Attempt to prevent 'lost moves'...
[xogo.git] / app.js
1 let $ = document; //shortcut
2
3 ///////////////////
4 // Initialisations
5
6 // https://stackoverflow.com/a/27747377/12660887
7 function dec2hex (dec) { return dec.toString(16).padStart(2, "0") }
8 function generateId (len) {
9 var arr = new Uint8Array((len || 40) / 2)
10 window.crypto.getRandomValues(arr)
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 inputName.onblur = () => setActive(false);
46 inputName.onfocus = () => setActive(true);
47 inputName.focus();
48
49 /////////
50 // Utils
51
52 function setName() {
53 localStorage.setItem("name", $.getElementById("myName").value);
54 }
55
56 // Turn a "tab" on, and "close" all others
57 function toggleVisible(element) {
58 for (elt of document.querySelectorAll('main > div')) {
59 if (elt.id != element) elt.style.display = "none";
60 else elt.style.display = "block";
61 }
62 if (element == "boardContainer") {
63 // Avoid smartphone scrolling effects (TODO?)
64 document.querySelector("html").style.overflow = "hidden";
65 document.body.style.overflow = "hidden";
66 }
67 else {
68 document.querySelector("html").style.overflow = "visible";
69 document.body.style.overflow = "visible";
70 if (element == "newGame") {
71 // Workaround "superposed texts" effect
72 inputName.focus();
73 inputName.blur();
74 }
75 }
76 }
77
78 let seek_vname;
79 function seekGame() {
80 seek_vname = $.getElementById("selectVariant").value;
81 send("seekgame", {vname: seek_vname, name: localStorage.getItem("name")});
82 toggleVisible("pendingSeek");
83 }
84 function cancelSeek() {
85 send("cancelseek", {vname: seek_vname});
86 toggleVisible("newGame");
87 }
88
89 function sendRematch() {
90 send("rematch", { gid: gid });
91 toggleVisible("pendingRematch");
92 }
93 function cancelRematch() {
94 send("norematch", { gid: gid });
95 toggleVisible("newGame");
96 }
97
98 // Play with a friend (or not ^^)
99 function showNewGameForm() {
100 const vname = $.getElementById("selectVariant").value;
101 if (vname == "_random") alert("Select a variant first");
102 else {
103 $.getElementById("gameLink").innerHTML = "";
104 $.getElementById("selectColor").selectedIndex = 0;
105 toggleVisible("newGameForm");
106 import(`/variants/${vname}/class.js`).then(module => {
107 window.V = module.default;
108 prepareOptions();
109 });
110 }
111 }
112 function backToNormalSeek() { toggleVisible("newGame"); }
113
114 function toggleStyle(e, word) {
115 options[word] = !options[word];
116 e.target.classList.toggle("highlight-word");
117 }
118
119 let options;
120 function prepareOptions() {
121 options = {};
122 let optHtml = V.Options.select.map(select => { return `
123 <div class="option-select">
124 <label for="var_${select.variable}">${select.label}</label>
125 <div class="select">
126 <select id="var_${select.variable}" data-numeric="1">` +
127 select.options.map(option => { return `
128 <option
129 value="${option.value}"
130 ${option.value == select.defaut ? " selected" : ""}
131 >
132 ${option.label}
133 </option>`;
134 }).join("") + `
135 </select>
136 <span class="focus"></span>
137 </div>
138 </div>`;
139 }).join("");
140 optHtml += V.Options.check.map(check => {
141 return `
142 <div class="option-check">
143 <label class="checkbox">
144 <input id="var_${check.variable}"
145 type="checkbox"${check.defaut ? " checked" : ""}/>
146 <span class="spacer"></span>
147 <span>${check.label}</span>
148 </label>
149 </div>`;
150 }).join("");
151 if (V.Options.styles.length >= 1) {
152 optHtml += '<div class="words">';
153 let i = 0;
154 const stylesLength = V.Options.styles.length;
155 while (i < stylesLength) {
156 optHtml += '<div class="row">';
157 for (let j=i; j<i+4; j++) {
158 if (j == stylesLength) break;
159 const style = V.Options.styles[j];
160 optHtml +=
161 `<span onClick="toggleStyle(event, '${style}')">${style}</span>`;
162 }
163 optHtml += "</div>";
164 i += 4;
165 }
166 optHtml += "</div>";
167 }
168 $.getElementById("gameOptions").innerHTML = optHtml;
169 }
170
171 function getGameLink() {
172 const vname = $.getElementById("selectVariant").value;
173 const color = $.getElementById("selectColor").value;
174 for (const select of $.querySelectorAll("#gameOptions select")) {
175 let value = select.value;
176 if (select.attributes["data-numeric"]) value = parseInt(value, 10);
177 if (value) options[ select.id.split("_")[1] ] = value;
178 }
179 for (const check of $.querySelectorAll("#gameOptions input")) {
180 if (check.checked) options[ check.id.split("_")[1] ] = check.checked;
181 }
182 send("creategame", {
183 vname: vname,
184 player: { sid: sid, name: localStorage.getItem("name"), color: color },
185 options: options
186 });
187 }
188
189 const fillGameInfos = (gameInfos, oppIndex) => {
190 fetch(`/variants/${gameInfos.vname}/rules.html`)
191 .then(res => res.text())
192 .then(txt => {
193 let htmlContent = `
194 <div class="players-info">
195 <p>
196 <span class="bold">${gameInfos.vdisp}</span>
197 <span>vs. ${gameInfos.players[oppIndex].name}</span>
198 </p>
199 </div>`;
200 const options = Object.entries(gameInfos.options);
201 if (options.length > 0) {
202 htmlContent += '<div class="options-info">';
203 let i = 0;
204 while (i < options.length) {
205 htmlContent += '<div class="row">';
206 for (let j=i; j<i+4; j++) {
207 if (j == options.length) break;
208 const opt = options[j];
209 htmlContent +=
210 '<span class="option">' +
211 (opt[1] === true ? opt[0] : `${opt[0]}:${opt[1]}`) + " " +
212 '</span>';
213 }
214 htmlContent += "</div>";
215 i += 4;
216 }
217 htmlContent += "</div>";
218 }
219 htmlContent += `
220 <div class="rules">${txt}</div>
221 <div class="btn-wrap">
222 <button onClick="toggleGameInfos()">Back to game</button>
223 </div>`;
224 $.getElementById("gameInfos").innerHTML = htmlContent;
225 });
226 };
227
228 ////////////////
229 // Communication
230
231 let socket, gid, attempt = 0;
232 const autoReconnectDelay = () => {
233 return [100, 200, 500, 1000, 3000, 10000, 30000][Math.min(attempt, 6)];
234 };
235
236 function copyClipboard(msg) { navigator.clipboard.writeText(msg); }
237 function getWhatsApp(msg) {
238 return `https://api.whatsapp.com/send?text=${encodeURIComponent(msg)}`;
239 }
240
241 const tryResumeGame = () => {
242 attempt = 0;
243 // If a game is found, resume it:
244 if (localStorage.getItem("gid")) {
245 gid = localStorage.getItem("gid");
246 send("getgame", { gid: gid });
247 }
248 else {
249 // If URL indicates "play with a friend", start game:
250 const hashIdx = document.URL.indexOf('#');
251 if (hashIdx >= 0) {
252 const urlParts = $.URL.split('#');
253 gid = urlParts[1];
254 send("joingame", { gid: gid, name: localStorage.getItem("name") });
255 localStorage.setItem("gid", gid);
256 history.replaceState(null, '', urlParts[0]);
257 }
258 }
259 };
260
261 const messageCenter = (msg) => {
262 const obj = JSON.parse(msg.data);
263 switch (obj.code) {
264 // Start new game:
265 case "gamestart": {
266 if (document.hidden) notifyMe("game");
267 gid = obj.gid;
268 initializeGame(obj);
269 break;
270 }
271 // Game vs. friend just created on server: share link now
272 case "gamecreated": {
273 const link = `${Params.http_server}/#${obj.gid}`;
274 $.getElementById("gameLink").innerHTML = `
275 <p>
276 <a href="${getWhatsApp(link)}">WhatsApp</a>
277 /
278 <span onClick='copyClipboard("${link}")'>ToClipboard</span>
279 </p>
280 <p>${link}</p>
281 `;
282 break;
283 }
284 // Game vs. friend joined after 1 minute (try again!)
285 case "jointoolate":
286 alert("Game no longer available");
287 break;
288 // Get infos of a running game (already launched)
289 case "gameinfo":
290 initializeGame(obj);
291 break;
292 // Tried to resume a game which is now gone:
293 case "nogame":
294 localStorage.removeItem("gid");
295 break;
296 // Receive opponent's move:
297 case "newmove":
298 send("gotmove", {fen: obj.fen, gid: gid});
299 if (obj.fen == lastFen) break; //got this move already
300 lastFen = obj.fen;
301 if (document.hidden) notifyMe("move");
302 vr.playReceivedMove(obj.moves, () => {
303 if (vr.getCurrentScore(obj.moves[obj.moves.length-1]) != "*") {
304 localStorage.removeItem("gid");
305 setTimeout( () => toggleVisible("gameStopped"), 2000 );
306 }
307 else toggleTurnIndicator(true);
308 });
309 break;
310 // The server notifies that it got our move:
311 case "gotmove":
312 if (obj.fen == lastFen) {
313 curMoves = [];
314 clearTimeout(timeout1);
315 clearTimeout(timeout2);
316 clearTimeout(timeout3);
317 callbackAfterConfirmation();
318 }
319 break;
320 // Opponent stopped game (draw, abort, resign...)
321 case "gameover":
322 toggleVisible("gameStopped");
323 localStorage.removeItem("gid");
324 break;
325 // Opponent cancelled rematch:
326 case "closerematch":
327 toggleVisible("newGame");
328 break;
329 }
330 };
331
332 const handleError = (err) => {
333 if (err.code === 'ECONNREFUSED') {
334 removeAllListeners();
335 alert("Server refused connection. Please reload page later");
336 }
337 socket.close();
338 };
339
340 const handleClose = () => {
341 setTimeout(() => {
342 removeAllListeners();
343 connectToWSS();
344 }, autoReconnectDelay());
345 };
346
347 const removeAllListeners = () => {
348 socket.removeEventListener("open", tryResumeGame);
349 socket.removeEventListener("message", messageCenter);
350 socket.removeEventListener("error", handleError);
351 socket.removeEventListener("close", handleClose);
352 };
353
354 const connectToWSS = () => {
355 socket =
356 new WebSocket(`${Params.socket_server}${Params.socket_path}?sid=${sid}`);
357 socket.addEventListener("open", tryResumeGame);
358 socket.addEventListener("message", messageCenter);
359 socket.addEventListener("error", handleError);
360 socket.addEventListener("close", handleClose);
361 attempt++;
362 };
363 connectToWSS();
364
365 const send = (code, data) => {
366 socket.send(JSON.stringify(Object.assign({code: code}, data)));
367 };
368
369 ///////////
370 // Playing
371
372 function toggleTurnIndicator(myTurn) {
373 let indicator = $.getElementById("chessboard");
374 if (myTurn) indicator.style.outline = "thick solid green";
375 else indicator.style.outline = "thick solid lightgrey";
376 }
377
378 function notifyMe(code) {
379 const doNotify = () => {
380 // NOTE: empty body (TODO?)
381 new Notification("New " + code, { vibrate: [200, 100, 200] });
382 new Audio("/assets/new_" + code + ".mp3").play();
383 }
384 if (Notification.permission === 'granted') doNotify();
385 else if (Notification.permission !== 'denied') {
386 Notification.requestPermission().then(permission => {
387 if (permission === 'granted') doNotify();
388 });
389 }
390 }
391
392 let curMoves = [],
393 lastFen, lastMove,
394 timeout1, timeout2, timeout3;
395 const callbackAfterConfirmation = () => {
396 const result = vr.getCurrentScore(lastMove);
397 if (result != "*") {
398 setTimeout( () => {
399 toggleVisible("gameStopped");
400 send("gameover", { gid: gid });
401 }, 2000);
402 }
403 };
404 const afterPlay = (move) => {
405 // Pack into one moves array, then send
406 curMoves.push({
407 appear: move.appear,
408 vanish: move.vanish,
409 start: move.start,
410 end: move.end
411 });
412 lastMove = move;
413 if (vr.turn != playerColor) {
414 toggleTurnIndicator(false);
415 lastFen = vr.getFen();
416 const sendMove =
417 () => send("newmove", {gid: gid, moves: curMoves, fen: lastFen});
418 // Send move until we obtain confirmation or timeout, then callback
419 sendMove();
420 timeout1 = setTimeout(sendMove, 500);
421 timeout2 = setTimeout(sendMove, 1500);
422 timeout3 = setTimeout(
423 () => alert("The move may be lost :( Please reload"),
424 3000);
425 }
426 };
427
428 // Avoid loading twice the same stylesheet:
429 const conditionalLoadCSS = (vname) => {
430 const allIds = [].slice.call($.styleSheets).map(s => s.id);
431 const newId = vname + "_css";
432 if (!allIds.includes(newId)) {
433 $.getElementsByTagName("head")[0].insertAdjacentHTML(
434 "beforeend",
435 `<link id="${newId}" rel="stylesheet"
436 href="/variants/${vname}/style.css"/>`);
437 }
438 };
439
440 let vr, playerColor;
441 function initializeGame(obj) {
442 const options = obj.options || {};
443 import(`/variants/${obj.vname}/class.js`).then(module => {
444 window.V = module.default;
445 conditionalLoadCSS(obj.vname);
446 playerColor = (sid == obj.players[0].sid ? "w" : "b");
447 // Init + remove potential extra DOM elements from a previous game:
448 document.getElementById("boardContainer").innerHTML = `
449 <div id="upLeftInfos"
450 onClick="toggleGameInfos()">
451 <svg version="1.1"
452 viewBox="0.5 0.5 100 100">
453 <g>
454 <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"/>
455 </g>
456 </svg>
457 </div>
458 <div id="upRightStop"
459 onClick="confirmStopGame()">
460 <svg version="1.1"
461 viewBox="0 0 533.333 533.333">
462 <g>
463 <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"/>
464 </g>
465 </svg>
466 </div>
467 <div class="resizeable" id="chessboard"></div>`;
468 vr = new V({
469 seed: obj.seed, //may be null if FEN already exists (running game)
470 fen: obj.fen,
471 element: "chessboard",
472 color: playerColor,
473 afterPlay: afterPlay,
474 options: options
475 });
476 if (!obj.fen) {
477 // Game creation
478 if (playerColor == "w") send("setfen", {gid: obj.gid, fen: vr.getFen()});
479 localStorage.setItem("gid", obj.gid);
480 }
481 const select = $.getElementById("selectVariant");
482 obj.vdisp = "";
483 for (let i=0; i<select.options.length; i++) {
484 if (select.options[i].value == obj.vname) {
485 obj.vdisp = select.options[i].text;
486 break;
487 }
488 }
489 fillGameInfos(obj, playerColor == "w" ? 1 : 0);
490 if (obj.randvar) toggleVisible("gameInfos");
491 else toggleVisible("boardContainer");
492 toggleTurnIndicator(vr.turn == playerColor);
493 });
494 }
495
496 function confirmStopGame() {
497 if (confirm("Stop game?")) {
498 send("gameover", { gid: gid, relay: true });
499 localStorage.removeItem("gid");
500 toggleVisible("gameStopped");
501 }
502 }
503
504 function toggleGameInfos() {
505 if ($.getElementById("gameInfos").style.display == "none")
506 toggleVisible("gameInfos");
507 else {
508 toggleVisible("boardContainer");
509 // Quickfix for the "vanished piece" bug (move played while on game infos)
510 vr.setupPieces(); //TODO: understand better
511 }
512 }
513
514 $.body.addEventListener("keydown", (e) => {
515 if (!localStorage.getItem("gid")) return;
516 if (e.keyCode == 27) confirmStopGame();
517 else if (e.keyCode == 32) {
518 e.preventDefault();
519 toggleGameInfos();
520 }
521 });