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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_POWER_AUTO_SCREEN_BRIGHTNESS_MODEL_CONFIG_LOADER_IMPL_H_
#define CHROME_BROWSER_ASH_POWER_AUTO_SCREEN_BRIGHTNESS_MODEL_CONFIG_LOADER_IMPL_H_
#include <memory>
#include <string>
#include "base/files/file_path.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/sequence_checker.h"
#include "base/task/sequenced_task_runner.h"
#include "chrome/browser/ash/power/auto_screen_brightness/model_config.h"
#include "chrome/browser/ash/power/auto_screen_brightness/model_config_loader.h"
namespace ash {
namespace power {
namespace auto_screen_brightness {
// Real implementation of ModelConfigLoader. It reads model params from the disk
// first and then overrides certain fields from experiment flags (if available).
class ModelConfigLoaderImpl : public ModelConfigLoader {
public:
ModelConfigLoaderImpl();
ModelConfigLoaderImpl(const ModelConfigLoaderImpl&) = delete;
ModelConfigLoaderImpl& operator=(const ModelConfigLoaderImpl&) = delete;
~ModelConfigLoaderImpl() override;
// ModelConfigLoader overrides:
void AddObserver(ModelConfigLoader::Observer* observer) override;
void RemoveObserver(ModelConfigLoader::Observer* observer) override;
// Only used for testing so that we can supply a test/fake |model_params_path|
// and |blocking_task_runner|.
static std::unique_ptr<ModelConfigLoaderImpl> CreateForTesting(
const base::FilePath& model_params_path,
scoped_refptr<base::SequencedTaskRunner> blocking_task_runner);
private:
ModelConfigLoaderImpl(
const base::FilePath& model_params_path,
scoped_refptr<base::SequencedTaskRunner> blocking_task_runner,
bool is_testing);
// Reads params from the disk and then calls InitFromParams.
// Uses |model_params_path| if it's not empty. Otherwise uses predefined
// paths.
void Init(const base::FilePath& model_params_path);
// Overrides loaded model configs from experiment flags. It will call
// OnInitializationComplete after completion.
void InitFromParams();
void OnModelParamsLoadedFromDisk(const std::string& content);
// Notifies observers whether a valid model config exists. Called after we've
// attempted to read from the disk and override with experiment flags.
void OnInitializationComplete();
scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
bool is_testing_ = false;
base::ObserverList<ModelConfigLoaderImpl::Observer> observers_;
ModelConfig model_config_;
bool is_model_config_valid_ = false;
bool is_initialized_ = false;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<ModelConfigLoaderImpl> weak_ptr_factory_{this};
};
} // namespace auto_screen_brightness
} // namespace power
} // namespace ash
#endif // CHROME_BROWSER_ASH_POWER_AUTO_SCREEN_BRIGHTNESS_MODEL_CONFIG_LOADER_IMPL_H_
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