| // 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_CORE_OFFLINE_PAGE_METADATA_STORE_H_ |
| #define COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_METADATA_STORE_H_ |
| |
| #include <stdint.h> |
| |
| #include <vector> |
| |
| #include "base/callback.h" |
| #include "components/offline_pages/core/offline_page_item.h" |
| #include "components/offline_pages/core/offline_store_types.h" |
| |
| namespace offline_pages { |
| |
| typedef StoreUpdateResult<OfflinePageItem> OfflinePagesUpdateResult; |
| |
| // 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(bool /* success */)> InitializeCallback; |
| typedef base::Callback<void(bool /* success */)> ResetCallback; |
| typedef base::Callback<void(const std::vector<OfflinePageItem>&)> |
| LoadCallback; |
| typedef base::Callback<void(ItemActionStatus)> AddCallback; |
| typedef base::Callback<void(std::unique_ptr<OfflinePagesUpdateResult>)> |
| UpdateCallback; |
| |
| virtual ~OfflinePageMetadataStore(){}; |
| |
| // Initializes the store. Should be called before any other methods. |
| virtual void Initialize(const InitializeCallback& callback) = 0; |
| |
| // Get all of the offline pages from the store. |
| virtual void GetOfflinePages(const LoadCallback& callback) = 0; |
| |
| // Asynchronously adds an offline page item metadata to the store. |
| virtual void AddOfflinePage(const OfflinePageItem& offline_page, |
| const AddCallback& callback) = 0; |
| |
| // Asynchronously updates a set of offline page items in the store. |
| virtual void UpdateOfflinePages(const std::vector<OfflinePageItem>& pages, |
| 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_t>& offline_ids, |
| const UpdateCallback& callback) = 0; |
| |
| // Resets the store. |
| virtual void Reset(const ResetCallback& callback) = 0; |
| |
| // Gets the store state. |
| virtual StoreState state() const = 0; |
| }; |
| |
| } // namespace offline_pages |
| |
| #endif // COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_METADATA_STORE_H_ |