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