1 files changed, 196 insertions, 0 deletions
diff --git a/Jellyfin.Api/Controllers/MusicGenresController.cs b/Jellyfin.Api/Controllers/MusicGenresController.cs
new file mode 100644
index 000000000..27eec2b9a
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+++ b/Jellyfin.Api/Controllers/MusicGenresController.cs
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+using System;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using Jellyfin.Api.Constants;
+using Jellyfin.Api.Extensions;
+using Jellyfin.Api.Helpers;
+using Jellyfin.Api.ModelBinders;
+using Jellyfin.Data.Entities;
+using Jellyfin.Data.Enums;
+using MediaBrowser.Controller.Dto;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Audio;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.Dto;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.Querying;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Jellyfin.Api.Controllers
+{
+    /// <summary>
+    /// The music genres controller.
+    /// </summary>
+    [Authorize(Policy = Policies.DefaultAuthorization)]
+    public class MusicGenresController : BaseJellyfinApiController
+    {
+        private readonly ILibraryManager _libraryManager;
+        private readonly IDtoService _dtoService;
+        private readonly IUserManager _userManager;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MusicGenresController"/> class.
+        /// </summary>
+        /// <param name="libraryManager">Instance of <see cref="ILibraryManager"/> interface.</param>
+        /// <param name="userManager">Instance of <see cref="IUserManager"/> interface.</param>
+        /// <param name="dtoService">Instance of <see cref="IDtoService"/> interface.</param>
+        public MusicGenresController(
+            ILibraryManager libraryManager,
+            IUserManager userManager,
+            IDtoService dtoService)
+        {
+            _libraryManager = libraryManager;
+            _userManager = userManager;
+            _dtoService = dtoService;
+        }
+
+        /// <summary>
+        /// Gets all music genres from a given item, folder, or the entire library.
+        /// </summary>
+        /// <param name="startIndex">Optional. The record index to start at. All items with a lower index will be dropped from the results.</param>
+        /// <param name="limit">Optional. The maximum number of records to return.</param>
+        /// <param name="searchTerm">The search term.</param>
+        /// <param name="parentId">Specify this to localize the search to a specific item or folder. Omit to use the root.</param>
+        /// <param name="fields">Optional. Specify additional fields of information to return in the output.</param>
+        /// <param name="excludeItemTypes">Optional. If specified, results will be filtered out based on item type. This allows multiple, comma delimited.</param>
+        /// <param name="includeItemTypes">Optional. If specified, results will be filtered in based on item type. This allows multiple, comma delimited.</param>
+        /// <param name="isFavorite">Optional filter by items that are marked as favorite, or not.</param>
+        /// <param name="imageTypeLimit">Optional, the max number of images to return, per image type.</param>
+        /// <param name="enableImageTypes">Optional. The image types to include in the output.</param>
+        /// <param name="userId">User id.</param>
+        /// <param name="nameStartsWithOrGreater">Optional filter by items whose name is sorted equally or greater than a given input string.</param>
+        /// <param name="nameStartsWith">Optional filter by items whose name is sorted equally than a given input string.</param>
+        /// <param name="nameLessThan">Optional filter by items whose name is equally or lesser than a given input string.</param>
+        /// <param name="sortBy">Optional. Specify one or more sort orders, comma delimited.</param>
+        /// <param name="sortOrder">Sort Order - Ascending,Descending.</param>
+        /// <param name="enableImages">Optional, include image information in output.</param>
+        /// <param name="enableTotalRecordCount">Optional. Include total record count.</param>
+        /// <response code="200">Music genres returned.</response>
+        /// <returns>An <see cref="OkResult"/> containing the queryresult of music genres.</returns>
+        [HttpGet]
+        [Obsolete("Use GetGenres instead")]
+        public ActionResult<QueryResult<BaseItemDto>> GetMusicGenres(
+            [FromQuery] int? startIndex,
+            [FromQuery] int? limit,
+            [FromQuery] string? searchTerm,
+            [FromQuery] Guid? parentId,
+            [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] ItemFields[] fields,
+            [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] BaseItemKind[] excludeItemTypes,
+            [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] BaseItemKind[] includeItemTypes,
+            [FromQuery] bool? isFavorite,
+            [FromQuery] int? imageTypeLimit,
+            [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] ImageType[] enableImageTypes,
+            [FromQuery] Guid? userId,
+            [FromQuery] string? nameStartsWithOrGreater,
+            [FromQuery] string? nameStartsWith,
+            [FromQuery] string? nameLessThan,
+            [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] string[] sortBy,
+            [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] SortOrder[] sortOrder,
+            [FromQuery] bool? enableImages = true,
+            [FromQuery] bool enableTotalRecordCount = true)
+        {
+            var dtoOptions = new DtoOptions { Fields = fields }
+                .AddClientFields(Request)
+                .AddAdditionalDtoOptions(enableImages, false, imageTypeLimit, enableImageTypes);
+
+            User? user = userId.HasValue && userId != Guid.Empty ? _userManager.GetUserById(userId.Value) : null;
+
+            var parentItem = _libraryManager.GetParentItem(parentId, userId);
+
+            var query = new InternalItemsQuery(user)
+            {
+                ExcludeItemTypes = RequestHelpers.GetItemTypeStrings(excludeItemTypes),
+                IncludeItemTypes = RequestHelpers.GetItemTypeStrings(includeItemTypes),
+                StartIndex = startIndex,
+                Limit = limit,
+                IsFavorite = isFavorite,
+                NameLessThan = nameLessThan,
+                NameStartsWith = nameStartsWith,
+                NameStartsWithOrGreater = nameStartsWithOrGreater,
+                DtoOptions = dtoOptions,
+                SearchTerm = searchTerm,
+                EnableTotalRecordCount = enableTotalRecordCount,
+                OrderBy = RequestHelpers.GetOrderBy(sortBy, sortOrder)
+            };
+
+            if (parentId.HasValue)
+            {
+                if (parentItem is Folder)
+                {
+                    query.AncestorIds = new[] { parentId.Value };
+                }
+                else
+                {
+                    query.ItemIds = new[] { parentId.Value };
+                }
+            }
+
+            var result = _libraryManager.GetMusicGenres(query);
+
+            var shouldIncludeItemTypes = includeItemTypes.Length != 0;
+            return RequestHelpers.CreateQueryResult(result, dtoOptions, _dtoService, shouldIncludeItemTypes, user);
+        }
+
+        /// <summary>
+        /// Gets a music genre, by name.
+        /// </summary>
+        /// <param name="genreName">The genre name.</param>
+        /// <param name="userId">Optional. Filter by user id, and attach user data.</param>
+        /// <returns>An <see cref="OkResult"/> containing a <see cref="BaseItemDto"/> with the music genre.</returns>
+        [HttpGet("{genreName}")]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        public ActionResult<BaseItemDto> GetMusicGenre([FromRoute, Required] string genreName, [FromQuery] Guid? userId)
+        {
+            var dtoOptions = new DtoOptions().AddClientFields(Request);
+
+            MusicGenre? item;
+
+            if (genreName.IndexOf(BaseItem.SlugChar, StringComparison.OrdinalIgnoreCase) != -1)
+            {
+                item = GetItemFromSlugName<MusicGenre>(_libraryManager, genreName, dtoOptions);
+            }
+            else
+            {
+                item = _libraryManager.GetMusicGenre(genreName);
+            }
+
+            if (userId.HasValue && !userId.Equals(Guid.Empty))
+            {
+                var user = _userManager.GetUserById(userId.Value);
+
+                return _dtoService.GetBaseItemDto(item, dtoOptions, user);
+            }
+
+            return _dtoService.GetBaseItemDto(item, dtoOptions);
+        }
+
+        private T? GetItemFromSlugName<T>(ILibraryManager libraryManager, string name, DtoOptions dtoOptions)
+            where T : BaseItem, new()
+        {
+            var result = libraryManager.GetItemList(new InternalItemsQuery
+            {
+                Name = name.Replace(BaseItem.SlugChar, '&'),
+                IncludeItemTypes = new[] { typeof(T).Name },
+                DtoOptions = dtoOptions
+            }).OfType<T>().FirstOrDefault();
+
+            result ??= libraryManager.GetItemList(new InternalItemsQuery
+            {
+                Name = name.Replace(BaseItem.SlugChar, '/'),
+                IncludeItemTypes = new[] { typeof(T).Name },
+                DtoOptions = dtoOptions
+            }).OfType<T>().FirstOrDefault();
+
+            result ??= libraryManager.GetItemList(new InternalItemsQuery
+            {
+                Name = name.Replace(BaseItem.SlugChar, '?'),
+                IncludeItemTypes = new[] { typeof(T).Name },
+                DtoOptions = dtoOptions
+            }).OfType<T>().FirstOrDefault();
+
+            return result;
+        }
+    }
+}