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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.
#ifndef CHROME_BROWSER_UI_WEBUI_TOP_CHROME_PROFILE_PRELOAD_CANDIDATE_SELECTOR_H_
#define CHROME_BROWSER_UI_WEBUI_TOP_CHROME_PROFILE_PRELOAD_CANDIDATE_SELECTOR_H_
#include <vector>
#include "base/memory/raw_ptr.h"
#include "chrome/browser/ui/webui/top_chrome/per_profile_webui_tracker.h"
#include "chrome/browser/ui/webui/top_chrome/preload_candidate_selector.h"
#include "url/gurl.h"
namespace webui {
// ProfilePreloadCandidateSelector selects a WebUI with the highest site
// engagement score that is not currently present under a profile. If all WebUIs
// have low engagement scores, the selector will not make a selection.
class ProfilePreloadCandidateSelector : public PreloadCandidateSelector {
public:
// This class uses a PerProfileWebUITracker to check the presence of WebUIs
// under a profile. URLs that are present will not be selected.
explicit ProfilePreloadCandidateSelector(
PerProfileWebUITracker* webui_tracker);
~ProfilePreloadCandidateSelector() override;
ProfilePreloadCandidateSelector(const ProfilePreloadCandidateSelector&) =
delete;
ProfilePreloadCandidateSelector& operator=(
const ProfilePreloadCandidateSelector&) = delete;
// PreloadCandidateSelector:
void Init(const std::vector<GURL>& preloadable_urls) override;
std::optional<GURL> GetURLToPreload(
const PreloadContext& context) const override;
void set_no_preload_if_most_engaged_url_is_background_for_testing(
bool value) {
no_preload_if_most_engaged_url_is_background_ = value;
}
private:
// The WebUI tracker should always outlive this class.
raw_ptr<PerProfileWebUITracker> webui_tracker_;
std::vector<GURL> preloadable_urls_;
// If true, the selector will not select a URL if the most engaged URL is
// already present in the background.
bool no_preload_if_most_engaged_url_is_background_;
};
} // namespace webui
#endif // CHROME_BROWSER_UI_WEBUI_TOP_CHROME_PROFILE_PRELOAD_CANDIDATE_SELECTOR_H_
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