jellyfin/MediaBrowser.Controller/Providers/DirectoryService.cs

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using MediaBrowser.Model.Logging;
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using System;
using System.Collections.Concurrent;
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using System.Collections.Generic;
using System.IO;
using System.Linq;
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using CommonIO;
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namespace MediaBrowser.Controller.Providers
{
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public class DirectoryService : IDirectoryService
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{
private readonly ILogger _logger;
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private readonly IFileSystem _fileSystem;
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private readonly ConcurrentDictionary<string, Dictionary<string, FileSystemMetadata>> _cache =
new ConcurrentDictionary<string, Dictionary<string, FileSystemMetadata>>(StringComparer.OrdinalIgnoreCase);
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private readonly ConcurrentDictionary<string, FileSystemMetadata> _fileCache =
new ConcurrentDictionary<string, FileSystemMetadata>(StringComparer.OrdinalIgnoreCase);
public DirectoryService(ILogger logger, IFileSystem fileSystem)
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{
_logger = logger;
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_fileSystem = fileSystem;
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}
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public DirectoryService(IFileSystem fileSystem)
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: this(new NullLogger(), fileSystem)
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{
}
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public IEnumerable<FileSystemMetadata> GetFileSystemEntries(string path)
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{
return GetFileSystemEntries(path, false);
}
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public Dictionary<string, FileSystemMetadata> GetFileSystemDictionary(string path)
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{
return GetFileSystemDictionary(path, false);
}
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private Dictionary<string, FileSystemMetadata> GetFileSystemDictionary(string path, bool clearCache)
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{
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if (string.IsNullOrWhiteSpace(path))
{
throw new ArgumentNullException("path");
}
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Dictionary<string, FileSystemMetadata> entries;
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if (clearCache)
{
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Dictionary<string, FileSystemMetadata> removed;
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_cache.TryRemove(path, out removed);
}
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if (!_cache.TryGetValue(path, out entries))
{
//_logger.Debug("Getting files for " + path);
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entries = new Dictionary<string, FileSystemMetadata>(StringComparer.OrdinalIgnoreCase);
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try
{
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// using EnumerateFileSystemInfos doesn't handle reparse points (symlinks)
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var list = _fileSystem.GetFileSystemEntries(path)
.ToList();
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// Seeing dupes on some users file system for some reason
foreach (var item in list)
{
entries[item.FullName] = item;
}
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}
catch (DirectoryNotFoundException)
{
}
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//var group = entries.ToLookup(i => Path.GetDirectoryName(i.FullName)).ToList();
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_cache.TryAdd(path, entries);
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}
return entries;
}
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private IEnumerable<FileSystemMetadata> GetFileSystemEntries(string path, bool clearCache)
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{
return GetFileSystemDictionary(path, clearCache).Values;
}
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public IEnumerable<FileSystemMetadata> GetFiles(string path)
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{
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return GetFiles(path, false);
}
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public IEnumerable<FileSystemMetadata> GetFiles(string path, bool clearCache)
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{
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return GetFileSystemEntries(path, clearCache).Where(i => !i.IsDirectory);
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}
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public FileSystemMetadata GetFile(string path)
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{
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FileSystemMetadata file;
if (!_fileCache.TryGetValue(path, out file))
{
file = _fileSystem.GetFileInfo(path);
if (file != null)
{
_fileCache.TryAdd(path, file);
}
}
return file;
//return _fileSystem.GetFileInfo(path);
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}
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public IEnumerable<FileSystemMetadata> GetDirectories(string path)
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{
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return GetFileSystemEntries(path, false).Where(i => i.IsDirectory);
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}
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}
}