Restore newgame.flac - part 1
[vchess.git] / server / sockets.js
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a29d9d6b 1const url = require('url');
1d184b4c 2
2807f530 3// Node version in Ubuntu 16.04 does not know about URL class
a0c41e7e 4// NOTE: url is already transformed, without ?xxx=yyy... parts
1611a25f 5function getJsonFromUrl(url) {
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6 const query = url.substr(2); //starts with "/?"
7 let result = {};
8 query.split("&").forEach((part) => {
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9 const item = part.split("=");
10 result[item[0]] = decodeURIComponent(item[1]);
11 });
12 return result;
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13}
14
8b152ada 15// Helper to safe-send some message through a (web-)socket:
1611a25f 16function send(socket, message) {
f9c36b2d 17 if (!!socket && socket.readyState == 1)
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18 socket.send(JSON.stringify(message));
19}
20
1d184b4c 21module.exports = function(wss) {
71468011 22 // Associative array page --> sid --> tmpId --> socket
8418f0d7 23 // "page" is either "/" for hall or "/game/some_gid" for Game,
a041d5d8 24 // or "/mygames" for Mygames page (simpler: no 'people' array).
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25 // tmpId is required if a same user (browser) has different tabs
26 let clients = {};
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27 let sidToPages = {};
28 let idToSid = {};
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29 wss.on("connection", (socket, req) => {
30 const query = getJsonFromUrl(req.url);
31 const sid = query["sid"];
cafe0166 32 const id = query["id"];
8418f0d7 33 const tmpId = query["tmpId"];
71468011 34 const page = query["page"];
f14572c4 35 const notifyRoom = (page, code, obj={}, except) => {
a041d5d8 36 if (!clients[page]) return;
f14572c4 37 except = except || [];
a041d5d8 38 Object.keys(clients[page]).forEach(k => {
856f995c 39 if (except.includes(k)) return;
a041d5d8 40 Object.keys(clients[page][k]).forEach(x => {
f14572c4 41 if (k == sid && x == tmpId) return;
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42 send(
43 clients[page][k][x].socket,
aae89b49 44 Object.assign({ code: code, from: sid }, obj)
1611a25f 45 );
71468011 46 });
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47 });
48 };
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49 const deleteConnexion = () => {
50 if (!clients[page] || !clients[page][sid] || !clients[page][sid][tmpId])
51 return; //job already done
52 delete clients[page][sid][tmpId];
1611a25f 53 if (Object.keys(clients[page][sid]).length == 0) {
71468011 54 delete clients[page][sid];
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55 const pgIndex = sidToPages[sid].findIndex(pg => pg == page);
56 sidToPages[sid].splice(pgIndex, 1);
1611a25f 57 if (Object.keys(clients[page]).length == 0)
71468011 58 delete clients[page];
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59 // Am I totally offline?
60 if (sidToPages[sid].length == 0) {
61 delete sidToPages[sid];
62 delete idToSid[id];
63 }
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64 }
65 };
1611a25f 66
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67 const doDisconnect = () => {
68 deleteConnexion();
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69 // Nothing to notify when disconnecting from MyGames page:
70 if (page != "/mygames" && (!clients[page] || !clients[page][sid])) {
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71 // I effectively disconnected from this page:
72 notifyRoom(page, "disconnect");
73 if (page.indexOf("/game/") >= 0)
aae89b49 74 notifyRoom("/", "gdisconnect", { page:page });
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75 }
76 };
a3ac374b 77 const messageListener = (objtxt) => {
5bd05dba 78 let obj = JSON.parse(objtxt);
1611a25f 79 switch (obj.code) {
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80 // Wait for "connect" message to notify connection to the room,
81 // because if game loading is slow the message listener might
82 // not be ready too early.
1611a25f 83 case "connect": {
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84 notifyRoom(page, "connect");
85 if (page.indexOf("/game/") >= 0)
aae89b49 86 notifyRoom("/", "gconnect", { page:page });
41c80bb6 87 break;
120fe373 88 }
8418f0d7 89 case "disconnect":
71468011 90 // When page changes:
f5f51daf 91 doDisconnect();
8418f0d7 92 break;
1611a25f 93 case "killme": {
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94 // Self multi-connect: manual removal + disconnect
95 const doKill = (pg) => {
96 Object.keys(clients[pg][obj.sid]).forEach(x => {
a041d5d8 97 send(clients[pg][obj.sid][x].socket, { code: "killed" });
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98 });
99 delete clients[pg][obj.sid];
100 };
101 const disconnectFromOtherConnexion = (pg,code,o={}) => {
102 Object.keys(clients[pg]).forEach(k => {
1611a25f 103 if (k != obj.sid) {
51d87b52 104 Object.keys(clients[pg][k]).forEach(x => {
1611a25f 105 send(
a041d5d8 106 clients[pg][k][x].socket,
aae89b49 107 Object.assign({ code: code, from: obj.sid }, o)
1611a25f 108 );
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109 });
110 }
111 });
112 };
113 Object.keys(clients).forEach(pg => {
1611a25f 114 if (clients[pg][obj.sid]) {
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115 doKill(pg);
116 disconnectFromOtherConnexion(pg, "disconnect");
1611a25f 117 if (pg.indexOf("/game/") >= 0 && clients["/"])
aae89b49 118 disconnectFromOtherConnexion("/", "gdisconnect", { page: pg });
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119 }
120 });
121 break;
122 }
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123 case "pollclients": {
124 // From Hall or Game
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125 let sockIds = [];
126 Object.keys(clients[page]).forEach(k => {
51d87b52 127 // Avoid polling myself: no new information to get
1611a25f 128 if (k != sid) sockIds.push(k);
8418f0d7 129 });
aae89b49 130 send(socket, { code: "pollclients", sockIds: sockIds });
92a523d1 131 break;
ac8f441c 132 }
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133 case "pollclientsandgamers": {
134 // From Hall
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135 let sockIds = [];
136 Object.keys(clients["/"]).forEach(k => {
51d87b52 137 // Avoid polling myself: no new information to get
1611a25f 138 if (k != sid) sockIds.push({sid:k});
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139 });
140 // NOTE: a "gamer" could also just be an observer
141 Object.keys(clients).forEach(p => {
cafe0166 142 if (p.indexOf("/game/") >= 0) {
71468011 143 Object.keys(clients[p]).forEach(k => {
1611a25f 144 // 'page' indicator is needed for gamers
aae89b49 145 if (k != sid) sockIds.push({ sid:k, page:p });
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146 });
147 }
8418f0d7 148 });
aae89b49 149 send(socket, { code: "pollclientsandgamers", sockIds: sockIds });
5a3da968 150 break;
8418f0d7 151 }
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152
153 // Asking something: from is fully identified,
154 // but the requested resource can be from any tmpId (except current!)
5a3da968 155 case "askidentity":
71468011 156 case "asklastate":
28b32b4f 157 case "askchallenges":
71468011 158 case "askgame":
1611a25f 159 case "askfullgame": {
8b152ada 160 const pg = obj.page || page; //required for askidentity and askgame
910d631b 161 // In cas askfullgame to wrong SID for example, would crash:
f9c36b2d 162 if (!!clients[pg] && !!clients[pg][obj.target]) {
910d631b 163 const tmpIds = Object.keys(clients[pg][obj.target]);
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164 if (obj.target == sid) {
165 // Targetting myself
910d631b 166 const idx_myTmpid = tmpIds.findIndex(x => x == tmpId);
1611a25f 167 if (idx_myTmpid >= 0) tmpIds.splice(idx_myTmpid, 1);
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168 }
169 const tmpId_idx = Math.floor(Math.random() * tmpIds.length);
170 send(
a041d5d8 171 clients[pg][obj.target][tmpIds[tmpId_idx]].socket,
aae89b49 172 { code: obj.code, from: [sid,tmpId,page] }
910d631b 173 );
71468011 174 }
81d9ce72 175 break;
8418f0d7 176 }
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177
178 // Some Hall events: target all tmpId's (except mine),
179 case "refusechallenge":
180 case "startgame":
181 Object.keys(clients[page][obj.target]).forEach(x => {
182 if (obj.target != sid || x != tmpId)
1611a25f 183 send(
a041d5d8 184 clients[page][obj.target][x].socket,
aae89b49 185 { code: obj.code, data: obj.data }
1611a25f 186 );
c6788ecf 187 });
4d64881e 188 break;
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189
190 // Notify all room: mostly game events
5bd05dba 191 case "newchat":
71468011 192 case "newchallenge":
28b32b4f 193 case "deletechallenge_s":
c292ebb2 194 case "newgame":
5bd05dba 195 case "resign":
b988c726 196 case "abort":
2cc10cdb 197 case "drawoffer":
c292ebb2 198 case "rematchoffer":
2cc10cdb 199 case "draw":
f14572c4 200 notifyRoom(page, obj.code, {data: obj.data}, obj.excluded);
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201 break;
202
203 case "rnewgame":
585d0955 204 // A rematch game started:
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205 notifyRoom(page, "newgame", {data: obj.data});
206 // Explicitely notify Hall if gametype == corr.
207 // Live games will be polled from Hall after gconnect event.
208 if (obj.data.cadence.indexOf('d') >= 0)
209 notifyRoom("/", "newgame", {data: obj.data});
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210 break;
211
212 case "newmove": {
aae89b49 213 const dataWithFrom = { from: [sid,tmpId], data: obj.data };
f9c36b2d 214 // Special case re-send newmove only to opponent:
e5c1d0fb 215 if (!!obj.target && !!clients[page][obj.target]) {
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216 Object.keys(clients[page][obj.target]).forEach(x => {
217 send(
a041d5d8 218 clients[page][obj.target][x].socket,
aae89b49 219 Object.assign({ code: "newmove" }, dataWithFrom)
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220 );
221 });
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222 } else {
223 // NOTE: data.from is useful only to opponent
224 notifyRoom(page, "newmove", dataWithFrom);
f9c36b2d 225 }
f9c36b2d 226 break;
e5c1d0fb 227 }
f9c36b2d 228 case "gotmove":
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229 if (
230 !!clients[page][obj.target[0]] &&
231 !!clients[page][obj.target[0]][obj.target[1]]
232 ) {
233 send(
a041d5d8 234 clients[page][obj.target[0]][obj.target[1]].socket,
e01e086d 235 { code: "gotmove" }
e5c1d0fb 236 );
f9c36b2d 237 }
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238 break;
239
48ab808f
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240 case "result":
241 // Special case: notify all, 'transroom': Game --> Hall
aae89b49 242 notifyRoom("/", "result", { gid: obj.gid, score: obj.score });
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BA
243 break;
244
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BA
245 case "mabort": {
246 const gamePg = "/game/" + obj.gid;
247 if (!!clients[gamePg] && !!clients[gamePg][obj.target]) {
3b0f26c1 248 Object.keys(clients[gamePg][obj.target]).forEach(x => {
aae89b49 249 send(
a041d5d8 250 clients[gamePg][obj.target][x].socket,
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251 { code: "abort" }
252 );
253 });
254 }
255 break;
256 }
48ab808f 257
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258 case "notifyscore":
259 case "notifyturn":
260 case "notifynewgame":
261 if (!!clients["/mygames"]) {
262 obj.targets.forEach(t => {
0234201f 263 const k = t.sid || idToSid[t.id];
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264 if (!!clients["/mygames"][k]) {
265 Object.keys(clients["/mygames"][k]).forEach(x => {
266 send(
267 clients["/mygames"][k][x].socket,
268 { code: obj.code, data: obj.data }
269 );
270 });
271 }
272 });
273 }
274 break;
275
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BA
276 case "getfocus":
277 case "losefocus":
f14572c4 278 if (page == "/") notifyRoom("/", obj.code, { page: "/" }, [sid]);
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279 else {
280 // Notify game room + Hall:
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281 notifyRoom(page, obj.code, {}, [sid]);
282 notifyRoom("/", obj.code, { page: page }, [sid]);
a041d5d8
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283 }
284 break;
285
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286 // Passing, relaying something: from isn't needed,
287 // but target is fully identified (sid + tmpId)
28b32b4f 288 case "challenges":
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289 case "fullgame":
290 case "game":
291 case "identity":
292 case "lastate":
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293 {
294 const pg = obj.target[2] || page; //required for identity and game
8477e53d 295 // NOTE: if in game we ask identity to opponent still in Hall,
f9c36b2d 296 // but leaving Hall, clients[pg] or clients[pg][target] could be undefined
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297 if (!!clients[pg] && !!clients[pg][obj.target[0]]) {
298 send(
a041d5d8 299 clients[pg][obj.target[0]][obj.target[1]].socket,
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300 { code:obj.code, data:obj.data }
301 );
302 }
2cc10cdb 303 break;
8b152ada 304 }
5bd05dba 305 }
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306 };
307 const closeListener = () => {
092de306 308 // For browser or tab closing (including page reload):
f5f51daf 309 doDisconnect();
a3ac374b 310 };
71468011 311 // Update clients object: add new connexion
a041d5d8 312 const newElt = { socket: socket, focus: true };
71468011 313 if (!clients[page])
a041d5d8 314 clients[page] = { [sid]: {[tmpId]: newElt } };
71468011 315 else if (!clients[page][sid])
a041d5d8 316 clients[page][sid] = { [tmpId]: newElt };
71468011 317 else
a041d5d8 318 clients[page][sid][tmpId] = newElt;
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319 // Also update helper correspondances
320 if (!idToSid[id]) idToSid[id] = sid;
321 if (!sidToPages[sid]) sidToPages[sid] = [];
322 const pgIndex = sidToPages[sid].findIndex(pg => pg == page);
323 if (pgIndex === -1) sidToPages[sid].push(page);
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324 socket.on("message", messageListener);
325 socket.on("close", closeListener);
5bd05dba 326 });
1d184b4c 327}