components/drive/drive_notification_observer.h

// 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 COMPONENTS_DRIVE_DRIVE_NOTIFICATION_OBSERVER_H_
#define COMPONENTS_DRIVE_DRIVE_NOTIFICATION_OBSERVER_H_

#include <map>
#include <string>

namespace drive {

// Interface for classes which need to know when to check Google Drive for
// updates.
class DriveNotificationObserver {
 public:
  // Called when a notification from Google Drive is received. |invalidations|
  // is the map from objects that raised the notification to the changelist,
  // either a team drive id or empty string to represent the users default
  // corpus, to the change ID.
  virtual void OnNotificationReceived(
      const std::map<std::string, int64_t>& invalidations) = 0;

  // Called when there has not been a recent notification from Google Drive and
  // the timer used for polling Google Drive fired.
  virtual void OnNotificationTimerFired() = 0;

  // Called when XMPP-based push notification is enabled or disabled.
  virtual void OnPushNotificationEnabled(bool enabled) {}

 protected:
  virtual ~DriveNotificationObserver() = default;
};

}  // namespace drive

#endif  // COMPONENTS_DRIVE_DRIVE_NOTIFICATION_OBSERVER_H_