updated analytics

accumulate pageviews, uniquevisitors and uniqueIps locally and update db
every 10 mins instead of on every page view

src/analytics.js

@@ -0,0 +1,63 @@
+'use strict';
+
+var cronJob = require('cron').CronJob,
+	db = require('./database');
+
+
+(function(Analytics) {
+
+	var pageViews = 0;
+	var uniqueIPCount = 0;
+	var uniquevisitors = 0;
+
+	new cronJob('*/10 * * * *', function() {
+		Analytics.writeData();
+	}, null, true);
+
+	Analytics.pageView = function(ip) {
+		++pageViews;
+
+		if (ip) {
+			db.sortedSetScore('ip:recent', ip, function(err, score) {
+				if (err) {
+					return;
+				}
+				if (!score) {
+					++uniqueIPCount;
+				}
+				var today = new Date();
+				today.setHours(today.getHours(), 0, 0, 0);
+				if (!score || score < today.getTime()) {
+					++uniquevisitors;
+					db.sortedSetAdd('ip:recent', Date.now(), ip);
+				}
+			});
+		}
+	};
+
+	Analytics.writeData = function() {
+
+		var today;
+		if (pageViews > 0 || uniquevisitors > 0) {
+			today = new Date();
+			today.setHours(today.getHours(), 0, 0, 0);
+		}
+
+		if (pageViews > 0) {
+			db.sortedSetIncrBy('analytics:pageviews', pageViews, today.getTime());
+			pageViews = 0;
+		}
+
+		if (uniquevisitors > 0) {
+			db.sortedSetIncrBy('analytics:uniquevisitors', uniquevisitors, today.getTime());
+			uniquevisitors = 0;
+		}
+
+		if (uniqueIPCount > 0) {
+			db.incrObjectFieldBy('global', 'uniqueIPCount', uniqueIPCount);
+			uniqueIPCount = 0;
+		}
+	};
+
+
+}(exports));