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 "/?"
return result;
}
+// Helper to safe-send some message through a (web-)socket:
+function send(socket, message)
+{
+ if (!!socket && socket.readyState == 1)
+ socket.send(JSON.stringify(message));
+}
+
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) => {
- Object.keys(clients).forEach(k => {
- if (k != sid && clients[k].page == page)
- clients[k].sock.send(JSON.stringify({code:code,sid:sid}));
+ 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;
+ send(clients[page][k][x], Object.assign({code:code, from:sid}, obj));
+ });
});
};
- notifyRoom(query["page"],"connect");
- 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 doDisconnect = () => {
+ 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});
+ }
+ };
+ const messageListener = (objtxt) => {
let obj = JSON.parse(objtxt);
- if (!!obj.target && !clients[obj.target])
- return; //receiver not connected, nothing we can do
switch (obj.code)
{
- case "pollclients":
- socket.send(JSON.stringify({code:"pollclients",
- sockIds: Object.keys(clients).filter(k =>
- k != sid && clients[k].page == obj.page)}));
- break;
- case "pagechange":
- notifyRoom(clients[sid].page, "disconnect");
- clients[sid].page = obj.page;
- notifyRoom(obj.page, "connect");
- break;
+ // 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 "disconnect":
+ // When page changes:
+ doDisconnect();
+ break;
+ case "killme":
+ {
+ // Self multi-connect: manual removal + disconnect
+ const doKill = (pg) => {
+ Object.keys(clients[pg][obj.sid]).forEach(x => {
+ send(clients[pg][obj.sid][x], {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 => {
+ send(clients[pg][k][x], 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 "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);
+ });
+ send(socket, {code:"pollclients", sockIds:sockIds});
+ break;
+ }
+ case "pollclientsandgamers": //from Hall
+ {
+ 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 != "/")
+ {
+ Object.keys(clients[p]).forEach(k => {
+ if (k != sid)
+ sockIds.push({sid:k, page:p}); //page needed for gamers
+ });
+ }
+ });
+ send(socket, {code:"pollclientsandgamers", sockIds:sockIds});
+ break;
+ }
+
+ // Asking something: from is fully identified,
+ // but the requested resource can be from any tmpId (except current!)
case "askidentity":
- clients[obj.target].sock.send(
- JSON.stringify({code:"askidentity",from:sid}));
- break;
+ case "asklastate":
case "askchallenge":
- clients[obj.target].sock.send(
- JSON.stringify({code:"askchallenge",from:sid}));
- break;
case "askgame":
- clients[obj.target].sock.send(
- JSON.stringify({code:"askgame",from:sid}));
- break;
- case "identity":
- clients[obj.target].sock.send(
- JSON.stringify({code:"identity",user:obj.user}));
- break;
+ case "askfullgame":
+ {
+ const pg = obj.page || page; //required for askidentity and askgame
+ // In cas askfullgame to wrong SID for example, would crash:
+ if (clients[pg] && clients[pg][obj.target])
+ {
+ const tmpIds = Object.keys(clients[pg][obj.target]);
+ if (obj.target == sid) //targetting myself
+ {
+ 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);
+ send(
+ clients[pg][obj.target][tmpIds[tmpId_idx]],
+ {code:obj.code, from:[sid,tmpId,page]}
+ );
+ }
+ break;
+ }
+
+ // Some Hall events: target all tmpId's (except mine),
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":
- clients[obj.target].sock.send(JSON.stringify(
- {code:"game", game:obj.game, from:sid}));
+ case "startgame":
+ Object.keys(clients[page][obj.target]).forEach(x => {
+ if (obj.target != sid || x != tmpId)
+ send(clients[page][obj.target][x], {code:obj.code, data:obj.data});
+ });
break;
+
+ // Notify all room: mostly game events
case "newchat":
- clients[obj.target].sock.send(JSON.stringify({code:"newchat",msg:obj.msg}));
- break;
- // TODO: WebRTC instead in this case (most demanding?)
+ case "newchallenge":
+ case "newgame":
+ case "deletechallenge":
case "newmove":
- clients[obj.target].sock.send(JSON.stringify({code:"newmove",move:obj.move}));
- break;
- case "ping":
- // If this code is reached, then obj.target is connected
- socket.send(JSON.stringify({code:"pong"}));
- break;
- case "lastate":
- const oppId = obj.target;
- obj.oppid = sid; //I'm the opponent of my opponent
- clients[oppId].sock.send(JSON.stringify(obj));
- 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});
+ const mygamesPg = "/mygames";
+ if (obj.code == "newmove" && clients[mygamesPg])
+ {
+ // Relay newmove info to myGames page
+ // NOTE: the move itself is not needed (for now at least)
+ const gid = page.split("/")[2]; //format is "/game/gid"
+ obj.data.players.forEach(pSid => {
+ if (clients[mygamesPg][pSid])
+ {
+ Object.keys(clients[mygamesPg][pSid]).forEach(x => {
+ send(
+ clients[mygamesPg][pSid][x],
+ {code:"newmove", gid:gid}
+ );
+ });
+ }
+ });
+ }
+ break;
+ }
+
+ case "result":
+ // Special case: notify all, 'transroom': Game --> Hall
+ notifyRoom("/", "result", {gid:obj.gid, score:obj.score});
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":
+ {
+ const pg = obj.target[2] || page; //required for identity and game
+ // NOTE: if in game we ask identity to opponent still in Hall,
+ // but leaving Hall, clients[pg] or clients[pg][target] could be ndefined
+ if (clients[pg] && clients[pg][obj.target[0]])
+ send(clients[pg][obj.target[0]][obj.target[1]], {code:obj.code, data:obj.data});
+ break;
+ }
}
- });
- socket.on("close", () => {
- const page = clients[sid].page;
- delete clients[sid];
- notifyRoom(page, "disconnect");
- });
+ };
+ const closeListener = () => {
+ // For browser or tab closing (including page reload):
+ doDisconnect();
+ };
+ // 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