1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_NOTIFICATIONS_GOOGLE_NOW_NOTIFICATION_STATS_COLLECTOR_H_
6#define CHROME_BROWSER_NOTIFICATIONS_GOOGLE_NOW_NOTIFICATION_STATS_COLLECTOR_H_
7
8#include <string>
9
10#include "ui/message_center/message_center.h"
11#include "ui/message_center/message_center_observer.h"
12#include "ui/message_center/message_center_types.h"
13
14// The Google Now Notification Stats Collector listens for message center
15// events and records stats about Google Now specific notifications.
16class GoogleNowNotificationStatsCollector
17    : public message_center::MessageCenterObserver {
18 public:
19  explicit GoogleNowNotificationStatsCollector(
20      message_center::MessageCenter* message_center);
21  virtual ~GoogleNowNotificationStatsCollector();
22
23 private:
24  // MessageCenterObserver
25  virtual void OnNotificationDisplayed(
26      const std::string& notification_id,
27      const message_center::DisplaySource source) OVERRIDE;
28  virtual void OnCenterVisibilityChanged(
29      message_center::Visibility visibility) OVERRIDE;
30
31  // Counts the number of Google Now Notifications in the message center.
32  int CountVisibleGoogleNowNotifications();
33
34  // Returns true if the notification ID is for Google Now.
35  bool IsNotificationIdForGoogleNow(const std::string& notification_id);
36
37  // Weak, global.
38  message_center::MessageCenter* message_center_;
39
40  DISALLOW_COPY_AND_ASSIGN(GoogleNowNotificationStatsCollector);
41};
42
43#endif  // CHROME_BROWSER_NOTIFICATIONS_GOOGLE_NOW_NOTIFICATION_STATS_COLLECTOR_H_
44