[Offline Pages] Implement OfflinePageStorageManager.

components/offline_pages/offline_page_model.h

 // 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_MODEL_H_
 #define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 22 matching lines @@
 class TimeDelta;
 }
 
 namespace offline_pages {
 
 static const char* const kBookmarkNamespace = "bookmark";
 static const int64_t kInvalidOfflineId = 0;
 
 struct ClientId;
 
+class ClientPolicyController;
 struct OfflinePageItem;
 class OfflinePageMetadataStore;
+class OfflinePageStorageManager;
 
 // Service for saving pages offline, storing the offline copy and metadata, and
 // retrieving them upon request.
 //
 // Example usage:
 //   class ArchiverImpl : public OfflinePageArchiver {
 //     // This is a class that knows how to create archiver
 //     void CreateArchiver(...) override;
 //     ...
 //   }
@@ skipping 113 matching lines @@
   // Marks that the offline page related to the passed |offline_id| has been
   // accessed. Its access info, including last access time and access count,
   // will be updated. Requires that the model is loaded.
   void MarkPageAccessed(int64_t offline_id);
 
   // Deletes an offline page related to the passed |offline_id|.
   void DeletePageByOfflineId(int64_t offline_id,
                              const DeletePageCallback& callback);
 
   // Deletes offline pages related to the passed |offline_ids|.
-  void DeletePagesByOfflineId(const std::vector<int64_t>& offline_ids,
-                              const DeletePageCallback& callback);
+  // Making virtual for test purposes.
+  virtual void DeletePagesByOfflineId(const std::vector<int64_t>& offline_ids,
+                                      const DeletePageCallback& callback);
 
   // Wipes out all the data by deleting all saved files and clearing the store.
   void ClearAll(const base::Closure& callback);
 
   // Deletes offline pages matching the URL predicate.
   void DeletePagesByURLPredicate(
       const base::Callback<bool(const GURL&)>& predicate,
       const DeletePageCallback& callback);
 
   // Returns true via callback if there are offline pages in the given
   // |name_space|.
   void HasPages(const std::string& name_space,
                 const HasPagesCallback& callback);
 
   // Returns via callback all GURLs in |urls| that are equal to the online URL
   // of any offline page.
   void CheckPagesExistOffline(const std::set<GURL>& urls,
                               const CheckPagesExistOfflineCallback& callback);
 
   // Gets all available offline pages.
-  void GetAllPages(const MultipleOfflinePageItemCallback& callback);
+  // Making virtual for test purposes.
+  virtual void GetAllPages(const MultipleOfflinePageItemCallback& callback);
 
   // Gets all offline ids where the offline page has the matching client id.
   void GetOfflineIdsForClientId(const ClientId& client_id,
                                 const MultipleOfflineIdCallback& callback);
 
   // Gets all offline ids where the offline page has the matching client id.
   // Requires that the model is loaded.  May not return matching IDs depending
   // on the internal state of the model.
   //
   // This function is deprecated.  Use |GetOfflineIdsForClientId| instead.
@@ skipping 39 matching lines @@
   // pages. Method is to be called after a page was saved or some pages are
   // deleted. In the latter case |reporting_after_delete| is set to true.
   // Caller is supposed to provide the current |total_space_bytes| on drive
   // where the pages are stored, as well as |free_space_bytes| after the
   // operation was taken. The method will report total size of all pages, and
   // percentage of size of pages as compared to total space and free space.
   void RecordStorageHistograms(int64_t total_space_bytes,
                                int64_t free_space_bytes,
                                bool reporting_after_delete);
 
+  // Returns the policy controller.
+  // Making virtual for test purposes.
+  virtual ClientPolicyController* GetPolicyController();
+
   // Methods for testing only:
   OfflinePageMetadataStore* GetStoreForTesting();
 
-  bool is_loaded() const { return is_loaded_; }
+  OfflinePageStorageManager* GetStorageManager();
+
+  // Making virtual for test purposes.
+  virtual bool is_loaded() const;
+
+ protected:
+  // Adding a protected constructor for testing-only purposes in
+  // offline_page_storage_manager_unittest.cc
+  OfflinePageModel();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(OfflinePageModelTest, MarkPageForDeletion);
 
   typedef ScopedVector<OfflinePageArchiver> PendingArchivers;
 
   // Callback for ensuring archive directory is created.
   void OnEnsureArchivesDirCreatedDone();
 
   void GetAllPagesAfterLoadDone(
@@ skipping 100 matching lines @@
   std::map<int64_t, OfflinePageItem> offline_pages_;
 
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
 
   // Pending archivers owned by this model.
   PendingArchivers pending_archivers_;
 
   // Delayed tasks that should be invoked after the loading is done.
   std::vector<base::Closure> delayed_tasks_;
 
+  // Controller of the client policies.
+  std::unique_ptr<ClientPolicyController> policy_controller_;
+
+  // Manager for the storage consumed by archives and responsible for
+  // automatic page clearing.
+  std::unique_ptr<OfflinePageStorageManager> storage_manager_;
+
   base::WeakPtrFactory<OfflinePageModel> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageModel);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_