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#pragma warning disable CS1591
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using MediaBrowser.Model.IO;
namespace MediaBrowser.Controller.Providers
{
public class DirectoryService : IDirectoryService
{
private readonly IFileSystem _fileSystem;
private readonly ConcurrentDictionary<string, FileSystemMetadata[]> _cache = new ConcurrentDictionary<string, FileSystemMetadata[]>(StringComparer.OrdinalIgnoreCase);
private readonly ConcurrentDictionary<string, FileSystemMetadata> _fileCache = new ConcurrentDictionary<string, FileSystemMetadata>(StringComparer.OrdinalIgnoreCase);
private readonly ConcurrentDictionary<string, List<string>> _filePathCache = new ConcurrentDictionary<string, List<string>>(StringComparer.OrdinalIgnoreCase);
public DirectoryService(IFileSystem fileSystem)
{
_fileSystem = fileSystem;
}
public FileSystemMetadata[] GetFileSystemEntries(string path)
{
return _cache.GetOrAdd(path, p => _fileSystem.GetFileSystemEntries(p).ToArray());
}
public List<FileSystemMetadata> GetFiles(string path)
{
var list = new List<FileSystemMetadata>();
var items = GetFileSystemEntries(path);
foreach (var item in items)
{
if (!item.IsDirectory)
{
list.Add(item);
}
}
return list;
}
public FileSystemMetadata GetFile(string path)
{
var result = _fileCache.GetOrAdd(path, p =>
{
var file = _fileSystem.GetFileInfo(p);
return file != null && file.Exists ? file : null;
});
if (result == null)
{
// lets not store null results in the cache
_fileCache.TryRemove(path, out _);
}
return result;
}
public IReadOnlyList<string> GetFilePaths(string path)
=> GetFilePaths(path, false);
public IReadOnlyList<string> GetFilePaths(string path, bool clearCache)
{
if (clearCache)
{
_filePathCache.TryRemove(path, out _);
}
return _filePathCache.GetOrAdd(path, p => _fileSystem.GetFilePaths(p).ToList());
}
}
}
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