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#pragma warning disable CS1591
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using MediaBrowser.Model.IO;
namespace MediaBrowser.Controller.Providers
{
public class DirectoryService : IDirectoryService
{
// TODO make static and switch to FastConcurrentLru.
private readonly ConcurrentDictionary<string, FileSystemMetadata[]> _cache = new(StringComparer.Ordinal);
private readonly ConcurrentDictionary<string, FileSystemMetadata> _fileCache = new(StringComparer.Ordinal);
private readonly ConcurrentDictionary<string, List<string>> _filePathCache = new(StringComparer.Ordinal);
private readonly IFileSystem _fileSystem;
public DirectoryService(IFileSystem fileSystem)
{
_fileSystem = fileSystem;
}
public FileSystemMetadata[] GetFileSystemEntries(string path)
{
return _cache.GetOrAdd(
path,
static (p, fileSystem) =>
{
try
{
return fileSystem.GetFileSystemEntries(p).ToArray();
}
catch (DirectoryNotFoundException)
{
return [];
}
},
_fileSystem);
}
public List<FileSystemMetadata> GetDirectories(string path)
{
var list = new List<FileSystemMetadata>();
var items = GetFileSystemEntries(path);
for (var i = 0; i < items.Length; i++)
{
var item = items[i];
if (item.IsDirectory)
{
list.Add(item);
}
}
return list;
}
public List<FileSystemMetadata> GetFiles(string path)
{
var list = new List<FileSystemMetadata>();
var items = GetFileSystemEntries(path);
for (var i = 0; i < items.Length; i++)
{
var item = items[i];
if (!item.IsDirectory)
{
list.Add(item);
}
}
return list;
}
public FileSystemMetadata? GetFile(string path)
{
var entry = GetFileSystemEntry(path);
return entry is not null && !entry.IsDirectory ? entry : null;
}
public FileSystemMetadata? GetDirectory(string path)
{
var entry = GetFileSystemEntry(path);
return entry is not null && entry.IsDirectory ? entry : null;
}
public FileSystemMetadata? GetFileSystemEntry(string path)
{
if (!_fileCache.TryGetValue(path, out var result))
{
var file = _fileSystem.GetFileSystemInfo(path);
if (file?.Exists ?? false)
{
result = file;
_fileCache.TryAdd(path, result);
}
}
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 _);
}
var filePaths = _filePathCache.GetOrAdd(
path,
static (p, fileSystem) =>
{
try
{
return fileSystem.GetFilePaths(p).OrderBy(x => x).ToList();
}
catch (DirectoryNotFoundException)
{
return [];
}
},
_fileSystem);
return filePaths;
}
public bool IsAccessible(string path)
{
return _fileSystem.GetFileSystemEntryPaths(path).Any();
}
}
}
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