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// Copyright 2021 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_PERMISSIONS_PREDICTION_SERVICE_PREDICTION_MODEL_HANDLER_H_
#define COMPONENTS_PERMISSIONS_PREDICTION_SERVICE_PREDICTION_MODEL_HANDLER_H_
#include "base/run_loop.h"
#include "components/optimization_guide/core/inference/model_executor.h"
#include "components/optimization_guide/core/inference/model_handler.h"
#include "components/optimization_guide/proto/models.pb.h"
#include "components/permissions/prediction_service/prediction_model_executor.h"
#include "components/permissions/prediction_service/prediction_model_metadata.pb.h"
#include "components/permissions/prediction_service/prediction_service_messages.pb.h"
namespace permissions {
class PredictionModelHandler : public optimization_guide::ModelHandler<
GeneratePredictionsResponse,
const PredictionModelExecutorInput&> {
public:
explicit PredictionModelHandler(
optimization_guide::OptimizationGuideModelProvider* model_provider,
optimization_guide::proto::OptimizationTarget optimization_target);
~PredictionModelHandler() override;
PredictionModelHandler(const PredictionModelHandler&) = delete;
PredictionModelHandler& operator=(const PredictionModelHandler&) = delete;
// optimization_guide::ModelHandler overrides.
void OnModelUpdated(
optimization_guide::proto::OptimizationTarget optimization_target,
base::optional_ref<const optimization_guide::ModelInfo> model_info)
override;
void WaitForModelLoadForTesting();
void ExecuteModelWithMetadata(
ExecutionCallback callback,
std::unique_ptr<GeneratePredictionsRequest> proto_request);
// Returns the holdback chance for the model if ModelAvailable().
std::optional<float> HoldBackProbability();
private:
base::RunLoop model_load_run_loop_;
std::unique_ptr<
optimization_guide::ModelExecutor<GeneratePredictionsResponse,
const PredictionModelExecutorInput&>>
GetExecutor();
std::optional<optimization_guide::proto::Any> GetModelHandshakeProto();
std::optional<WebPermissionPredictionsModelMetadata>
prediction_model_metadata_;
};
} // namespace permissions
#endif // COMPONENTS_PERMISSIONS_PREDICTION_SERVICE_PREDICTION_MODEL_HANDLER_H_
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