Google Now Message Center Stats

chrome/browser/notifications/google_now_notification_stats_collector.cc

+// Copyright 2014 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.
+
+#include "chrome/browser/notifications/google_now_notification_stats_collector.h"
+
+#include <string>
+
+#include "base/metrics/sparse_histogram.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/notifications/notification.h"
+#include "chrome/browser/notifications/notification_ui_manager.h"
+#include "content/public/browser/user_metrics.h"
+#include "ui/message_center/notification.h"
+
+namespace {
+const char kChromeNowExtensionID[] = "pafkbggdmjlpgkdkcbjmhmfcdpncadgh";
+const int kNotificationsMaxCount = 20;
+}
+
+GoogleNowNotificationStatsCollector::GoogleNowNotificationStatsCollector(
+    message_center::MessageCenter* message_center)
+    : message_center_(message_center) {
+  message_center_->AddObserver(this);
+}
+
+GoogleNowNotificationStatsCollector::~GoogleNowNotificationStatsCollector() {
+  message_center_->RemoveObserver(this);
+}
+
+void GoogleNowNotificationStatsCollector::OnNotificationDisplayed(
+    const std::string& notification_id,
+    const message_center::DisplaySource source) {
+  if ((source == message_center::DISPLAY_SOURCE_POPUP) &&
+      IsNotificationIdForGoogleNow(notification_id)) {
+    content::RecordAction(
+        base::UserMetricsAction(
+            "GoogleNow.MessageCenter.NotificationPoppedUp"));
+  }
+}
+
+void GoogleNowNotificationStatsCollector::OnCenterVisibilityChanged(
+    message_center::Visibility visibility) {
+  if (visibility == message_center::VISIBILITY_MESSAGE_CENTER) {
+    UMA_HISTOGRAM_SPARSE_SLOWLY(
+        "GoogleNow.MessageCenter.Displayed.NotificationsVisible",
+        std::min(CountVisibleGoogleNowNotifications(), kNotificationsMaxCount));
+  }
+}
+
+bool GoogleNowNotificationStatsCollector::IsNotificationIdForGoogleNow(
+  const std::string& notification_id) {
+  bool isGoogleNowNotification = false;
+  const Notification* const notification =
+      g_browser_process->notification_ui_manager()->FindById(notification_id);
+  if (notification) {
+    isGoogleNowNotification =
+        ((notification->notifier_id().type ==
+              message_center::NotifierId::APPLICATION) &&
+        (notification->notifier_id().id == kChromeNowExtensionID));
+  }
+  return isGoogleNowNotification;
+}
+
+int GoogleNowNotificationStatsCollector::CountVisibleGoogleNowNotifications() {
+  typedef message_center::NotificationList::Notifications Notifications;
+  const Notifications visible_notifications =
+      message_center_->GetVisibleNotifications();
+  int google_now_notification_count = 0;
+  for (Notifications::iterator iter = visible_notifications.begin();
+      iter != visible_notifications.end();
+      ++iter) {
+    if ((*iter)->notifier_id().id == kChromeNowExtensionID)
+      google_now_notification_count++;
+  }
+  return google_now_notification_count;
+}