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// Copyright 2014 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_INDEX_INTERFACE_H_
#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_INDEX_INTERFACE_H_
#include <string>
#include <vector>
#include "base/memory/scoped_ptr.h"
namespace sync_file_system {
namespace drive_backend {
class FileMetadata;
class FileTracker;
class TrackerIDSet;
struct ParentIDAndTitle {
int64 parent_id;
std::string title;
ParentIDAndTitle();
ParentIDAndTitle(int64 parent_id, const std::string& title);
};
bool operator==(const ParentIDAndTitle& left, const ParentIDAndTitle& right);
bool operator<(const ParentIDAndTitle& left, const ParentIDAndTitle& right);
// Interface class to maintain indexes of MetadataDatabase.
class MetadataDatabaseIndexInterface {
public:
MetadataDatabaseIndexInterface() {}
virtual ~MetadataDatabaseIndexInterface() {}
// Returns true if FileMetadata identified by |file_id| exists.
// If |metadata| is not NULL, the FileMetadata is copied to it.
virtual bool GetFileMetadata(
const std::string& file_id, FileMetadata* metadata) const = 0;
// Returns true if FileTracker identified by |tracker_id| exists.
// If |tracker| is not NULL, the FileTracker is copied to it.
virtual bool GetFileTracker(
int64 tracker_id, FileTracker* tracker) const = 0;
// Stores |metadata| and updates indexes.
// This overwrites existing FileMetadata for the same |file_id|.
virtual void StoreFileMetadata(scoped_ptr<FileMetadata> metadata) = 0;
// Stores |tracker| and updates indexes.
// This overwrites existing FileTracker for the same |tracker_id|.
virtual void StoreFileTracker(scoped_ptr<FileTracker> tracker) = 0;
// Removes FileMetadata identified by |file_id| from indexes.
virtual void RemoveFileMetadata(const std::string& file_id) = 0;
// Removes FileTracker identified by |tracker_id| from indexes.
virtual void RemoveFileTracker(int64 tracker_id) = 0;
// Returns a set of FileTracker that have |file_id| as its own.
virtual TrackerIDSet GetFileTrackerIDsByFileID(
const std::string& file_id) const = 0;
// Returns an app-root tracker identified by |app_id|. Returns 0 if not
// found.
virtual int64 GetAppRootTracker(const std::string& app_id) const = 0;
// Returns a set of FileTracker that have |parent_tracker_id| and |title|.
virtual TrackerIDSet GetFileTrackerIDsByParentAndTitle(
int64 parent_tracker_id,
const std::string& title) const = 0;
virtual std::vector<int64> GetFileTrackerIDsByParent(
int64 parent_tracker_id) const = 0;
// Returns the |file_id| of a file that has multiple trackers.
virtual std::string PickMultiTrackerFileID() const = 0;
// Returns a pair of |parent_tracker_id| and |title| that has multiple file
// at the path.
virtual ParentIDAndTitle PickMultiBackingFilePath() const = 0;
// Returns a FileTracker whose |dirty| is set and which isn't demoted.
// Returns 0 if not found.
virtual int64 PickDirtyTracker() const = 0;
// Demotes a dirty tracker.
virtual void DemoteDirtyTracker(int64 tracker_id) = 0;
virtual bool HasDemotedDirtyTracker() const = 0;
virtual bool IsDemotedDirtyTracker(int64 tracker_id) const = 0;
// Promotes single demoted dirty tracker to a normal dirty tracker.
virtual void PromoteDemotedDirtyTracker(int64 tracker_id) = 0;
// Promotes all demoted dirty trackers to normal dirty trackers.
// Returns true if any tracker was promoted.
virtual bool PromoteDemotedDirtyTrackers() = 0;
virtual size_t CountDirtyTracker() const = 0;
virtual size_t CountFileMetadata() const = 0;
virtual size_t CountFileTracker() const = 0;
virtual void SetSyncRootTrackerID(int64 sync_root_id) const = 0;
virtual void SetLargestChangeID(int64 largest_change_id) const = 0;
virtual void SetNextTrackerID(int64 next_tracker_id) const = 0;
virtual int64 GetSyncRootTrackerID() const = 0;
virtual int64 GetLargestChangeID() const = 0;
virtual int64 GetNextTrackerID() const = 0;
virtual std::vector<std::string> GetRegisteredAppIDs() const = 0;
virtual std::vector<int64> GetAllTrackerIDs() const = 0;
virtual std::vector<std::string> GetAllMetadataIDs() const = 0;
private:
DISALLOW_COPY_AND_ASSIGN(MetadataDatabaseIndexInterface);
};
} // namespace drive_backend
} // namespace sync_file_system
#endif // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_INDEX_INTERFACE_H_
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