refactored client ping-pong

app.js

@@ -267,7 +267,7 @@ client.on('connection', function(clientSpark)
 
 	clientSpark.on('client-pong', function (data)
 	{
-		var latency = Math.ceil( (_.now() - clientLatency) / 2 );
+		var latency = Math.ceil( (_.now() - data.serverTime) / 2 );
 
 		clientSpark.emit('client-latency', { latency: latency });
 	});
@@ -275,9 +275,12 @@ client.on('connection', function(clientSpark)
 
 var latencyTimeout = setInterval( function ()
 {
-	clientLatency = _.now();
-
-	client.write({ action: 'client-ping' });
+	client.write({
+		action: 'client-ping',
+		data: {
+			serverTime: _.now()
+		}
+	});
 }, 5000);
 
 

src/js/controllers.js

@@ -333,7 +333,10 @@ netStatsApp.controller('StatsCtrl', function($scope, $filter, socket, _, toastr)
 				break;
 
 			case "client-ping":
-				socket.emit('client-pong');
+				socket.emit('client-pong', {
+					serverTime: data.serverTime,
+					clientTime: _.now()
+				});
 
 				break;
 		}