src/chrome/browser/notifications/google_now_notification_stats_collector.cc

   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 #include "chrome/browser/notifications/google_now_notification_stats_collector.h"
   6
   7 #include <string>
   8
   9 #include "base/metrics/sparse_histogram.h"
  10 #include "chrome/browser/browser_process.h"
  11 #include "chrome/browser/notifications/extension_welcome_notification.h"
  12 #include "chrome/browser/notifications/notification.h"
  13 #include "chrome/browser/notifications/notification_ui_manager.h"
  14 #include "content/public/browser/user_metrics.h"
  15 #include "ui/message_center/notification.h"
  16
  17 namespace {
  18 const int kNotificationsMaxCount = 20;
  19 }
  20
  21 GoogleNowNotificationStatsCollector::GoogleNowNotificationStatsCollector(
  22     message_center::MessageCenter* message_center)
  23     : message_center_(message_center) {
  24   message_center_->AddObserver(this);
  25 }
  26
  27 GoogleNowNotificationStatsCollector::~GoogleNowNotificationStatsCollector() {
  28   message_center_->RemoveObserver(this);
  29 }
  30
  31 void GoogleNowNotificationStatsCollector::OnNotificationDisplayed(
  32     const std::string& notification_id,
  33     const message_center::DisplaySource source) {
  34   if ((source == message_center::DISPLAY_SOURCE_POPUP) &&
  35       IsNotificationIdForGoogleNow(notification_id)) {
  36     content::RecordAction(
  37         base::UserMetricsAction(
  38             "GoogleNow.MessageCenter.NotificationPoppedUp"));
  39   }
  40 }
  41
  42 void GoogleNowNotificationStatsCollector::OnCenterVisibilityChanged(
  43     message_center::Visibility visibility) {
  44   if (visibility == message_center::VISIBILITY_MESSAGE_CENTER) {
  45     UMA_HISTOGRAM_SPARSE_SLOWLY(
  46         "GoogleNow.MessageCenter.Displayed.NotificationsVisible",
  47         std::min(CountVisibleGoogleNowNotifications(), kNotificationsMaxCount));
  48   }
  49 }
  50
  51 bool GoogleNowNotificationStatsCollector::IsNotificationIdForGoogleNow(
  52   const std::string& notification_id) {
  53   bool isGoogleNowNotification = false;
  54   const Notification* const notification =
  55       g_browser_process->notification_ui_manager()->FindById(notification_id);
  56   if (notification) {
  57     isGoogleNowNotification =
  58         ((notification->notifier_id().type ==
  59               message_center::NotifierId::APPLICATION) &&
  60         (notification->notifier_id().id ==
  61               ExtensionWelcomeNotification::kChromeNowExtensionID));
  62   }
  63   return isGoogleNowNotification;
  64 }
  65
  66 int GoogleNowNotificationStatsCollector::CountVisibleGoogleNowNotifications() {
  67   typedef message_center::NotificationList::Notifications Notifications;
  68   const Notifications visible_notifications =
  69       message_center_->GetVisibleNotifications();
  70   int google_now_notification_count = 0;
  71   for (Notifications::iterator iter = visible_notifications.begin();
  72       iter != visible_notifications.end();
  73       ++iter) {
  74     if ((*iter)->notifier_id().id ==
  75             ExtensionWelcomeNotification::kChromeNowExtensionID)
  76       google_now_notification_count++;
  77   }
  78   return google_now_notification_count;
  79 }