| 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 | { |
| 7 | const query = url.substr(2); //starts with "/?" |
| 8 | let result = {}; |
| 9 | query.split("&").forEach((part) => { |
| 10 | const item = part.split("="); |
| 11 | result[item[0]] = decodeURIComponent(item[1]); |
| 12 | }); |
| 13 | return result; |
| 14 | } |
| 15 | |
| 16 | module.exports = function(wss) { |
| 17 | let clients = {}; //associative array sid --> socket |
| 18 | wss.on("connection", (socket, req) => { |
| 19 | const query = getJsonFromUrl(req.url); |
| 20 | if (query["page"] != "/" && query["page"].indexOf("/game/") < 0) |
| 21 | return; //other tabs don't need to be connected |
| 22 | const sid = query["sid"]; |
| 23 | const notifyRoom = (page,code,obj={},excluded=[]) => { |
| 24 | Object.keys(clients).forEach(k => { |
| 25 | if (k in excluded) |
| 26 | return; |
| 27 | if (k != sid && clients[k].page == page) |
| 28 | { |
| 29 | clients[k].sock.send(JSON.stringify(Object.assign( |
| 30 | {code:code, from:sid}, obj))); |
| 31 | } |
| 32 | }); |
| 33 | }; |
| 34 | const messageListener = (objtxt) => { |
| 35 | let obj = JSON.parse(objtxt); |
| 36 | if (!!obj.target && !clients[obj.target]) |
| 37 | return; //receiver not connected, nothing we can do |
| 38 | switch (obj.code) |
| 39 | { |
| 40 | case "duplicate": |
| 41 | // Turn off message listening, and send disconnect if needed: |
| 42 | socket.removeListener("message", messageListener); |
| 43 | socket.removeListener("close", closeListener); |
| 44 | // From obj.page to clients[sid].page (TODO: unclear) |
| 45 | if (clients[sid].page != obj.page) |
| 46 | { |
| 47 | notifyRoom(obj.page, "disconnect"); |
| 48 | if (obj.page.indexOf("/game/") >= 0) |
| 49 | notifyRoom("/", "gdisconnect"); |
| 50 | } |
| 51 | break; |
| 52 | // Wait for "connect" message to notify connection to the room, |
| 53 | // because if game loading is slow the message listener might |
| 54 | // not be ready too early. |
| 55 | case "connect": |
| 56 | { |
| 57 | const curPage = clients[sid].page; |
| 58 | notifyRoom(curPage, "connect"); //Hall or Game |
| 59 | if (curPage.indexOf("/game/") >= 0) |
| 60 | notifyRoom("/", "gconnect"); //notify main hall |
| 61 | break; |
| 62 | } |
| 63 | case "pollclients": |
| 64 | { |
| 65 | const curPage = clients[sid].page; |
| 66 | socket.send(JSON.stringify({code:"pollclients", |
| 67 | sockIds: Object.keys(clients).filter(k => |
| 68 | k != sid && clients[k].page == curPage |
| 69 | )})); |
| 70 | break; |
| 71 | } |
| 72 | case "pollgamers": |
| 73 | socket.send(JSON.stringify({code:"pollgamers", |
| 74 | sockIds: Object.keys(clients).filter(k => |
| 75 | k != sid && clients[k].page.indexOf("/game/") >= 0 |
| 76 | )})); |
| 77 | break; |
| 78 | case "pagechange": |
| 79 | // page change clients[sid].page --> obj.page |
| 80 | // TODO: some offline rooms don't need to receive disconnect event |
| 81 | notifyRoom(clients[sid].page, "disconnect"); |
| 82 | if (clients[sid].page.indexOf("/game/") >= 0) |
| 83 | notifyRoom("/", "gdisconnect"); |
| 84 | clients[sid].page = obj.page; |
| 85 | // No need to notify connection: it's self-sent in .vue file |
| 86 | //notifyRoom(obj.page, "connect"); |
| 87 | if (obj.page.indexOf("/game/") >= 0) |
| 88 | notifyRoom("/", "gconnect"); |
| 89 | break; |
| 90 | case "askidentity": |
| 91 | clients[obj.target].sock.send(JSON.stringify( |
| 92 | {code:"askidentity",from:sid})); |
| 93 | break; |
| 94 | case "asklastate": |
| 95 | clients[obj.target].sock.send(JSON.stringify( |
| 96 | {code:"asklastate",from:sid})); |
| 97 | break; |
| 98 | case "askchallenge": |
| 99 | clients[obj.target].sock.send(JSON.stringify( |
| 100 | {code:"askchallenge",from:sid})); |
| 101 | break; |
| 102 | case "askgames": |
| 103 | { |
| 104 | // Check all clients playing, and send them a "askgame" message |
| 105 | let gameSids = {}; //game ID --> [sid1, sid2] |
| 106 | const regexpGid = /\/[a-zA-Z0-9]+$/; |
| 107 | Object.keys(clients).forEach(k => { |
| 108 | if (k != sid && clients[k].page.indexOf("/game/") >= 0) |
| 109 | { |
| 110 | const gid = clients[k].page.match(regexpGid)[0]; |
| 111 | if (!gameSids[gid]) |
| 112 | gameSids[gid] = [k]; |
| 113 | else |
| 114 | gameSids[gid].push(k); |
| 115 | } |
| 116 | }); |
| 117 | // Request only one client out of 2 (TODO: this is a bit heavy) |
| 118 | // Alt: ask game to all, and filter later? |
| 119 | Object.keys(gameSids).forEach(gid => { |
| 120 | const L = gameSids[gid].length; |
| 121 | const idx = L > 1 |
| 122 | ? Math.floor(Math.random() * Math.floor(L)) |
| 123 | : 0; |
| 124 | const rid = gameSids[gid][idx]; |
| 125 | clients[rid].sock.send(JSON.stringify( |
| 126 | {code:"askgame", from: sid})); |
| 127 | }); |
| 128 | break; |
| 129 | } |
| 130 | case "askgame": |
| 131 | clients[obj.target].sock.send(JSON.stringify( |
| 132 | {code:"askgame", from:sid})); |
| 133 | break; |
| 134 | case "askfullgame": |
| 135 | clients[obj.target].sock.send(JSON.stringify( |
| 136 | {code:"askfullgame", from:sid})); |
| 137 | break; |
| 138 | case "fullgame": |
| 139 | clients[obj.target].sock.send(JSON.stringify( |
| 140 | {code:"fullgame", game:obj.game})); |
| 141 | break; |
| 142 | case "identity": |
| 143 | clients[obj.target].sock.send(JSON.stringify( |
| 144 | {code:"identity",user:obj.user})); |
| 145 | break; |
| 146 | case "refusechallenge": |
| 147 | clients[obj.target].sock.send(JSON.stringify( |
| 148 | {code:"refusechallenge", cid:obj.cid, from:sid})); |
| 149 | break; |
| 150 | case "deletechallenge": |
| 151 | clients[obj.target].sock.send(JSON.stringify( |
| 152 | {code:"deletechallenge", cid:obj.cid, from:sid})); |
| 153 | break; |
| 154 | case "newgame": |
| 155 | clients[obj.target].sock.send(JSON.stringify( |
| 156 | {code:"newgame", gameInfo:obj.gameInfo, cid:obj.cid})); |
| 157 | break; |
| 158 | case "challenge": |
| 159 | clients[obj.target].sock.send(JSON.stringify( |
| 160 | {code:"challenge", chall:obj.chall, from:sid})); |
| 161 | break; |
| 162 | case "game": |
| 163 | if (!!obj.target) |
| 164 | { |
| 165 | clients[obj.target].sock.send(JSON.stringify( |
| 166 | {code:"game", game:obj.game, from:sid})); |
| 167 | } |
| 168 | else |
| 169 | { |
| 170 | // Notify all room except opponent and me: |
| 171 | notifyRoom("/", "game", {game:obj.game}, [obj.oppsid]); |
| 172 | } |
| 173 | break; |
| 174 | case "newchat": |
| 175 | notifyRoom(clients[sid].page, "newchat", {chat:obj.chat}); |
| 176 | break; |
| 177 | // TODO: WebRTC instead in this case (most demanding?) |
| 178 | // --> Or else: at least do a "notifyRoom" (also for draw, resign...) |
| 179 | case "newmove": |
| 180 | clients[obj.target].sock.send(JSON.stringify( |
| 181 | {code:"newmove", move:obj.move})); |
| 182 | break; |
| 183 | case "lastate": |
| 184 | clients[obj.target].sock.send(JSON.stringify( |
| 185 | {code:"lastate", state:obj.state})); |
| 186 | break; |
| 187 | case "resign": |
| 188 | clients[obj.target].sock.send(JSON.stringify( |
| 189 | {code:"resign", side:obj.side})); |
| 190 | break; |
| 191 | case "abort": |
| 192 | clients[obj.target].sock.send(JSON.stringify( |
| 193 | {code:"abort"})); |
| 194 | break; |
| 195 | case "drawoffer": |
| 196 | clients[obj.target].sock.send(JSON.stringify( |
| 197 | {code:"drawoffer"})); |
| 198 | break; |
| 199 | case "draw": |
| 200 | clients[obj.target].sock.send(JSON.stringify( |
| 201 | {code:"draw", message:obj.message})); |
| 202 | break; |
| 203 | } |
| 204 | }; |
| 205 | const closeListener = () => { |
| 206 | const page = clients[sid].page; |
| 207 | delete clients[sid]; |
| 208 | notifyRoom(page, "disconnect"); |
| 209 | if (page.indexOf("/game/") >= 0) |
| 210 | notifyRoom("/", "gdisconnect"); //notify main hall |
| 211 | }; |
| 212 | if (!!clients[sid]) |
| 213 | { |
| 214 | // Turn off old sock through current client: |
| 215 | clients[sid].sock.send(JSON.stringify({code:"duplicate"})); |
| 216 | } |
| 217 | // Potentially replace current connection: |
| 218 | clients[sid] = {sock: socket, page: query["page"]}; |
| 219 | socket.on("message", messageListener); |
| 220 | socket.on("close", closeListener); |
| 221 | }); |
| 222 | } |