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using MediaBrowser.Controller.Dto;
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using MediaBrowser.Controller.Entities.Audio;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Persistence;
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using MediaBrowser.Model.Querying;
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using ServiceStack.ServiceHost;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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namespace MediaBrowser.Api
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{
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[Route("/Songs/{Id}/InstantMix", "GET")]
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[Api(Description = "Creates an instant playlist based on a given song")]
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public class GetInstantMixFromSong : BaseGetSimilarItemsFromItem
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{
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}
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[Route("/Albums/{Id}/InstantMix", "GET")]
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[Api(Description = "Creates an instant playlist based on a given album")]
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public class GetInstantMixFromAlbum : BaseGetSimilarItemsFromItem
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{
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}
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[Route("/Artists/{Name}/InstantMix", "GET")]
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[Api(Description = "Creates an instant playlist based on a given artist")]
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public class GetInstantMixFromArtist : BaseGetSimilarItems
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{
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[ApiMember(Name = "Name", Description = "The artist name", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "GET")]
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public string Name { get; set; }
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}
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[Route("/MusicGenres/{Name}/InstantMix", "GET")]
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[Api(Description = "Creates an instant playlist based on a music genre")]
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public class GetInstantMixFromMusicGenre : BaseGetSimilarItems
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{
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[ApiMember(Name = "Name", Description = "The genre name", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "GET")]
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public string Name { get; set; }
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}
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public class InstantMixService : BaseApiService
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{
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private readonly IUserManager _userManager;
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private readonly IUserDataRepository _userDataRepository;
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private readonly ILibraryManager _libraryManager;
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private readonly IItemRepository _itemRepo;
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public InstantMixService(IUserManager userManager, IUserDataRepository userDataRepository, ILibraryManager libraryManager, IItemRepository itemRepo)
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{
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_userManager = userManager;
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_userDataRepository = userDataRepository;
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_libraryManager = libraryManager;
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_itemRepo = itemRepo;
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}
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public object Get(GetInstantMixFromSong request)
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{
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var item = DtoBuilder.GetItemByClientId(request.Id, _userManager, _libraryManager);
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var result = GetInstantMixResult(request, item.Genres).Result;
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return ToOptimizedResult(result);
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}
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public object Get(GetInstantMixFromAlbum request)
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{
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var item = DtoBuilder.GetItemByClientId(request.Id, _userManager, _libraryManager);
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var result = GetInstantMixResult(request, item.Genres).Result;
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return ToOptimizedResult(result);
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}
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public object Get(GetInstantMixFromMusicGenre request)
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{
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var genre = GetMusicGenre(request.Name, _libraryManager).Result;
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var result = GetInstantMixResult(request, new[] { genre.Name }).Result;
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return ToOptimizedResult(result);
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}
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public object Get(GetInstantMixFromArtist request)
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{
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var artist = GetArtist(request.Name, _libraryManager).Result;
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var genres = _libraryManager.RootFolder
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.RecursiveChildren
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.OfType<Audio>()
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.Where(i => i.HasArtist(artist.Name))
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.SelectMany(i => i.Genres)
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.Distinct(StringComparer.OrdinalIgnoreCase);
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var result = GetInstantMixResult(request, genres).Result;
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return ToOptimizedResult(result);
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}
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private async Task<ItemsResult> GetInstantMixResult(BaseGetSimilarItems request, IEnumerable<string> genres)
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{
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var user = request.UserId.HasValue ? _userManager.GetUserById(request.UserId.Value) : null;
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var fields = request.GetItemFields().ToList();
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var dtoBuilder = new DtoBuilder(Logger, _libraryManager, _userDataRepository, _itemRepo);
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var inputItems = user == null
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? _libraryManager.RootFolder.RecursiveChildren
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: user.RootFolder.GetRecursiveChildren(user);
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var genresDictionary = genres.ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
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var limit = request.Limit.HasValue ? request.Limit.Value * 2 : 100;
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var items = inputItems
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.OfType<Audio>()
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.Select(i => new Tuple<Audio, int>(i, i.Genres.Count(genresDictionary.ContainsKey)))
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.OrderByDescending(i => i.Item2)
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.ThenBy(i => Guid.NewGuid())
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.Select(i => i.Item1)
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.Take(limit)
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.OrderBy(i => Guid.NewGuid())
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.ToArray();
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var result = new ItemsResult
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{
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TotalRecordCount = items.Length
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};
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var tasks = items.Take(request.Limit ?? items.Length)
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.Select(i => dtoBuilder.GetBaseItemDto(i, fields, user));
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result.Items = await Task.WhenAll(tasks).ConfigureAwait(false);
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return result;
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}
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}
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}
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