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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.
#include "components/segmentation_platform/embedder/default_model/feed_user_segment.h"
#include <array>
#include "base/metrics/field_trial_params.h"
#include "base/task/sequenced_task_runner.h"
#include "components/segmentation_platform/internal/metadata/metadata_writer.h"
#include "components/segmentation_platform/public/config.h"
#include "components/segmentation_platform/public/constants.h"
#include "components/segmentation_platform/public/features.h"
#include "components/segmentation_platform/public/model_provider.h"
#include "components/segmentation_platform/public/proto/model_metadata.pb.h"
namespace segmentation_platform {
namespace {
using proto::SegmentId;
// Default parameters for feed user model.
constexpr int kModelVersion = 2;
constexpr SegmentId kFeedUserSegmentId =
SegmentId::OPTIMIZATION_TARGET_SEGMENTATION_FEED_USER;
constexpr int64_t kFeedUserSignalStorageLength = 28;
constexpr int64_t kFeedUserMinSignalCollectionLength = 7;
constexpr int kFeedUserSegmentSelectionTTLDays = 14;
// InputFeatures.
// The enum values are based on feed::FeedEngagementType.
constexpr std::array<int32_t, 1> kFeedEngagementEngaged{0};
constexpr std::array<int32_t, 1> kFeedEngagementSimple{1};
constexpr std::array<int32_t, 1> kFeedEngagementInteracted{2};
constexpr std::array<int32_t, 1> kFeedEngagementScrolled{4};
constexpr std::array<MetadataWriter::UMAFeature, 11> kFeedUserUMAFeatures = {
MetadataWriter::UMAFeature::FromUserAction("MobileNTPMostVisited", 14),
MetadataWriter::UMAFeature::FromUserAction("MobileNewTabOpened", 14),
MetadataWriter::UMAFeature::FromUserAction("MobileNewTabShown", 14),
MetadataWriter::UMAFeature::FromUserAction("Home", 14),
MetadataWriter::UMAFeature::FromUserAction("MobileMenuRecentTabs", 14),
MetadataWriter::UMAFeature::FromUserAction("MobileMenuHistory", 14),
MetadataWriter::UMAFeature::FromUserAction("MobileTabReturnedToCurrentTab",
14),
MetadataWriter::UMAFeature::FromEnumHistogram(
"ContentSuggestions.Feed.EngagementType",
28,
kFeedEngagementEngaged.data(),
kFeedEngagementEngaged.size()),
MetadataWriter::UMAFeature::FromEnumHistogram(
"ContentSuggestions.Feed.EngagementType",
28,
kFeedEngagementSimple.data(),
kFeedEngagementSimple.size()),
MetadataWriter::UMAFeature::FromEnumHistogram(
"ContentSuggestions.Feed.EngagementType",
28,
kFeedEngagementInteracted.data(),
kFeedEngagementInteracted.size()),
MetadataWriter::UMAFeature::FromEnumHistogram(
"ContentSuggestions.Feed.EngagementType",
28,
kFeedEngagementScrolled.data(),
kFeedEngagementScrolled.size()),
};
std::unique_ptr<DefaultModelProvider> GetFeedUserSegmentDefautlModel() {
if (!base::GetFieldTrialParamByFeatureAsBool(
features::kSegmentationPlatformFeedSegmentFeature,
kDefaultModelEnabledParam, true)) {
return nullptr;
}
return std::make_unique<FeedUserSegment>();
}
} // namespace
// static
std::unique_ptr<Config> FeedUserSegment::GetConfig() {
if (!base::FeatureList::IsEnabled(
features::kSegmentationPlatformFeedSegmentFeature)) {
return nullptr;
}
auto config = std::make_unique<Config>();
config->segmentation_key = kFeedUserSegmentationKey;
config->segmentation_uma_name = kFeedUserSegmentUmaName;
config->AddSegmentId(SegmentId::OPTIMIZATION_TARGET_SEGMENTATION_FEED_USER,
GetFeedUserSegmentDefautlModel());
config->auto_execute_and_cache = true;
return config;
}
FeedUserSegment::FeedUserSegment() : DefaultModelProvider(kFeedUserSegmentId) {}
std::unique_ptr<DefaultModelProvider::ModelConfig>
FeedUserSegment::GetModelConfig() {
proto::SegmentationModelMetadata chrome_start_metadata;
MetadataWriter writer(&chrome_start_metadata);
writer.SetDefaultSegmentationMetadataConfig(
kFeedUserMinSignalCollectionLength, kFeedUserSignalStorageLength);
// Set features.
writer.AddUmaFeatures(kFeedUserUMAFeatures.data(),
kFeedUserUMAFeatures.size());
// Set OutputConfig.
writer.AddOutputConfigForBinaryClassifier(
/*threshold=*/0.5f, /*positive_label=*/
SegmentIdToHistogramVariant(kFeedUserSegmentId),
/*negative_label=*/kLegacyNegativeLabel);
writer.AddPredictedResultTTLInOutputConfig(
/*top_label_to_ttl_list=*/{}, kFeedUserSegmentSelectionTTLDays,
/*time_unit=*/proto::TimeUnit::DAY);
return std::make_unique<ModelConfig>(std::move(chrome_start_metadata),
kModelVersion);
}
void FeedUserSegment::ExecuteModelWithInput(
const ModelProvider::Request& inputs,
ExecutionCallback callback) {
// Invalid inputs.
if (inputs.size() != kFeedUserUMAFeatures.size()) {
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), std::nullopt));
return;
}
const bool feed_engaged = inputs[7] >= 2;
const bool feed_engaged_simple = inputs[8] >= 2;
const bool feed_interacted = inputs[9] >= 2;
const bool feed_scrolled = inputs[10] >= 2;
float result = 0;
if (feed_engaged || feed_engaged_simple || feed_interacted || feed_scrolled) {
result = 1;
}
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(std::move(callback), ModelProvider::Response(1, result)));
}
} // namespace segmentation_platform
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