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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_PERMISSIONS_PERMISSIONS_AIV1_HANDLER_H_
#define CHROME_BROWSER_PERMISSIONS_PERMISSIONS_AIV1_HANDLER_H_
#include "base/memory/raw_ptr.h"
#include "base/timer/timer.h"
#include "chrome/browser/optimization_guide/optimization_guide_keyed_service.h"
#include "chrome/browser/optimization_guide/optimization_guide_keyed_service_factory.h"
#include "components/optimization_guide/core/optimization_guide_model_executor.h"
#include "components/optimization_guide/proto/features/permissions_ai.pb.h"
#include "components/permissions/request_type.h"
namespace permissions {
// Handles all interactions with the Permissions AI on-device model.
class PermissionsAiv1Handler {
public:
explicit PermissionsAiv1Handler(
OptimizationGuideKeyedService* optimization_guide);
~PermissionsAiv1Handler();
PermissionsAiv1Handler(const PermissionsAiv1Handler&) = delete;
PermissionsAiv1Handler& operator=(const PermissionsAiv1Handler&) = delete;
// Asynchronously inquires the on-device model, if available. If necessary,
// the model download will be initiated.
// In general, if the model is not yet available for what ever reason the
// callback will get called immediately with std::nullopt.
void InquireAiOnDeviceModel(
std::string rendered_text,
RequestType request_type,
base::OnceCallback<
void(std::optional<optimization_guide::proto::PermissionsAiResponse>)>
callback);
void set_execution_timer_for_testing(
std::unique_ptr<base::OneShotTimer> execution_timer);
private:
class EvaluationTask;
// Returns true if previous inquiry to the on-device model is not finished
// yet.
bool IsModelExecutionInProgress();
// Called by `execution_timer_` if model execution time exceeds
// `kMaxExecutionTime` to prevent exorbitantly high execution times.
void CancelModelExecution();
// The underlying session provided by optimization guide component.
raw_ptr<OptimizationGuideKeyedService> optimization_guide_;
// Used to prevent exorbitant model execution times. Timer gets started when a
// model executor session is created successfully and the model is inquired.
// It calls a callback to stop that session if it takes longer than 5 seconds.
// Reset otherwise at the end of a successful inquiry in the session logic.
std::unique_ptr<base::OneShotTimer> execution_timer_;
std::unique_ptr<EvaluationTask> evaluation_task_;
base::WeakPtrFactory<PermissionsAiv1Handler> weak_ptr_factory_{this};
};
} // namespace permissions
#endif // CHROME_BROWSER_PERMISSIONS_PERMISSIONS_AIV1_HANDLER_H_
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