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// 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.
#ifndef COMPONENTS_SYNC_DRIVER_SYNC_ERROR_CONTROLLER_H_
#define COMPONENTS_SYNC_DRIVER_SYNC_ERROR_CONTROLLER_H_
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/observer_list.h"
#include "components/sync_driver/sync_service_observer.h"
namespace sync_driver {
class SyncService;
}
// Keep track of sync errors and expose them to observers in the UI.
class SyncErrorController : public sync_driver::SyncServiceObserver {
public:
// The observer class for SyncErrorController lets the controller notify
// observers when an error arises or changes.
class Observer {
public:
virtual ~Observer() {}
virtual void OnErrorChanged() = 0;
};
explicit SyncErrorController(sync_driver::SyncService* service);
~SyncErrorController() override;
// True if there exists an error worth elevating to the user.
bool HasError();
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// sync_driver::SyncServiceObserver:
void OnStateChanged() override;
private:
sync_driver::SyncService* service_;
base::ObserverList<Observer, true> observer_list_;
DISALLOW_COPY_AND_ASSIGN(SyncErrorController);
};
#endif // COMPONENTS_SYNC_DRIVER_SYNC_ERROR_CONTROLLER_H_
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