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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_OPTIMIZATION_GUIDE_CORE_DELIVERY_PREDICTION_MODEL_OVERRIDE_H_
#define COMPONENTS_OPTIMIZATION_GUIDE_CORE_DELIVERY_PREDICTION_MODEL_OVERRIDE_H_
#include <cstddef>
#include <initializer_list>
#include <map>
#include <optional>
#include <string>
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "components/optimization_guide/proto/models.pb.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
namespace base {
class FilePath;
} // namespace base
namespace unzip::mojom {
class Unzipper;
} // namespace unzip::mojom
namespace unzip {
// TODO: crbug.com/421262905 - Avoid duplicating this alias.
using UnzipperFactory =
base::RepeatingCallback<mojo::PendingRemote<mojom::Unzipper>()>;
} // namespace unzip
namespace optimization_guide {
// Return the separator used in the model override switch.
std::string ModelOverrideSeparator();
// Holds command-line overrides for prediction models.
class PredictionModelOverrides {
public:
struct Entry {
public:
using BuiltCallback =
base::OnceCallback<void(std::unique_ptr<proto::PredictionModel>)>;
Entry(proto::OptimizationTarget target,
base::FilePath path,
std::optional<proto::Any> metadata = std::nullopt);
Entry(Entry&&);
~Entry();
// Attempts to parse the Entry into a |proto::PredictionModel|.
// Returns the result (or nullptr if there was an error) via `callback`.
// In the event of an error, check LOG(ERROR).
void BuildModel(const base::FilePath& base_model_dir,
unzip::UnzipperFactory unzipper_factory,
BuiltCallback callback) const;
proto::OptimizationTarget target() const { return target_; }
base::FilePath path() const { return path_; }
std::optional<proto::Any> metadata() const { return metadata_; }
private:
proto::OptimizationTarget target_;
// An absolute path to the model file.
base::FilePath path_;
// The provided metadata for the model.
std::optional<proto::Any> metadata_ = std::nullopt;
};
~PredictionModelOverrides();
PredictionModelOverrides(PredictionModelOverrides&&);
// Get the override entry for the given optimization target. Returns nullptr
// if there is no override for the given optimization target.
const Entry* Get(proto::OptimizationTarget optimization_target) const;
size_t size() const { return overrides_.size(); }
static PredictionModelOverrides ParseFromCommandLine(
base::CommandLine* command_line);
private:
explicit PredictionModelOverrides(std::vector<Entry> overrides);
std::map<proto::OptimizationTarget, Entry> overrides_;
};
} // namespace optimization_guide
#endif // COMPONENTS_OPTIMIZATION_GUIDE_CORE_DELIVERY_PREDICTION_MODEL_OVERRIDE_H_
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