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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.
#ifndef COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_SIGNALS_HISTORY_SERVICE_OBSERVER_H_
#define COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_SIGNALS_HISTORY_SERVICE_OBSERVER_H_
#include <optional>
#include "base/cancelable_callback.h"
#include "base/containers/flat_set.h"
#include "base/memory/raw_ptr.h"
#include "base/scoped_observation.h"
#include "base/time/time.h"
#include "components/history/core/browser/history_service.h"
#include "components/history/core/browser/history_service_observer.h"
#include "components/segmentation_platform/public/proto/segmentation_platform.pb.h"
namespace segmentation_platform {
class HistoryDelegateImpl;
class StorageService;
class UrlSignalHandler;
// Observes history service for visits.
class HistoryServiceObserver : public history::HistoryServiceObserver {
public:
HistoryServiceObserver(history::HistoryService* history_service,
StorageService* storage_service,
const std::string& profile_id,
base::RepeatingClosure models_refresh_callback);
// For tests.
HistoryServiceObserver();
~HistoryServiceObserver() override;
HistoryServiceObserver(const HistoryServiceObserver&) = delete;
HistoryServiceObserver& operator=(const HistoryServiceObserver&) = delete;
// history::HistoryServiceObserver impl:
void OnURLVisited(history::HistoryService* history_service,
const history::URLRow& url_row,
const history::VisitRow& new_visit) override;
void OnHistoryDeletions(history::HistoryService* history_service,
const history::DeletionInfo& deletion_info) override;
// Sets the list of segment IDs that are based on history data.
virtual void SetHistoryBasedSegments(
base::flat_set<proto::SegmentId> history_based_segments);
private:
void DeleteResultsForHistoryBasedSegments();
const raw_ptr<StorageService> storage_service_;
const raw_ptr<UrlSignalHandler> url_signal_handler_;
// List of segment IDs that depend on history data, that will be cleared when
// history is deleted.
std::optional<base::flat_set<proto::SegmentId>> history_based_segments_;
bool pending_deletion_based_on_history_based_segments_ = false;
base::RepeatingClosure models_refresh_callback_;
std::unique_ptr<base::CancelableOnceClosure> posted_model_refresh_task_;
const std::string profile_id_;
std::unique_ptr<HistoryDelegateImpl> history_delegate_;
base::ScopedObservation<history::HistoryService,
history::HistoryServiceObserver>
history_observation_{this};
};
} // namespace segmentation_platform
#endif // COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_SIGNALS_HISTORY_SERVICE_OBSERVER_H_
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