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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_SEGMENTATION_PLATFORM_INTERNAL_EXECUTION_PROCESSING_SQL_FEATURE_PROCESSOR_H_
#define COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_EXECUTION_PROCESSING_SQL_FEATURE_PROCESSOR_H_
#include <memory>
#include <vector>
#include "base/containers/flat_map.h"
#include "base/functional/callback_forward.h"
#include "components/segmentation_platform/internal/database/ukm_database.h"
#include "components/segmentation_platform/internal/execution/processing/query_processor.h"
#include "components/segmentation_platform/public/proto/model_metadata.pb.h"
namespace segmentation_platform::processing {
class CustomInputProcessor;
class FeatureProcessorState;
class InputDelegateHolder;
// SqlFeatureProcessor takes a list of SqlFeature type of input, fetches samples
// from the UKMDatabase, and computes an input tensor to use when executing the
// ML model.
class SqlFeatureProcessor : public QueryProcessor {
public:
using QueryList = base::flat_map<FeatureIndex, Data>;
SqlFeatureProcessor(QueryList&& queries,
base::Time prediction_time,
InputDelegateHolder* input_delegate_holder,
UkmDatabase* ukm_database);
~SqlFeatureProcessor() override;
// QueryProcessor implementation.
void Process(std::unique_ptr<FeatureProcessorState> feature_processor_state,
QueryProcessorCallback callback) override;
private:
using SqlFeatureAndBindValueIndices =
std::pair</*sql feature index*/ int, /*bind value index*/ int>;
// Callback method for when all relevant bind values have been processed.
void OnCustomInputProcessed(
std::unique_ptr<CustomInputProcessor> custom_input_processor,
std::unique_ptr<FeatureProcessorState> feature_processor_state,
base::flat_map<SqlFeatureAndBindValueIndices, Tensor> result);
// Callback method for when all queries have been processed by the ukm
// database.
void OnQueriesRun(
std::unique_ptr<FeatureProcessorState> feature_processor_state,
bool success,
IndexedTensors result);
// List of sql features to process into input tensors.
QueryList queries_;
// Time at which we expect the model execution to run.
const base::Time prediction_time_;
const raw_ptr<InputDelegateHolder> input_delegate_holder_;
// Main database for fetching data.
const raw_ptr<UkmDatabase> ukm_database_;
// Callback for sending the resulting indexed tensors to the feature list
// processor.
QueryProcessorCallback callback_;
bool is_processed_{false};
// List of sql queries and bind values ready to be sent to the ukm database
// for processing.
base::flat_map<FeatureIndex, UkmDatabase::CustomSqlQuery> processed_queries_;
// List of resulting input tensors.
IndexedTensors result_;
base::WeakPtrFactory<SqlFeatureProcessor> weak_ptr_factory_{this};
};
} // namespace segmentation_platform::processing
#endif // COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_EXECUTION_PROCESSING_SQL_FEATURE_PROCESSOR_H_
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