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 "/?"
- let result = {};
- query.split("&").forEach((part) => {
- const item = part.split("=");
- result[item[0]] = decodeURIComponent(item[1]);
- });
- return result;
+ const query = url.substr(2); //starts with "/?"
+ let result = {};
+ query.split("&").forEach((part) => {
+ const item = part.split("=");
+ result[item[0]] = decodeURIComponent(item[1]);
+ });
+ return result;
}
-// Removal in array of strings (socket IDs)
-function remInArray(arr, item)
-{
- const idx = arr.indexOf(item);
- if (idx >= 0)
- arr.splice(idx, 1);
-}
-
-// TODO: empêcher multi-log du même user (envoyer le user ID + secret en même temps que name et...)
-// --> si secret ne matche pas celui trouvé en DB, stop
-// TODO: this file "in the end" would be much simpler, essentially just tracking connect/disconnect
-// (everything else using WebRTC)
-// TODO: lorsque challenge accepté, seul le dernier joueur à accepter envoi message "please start game"
-// avec les coordonnées des participants. Le serveur renvoit alors les détails de la partie (couleurs, position)
-//TODO: programmatic re-navigation on current game if we receive a move and are not there
-
module.exports = function(wss) {
- let clients = {}; //associative array sid --> socket
- wss.on("connection", (socket, req) => {
- const query = getJsonFromUrl(req.url);
- const sid = query["sid"];
- // Ignore duplicate connections (on the same live game that we play):
- if (!!clients[sid])
- return socket.send(JSON.stringify({code:"duplicate"}));
- clients[sid] = socket;
- // Notify room:
- Object.keys(clients).forEach(k => {
- if (k != sid)
- clients[k].send(JSON.stringify({code:"connect",sid:sid}));
- });
- socket.on("message", objtxt => {
- let obj = JSON.parse(objtxt);
- if (!!obj.target && !clients[obj.target])
- return; //receiver not connected, nothing we can do
- //console.log(obj.code);
- switch (obj.code)
- {
- case "pollclients":
- socket.send(JSON.stringify({code:"pollclients",
- sockIds:Object.keys(clients).filter(k => k != sid)}));
+ // 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"];
+ 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)));
+ });
+ });
+ };
+ 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)
+ {
+ // 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)
+ {
+ // 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 "askidentity":
- clients[obj.target].send(
- JSON.stringify({code:"askidentity",from:sid}));
+ }
+ 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 "askchallenge":
- clients[obj.target].send(
- JSON.stringify({code:"askchallenge",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 "askgame":
- clients[obj.target].send(
- JSON.stringify({code:"askgame",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 "identity":
- clients[obj.target].send(
- JSON.stringify({code:"identity",user:obj.user}));
+ }
+ 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
+ });
+ }
+ });
+ socket.send(JSON.stringify({code:"pollclientsandgamers", sockIds:sockIds}));
break;
- case "challenge":
- // Relay challenge to other player
- clients[obj.target].send(
- JSON.stringify({code:"challenge", chall:obj.challenge, from:sid}));
+ }
+
+ // 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":
+ {
+ const tmpIds = Object.keys(clients[page][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);
+ clients[page][obj.target][tmpIds[tmpId_idx]].send(
+ JSON.stringify({code:obj.code, from:[sid,tmpId]}));
break;
- case "game":
- // Relay (live) game to other player
+ }
+
+ // 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;
- case "newchat":
- clients[obj.target].send(JSON.stringify({code:"newchat",msg:obj.msg}));
- break;
- // Transmit chats and moves to current room
- // TODO: WebRTC instead in this case (most demanding?)
- case "newmove":
- clients[obj.target].send(JSON.stringify({code:"newmove",move:obj.move}));
- break;
- // TODO: generalize that for several opponents
- case "ping":
- socket.send(JSON.stringify({code:"pong",gameId:obj.gameId}));
- break;
- case "lastate":
- const oppId = obj.target;
- obj.oppid = sid; //I'm the opponent of my opponent(s)
- clients[oppId].send(JSON.stringify(obj));
- break;
- // TODO: moreover, here, game info should be sent (through challenge; not stored here)
- case "newgame":
- clients[obj.target].send(JSON.stringify({code:"newgame", game:obj.game}));
- break;
- case "cancelnewgame": //if a user cancel his seek
- // TODO: just transmit event
- //delete games[page];
- break;
- // TODO: also other challenge events
- case "resign":
- clients[obj.target].send(JSON.stringify({code:"resign"}));
- break;
- // TODO: case "challenge" (get ID) --> send to all, "acceptchallenge" (with ID) --> send to all, "cancelchallenge" --> send to all
- // also, "sendgame" (give current game info, if any) --> to new connections, "sendchallenges" (same for challenges) --> to new connections
+
+ // Notify all room: mostly game events
+ case "newchat":
case "newchallenge":
- console.log("challenge received");
- console.log(obj.sender);
- console.log(obj);
+ case "newgame":
+ case "deletechallenge":
+ case "newmove":
+ case "resign":
+ case "abort":
+ case "drawoffer":
+ case "draw":
+ notifyRoom(page, obj.code, {data:obj.data});
break;
- }
- });
- socket.on("close", () => {
- delete clients[sid];
- // Notify every other connected client
- Object.keys(clients).forEach( k => {
- clients[k].send(JSON.stringify({code:"disconnect",sid:sid}));
- });
- });
- });
+
+ // 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;
+ }
+ };
+ 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