| // 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: |
| // This enum is used in an UMA histogram. Hence the entries here shouldn't |
| // be deleted or re-ordered and new ones should be added to the end. |
| enum LoadStatus { |
| LOAD_SUCCEEDED, |
| STORE_INIT_FAILED, |
| STORE_LOAD_FAILED, |
| DATA_PARSING_FAILED, |
| |
| // NOTE: always keep this entry at the end. |
| LOAD_STATUS_COUNT |
| }; |
| |
| typedef base::Callback<void(LoadStatus, const std::vector<OfflinePageItem>&)> |
| LoadCallback; |
| typedef base::Callback<void(bool)> UpdateCallback; |
| typedef base::Callback<void(bool)> ResetCallback; |
| |
| OfflinePageMetadataStore(); |
| virtual ~OfflinePageMetadataStore(); |
| |
| // Get all of the offline pages from the store. |
| virtual void Load(const LoadCallback& callback) = 0; |
| |
| // Asynchronously adds or updates offline page metadata to the store. |
| // Result of the update is passed in callback. |
| virtual void AddOrUpdateOfflinePage(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 RemoveOfflinePages(const std::vector<int64>& bookmark_ids, |
| const UpdateCallback& callback) = 0; |
| |
| // Resets the store. |
| virtual void Reset(const ResetCallback& callback) = 0; |
| }; |
| |
| } // namespace offline_pages |
| |
| #endif // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_METADATA_STORE_H_ |