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[xogo.git] / app.js
1 let $ = document; //shortcut
2
3 ///////////////////
4 // Initialisations
5
6 // https://stackoverflow.com/a/27747377/12660887
7 function generateId (len) {
8 const dec2hex = (dec) => dec.toString(16).padStart(2, "0");
9 let arr = new Uint8Array(len / 2); //len/2 because 2 chars per hex value
10 window.crypto.getRandomValues(arr); //fill with random integers
11 return Array.from(arr, dec2hex).join('');
12 }
13
14 // Populate variants dropdown list
15 let dropdown = $.getElementById("selectVariant");
16 dropdown[0] = new Option("? ? ?", "_random", true, true);
17 dropdown[0].title = "Random variant";
18 for (let i = 0; i < variants.length; i++) {
19 let newOption = new Option(
20 variants[i].disp || variants[i].name, variants[i].name, false, false);
21 newOption.title = variants[i].desc;
22 dropdown[dropdown.length] = newOption;
23 }
24
25 // Ensure that I have a socket ID and a name
26 if (!localStorage.getItem("sid"))
27 localStorage.setItem("sid", generateId(8));
28 if (!localStorage.getItem("name"))
29 localStorage.setItem("name", "@non" + generateId(4));
30 const sid = localStorage.getItem("sid");
31 $.getElementById("myName").value = localStorage.getItem("name");
32
33 // "Material" input field name
34 let inputName = document.getElementById("myName");
35 let formField = document.getElementById("ng-name");
36 const setActive = (active) => {
37 if (active)
38 formField.classList.add("form-field--is-active");
39 else {
40 formField.classList.remove("form-field--is-active");
41 inputName.value == ''
42 ? formField.classList.remove("form-field--is-filled")
43 : formField.classList.add("form-field--is-filled");
44 }
45 };
46 setActive(true);
47 inputName.onblur = () => setActive(false);
48 inputName.onfocus = () => setActive(true);
49
50 /////////
51 // Utils
52
53 function setName() {
54 // 'onChange' event on name input text field [HTML]
55 localStorage.setItem("name", $.getElementById("myName").value);
56 }
57
58 // Turn a "tab" on, and "close" all others
59 function toggleVisible(element) {
60 for (elt of document.querySelectorAll("main > div")) {
61 if (elt.id != element)
62 elt.style.display = "none";
63 else
64 elt.style.display = "block";
65 }
66 if (element == "boardContainer") {
67 // Avoid smartphone scrolling effects (TODO?)
68 document.querySelector("html").style.overflow = "hidden";
69 document.body.style.overflow = "hidden";
70 }
71 else {
72 document.querySelector("html").style.overflow = "visible";
73 document.body.style.overflow = "visible";
74 // Workaround "superposed texts" effect:
75 if (element == "newGame")
76 setActive(false);
77 }
78 }
79
80 let seek_vname;
81 function seekGame() {
82 seek_vname = $.getElementById("selectVariant").value;
83 if (send("seekgame",
84 {vname: seek_vname, name: localStorage.getItem("name")})
85 ) {
86 toggleVisible("pendingSeek");
87 }
88 }
89 function cancelSeek() {
90 if (send("cancelseek", {vname: seek_vname}))
91 toggleVisible("newGame");
92 }
93
94 function sendRematch(random) {
95 if (send("rematch", {gid: gid, random: !!random}))
96 toggleVisible("pendingRematch");
97 }
98 function cancelRematch() {
99 if (send("norematch", {gid: gid}))
100 toggleVisible("newGame");
101 }
102
103 // Play with a friend (or not ^^)
104 function showNewGameForm() {
105 const vname = $.getElementById("selectVariant").value;
106 if (vname == "_random")
107 alert("Select a variant first");
108 else {
109 $.getElementById("gameLink").innerHTML = "";
110 $.getElementById("selectColor").selectedIndex = 0;
111 toggleVisible("newGameForm");
112 import(`/variants/${vname}/class.js`).then(module => {
113 window.V = module.default;
114 for (const [k, v] of Object.entries(V.Aliases))
115 window[k] = v;
116 prepareOptions();
117 });
118 }
119 }
120 function backToNormalSeek() {
121 toggleVisible("newGame");
122 }
123
124 function toggleStyle(event, obj) {
125 const word = obj.innerHTML;
126 options[word] = !options[word];
127 event.target.classList.toggle("highlight-word");
128 }
129
130 let options;
131 function prepareOptions() {
132 options = {};
133 let optHtml = V.Options.select.map(select => { return `
134 <div class="option-select">
135 <label for="var_${select.variable}">${select.label}</label>
136 <div class="select">
137 <select id="var_${select.variable}" data-numeric="1">` +
138 select.options.map(option => { return `
139 <option
140 value="${option.value}"
141 ${option.value == select.defaut ? " selected" : ""}
142 >
143 ${option.label}
144 </option>`;
145 }).join("") + `
146 </select>
147 <span class="focus"></span>
148 </div>
149 </div>`;
150 }).join("");
151 optHtml += V.Options.check.map(check => {
152 return `
153 <div class="option-check">
154 <label class="checkbox">
155 <input id="var_${check.variable}"
156 type="checkbox"${check.defaut ? " checked" : ""}/>
157 <span class="spacer"></span>
158 <span>${check.label}</span>
159 </label>
160 </div>`;
161 }).join("");
162 if (V.Options.styles.length >= 1) {
163 optHtml += '<div class="words">';
164 let i = 0;
165 const stylesLength = V.Options.styles.length;
166 while (i < stylesLength) {
167 optHtml += '<div class="row">';
168 for (let j=i; j<i+4; j++) {
169 if (j == stylesLength)
170 break;
171 const style = V.Options.styles[j];
172 optHtml += `<span onClick="toggleStyle(event, this)">${style}</span>`;
173 }
174 optHtml += "</div>";
175 i += 4;
176 }
177 optHtml += "</div>";
178 }
179 $.getElementById("gameOptions").innerHTML = optHtml;
180 }
181
182 function getGameLink() {
183 const vname = $.getElementById("selectVariant").value;
184 const color = $.getElementById("selectColor").value;
185 for (const select of $.querySelectorAll("#gameOptions select")) {
186 let value = select.value;
187 if (select.attributes["data-numeric"])
188 value = parseInt(value, 10);
189 if (value)
190 options[ select.id.split("_")[1] ] = value;
191 }
192 for (const check of $.querySelectorAll("#gameOptions input")) {
193 if (check.checked)
194 options[ check.id.split("_")[1] ] = check.checked;
195 }
196 send("creategame", {
197 vname: vname,
198 player: {sid: sid, name: localStorage.getItem("name"), color: color},
199 options: options
200 });
201 }
202
203 function fillGameInfos(gameInfos, oppIndex) {
204 fetch(`/variants/${gameInfos.vname}/rules.html`)
205 .then(res => res.text())
206 .then(txt => {
207 let htmlContent = `
208 <div class="players-info">
209 <p>
210 <span class="bold">${gameInfos.vdisp}</span>
211 <span>vs. ${gameInfos.players[oppIndex].name}</span>
212 </p>
213 </div>`;
214 const options = Object.entries(gameInfos.options);
215 if (options.length > 0) {
216 htmlContent += '<div class="options-info">';
217 let i = 0;
218 while (i < options.length) {
219 htmlContent += '<div class="row">';
220 for (let j=i; j<i+4; j++) {
221 if (j == options.length)
222 break;
223 const opt = options[j];
224 if (!opt[1])
225 continue;
226 htmlContent +=
227 '<span class="option">' +
228 (opt[1] === true ? opt[0] : `${opt[0]}:${opt[1]}`) + " " +
229 "</span>";
230 }
231 htmlContent += "</div>";
232 i += 4;
233 }
234 htmlContent += "</div>";
235 }
236 htmlContent += `
237 <div class="rules">${txt}</div>
238 <div class="btn-wrap">
239 <button onClick="toggleGameInfos()">Back to game</button>
240 </div>`;
241 $.getElementById("gameInfos").innerHTML = htmlContent;
242 });
243 }
244
245 ////////////////
246 // Communication
247
248 let socket, gid, recoAttempt = 0;
249 const autoReconnectDelay = () => {
250 return [100, 200, 500, 1000, 3000, 10000, 30000][Math.min(recoAttempt, 6)];
251 };
252
253 function send(code, data, opts) {
254 opts = opts || {};
255 const trySend = () => {
256 if (socket.readyState == 1) {
257 socket.send(JSON.stringify(Object.assign({code: code}, data)));
258 if (opts.success)
259 opts.success();
260 return true;
261 }
262 return false;
263 };
264 const firstTry = trySend();
265 if (!firstTry) {
266 if (opts.retry) {
267 // Retry for a few seconds (sending move)
268 let sendAttempt = 1;
269 const retryLoop = setInterval(
270 () => {
271 if (trySend() || ++sendAttempt >= 3)
272 clearInterval(retryLoop);
273 if (sendAttempt >= 3 && opts.error)
274 opts.error();
275 },
276 1000
277 );
278 }
279 else if (opts.error)
280 opts.error();
281 }
282 return firstTry;
283 }
284
285 function copyClipboard(msg) {
286 navigator.clipboard.writeText(msg);
287 }
288 function getWhatsApp(msg) {
289 return `https://api.whatsapp.com/send?text=${encodeURIComponent(msg)}`;
290 }
291
292 const tryResumeGame = () => {
293 recoAttempt = 0;
294 // If a game is found, resume it:
295 if (localStorage.getItem("gid")) {
296 gid = localStorage.getItem("gid");
297 send("getgame",
298 {gid: gid},
299 {
300 retry: true,
301 error: () => alert("Cannot load game: no connection")
302 });
303 }
304 else {
305 // If URL indicates "play with a friend", start game:
306 const hashIdx = document.URL.indexOf('#');
307 if (hashIdx >= 0) {
308 const urlParts = $.URL.split('#');
309 gid = urlParts[1];
310 localStorage.setItem("gid", gid);
311 history.replaceState(null, '', urlParts[0]); //hide game ID
312 send("joingame",
313 {gid: gid, name: localStorage.getItem("name")},
314 {
315 retry: true,
316 error: () => alert("Cannot load game: no connection")
317 });
318 }
319 }
320 };
321
322 const messageCenter = (msg) => {
323 const obj = JSON.parse(msg.data);
324 switch (obj.code) {
325 // Start new game:
326 case "gamestart": {
327 if (document.hidden)
328 notifyMe("game");
329 gid = obj.gid;
330 initializeGame(obj);
331 break;
332 }
333 // Game vs. friend just created on server: share link now
334 case "gamecreated": {
335 const link = `${Params.http_server}/#${obj.gid}`;
336 $.getElementById("gameLink").innerHTML = `
337 <p>
338 <a href="${getWhatsApp(link)}">WhatsApp</a>
339 /
340 <span onClick="copyClipboard('${link}')">ToClipboard</span>
341 </p>
342 <p>${link}</p>
343 `;
344 break;
345 }
346 // Game vs. friend joined after 1 minute (try again!)
347 case "jointoolate":
348 alert("Game no longer available");
349 break;
350 // Get infos of a running game (already launched)
351 case "gameinfo":
352 initializeGame(obj);
353 break;
354 // Tried to resume a game which is now gone:
355 case "nogame":
356 localStorage.removeItem("gid");
357 break;
358 // Receive opponent's move:
359 case "newmove":
360 // Basic check: was it really opponent's turn?
361 if (vr.turn == playerColor)
362 break;
363 if (document.hidden)
364 notifyMe("move");
365 vr.playReceivedMove(obj.moves, () => {
366 if (vr.getCurrentScore(obj.moves[obj.moves.length-1]) != "*") {
367 localStorage.removeItem("gid");
368 setTimeout( () => toggleVisible("gameStopped"), 2000 );
369 }
370 else
371 toggleTurnIndicator(true);
372 });
373 break;
374 // Opponent stopped game (draw, abort, resign...)
375 case "gameover":
376 toggleVisible("gameStopped");
377 localStorage.removeItem("gid");
378 break;
379 // Opponent cancelled rematch:
380 case "closerematch":
381 toggleVisible("newGame");
382 break;
383 }
384 };
385
386 const handleError = (err) => {
387 if (err.code === "ECONNREFUSED") {
388 removeAllListeners();
389 alert("Server refused connection. Please reload page later");
390 }
391 socket.close();
392 };
393
394 const handleClose = () => {
395 setTimeout(() => {
396 removeAllListeners();
397 connectToWSS();
398 }, autoReconnectDelay());
399 };
400
401 function removeAllListeners() {
402 socket.removeEventListener("open", tryResumeGame);
403 socket.removeEventListener("message", messageCenter);
404 socket.removeEventListener("error", handleError);
405 socket.removeEventListener("close", handleClose);
406 }
407
408 function connectToWSS() {
409 socket =
410 new WebSocket(`${Params.socket_server}${Params.socket_path}?sid=${sid}`);
411 socket.addEventListener("open", tryResumeGame);
412 socket.addEventListener("message", messageCenter);
413 socket.addEventListener("error", handleError);
414 socket.addEventListener("close", handleClose);
415 recoAttempt++;
416 }
417 connectToWSS();
418
419 ///////////
420 // Playing
421
422 function toggleTurnIndicator(myTurn) {
423 let indicator =
424 $.getElementById("boardContainer").querySelector(".chessboard");
425 if (myTurn)
426 indicator.style.outline = "thick solid green";
427 else
428 indicator.style.outline = "thick solid lightgrey";
429 }
430
431 function notifyMe(code) {
432 const doNotify = () => {
433 // NOTE: empty body (TODO?)
434 new Notification("New " + code, { vibrate: [200, 100, 200] });
435 new Audio("/assets/new_" + code + ".mp3").play();
436 }
437 if (Notification.permission === "granted")
438 doNotify();
439 else if (Notification.permission !== "denied") {
440 Notification.requestPermission().then(permission => {
441 if (permission === "granted")
442 doNotify();
443 });
444 }
445 }
446
447 let curMoves = [],
448 lastFen;
449 const afterPlay = (move) => {
450 const callbackAfterSend = () => {
451 curMoves = [];
452 const result = vr.getCurrentScore(move);
453 if (result != "*") {
454 setTimeout(() => {
455 toggleVisible("gameStopped");
456 send("gameover", {gid: gid});
457 }, 2000);
458 }
459 };
460 // Pack into one moves array, then send
461 curMoves.push(move);
462 if (vr.turn != playerColor) {
463 toggleTurnIndicator(false);
464 send("newmove",
465 {gid: gid, moves: curMoves, fen: vr.getFen()},
466 {
467 retry: true,
468 success: callbackAfterSend,
469 error: () => alert("Move not sent: reload page")
470 });
471 }
472 };
473
474 let vr, playerColor;
475 function initializeGame(obj) {
476 const options = obj.options || {};
477 import(`/variants/${obj.vname}/class.js`).then(module => {
478 window.V = module.default;
479 for (const [k, v] of Object.entries(V.Aliases))
480 window[k] = v;
481 // Load CSS. Avoid loading twice the same stylesheet:
482 const allIds = [].slice.call($.styleSheets).map(s => s.id);
483 const newId = obj.vname + "_css";
484 if (!allIds.includes(newId)) {
485 $.getElementsByTagName("head")[0].insertAdjacentHTML(
486 "beforeend",
487 `<link id="${newId}" rel="stylesheet"
488 href="/variants/${obj.vname}/style.css"/>`);
489 }
490 playerColor = (sid == obj.players[0].sid ? "w" : "b");
491 // Init + remove potential extra DOM elements from a previous game:
492 document.getElementById("boardContainer").innerHTML = `
493 <div id="upLeftInfos"
494 onClick="toggleGameInfos()">
495 <svg version="1.1"
496 viewBox="0.5 0.5 100 100">
497 <g>
498 <path d="M50.5,0.5c-27.614,0-50,22.386-50,50c0,27.614,22.386,50,50,50s50-22.386,50-50C100.5,22.886,78.114,0.5,50.5,0.5z M60.5,85.5h-20v-40h20V85.5z M50.5,35.5c-5.523,0-10-4.477-10-10s4.477-10,10-10c5.522,0,10,4.477,10,10S56.022,35.5,50.5,35.5z"/>
499 </g>
500 </svg>
501 </div>
502 <div id="upRightStop"
503 onClick="confirmStopGame()">
504 <svg version="1.1"
505 viewBox="0 0 533.333 533.333">
506 <g>
507 <path d="M528.468,428.468c-0.002-0.002-0.004-0.004-0.006-0.005L366.667,266.666l161.795-161.797 c0.002-0.002,0.004-0.003,0.006-0.005c1.741-1.742,3.001-3.778,3.809-5.946c2.211-5.925,0.95-12.855-3.814-17.62l-76.431-76.43 c-4.765-4.763-11.694-6.024-17.619-3.812c-2.167,0.807-4.203,2.066-5.946,3.807c0,0.002-0.002,0.003-0.005,0.005L266.667,166.666 L104.87,4.869c-0.002-0.002-0.003-0.003-0.005-0.005c-1.743-1.74-3.778-3-5.945-3.807C92.993-1.156,86.065,0.105,81.3,4.869 L4.869,81.3c-4.764,4.765-6.024,11.694-3.813,17.619c0.808,2.167,2.067,4.205,3.808,5.946c0.002,0.001,0.003,0.003,0.005,0.005 l161.797,161.796L4.869,428.464c-0.001,0.002-0.003,0.003-0.004,0.005c-1.741,1.742-3,3.778-3.809,5.945 c-2.212,5.924-0.951,12.854,3.813,17.619L81.3,528.464c4.766,4.765,11.694,6.025,17.62,3.813c2.167-0.809,4.203-2.068,5.946-3.809 c0.001-0.002,0.003-0.003,0.005-0.005l161.796-161.797l161.795,161.797c0.003,0.001,0.005,0.003,0.007,0.004 c1.743,1.741,3.778,3.001,5.944,3.81c5.927,2.212,12.856,0.951,17.619-3.813l76.43-76.432c4.766-4.765,6.026-11.696,3.815-17.62 C531.469,432.246,530.209,430.21,528.468,428.468z"/>
508 </g>
509 </svg>
510 </div>
511 <div class="resizeable chessboard"></div>`;
512 vr = new V({
513 seed: obj.seed, //may be null if FEN already exists (running game)
514 fen: obj.fen,
515 element: "boardContainer",
516 color: playerColor,
517 afterPlay: afterPlay,
518 options: options
519 });
520 if (!obj.fen) {
521 // Game creation: both players set FEN, in case of one is offline
522 send("setfen", {gid: obj.gid, fen: vr.getFen()});
523 localStorage.setItem("gid", obj.gid);
524 }
525 const select = $.getElementById("selectVariant");
526 obj.vdisp = "";
527 for (let i=0; i<select.options.length; i++) {
528 if (select.options[i].value == obj.vname) {
529 obj.vdisp = select.options[i].text;
530 break;
531 }
532 }
533 fillGameInfos(obj, playerColor == "w" ? 1 : 0);
534 if (obj.randvar)
535 toggleVisible("gameInfos");
536 else
537 toggleVisible("boardContainer");
538 toggleTurnIndicator(vr.turn == playerColor);
539 });
540 }
541
542 function confirmStopGame() {
543 if (confirm("Stop game?") && send("gameover", {gid: gid, relay: true})) {
544 localStorage.removeItem("gid");
545 toggleVisible("gameStopped");
546 }
547 }
548
549 function toggleGameInfos() {
550 if ($.getElementById("gameInfos").style.display == "none")
551 toggleVisible("gameInfos");
552 else
553 toggleVisible("boardContainer");
554 }
555
556 $.body.addEventListener("keydown", (e) => {
557 if (!localStorage.getItem("gid"))
558 return;
559 if (e.keyCode == 27)
560 confirmStopGame();
561 else if (e.keyCode == 32) {
562 e.preventDefault();
563 toggleGameInfos();
564 }
565 });