public override void Delete(FileNode file)
{
string folderPath = MapPath(GetFolderPath(file));
if (Directory.Exists(folderPath))
{
Directory.Delete(folderPath, true);
}
}
protected virtual string GetFolderPath(FileNode file, char separatorChar)
{
var hexadecimalId = file.Id.ToString("x16");
// Divide the ID into portions, so each folder has no more than 16^3 files
var idParts = _idSplitter.Match(hexadecimalId).Groups.Cast<Group>()
.SelectMany(g => g.Captures.Cast<Capture>()).Skip(1)
.Select(c => c.Value.TrimStart('0').PadLeft(1, '0')).ToArray();
return string.Join(new string(separatorChar, 1), idParts);
}
public override void Write(FileNode file, Stream input)
{
string folderPath = MapPath(GetFolderPath(file));
Directory.CreateDirectory(folderPath);
string filePath = MapPath(GetFilePath(file));
using (FileStream output = File.Create(filePath))
{
CopyStream(input, output);
}
}
protected virtual string GetFilePath(FileNode file, char separatorChar)
{
string folder = GetFolderPath(file, separatorChar);
return string.Format("{0}" + separatorChar + "{1}", folder, file.Filename);
}
public abstract void Write(FileNode file, Stream input);
public abstract Stream Read(FileNode file);
public abstract Uri GetUrl(FileNode file);
public abstract void Delete(FileNode file);
protected override string GetFolderPath(FileNode file, char separatorChar)
{
string folder = GetFolderPath(file, separatorChar);
return string.Format("{0}" + separatorChar + "{1}", "media", folder);
}
public override Stream Read(FileNode file)
{
string filePath = MapPath(GetFilePath(file));
return new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
}
public override Uri GetUrl(FileNode file)
{
return new Uri(string.Format("/{0}", GetFilePath(file, '/')), UriKind.Relative);
}
/// <remarks>
/// This helper is only relevant as we translate paths using
/// HostingEnvironment.MapPath. If we were talking directly to the file
/// system Path.DirectorySeparatorChar should be used.
/// </remarks>
private string GetFolderPath(FileNode file)
{
return GetFolderPath(file, '/');
}
