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// Copyright 2024 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/optimization_guide/core/model_execution/safety_checker.h"
#include "base/barrier_callback.h"
#include "base/memory/weak_ptr.h"
#include "components/optimization_guide/core/model_execution/multimodal_message.h"
#include "components/optimization_guide/core/model_execution/on_device_model_execution_proto_descriptors.h"
#include "components/optimization_guide/core/model_execution/safety_config.h"
#include "components/optimization_guide/core/optimization_guide_features.h"
namespace optimization_guide {
namespace {
proto::InternalOnDeviceModelExecutionInfo MakeTextSafetyExecutionLog(
const std::string& text,
const on_device_model::mojom::SafetyInfoPtr& safety_info,
bool is_unsafe) {
proto::InternalOnDeviceModelExecutionInfo ts_execution_info;
ts_execution_info.mutable_request()
->mutable_text_safety_model_request()
->set_text(text);
auto* ts_resp = ts_execution_info.mutable_response()
->mutable_text_safety_model_response();
*ts_resp->mutable_scores() = {safety_info->class_scores.begin(),
safety_info->class_scores.end()};
ts_resp->set_is_unsafe(is_unsafe);
if (safety_info->language) {
ts_resp->set_language_code(safety_info->language->code);
ts_resp->set_language_confidence(safety_info->language->reliability);
}
return ts_execution_info;
}
on_device_model::mojom::SafetyInfoPtr AsSafetyInfo(
on_device_model::mojom::LanguageDetectionResultPtr result) {
auto safety_info = on_device_model::mojom::SafetyInfo::New();
safety_info->language = std::move(result);
return safety_info;
}
SafetyChecker::Result FailToRunResult() {
SafetyChecker::Result result;
result.failed_to_run = true;
return result;
}
SafetyChecker::Result RequestCheckResult(
base::WeakPtr<SafetyChecker> checker,
int request_check_idx,
std::string check_input_text,
on_device_model::mojom::SafetyInfoPtr safety_info) {
if (!checker) {
return FailToRunResult();
}
SafetyChecker::Result result;
// Evaluate the check.
result.is_unsafe =
checker->safety_cfg().IsRequestUnsafe(request_check_idx, safety_info);
result.is_unsupported_language =
checker->safety_cfg().IsRequestUnsupportedLanguage(request_check_idx,
safety_info);
*result.logs.Add() = MakeTextSafetyExecutionLog(check_input_text, safety_info,
result.is_unsafe);
return result;
}
SafetyChecker::Result RawOutputCheckResult(
base::WeakPtr<SafetyChecker> checker,
std::string check_input_text,
ResponseCompleteness completeness,
on_device_model::mojom::SafetyInfoPtr safety_info) {
if (!checker) {
return FailToRunResult();
}
SafetyChecker::Result result;
// Evaluate the check.
result.is_unsafe = checker->safety_cfg().IsRawOutputUnsafe(safety_info);
result.is_unsupported_language =
checker->safety_cfg().IsRawOutputUnsupportedLanguage(completeness,
safety_info);
*result.logs.Add() = MakeTextSafetyExecutionLog(check_input_text, safety_info,
result.is_unsafe);
return result;
}
SafetyChecker::Result ResponseCheckResult(
base::WeakPtr<SafetyChecker> checker,
int request_check_idx,
std::string check_input_text,
ResponseCompleteness completeness,
on_device_model::mojom::SafetyInfoPtr safety_info) {
if (!checker) {
return FailToRunResult();
}
SafetyChecker::Result result;
// Evaluate the check.
result.is_unsafe =
checker->safety_cfg().IsResponseUnsafe(request_check_idx, safety_info);
result.is_unsupported_language =
checker->safety_cfg().IsResponseUnsupportedLanguage(
request_check_idx, completeness, safety_info);
*result.logs.Add() = MakeTextSafetyExecutionLog(check_input_text, safety_info,
result.is_unsafe);
return result;
}
} // namespace
TextSafetyClient::~TextSafetyClient() = default;
SafetyChecker::Result::Result() = default;
SafetyChecker::Result::Result(const Result&) = default;
SafetyChecker::Result::Result(Result&&) = default;
SafetyChecker::Result& SafetyChecker::Result::operator=(Result&&) = default;
SafetyChecker::Result::~Result() = default;
// static
SafetyChecker::Result SafetyChecker::Result::Merge(
std::vector<Result> results) {
Result merged;
for (Result& result : results) {
merged.failed_to_run |= result.failed_to_run;
merged.is_unsafe |= result.is_unsafe;
merged.is_unsupported_language |= result.is_unsupported_language;
merged.logs.MergeFrom(std::move(result.logs));
}
return merged;
}
SafetyChecker::SafetyChecker(base::WeakPtr<TextSafetyClient> client,
SafetyConfig safety_cfg)
: client_(std::move(client)),
safety_cfg_(std::move(safety_cfg)) {}
SafetyChecker::SafetyChecker(const SafetyChecker& orig)
: client_(orig.client_),
safety_cfg_(orig.safety_cfg_) {}
SafetyChecker::~SafetyChecker() = default;
void SafetyChecker::RunRequestChecks(const MultimodalMessage& request,
ResultCallback callback) {
int num_checks = safety_cfg_.NumRequestChecks();
if (num_checks == 0) {
std::move(callback).Run(SafetyChecker::Result{});
return;
}
auto& session = GetSession();
if (!session.is_bound()) {
std::move(callback).Run(FailToRunResult());
return;
}
auto merge_fn = base::BarrierCallback<Result>(
num_checks,
base::BindOnce(&SafetyChecker::Result::Merge).Then(std::move(callback)));
for (int idx = 0; idx < num_checks; idx++) {
auto check_input = safety_cfg_.GetRequestCheckInput(idx, request.read());
if (!check_input) {
merge_fn.Run(FailToRunResult());
continue;
}
auto text = check_input->ToString();
auto merge_result_fn =
base::BindOnce(&RequestCheckResult, weak_ptr_factory_.GetWeakPtr(), idx,
text)
.Then(merge_fn);
if (safety_cfg_.IsRequestCheckLanguageOnly(idx)) {
session->DetectLanguage(
text, base::BindOnce(&AsSafetyInfo).Then(std::move(merge_result_fn)));
} else {
session->ClassifyTextSafety(text, std::move(merge_result_fn));
}
}
}
void SafetyChecker::RunRawOutputCheck(const std::string& raw_output,
ResponseCompleteness completeness,
ResultCallback callback) {
if (!safety_cfg_.HasRawOutputCheck()) {
std::move(callback).Run(SafetyChecker::Result{});
return;
}
auto& session = GetSession();
if (!session.is_bound()) {
std::move(callback).Run(FailToRunResult());
return;
}
auto check_input = safety_cfg_.GetRawOutputCheckInput(raw_output);
if (!check_input) {
std::move(callback).Run(FailToRunResult());
return;
}
auto text = check_input->ToString();
session->ClassifyTextSafety(
text, base::BindOnce(&RawOutputCheckResult,
weak_ptr_factory_.GetWeakPtr(), text, completeness)
.Then(std::move(callback)));
}
void SafetyChecker::RunResponseChecks(const MultimodalMessage& request,
const proto::Any& response_as_any,
ResponseCompleteness completeness,
ResultCallback callback) {
int num_checks = safety_cfg_.NumResponseChecks();
if (num_checks == 0) {
std::move(callback).Run(SafetyChecker::Result{});
return;
}
auto& session = GetSession();
if (!session.is_bound()) {
std::move(callback).Run(FailToRunResult());
return;
}
auto response = GetProtoFromAny(response_as_any);
if (!response) {
std::move(callback).Run(FailToRunResult());
return;
}
auto merge_fn = base::BarrierCallback<Result>(
num_checks,
base::BindOnce(&SafetyChecker::Result::Merge).Then(std::move(callback)));
for (int idx = 0; idx < num_checks; idx++) {
auto check_input = safety_cfg_.GetResponseCheckInput(
idx, request.read(), MultimodalMessageReadView(*response));
if (!check_input) {
merge_fn.Run(FailToRunResult());
continue;
}
auto text = check_input->ToString();
auto merge_result_fn =
base::BindOnce(&ResponseCheckResult, weak_ptr_factory_.GetWeakPtr(),
idx, text, completeness)
.Then(merge_fn);
session->ClassifyTextSafety(text, std::move(merge_result_fn));
}
}
mojo::Remote<on_device_model::mojom::TextSafetySession>&
SafetyChecker::GetSession() {
if (session_ || !client_) {
return session_;
}
client_->StartSession(session_.BindNewPipeAndPassReceiver());
return session_;
}
} // namespace optimization_guide
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