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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_GOOGLE_GOOGLE_SEARCH_COUNTER_H_
#define CHROME_BROWSER_GOOGLE_GOOGLE_SEARCH_COUNTER_H_
#include "base/memory/singleton.h"
#include "chrome/browser/google/google_search_metrics.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
// A listener for counting Google searches from various search access points. No
// actual search query content is observed. See GoogleSearchMetrics for more
// details about these access points.
class GoogleSearchCounter : content::NotificationObserver {
public:
// Initialize the global instance.
static void RegisterForNotifications();
// Return the singleton instance of GoogleSearchCounter.
static GoogleSearchCounter* GetInstance();
private:
friend struct DefaultSingletonTraits<GoogleSearchCounter>;
friend class GoogleSearchCounterTest;
GoogleSearchCounter();
virtual ~GoogleSearchCounter();
void ProcessCommittedEntry(const content::NotificationSource& source,
const content::NotificationDetails& details);
// Replace the internal metrics object with a dummy or a mock. This instance
// takes ownership of |search_metrics|.
void SetSearchMetricsForTesting(GoogleSearchMetrics* search_metrics);
// Register this counter for all notifications we care about.
void RegisterForNotificationsInternal();
// content::NotificationObserver
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
content::NotificationRegistrar registrar_;
scoped_ptr<GoogleSearchMetrics> search_metrics_;
DISALLOW_COPY_AND_ASSIGN(GoogleSearchCounter);
};
#endif // CHROME_BROWSER_GOOGLE_GOOGLE_SEARCH_COUNTER_H_
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