comparison js/core.js @ 3118:f78a66fbc018

Better asynchronous catcher. If a long queue of file uploads builds up, will resolve to the last in the queue

     this.SessionKey = (function (parent) {
         var returnURL = "";
         if (window.returnURL !== undefined) {
             returnURL = String(window.returnURL);
         }
+        
+        var chainCount = 0;
+        var chainPosition = chainCount;
 
         function postUpdate() {
-            // Return a new promise.
-            var hold = document.createElement("div");
-            var clone = parent.root.cloneNode(true);
-            hold.appendChild(clone);
             return new Promise(function (resolve, reject) {
+                // Return a new promise.
+                chainPosition+=1;
+                var hold = document.createElement("div");
+                var clone = parent.root.cloneNode(true);
+                hold.appendChild(clone);
                 // Do the usual XHR stuff
                 console.log("Requested save...");
                 var req = new XMLHttpRequest();
                 req.open("POST", returnURL + "php/save.php?key=" + sessionKey + "&saveFilenamePrefix=" + parent.filenamePrefix);
                 req.setRequestHeader('Content-Type', 'text/xml');

                 req.onerror = function () {
                     reject(Error("Network Error"));
                 };
 
                 // Make the request
-                req.send([hold.innerHTML]);
+                if (chainCount > chainPosition) {
+                    // We have items downstream that will upload for us
+                    resolve(true);
+                } else {
+                    req.send([hold.innerHTML]);
+                }
             });
         }
 
         function keyPromise() {
             return new Promise(function (resolve, reject) {

             "update": {
                 "value": function () {
                     if (requestChains === undefined) {
                         throw ("Initiate key exchange first");
                     }
+                    chainCount += 1;
                     this.parent.root.setAttribute("state", "update");
                     requestChains = requestChains.then(postUpdate);
                 }
             },
             "finish": {