/*
* Copyright (c) 2012 deNormans
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.denormans.googleanalyticsgwt.api;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.ScriptElement;
import com.google.gwt.user.client.Window;
import javax.annotation.Nullable;
public final class GoogleAnalytics extends JavaScriptObject {
private static boolean IsAlreadyInjected = false;
/* Must have zero-arg constructor */
protected GoogleAnalytics() {
}
public static void init() {
injectAnalytics(null);
}
public static void init(String defaultTrackerID) {
injectAnalytics(defaultTrackerID);
}
private static boolean isSSL() {
if (Window.Location.getProtocol().equals("https:")) {
return true;
}
return false;
}
private static boolean injectAnalytics(@Nullable final String defaultTrackerID) {
if (defaultTrackerID != null) {
setupDefaultTrackerID(defaultTrackerID);
}
if (IsAlreadyInjected) {
return true;
}
IsAlreadyInjected = true;
boolean isAlreadyLoaded = get() != null;
if (isAlreadyLoaded) {
return true;
}
String src;
if (isSSL()) {
src = "https://ssl.google-analytics.com/ga.js";
} else {
src = "http://www.google-analytics.com/ga.js";
}
Document doc = Document.get();
ScriptElement script = doc.createScriptElement();
script.setSrc(src);
script.setType("text/javascript");
script.setAttribute("async", "true");
doc.getBody().appendChild(script);
return false;
}
private static native void setupDefaultTrackerID(final String defaultTrackerID) /*-{
$wnd._gaq = $wnd._gaq || [];
$wnd._gaq.push(['_setAccount', defaultTrackerID]);
}-*/;
/**
* Return the Google Analytics API
*
* @return The API if available, otherwise <tt>null</tt>
*/
public static native GoogleAnalytics get() /*-{
return $wnd._gat;
}-*/;
/**
* Creates a page tracker with the given ID.
*
* @param trackerID The tracker ID
* @return A new page tracker with the given ID, if any
*
* @deprecated Use {@link #createTracker(String, String)} or {@link #withTracker(String, AsyncTrackerCommand)} instead
*/
@Deprecated
public synchronized static GoogleAnalyticsTracker getTracker(final String trackerID) {
final GoogleAnalytics googleAnalytics = get();
if (googleAnalytics == null) {
return null;
}
return googleAnalytics.getTrackerJS(trackerID);
}
private native GoogleAnalyticsTracker getTrackerJS(final String trackerID) /*-{
return this._getTracker(trackerID);
}-*/;
/**
* Execute the given command with the default tracker.
*
* @param command The command to execute
*/
public static void withTracker(final AsyncTrackerCommand command) {
withTracker("", command);
}
/**
* Execute the given command with the tracker.
*
* @param trackerName The tracker name
* @param command The command to execute
*/
public static native void withTracker(final String trackerName, final AsyncTrackerCommand command) /*-{
$wnd._gaq = $wnd._gaq || [];
$wnd._gaq.push(function() {
@com.denormans.googleanalyticsgwt.api.GoogleAnalytics::executeWithTracker(Ljava/lang/String;Lcom/denormans/googleanalyticsgwt/api/AsyncTrackerCommand;)(trackerName, command);
});
}-*/;
private static void executeWithTracker(String trackerName, final AsyncTrackerCommand command) {
GoogleAnalytics googleAnalytics = get();
command.execute(googleAnalytics, googleAnalytics.getTrackerByName(trackerName));
}
/**
* Creates the default page tracker with the given ID.
*
* @param trackerID The tracker ID
* @return A new event tracker with the given ID
*/
public native GoogleAnalyticsTracker createDefaultTracker(final String trackerID) /*-{
return this._createTracker(trackerID);
}-*/;
/**
* Creates a page tracker with the given ID.
*
* @param trackerID The tracker ID
* @param trackerName The name of the tracker to be retrieved later
* @return A new event tracker with the given ID
*/
public native GoogleAnalyticsTracker createTracker(final String trackerID, final String trackerName) /*-{
return this._createTracker(trackerID, trackerName);
}-*/;
/**
* Retrieves the default tracker.
*
* @return The default event tracker if available, otherwise <tt>null</tt>
*/
public native GoogleAnalyticsTracker getDefaultTracker() /*-{
return this._getTrackerByName();
}-*/;
/**
* Retrieves a tracker by name.
*
* @param trackerName The name of the tracker to retrieve
*
* @return The event tracker if available, otherwise <tt>null</tt>
*/
public native GoogleAnalyticsTracker getTrackerByName(final String trackerName) /*-{
return this._getTrackerByName(trackerName);
}-*/;
/**
* Clear out the last octet of the IP address
*/
public native void anonymizeIP() /*-{
this._anonymizeIp();
}-*/;
}