jellyfin/Emby.Server.Implementations/Sorting/AlbumArtistComparer.cs

43 lines
1.4 KiB
C#

using System;
using Jellyfin.Data.Enums;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.Sorting;
using MediaBrowser.Model.Querying;
namespace Emby.Server.Implementations.Sorting
{
/// <summary>
/// Allows comparing artists of albums. Only the first artist of each album is considered.
/// </summary>
public class AlbumArtistComparer : IBaseItemComparer
{
/// <summary>
/// Gets the item type this comparer compares.
/// </summary>
public ItemSortBy Type => ItemSortBy.AlbumArtist;
/// <summary>
/// Compares the specified arguments on their primary artist.
/// </summary>
/// <param name="x">First item to compare.</param>
/// <param name="y">Second item to compare.</param>
/// <returns>Zero if equal, else negative or positive number to indicate order.</returns>
public int Compare(BaseItem? x, BaseItem? y)
{
return string.Compare(GetFirstAlbumArtist(x), GetFirstAlbumArtist(y), StringComparison.OrdinalIgnoreCase);
}
private static string? GetFirstAlbumArtist(BaseItem? x)
{
if (x is IHasAlbumArtist audio
&& audio.AlbumArtists.Count != 0)
{
return audio.AlbumArtists[0];
}
return null;
}
}
}