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using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using MediaBrowser.Server.Implementations.HttpServer;
using ServiceStack.ServiceHost;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
namespace MediaBrowser.Api.UserLibrary
{
/// <summary>
/// Class BaseItemsByNameService
/// </summary>
/// <typeparam name="TItemType">The type of the T item type.</typeparam>
public abstract class BaseItemsByNameService<TItemType> : BaseRestService
where TItemType : BaseItem
{
/// <summary>
/// The _user manager
/// </summary>
protected readonly IUserManager UserManager;
protected readonly ILibraryManager LibraryManager;
/// <summary>
/// Initializes a new instance of the <see cref="BaseItemsByNameService{TItemType}" /> class.
/// </summary>
/// <param name="userManager">The user manager.</param>
protected BaseItemsByNameService(IUserManager userManager, ILibraryManager libraryManager)
{
UserManager = userManager;
LibraryManager = libraryManager;
}
/// <summary>
/// Gets the specified request.
/// </summary>
/// <param name="request">The request.</param>
/// <returns>Task{ItemsResult}.</returns>
protected async Task<ItemsResult> GetResult(GetItemsByName request)
{
var user = UserManager.GetUserById(request.UserId);
var item = string.IsNullOrEmpty(request.Id) ? user.RootFolder : DtoBuilder.GetItemByClientId(request.Id, UserManager, LibraryManager, user.Id);
IEnumerable<BaseItem> items;
if (item.IsFolder)
{
var folder = (Folder)item;
items = request.Recursive ? folder.GetRecursiveChildren(user) : folder.GetChildren(user);
}
else
{
items = new[] { item };
}
var ibnItemsArray = GetAllItems(request, items, user).ToArray();
IEnumerable<Tuple<string, Func<int>>> ibnItems = ibnItemsArray;
var result = new ItemsResult
{
TotalRecordCount = ibnItemsArray.Length
};
if (request.StartIndex.HasValue || request.Limit.HasValue)
{
if (request.StartIndex.HasValue)
{
ibnItems = ibnItems.Skip(request.StartIndex.Value);
}
if (request.Limit.HasValue)
{
ibnItems = ibnItems.Take(request.Limit.Value);
}
}
var fields = GetItemFields(request).ToList();
var tasks = ibnItems.Select(i => GetDto(i, user, fields));
var resultItems = await Task.WhenAll(tasks).ConfigureAwait(false);
result.Items = resultItems.Where(i => i != null).ToArray();
return result;
}
/// <summary>
/// Gets the item fields.
/// </summary>
/// <param name="request">The request.</param>
/// <returns>IEnumerable{ItemFields}.</returns>
private IEnumerable<ItemFields> GetItemFields(GetItemsByName request)
{
var val = request.Fields;
if (string.IsNullOrEmpty(val))
{
return new ItemFields[] { };
}
return val.Split(',').Select(v => (ItemFields)Enum.Parse(typeof(ItemFields), v, true));
}
/// <summary>
/// Gets all items.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="items">The items.</param>
/// <param name="user">The user.</param>
/// <returns>IEnumerable{Tuple{System.StringFunc{System.Int32}}}.</returns>
protected abstract IEnumerable<Tuple<string, Func<int>>> GetAllItems(GetItemsByName request, IEnumerable<BaseItem> items, User user);
/// <summary>
/// Gets the entity.
/// </summary>
/// <param name="name">The name.</param>
/// <returns>Task{BaseItem}.</returns>
protected abstract Task<TItemType> GetEntity(string name);
/// <summary>
/// Gets the dto.
/// </summary>
/// <param name="stub">The stub.</param>
/// <param name="user">The user.</param>
/// <param name="fields">The fields.</param>
/// <returns>Task{DtoBaseItem}.</returns>
private async Task<BaseItemDto> GetDto(Tuple<string, Func<int>> stub, User user, List<ItemFields> fields)
{
BaseItem item;
try
{
item = await GetEntity(stub.Item1).ConfigureAwait(false);
}
catch (IOException ex)
{
Logger.ErrorException("Error getting IBN item {0}", ex, stub.Item1);
return null;
}
var dto = await new DtoBuilder(Logger).GetBaseItemDto(item, user, fields, LibraryManager).ConfigureAwait(false);
dto.ChildCount = stub.Item2();
return dto;
}
}
/// <summary>
/// Class GetItemsByName
/// </summary>
public class GetItemsByName : IReturn<ItemsResult>
{
/// <summary>
/// Gets or sets the user id.
/// </summary>
/// <value>The user id.</value>
[ApiMember(Name = "UserId", Description = "User Id", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "GET")]
public Guid UserId { get; set; }
/// <summary>
/// Gets or sets the start index.
/// </summary>
/// <value>The start index.</value>
[ApiMember(Name = "StartIndex", Description = "Optional. The record index to start at. All items with a lower index will be dropped from the results.", IsRequired = false, DataType = "int", ParameterType = "query", Verb = "GET")]
public int? StartIndex { get; set; }
/// <summary>
/// Gets or sets the size of the page.
/// </summary>
/// <value>The size of the page.</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>
/// Gets or sets a value indicating whether this <see cref="GetItemsByName" /> is recursive.
/// </summary>
/// <value><c>true</c> if recursive; otherwise, <c>false</c>.</value>
[ApiMember(Name = "Recursive", Description = "When searching within folders, this determines whether or not the search will be recursive. true/false", IsRequired = false, DataType = "boolean", ParameterType = "query", Verb = "GET")]
public bool Recursive { get; set; }
/// <summary>
/// Gets or sets the sort order.
/// </summary>
/// <value>The sort order.</value>
[ApiMember(Name = "SortOrder", Description = "Sort Order - Ascending,Descending", IsRequired = false, DataType = "string", ParameterType = "query", Verb = "GET")]
public SortOrder? SortOrder { get; set; }
/// <summary>
/// If specified the search will be localized within a specific item or folder
/// </summary>
/// <value>The item id.</value>
[ApiMember(Name = "Id", Description = "If specified the search will be localized within a specific item or folder", IsRequired = false, DataType = "string", ParameterType = "query", Verb = "GET")]
public string Id { get; set; }
/// <summary>
/// Fields to return within the items, in addition to basic information
/// </summary>
/// <value>The fields.</value>
public string Fields { get; set; }
}
}
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