mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-09-07 03:48:06 +02:00
121 lines
3.3 KiB
C#
121 lines
3.3 KiB
C#
using MediaBrowser.Model.Logging;
|
|
using MediaBrowser.Model.Serialization;
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.IO;
|
|
using System.Linq;
|
|
using MediaBrowser.Common.IO;
|
|
|
|
namespace MediaBrowser.Server.Implementations.LiveTv.EmbyTV
|
|
{
|
|
public class ItemDataProvider<T>
|
|
where T : class
|
|
{
|
|
private readonly object _fileDataLock = new object();
|
|
private List<T> _items;
|
|
private readonly IJsonSerializer _jsonSerializer;
|
|
protected readonly ILogger Logger;
|
|
private readonly string _dataPath;
|
|
protected readonly Func<T, T, bool> EqualityComparer;
|
|
private readonly IFileSystem _fileSystem;
|
|
|
|
public ItemDataProvider(IFileSystem fileSystem, IJsonSerializer jsonSerializer, ILogger logger, string dataPath, Func<T, T, bool> equalityComparer)
|
|
{
|
|
Logger = logger;
|
|
_dataPath = dataPath;
|
|
EqualityComparer = equalityComparer;
|
|
_jsonSerializer = jsonSerializer;
|
|
_fileSystem = fileSystem;
|
|
}
|
|
|
|
public IReadOnlyList<T> GetAll()
|
|
{
|
|
if (_items == null)
|
|
{
|
|
lock (_fileDataLock)
|
|
{
|
|
if (_items == null)
|
|
{
|
|
_items = GetItemsFromFile(_dataPath);
|
|
}
|
|
}
|
|
}
|
|
return _items;
|
|
}
|
|
|
|
private List<T> GetItemsFromFile(string path)
|
|
{
|
|
var jsonFile = path + ".json";
|
|
|
|
try
|
|
{
|
|
return _jsonSerializer.DeserializeFromFile<List<T>>(jsonFile);
|
|
}
|
|
catch (FileNotFoundException)
|
|
{
|
|
}
|
|
catch (DirectoryNotFoundException ex)
|
|
{
|
|
}
|
|
catch (IOException ex)
|
|
{
|
|
Logger.ErrorException("Error deserializing {0}", ex, jsonFile);
|
|
throw;
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
Logger.ErrorException("Error deserializing {0}", ex, jsonFile);
|
|
}
|
|
return new List<T>();
|
|
}
|
|
|
|
private void UpdateList(List<T> newList)
|
|
{
|
|
var file = _dataPath + ".json";
|
|
_fileSystem.CreateDirectory(Path.GetDirectoryName(file));
|
|
|
|
lock (_fileDataLock)
|
|
{
|
|
_jsonSerializer.SerializeToFile(newList, file);
|
|
_items = newList;
|
|
}
|
|
}
|
|
|
|
public virtual void Update(T item)
|
|
{
|
|
var list = GetAll().ToList();
|
|
|
|
var index = list.FindIndex(i => EqualityComparer(i, item));
|
|
|
|
if (index == -1)
|
|
{
|
|
throw new ArgumentException("item not found");
|
|
}
|
|
|
|
list[index] = item;
|
|
|
|
UpdateList(list);
|
|
}
|
|
|
|
public virtual void Add(T item)
|
|
{
|
|
var list = GetAll().ToList();
|
|
|
|
if (list.Any(i => EqualityComparer(i, item)))
|
|
{
|
|
throw new ArgumentException("item already exists");
|
|
}
|
|
|
|
list.Add(item);
|
|
|
|
UpdateList(list);
|
|
}
|
|
|
|
public virtual void Delete(T item)
|
|
{
|
|
var list = GetAll().Where(i => !EqualityComparer(i, item)).ToList();
|
|
|
|
UpdateList(list);
|
|
}
|
|
}
|
|
}
|