| 1 | const url = require('url'); |
| 2 | |
| 3 | // Node version in Ubuntu 16.04 does not know about URL class |
| 4 | function getJsonFromUrl(url) |
| 5 | { |
| 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 | // Removal in array of strings (socket IDs) |
| 16 | function remInArray(arr, item) |
| 17 | { |
| 18 | const idx = arr.indexOf(item); |
| 19 | if (idx >= 0) |
| 20 | arr.splice(idx, 1); |
| 21 | } |
| 22 | |
| 23 | // TODO: empêcher multi-log du même user (envoyer le user ID + secret en même temps que name et...) |
| 24 | // --> si secret ne matche pas celui trouvé en DB, stop |
| 25 | // TODO: this file "in the end" would be much simpler, essentially just tracking connect/disconnect |
| 26 | // (everything else using WebRTC) |
| 27 | // TODO: lorsque challenge accepté, seul le dernier joueur à accepter envoi message "please start game" |
| 28 | // avec les coordonnées des participants. Le serveur renvoit alors les détails de la partie (couleurs, position) |
| 29 | //TODO: programmatic re-navigation on current game if we receive a move and are not there |
| 30 | |
| 31 | module.exports = function(wss) { |
| 32 | let clients = {}; //associative array client sid --> socket |
| 33 | // No-op function as a callback when sending messages |
| 34 | const noop = () => { }; |
| 35 | wss.on("connection", (socket, req) => { |
| 36 | const query = getJsonFromUrl(req.url); |
| 37 | const sid = query["sid"]; |
| 38 | // Ignore duplicate connections (on the same live game that we play): |
| 39 | if (!!clients[sid]) |
| 40 | return socket.send(JSON.stringify({code:"duplicate"})); |
| 41 | clients[sid] = socket; |
| 42 | socket.on("message", objtxt => { |
| 43 | let obj = JSON.parse(objtxt); |
| 44 | if (!!obj.oppid && !clients[oppid]) |
| 45 | return; //receiver not connected, nothing we can do |
| 46 | switch (obj.code) |
| 47 | { |
| 48 | // Transmit chats and moves to current room |
| 49 | // TODO: WebRTC instead in this case (most demanding?) |
| 50 | case "newchat": |
| 51 | clients[obj.oppid].send(JSON.stringify({code:"newchat",msg:obj.msg}), noop); |
| 52 | break; |
| 53 | case "newmove": |
| 54 | clients[obj.oppid].send(JSON.stringify({code:"newmove",move:obj.move}), noop); |
| 55 | break; |
| 56 | // TODO: generalize that for several opponents |
| 57 | case "ping": |
| 58 | socket.send(JSON.stringify({code:"pong",gameId:obj.gameId})); |
| 59 | break; |
| 60 | case "lastate": |
| 61 | const oppId = obj.oppid; |
| 62 | obj.oppid = sid; //I'm oppid for my opponent |
| 63 | clients[oppId].send(JSON.stringify(obj), noop); |
| 64 | break; |
| 65 | // TODO: moreover, here, game info should be sent (through challenge; not stored here) |
| 66 | case "newgame": |
| 67 | clients[oppId].send( |
| 68 | JSON.stringify( |
| 69 | {code:"newgame",fen:fen,oppid:sid,color:"w",gameid:"TODO"}), |
| 70 | noop); |
| 71 | break; |
| 72 | case "cancelnewgame": //if a user cancel his seek |
| 73 | // TODO: just transmit event |
| 74 | //delete games[page]; |
| 75 | break; |
| 76 | // TODO: also other challenge events |
| 77 | case "resign": |
| 78 | clients[obj.oppid].send(JSON.stringify({code:"resign"}), noop); |
| 79 | break; |
| 80 | // TODO: case "challenge" (get ID) --> send to all, "acceptchallenge" (with ID) --> send to all, "cancelchallenge" --> send to all |
| 81 | // also, "sendgame" (give current game info, if any) --> to new connections, "sendchallenges" (same for challenges) --> to new connections |
| 82 | case "newchallenge": |
| 83 | console.log("challenge received"); |
| 84 | console.log(obj.sender); |
| 85 | console.log(obj); |
| 86 | break; |
| 87 | } |
| 88 | }); |
| 89 | socket.on("close", () => { |
| 90 | delete clients[sid]; |
| 91 | // Notify every other connected client |
| 92 | Object.keys(clients).forEach( k => { |
| 93 | clients[k].send(JSON.stringify({code:"disconnect",sid:sid}), noop); |
| 94 | }); |
| 95 | }); |
| 96 | }); |
| 97 | } |