Attempt to fix README.md for gitweb parser
[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 = "";
134 if (V.Options.select) {
135 optHtml += V.Options.select.map(select => { return `
136 <div class="option-select">
137 <label for="var_${select.variable}">${select.label}</label>
138 <div class="select">
139 <select id="var_${select.variable}">` +
140 select.options.map(option => { return `
141 <option
142 value="${option.value}"
143 ${option.value == select.defaut ? " selected" : ""}
144 >
145 ${option.label}
146 </option>`;
147 }).join("") + `
148 </select>
149 <span class="focus"></span>
150 </div>
151 </div>`;
152 }).join("");
153 }
154 if (V.Options.input) {
155 optHtml += V.Options.input.map(input => { return `
156 <div class="option-input">
157 <label class="input">
158 <input id="var_${input.variable}"
159 type="${input.type}"
160 ${input.type == "checkbox" && input.defaut
161 ? "checked"
162 : 'value="' + input.defaut + '"'}
163 />
164 <span class="spacer"></span>
165 <span>${input.label}</span>
166 </label>
167 </div>`;
168 }).join("");
169 }
170 if (V.Options.styles) {
171 optHtml += '<div class="words">';
172 let i = 0;
173 const stylesLength = V.Options.styles.length;
174 while (i < stylesLength) {
175 optHtml += '<div class="row">';
176 for (let j=i; j<i+4; j++) {
177 if (j == stylesLength)
178 break;
179 const style = V.Options.styles[j];
180 optHtml += `<span onClick="toggleStyle(event, this)">${style}</span>`;
181 }
182 optHtml += "</div>";
183 i += 4;
184 }
185 optHtml += "</div>";
186 }
187 $.getElementById("gameOptions").innerHTML = optHtml;
188 }
189
190 function getGameLink() {
191 const vname = $.getElementById("selectVariant").value;
192 const color = $.getElementById("selectColor").value;
193 for (const select of $.querySelectorAll("#gameOptions select")) {
194 let value = parseInt(select.value, 10);
195 if (isNaN(value)) //not an integer
196 value = select.value;
197 options[ select.id.split("_")[1] ] = value;
198 }
199 for (const input of $.querySelectorAll("#gameOptions input")) {
200 const variable = input.id.split("_")[1];
201 if (input.type == "number")
202 options[variable] = parseInt(input.value, 10); //TODO: real numbers?
203 else if (input.type == "checkbox")
204 options[variable] = input.checked;
205 }
206 send("creategame", {
207 vname: vname,
208 player: {sid: sid, name: localStorage.getItem("name"), color: color},
209 options: options
210 });
211 }
212
213 function fillGameInfos(gameInfos, oppIndex) {
214 fetch(`/variants/${gameInfos.vname}/rules.html`)
215 .then(res => res.text())
216 .then(txt => {
217 let htmlContent = `
218 <div class="players-info">
219 <p>
220 <span class="bold">${gameInfos.vdisp}</span>
221 <span>vs. ${gameInfos.players[oppIndex].name}</span>
222 </p>
223 </div>`;
224 const options = Object.entries(gameInfos.options);
225 if (options.length > 0) {
226 htmlContent += '<div class="options-info">';
227 let i = 0;
228 while (i < options.length) {
229 htmlContent += '<div class="row">';
230 for (let j=i; j<i+4; j++) {
231 if (j == options.length)
232 break;
233 const opt = options[j];
234 if (!opt[1]) //includes 0 and false (lighter display)
235 continue;
236 htmlContent +=
237 '<span class="option">' +
238 (opt[1] === true ? opt[0] : `${opt[0]}:${opt[1]}`) + " " +
239 "</span>";
240 }
241 htmlContent += "</div>";
242 i += 4;
243 }
244 htmlContent += "</div>";
245 }
246 htmlContent += `
247 <div class="rules">${txt}</div>
248 <div class="btn-wrap">
249 <button onClick="toggleGameInfos()">Back to game</button>
250 </div>`;
251 $.getElementById("gameInfos").innerHTML = htmlContent;
252 });
253 }
254
255 ////////////////
256 // Communication
257
258 let socket, gid, recoAttempt = 0;
259 const autoReconnectDelay = () => {
260 return [100, 200, 500, 1000, 3000, 10000, 30000][Math.min(recoAttempt, 6)];
261 };
262
263 function send(code, data, opts) {
264 opts = opts || {};
265 const trySend = () => {
266 if (socket.readyState == 1) {
267 socket.send(JSON.stringify(Object.assign({code: code}, data)));
268 if (opts.success)
269 opts.success();
270 return true;
271 }
272 return false;
273 };
274 const firstTry = trySend();
275 if (!firstTry) {
276 if (opts.retry) {
277 // Retry for a few seconds (sending move)
278 let sendAttempt = 1;
279 const retryLoop = setInterval(
280 () => {
281 if (trySend() || ++sendAttempt >= 3)
282 clearInterval(retryLoop);
283 if (sendAttempt >= 3 && opts.error)
284 opts.error();
285 },
286 1000
287 );
288 }
289 else if (opts.error)
290 opts.error();
291 }
292 return firstTry;
293 }
294
295 function copyClipboard(msg) {
296 navigator.clipboard.writeText(msg);
297 }
298 function getWhatsApp(msg) {
299 return `https://api.whatsapp.com/send?text=${encodeURIComponent(msg)}`;
300 }
301
302 const tryResumeGame = () => {
303 recoAttempt = 0;
304 // If a game is found, resume it:
305 if (localStorage.getItem("gid")) {
306 gid = localStorage.getItem("gid");
307 send("getgame",
308 {gid: gid},
309 {
310 retry: true,
311 error: () => alert("Cannot load game: no connection")
312 });
313 }
314 else {
315 // If URL indicates "play with a friend", start game:
316 const hashIdx = document.URL.indexOf('#');
317 if (hashIdx >= 0) {
318 const urlParts = $.URL.split('#');
319 gid = urlParts[1];
320 localStorage.setItem("gid", gid);
321 history.replaceState(null, '', urlParts[0]); //hide game ID
322 send("joingame",
323 {gid: gid, name: localStorage.getItem("name")},
324 {
325 retry: true,
326 error: () => alert("Cannot load game: no connection")
327 });
328 }
329 }
330 };
331
332 const messageCenter = (msg) => {
333 const obj = JSON.parse(msg.data);
334 switch (obj.code) {
335 // Start new game:
336 case "gamestart": {
337 if (document.hidden)
338 notifyMe("game");
339 gid = obj.gid;
340 initializeGame(obj);
341 break;
342 }
343 // Game vs. friend just created on server: share link now
344 case "gamecreated": {
345 const link = `${Params.http_server}/#${obj.gid}`;
346 $.getElementById("gameLink").innerHTML = `
347 <p>
348 <a href="${getWhatsApp(link)}">WhatsApp</a>
349 /
350 <span onClick="copyClipboard('${link}')">ToClipboard</span>
351 </p>
352 <p>${link}</p>
353 `;
354 break;
355 }
356 // Game vs. friend joined after 1 minute (try again!)
357 case "jointoolate":
358 alert("Game no longer available");
359 break;
360 // Get infos of a running game (already launched)
361 case "gameinfo":
362 initializeGame(obj);
363 break;
364 // Tried to resume a game which is now gone:
365 case "nogame":
366 localStorage.removeItem("gid");
367 break;
368 // Receive opponent's move:
369 case "newmove":
370 // Basic check: was it really opponent's turn?
371 if (vr.turn == playerColor)
372 break;
373 if (document.hidden)
374 notifyMe("move");
375 vr.playReceivedMove(obj.moves, () => {
376 if (vr.getCurrentScore(obj.moves) != "*") {
377 localStorage.removeItem("gid");
378 setTimeout( () => toggleVisible("gameStopped"), 2000 );
379 }
380 else
381 toggleTurnIndicator(true);
382 });
383 break;
384 // Opponent stopped game (draw, abort, resign...)
385 case "gameover":
386 toggleVisible("gameStopped");
387 localStorage.removeItem("gid");
388 break;
389 // Opponent cancelled rematch:
390 case "closerematch":
391 toggleVisible("newGame");
392 break;
393 case "filechange":
394 // TODO?: could be more subtle
395 setTimeout(() => location.reload(), 100);
396 break;
397 }
398 };
399
400 const handleError = (err) => {
401 if (err.code === "ECONNREFUSED") {
402 removeAllListeners();
403 alert("Server refused connection. Please reload page later");
404 }
405 socket.close();
406 };
407
408 const handleClose = () => {
409 setTimeout(() => {
410 removeAllListeners();
411 connectToWSS();
412 }, autoReconnectDelay());
413 };
414
415 function removeAllListeners() {
416 socket.removeEventListener("open", tryResumeGame);
417 socket.removeEventListener("message", messageCenter);
418 socket.removeEventListener("error", handleError);
419 socket.removeEventListener("close", handleClose);
420 }
421
422 function connectToWSS() {
423 socket =
424 new WebSocket(`${Params.socket_server}${Params.socket_path}?sid=${sid}`);
425 socket.addEventListener("open", tryResumeGame);
426 socket.addEventListener("message", messageCenter);
427 socket.addEventListener("error", handleError);
428 socket.addEventListener("close", handleClose);
429 recoAttempt++;
430 }
431 connectToWSS();
432
433 ///////////
434 // Playing
435
436 function toggleTurnIndicator(myTurn) {
437 let indicator =
438 $.getElementById("boardContainer").querySelector(".chessboard");
439 if (myTurn)
440 indicator.style.outline = "thick solid green";
441 else
442 indicator.style.outline = "thick solid lightgrey";
443 }
444
445 function notifyMe(code) {
446 const doNotify = () => {
447 // NOTE: empty body (TODO?)
448 new Notification("New " + code, { vibrate: [200, 100, 200] });
449 new Audio("/assets/new_" + code + ".mp3").play();
450 }
451 if (Notification.permission === "granted")
452 doNotify();
453 else if (Notification.permission !== "denied") {
454 Notification.requestPermission().then(permission => {
455 if (permission === "granted")
456 doNotify();
457 });
458 }
459 }
460
461 let curMoves = [],
462 lastFen;
463 const afterPlay = (move_s, newTurn, ops) => {
464 if (ops.send) {
465 // Pack into one moves array, then send (if turn changed)
466 if (Array.isArray(move_s))
467 // Array of simple moves (e.g. Chakart)
468 Array.prototype.push.apply(curMoves, move_s);
469 else
470 // Usual case
471 curMoves.push(move_s);
472 if (newTurn != playerColor) {
473 send("newmove",
474 {gid: gid, moves: curMoves, fen: vr.getFen()},
475 {
476 retry: true,
477 error: () => alert("Move not sent: reload page")
478 }
479 );
480 }
481 }
482 if (ops.res && newTurn != playerColor) {
483 toggleTurnIndicator(false); //now all moves are sent and animated
484 const result = vr.getCurrentScore(curMoves);
485 curMoves = [];
486 if (result != "*") {
487 setTimeout(() => {
488 toggleVisible("gameStopped");
489 send("gameover", {gid: gid});
490 }, 2000);
491 }
492 }
493 };
494
495 let vr = null, playerColor, lastVname = undefined;
496 function initializeGame(obj) {
497 const options = obj.options || {};
498 import(`/variants/${obj.vname}/class.js`).then(module => {
499 window.V = module.default;
500 for (const [k, v] of Object.entries(V.Aliases))
501 window[k] = v;
502 if (lastVname != obj.vname) {
503 // Load CSS + unload potential previous one.
504 if (lastVname)
505 document.getElementById(lastVname + "_css").remove();
506 $.getElementsByTagName("head")[0].insertAdjacentHTML(
507 "beforeend",
508 `<link id="${obj.vname + '_css'}" rel="stylesheet"
509 href="/variants/${obj.vname}/style.css"/>`);
510 lastVname = obj.vname;
511 }
512 playerColor = (sid == obj.players[0].sid ? "w" : "b");
513 // Init + remove potential extra DOM elements from a previous game:
514 document.getElementById("boardContainer").innerHTML = `
515 <div id="upLeftInfos"
516 onClick="toggleGameInfos()">
517 <svg version="1.1"
518 viewBox="0.5 0.5 100 100">
519 <g>
520 <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"/>
521 </g>
522 </svg>
523 </div>
524 <div id="upRightStop"
525 onClick="confirmStopGame()">
526 <svg version="1.1"
527 viewBox="0 0 533.333 533.333">
528 <g>
529 <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"/>
530 </g>
531 </svg>
532 </div>
533 <div class="chessboard"></div>`;
534 if (vr)
535 // Avoid interferences:
536 vr.removeListeners();
537 vr = new V({
538 seed: obj.seed, //may be null if FEN already exists (running game)
539 fen: obj.fen,
540 element: "boardContainer",
541 color: playerColor,
542 afterPlay: afterPlay,
543 options: options
544 });
545 const gameCreation = !obj.fen;
546 if (gameCreation) {
547 // Both players set FEN, in case of one is offline
548 send("setfen", {gid: obj.gid, fen: vr.getFen()});
549 localStorage.setItem("gid", obj.gid);
550 }
551 const select = $.getElementById("selectVariant");
552 obj.vdisp = "";
553 for (let i=0; i<select.options.length; i++) {
554 if (select.options[i].value == obj.vname) {
555 obj.vdisp = select.options[i].text;
556 break;
557 }
558 }
559 const playerIndex = (playerColor == "w" ? 0 : 1);
560 fillGameInfos(obj, 1 - playerIndex);
561 if (obj.players[playerIndex].randvar && gameCreation)
562 toggleVisible("gameInfos");
563 else
564 toggleVisible("boardContainer");
565 toggleTurnIndicator(vr.turn == playerColor);
566 });
567 }
568
569 function confirmStopGame() {
570 if (confirm("Stop game?") && send("gameover", {gid: gid, relay: true})) {
571 localStorage.removeItem("gid");
572 toggleVisible("gameStopped");
573 }
574 }
575
576 function toggleGameInfos() {
577 if ($.getElementById("gameInfos").style.display == "none")
578 toggleVisible("gameInfos");
579 else
580 toggleVisible("boardContainer");
581 }
582
583 $.body.addEventListener("keydown", (e) => {
584 if (!localStorage.getItem("gid"))
585 return;
586 if (e.keyCode == 27)
587 confirmStopGame();
588 else if (e.keyCode == 32) {
589 e.preventDefault();
590 toggleGameInfos();
591 }
592 });