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// Copyright 2015 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_OFFLINE_PAGES_OFFLINE_PAGE_METADATA_STORE_H_
#define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_METADATA_STORE_H_
#include <vector>
#include "base/callback.h"
class GURL;
namespace offline_pages {
struct OfflinePageItem;
// OfflinePageMetadataStore keeps metadata for the offline pages.
// Ability to create multiple instances of the store as well as behavior of
// asynchronous operations when the object is being destroyed, before such
// operation finishes will depend on implementation. It should be possible to
// issue multiple asynchronous operations in parallel.
class OfflinePageMetadataStore {
public:
typedef base::Callback<void(bool, const std::vector<OfflinePageItem>&)>
LoadCallback;
typedef base::Callback<void(bool)> UpdateCallback;
OfflinePageMetadataStore();
virtual ~OfflinePageMetadataStore();
// Get all of the offline pages from the store.
virtual void Load(const LoadCallback& callback) = 0;
// Asynchronously adds offline page metadata to the store for a given URL.
// Result of the update is passed in callback.
virtual void AddOfflinePage(const OfflinePageItem& offline_page,
const UpdateCallback& callback) = 0;
// Asynchronously removes offline page metadata from the store.
// Result of the update is passed in callback.
virtual void RemoveOfflinePage(const GURL& page_url,
const UpdateCallback& callback) = 0;
};
} // namespace offline_pages
#endif // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_METADATA_STORE_H_
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