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// Copyright 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_GOOGLE_APIS_DRIVE_NOTIFICATION_MANAGER_H_
#define CHROME_BROWSER_GOOGLE_APIS_DRIVE_NOTIFICATION_MANAGER_H_
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/timer.h"
#include "chrome/browser/google_apis/drive_notification_observer.h"
#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
#include "sync/notifier/invalidation_handler.h"
class Profile;
class ProfileSyncService;
namespace google_apis {
// Informs observers when they should check Google Drive for updates.
// Conditions under which updates should be searched:
// 1. XMPP invalidation is received from Google Drive.
// 2. Polling timer counts down.
class DriveNotificationManager
: public ProfileKeyedService,
public syncer::InvalidationHandler {
public:
explicit DriveNotificationManager(Profile* profile);
virtual ~DriveNotificationManager();
// ProfileKeyedService override.
virtual void Shutdown() OVERRIDE;
// syncer::InvalidationHandler implementation.
virtual void OnInvalidatorStateChange(
syncer::InvalidatorState state) OVERRIDE;
virtual void OnIncomingInvalidation(
const syncer::ObjectIdInvalidationMap& invalidation_map) OVERRIDE;
void AddObserver(DriveNotificationObserver* observer);
void RemoveObserver(DriveNotificationObserver* observer);
// True when XMPP notification is currently enabled.
bool push_notification_enabled() const {
return push_notification_enabled_;
}
// True when XMPP notification has been registered.
bool push_notification_registered() const {
return push_notification_registered_;
}
private:
enum NotificationSource {
NOTIFICATION_XMPP,
NOTIFICATION_POLLING,
};
// Restarts the polling timer. Used for polling-based notification.
void RestartPollingTimer();
// Notifies the observers that it's time to check for updates.
// |source| indicates where the notification comes from.
void NotifyObserversToUpdate(NotificationSource source);
// Registers for Google Drive invalidation notifications through XMPP.
void RegisterDriveNotifications();
// Returns a string representation of NotificationSource.
static std::string NotificationSourceToString(NotificationSource source);
Profile* profile_;
ObserverList<DriveNotificationObserver> observers_;
// True when Drive File Sync Service is registered for Drive notifications.
bool push_notification_registered_;
// True if the XMPP-based push notification is currently enabled.
bool push_notification_enabled_;
// True once observers are notified for the first time.
bool observers_notified_;
// The timer is used for polling based notification. XMPP should usually be
// used but notification is done per polling when XMPP is not working.
base::Timer polling_timer_;
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<DriveNotificationManager> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(DriveNotificationManager);
};
} // namespace google_apis
#endif // CHROME_BROWSER_GOOGLE_APIS_DRIVE_NOTIFICATION_MANAGER_H_
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