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// Copyright (c) 2012 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_SYNC_DRIVER_SYNC_SERVICE_OBSERVER_H_
#define COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_OBSERVER_H_
namespace sync_driver {
// Various UI components such as the New Tab page can be driven by observing
// the SyncService through this interface.
class SyncServiceObserver {
public:
// When one of the following events occurs, OnStateChanged() is called.
// Observers should query the service to determine what happened.
// - We initialized successfully.
// - The sync servers are unavailable at this time.
// - Credentials are now in flight for authentication.
// - The data type configuration has started or ended.
// - Sync shut down.
// - Sync errors (passphrase, auth, unrecoverable, actionable, etc.).
// - Encryption changes.
virtual void OnStateChanged() = 0;
// If a client wishes to handle sync cycle completed events in a special way,
// they can use this function. By default, it re-routes to OnStateChanged().
virtual void OnSyncCycleCompleted();
protected:
virtual ~SyncServiceObserver() {}
};
} // namespace sync_driver
#endif // COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_OBSERVER_H_
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