Numerous graph fixes

lib/util.js

@@ -61,6 +61,29 @@ function trimUselessPings(data) {
 	}
 }
 
+exports.trimOldPings = function(data) {
+	var keys = Object.keys(data);
+
+	var timeMs = exports.getCurrentTimeMs();
+
+	for (var x = 0; x < keys.length; x++) {
+		var listing = data[keys[x]];
+		var toSplice = [];
+
+		for (var i = 0; i < listing.length; i++) {
+			var entry = listing[i];
+
+			if (timeMs - entry[0] > config.graphDuration) {
+				toSplice.push(i);
+			}
+		}
+
+		for (var i = 0; i < toSplice.length; i++) {
+			listing.splice(toSplice[i], 1);
+		}
+	}
+}
+
 exports.getCurrentTimeMs = function() {
     return new Date().getTime();
 };
@@ -89,5 +112,8 @@ exports.convertPingsToGraph = function(sqlData) {
 	// Break it into minutes.
 	trimUselessPings(graphData);
 
+	// Drop old data.
+	exports.trimOldPings(graphData);
+
 	return graphData;
 };