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using System.Collections.Concurrent;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
namespace MediaBrowser.Controller.Providers
{
public interface IDirectoryService
{
List<FileSystemInfo> GetFileSystemEntries(string path);
IEnumerable<FileInfo> GetFiles(string path);
IEnumerable<DirectoryInfo> GetDirectories(string path);
FileInfo GetFile(string path);
DirectoryInfo GetDirectory(string path);
}
public class DirectoryService : IDirectoryService
{
private readonly ILogger _logger;
private readonly ConcurrentDictionary<string, List<FileSystemInfo>> _cache = new ConcurrentDictionary<string, List<FileSystemInfo>>(StringComparer.OrdinalIgnoreCase);
public DirectoryService(ILogger logger)
{
_logger = logger;
}
public List<FileSystemInfo> GetFileSystemEntries(string path)
{
List<FileSystemInfo> entries;
if (!_cache.TryGetValue(path, out entries))
{
//_logger.Debug("Getting files for " + path);
try
{
entries = new DirectoryInfo(path).EnumerateFileSystemInfos("*", SearchOption.TopDirectoryOnly).ToList();
}
catch (DirectoryNotFoundException)
{
entries = new List<FileSystemInfo>();
}
_cache.TryAdd(path, entries);
}
return entries;
}
public IEnumerable<FileInfo> GetFiles(string path)
{
return GetFileSystemEntries(path).OfType<FileInfo>();
}
public IEnumerable<DirectoryInfo> GetDirectories(string path)
{
return GetFileSystemEntries(path).OfType<DirectoryInfo>();
}
public FileInfo GetFile(string path)
{
var directory = Path.GetDirectoryName(path);
var filename = Path.GetFileName(path);
return GetFiles(directory).FirstOrDefault(i => string.Equals(i.Name, filename, StringComparison.OrdinalIgnoreCase));
}
public DirectoryInfo GetDirectory(string path)
{
var directory = Path.GetDirectoryName(path);
var name = Path.GetFileName(path);
return GetDirectories(directory).FirstOrDefault(i => string.Equals(i.Name, name, StringComparison.OrdinalIgnoreCase));
}
}
}
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