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#region Disclaimer / License
// Copyright (C) 2011, Kenneth Skovhede
// http://www.hexad.dk, opensource@hexad.dk
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
#endregion
using System;
using System.Collections.Generic;
using System.IO;
namespace Duplicati.Library.Snapshots
{
/// <summary>
/// An interface for a snapshot implementation
/// </summary>
public interface ISnapshotService : IDisposable
{
/// <summary>
/// Enumerates all files and folders in the snapshot
/// </summary>
/// <param name="callback">The callback to invoke with each found path</param>
IEnumerable<string> EnumerateFilesAndFolders(Duplicati.Library.Utility.Utility.EnumerationFilterDelegate callback);
/// <summary>
/// Gets the last write time of a given file in UTC
/// </summary>
/// <param name="file">The full path to the file in non-snapshot format</param>
/// <returns>The last write time of the file</returns>
DateTime GetLastWriteTimeUtc(string file);
/// <summary>
/// Gets the last write time of a given file in UTC
/// </summary>
/// <param name="file">The full path to the file in non-snapshot format</param>
/// <returns>The last write time of the file</returns>
DateTime GetCreationTimeUtc(string file);
/// <summary>
/// Opens a file for reading
/// </summary>
/// <param name="file">The full path to the file in non-snapshot format</param>
/// <returns>An open filestream that can be read and seeked</returns>
Stream OpenRead(string file);
/// <summary>
/// Returns the size of a file
/// </summary>
/// <param name="file">The full path to the file in non-snapshot format</param>
/// <returns>The lenth of the file</returns>
long GetFileSize(string file);
/// <summary>
/// Returns the symlink target if the entry is a symlink, and null otherwise
/// </summary>
/// <param name="file">The file or folder to examine</param>
/// <returns>The symlink target</returns>
string GetSymlinkTarget(string file);
/// <summary>
/// Gets the attributes for the given file or folder
/// </summary>
/// <returns>The file attributes</returns>
/// <param name="file">The file or folder to examine</param>
System.IO.FileAttributes GetAttributes(string file);
/// <summary>
/// Gets the metadata for the given file or folder
/// </summary>
/// <returns>The metadata for the given file or folder</returns>
/// <param name="file">The file or folder to examine</param>
Dictionary<string, string> GetMetadata(string file);
/// <summary>
/// Gets a value indicating if the path points to a block device
/// </summary>
/// <returns><c>true</c> if this instance is a block device; otherwise, <c>false</c>.</returns>
/// <param name="file">The file or folder to examine</param>
bool IsBlockDevice(string file);
/// <summary>
/// Gets a unique hardlink target ID
/// </summary>
/// <returns>The hardlink ID</returns>
/// <param name="file">The file or folder to examine</param>
string HardlinkTargetID(string path);
}
}
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