fixed up visibility change detection

server.js

@@ -134,6 +134,9 @@ app.ws('/ws/:uid', (ws, req) => {
     ws.on("message", (msg) => {
         //console.log("received messsage: " + msg);
     });
+    ws.on("close", () => {
+        console.log("socket closed for user " + req.params.uid);
+    });
     console.log("socket opened for user " + req.params.uid);
 });
 

static/app.js

@@ -278,9 +278,25 @@ store.do('hash.update');
 appComponent.render();
 
 
-// refresh on focus
-window.addEventListener("focus", () => {
-    store.do("load.boards");
-    store.do("load.board");
-    dispatchSocketConnect();
+// refresh on load.  
+window.lastVisibilityChange = new Date().getTime();
+document.addEventListener("visibilitychange", async () => {
+    
+    let now = new Date().getTime();
+
+    // only run if we haven't run in the last second.. prevent double updates
+    if ( document.visibilityState === 'visible' && (now - window.lastVisibilityChange) > 1000) {
+        window.lastVisibilityChange = now;
+
+        let connected = false;
+        if ( dispatchSocketConnect ){ // maybe we stripped out web sockets
+            connected = await dispatchSocketConnect();
+        }
+
+        if ( !connected ){
+            store.do("load.boards");
+            store.do("load.board");
+        }
+    }
+
 });

static/utils.js

@@ -61,6 +61,21 @@ function getPinById(id){
     return store.data.board.pins[getPinIndexById(id)];
 }
 
+async function sleep(ms){ return new Promise((resolve) => setTimeout(resolve, ms)); }
+
+// async function runAfter(f, ms){
+//     return new Promise( (resolve,reject) => {
+//         setTimeout( () => {
+//             try {
+//                 await f();
+//                 resolve();
+//             } catch (e){
+//                 reject(e);
+//             }
+//         }, ms);
+//     });
+// }
+
 // feature detection
 if ( 'ontouchstart' in window ){
     window.isTouch = true;

static/ws.js

@@ -23,39 +23,37 @@ window.addEventListener("socket-connect", () => {
     socketConnect();
 });
 
-function socketConnect(){
+async function socketConnect(){
 
     if ( !window.uid ){
         console.log("no user id, can't open a socket");
-        return;
+        return false;
     }
 
     if ( window.socketConnected ){
         console.log("web socket already connected");
-        return;
+        return true;
     }
 
     window.socketConnected = false;
 
     let s = new WebSocket(getSocketUrl());
 
-    s.onopen = (e) => {
+    s.onopen = async (e) => {
         console.log("web socket connected");
 
-        // wait 10ms to see if the socket stays connected
-        setTimeout( () => {
-            if ( s.readyState == WebSocket.OPEN ){
-                console.log("web socket appears operational");
-                document.body.classList.add("socketConnected");
-                window.socketConnected = true;
-                window.socketConnectFailureCount = 0;
+        // wait 50ms to see if the socket stays connected
+        await sleep(50);
 
-                store.do("load.boards");
-                store.do("load.board");                
-            } else {
-                console.log("web socket connect failed");
-            }
-        }, 10);
+        if ( s.readyState == WebSocket.OPEN ){
+            console.log("web socket appears operational");
+            document.body.classList.add("socketConnected");
+            window.socketConnected = true;
+            return true;
+        } else {
+            console.log("web socket connect failed");
+            return false;
+        }
     };
     
     s.onmessage = (e) => {