737             id: this.st.user.id
 738           };
 739           this.send("identity", { data: me, target: data.from });
 740           break;
 741         }
 742         case "identity": {
 743           const user = data.data;
 744           let player = this.people[user.sid];
 745           // player.tmpIds is already set
 746           player.id = user.id;
 747           player.name = user.name;
 748           // TODO: this.$set(people, ...) fails. So forceUpdate.
 749           //       But this shouldn't be like that!
 750           this.$forceUpdate();
 751           // If I multi-connect, kill current connexion if no mark (I'm older)
 752           if (this.newConnect[user.sid]) {
 753             delete this.newConnect[user.sid];
 754             if (
 755               user.id > 0 &&
 756               user.id == this.st.user.id &&
 757               user.sid != this.st.user.sid
 758             ) {
 759               // I logged in elsewhere:
 760               this.cleanBeforeDestroy();
 761               alert(this.st.tr["New connexion detected: tab now offline"]);
 762             }
 763           }
 764           break;
 765         }
 766         case "askchallenges": {
 767           // Send my current live challenges (if any)
 768           const myChallenges = this.challenges
 769             .filter(c =>
 770               c.from.sid == this.st.user.sid && c.type == "live"
 771             )
 772             .map(c => {
 773               // NOTE: in principle, should only send targeted challenge to the
 774               // target. But we may not know yet the identity of the target
 775               // (just name), so can't decide if data.from is the target.
 776               return {
 777                 id: c.id,
 778                 from: this.st.user.sid,
 779                 to: c.to,
 780                 randomness: c.randomness,
 781                 fen: c.fen,
 782                 vid: c.vid,
 783                 cadence: c.cadence,
 784                 added: c.added
 785               };
 786             });
 787           if (myChallenges.length > 0)
 788             this.send("challenges", { data: myChallenges, target: data.from });
 789           break;
 790         }
 791         case "challenges": //after "askchallenges"
 792           data.data.forEach(this.addChallenge);
 793           break;
 794         case "newchallenge":
 795           this.addChallenge(data.data);
 796           break;
 797         case "refusechallenge": {
 798           const cid = data.data;
 799           ArrayFun.remove(this.challenges, c => c.id == cid);
 800           alert(this.st.tr["Challenge declined"]);
 801           break;
 802         }
 803         case "deletechallenge_s": {
 804           // NOTE: the challenge(s) may be already removed
 805           const cref = data.data;
 806           if (!!cref.cid)
 807             ArrayFun.remove(this.challenges, c => c.id == cref.cid);
 808           else if (!!cref.sids) {
 809             cref.sids.forEach(s => {
 810               ArrayFun.remove(
 811                 this.challenges,
 812                 c => c.type == "live" && c.from.sid == s,
 813                 "all"
 814               );
 815             });
 816           }
 817           break;
 818         }
 819         case "game": // Individual request
 820         case "newgame": {
 821           const game = data.data;
 822           // Ignore games where I play (will go in MyGames page),
 823           // and also games that I already received.
 824           if (
 825             this.games.findIndex(g => g.id == game.id) == -1 &&
 826             game.players.every(p => {
 827               return (
 828                 p.sid != this.st.user.sid &&
 829                 (p.id == 0 || p.id != this.st.user.id)
 830               );
 831             })
 832           ) {
 833             let newGame = game;
 834             newGame.type = this.classifyObject(game);
 835             newGame.vname = this.getVname(game.vid);
 836             if (!game.score)
 837               // New game from Hall
 838               newGame.score = "*";
 839             this.games.push(newGame);
 840             if (
 841               newGame.score == '*' &&
 842               (newGame.type == "live" && this.gdisplay == "corr") ||
 843               (newGame.type == "corr" && this.gdisplay == "live")
 844             ) {
 845               document
 846                 .getElementById("btnG" + newGame.type)
 847                 .classList.add("somethingnew");
 848             }
 849           }
 850           break;
 851         }
 852         case "result": {
 853           let g = this.games.find(g => g.id == data.gid);
 854           if (!!g) g.score = data.score;
 855           break;
 856         }
 857         case "startgame": {
 858           // New game just started, I'm involved
 859           const gameInfo = data.data;
 860           if (this.classifyObject(gameInfo) == "live")
 861             this.startNewGame(gameInfo);
 862           else {
 863             this.infoMessage =
 864               this.st.tr["New correspondence game:"] + " " +
 865               "<a href='#/game/" + gameInfo.id + "'>" +
 866               "#/game/" + gameInfo.id + "</a>";
 867             document.getElementById("modalInfo").checked = true;
 868           }
 869           break;
 870         }
 871         case "newchat":
 872           this.$refs["chatcomp"].newChat(data.data);
 873           if (!document.getElementById("modalPeople").checked)
 874             document.getElementById("peopleBtn").classList.add("somethingnew");
 875           break;
 876       }
 877     },
 878     loadMoreCorr: function() {
 879       ajax(
 880         "/observedgames",
 881         "GET",
 882         {
 883           data: {
 884             uid: this.st.user.id,
 885             cursor: this.cursor
 886           },
 887           success: (res) => {
 888             const L = res.games.length;
 889             if (L > 0) {
 890               if (
 891                 this.cursor == Number.MAX_SAFE_INTEGER &&
 892                 this.games.length == 0 &&
 893                 this.gdisplay == "live" &&
 894                 res.games.some(g => g.score == '*')
 895               ) {
 896                 // First loading: show indicators
 897                 document
 898                   .getElementById("btnGcorr")
 899                   .classList.add("somethingnew");
 900               }
 901               this.cursor = res.games[L - 1].created;
 902               let moreGames = res.games.map(g => {
 903                 const vname = this.getVname(g.vid);
 904                 return Object.assign(
 905                   {},
 906                   g,
 907                   {
 908                     type: "corr",
 909                     vname: vname
 910                   }
 911                 );
 912               });
 913               this.games = this.games.concat(moreGames);
 914             } else this.hasMore = false;
 915           }
 916         }
 917       );
 918     },
 919     // Challenge lifecycle:
 920     addChallenge: function(chall) {
 921       // NOTE about next condition: see "askchallenges" case.
 922       if (
 923         !chall.to ||
 924         (this.people[chall.from].id > 0 &&
 925           (chall.from == this.st.user.sid || chall.to == this.st.user.name))
 926       ) {
 927         let newChall = Object.assign({}, chall);
 928         newChall.type = this.classifyObject(chall);
 929         newChall.randomness = chall.randomness;
 930         newChall.added = Date.now();
 931         let fromValues = Object.assign({}, this.people[chall.from]);
 932         delete fromValues["pages"]; //irrelevant in this context
 933         newChall.from = Object.assign({ sid: chall.from }, fromValues);
 934         newChall.vname = this.getVname(newChall.vid);
 935         this.challenges.push(newChall);
 936         if (
 937           (newChall.type == "live" && this.cdisplay == "corr") ||
 938           (newChall.type == "corr" && this.cdisplay == "live")
 939         ) {
 940           document
 941             .getElementById("btnC" + newChall.type)
 942             .classList.add("somethingnew");
 943         }
 944         if (!!chall.to) {
 945           notify(
 946             "New challenge",
 947             // fromValues.name should exist since the player is online, but
 948             // let's consider there is some chance that the challenge arrives
 949             // right after we connected and before receiving the poll result:
 950             { body: "from " + (fromValues.name || "unknown yet...") }
 951           );
 952         }
 953       }
 954     },
 955     loadNewchallVariant: async function(cb) {
 956       const vname = this.getVname(this.newchallenge.vid);
 957       await import("@/variants/" + vname + ".js")
 958       .then((vModule) => {
 959         window.V = vModule[vname + "Rules"];
 960         this.newchallenge.V = window.V;
 961         this.newchallenge.vname = vname;
 962         if (!!cb) cb();
 963       });
 964     },
 965     trySetNewchallDiag: function() {
 966       if (!this.newchallenge.fen) {
 967         this.newchallenge.diag = "";
 968         return;
 969       }
 970       // If vid > 0 then the variant is loaded (function above):
 971       window.V = this.newchallenge.V;
 972       if (
 973         this.newchallenge.vid > 0 &&
 974         !!this.newchallenge.fen &&
 975         V.IsGoodFen(this.newchallenge.fen)
 976       ) {
 977         const parsedFen = V.ParseFen(this.newchallenge.fen);
 978         this.newchallenge.diag = getDiagram({
 979           position: parsedFen.position,
 980           orientation: parsedFen.turn
 981         });
 982       } else this.newchallenge.diag = "";
 983     },
 984     newChallFromPreset(pchall) {
 985       this.partialResetNewchallenge();
 986       this.newchallenge.vid = pchall.vid;
 987       this.newchallenge.cadence = pchall.cadence;
 988       this.newchallenge.randomness = pchall.randomness;
 989       this.loadNewchallVariant(this.issueNewChallenge);
 990     },
 991     issueNewChallenge: async function() {
 992       if (!!(this.newchallenge.cadence.match(/^[0-9]+$/)))
 993         this.newchallenge.cadence += "+0"; //assume minutes, no increment
 994       const ctype = this.classifyObject(this.newchallenge);
 995       // TODO: cadence still unchecked so ctype could be wrong...
 996       let error = "";
 997       if (!this.newchallenge.vid)
 998         error = this.st.tr["Please select a variant"];
 999       else if (ctype == "corr" && this.st.user.id <= 0)
1000         error = this.st.tr["Please log in to play correspondence games"];
1001       else if (!!this.newchallenge.to) {
1002         if (this.newchallenge.to == this.st.user.name)
1003           error = this.st.tr["Self-challenge is forbidden"];
1004         else if (
1005           ctype == "live" &&
1006           Object.values(this.people).every(p => p.name != this.newchallenge.to)
1007         ) {
1008           error = this.newchallenge.to + " " + this.st.tr["is not online"];
1009         }
1010       }
1011       if (error) {
1012         alert(error);
1013         return;
1014       }
1015       window.V = this.newchallenge.V;
1016       error = checkChallenge(this.newchallenge);
1017       if (error) {
1018         alert(error);
1019         return;
1020       }
1021       // NOTE: "from" information is not required here
1022       let chall = Object.assign({}, this.newchallenge);
1023       // Add only if not already issued (not counting target or FEN):
1024       if (this.challenges.some(c =>
1025         (
1026           c.from.sid == this.st.user.sid ||
1027           (c.from.id > 0 && c.from.id == this.st.user.id)
1028         )
1029         &&
1030         c.vid == chall.vid &&
1031         c.cadence == chall.cadence &&
1032         c.randomness == chall.randomness
1033       )) {
1034         alert(this.st.tr["Challenge already exists"]);
1035         return;
1036       }
1037       if (this.newchallenge.memorize) this.addPresetChall(this.newchallenge);
1038       delete chall["V"];
1039       delete chall["diag"];
1040       const finishAddChallenge = cid => {
1041         chall.id = cid || "c" + getRandString();
1042         const MAX_ALLOWED_CHALLS = 3;
1043         // Remove oldest challenge if 3 found: only 3 at a time of a given type
1044         let countMyChalls = 0;
1045         let challToDelIdx = 0;
1046         let oldestAdded = Number.MAX_SAFE_INTEGER;
1047         for (let i=0; i<this.challenges.length; i++) {
1048           const c = this.challenges[i];
1049           if (
1050             c.type == ctype &&
1051             (
1052               c.from.sid == this.st.user.sid ||
1053               (c.from.id > 0 && c.from.id == this.st.user.id)
1054             )
1055           ) {
1056             countMyChalls++;
1057             if (c.added < oldestAdded) {
1058               challToDelIdx = i;
1059               oldestAdded = c.added;
1060             }
1061           }
1062         }
1063         if (countMyChalls >= MAX_ALLOWED_CHALLS) {
1064           this.send(
1065             "deletechallenge_s",
1066             { data: { cid: this.challenges[challToDelIdx].id } }
1067           );
1068           if (ctype == "corr") {
1069             ajax(
1070               "/challenges",
1071               "DELETE",
1072               { data: { id: this.challenges[challToDelIdx].id } }
1073             );
1074           }
1075           this.challenges.splice(challToDelIdx, 1);
1076         }
1077         this.send("newchallenge", {
1078           data: Object.assign({ from: this.st.user.sid }, chall)
1079         });
1080         // Add new challenge:
1081         chall.from = {
1082           sid: this.st.user.sid,
1083           id: this.st.user.id,
1084           name: this.st.user.name
1085         };
1086         chall.added = Date.now();
1087         // NOTE: vname and type are redundant (deduced from cadence + vid)
1088         chall.type = ctype;
1089         chall.vname = this.newchallenge.vname;
1090         this.challenges.push(chall);
1091         // Remember cadence  + vid for quicker further challenges:
1092         localStorage.setItem("cadence", chall.cadence);
1093         localStorage.setItem("vid", chall.vid);
1094         localStorage.setItem("challRandomness", chall.randomness);
1095         document.getElementById("modalNewgame").checked = false;
1096         // Show the challenge if not on current display
1097         if (
1098           (ctype == "live" && this.cdisplay == "corr") ||
1099           (ctype == "corr" && this.cdisplay == "live")
1100         ) {
1101           this.setDisplay('c', ctype);
1102         }
1103       };
1104       if (ctype == "live") {
1105         // Live challenges have a random ID
1106         finishAddChallenge(null);
1107       } else {
1108         // Correspondence game: send challenge to server
1109         ajax(
1110           "/challenges",
1111           "POST",
1112           {
1113             data: { chall: chall },
1114             success: (response) => {
1115               finishAddChallenge(response.id);
1116             }
1117           }
1118         );
1119       }
1120     },
1121     // Callback function after a diagram was showed to accept
1122     // or refuse targetted challenge:
1123     decisionChallenge: function(accepted) {
1124       this.curChallToAccept.accepted = accepted;
1125       this.finishProcessingChallenge(this.curChallToAccept);
1126       document.getElementById("modalAccept").checked = false;
1127     },
1128     finishProcessingChallenge: function(c) {
1129       if (c.accepted) {
1130         c.seat = {
1131           sid: this.st.user.sid,
1132           id: this.st.user.id,
1133           name: this.st.user.name
1134         };
1135         this.launchGame(c);
1136         if (c.type == "live") {
1137           // Remove all live challenges of both players
1138           this.send(
1139             "deletechallenge_s",
1140             { data: { sids: [c.from.sid, c.seat.sid] } }
1141           );
1142         }
1143         else
1144           // Corr challenge: just remove the challenge
1145           this.send("deletechallenge_s", { data: { cid: c.id } });
1146       } else {
1147         const oppsid = this.getOppsid(c);
1148         if (!!oppsid)
1149           this.send("refusechallenge", { data: c.id, target: oppsid });
1150         if (c.type == "corr") {
1151           ajax(
1152             "/challenges",
1153             "DELETE",
1154             { data: { id: c.id } }
1155           );
1156         }
1157         this.send("deletechallenge_s", { data: { cid: c.id } });
1158       }
1159     },
1160     // TODO: if several players click same challenge at the same time: problem
1161     clickChallenge: async function(c) {
1162       const myChallenge =
1163         c.from.sid == this.st.user.sid || //live
1164         (this.st.user.id > 0 && c.from.id == this.st.user.id); //corr
1165       if (!myChallenge) {
1166         if (c.type == "corr" && this.st.user.id <= 0) {
1167           alert(this.st.tr["Please log in to accept corr challenges"]);
1168           return;
1169         }
1170         c.accepted = true;
1171         await import("@/variants/" + c.vname + ".js")
1172         .then((vModule) => {
1173           window.V = vModule[c.vname + "Rules"];
1174           if (!!c.to) {
1175             // c.to == this.st.user.name (connected)
1176             if (!!c.fen) {
1177               const parsedFen = V.ParseFen(c.fen);
1178               c.mycolor = V.GetOppCol(parsedFen.turn);
1179               this.tchallDiag = getDiagram({
1180                 position: parsedFen.position,
1181                 orientation: c.mycolor
1182               });
1183             }
1184             this.curChallToAccept = c;
1185             document.getElementById("modalAccept").checked = true;
1186           }
1187           else this.finishProcessingChallenge(c);
1188         });
1189       }
1190       else {
1191         // My challenge
1192         if (c.type == "corr") {
1193           ajax(
1194             "/challenges",
1195             "DELETE",
1196             { data: { id: c.id } }
1197           );
1198         }
1199         this.send("deletechallenge_s", { data: { cid: c.id } });
1200       }
1201       // In all cases, the challenge is consumed:
1202       ArrayFun.remove(this.challenges, ch => ch.id == c.id);
1203     },
1204     // NOTE: when launching game, the challenge is already being deleted
1205     launchGame: function(c) {
1206       // White player index 0, black player index 1:
1207       let players =
1208         !!c.mycolor
1209           ? (c.mycolor == "w" ? [c.seat, c.from] : [c.from, c.seat])
1210           : shuffle([c.from, c.seat]);
1211       players.forEach(p => {
1212         if (!!p["tmpIds"]) delete p["tmpIds"];
1213       });
1214       // These game informations will be shared
1215       let gameInfo = {
1216         id: getRandString(),
1217         fen: c.fen || V.GenRandInitFen(c.randomness),
1218         randomness: c.randomness, //for rematch
1219         players: players,
1220         vid: c.vid,
1221         cadence: c.cadence
1222       };
1223       const notifyNewgame = () => {
1224         const oppsid = this.getOppsid(c);
1225         if (!!oppsid)
1226           // Opponent is online
1227           this.send("startgame", { data: gameInfo, target: oppsid });
1228         // If new corr game, notify Hall (except opponent and me)
1229         if (c.type == "corr") {
1230           this.send(
1231             "newgame",
1232             {
1233               data: gameInfo,
1234               excluded: [this.st.user.sid, oppsid]
1235             }
1236           );
1237         }
1238         // Notify MyGames page:
1239         this.send(
1240           "notifynewgame",
1241           {
1242             data: gameInfo,
1243             targets: gameInfo.players
1244           }
1245         );
1246         // NOTE: no need to send the game to the room, since I'll connect
1247         // on game just after, the main Hall will be notified.
1248       };
1249       if (c.type == "live") {
1250         notifyNewgame();
1251         this.startNewGame(gameInfo);
1252       } else {
1253         // corr: game only on server
1254         ajax(
1255           "/games",
1256           "POST",
1257           {
1258             // cid is useful to delete the challenge:
1259             data: {
1260               gameInfo: gameInfo,
1261               cid: c.id
1262             },
1263             success: (response) => {
1264               gameInfo.id = response.id;
1265               notifyNewgame();
1266               this.$router.push("/game/" + response.id);
1267             }
1268           }
1269         );
1270       }
1271     },
1272     // NOTE: for live games only (corr games start on the server)
1273     startNewGame: function(gameInfo) {
1274       const game = Object.assign(
1275         {},
1276         gameInfo,
1277         {
1278           // (other) Game infos: constant
1279           fenStart: gameInfo.fen,
1280           vname: this.getVname(gameInfo.vid),
1281           created: Date.now(),
1282           // Game state (including FEN): will be updated
1283           moves: [],
1284           clocks: [-1, -1], //-1 = unstarted
1285           chats: [],
1286           score: "*"
1287         }
1288       );
1289       setTimeout(
1290         () => {
1291           const myIdx = (game.players[0].sid == this.st.user.sid ? 0 : 1);
1292           GameStorage.add(game, (err) => {
1293             // If an error occurred, game is not added: the focused tab
1294             // already added the game.
1295             if (!this.focus) {
1296               if (this.st.settings.sound)
1297                 // This will be played several times if several hidden tabs
1298                 // on Hall... TODO: fix that (how ?!)
1299                 new Audio("/sounds/newgame.flac").play().catch(() => {});
1300               notify(
1301                 "New live game",
1302                 { body: "vs " + game.players[1-myIdx].name || "@nonymous" }
1303               );
1304             }
1305             this.$router.push("/game/" + gameInfo.id);
1306           });
1307         },
1308         this.focus ? 0 : 500 + 1000 * Math.random()
1309       );
1310     }
1311   }
1312 };
1313 </script>
1314
1315 <style lang="sass" scoped>
1316 .active
1317   color: #388e3c
1318
1319 #infoDiv > .card
1320   padding: 15px 0
1321   max-width: 430px
1322
1323 #newgameDiv > .card, #acceptDiv > .card
1324   max-width: 767px
1325   max-height: 100%
1326
1327 div#peopleWrap > .card
1328   max-height: 100%
1329
1330 @media screen and (min-width: 1281px)
1331   div#peopleWrap > .card
1332     max-width: 66.67%
1333
1334 @media screen and (max-width: 1280px)
1335   div#peopleWrap > .card
1336     max-width: 83.33%
1337
1338 @media screen and (max-width: 767px)
1339   div#peopleWrap > .card
1340     max-width: 100%
1341
1342 #players
1343   width: 50%
1344   position: relative
1345   float: left
1346
1347 #chat
1348   width: 50%
1349   float: left
1350   position: relative
1351
1352 @media screen and (max-width: 767px)
1353   #players, #chats
1354     width: 100%
1355
1356 #chat > .card
1357   max-width: 100%
1358   margin: 0;
1359   border: none;
1360
1361 #players > p
1362   margin-left: 5px
1363
1364 .anonymous
1365   font-style: italic
1366
1367 button.player-action
1368   margin-left: 32px
1369
1370 .somethingnew
1371   background-color: #90C4EC !important
1372
1373 .tabbtn
1374   background-color: #f9faee
1375
1376 button.acceptBtn
1377   background-color: lightgreen
1378 button.refuseBtn
1379   background-color: red
1380
1381 #buttonsTchall
1382   // margin-top set dynamically (depends if diagram showed or not)
1383   & > button > span
1384     width: 100%
1385     text-align: center
1386
1387 .variantName
1388   font-weight: bold
1389
1390 .diagram
1391   margin: 0 auto
1392   max-width: 400px
1393   // width: 100% required for Firefox
1394   width: 100%
1395
1396 #inputFen
1397   width: 100%
1398
1399 #div2, #div3
1400   margin-top: 15px
1401 @media screen and (max-width: 767px)
1402   #div2, #div3
1403     margin-top: 0
1404
1405 .user-bio
1406   display: inline
1407
1408 tr > td
1409   &.random-0
1410     background-color: #FF5733
1411   &.random-1
1412     background-color: #2B63B4
1413   &.random-2
1414     background-color: #33B42B
1415
1416 @media screen and (max-width: 767px)
1417   h4
1418     margin: 5px 0
1419
1420 button#loadMoreBtn
1421   display: block
1422   margin: 0 auto
1423
1424 td.remove-preset
1425   background-color: lightgrey
1426   text-align: center
1427   & > img
1428     height: 1em
1429 </style>