chrome/browser/notifications/google_now_notification_stats_collector.h

   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.
  16 class GoogleNowNotificationStatsCollector
  17     : public message_center::MessageCenterObserver {
  18  public:
  19   explicit GoogleNowNotificationStatsCollector(
  20       message_center::MessageCenter* message_center);
  21   ~GoogleNowNotificationStatsCollector() override;
  22
  23  private:
  24   // MessageCenterObserver
  25   void OnNotificationDisplayed(
  26       const std::string& notification_id,
  27       const message_center::DisplaySource source) override;
  28   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 ID of a visible notification is for Google Now.
  35   bool IsVisibleNotificationIdForGoogleNow(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_