1 const url
= require('url');
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 "/?"
8 query
.split("&").forEach((part
) => {
9 const item
= part
.split("=");
10 result
[item
[0]] = decodeURIComponent(item
[1]);
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
));
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
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;
38 clients
[page
][k
][x
].socket
,
39 Object
.assign({ code: code
, from: sid
}, obj
)
44 // For focus events: no need to target self
45 const notifyAllButMe
= (page
,code
,obj
={}) => {
46 if (!clients
[page
]) return;
47 Object
.keys(clients
[page
]).forEach(k
=> {
49 Object
.keys(clients
[page
][k
]).forEach(x
=> {
51 clients
[page
][k
][x
].socket
,
52 Object
.assign({ code: code
, from: sid
}, obj
)
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)
68 const doDisconnect
= () => {
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
});
77 const messageListener
= (objtxt
) => {
78 let obj
= JSON
.parse(objtxt
);
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.
84 notifyRoom(page
, "connect");
85 if (page
.indexOf("/game/") >= 0)
86 notifyRoom("/", "gconnect", { page:page
});
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" });
99 delete clients
[pg
][obj
.sid
];
101 const disconnectFromOtherConnexion
= (pg
,code
,o
={}) => {
102 Object
.keys(clients
[pg
]).forEach(k
=> {
104 Object
.keys(clients
[pg
][k
]).forEach(x
=> {
106 clients
[pg
][k
][x
].socket
,
107 Object
.assign({ code: code
, from: obj
.sid
}, o
)
113 Object
.keys(clients
).forEach(pg
=> {
114 if (clients
[pg
][obj
.sid
]) {
116 disconnectFromOtherConnexion(pg
, "disconnect");
117 if (pg
.indexOf("/game/") >= 0 && clients
["/"])
118 disconnectFromOtherConnexion("/", "gdisconnect", { page: pg
});
123 case "pollclients": {
126 Object
.keys(clients
[page
]).forEach(k
=> {
127 // Avoid polling myself: no new information to get
128 if (k
!= sid
) sockIds
.push(k
);
130 send(socket
, { code: "pollclients", sockIds: sockIds
});
133 case "pollclientsandgamers": {
136 Object
.keys(clients
["/"]).forEach(k
=> {
137 // Avoid polling myself: no new information to get
138 if (k
!= sid
) sockIds
.push({sid:k
});
140 // NOTE: a "gamer" could also just be an observer
141 Object
.keys(clients
).forEach(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
});
149 send(socket
, { code: "pollclientsandgamers", sockIds: sockIds
});
153 // Asking something: from is fully identified,
154 // but the requested resource can be from any tmpId (except current!)
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
) {
166 const idx_myTmpid
= tmpIds
.findIndex(x
=> x
== tmpId
);
167 if (idx_myTmpid
>= 0) tmpIds
.splice(idx_myTmpid
, 1);
169 const tmpId_idx
= Math
.floor(Math
.random() * tmpIds
.length
);
171 clients
[pg
][obj
.target
][tmpIds
[tmpId_idx
]].socket
,
172 { code: obj
.code
, from: [sid
,tmpId
,page
] }
178 // Some Hall events: target all tmpId's (except mine),
179 case "refusechallenge":
181 Object
.keys(clients
[page
][obj
.target
]).forEach(x
=> {
182 if (obj
.target
!= sid
|| x
!= tmpId
)
184 clients
[page
][obj
.target
][x
].socket
,
185 { code: obj
.code
, data: obj
.data
}
190 // Notify all room: mostly game events
194 case "deletechallenge":
199 notifyRoom(page
, obj
.code
, {data: obj
.data
});
203 const dataWithFrom
= { from: [sid
,tmpId
], data: obj
.data
};
204 // Special case re-send newmove only to opponent:
205 if (!!obj
.target
&& !!clients
[page
][obj
.target
]) {
206 Object
.keys(clients
[page
][obj
.target
]).forEach(x
=> {
208 clients
[page
][obj
.target
][x
].socket
,
209 Object
.assign({ code: "newmove" }, dataWithFrom
)
213 // NOTE: data.from is useful only to opponent
214 notifyRoom(page
, "newmove", dataWithFrom
);
220 !!clients
[page
][obj
.target
[0]] &&
221 !!clients
[page
][obj
.target
[0]][obj
.target
[1]]
224 clients
[page
][obj
.target
[0]][obj
.target
[1]].socket
,
231 // Special case: notify all, 'transroom': Game --> Hall
232 notifyRoom("/", "result", { gid: obj
.gid
, score: obj
.score
});
236 // Special case: notify some game rooms that
237 // I'm watching game state from MyGames
238 // TODO: this code is ignored for now
239 obj
.gids
.forEach(gid
=> {
240 const pg
= "/game/" + gid
;
241 Object
.keys(clients
[pg
]).forEach(s
=> {
242 Object
.keys(clients
[pg
][s
]).forEach(x
=> {
244 clients
[pg
][s
][x
].socket
,
245 { code: "mconnect", from: sid
}
253 // Also TODO: pass newgame to MyGames, and gameover (result)
256 const gamePg
= "/game/" + obj
.gid
;
257 if (!!clients
[gamePg
] && !!clients
[gamePg
][obj
.target
]) {
258 Object
.keys(clients
[gamePg
][obj
.target
]).forEach(x
=> {
260 clients
[gamePg
][obj
.target
][x
].socket
,
270 if (page
== "/") notifyAllButMe("/", obj
.code
, { page: "/" });
272 // Notify game room + Hall:
273 notifyAllButMe(page
, obj
.code
);
274 notifyAllButMe("/", obj
.code
, { page: page
});
278 // Passing, relaying something: from isn't needed,
279 // but target is fully identified (sid + tmpId)
286 const pg
= obj
.target
[2] || page
; //required for identity and game
287 // NOTE: if in game we ask identity to opponent still in Hall,
288 // but leaving Hall, clients[pg] or clients[pg][target] could be undefined
289 if (!!clients
[pg
] && !!clients
[pg
][obj
.target
[0]]) {
291 clients
[pg
][obj
.target
[0]][obj
.target
[1]].socket
,
292 { code:obj
.code
, data:obj
.data
}
299 const closeListener
= () => {
300 // For browser or tab closing (including page reload):
303 // Update clients object: add new connexion
304 const newElt
= { socket: socket
, focus: true };
306 clients
[page
] = { [sid
]: {[tmpId
]: newElt
} };
307 else if (!clients
[page
][sid
])
308 clients
[page
][sid
] = { [tmpId
]: newElt
};
310 clients
[page
][sid
][tmpId
] = newElt
;
311 socket
.on("message", messageListener
);
312 socket
.on("close", closeListener
);