re-implement google analytics

gulpfile.js

@@ -106,7 +106,8 @@ gulp.task('serve', function() {
 			var next = '^/next(.*)$ http://localhost:8083/next$1 [P]';
 			var logout = '^/logout$ http://localhost:8083/logout [P]';
 			var custom_css = '^/custom_css.css$ http://localhost:8083/custom_css.css [P]';
-			return [modRewrite([rest, next, logout, custom_css])];
+			var analytics = '^/analytics.js http://localhost:8083/analytics.js [P]';
+			return [modRewrite([rest, next, logout, custom_css, analytics])];
 		}
 	});
 });

pom.xml

@@ -154,9 +154,14 @@
 			<version>${dropwizard.version}</version>
 		</dependency>
 		<dependency>
-			<groupId>io.federecio</groupId>
-			<artifactId>dropwizard-swagger</artifactId>
-			<version>0.5.1</version>
+			<groupId>io.dropwizard</groupId>
+			<artifactId>dropwizard-assets</artifactId>
+			<version>${dropwizard.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>com.wordnik</groupId>
+			<artifactId>swagger-jaxrs_2.10</artifactId>
+			<version>1.3.2</version>
 			<exclusions>
 				<exclusion>
 					<artifactId>jsr311-api</artifactId>

src/main/app/index.html

@@ -74,5 +74,6 @@
 	
 	<script type="text/javascript" src="js/templates.js"></script>
 	<!-- endbuild -->
+	<script type="text/javascript" src="analytics.js"></script>
 </body>
 </html>

src/main/java/com/commafeed/CommaFeedApplication.java

@@ -77,6 +77,7 @@ import com.commafeed.frontend.resource.FeedREST;
 import com.commafeed.frontend.resource.PubSubHubbubCallbackREST;
 import com.commafeed.frontend.resource.ServerREST;
 import com.commafeed.frontend.resource.UserREST;
+import com.commafeed.frontend.servlet.AnalyticsServlet;
 import com.commafeed.frontend.servlet.CustomCssServlet;
 import com.commafeed.frontend.servlet.LogoutServlet;
 import com.commafeed.frontend.servlet.NextUnreadServlet;
@@ -208,9 +209,11 @@ public class CommaFeedApplication extends Application<CommaFeedConfiguration> {
 				feedCategoryDAO, config);
 		LogoutServlet logoutServlet = new LogoutServlet(config);
 		CustomCssServlet customCssServlet = new CustomCssServlet(sessionFactory, userSettingsDAO, config);
+		AnalyticsServlet analyticsServlet = new AnalyticsServlet(config);
 		environment.servlets().addServlet("next", nextUnreadServlet).addMapping("/next");
 		environment.servlets().addServlet("logout", logoutServlet).addMapping("/logout");
 		environment.servlets().addServlet("customCss", customCssServlet).addMapping("/custom_css.css");
+		environment.servlets().addServlet("analytics.js", analyticsServlet).addMapping("/analytics.js");
 
 		// Tasks
 		SchedulingService schedulingService = new SchedulingService();

src/main/java/com/commafeed/frontend/servlet/AnalyticsServlet.java

@@ -0,0 +1,48 @@
+package com.commafeed.frontend.servlet;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.lang.StringUtils;
+
+import com.commafeed.CommaFeedConfiguration;
+
+@SuppressWarnings("serial")
+public class AnalyticsServlet extends HttpServlet {
+
+	private CommaFeedConfiguration config;
+	private String script;
+
+	public AnalyticsServlet(CommaFeedConfiguration config) {
+		this.config = config;
+
+		// @formatter:off
+		this.script = "(function(i, s, o, g, r, a, m) {" + 
+				"i['GoogleAnalyticsObject'] = r;" + 
+				"i[r] = i[r] || function() {" + 
+				"(i[r].q = i[r].q || []).push(arguments)" + 
+				"}, i[r].l = 1 * new Date();" + 
+				"a = s.createElement(o), m = s.getElementsByTagName(o)[0];" + 
+				"a.async = 1;" + 
+				"a.src = g;" + 
+				"m.parentNode.insertBefore(a, m)" + 
+				"})(window, document, 'script', '//www.google-analytics.com/analytics.js', 'ga');" + 
+			
+				"ga('create', '" + config.getApplicationSettings().getGoogleAnalyticsTrackingCode() + "');" + 
+				"ga('send', 'pageview');";
+		// @formatter:on
+	}
+
+	@Override
+	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+		resp.setContentType("text/javascript");
+		if (StringUtils.isNotBlank(config.getApplicationSettings().getGoogleAnalyticsTrackingCode())) {
+			resp.getWriter().write(script);
+		}
+	}
+
+}