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using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Playlists;
using System;
using System.Collections.Generic;
using System.Linq;
namespace MediaBrowser.Server.Implementations.Library
{
public class MusicManager : IMusicManager
{
private readonly ILibraryManager _libraryManager;
public MusicManager(ILibraryManager libraryManager)
{
_libraryManager = libraryManager;
}
public IEnumerable<Audio> GetInstantMixFromSong(Audio item, User user)
{
var list = new List<Audio>
{
item
};
return list.Concat(GetInstantMixFromGenres(item.Genres, user));
}
public IEnumerable<Audio> GetInstantMixFromArtist(string name, User user)
{
var artist = _libraryManager.GetArtist(name);
var genres = user.RootFolder
.GetRecursiveChildren(user)
.OfType<Audio>()
.Where(i => i.HasArtist(name))
.SelectMany(i => i.Genres)
.Concat(artist.Genres)
.Distinct(StringComparer.OrdinalIgnoreCase);
return GetInstantMixFromGenres(genres, user);
}
public IEnumerable<Audio> GetInstantMixFromAlbum(MusicAlbum item, User user)
{
var genres = item
.GetRecursiveChildren(user, true)
.OfType<Audio>()
.SelectMany(i => i.Genres)
.Concat(item.Genres)
.Distinct(StringComparer.OrdinalIgnoreCase);
return GetInstantMixFromGenres(genres, user);
}
public IEnumerable<Audio> GetInstantMixFromPlaylist(Playlist item, User user)
{
var genres = item
.GetRecursiveChildren(user, true)
.OfType<Audio>()
.SelectMany(i => i.Genres)
.Concat(item.Genres)
.Distinct(StringComparer.OrdinalIgnoreCase);
return GetInstantMixFromGenres(genres, user);
}
public IEnumerable<Audio> GetInstantMixFromGenres(IEnumerable<string> genres, User user)
{
var inputItems = user.RootFolder.GetRecursiveChildren(user);
var genresDictionary = genres.ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
return inputItems
.OfType<Audio>()
.Select(i => new Tuple<Audio, int>(i, i.Genres.Count(genresDictionary.ContainsKey)))
.Where(i => i.Item2 > 0)
.OrderByDescending(i => i.Item2)
.ThenBy(i => Guid.NewGuid())
.Select(i => i.Item1)
.Take(100)
.OrderBy(i => Guid.NewGuid());
}
}
}
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