Move storage-related files from webkit/ to new top-level directory storage/

webkit/browser/fileapi/sandbox_directory_database.h

-// Copyright (c) 2012 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 WEBKIT_BROWSER_FILEAPI_SANDBOX_DIRECTORY_DATABASE_H_
-#define WEBKIT_BROWSER_FILEAPI_SANDBOX_DIRECTORY_DATABASE_H_
-
-#include <string>
-#include <vector>
-
-#include "base/files/file.h"
-#include "base/files/file_path.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/time/time.h"
-#include "webkit/browser/webkit_storage_browser_export.h"
-
-namespace content {
-class SandboxDirectoryDatabaseTest;
-}
-
-namespace tracked_objects {
-class Location;
-}
-
-namespace leveldb {
-class DB;
-class Env;
-class Status;
-class WriteBatch;
-}
-
-namespace fileapi {
-
-// This class WILL NOT protect you against producing directory loops, giving an
-// empty directory a backing data file, giving two files the same backing file,
-// or pointing to a nonexistent backing file.  It does no file IO other than
-// that involved with talking to its underlying database.  It does not create or
-// in any way touch real files; it only creates path entries in its database.
-
-// TODO(ericu): Safe mode, which does more checks such as the above on debug
-// builds.
-// TODO(ericu): Add a method that will give a unique filename for a data file.
-class WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE SandboxDirectoryDatabase {
- public:
-  typedef int64 FileId;
-
-  struct WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE FileInfo {
-    FileInfo();
-    ~FileInfo();
-
-    bool is_directory() const {
-      return data_path.empty();
-    }
-
-    FileId parent_id;
-    base::FilePath data_path;
-    base::FilePath::StringType name;
-    // This modification time is valid only for directories, not files, as
-    // FileWriter will get the files out of sync.
-    // For files, look at the modification time of the underlying data_path.
-    base::Time modification_time;
-  };
-
-  SandboxDirectoryDatabase(
-      const base::FilePath& filesystem_data_directory,
-      leveldb::Env* env_override);
-  ~SandboxDirectoryDatabase();
-
-  bool GetChildWithName(
-      FileId parent_id,
-      const base::FilePath::StringType& name,
-      FileId* child_id);
-  bool GetFileWithPath(const base::FilePath& path, FileId* file_id);
-  // ListChildren will succeed, returning 0 children, if parent_id doesn't
-  // exist.
-  bool ListChildren(FileId parent_id, std::vector<FileId>* children);
-  bool GetFileInfo(FileId file_id, FileInfo* info);
-  base::File::Error AddFileInfo(const FileInfo& info, FileId* file_id);
-  bool RemoveFileInfo(FileId file_id);
-  // This does a full update of the FileInfo, and is what you'd use for moves
-  // and renames.  If you just want to update the modification_time, use
-  // UpdateModificationTime.
-  bool UpdateFileInfo(FileId file_id, const FileInfo& info);
-  bool UpdateModificationTime(
-      FileId file_id, const base::Time& modification_time);
-  // This is used for an overwriting move of a file [not a directory] on top of
-  // another file [also not a directory]; we need to alter two files' info in a
-  // single transaction to avoid weird backing file references in the event of a
-  // partial failure.
-  bool OverwritingMoveFile(FileId src_file_id, FileId dest_file_id);
-
-  // This produces the series 0, 1, 2..., starting at 0 when the underlying
-  // filesystem is first created, and maintaining state across
-  // creation/destruction of SandboxDirectoryDatabase objects.
-  bool GetNextInteger(int64* next);
-
-  bool IsDirectory(FileId file_id);
-
-  // Returns true if the database looks consistent with local filesystem.
-  bool IsFileSystemConsistent();
-
-  static bool DestroyDatabase(const base::FilePath& path,
-                              leveldb::Env* env_override);
-
- private:
-  enum RecoveryOption {
-    DELETE_ON_CORRUPTION,
-    REPAIR_ON_CORRUPTION,
-    FAIL_ON_CORRUPTION,
-  };
-
-  friend class content::SandboxDirectoryDatabaseTest;
-  friend class ObfuscatedFileUtil;
-
-  bool Init(RecoveryOption recovery_option);
-  bool RepairDatabase(const std::string& db_path);
-  void ReportInitStatus(const leveldb::Status& status);
-  bool StoreDefaultValues();
-  bool GetLastFileId(FileId* file_id);
-  bool AddFileInfoHelper(
-      const FileInfo& info, FileId file_id, leveldb::WriteBatch* batch);
-  bool RemoveFileInfoHelper(FileId file_id, leveldb::WriteBatch* batch);
-  void HandleError(const tracked_objects::Location& from_here,
-                   const leveldb::Status& status);
-
-  const base::FilePath filesystem_data_directory_;
-  leveldb::Env* env_override_;
-  scoped_ptr<leveldb::DB> db_;
-  base::Time last_reported_time_;
-  DISALLOW_COPY_AND_ASSIGN(SandboxDirectoryDatabase);
-};
-
-}  // namespace fileapi
-
-#endif  // WEBKIT_BROWSER_FILEAPI_SANDBOX_DIRECTORY_DATABASE_H_