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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_ACTOR_TOOLS_TOOL_CONTROLLER_H_
#define CHROME_BROWSER_ACTOR_TOOLS_TOOL_CONTROLLER_H_
#include <memory>
#include "base/functional/callback.h"
#include "base/memory/raw_ref.h"
#include "base/memory/safe_ref.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/actor/aggregated_journal.h"
#include "chrome/browser/actor/task_id.h"
#include "chrome/browser/actor/tools/observation_delay_controller.h"
#include "chrome/common/actor.mojom-forward.h"
#include "components/optimization_guide/proto/features/common_quality_data.pb.h"
#include "content/public/browser/weak_document_ptr.h"
namespace actor {
class AggregatedJournal;
class Tool;
class ToolRequest;
// Entry point into actor tool usage. ToolController is a profile-scoped,
// ExecutionEngine-owned object. This class routes a tool use request to the
// appropriate browser tool or to a corresponding executor in the renderer for
// page-level tools.
class ToolController {
public:
using ResultCallback = base::OnceCallback<void(mojom::ActionResultPtr)>;
ToolController(TaskId task_id, AggregatedJournal& journal);
~ToolController();
ToolController(const ToolController&) = delete;
ToolController& operator=(const ToolController&) = delete;
// Invokes a tool action.
void Invoke(
const ToolRequest& request,
const optimization_guide::proto::AnnotatedPageContent* last_observation,
ResultCallback result_callback);
private:
// Called when the tool itself finishes its invocation.
void DidFinishToolInvoke(mojom::ActionResultPtr result);
// Call to clear the current tool invocation and return the given result to
// the initiator. Must only be called when a tool invocation is in-progress.
void CompleteToolRequest(mojom::ActionResultPtr result);
void ValidationComplete(mojom::ActionResultPtr result);
// This state is non-null whenever a tool invocation is in progress.
struct ActiveState {
ActiveState(
std::unique_ptr<Tool> tool,
ResultCallback completion_callback,
std::unique_ptr<AggregatedJournal::PendingAsyncEntry> journal_entry,
const optimization_guide::proto::AnnotatedPageContent*
last_observation);
~ActiveState();
ActiveState(const ActiveState&) = delete;
ActiveState& operator=(const ActiveState&) = delete;
// Both `tool` and `completion_callback` are guaranteed to be non-null while
// active_state_ is set.
std::unique_ptr<Tool> tool;
ResultCallback completion_callback;
std::unique_ptr<AggregatedJournal::PendingAsyncEntry> journal_entry;
raw_ptr<const optimization_guide::proto::AnnotatedPageContent>
last_observation;
};
std::optional<ActiveState> active_state_;
// Set while a tool invocation is in progress, delays invocation of the
// completion_callback until the page is ready for observation.
std::unique_ptr<ObservationDelayController> observation_delayer_;
TaskId task_id_;
base::SafeRef<AggregatedJournal> journal_;
base::WeakPtrFactory<ToolController> weak_ptr_factory_{this};
};
} // namespace actor
#endif // CHROME_BROWSER_ACTOR_TOOLS_TOOL_CONTROLLER_H_
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