[Issue #276] Round off timestamps when uploading user data

data/collusion.js

@@ -1,5 +1,6 @@
 'use strict';
 
+const roundOffFactor = 5*60*1000; // in milliseconds
 var visualizations = {};
 var currentVisualization;
 var allConnections = [];
@@ -237,7 +238,7 @@ function sharingData(){
     var connections = allConnections.filter(function(connection){
         return ( connection[TIMESTAMP] ) > lastUpload;
     });
-    var data = exportFormat(connections);
+    var data = exportFormat(connections,true); // round off timestamp
     var request = new XMLHttpRequest();
     request.open("POST", uploadServer, true);
     request.setRequestHeader("Collusion-Share-Data","collusion");

data/ui.js

@@ -299,12 +299,16 @@ document.querySelector(".stage").addEventListener("mouseleave",function(event){
 
 /* Export ========== */
 
-function exportFormat(connections){
+function exportFormat(connections, roundOff){
+    var tempConnections = excludePrivateConnection(connections).slice(0);
+    if ( roundOff ){
+        tempConnections = roundOffTimestamp(tempConnections);
+    }
     return JSON.stringify({
         format: 'Collusion Save File',
         version: '1.1',
         token: localStorage.collusionToken,
-        connections: excludePrivateConnection(connections)
+        connections: tempConnections
     });
 }
 
@@ -315,6 +319,15 @@ function excludePrivateConnection(connections){
     })
 }
 
+function roundOffTimestamp(connections){
+    return  connections.map(function(conn){
+                var tempConn = conn.slice(0);
+                tempConn[TIMESTAMP] -= ( tempConn[TIMESTAMP] % roundOffFactor );
+                return tempConn; 
+            });
+}
+
+
 /* Info Panel Connections List ===================================== */
 
 document.querySelector(".connections-list ul").addEventListener("click", function(event){