// Copyright 2017 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_OPTIMIZATION_GUIDE_OPTIMIZATION_GUIDE_SERVICE_OBSERVER_H_
#define COMPONENTS_OPTIMIZATION_GUIDE_OPTIMIZATION_GUIDE_SERVICE_OBSERVER_H_

#include "base/version.h"
#include "components/optimization_guide/proto/hints.pb.h"

namespace optimization_guide {

// Encapsulates information about a version of optimization hints data received
// from the components server.
struct ComponentInfo {
  ComponentInfo(const base::Version& hints_version,
                const base::FilePath& hints_path);
  ~ComponentInfo();

  // The version of the hints content.
  const base::Version hints_version;

  // The path to the file containing the hints protobuf file.
  const base::FilePath hints_path;
};

// Interface for objects that wish to be notified of changes in the Optimization
// Guide Service.
//
// All calls will be made on the IO thread.
class OptimizationGuideServiceObserver {
 public:
  // Called when the hints have been processed.
  virtual void OnHintsProcessed(
      const proto::Configuration& config,
      const optimization_guide::ComponentInfo& component_info) = 0;

 protected:
  virtual ~OptimizationGuideServiceObserver() {}
};

}  // namespace optimization_guide

#endif  // COMPONENTS_OPTIMIZATION_GUIDE_OPTIMIZATION_GUIDE_SERVICE_OBSERVER_H_