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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/cross_device_user_segment.h"
#include <array>
#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"
#include "ui/base/device_form_factor.h"
namespace segmentation_platform {
namespace {
// List of sub-segments for cross device segment.
enum class CrossDeviceUserBin {
kUnknown = 0,
kNoCrossDeviceUsage = 1,
kCrossDeviceMobile = 2,
kCrossDeviceDesktop = 3,
kCrossDeviceTablet = 4,
kCrossDeviceMobileAndDesktop = 5,
kCrossDeviceMobileAndTablet = 6,
kCrossDeviceDesktopAndTablet = 7,
kCrossDeviceAllDeviceTypes = 8,
kCrossDeviceOther = 9,
kMaxValue = kCrossDeviceOther
};
#define RANK(x) static_cast<int>(x)
using proto::SegmentId;
// Default parameters for cross device model.
constexpr int kModelVersion = 2;
constexpr SegmentId kCrossDeviceUserSegmentId =
SegmentId::CROSS_DEVICE_USER_SEGMENT;
constexpr int64_t kCrossDeviceUserSignalStorageLength = 28;
constexpr int64_t kCrossDeviceUserMinSignalCollectionLength = 1;
constexpr int kCrossDeviceUserSegmentSelectionTTLDays = 7;
// InputFeatures.
constexpr std::array<float, 1> kCrossDeviceFeatureDefaultValue{0};
constexpr std::array<MetadataWriter::UMAFeature, 4>
kCrossDeviceUserUMAFeatures = {
MetadataWriter::UMAFeature::FromValueHistogram(
"Sync.DeviceCount2",
28,
proto::Aggregation::LATEST_OR_DEFAULT,
kCrossDeviceFeatureDefaultValue.size(),
kCrossDeviceFeatureDefaultValue.data()),
MetadataWriter::UMAFeature::FromValueHistogram(
"Sync.DeviceCount2.Phone",
28,
proto::Aggregation::LATEST_OR_DEFAULT,
kCrossDeviceFeatureDefaultValue.size(),
kCrossDeviceFeatureDefaultValue.data()),
MetadataWriter::UMAFeature::FromValueHistogram(
"Sync.DeviceCount2.Desktop",
28,
proto::Aggregation::LATEST_OR_DEFAULT,
kCrossDeviceFeatureDefaultValue.size(),
kCrossDeviceFeatureDefaultValue.data()),
MetadataWriter::UMAFeature::FromValueHistogram(
"Sync.DeviceCount2.Tablet",
28,
proto::Aggregation::LATEST_OR_DEFAULT,
kCrossDeviceFeatureDefaultValue.size(),
kCrossDeviceFeatureDefaultValue.data())};
} // namespace
// static
std::unique_ptr<Config> CrossDeviceUserSegment::GetConfig() {
if (!base::FeatureList::IsEnabled(
features::kSegmentationPlatformCrossDeviceUser)) {
return nullptr;
}
auto config = std::make_unique<Config>();
config->segmentation_key = kCrossDeviceUserKey;
config->segmentation_uma_name = kCrossDeviceUserUmaName;
config->AddSegmentId(SegmentId::CROSS_DEVICE_USER_SEGMENT,
std::make_unique<CrossDeviceUserSegment>());
config->auto_execute_and_cache = true;
return config;
}
CrossDeviceUserSegment::CrossDeviceUserSegment()
: DefaultModelProvider(kCrossDeviceUserSegmentId) {}
std::unique_ptr<DefaultModelProvider::ModelConfig>
CrossDeviceUserSegment::GetModelConfig() {
proto::SegmentationModelMetadata chrome_start_metadata;
MetadataWriter writer(&chrome_start_metadata);
writer.SetDefaultSegmentationMetadataConfig(
kCrossDeviceUserMinSignalCollectionLength,
kCrossDeviceUserSignalStorageLength);
// Set features.
writer.AddUmaFeatures(kCrossDeviceUserUMAFeatures.data(),
kCrossDeviceUserUMAFeatures.size());
// Set OutputConfig.
writer.AddOutputConfigForBinnedClassifier(
/*bins=*/{{1, kNoCrossDeviceUsage},
{2, kCrossDeviceMobile},
{3, kCrossDeviceDesktop},
{4, kCrossDeviceTablet},
{5, kCrossDeviceMobileAndDesktop},
{6, kCrossDeviceMobileAndTablet},
{7, kCrossDeviceDesktopAndTablet},
{8, kCrossDeviceAllDeviceTypes},
{9, kCrossDeviceOther}},
/*underflow_label=*/kNoCrossDeviceUsage);
writer.AddPredictedResultTTLInOutputConfig(
/*top_label_to_ttl_list=*/{}, kCrossDeviceUserSegmentSelectionTTLDays,
/*time_unit=*/proto::TimeUnit::DAY);
return std::make_unique<ModelConfig>(std::move(chrome_start_metadata),
kModelVersion);
}
void CrossDeviceUserSegment::ExecuteModelWithInput(
const ModelProvider::Request& inputs,
ExecutionCallback callback) {
// Invalid inputs.
if (inputs.size() != kCrossDeviceUserUMAFeatures.size()) {
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), std::nullopt));
return;
}
CrossDeviceUserBin segment = CrossDeviceUserBin::kNoCrossDeviceUsage;
float phone_count = inputs[1];
float desktop_count = inputs[2];
float tablet_count = inputs[3];
// Check for current device type and subtract it from the device count
// calculation.
#if BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_MAC) || \
BUILDFLAG(IS_WIN)
desktop_count -= 1;
#elif BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS)
if (ui::GetDeviceFormFactor() == ui::DEVICE_FORM_FACTOR_TABLET) {
tablet_count -= 1;
} else {
phone_count -= 1;
}
#endif
const bool multi_device_active = inputs[0] >= 2;
const bool phone_active = phone_count >= 1;
const bool desktop_active = desktop_count >= 1;
const bool tablet_active = tablet_count >= 1;
if (multi_device_active) {
if (phone_active && desktop_active && tablet_active) {
segment = CrossDeviceUserBin::kCrossDeviceAllDeviceTypes;
} else if (phone_active && desktop_active) {
segment = CrossDeviceUserBin::kCrossDeviceMobileAndDesktop;
} else if (phone_active && tablet_active) {
segment = CrossDeviceUserBin::kCrossDeviceMobileAndTablet;
} else if (desktop_active && tablet_active) {
segment = CrossDeviceUserBin::kCrossDeviceDesktopAndTablet;
} else if (phone_active) {
segment = CrossDeviceUserBin::kCrossDeviceMobile;
} else if (desktop_active) {
segment = CrossDeviceUserBin::kCrossDeviceDesktop;
} else if (tablet_active) {
segment = CrossDeviceUserBin::kCrossDeviceTablet;
} else {
segment = CrossDeviceUserBin::kCrossDeviceOther;
}
} else {
segment = segment = CrossDeviceUserBin::kNoCrossDeviceUsage;
}
float result = RANK(segment);
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(std::move(callback), ModelProvider::Response(1, result)));
}
} // namespace segmentation_platform
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