676b8955e9f1bbbb4117c55f18e24e500eace5f3
[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) formField.classList.add("form-field--is-active");
38 else {
39 formField.classList.remove("form-field--is-active");
40 inputName.value == ''
41 ? formField.classList.remove("form-field--is-filled")
42 : formField.classList.add("form-field--is-filled");
43 }
44 };
45 setActive(true);
46 inputName.onblur = () => setActive(false);
47 inputName.onfocus = () => setActive(true);
48
49 /////////
50 // Utils
51
52 function setName() {
53 // 'onChange' event on name input text field [HTML]
54 localStorage.setItem("name", $.getElementById("myName").value);
55 }
56
57 // Turn a "tab" on, and "close" all others
58 function toggleVisible(element) {
59 for (elt of document.querySelectorAll("main > div")) {
60 if (elt.id != element) elt.style.display = "none";
61 else elt.style.display = "block";
62 }
63 if (element == "boardContainer") {
64 // Avoid smartphone scrolling effects (TODO?)
65 document.querySelector("html").style.overflow = "hidden";
66 document.body.style.overflow = "hidden";
67 }
68 else {
69 document.querySelector("html").style.overflow = "visible";
70 document.body.style.overflow = "visible";
71 // Workaround "superposed texts" effect:
72 if (element == "newGame") setActive(false);
73 }
74 }
75
76 let seek_vname;
77 function seekGame() {
78 seek_vname = $.getElementById("selectVariant").value;
79 if (send("seekgame",
80 {vname: seek_vname, name: localStorage.getItem("name")})
81 ) {
82 toggleVisible("pendingSeek");
83 }
84 }
85 function cancelSeek() {
86 if (send("cancelseek", {vname: seek_vname})) toggleVisible("newGame");
87 }
88
89 function sendRematch(random) {
90 if (send("rematch", {gid: gid, random: !!random}))
91 toggleVisible("pendingRematch");
92 }
93 function cancelRematch() {
94 if (send("norematch", {gid: gid})) toggleVisible("newGame");
95 }
96
97 // Play with a friend (or not ^^)
98 function showNewGameForm() {
99 const vname = $.getElementById("selectVariant").value;
100 if (vname == "_random") alert("Select a variant first");
101 else {
102 $.getElementById("gameLink").innerHTML = "";
103 $.getElementById("selectColor").selectedIndex = 0;
104 toggleVisible("newGameForm");
105 import(`/variants/${vname}/class.js`).then(module => {
106 window.V = module.default;
107 for (const [k, v] of Object.entries(V.Aliases)) window[k] = v;
108 prepareOptions();
109 });
110 }
111 }
112 function backToNormalSeek() {
113 toggleVisible("newGame");
114 }
115
116 function toggleStyle(event, obj) {
117 const word = obj.innerHTML;
118 options[word] = !options[word];
119 event.target.classList.toggle("highlight-word");
120 }
121
122 let options;
123 function prepareOptions() {
124 options = {};
125 let optHtml = V.Options.select.map(select => { return `
126 <div class="option-select">
127 <label for="var_${select.variable}">${select.label}</label>
128 <div class="select">
129 <select id="var_${select.variable}" data-numeric="1">` +
130 select.options.map(option => { return `
131 <option
132 value="${option.value}"
133 ${option.value == select.defaut ? " selected" : ""}
134 >
135 ${option.label}
136 </option>`;
137 }).join("") + `
138 </select>
139 <span class="focus"></span>
140 </div>
141 </div>`;
142 }).join("");
143 optHtml += V.Options.check.map(check => {
144 return `
145 <div class="option-check">
146 <label class="checkbox">
147 <input id="var_${check.variable}"
148 type="checkbox"${check.defaut ? " checked" : ""}/>
149 <span class="spacer"></span>
150 <span>${check.label}</span>
151 </label>
152 </div>`;
153 }).join("");
154 if (V.Options.styles.length >= 1) {
155 optHtml += '<div class="words">';
156 let i = 0;
157 const stylesLength = V.Options.styles.length;
158 while (i < stylesLength) {
159 optHtml += '<div class="row">';
160 for (let j=i; j<i+4; j++) {
161 if (j == stylesLength) break;
162 const style = V.Options.styles[j];
163 optHtml += `<span onClick="toggleStyle(event, this)">${style}</span>`;
164 }
165 optHtml += "</div>";
166 i += 4;
167 }
168 optHtml += "</div>";
169 }
170 $.getElementById("gameOptions").innerHTML = optHtml;
171 }
172
173 function getGameLink() {
174 const vname = $.getElementById("selectVariant").value;
175 const color = $.getElementById("selectColor").value;
176 for (const select of $.querySelectorAll("#gameOptions select")) {
177 let value = select.value;
178 if (select.attributes["data-numeric"]) value = parseInt(value, 10);
179 if (value) options[ select.id.split("_")[1] ] = value;
180 }
181 for (const check of $.querySelectorAll("#gameOptions input")) {
182 if (check.checked) options[ check.id.split("_")[1] ] = check.checked;
183 }
184 send("creategame", {
185 vname: vname,
186 player: {sid: sid, name: localStorage.getItem("name"), color: color},
187 options: options
188 });
189 }
190
191 function fillGameInfos(gameInfos, oppIndex) {
192 fetch(`/variants/${gameInfos.vname}/rules.html`)
193 .then(res => res.text())
194 .then(txt => {
195 let htmlContent = `
196 <div class="players-info">
197 <p>
198 <span class="bold">${gameInfos.vdisp}</span>
199 <span>vs. ${gameInfos.players[oppIndex].name}</span>
200 </p>
201 </div>`;
202 const options = Object.entries(gameInfos.options);
203 if (options.length > 0) {
204 htmlContent += '<div class="options-info">';
205 let i = 0;
206 while (i < options.length) {
207 htmlContent += '<div class="row">';
208 for (let j=i; j<i+4; j++) {
209 if (j == options.length) break;
210 const opt = options[j];
211 if (!opt[1]) continue;
212 htmlContent +=
213 '<span class="option">' +
214 (opt[1] === true ? opt[0] : `${opt[0]}:${opt[1]}`) + " " +
215 "</span>";
216 }
217 htmlContent += "</div>";
218 i += 4;
219 }
220 htmlContent += "</div>";
221 }
222 htmlContent += `
223 <div class="rules">${txt}</div>
224 <div class="btn-wrap">
225 <button onClick="toggleGameInfos()">Back to game</button>
226 </div>`;
227 $.getElementById("gameInfos").innerHTML = htmlContent;
228 });
229 }
230
231 ////////////////
232 // Communication
233
234 let socket, gid, recoAttempt = 0;
235 const autoReconnectDelay = () => {
236 return [100, 200, 500, 1000, 3000, 10000, 30000][Math.min(recoAttempt, 6)];
237 };
238
239 function send(code, data, opts) {
240 opts = opts || {};
241 const trySend = () => {
242 if (socket.readyState == 1) {
243 socket.send(JSON.stringify(Object.assign({code: code}, data)));
244 if (opts.success) opts.success();
245 return true;
246 }
247 return false;
248 };
249 const firstTry = trySend();
250 if (!firstTry) {
251 if (opts.retry) {
252 // Retry for a few seconds (sending move)
253 let sendAttempt = 1;
254 const retryLoop = setInterval(
255 () => {
256 if (trySend() || ++sendAttempt >= 3) clearInterval(retryLoop);
257 if (sendAttempt >= 3 && opts.error) opts.error();
258 },
259 1000
260 );
261 }
262 else if (opt.error) opts.error();
263 }
264 return firstTry;
265 }
266
267 function copyClipboard(msg) {
268 navigator.clipboard.writeText(msg);
269 }
270 function getWhatsApp(msg) {
271 return `https://api.whatsapp.com/send?text=${encodeURIComponent(msg)}`;
272 }
273
274 const tryResumeGame = () => {
275 recoAttempt = 0;
276 // If a game is found, resume it:
277 if (localStorage.getItem("gid")) {
278 gid = localStorage.getItem("gid");
279 send("getgame",
280 {gid: gid},
281 {
282 retry: true,
283 error: () => alert("Cannot load game: no connection")
284 });
285 }
286 else {
287 // If URL indicates "play with a friend", start game:
288 const hashIdx = document.URL.indexOf('#');
289 if (hashIdx >= 0) {
290 const urlParts = $.URL.split('#');
291 gid = urlParts[1];
292 localStorage.setItem("gid", gid);
293 history.replaceState(null, '', urlParts[0]); //hide game ID
294 send("joingame",
295 {gid: gid, name: localStorage.getItem("name")},
296 {
297 retry: true,
298 error: () => alert("Cannot load game: no connection")
299 });
300 }
301 }
302 };
303
304 const messageCenter = (msg) => {
305 const obj = JSON.parse(msg.data);
306 switch (obj.code) {
307 // Start new game:
308 case "gamestart": {
309 if (document.hidden) notifyMe("game");
310 gid = obj.gid;
311 initializeGame(obj);
312 break;
313 }
314 // Game vs. friend just created on server: share link now
315 case "gamecreated": {
316 const link = `${Params.http_server}/#${obj.gid}`;
317 $.getElementById("gameLink").innerHTML = `
318 <p>
319 <a href="${getWhatsApp(link)}">WhatsApp</a>
320 /
321 <span onClick="copyClipboard('${link}')">ToClipboard</span>
322 </p>
323 <p>${link}</p>
324 `;
325 break;
326 }
327 // Game vs. friend joined after 1 minute (try again!)
328 case "jointoolate":
329 alert("Game no longer available");
330 break;
331 // Get infos of a running game (already launched)
332 case "gameinfo":
333 initializeGame(obj);
334 break;
335 // Tried to resume a game which is now gone:
336 case "nogame":
337 localStorage.removeItem("gid");
338 break;
339 // Receive opponent's move:
340 case "newmove":
341 // Basic check: was it really opponent's turn?
342 if (vr.turn == playerColor) break;
343 if (document.hidden) notifyMe("move");
344 vr.playReceivedMove(obj.moves, () => {
345 if (vr.getCurrentScore(obj.moves[obj.moves.length-1]) != "*") {
346 localStorage.removeItem("gid");
347 setTimeout( () => toggleVisible("gameStopped"), 2000 );
348 }
349 else toggleTurnIndicator(true);
350 });
351 break;
352 // Opponent stopped game (draw, abort, resign...)
353 case "gameover":
354 toggleVisible("gameStopped");
355 localStorage.removeItem("gid");
356 break;
357 // Opponent cancelled rematch:
358 case "closerematch":
359 toggleVisible("newGame");
360 break;
361 }
362 };
363
364 const handleError = (err) => {
365 if (err.code === "ECONNREFUSED") {
366 removeAllListeners();
367 alert("Server refused connection. Please reload page later");
368 }
369 socket.close();
370 };
371
372 const handleClose = () => {
373 setTimeout(() => {
374 removeAllListeners();
375 connectToWSS();
376 }, autoReconnectDelay());
377 };
378
379 function removeAllListeners() {
380 socket.removeEventListener("open", tryResumeGame);
381 socket.removeEventListener("message", messageCenter);
382 socket.removeEventListener("error", handleError);
383 socket.removeEventListener("close", handleClose);
384 }
385
386 function connectToWSS() {
387 socket =
388 new WebSocket(`${Params.socket_server}${Params.socket_path}?sid=${sid}`);
389 socket.addEventListener("open", tryResumeGame);
390 socket.addEventListener("message", messageCenter);
391 socket.addEventListener("error", handleError);
392 socket.addEventListener("close", handleClose);
393 recoAttempt++;
394 }
395 connectToWSS();
396
397 ///////////
398 // Playing
399
400 function toggleTurnIndicator(myTurn) {
401 let indicator =
402 $.getElementById("boardContainer").querySelector(".chessboard");
403 if (myTurn) indicator.style.outline = "thick solid green";
404 else indicator.style.outline = "thick solid lightgrey";
405 }
406
407 function notifyMe(code) {
408 const doNotify = () => {
409 // NOTE: empty body (TODO?)
410 new Notification("New " + code, { vibrate: [200, 100, 200] });
411 new Audio("/assets/new_" + code + ".mp3").play();
412 }
413 if (Notification.permission === "granted") doNotify();
414 else if (Notification.permission !== "denied") {
415 Notification.requestPermission().then(permission => {
416 if (permission === "granted") doNotify();
417 });
418 }
419 }
420
421 let curMoves = [],
422 lastFen;
423 const afterPlay = (move) => {
424 const callbackAfterSend = () => {
425 curMoves = [];
426 const result = vr.getCurrentScore(move);
427 if (result != "*") {
428 setTimeout(() => {
429 toggleVisible("gameStopped");
430 send("gameover", {gid: gid});
431 }, 2000);
432 }
433 };
434 // Pack into one moves array, then send
435 curMoves.push(move);
436 if (vr.turn != playerColor) {
437 toggleTurnIndicator(false);
438 send("newmove",
439 {gid: gid, moves: curMoves, fen: vr.getFen()},
440 {
441 retry: true,
442 success: callbackAfterSend,
443 error: () => alert("Move not sent: reload page")
444 });
445 }
446 };
447
448 let vr, playerColor;
449 function initializeGame(obj) {
450 const options = obj.options || {};
451 import(`/variants/${obj.vname}/class.js`).then(module => {
452 window.V = module.default;
453 for (const [k, v] of Object.entries(V.Aliases)) window[k] = v;
454 // Load CSS. Avoid loading twice the same stylesheet:
455 const allIds = [].slice.call($.styleSheets).map(s => s.id);
456 const newId = obj.vname + "_css";
457 if (!allIds.includes(newId)) {
458 $.getElementsByTagName("head")[0].insertAdjacentHTML(
459 "beforeend",
460 `<link id="${newId}" rel="stylesheet"
461 href="/variants/${obj.vname}/style.css"/>`);
462 }
463 playerColor = (sid == obj.players[0].sid ? "w" : "b");
464 // Init + remove potential extra DOM elements from a previous game:
465 document.getElementById("boardContainer").innerHTML = `
466 <div id="upLeftInfos"
467 onClick="toggleGameInfos()">
468 <svg version="1.1"
469 viewBox="0.5 0.5 100 100">
470 <g>
471 <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"/>
472 </g>
473 </svg>
474 </div>
475 <div id="upRightStop"
476 onClick="confirmStopGame()">
477 <svg version="1.1"
478 viewBox="0 0 533.333 533.333">
479 <g>
480 <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"/>
481 </g>
482 </svg>
483 </div>
484 <div class="resizeable chessboard"></div>`;
485 vr = new V({
486 seed: obj.seed, //may be null if FEN already exists (running game)
487 fen: obj.fen,
488 element: "boardContainer",
489 color: playerColor,
490 afterPlay: afterPlay,
491 options: options
492 });
493 if (!obj.fen) {
494 // Game creation: both players set FEN, in case of one is offline
495 send("setfen", {gid: obj.gid, fen: vr.getFen()});
496 localStorage.setItem("gid", obj.gid);
497 }
498 const select = $.getElementById("selectVariant");
499 obj.vdisp = "";
500 for (let i=0; i<select.options.length; i++) {
501 if (select.options[i].value == obj.vname) {
502 obj.vdisp = select.options[i].text;
503 break;
504 }
505 }
506 fillGameInfos(obj, playerColor == "w" ? 1 : 0);
507 if (obj.randvar) toggleVisible("gameInfos");
508 else toggleVisible("boardContainer");
509 toggleTurnIndicator(vr.turn == playerColor);
510 });
511 }
512
513 function confirmStopGame() {
514 if (confirm("Stop game?") && send("gameover", {gid: gid, relay: true})) {
515 localStorage.removeItem("gid");
516 toggleVisible("gameStopped");
517 }
518 }
519
520 function toggleGameInfos() {
521 if ($.getElementById("gameInfos").style.display == "none")
522 toggleVisible("gameInfos");
523 else toggleVisible("boardContainer");
524 }
525
526 $.body.addEventListener("keydown", (e) => {
527 if (!localStorage.getItem("gid")) return;
528 if (e.keyCode == 27) confirmStopGame();
529 else if (e.keyCode == 32) {
530 e.preventDefault();
531 toggleGameInfos();
532 }
533 });