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jellyfin/MediaBrowser.Controller/Entities/AggregateFolder.cs

69 lines
2.0 KiB

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
namespace MediaBrowser.Controller.Entities
{
/// <summary>
/// Specialized folder that can have items added to it's children by external entities.
/// Used for our RootFolder so plug-ins can add items.
/// </summary>
public class AggregateFolder : Folder
{
/// <summary>
/// The _virtual children
/// </summary>
private readonly ConcurrentBag<BaseItem> _virtualChildren = new ConcurrentBag<BaseItem>();
/// <summary>
/// Gets the virtual children.
/// </summary>
/// <value>The virtual children.</value>
public ConcurrentBag<BaseItem> VirtualChildren
{
get { return _virtualChildren; }
}
/// <summary>
/// Adds the virtual child.
/// </summary>
/// <param name="child">The child.</param>
/// <exception cref="System.ArgumentNullException"></exception>
public void AddVirtualChild(BaseItem child)
{
if (child == null)
{
throw new ArgumentNullException();
}
_virtualChildren.Add(child);
}
/// <summary>
/// Get the children of this folder from the actual file system
/// </summary>
/// <returns>IEnumerable{BaseItem}.</returns>
protected override IEnumerable<BaseItem> GetNonCachedChildren()
{
return base.GetNonCachedChildren().Concat(_virtualChildren);
}
/// <summary>
/// Finds the virtual child.
/// </summary>
/// <param name="id">The id.</param>
/// <returns>BaseItem.</returns>
/// <exception cref="System.ArgumentNullException">id</exception>
public BaseItem FindVirtualChild(Guid id)
{
if (id == Guid.Empty)
{
throw new ArgumentNullException("id");
}
return _virtualChildren.FirstOrDefault(i => i.Id == id);
}
}
}