const url = require('url');
// Node version in Ubuntu 16.04 does not know about URL class
+// NOTE: url is already transformed, without ?xxx=yyy... parts
function getJsonFromUrl(url)
{
const query = url.substr(2); //starts with "/?"
}
module.exports = function(wss) {
- let clients = {}; //associative array sid --> socket
+ // Associative array page --> sid --> tmpId --> socket
+ // "page" is either "/" for hall or "/game/some_gid" for Game,
+ // tmpId is required if a same user (browser) has different tabs
+ let clients = {};
wss.on("connection", (socket, req) => {
const query = getJsonFromUrl(req.url);
const sid = query["sid"];
- // TODO: later, allow duplicate connections (shouldn't be much more complicated)
- if (!!clients[sid])
- return socket.send(JSON.stringify({code:"duplicate"}));
- clients[sid] = {sock: socket, page: query["page"]};
- const notifyRoom = (page,code,obj={},excluded=[]) => {
- Object.keys(clients).forEach(k => {
- if (k in excluded)
- return;
- if (k != sid && clients[k].page == page)
- {
- clients[k].sock.send(JSON.stringify(Object.assign(
+ const tmpId = query["tmpId"];
+ const page = query["page"];
+ const notifyRoom = (page,code,obj={}) => {
+ if (!clients[page])
+ return;
+ Object.keys(clients[page]).forEach(k => {
+ Object.keys(clients[page][k]).forEach(x => {
+ if (k == sid && x == tmpId)
+ return;
+ clients[page][k][x].send(JSON.stringify(Object.assign(
{code:code, from:sid}, obj)));
- }
+ });
});
};
- notifyRoom(query["page"], "connect"); //Hall or Game
- if (query["page"].indexOf("/game/") >= 0)
- notifyRoom("/", "connect"); //notify main hall
- socket.on("message", objtxt => {
+ const deleteConnexion = () => {
+ if (!clients[page] || !clients[page][sid] || !clients[page][sid][tmpId])
+ return; //job already done
+ delete clients[page][sid][tmpId];
+ if (Object.keys(clients[page][sid]).length == 0)
+ {
+ delete clients[page][sid];
+ if (Object.keys(clients[page]) == 0)
+ delete clients[page];
+ }
+ };
+ const messageListener = (objtxt) => {
let obj = JSON.parse(objtxt);
- if (!!obj.target && !clients[obj.target])
- return; //receiver not connected, nothing we can do
+ if (!!obj.target)
+ {
+ // Check if receiver is connected, because there may be some lag
+ // between a client disconnects and another notice.
+ if (Array.isArray(obj.target))
+ {
+ if (!clients[page][obj.target[0]] ||
+ !clients[page][obj.target[0]][obj.target[1]])
+ {
+ return;
+ }
+ }
+ else if (!clients[page][obj.target])
+ return;
+ }
switch (obj.code)
{
- case "pollclients":
- const curPage = clients[sid].page;
- socket.send(JSON.stringify({code:"pollclients",
- sockIds: Object.keys(clients).filter(k => k != sid &&
- (clients[k].page == curPage ||
- // Consider that people playing are in Hall too:
- (curPage == "/" && clients[k].page.indexOf("/game/") >= 0))
- )}));
+ // Wait for "connect" message to notify connection to the room,
+ // because if game loading is slow the message listener might
+ // not be ready too early.
+ case "connect":
+ {
+ notifyRoom(page, "connect");
+ if (page.indexOf("/game/") >= 0)
+ notifyRoom("/", "gconnect", {page:page});
break;
- case "pagechange":
- notifyRoom(clients[sid].page, "disconnect");
- if (clients[sid].page.indexOf("/game/") >= 0)
- notifyRoom("/", "disconnect");
- clients[sid].page = obj.page;
- notifyRoom(obj.page, "connect");
- if (obj.page.indexOf("/game/") >= 0)
- notifyRoom("/", "connect");
+ }
+ case "disconnect":
+ // When page changes:
+ deleteConnexion();
+ if (!clients[page] || !clients[page][sid])
+ {
+ // I effectively disconnected from this page:
+ notifyRoom(page, "disconnect");
+ if (page.indexOf("/game/") >= 0)
+ notifyRoom("/", "gdisconnect", {page:page});
+ }
break;
- case "askidentity":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"askidentity",from:sid}));
+ case "killme":
+ {
+ // Self multi-connect: manual removal + disconnect
+ const doKill = (pg) => {
+ Object.keys(clients[pg][obj.sid]).forEach(x => {
+ clients[pg][obj.sid][x].send(JSON.stringify({code: "killed"}));
+ });
+ delete clients[pg][obj.sid];
+ };
+ const disconnectFromOtherConnexion = (pg,code,o={}) => {
+ Object.keys(clients[pg]).forEach(k => {
+ if (k != obj.sid)
+ {
+ Object.keys(clients[pg][k]).forEach(x => {
+ clients[pg][k][x].send(JSON.stringify(Object.assign(
+ {code:code, from:obj.sid}, o)));
+ });
+ }
+ });
+ };
+ Object.keys(clients).forEach(pg => {
+ if (!!clients[pg][obj.sid])
+ {
+ doKill(pg);
+ disconnectFromOtherConnexion(pg, "disconnect");
+ if (pg.indexOf("/game/") >= 0 && !!clients["/"])
+ disconnectFromOtherConnexion("/", "gdisconnect", {page:pg});
+ }
+ });
break;
- case "askchallenge":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"askchallenge",from:sid}));
+ }
+ case "pollclients": //from Hall or Game
+ {
+ let sockIds = [];
+ Object.keys(clients[page]).forEach(k => {
+ // Avoid polling myself: no new information to get
+ if (k != sid)
+ sockIds.push(k);
+ });
+ socket.send(JSON.stringify({code:"pollclients", sockIds:sockIds}));
break;
- case "askgames":
+ }
+ case "pollclientsandgamers": //from Hall
{
- // Check all clients playing, and send them a "askgame" message
- let gameSids = {}; //game ID --> [sid1, sid2]
- const regexpGid = /\/[a-zA-Z0-9]+$/;
- Object.keys(clients).forEach(k => {
- if (k != sid && clients[k].page.indexOf("/game/") >= 0)
+ let sockIds = [];
+ Object.keys(clients["/"]).forEach(k => {
+ // Avoid polling myself: no new information to get
+ if (k != sid)
+ sockIds.push({sid:k});
+ });
+ // NOTE: a "gamer" could also just be an observer
+ Object.keys(clients).forEach(p => {
+ if (p != "/")
{
- const gid = clients[k].page.match(regexpGid)[0];
- if (!gameSids[gid])
- gameSids[gid] = [k];
- else
- gameSids[gid].push(k);
+ Object.keys(clients[p]).forEach(k => {
+ if (k != sid)
+ sockIds.push({sid:k, page:p}); //page needed for gamers
+ });
}
});
- // Request only one client out of 2 (TODO: this is a bit heavy)
- // Alt: ask game to all, and filter later?
- Object.keys(gameSids).forEach(gid => {
- const L = gameSids[gid].length;
- const idx = L > 1
- ? Math.floor(Math.random() * Math.floor(L))
- : 0;
- const rid = gameSids[gid][idx];
- clients[rid].sock.send(JSON.stringify(
- {code:"askgame", from: sid}));
- });
+ socket.send(JSON.stringify({code:"pollclientsandgamers", sockIds:sockIds}));
break;
}
+
+ // Asking something: from is fully identified,
+ // but the requested resource can be from any tmpId (except current!)
+ case "askidentity":
+ case "asklastate":
+ case "askchallenge":
+ case "askgame":
case "askfullgame":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"askfullgame", from:sid}));
- break;
- case "fullgame":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"fullgame", game:obj.game}));
- break;
- case "identity":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"identity",user:obj.user}));
- break;
- case "refusechallenge":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"refusechallenge", cid:obj.cid, from:sid}));
- break;
- case "deletechallenge":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"deletechallenge", cid:obj.cid, from:sid}));
- break;
- case "newgame":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"newgame", gameInfo:obj.gameInfo, cid:obj.cid}));
- break;
- case "challenge":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"challenge", chall:obj.chall, from:sid}));
- break;
- case "game":
- if (!!obj.target)
- {
- clients[obj.target].sock.send(JSON.stringify(
- {code:"game", game:obj.game, from:sid}));
- }
- else
+ {
+ const tmpIds = Object.keys(clients[page][obj.target]);
+ if (obj.target == sid) //targetting myself
{
- // Notify all room except opponent and me:
- notifyRoom("/", "game", {game:obj.game}, [obj.oppsid]);
+ const idx_myTmpid = tmpIds.findIndex(x => x == tmpId);
+ if (idx_myTmpid >= 0)
+ tmpIds.splice(idx_myTmpid, 1);
}
+ const tmpId_idx = Math.floor(Math.random() * tmpIds.length);
+ clients[page][obj.target][tmpIds[tmpId_idx]].send(
+ JSON.stringify({code:obj.code, from:[sid,tmpId]}));
break;
- case "newchat":
- // WARNING: do not use query["page"], because the page may change
- notifyRoom(clients[sid].page, "newchat",
- {msg: obj.msg, name: obj.name});
+ }
+
+ // Some Hall events: target all tmpId's (except mine),
+ case "refusechallenge":
+ case "startgame":
+ Object.keys(clients[page][obj.target]).forEach(x => {
+ if (obj.target != sid || x != tmpId)
+ {
+ clients[page][obj.target][x].send(JSON.stringify(
+ {code:obj.code, data:obj.data}));
+ }
+ });
break;
- // TODO: WebRTC instead in this case (most demanding?)
+
+ // Notify all room: mostly game events
+ case "newchat":
+ case "newchallenge":
+ case "newgame":
+ case "deletechallenge":
case "newmove":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"newmove", move:obj.move}));
- break;
- case "lastate":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"lastate", state:obj.state}));
- break;
case "resign":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"resign"}));
- break;
case "abort":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"abort",msg:obj.msg}));
- break;
case "drawoffer":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"drawoffer"}));
- break;
case "draw":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"draw"}));
+ notifyRoom(page, obj.code, {data:obj.data});
+ break;
+
+ // Passing, relaying something: from isn't needed,
+ // but target is fully identified (sid + tmpId)
+ case "challenge":
+ case "fullgame":
+ case "game":
+ case "identity":
+ case "lastate":
+ clients[page][obj.target[0]][obj.target[1]].send(JSON.stringify(
+ {code:obj.code, data:obj.data}));
break;
}
- });
- socket.on("close", () => {
- const page = clients[sid].page;
- delete clients[sid];
- notifyRoom(page, "disconnect");
- if (page.indexOf("/game/") >= 0)
- notifyRoom("/", "disconnect"); //notify main hall
- });
+ };
+ const closeListener = () => {
+ // For tab or browser closing:
+ deleteConnexion();
+ };
+ // Update clients object: add new connexion
+ if (!clients[page])
+ clients[page] = {[sid]: {[tmpId]: socket}};
+ else if (!clients[page][sid])
+ clients[page][sid] = {[tmpId]: socket};
+ else
+ clients[page][sid][tmpId] = socket;
+ socket.on("message", messageListener);
+ socket.on("close", closeListener);
});
}
projects / vchess.git / blobdiff