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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 COMPONENTS_VISITED_URL_RANKING_INTERNAL_URL_GROUPING_GROUP_SUGGESTIONS_MANAGER_H_
#define COMPONENTS_VISITED_URL_RANKING_INTERNAL_URL_GROUPING_GROUP_SUGGESTIONS_MANAGER_H_
#include "base/containers/flat_set.h"
#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "components/visited_url_ranking/internal/url_grouping/group_suggestions_tracker.h"
#include "components/visited_url_ranking/internal/url_grouping/grouping_heuristics.h"
#include "components/visited_url_ranking/public/url_grouping/group_suggestions.h"
#include "components/visited_url_ranking/public/url_grouping/group_suggestions_delegate.h"
#include "components/visited_url_ranking/public/url_grouping/group_suggestions_service.h"
#include "components/visited_url_ranking/public/visited_url_ranking_service.h"
class PrefService;
namespace visited_url_ranking {
// Tracks and runs computation of suggestions.
class GroupSuggestionsManager {
public:
GroupSuggestionsManager(VisitedURLRankingService* visited_url_ranking_service,
PrefService* pref_service);
~GroupSuggestionsManager();
GroupSuggestionsManager(const GroupSuggestionsManager&) = delete;
GroupSuggestionsManager& operator=(const GroupSuggestionsManager&) = delete;
// Compute the suggestions based on latest events and tab state, called when
// new events were observed to try looking for suggestions.
void MaybeTriggerSuggestions(const GroupSuggestionsService::Scope& scope);
// Register and unregister delegate, see SuggestionsDelegate.
void RegisterDelegate(GroupSuggestionsDelegate* delegate,
const GroupSuggestionsService::Scope& scope);
void UnregisterDelegate(GroupSuggestionsDelegate* delegate);
void set_suggestion_computed_callback_for_testing(
base::RepeatingClosure callback) {
suggestion_computed_callback_ = std::move(callback);
}
void set_consecutive_computation_delay_for_testing(base::TimeDelta delay) {
consecutive_computation_delay_ = delay;
}
// Retrieves the last cached suggestions for the given scope.
// Does not clear the cache.
std::optional<CachedSuggestions> GetCachedSuggestions(
const GroupSuggestionsService::Scope& scope);
// Invalidates the cached suggestions in the tracker.
void InvalidateCache();
private:
friend class GroupSuggestionsManagerTest;
class GroupSuggestionComputer;
struct DelegateMetadata {
raw_ptr<GroupSuggestionsDelegate> delegate;
GroupSuggestionsService::Scope scope;
};
void OnFinishComputeSuggestions(const GroupSuggestionsService::Scope& scope,
GroupingHeuristics::SuggestionsResult result);
void ShowSuggestion(
const GroupSuggestionsService::Scope& scope,
GroupSuggestions suggestions,
const std::vector<scoped_refptr<segmentation_platform::InputContext>>&
inputs);
void OnSuggestionResult(
const GroupSuggestion& shown_suggestion,
const std::vector<scoped_refptr<segmentation_platform::InputContext>>&
inputs,
UserResponseMetadata user_response);
const raw_ptr<VisitedURLRankingService> visited_url_ranking_service_;
base::flat_map<GroupSuggestionsDelegate*, DelegateMetadata>
registered_delegates_;
base::TimeDelta consecutive_computation_delay_;
base::RepeatingClosure suggestion_computed_callback_;
std::unique_ptr<GroupSuggestionComputer> suggestion_computer_;
std::unique_ptr<GroupSuggestionsTracker> suggestion_tracker_;
base::Time last_computation_time_;
base::WeakPtrFactory<GroupSuggestionsManager> weak_ptr_factory_{this};
};
} // namespace visited_url_ranking
#endif // COMPONENTS_VISITED_URL_RANKING_INTERNAL_URL_GROUPING_GROUP_SUGGESTIONS_MANAGER_H_
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