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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using MediaBrowser.Common.Net.Handlers;
using MediaBrowser.Controller;
using MediaBrowser.Model.DTO;
using MediaBrowser.Model.Entities;
namespace MediaBrowser.Api.HttpHandlers
{
public class GenresHandler : BaseSerializationHandler<IEnumerable<IBNItem>>
{
protected override Task<IEnumerable<IBNItem>> GetObjectToSerialize()
{
Folder parent = ApiService.GetItemById(QueryString["id"]) as Folder;
Guid userId = Guid.Parse(QueryString["userid"]);
User user = Kernel.Instance.Users.First(u => u.Id == userId);
return GetAllGenres(parent, user);
}
/// <summary>
/// Gets all genres from all recursive children of a folder
/// The CategoryInfo class is used to keep track of the number of times each genres appears
/// </summary>
private async Task<IEnumerable<IBNItem>> GetAllGenres(Folder parent, User user)
{
Dictionary<string, int> data = new Dictionary<string, int>();
// Get all the allowed recursive children
IEnumerable<BaseItem> allItems = parent.GetParentalAllowedRecursiveChildren(user);
foreach (var item in allItems)
{
// Add each genre from the item to the data dictionary
// If the genre already exists, increment the count
if (item.Genres == null)
{
continue;
}
foreach (string val in item.Genres)
{
if (!data.ContainsKey(val))
{
data.Add(val, 1);
}
else
{
data[val]++;
}
}
}
IEnumerable<Genre> entities = await Task.WhenAll<Genre>(data.Keys.Select(key => { return Kernel.Instance.ItemController.GetGenre(key); })).ConfigureAwait(false);
return entities.Select(e => ApiService.GetIBNItem(e, data[e.Name]));
}
}
}
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