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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_NTP_SNIPPETS_REMOTE_PREFETCHED_PAGES_TRACKER_IMPL_H_
#define COMPONENTS_NTP_SNIPPETS_REMOTE_PREFETCHED_PAGES_TRACKER_IMPL_H_
#include <map>
#include <set>
#include <string>
#include <vector>
#include "base/memory/weak_ptr.h"
#include "components/ntp_snippets/remote/prefetched_pages_tracker.h"
#include "components/offline_pages/core/offline_page_model.h"
#include "url/gurl.h"
namespace offline_pages {
struct OfflinePageItem;
}
namespace ntp_snippets {
// OfflinePageModel must outlive this class.
class PrefetchedPagesTrackerImpl
: public PrefetchedPagesTracker,
public offline_pages::OfflinePageModel::Observer {
public:
PrefetchedPagesTrackerImpl(
offline_pages::OfflinePageModel* offline_page_model);
~PrefetchedPagesTrackerImpl() override;
// PrefetchedPagesTracker implementation
bool IsInitialized() const override;
void Initialize(base::OnceCallback<void()> callback) override;
bool PrefetchedOfflinePageExists(const GURL& url) const override;
// OfflinePageModel::Observer implementation.
void OfflinePageModelLoaded(offline_pages::OfflinePageModel* model) override;
void OfflinePageAdded(
offline_pages::OfflinePageModel* model,
const offline_pages::OfflinePageItem& added_page) override;
void OfflinePageDeleted(
const offline_pages::OfflinePageModel::DeletedPageInfo& page_info)
override;
private:
void OfflinePagesLoaded(const std::vector<offline_pages::OfflinePageItem>&
all_prefetched_offline_pages);
void AddOfflinePage(const offline_pages::OfflinePageItem& offline_page_item);
bool initialized_;
offline_pages::OfflinePageModel* offline_page_model_;
// Mapping from an offline id to a URL for all currently known prefetched
// offline pages.
std::map<int64_t, GURL> offline_id_to_url_mapping_;
// The mapping above represented as a mapping from a URL to its count. It does
// not contain items with zero count.
std::map<GURL, int> prefetched_url_counts_;
std::vector<base::OnceCallback<void()>> initialization_completed_callbacks_;
base::WeakPtrFactory<PrefetchedPagesTrackerImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(PrefetchedPagesTrackerImpl);
};
} // namespace ntp_snippets
#endif // COMPONENTS_NTP_SNIPPETS_REMOTE_PREFETCHED_PAGES_TRACKER_IMPL_H_
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