420 lines
16 KiB
C#
420 lines
16 KiB
C#
using MediaBrowser.Common.Extensions;
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using MediaBrowser.Controller.Dto;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Entities.Movies;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Net;
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using MediaBrowser.Controller.Persistence;
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using MediaBrowser.Model.Dto;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Querying;
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using MoreLinq;
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using ServiceStack;
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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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using MediaBrowser.Controller.LiveTv;
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namespace MediaBrowser.Api.Movies
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{
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/// <summary>
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/// Class GetSimilarMovies
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/// </summary>
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[Route("/Movies/{Id}/Similar", "GET", Summary = "Finds movies and trailers similar to a given movie.")]
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public class GetSimilarMovies : BaseGetSimilarItemsFromItem
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{
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}
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/// <summary>
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/// Class GetSimilarTrailers
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/// </summary>
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[Route("/Trailers/{Id}/Similar", "GET", Summary = "Finds movies and trailers similar to a given trailer.")]
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public class GetSimilarTrailers : BaseGetSimilarItemsFromItem
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{
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}
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[Route("/Movies/Recommendations", "GET", Summary = "Gets movie recommendations")]
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public class GetMovieRecommendations : IReturn<RecommendationDto[]>, IHasItemFields
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{
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[ApiMember(Name = "CategoryLimit", Description = "The max number of categories to return", IsRequired = false, DataType = "int", ParameterType = "query", Verb = "GET")]
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public int CategoryLimit { get; set; }
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[ApiMember(Name = "ItemLimit", Description = "The max number of items to return per category", IsRequired = false, DataType = "int", ParameterType = "query", Verb = "GET")]
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public int ItemLimit { get; set; }
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/// <summary>
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/// Gets or sets the user id.
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/// </summary>
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/// <value>The user id.</value>
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[ApiMember(Name = "UserId", Description = "Optional. Filter by user id, and attach user data", IsRequired = false, DataType = "string", ParameterType = "query", Verb = "GET")]
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public string UserId { get; set; }
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/// <summary>
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/// Specify this to localize the search to a specific item or folder. Omit to use the root.
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/// </summary>
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/// <value>The parent id.</value>
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[ApiMember(Name = "ParentId", Description = "Specify this to localize the search to a specific item or folder. Omit to use the root", IsRequired = false, DataType = "string", ParameterType = "query", Verb = "GET")]
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public string ParentId { get; set; }
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public GetMovieRecommendations()
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{
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CategoryLimit = 5;
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ItemLimit = 8;
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}
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public string Fields { get; set; }
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}
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/// <summary>
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/// Class MoviesService
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/// </summary>
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[Authenticated]
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public class MoviesService : BaseApiService
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{
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/// <summary>
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/// The _user manager
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/// </summary>
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private readonly IUserManager _userManager;
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/// <summary>
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/// The _user data repository
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/// </summary>
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private readonly IUserDataManager _userDataRepository;
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/// <summary>
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/// The _library manager
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/// </summary>
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private readonly ILibraryManager _libraryManager;
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private readonly IItemRepository _itemRepo;
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private readonly IDtoService _dtoService;
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/// <summary>
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/// Initializes a new instance of the <see cref="MoviesService" /> class.
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/// </summary>
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/// <param name="userManager">The user manager.</param>
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/// <param name="userDataRepository">The user data repository.</param>
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/// <param name="libraryManager">The library manager.</param>
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/// <param name="itemRepo">The item repo.</param>
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/// <param name="dtoService">The dto service.</param>
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public MoviesService(IUserManager userManager, IUserDataManager userDataRepository, ILibraryManager libraryManager, IItemRepository itemRepo, IDtoService dtoService)
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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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_dtoService = dtoService;
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}
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/// <summary>
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/// Gets the specified request.
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/// </summary>
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/// <param name="request">The request.</param>
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/// <returns>System.Object.</returns>
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public async Task<object> Get(GetSimilarMovies request)
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{
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var result = await GetSimilarItemsResult(request).ConfigureAwait(false);
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return ToOptimizedSerializedResultUsingCache(result);
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}
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public async Task<object> Get(GetSimilarTrailers request)
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{
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var result = await GetSimilarItemsResult(request).ConfigureAwait(false);
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return ToOptimizedSerializedResultUsingCache(result);
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}
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public async Task<object> Get(GetMovieRecommendations request)
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{
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var user = _userManager.GetUserById(request.UserId);
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var dtoOptions = GetDtoOptions(request);
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dtoOptions.Fields = request.GetItemFields().ToList();
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var result = GetRecommendationCategories(user, request.ParentId, request.CategoryLimit, request.ItemLimit, dtoOptions);
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return ToOptimizedResult(result);
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}
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private async Task<QueryResult<BaseItemDto>> GetSimilarItemsResult(BaseGetSimilarItemsFromItem request)
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{
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var user = !string.IsNullOrWhiteSpace(request.UserId) ? _userManager.GetUserById(request.UserId) : null;
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var item = string.IsNullOrEmpty(request.Id) ?
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(!string.IsNullOrWhiteSpace(request.UserId) ? user.RootFolder :
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_libraryManager.RootFolder) : _libraryManager.GetItemById(request.Id);
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var itemsResult = _libraryManager.GetItemList(new InternalItemsQuery(user)
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{
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Limit = request.Limit,
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IncludeItemTypes = new[]
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{
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typeof(Movie).Name,
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typeof(Trailer).Name,
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typeof(LiveTvProgram).Name
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},
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IsMovie = true,
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SimilarTo = item,
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EnableGroupByMetadataKey = true
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}).ToList();
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var dtoOptions = GetDtoOptions(request);
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var result = new QueryResult<BaseItemDto>
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{
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Items = (await _dtoService.GetBaseItemDtos(itemsResult, dtoOptions, user).ConfigureAwait(false)).ToArray(),
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TotalRecordCount = itemsResult.Count
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};
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return result;
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}
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private IEnumerable<RecommendationDto> GetRecommendationCategories(User user, string parentId, int categoryLimit, int itemLimit, DtoOptions dtoOptions)
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{
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var categories = new List<RecommendationDto>();
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var parentIdGuid = string.IsNullOrWhiteSpace(parentId) ? (Guid?)null : new Guid(parentId);
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var query = new InternalItemsQuery(user)
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{
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IncludeItemTypes = new[]
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{
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typeof(Movie).Name,
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//typeof(Trailer).Name,
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//typeof(LiveTvProgram).Name
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},
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// IsMovie = true
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SortBy = new[] { ItemSortBy.DatePlayed, ItemSortBy.Random },
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SortOrder = SortOrder.Descending,
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Limit = 7,
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ParentId = parentIdGuid,
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Recursive = true,
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IsPlayed = true
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};
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var recentlyPlayedMovies = _libraryManager.GetItemList(query).ToList();
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var likedMovies = _libraryManager.GetItemList(new InternalItemsQuery(user)
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{
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IncludeItemTypes = new[]
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{
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typeof(Movie).Name,
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typeof(Trailer).Name,
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typeof(LiveTvProgram).Name
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},
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IsMovie = true,
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SortBy = new[] { ItemSortBy.Random },
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SortOrder = SortOrder.Descending,
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Limit = 10,
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IsFavoriteOrLiked = true,
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ExcludeItemIds = recentlyPlayedMovies.Select(i => i.Id.ToString("N")).ToArray(),
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EnableGroupByMetadataKey = true,
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ParentId = parentIdGuid,
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Recursive = true
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}).ToList();
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var mostRecentMovies = recentlyPlayedMovies.Take(6).ToList();
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// Get recently played directors
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var recentDirectors = GetDirectors(mostRecentMovies)
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.OrderBy(i => Guid.NewGuid())
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.ToList();
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// Get recently played actors
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var recentActors = GetActors(mostRecentMovies)
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.OrderBy(i => Guid.NewGuid())
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.ToList();
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var similarToRecentlyPlayed = GetSimilarTo(user, recentlyPlayedMovies, itemLimit, dtoOptions, RecommendationType.SimilarToRecentlyPlayed).GetEnumerator();
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var similarToLiked = GetSimilarTo(user, likedMovies, itemLimit, dtoOptions, RecommendationType.SimilarToLikedItem).GetEnumerator();
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var hasDirectorFromRecentlyPlayed = GetWithDirector(user, recentDirectors, itemLimit, dtoOptions, RecommendationType.HasDirectorFromRecentlyPlayed).GetEnumerator();
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var hasActorFromRecentlyPlayed = GetWithActor(user, recentActors, itemLimit, dtoOptions, RecommendationType.HasActorFromRecentlyPlayed).GetEnumerator();
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var categoryTypes = new List<IEnumerator<RecommendationDto>>
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{
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// Give this extra weight
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similarToRecentlyPlayed,
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similarToRecentlyPlayed,
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// Give this extra weight
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similarToLiked,
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similarToLiked,
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hasDirectorFromRecentlyPlayed,
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hasActorFromRecentlyPlayed
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};
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while (categories.Count < categoryLimit)
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{
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var allEmpty = true;
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foreach (var category in categoryTypes)
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{
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if (category.MoveNext())
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{
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categories.Add(category.Current);
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allEmpty = false;
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if (categories.Count >= categoryLimit)
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{
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break;
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}
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}
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}
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if (allEmpty)
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{
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break;
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}
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}
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return categories.OrderBy(i => i.RecommendationType).ThenBy(i => Guid.NewGuid());
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}
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private IEnumerable<RecommendationDto> GetWithDirector(User user, IEnumerable<string> names, int itemLimit, DtoOptions dtoOptions, RecommendationType type)
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{
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foreach (var name in names)
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{
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var items = _libraryManager.GetItemList(new InternalItemsQuery(user)
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{
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Person = name,
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// Account for duplicates by imdb id, since the database doesn't support this yet
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Limit = itemLimit + 2,
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PersonTypes = new[] { PersonType.Director },
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IncludeItemTypes = new[]
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{
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typeof(Movie).Name,
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typeof(Trailer).Name,
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typeof(LiveTvProgram).Name
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},
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IsMovie = true,
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EnableGroupByMetadataKey = true
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}).DistinctBy(i => i.GetProviderId(MetadataProviders.Imdb) ?? Guid.NewGuid().ToString("N"))
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.Take(itemLimit)
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.ToList();
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if (items.Count > 0)
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{
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yield return new RecommendationDto
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{
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BaselineItemName = name,
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CategoryId = name.GetMD5().ToString("N"),
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RecommendationType = type,
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Items = _dtoService.GetBaseItemDtos(items, dtoOptions, user).Result.ToArray()
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};
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}
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}
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}
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private IEnumerable<RecommendationDto> GetWithActor(User user, IEnumerable<string> names, int itemLimit, DtoOptions dtoOptions, RecommendationType type)
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{
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foreach (var name in names)
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{
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var items = _libraryManager.GetItemList(new InternalItemsQuery(user)
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{
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Person = name,
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// Account for duplicates by imdb id, since the database doesn't support this yet
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Limit = itemLimit + 2,
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IncludeItemTypes = new[]
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{
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typeof(Movie).Name,
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typeof(Trailer).Name,
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typeof(LiveTvProgram).Name
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},
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IsMovie = true,
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EnableGroupByMetadataKey = true
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}).DistinctBy(i => i.GetProviderId(MetadataProviders.Imdb) ?? Guid.NewGuid().ToString("N"))
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.Take(itemLimit)
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.ToList();
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if (items.Count > 0)
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{
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yield return new RecommendationDto
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{
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BaselineItemName = name,
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CategoryId = name.GetMD5().ToString("N"),
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RecommendationType = type,
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Items = _dtoService.GetBaseItemDtos(items, dtoOptions, user).Result.ToArray()
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};
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}
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}
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}
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private IEnumerable<RecommendationDto> GetSimilarTo(User user, List<BaseItem> baselineItems, int itemLimit, DtoOptions dtoOptions, RecommendationType type)
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{
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foreach (var item in baselineItems)
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{
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var similar = _libraryManager.GetItemList(new InternalItemsQuery(user)
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{
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Limit = itemLimit,
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IncludeItemTypes = new[]
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{
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typeof(Movie).Name,
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typeof(Trailer).Name,
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typeof(LiveTvProgram).Name
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},
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IsMovie = true,
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SimilarTo = item,
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EnableGroupByMetadataKey = true
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}).ToList();
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if (similar.Count > 0)
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{
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yield return new RecommendationDto
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{
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BaselineItemName = item.Name,
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CategoryId = item.Id.ToString("N"),
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RecommendationType = type,
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Items = _dtoService.GetBaseItemDtos(similar, dtoOptions, user).Result.ToArray()
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};
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}
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}
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}
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private IEnumerable<string> GetActors(IEnumerable<BaseItem> items)
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{
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var people = _libraryManager.GetPeople(new InternalPeopleQuery
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{
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ExcludePersonTypes = new List<string>
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{
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PersonType.Director
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},
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MaxListOrder = 3
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});
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var itemIds = items.Select(i => i.Id).ToList();
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return people
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.Where(i => itemIds.Contains(i.ItemId))
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.Select(i => i.Name)
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.DistinctNames();
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}
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private IEnumerable<string> GetDirectors(IEnumerable<BaseItem> items)
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{
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var people = _libraryManager.GetPeople(new InternalPeopleQuery
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{
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PersonTypes = new List<string>
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{
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PersonType.Director
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}
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});
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var itemIds = items.Select(i => i.Id).ToList();
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return people
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.Where(i => itemIds.Contains(i.ItemId))
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.Select(i => i.Name)
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.DistinctNames();
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}
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}
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}
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