@ -127,32 +127,6 @@ namespace MediaBrowser.Api
public Guid ? UserId { get ; set ; }
}
[Route("/Items/{Id}/Similar", "GET")]
[Api(Description = "Gets items similar to a given input item.")]
public class GetSimilarItems : IReturn < ItemsResult >
{
/// <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>
/// Gets or sets the id.
/// </summary>
/// <value>The id.</value>
[ApiMember(Name = "Id", Description = "Item Id", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "GET")]
public string Id { get ; set ; }
/// <summary>
/// The maximum number of items to return
/// </summary>
/// <value>The limit.</value>
[ApiMember(Name = "Limit", Description = "Optional. The maximum number of records to return", IsRequired = false, DataType = "int", ParameterType = "query", Verb = "GET")]
public int? Limit { get ; set ; }
}
/// <summary>
/// Class LibraryService
/// </summary>
@ -420,6 +394,11 @@ namespace MediaBrowser.Api
Task . WaitAll ( task ) ;
}
/// <summary>
/// Refreshes the item.
/// </summary>
/// <param name="request">The request.</param>
/// <returns>Task.</returns>
private async Task RefreshItem ( RefreshItem request )
{
var item = DtoBuilder . GetItemByClientId ( request . Id , _userManager , _libraryManager ) ;
@ -441,183 +420,5 @@ namespace MediaBrowser.Api
Logger . ErrorException ( "Error refreshing library" , ex ) ;
}
}
/// <summary>
/// Gets the specified request.
/// </summary>
/// <param name="request">The request.</param>
/// <returns>System.Object.</returns>
public object Get ( GetSimilarItems request )
{
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 ) ;
// Get everything
var fields = Enum . GetNames ( typeof ( ItemFields ) ) . Select ( i = > ( ItemFields ) Enum . Parse ( typeof ( ItemFields ) , i , true ) ) . ToList ( ) ;
var dtoBuilder = new DtoBuilder ( Logger , _libraryManager , _userDataRepository ) ;
var inputItems = user = = null
? _libraryManager . RootFolder . RecursiveChildren
: user . RootFolder . GetRecursiveChildren ( user ) ;
var items = GetSimilaritems ( item , inputItems ) . 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 ToOptimizedResult ( result ) ;
}
/// <summary>
/// Gets the similiar items.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="inputItems">The input items.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
private IEnumerable < BaseItem > GetSimilaritems ( BaseItem item , IEnumerable < BaseItem > inputItems )
{
if ( item is Movie | | item is Trailer )
{
inputItems = inputItems . Where ( i = > i is Movie | | i is Trailer ) ;
}
else if ( item is Series )
{
inputItems = inputItems . Where ( i = > i is Series ) ;
}
else if ( item is BaseGame )
{
inputItems = inputItems . Where ( i = > i is BaseGame ) ;
}
else if ( item is MusicAlbum )
{
inputItems = inputItems . Where ( i = > i is MusicAlbum ) ;
}
else if ( item is Audio )
{
inputItems = inputItems . Where ( i = > i is Audio ) ;
}
// Avoid implicitly captured closure
var currentItem = item ;
return inputItems . Where ( i = > i . Id ! = currentItem . Id )
. Select ( i = > new Tuple < BaseItem , int > ( i , GetSimiliarityScore ( item , i ) ) )
. Where ( i = > i . Item2 > 0 )
. OrderByDescending ( i = > i . Item2 )
. ThenByDescending ( i = > i . Item1 . CriticRating ? ? 0 )
. Select ( i = > i . Item1 ) ;
}
/// <summary>
/// Gets the similiarity score.
/// </summary>
/// <param name="item1">The item1.</param>
/// <param name="item2">The item2.</param>
/// <returns>System.Int32.</returns>
private int GetSimiliarityScore ( BaseItem item1 , BaseItem item2 )
{
var points = 0 ;
if ( ! string . IsNullOrEmpty ( item1 . OfficialRating ) & & string . Equals ( item1 . OfficialRating , item2 . OfficialRating , StringComparison . OrdinalIgnoreCase ) )
{
points + = 1 ;
}
// Find common genres
points + = item1 . Genres . Where ( i = > item2 . Genres . Contains ( i , StringComparer . OrdinalIgnoreCase ) ) . Sum ( i = > 5 ) ;
// Find common tags
points + = item1 . Tags . Where ( i = > item2 . Tags . Contains ( i , StringComparer . OrdinalIgnoreCase ) ) . Sum ( i = > 5 ) ;
// Find common studios
points + = item1 . Studios . Where ( i = > item2 . Studios . Contains ( i , StringComparer . OrdinalIgnoreCase ) ) . Sum ( i = > 3 ) ;
var item2PeopleNames = item2 . People . Select ( i = > i . Name ) . ToList ( ) ;
points + = item1 . People . Where ( i = > item2PeopleNames . Contains ( i . Name , StringComparer . OrdinalIgnoreCase ) ) . Sum ( i = >
{
if ( string . Equals ( i . Name , PersonType . Director , StringComparison . OrdinalIgnoreCase ) )
{
return 5 ;
}
if ( string . Equals ( i . Name , PersonType . Actor , StringComparison . OrdinalIgnoreCase ) )
{
return 3 ;
}
if ( string . Equals ( i . Name , PersonType . Composer , StringComparison . OrdinalIgnoreCase ) )
{
return 3 ;
}
if ( string . Equals ( i . Name , PersonType . GuestStar , StringComparison . OrdinalIgnoreCase ) )
{
return 3 ;
}
if ( string . Equals ( i . Name , PersonType . Writer , StringComparison . OrdinalIgnoreCase ) )
{
return 2 ;
}
return 1 ;
} ) ;
if ( item1 . ProductionYear . HasValue & & item2 . ProductionYear . HasValue )
{
var diff = Math . Abs ( item1 . ProductionYear . Value - item2 . ProductionYear . Value ) ;
// Add if they came out within the same decade
if ( diff < 10 )
{
points + = 3 ;
}
// And more if within five years
if ( diff < 5 )
{
points + = 3 ;
}
}
var album = item1 as MusicAlbum ;
if ( album ! = null )
{
points + = GetAlbumSimilarityScore ( album , ( MusicAlbum ) item2 ) ;
}
return points ;
}
/// <summary>
/// Gets the album similarity score.
/// </summary>
/// <param name="item1">The item1.</param>
/// <param name="item2">The item2.</param>
/// <returns>System.Int32.</returns>
private int GetAlbumSimilarityScore ( MusicAlbum item1 , MusicAlbum item2 )
{
var artists1 = item1 . RecursiveChildren
. OfType < Audio > ( )
. SelectMany ( i = > new [ ] { i . AlbumArtist , i . Artist } )
. Where ( i = > ! string . IsNullOrEmpty ( i ) )
. Distinct ( StringComparer . OrdinalIgnoreCase )
. ToList ( ) ;
var artists2 = item2 . RecursiveChildren
. OfType < Audio > ( )
. SelectMany ( i = > new [ ] { i . AlbumArtist , i . Artist } )
. Where ( i = > ! string . IsNullOrEmpty ( i ) )
. Distinct ( StringComparer . OrdinalIgnoreCase )
. ToList ( ) ;
return artists1 . Where ( i = > artists2 . Contains ( i , StringComparer . OrdinalIgnoreCase ) ) . Sum ( i = > 5 ) ;
}
}
}
Luke Pulverenti
11 years ago