Fixes

[vchess.git] / server / sockets.js

diff --git a/server/sockets.js b/server/sockets.js
index 75aeadd..45e003f 100644 (file)
--- a/server/sockets.js
+++ b/server/sockets.js
@@ -1,6 +1,7 @@
 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 "/?"
@@ -17,9 +18,6 @@ module.exports = function(wss) {
   wss.on("connection", (socket, req) => {
     const query = getJsonFromUrl(req.url);
     const sid = query["sid"];
-    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)
@@ -31,15 +29,27 @@ module.exports = function(wss) {
         }
       });
     };
-    // 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.
-    socket.on("message", objtxt => {
+    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 "duplicate":
+          // Turn off message listening, and send disconnect if needed:
+          socket.removeListener("message", messageListener);
+          socket.removeListener("close", closeListener);
+          // From obj.page to clients[sid].page (TODO: unclear)
+          if (clients[sid].page != obj.page)
+          {
+            notifyRoom(obj.page, "disconnect");
+            if (obj.page.indexOf("/game/") >= 0)
+              notifyRoom("/", "gdisconnect");
+          }
+          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":
         {
           const curPage = clients[sid].page;
@@ -65,11 +75,13 @@ module.exports = function(wss) {
           break;
         case "pagechange":
           // page change clients[sid].page --> obj.page
+          // TODO: some offline rooms don't need to receive disconnect event
           notifyRoom(clients[sid].page, "disconnect");
           if (clients[sid].page.indexOf("/game/") >= 0)
             notifyRoom("/", "gdisconnect");
           clients[sid].page = obj.page;
-          notifyRoom(obj.page, "connect");
+          // No need to notify connection: it's self-sent in .vue file
+          //notifyRoom(obj.page, "connect");
           if (obj.page.indexOf("/game/") >= 0)
             notifyRoom("/", "gconnect");
           break;
@@ -77,6 +89,10 @@ module.exports = function(wss) {
           clients[obj.target].sock.send(JSON.stringify(
             {code:"askidentity",from:sid}));
           break;
+        case "asklastate":
+          clients[obj.target].sock.send(JSON.stringify(
+            {code:"asklastate",from:sid}));
+          break;
         case "askchallenge":
           clients[obj.target].sock.send(JSON.stringify(
             {code:"askchallenge",from:sid}));
@@ -109,6 +125,10 @@ module.exports = function(wss) {
           });
           break;
         }
+        case "askgame":
+          clients[obj.target].sock.send(JSON.stringify(
+            {code:"askgame", from:sid}));
+          break;
         case "askfullgame":
           clients[obj.target].sock.send(JSON.stringify(
             {code:"askfullgame", from:sid}));
@@ -153,7 +173,7 @@ module.exports = function(wss) {
           notifyRoom(clients[sid].page, "newchat", {chat:obj.chat});
           break;
         // TODO: WebRTC instead in this case (most demanding?)
-        // --> At least do a "notifyRoom"
+        // --> Or else: at least do a "notifyRoom" (also for draw, resign...)
         case "newmove":
           clients[obj.target].sock.send(JSON.stringify(
             {code:"newmove", move:obj.move}));
@@ -179,13 +199,22 @@ module.exports = function(wss) {
             {code:"draw", message:obj.message}));
           break;
       }
-    });
-    socket.on("close", () => {
+    };
+    const closeListener = () => {
       const page = clients[sid].page;
       delete clients[sid];
       notifyRoom(page, "disconnect");
       if (page.indexOf("/game/") >= 0)
         notifyRoom("/", "gdisconnect"); //notify main hall
-    });
+    };
+    if (!!clients[sid])
+    {
+      // Turn off old sock through current client:
+      clients[sid].sock.send(JSON.stringify({code:"duplicate"}));
+    }
+    // Potentially replace current connection:
+    clients[sid] = {sock: socket, page: query["page"]};
+    socket.on("message", messageListener);
+    socket.on("close", closeListener);
   });
 }