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// Copyright 2024 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_PASSAGE_EMBEDDINGS_PASSAGE_EMBEDDER_MODEL_OBSERVER_H_
#define COMPONENTS_PASSAGE_EMBEDDINGS_PASSAGE_EMBEDDER_MODEL_OBSERVER_H_
#include "base/memory/raw_ptr.h"
#include "components/keyed_service/core/keyed_service.h"
#include "components/optimization_guide/core/delivery/optimization_target_model_observer.h"
namespace optimization_guide {
class OptimizationGuideModelProvider;
} // namespace optimization_guide
namespace passage_embeddings {
class PassageEmbeddingsServiceController;
// Observes updates to the embedder models and notifies
// `PassageEmbeddingsServiceController` to update the models.
class PassageEmbedderModelObserver
: public KeyedService,
public optimization_guide::OptimizationTargetModelObserver {
public:
// `model_provider` may be nullptr. If provided, it is guaranteed to
// outlive `this` since EmbedderServiceFactory depends on
// OptimizationGuideKeyedServiceFactory. `service_controller` is a singleton
// and never nullptr.
PassageEmbedderModelObserver(
optimization_guide::OptimizationGuideModelProvider* model_provider,
PassageEmbeddingsServiceController* service_controller,
bool experimental);
~PassageEmbedderModelObserver() override;
private:
// OptimizationTargetModelObserver:
void OnModelUpdated(
optimization_guide::proto::OptimizationTarget optimization_target,
base::optional_ref<const optimization_guide::ModelInfo> model_info)
override;
// The provider of the embeddings model.
// May be nullptr. Otherwise it is guaranteed to outlive `this`.
raw_ptr<optimization_guide::OptimizationGuideModelProvider> model_provider_;
// The controller used to interact with the PassageEmbeddingsService.
// It is a singleton and guaranteed not to be nullptr and to outlive `this`.
raw_ptr<PassageEmbeddingsServiceController> service_controller_;
// The model target being observed; may be experimental.
optimization_guide::proto::OptimizationTarget target_;
};
} // namespace passage_embeddings
#endif // COMPONENTS_PASSAGE_EMBEDDINGS_PASSAGE_EMBEDDER_MODEL_OBSERVER_H_
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