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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_HISTORY_EMBEDDINGS_ML_ANSWERER_H_
#define COMPONENTS_HISTORY_EMBEDDINGS_ML_ANSWERER_H_
#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "components/history_embeddings/answerer.h"
#include "components/history_embeddings/mock_answerer.h"
#include "components/optimization_guide/core/model_quality/model_quality_logs_uploader_service.h"
#include "components/optimization_guide/core/optimization_guide_model_executor.h"
namespace history_embeddings {
using optimization_guide::OptimizationGuideModelExecutor;
using optimization_guide::ModelQualityLogsUploaderService;
using Session = optimization_guide::OptimizationGuideModelExecutor::Session;
class MlAnswerer : public Answerer {
public:
explicit MlAnswerer(OptimizationGuideModelExecutor* model_executor,
ModelQualityLogsUploaderService* logs_uploader);
~MlAnswerer() override;
int64_t GetModelVersion() override;
void ComputeAnswer(std::string query,
Context context,
ComputeAnswerCallback callback) override;
private:
class SessionManager;
struct ModelInput;
// Start and add a session for the url and passages.
void StartAndAddSession(const std::string& query,
const std::string& url,
const std::vector<std::string>& passages,
std::unique_ptr<Session> session,
base::OnceCallback<void(int)> session_started);
// Guaranteed to outlive `this`, since
// `model_executor_` is owned by OptimizationGuideKeyedServiceFactory,
// which HistoryEmbeddingsServiceFactory depends on.
raw_ptr<OptimizationGuideModelExecutor> model_executor_;
base::WeakPtr<optimization_guide::ModelQualityLogsUploaderService>
logs_uploader_;
std::unique_ptr<SessionManager> session_manager_;
};
} // namespace history_embeddings
#endif // COMPONENTS_HISTORY_EMBEDDINGS_ML_ANSWERER_H_
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