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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_WEB_APPLICATIONS_VISITED_MANIFEST_MANAGER_H_
#define CHROME_BROWSER_WEB_APPLICATIONS_VISITED_MANIFEST_MANAGER_H_
#include "base/containers/lru_cache.h"
#include "base/feature_list.h"
#include "base/memory/raw_ptr.h"
#include "base/time/clock.h"
#include "base/time/default_clock.h"
#include "base/time/time.h"
#include "third_party/blink/public/mojom/manifest/manifest.mojom-forward.h"
#include "url/gurl.h"
namespace web_app {
BASE_DECLARE_FEATURE(kBlockMlPromotionInNestedPagesNoManifest);
// This class is used to track recently seen manifests. Currently this is
// limited only to manifest scopes, which are used to detect if a given url
// is in-scope a recently seen manifest entity. This class limits its history
// to `kMaxScopesToSave` items, which are evicted via the least-recently-used
// policy.
// Seeing a manifest scope AND detecting if a scope controls a url both 'update'
// that entry to be at the front of the LRU queue.
class VisitedManifestManager {
public:
static constexpr int kMaxScopesToSave = 100;
explicit VisitedManifestManager(
base::Clock* clock = base::DefaultClock::GetInstance());
~VisitedManifestManager();
// If true, then this will also update the scope entry to be at the front of
// the FIFO queue, and record a new time for use with `ClearSeenScopes`.
bool IsUrlControlledBySeenManifest(const GURL& url);
// Records that the given manifest has been seen now. Only scopes of manifests
// that specify a `start_url` will be saved, and the current time will be
// recorded for use with `ClearSeenScopes`. Called when a manifest scope is
// seen by the AppBannerManager.
void OnManifestSeen(const blink::mojom::Manifest& manifest);
// Clears scopes that have been recorded in the given time, to be called from
// the clear-browsing-data flow.
void ClearSeenScopes(const base::Time& begin_time,
const base::Time& end_time);
private:
base::LRUCache<GURL /*scope*/, base::Time /*last_seen_or_used*/>
recent_manifest_scopes_{kMaxScopesToSave};
raw_ptr<base::Clock> clock_;
};
} // namespace web_app
#endif // CHROME_BROWSER_WEB_APPLICATIONS_VISITED_MANIFEST_MANAGER_H_
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