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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/segmentation_platform/internal/migration/binary_classifier_migration.h"
#include "components/segmentation_platform/internal/metadata/metadata_utils.h"
#include "components/segmentation_platform/internal/metadata/metadata_writer.h"
#include "components/segmentation_platform/public/proto/model_metadata.pb.h"
#include "components/segmentation_platform/public/proto/output_config.pb.h"
#include "components/segmentation_platform/public/proto/segmentation_platform.pb.h"
namespace segmentation_platform::pref_migration_utils {
namespace {
proto::OutputConfig CreateOutputConfigForBinaryClassifier(Config* config) {
DCHECK(config->segments.size() == 1);
proto::SegmentId segment_id = config->segments.begin()->first;
proto::SegmentationModelMetadata model_metadata;
MetadataWriter writer(&model_metadata);
writer.AddOutputConfigForBinaryClassifier(
/*threshold=*/0.5,
/*positive_label=*/config->GetSegmentUmaName(segment_id),
/*negative_label=*/"Other");
writer.AddPredictedResultTTLInOutputConfig(
/*top_label_to_ttl_list=*/{},
/*default_ttl=*/config->segment_selection_ttl / base::Days(1),
/*time_unit=*/proto::TimeUnit::DAY);
return model_metadata.output_config();
}
std::vector<float> PopulateModelScoresForBinaryClassifier(
Config* config,
const SelectedSegment& old_result) {
float model_score =
(config->segments.begin()->first == old_result.segment_id) ? 1 : 0;
return std::vector<float>(1, model_score);
}
} // namespace
proto::ClientResult CreateClientResultForBinaryClassifier(
Config* config,
const SelectedSegment& old_result) {
const proto::OutputConfig& output_config =
CreateOutputConfigForBinaryClassifier(config);
std::vector<float> model_scores =
PopulateModelScoresForBinaryClassifier(config, old_result);
proto::PredictionResult pred_result = metadata_utils::CreatePredictionResult(
model_scores, output_config, /*timestamp=*/base::Time::Now(),
/*model_version=*/1);
return metadata_utils::CreateClientResultFromPredResult(
pred_result, old_result.selection_time);
}
} // namespace segmentation_platform::pref_migration_utils
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