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// Copyright 2020 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/permissions/prediction_service/prediction_common.h"
#include <cmath>
#include "base/notreached.h"
#include "base/values.h"
#include "build/build_config.h"
#include "components/permissions/features.h"
namespace permissions {
float GetRoundedRatio(int numerator, int denominator) {
if (denominator == 0) {
return 0;
}
return roundf(numerator / kRoundToMultiplesOf / denominator) *
kRoundToMultiplesOf;
}
int GetRoundedRatioForUkm(int numerator, int denominator) {
return GetRoundedRatio(numerator, denominator) * 100;
}
int BucketizeValue(int count) {
for (const int bucket : kCountBuckets) {
if (count >= bucket) {
return bucket;
}
}
return 0;
}
ClientFeatures_Platform GetCurrentPlatformProto() {
#if BUILDFLAG(IS_WIN) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || \
BUILDFLAG(IS_MAC)
return permissions::ClientFeatures_Platform_PLATFORM_DESKTOP;
#elif BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_FUCHSIA)
return permissions::ClientFeatures_Platform_PLATFORM_MOBILE;
#else
return permissions::ClientFeatures_Platform_PLATFORM_UNSPECIFIED;
#endif
}
ClientFeatures_PlatformEnum GetCurrentPlatformEnumProto() {
#if BUILDFLAG(IS_WIN) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || \
BUILDFLAG(IS_MAC)
return permissions::ClientFeatures_PlatformEnum_PLATFORM_DESKTOP_V2;
#elif BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_FUCHSIA)
return permissions::ClientFeatures_PlatformEnum_PLATFORM_MOBILE_V2;
#else
return permissions::ClientFeatures_PlatformEnum_PLATFORM_UNSPECIFIED_V2;
#endif
}
ClientFeatures_Gesture ConvertToProtoGesture(
const permissions::PermissionRequestGestureType type) {
switch (type) {
case permissions::PermissionRequestGestureType::GESTURE:
return permissions::ClientFeatures_Gesture_GESTURE;
case permissions::PermissionRequestGestureType::NO_GESTURE:
return permissions::ClientFeatures_Gesture_NO_GESTURE;
case permissions::PermissionRequestGestureType::UNKNOWN:
return permissions::ClientFeatures_Gesture_GESTURE_UNSPECIFIED;
case permissions::PermissionRequestGestureType::NUM:
break;
}
NOTREACHED();
}
ClientFeatures_GestureEnum ConvertToProtoGestureEnum(
const permissions::PermissionRequestGestureType type) {
switch (type) {
case permissions::PermissionRequestGestureType::GESTURE:
return permissions::ClientFeatures_GestureEnum_GESTURE_V2;
case permissions::PermissionRequestGestureType::NO_GESTURE:
case permissions::PermissionRequestGestureType::UNKNOWN:
return permissions::ClientFeatures_GestureEnum_GESTURE_UNSPECIFIED_V2;
case permissions::PermissionRequestGestureType::NUM:
break;
}
NOTREACHED();
}
PermissionFeatures_Relevance ConvertToProtoRelevance(
const permissions::PermissionRequestRelevance relevance) {
switch (relevance) {
case permissions::PermissionRequestRelevance::kUnspecified:
return permissions::PermissionFeatures_Relevance_RELEVANCE_UNSPECIFIED;
case permissions::PermissionRequestRelevance::kVeryLow:
return permissions::PermissionFeatures_Relevance_RELEVANCE_VERY_LOW;
case permissions::PermissionRequestRelevance::kLow:
return permissions::PermissionFeatures_Relevance_RELEVANCE_LOW;
case permissions::PermissionRequestRelevance::kMedium:
return permissions::PermissionFeatures_Relevance_RELEVANCE_MEDIUM;
case permissions::PermissionRequestRelevance::kHigh:
return permissions::PermissionFeatures_Relevance_RELEVANCE_HIGH;
case permissions::PermissionRequestRelevance::kVeryHigh:
return permissions::PermissionFeatures_Relevance_RELEVANCE_VERY_HIGH;
}
NOTREACHED();
}
void FillInStatsFeatures(const PredictionRequestFeatures::ActionCounts& counts,
StatsFeatures* features) {
int total_counts = counts.total();
// Round to only 2 decimal places to help prevent fingerprinting.
features->set_avg_deny_rate(GetRoundedRatio(counts.denies, total_counts));
features->set_avg_dismiss_rate(
GetRoundedRatio(counts.dismissals, total_counts));
features->set_avg_grant_rate(GetRoundedRatio(counts.grants, total_counts));
features->set_avg_ignore_rate(GetRoundedRatio(counts.ignores, total_counts));
features->set_prompts_count(BucketizeValue(total_counts));
}
std::unique_ptr<GeneratePredictionsRequest> GetPredictionRequestProto(
const PredictionRequestFeatures& entity) {
auto proto_request = std::make_unique<GeneratePredictionsRequest>();
ClientFeatures* client_features = proto_request->mutable_client_features();
client_features->set_platform(GetCurrentPlatformProto());
client_features->set_gesture(ConvertToProtoGesture(entity.gesture));
client_features->set_platform_enum(GetCurrentPlatformEnumProto());
client_features->set_gesture_enum(ConvertToProtoGestureEnum(entity.gesture));
FillInStatsFeatures(entity.all_permission_counts,
client_features->mutable_client_stats());
PermissionFeatures* permission_features =
proto_request->mutable_permission_features()->Add();
FillInStatsFeatures(entity.requested_permission_counts,
permission_features->mutable_permission_stats());
if (base::FeatureList::IsEnabled(permissions::features::kPermissionsAIv1) ||
base::FeatureList::IsEnabled(permissions::features::kPermissionsAIv3)) {
permission_features->set_permission_relevance(
ConvertToProtoRelevance(entity.permission_relevance));
}
switch (entity.type) {
case RequestType::kNotifications:
permission_features->mutable_notification_permission()->Clear();
break;
case RequestType::kGeolocation:
permission_features->mutable_geolocation_permission()->Clear();
break;
default:
NOTREACHED()
<< "CPSS only supports notifications and geolocation at the moment.";
}
if (!entity.url.is_empty()) {
SiteFeatures* site_features = proto_request->mutable_site_features();
site_features->set_origin(entity.url.spec());
}
ClientFeatures_ExperimentConfig* experiment_config =
client_features->mutable_experiment_config();
experiment_config->set_experiment_id(static_cast<int>(entity.experiment_id));
return proto_request;
}
} // namespace permissions
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