Stats collector for message center.

chrome/browser/notifications/message_center_stats_collector.h

Index: chrome/browser/notifications/message_center_stats_collector.h
diff --git a/chrome/browser/notifications/message_center_stats_collector.h b/chrome/browser/notifications/message_center_stats_collector.h
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+// Copyright (c) 2013 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.
+
+#ifndef CHROME_BROWSER_NOTIFICATIONS_MESSAGE_CENTER_STATS_COLLECTOR_H_
+#define CHROME_BROWSER_NOTIFICATIONS_MESSAGE_CENTER_STATS_COLLECTOR_H_
+
+#include <set>
+#include <string>
+
+#include "ui/message_center/message_center.h"
+#include "ui/message_center/message_center_observer.h"
+#include "ui/message_center/message_center_types.h"
+
+namespace message_center {
+class MessageCenter;
+}
+
+// MessageCenterStatsCollector sends both raw and per-notification statistics
+// to the UMA servers, if the user has opted in.  It observes the message center
+// to gather its data.
+class MessageCenterStatsCollector
+    : public message_center::MessageCenterObserver {
+ public:
+  enum NotificationActionType {
+    NOTIFICATION_ACTION_UNKNOWN,
+    NOTIFICATION_ACTION_ADD,
+    NOTIFICATION_ACTION_UPDATE,
+    NOTIFICATION_ACTION_CLICK,
+    NOTIFICATION_ACTION_BUTTON_CLICK,
+    NOTIFICATION_ACTION_DISPLAY,
+    NOTIFICATION_ACTION_CLOSE_BY_USER,
+    NOTIFICATION_ACTION_CLOSE_BY_SYSTEM,
+    // NOTE: Add new action types only immediately above this line. Also,
+    // make sure the enum list in tools/histogram/histograms.xml is
+    // updated with any change in here.
+    NOTIFICATION_ACTION_COUNT
+  };
+
+  explicit MessageCenterStatsCollector(
+      message_center::MessageCenter* message_center);
+  virtual ~MessageCenterStatsCollector();
+
+ private:
+  // Represents the aggregate stats for each notification.
+  class NotificationStats {
+   public:
+    // Default constructor for map.
+    NotificationStats();
+
+    explicit NotificationStats(const std::string& id);
+    virtual ~NotificationStats();
+
+    // Called when we get an action from the message center.
+    void CollectAction(NotificationActionType type);
+
+    // Sends aggregate data to UMA.
+    void RecordAggregateStats();
+
+   private:
+    std::string id_;
+    bool actions_[NOTIFICATION_ACTION_COUNT];
+  };
+
+  // MessageCenterObserver
+  virtual void OnNotificationAdded(const std::string& notification_id) OVERRIDE;
+  virtual void OnNotificationRemoved(const std::string& notification_id,
+                                     bool by_user) OVERRIDE;
+  virtual void OnNotificationUpdated(
+      const std::string& notification_id) OVERRIDE;
+  virtual void OnNotificationClicked(
+      const std::string& notification_id) OVERRIDE;
+  virtual void OnNotificationButtonClicked(const std::string& notification_id,
+                                           int button_index) OVERRIDE;
+  virtual void OnNotificationDisplayed(
+      const std::string& notification_id) OVERRIDE;
+  virtual void OnCenterVisibilityChanged(
+      message_center::Visibility visibility) OVERRIDE;
+  virtual void OnQuietModeChanged(bool in_quiet_mode) OVERRIDE;
+
+  // Weak, global.
+  message_center::MessageCenter* message_center_;
+
+  typedef std::map<std::string,NotificationStats> StatsCollection;
+  StatsCollection stats_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessageCenterStatsCollector);
+};
+
+#endif  // CHROME_BROWSER_NOTIFICATIONS_MESSAGE_CENTER_STATS_COLLECTOR_H_