display similar items on detail page

pull/702/head
Luke Pulverenti 12 years ago
parent 10fcb118d7
commit 56836ed004

@ -6,6 +6,7 @@ using MediaBrowser.Controller.Entities.TV;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Querying;
using ServiceStack.ServiceHost;
using System;
@ -103,6 +104,32 @@ 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>
@ -276,5 +303,183 @@ namespace MediaBrowser.Api
return ToOptimizedResult(result);
}
/// <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 a point if they came out within the same decade
if (diff < 10)
{
points += 1;
}
// And another if within five years
if (diff < 5)
{
points += 1;
}
}
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);
}
}
}

@ -257,6 +257,17 @@ MediaBrowser.ApiClient = function ($, navigator, JSON, WebSocket, setTimeout) {
});
};
self.getSimilarItems = function (itemId, options) {
var url = self.getUrl("Items/" + itemId + "/Similar", options);
return self.ajax({
type: "GET",
url: url,
dataType: "json"
});
};
/**
* Gets all cultures known to the server
*/

@ -1,6 +1,6 @@
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="MediaBrowser.ApiClient.Javascript" version="3.0.112" targetFramework="net45" />
<package id="MediaBrowser.ApiClient.Javascript" version="3.0.114" targetFramework="net45" />
<package id="ServiceStack.Common" version="3.9.45" targetFramework="net45" />
<package id="ServiceStack.Text" version="3.9.45" targetFramework="net45" />
</packages>
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