[SyncFS] Delete old MetadataDatabase code

chrome/browser/sync_file_system/drive_backend/metadata_database.h

 // Copyright 2013 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 CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_
 
 #include <map>
 #include <string>
 
@@ skipping 18 matching lines @@
 namespace google_apis {
 class ChangeResource;
 class FileResource;
 class ResourceEntry;
 }
 
 namespace sync_file_system {
 namespace drive_backend {
 
 class ServiceMetadata;
-class DriveFileMetadata;
 struct DatabaseContents;
 
 // MetadataDatabase instance holds and maintains database and its indexes.  The
 // database holds metadata of the server-side files/folders as
 // DriveFileMetadata instances.
 // The term "file" includes files, folders and other resources on Drive.
 //
 // Files have following state:
 //   - Unknown file
 //     - Is initial state of the files, only file_id and parent_folder_id field
@@ skipping 16 matching lines @@
 //     - have an app-root as its parent folder, or
 //     - have an active folder as its parent.
 //   That is, all files must be reachable from sync-root via app-root folders
 //   and active folders.
 //
 //   - Any active folder must either:
 //     - have needs_folder_listing flag and dirty flag, or
 //     - have all children at the stored largest change id.
 //
 class MetadataDatabase {
- private:
-  struct FileIDComparator {
-    bool operator()(DriveFileMetadata* left, DriveFileMetadata* right) const;
-  };
-
  public:
-  typedef std::set<DriveFileMetadata*, FileIDComparator> FileSet;
-  typedef std::map<std::string, DriveFileMetadata*> FileByFileID;
-  typedef std::map<std::string, FileSet> FilesByParent;
-  typedef std::map<std::pair<std::string, std::string>, DriveFileMetadata*>
-      FileByParentAndTitle;
-  typedef std::map<std::string, DriveFileMetadata*> FileByAppID;
-
   typedef base::Callback<
       void(SyncStatusCode status, scoped_ptr<MetadataDatabase> instance)>
       CreateCallback;
 
   static void Create(base::SequencedTaskRunner* task_runner,
                      const base::FilePath& database_path,
                      const CreateCallback& callback);
   ~MetadataDatabase();
 
   int64 GetLargestChangeID() const;
@@ skipping 13 matching lines @@
   // Activates the folder associated to |app_id| to enable |app_id|.
   // Does nothing if |app_id| is already enabled.
   void EnableApp(const std::string& app_id,
                  const SyncStatusCallback& callback);
 
   // Unregisters the folder as the app-root for |app_id|.  If |app_id| does not
   // exist, does nothing.  The folder is left as an inactive normal folder.
   void UnregisterApp(const std::string& app_id,
                      const SyncStatusCallback& callback);
 
-  // Finds the app-root folder for |app_id|.  Returns true if exists.
-  // Copies the result to |folder| if it is non-NULL.
-  bool FindAppRootFolder(const std::string& app_id,
-                         DriveFileMetadata* folder) const;
-
-  // Finds file by |file_id|.  Returns true if the file was found.
-  // Copies the DriveFileMetadata instance identified by |file_id| into
-  // |file| if exists and |file| is non-NULL.
-  bool FindFileByFileID(const std::string& file_id,
-                        DriveFileMetadata* file) const;
-
-  // Finds files by |title| under the folder identified by |folder_id|, and
-  // returns the number of the files.
-  // Copies the DriveFileMetadata instances to |files| if it is non-NULL.
-  size_t FindFilesByParentAndTitle(
-      const std::string& folder_id,
-      const std::string& title,
-      ScopedVector<DriveFileMetadata>* files) const;
-
-  // Finds active file by |title| under the folder identified by |folder_id|.
-  // Returns true if the file exists.
-  bool FindActiveFileByParentAndTitle(
-      const std::string& folder_id,
-      const std::string& title,
-      DriveFileMetadata* file) const;
-
-  // Finds the active file identified by |app_id| and |path|, which must be
-  // unique.  Returns true if the file was found.
-  // Copies the DriveFileMetadata instance into |file| if the file is found and
-  // |file| is non-NULL.
-  // |path| must be an absolute path in |app_id|. (i.e. relative to the app-root
-  // folder.)
-  bool FindActiveFileByPath(const std::string& app_id,
-                            const base::FilePath& path,
-                            DriveFileMetadata* file) const;
-
-  // Looks up FilePath from FileID.  Returns true on success.
-  // |path| must be non-NULL.
-  bool BuildPathForFile(const std::string& file_id,
-                        base::FilePath* path) const;
-
   // Updates database by |changes|.
   // Marks dirty for each changed file if the file has the metadata in the
   // database.  Adds new metadata to track the file if the file doesn't have
   // the metadata and its parent folder has the active metadata.
   void UpdateByChangeList(ScopedVector<google_apis::ChangeResource> changes,
                           const SyncStatusCallback& callback);
 
-  // Populates |folder| with |children|.  Each |children| initially has empty
-  // |synced_details| and |remote_details|.
-  void PopulateFolder(const std::string& folder_id,
-                      ScopedVector<google_apis::ResourceEntry> children,
-                      const SyncStatusCallback& callback);
-
  private:
   friend class MetadataDatabaseTest;
 
   explicit MetadataDatabase(base::SequencedTaskRunner* task_runner);
   static void CreateOnTaskRunner(base::SingleThreadTaskRunner* callback_runner,
                                  base::SequencedTaskRunner* task_runner,
                                  const base::FilePath& database_path,
                                  const CreateCallback& callback);
   static SyncStatusCode CreateForTesting(
       scoped_ptr<leveldb::DB> db,
       scoped_ptr<MetadataDatabase>* metadata_database_out);
   SyncStatusCode InitializeOnTaskRunner(const base::FilePath& database_path);
   void BuildIndexes(DatabaseContents* contents);
 
-  // Database manipulation methods.
-  void RegisterFolderAsAppRoot(const std::string& app_id,
-                               const std::string& folder,
-                               leveldb::WriteBatch* batch);
-  void MakeFileActive(const std::string& file_id,
-                      leveldb::WriteBatch* batch);
-  void MakeFileInactive(const std::string& file_id,
-                        leveldb::WriteBatch* batch);
-  void UnregisterFolderAsAppRoot(const std::string& app_id,
-                                 leveldb::WriteBatch* batch);
-  void RemoveFile(const std::string& file_id,
-                  leveldb::WriteBatch* batch);
-  void UpdateRemoteDetails(int64 change_id,
-                           const std::string& file_id,
-                           const google_apis::FileResource* file,
-                           leveldb::WriteBatch* batch);
-  void RegisterNewFile(int64 change_id,
-                       const DriveFileMetadata& parent_folder,
-                       const google_apis::FileResource& new_file,
-                       leveldb::WriteBatch* batch);
-
   void WriteToDatabase(scoped_ptr<leveldb::WriteBatch> batch,
                        const SyncStatusCallback& callback);
 
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   scoped_ptr<leveldb::DB> db_;
 
   scoped_ptr<ServiceMetadata> service_metadata_;
-  FileByFileID file_by_file_id_;  // Owned.
-
-  FilesByParent files_by_parent_;  // Not owned.
-  FileByAppID app_root_by_app_id_;  // Not owned.
-  FileByParentAndTitle active_file_by_parent_and_title_;  // Not owned.
-  FileSet dirty_files_;  // Not owned.
 
   base::WeakPtrFactory<MetadataDatabase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MetadataDatabase);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_