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path: root/MediaBrowser.Api/UserLibrary/GenresService.cs
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using MediaBrowser.Controller.Dto;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Querying;
using ServiceStack.ServiceHost;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace MediaBrowser.Api.UserLibrary
{
    /// <summary>
    /// Class GetGenres
    /// </summary>
    [Route("/Genres", "GET")]
    [Api(Description = "Gets all genres from a given item, folder, or the entire library")]
    public class GetGenres : GetItemsByName
    {
    }

    /// <summary>
    /// Class GetGenre
    /// </summary>
    [Route("/Genres/{Name}", "GET")]
    [Api(Description = "Gets a genre, by name")]
    public class GetGenre : IReturn<BaseItemDto>
    {
        /// <summary>
        /// Gets or sets the name.
        /// </summary>
        /// <value>The name.</value>
        [ApiMember(Name = "Name", Description = "The genre name", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "GET")]
        public string Name { get; set; }

        /// <summary>
        /// Gets or sets the user id.
        /// </summary>
        /// <value>The user id.</value>
        [ApiMember(Name = "UserId", Description = "Optional. Filter by user id, and attach user data", IsRequired = false, DataType = "string", ParameterType = "query", Verb = "GET")]
        public Guid? UserId { get; set; }
    }
    
    /// <summary>
    /// Class GenresService
    /// </summary>
    public class GenresService : BaseItemsByNameService<Genre>
    {
        public GenresService(IUserManager userManager, ILibraryManager libraryManager, IUserDataRepository userDataRepository, IItemRepository itemRepo, IDtoService dtoService)
            : base(userManager, libraryManager, userDataRepository, itemRepo, dtoService)
        {
        }

        /// <summary>
        /// Gets the specified request.
        /// </summary>
        /// <param name="request">The request.</param>
        /// <returns>System.Object.</returns>
        public object Get(GetGenre request)
        {
            var result = GetItem(request).Result;

            return ToOptimizedResult(result);
        }

        /// <summary>
        /// Gets the item.
        /// </summary>
        /// <param name="request">The request.</param>
        /// <returns>Task{BaseItemDto}.</returns>
        private async Task<BaseItemDto> GetItem(GetGenre request)
        {
            var item = await GetGenre(request.Name, LibraryManager).ConfigureAwait(false);

            // Get everything
            var fields = Enum.GetNames(typeof(ItemFields)).Select(i => (ItemFields)Enum.Parse(typeof(ItemFields), i, true));

            if (request.UserId.HasValue)
            {
                var user = UserManager.GetUserById(request.UserId.Value);

                return await DtoService.GetBaseItemDto(item, fields.ToList(), user).ConfigureAwait(false);
            }

            return await DtoService.GetBaseItemDto(item, fields.ToList()).ConfigureAwait(false);
        }
       
        /// <summary>
        /// Gets the specified request.
        /// </summary>
        /// <param name="request">The request.</param>
        /// <returns>System.Object.</returns>
        public object Get(GetGenres request)
        {
            var result = GetResult(request).Result;

            return ToOptimizedResult(result);
        }

        /// <summary>
        /// Gets all items.
        /// </summary>
        /// <param name="request">The request.</param>
        /// <param name="items">The items.</param>
        /// <returns>IEnumerable{Tuple{System.StringFunc{System.Int32}}}.</returns>
        protected override IEnumerable<IbnStub<Genre>> GetAllItems(GetItemsByName request, IEnumerable<BaseItem> items)
        {
            var itemsList = items.Where(i => i.Genres != null).ToList();

            return itemsList
                .SelectMany(i => i.Genres)
                .Distinct(StringComparer.OrdinalIgnoreCase)
                .Select(name => new IbnStub<Genre>(name, GetEntity));
        }

        /// <summary>
        /// Gets the entity.
        /// </summary>
        /// <param name="name">The name.</param>
        /// <returns>Task{Genre}.</returns>
        protected Task<Genre> GetEntity(string name)
        {
            return LibraryManager.GetGenre(name);
        }
    }
}