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[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
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4function getJsonFromUrl(url)
5{
6 const query = url.substr(2); //starts with "/?"
7 let result = {};
8 query.split("&").forEach((part) => {
9 const item = part.split("=");
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10 result[item[0]] = decodeURIComponent(item[1]);
11 });
12 return result;
13}
14
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15// Removal in array of strings (socket IDs)
16function remInArray(arr, item)
17{
18 const idx = arr.indexOf(item);
19 if (idx >= 0)
20 arr.splice(idx, 1);
21}
22
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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
b644ef7f 25// TODO: this file "in the end" would be much simpler, essentially just tracking connect/disconnect
4608eed9 26// (everything else using WebRTC)
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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
4608eed9 30
1d184b4c 31module.exports = function(wss) {
4d64881e 32 let clients = {}; //associative array sid --> socket
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33 wss.on("connection", (socket, req) => {
34 const query = getJsonFromUrl(req.url);
35 const sid = query["sid"];
052d17ea 36 // Ignore duplicate connections (on the same live game that we play):
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37 if (!!clients[sid])
38 return socket.send(JSON.stringify({code:"duplicate"}));
b4d619d1 39 clients[sid] = socket;
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40 // Notify room:
41 Object.keys(clients).forEach(k => {
42 if (k != sid)
43 clients[k].send(JSON.stringify({code:"connect",sid:sid}));
44 });
45 socket.on("message", objtxt => {
b4d619d1 46 let obj = JSON.parse(objtxt);
5a3da968 47 if (!!obj.target && !clients[obj.target])
b4d619d1 48 return; //receiver not connected, nothing we can do
5a3da968 49 //console.log(obj.code);
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50 switch (obj.code)
51 {
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52 case "pollclients":
53 socket.send(JSON.stringify({code:"pollclients",
54 sockIds:Object.keys(clients).filter(k => k != sid)}));
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55 break;
56 case "askidentity":
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57 clients[obj.target].send(
58 JSON.stringify({code:"askidentity",from:sid}));
59 break;
dd75774d 60 case "askchallenge":
81d9ce72 61 clients[obj.target].send(
dd75774d 62 JSON.stringify({code:"askchallenge",from:sid}));
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63 break;
64 case "askgame":
65 clients[obj.target].send(
66 JSON.stringify({code:"askgame",from:sid}));
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67 break;
68 case "identity":
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69 clients[obj.target].send(
70 JSON.stringify({code:"identity",user:obj.user}));
4d64881e 71 break;
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72 case "challenge":
73 // Relay challenge to other player
6855163c 74 clients[obj.target].send(
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75 JSON.stringify({code:"challenge", chall:obj.chall, from:sid}));
76 break;
77 case "acceptchallenge":
78 clients[obj.target].send(
79 JSON.stringify({code:"acceptchallenge", cid:obj.cid, from:sid}));
dd75774d 80 break;
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81 case "withdrawchallenge":
82 clients[obj.target].send(
83 JSON.stringify({code:"withdrawchallenge", cid:obj.cid, from:sid}));
84 break;
85 case "newgame":
86 clients[obj.target].send(JSON.stringify(
87 {code:"newgame", gameInfo:obj.gameInfo}));
88 break;
dd75774d 89 case "game":
bb7dd7db 90 // TODO: relay (live) game to other player
4d64881e 91 break;
b4d619d1 92 case "newchat":
5a3da968 93 clients[obj.target].send(JSON.stringify({code:"newchat",msg:obj.msg}));
b4d619d1 94 break;
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95 // Transmit chats and moves to current room
96 // TODO: WebRTC instead in this case (most demanding?)
b4d619d1 97 case "newmove":
5a3da968 98 clients[obj.target].send(JSON.stringify({code:"newmove",move:obj.move}));
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99 break;
100 // TODO: generalize that for several opponents
101 case "ping":
102 socket.send(JSON.stringify({code:"pong",gameId:obj.gameId}));
103 break;
104 case "lastate":
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105 const oppId = obj.target;
106 obj.oppid = sid; //I'm the opponent of my opponent(s)
4d64881e 107 clients[oppId].send(JSON.stringify(obj));
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108 break;
109 // TODO: moreover, here, game info should be sent (through challenge; not stored here)
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110 // TODO: also other challenge events
111 case "resign":
5a3da968 112 clients[obj.target].send(JSON.stringify({code:"resign"}));
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113 break;
114 // TODO: case "challenge" (get ID) --> send to all, "acceptchallenge" (with ID) --> send to all, "cancelchallenge" --> send to all
115 // also, "sendgame" (give current game info, if any) --> to new connections, "sendchallenges" (same for challenges) --> to new connections
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116 }
117 });
118 socket.on("close", () => {
119 delete clients[sid];
120 // Notify every other connected client
121 Object.keys(clients).forEach( k => {
4d64881e 122 clients[k].send(JSON.stringify({code:"disconnect",sid:sid}));
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123 });
124 });
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125 });
126}