/// <summary>
/// Gets the similar items.
/// </summary>
/// <param name="userManager">The user manager.</param>
/// <param name="itemRepository">The item repository.</param>
/// <param name="libraryManager">The library manager.</param>
/// <param name="userDataRepository">The user data repository.</param>
/// <param name="logger">The logger.</param>
/// <param name="request">The request.</param>
/// <param name="includeInSearch">The include in search.</param>
/// <param name="getSimilarityScore">The get similarity score.</param>
/// <returns>ItemsResult.</returns>
internal static ItemsResult GetSimilarItems(IUserManager userManager, IItemRepository itemRepository, ILibraryManager libraryManager, IUserDataRepository userDataRepository, ILogger logger, BaseGetSimilarItems request, Func <BaseItem, bool> includeInSearch, Func <BaseItem, BaseItem, int> getSimilarityScore)
{
var user = request.UserId.HasValue ? userManager.GetUserById(request.UserId.Value) : null;
var item = string.IsNullOrEmpty(request.Id) ?
(request.UserId.HasValue ? user.RootFolder :
(Folder)libraryManager.RootFolder) : DtoBuilder.GetItemByClientId(request.Id, userManager, libraryManager, request.UserId);
var fields = request.GetItemFields().ToList();
var dtoBuilder = new DtoBuilder(logger, libraryManager, userDataRepository, itemRepository);
var inputItems = user == null
? libraryManager.RootFolder.RecursiveChildren
: user.RootFolder.GetRecursiveChildren(user);
var items = GetSimilaritems(item, inputItems, includeInSearch, getSimilarityScore).ToArray();
var result = new ItemsResult
{
Items = items.Take(request.Limit ?? items.Length).Select(i => dtoBuilder.GetBaseItemDto(i, fields, user)).Select(t => t.Result).ToArray(),
TotalRecordCount = items.Length
};
return(result);
}
private async Task <ItemsResult> GetInstantMixResult(BaseGetSimilarItems request, IEnumerable <string> genres)
{
var user = request.UserId.HasValue ? _userManager.GetUserById(request.UserId.Value) : null;
var fields = request.GetItemFields().ToList();
var dtoBuilder = new DtoBuilder(Logger, _libraryManager, _userDataRepository, _itemRepo);
var inputItems = user == null
? _libraryManager.RootFolder.RecursiveChildren
: user.RootFolder.GetRecursiveChildren(user);
var genresDictionary = genres.ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
var limit = request.Limit.HasValue ? request.Limit.Value * 2 : 100;
var items = inputItems
.OfType <Audio>()
.Select(i => new Tuple <Audio, int>(i, i.Genres.Count(genresDictionary.ContainsKey)))
.OrderByDescending(i => i.Item2)
.ThenBy(i => Guid.NewGuid())
.Select(i => i.Item1)
.Take(limit)
.OrderBy(i => Guid.NewGuid())
.ToArray();
var result = new ItemsResult
{
TotalRecordCount = items.Length
};
var tasks = items.Take(request.Limit ?? items.Length)
.Select(i => dtoBuilder.GetBaseItemDto(i, fields, user));
result.Items = await Task.WhenAll(tasks).ConfigureAwait(false);
return(result);
}
private ItemsResult GetInstantMixResult(BaseGetSimilarItems request, IEnumerable <string> genres)
{
var user = request.UserId.HasValue ? _userManager.GetUserById(request.UserId.Value) : null;
var fields = request.GetItemFields().ToList();
var inputItems = user == null
? _libraryManager.RootFolder.RecursiveChildren
: user.RootFolder.GetRecursiveChildren(user);
var genresDictionary = genres.ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
var limit = request.Limit.HasValue ? request.Limit.Value * 2 : 100;
var items = inputItems
.OfType <Audio>()
.Select(i => new Tuple <Audio, int>(i, i.Genres.Count(genresDictionary.ContainsKey)))
.OrderByDescending(i => i.Item2)
.ThenBy(i => Guid.NewGuid())
.Select(i => i.Item1)
.Take(limit)
.OrderBy(i => Guid.NewGuid())
.ToList();
var result = new ItemsResult
{
TotalRecordCount = items.Count
};
var dtos = items.Take(request.Limit ?? items.Count)
.Select(i => _dtoService.GetBaseItemDto(i, fields, user));
result.Items = dtos.ToArray();
return(result);
}
