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 // TODO(dewittj) remove the dependency on the MessageCenter because this
  22 // violates layering.
  23 GoogleNowNotificationStatsCollector::GoogleNowNotificationStatsCollector(
  24     message_center::MessageCenter* message_center)
  25     : message_center_(message_center) {
  26   message_center_->AddObserver(this);
  27 }
  28
  29 GoogleNowNotificationStatsCollector::~GoogleNowNotificationStatsCollector() {
  30   message_center_->RemoveObserver(this);
  31 }
  32
  33 void GoogleNowNotificationStatsCollector::OnNotificationDisplayed(
  34     const std::string& notification_id,
  35     const message_center::DisplaySource source) {
  36   if ((source == message_center::DISPLAY_SOURCE_POPUP) &&
  37       IsVisibleNotificationIdForGoogleNow(notification_id)) {
  38     content::RecordAction(
  39         base::UserMetricsAction(
  40             "GoogleNow.MessageCenter.NotificationPoppedUp"));
  41   }
  42 }
  43
  44 void GoogleNowNotificationStatsCollector::OnCenterVisibilityChanged(
  45     message_center::Visibility visibility) {
  46   if (visibility == message_center::VISIBILITY_MESSAGE_CENTER) {
  47     UMA_HISTOGRAM_SPARSE_SLOWLY(
  48         "GoogleNow.MessageCenter.Displayed.NotificationsVisible",
  49         std::min(CountVisibleGoogleNowNotifications(), kNotificationsMaxCount));
  50   }
  51 }
  52
  53 bool GoogleNowNotificationStatsCollector::IsVisibleNotificationIdForGoogleNow(
  54     const std::string& notification_id) {
  55   bool isGoogleNowNotification = false;
  56   const message_center::Notification* const notification =
  57       message_center::MessageCenter::Get()->FindVisibleNotificationById(
  58           notification_id);
  59   if (notification) {
  60     isGoogleNowNotification =
  61         ((notification->notifier_id().type ==
  62               message_center::NotifierId::APPLICATION) &&
  63         (notification->notifier_id().id ==
  64               ExtensionWelcomeNotification::kChromeNowExtensionID));
  65   }
  66   return isGoogleNowNotification;
  67 }
  68
  69 int GoogleNowNotificationStatsCollector::CountVisibleGoogleNowNotifications() {
  70   typedef message_center::NotificationList::Notifications Notifications;
  71   const Notifications visible_notifications =
  72       message_center_->GetVisibleNotifications();
  73   int google_now_notification_count = 0;
  74   for (Notifications::iterator iter = visible_notifications.begin();
  75       iter != visible_notifications.end();
  76       ++iter) {
  77     if ((*iter)->notifier_id().id ==
  78             ExtensionWelcomeNotification::kChromeNowExtensionID)
  79       google_now_notification_count++;
  80   }
  81   return google_now_notification_count;
  82 }