jellyfin/MediaBrowser.Server.Implementations/Library/LibraryManager.cs

839 lines
32 KiB
C#

using MediaBrowser.Common.Events;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.ScheduledTasks;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.IO;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Resolvers;
using MediaBrowser.Controller.ScheduledTasks;
using MediaBrowser.Controller.Sorting;
using MediaBrowser.Model.Configuration;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Server.Implementations.ScheduledTasks;
using MoreLinq;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using SortOrder = MediaBrowser.Model.Entities.SortOrder;
namespace MediaBrowser.Server.Implementations.Library
{
/// <summary>
/// Class LibraryManager
/// </summary>
public class LibraryManager : ILibraryManager
{
/// <summary>
/// Gets the intro providers.
/// </summary>
/// <value>The intro providers.</value>
private IEnumerable<IIntroProvider> IntroProviders { get; set; }
/// <summary>
/// Gets the list of entity resolution ignore rules
/// </summary>
/// <value>The entity resolution ignore rules.</value>
private IEnumerable<IResolverIgnoreRule> EntityResolutionIgnoreRules { get; set; }
/// <summary>
/// Gets the list of BasePluginFolders added by plugins
/// </summary>
/// <value>The plugin folders.</value>
private IEnumerable<IVirtualFolderCreator> PluginFolderCreators { get; set; }
/// <summary>
/// Gets the list of currently registered entity resolvers
/// </summary>
/// <value>The entity resolvers enumerable.</value>
private IEnumerable<IItemResolver> EntityResolvers { get; set; }
/// <summary>
/// Gets or sets the comparers.
/// </summary>
/// <value>The comparers.</value>
private IEnumerable<IBaseItemComparer> Comparers { get; set; }
#region LibraryChanged Event
/// <summary>
/// Fires whenever any validation routine adds or removes items. The added and removed items are properties of the args.
/// *** Will fire asynchronously. ***
/// </summary>
public event EventHandler<ChildrenChangedEventArgs> LibraryChanged;
/// <summary>
/// Raises the <see cref="E:LibraryChanged" /> event.
/// </summary>
/// <param name="args">The <see cref="ChildrenChangedEventArgs" /> instance containing the event data.</param>
public void ReportLibraryChanged(ChildrenChangedEventArgs args)
{
EventHelper.QueueEventIfNotNull(LibraryChanged, this, args, _logger);
}
#endregion
/// <summary>
/// The _logger
/// </summary>
private readonly ILogger _logger;
/// <summary>
/// The _task manager
/// </summary>
private readonly ITaskManager _taskManager;
/// <summary>
/// The _user manager
/// </summary>
private readonly IUserManager _userManager;
/// <summary>
/// Gets or sets the kernel.
/// </summary>
/// <value>The kernel.</value>
private Kernel Kernel { get; set; }
/// <summary>
/// Gets or sets the configuration manager.
/// </summary>
/// <value>The configuration manager.</value>
private IServerConfigurationManager ConfigurationManager { get; set; }
/// <summary>
/// A collection of items that may be referenced from multiple physical places in the library
/// (typically, multiple user roots). We store them here and be sure they all reference a
/// single instance.
/// </summary>
private ConcurrentDictionary<Guid, BaseItem> ByReferenceItems { get; set; }
/// <summary>
/// Initializes a new instance of the <see cref="LibraryManager" /> class.
/// </summary>
/// <param name="kernel">The kernel.</param>
/// <param name="logger">The logger.</param>
/// <param name="taskManager">The task manager.</param>
/// <param name="userManager">The user manager.</param>
/// <param name="configurationManager">The configuration manager.</param>
public LibraryManager(Kernel kernel, ILogger logger, ITaskManager taskManager, IUserManager userManager, IServerConfigurationManager configurationManager)
{
Kernel = kernel;
_logger = logger;
_taskManager = taskManager;
_userManager = userManager;
ConfigurationManager = configurationManager;
ByReferenceItems = new ConcurrentDictionary<Guid, BaseItem>();
ConfigurationManager.ConfigurationUpdated += kernel_ConfigurationUpdated;
RecordConfigurationValues(configurationManager.Configuration);
}
/// <summary>
/// Adds the parts.
/// </summary>
/// <param name="rules">The rules.</param>
/// <param name="pluginFolders">The plugin folders.</param>
/// <param name="resolvers">The resolvers.</param>
/// <param name="introProviders">The intro providers.</param>
/// <param name="itemComparers">The item comparers.</param>
public void AddParts(IEnumerable<IResolverIgnoreRule> rules, IEnumerable<IVirtualFolderCreator> pluginFolders, IEnumerable<IItemResolver> resolvers, IEnumerable<IIntroProvider> introProviders, IEnumerable<IBaseItemComparer> itemComparers)
{
EntityResolutionIgnoreRules = rules;
PluginFolderCreators = pluginFolders;
EntityResolvers = resolvers.OrderBy(i => i.Priority).ToArray();
IntroProviders = introProviders;
Comparers = itemComparers;
}
/// <summary>
/// The _root folder
/// </summary>
private AggregateFolder _rootFolder;
/// <summary>
/// The _root folder sync lock
/// </summary>
private object _rootFolderSyncLock = new object();
/// <summary>
/// The _root folder initialized
/// </summary>
private bool _rootFolderInitialized;
/// <summary>
/// Gets the root folder.
/// </summary>
/// <value>The root folder.</value>
public AggregateFolder RootFolder
{
get
{
LazyInitializer.EnsureInitialized(ref _rootFolder, ref _rootFolderInitialized, ref _rootFolderSyncLock, CreateRootFolder);
return _rootFolder;
}
private set
{
_rootFolder = value;
if (value == null)
{
_rootFolderInitialized = false;
}
}
}
private bool _internetProvidersEnabled;
private bool _peopleImageFetchingEnabled;
private void RecordConfigurationValues(ServerConfiguration configuration)
{
_internetProvidersEnabled = configuration.EnableInternetProviders;
_peopleImageFetchingEnabled = configuration.InternetProviderExcludeTypes == null || !configuration.InternetProviderExcludeTypes.Contains(typeof(Person).Name, StringComparer.OrdinalIgnoreCase);
}
/// <summary>
/// Handles the ConfigurationUpdated event of the kernel control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
void kernel_ConfigurationUpdated(object sender, EventArgs e)
{
var config = ConfigurationManager.Configuration;
// Figure out whether or not we should refresh people after the update is finished
var refreshPeopleAfterUpdate = !_internetProvidersEnabled && config.EnableInternetProviders;
// This is true if internet providers has just been turned on, or if People have just been removed from InternetProviderExcludeTypes
if (!refreshPeopleAfterUpdate)
{
var newConfigurationFetchesPeopleImages = config.InternetProviderExcludeTypes == null || !config.InternetProviderExcludeTypes.Contains(typeof(Person).Name, StringComparer.OrdinalIgnoreCase);
refreshPeopleAfterUpdate = newConfigurationFetchesPeopleImages && !_peopleImageFetchingEnabled;
}
RecordConfigurationValues(config);
Task.Run(() =>
{
// Any number of configuration settings could change the way the library is refreshed, so do that now
_taskManager.CancelIfRunningAndQueue<RefreshMediaLibraryTask>();
if (refreshPeopleAfterUpdate)
{
_taskManager.CancelIfRunningAndQueue<PeopleValidationTask>();
}
});
}
/// <summary>
/// Resolves the item.
/// </summary>
/// <param name="args">The args.</param>
/// <returns>BaseItem.</returns>
public BaseItem ResolveItem(ItemResolveArgs args)
{
var item = EntityResolvers.Select(r => r.ResolvePath(args)).FirstOrDefault(i => i != null);
if (item != null)
{
ResolverHelper.SetInitialItemValues(item, args);
// Now handle the issue with posibly having the same item referenced from multiple physical
// places within the library. Be sure we always end up with just one instance.
if (item is IByReferenceItem)
{
item = GetOrAddByReferenceItem(item);
}
}
return item;
}
/// <summary>
/// Ensure supplied item has only one instance throughout
/// </summary>
/// <param name="item"></param>
/// <returns>The proper instance to the item</returns>
public BaseItem GetOrAddByReferenceItem(BaseItem item)
{
// Add this item to our list if not there already
if (!ByReferenceItems.TryAdd(item.Id, item))
{
// Already there - return the existing reference
item = ByReferenceItems[item.Id];
}
return item;
}
/// <summary>
/// Resolves a path into a BaseItem
/// </summary>
/// <param name="path">The path.</param>
/// <param name="parent">The parent.</param>
/// <param name="fileInfo">The file info.</param>
/// <returns>BaseItem.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public BaseItem ResolvePath(string path, Folder parent = null, WIN32_FIND_DATA? fileInfo = null)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException();
}
fileInfo = fileInfo ?? FileSystem.GetFileData(path);
if (!fileInfo.HasValue)
{
return null;
}
var args = new ItemResolveArgs(ConfigurationManager.ApplicationPaths)
{
Parent = parent,
Path = path,
FileInfo = fileInfo.Value
};
// Return null if ignore rules deem that we should do so
if (EntityResolutionIgnoreRules.Any(r => r.ShouldIgnore(args)))
{
return null;
}
// Gather child folder and files
if (args.IsDirectory)
{
// When resolving the root, we need it's grandchildren (children of user views)
var flattenFolderDepth = args.IsPhysicalRoot ? 2 : 0;
args.FileSystemDictionary = FileData.GetFilteredFileSystemEntries(args.Path, _logger, flattenFolderDepth: flattenFolderDepth, args: args);
}
// Check to see if we should resolve based on our contents
if (args.IsDirectory && !ShouldResolvePathContents(args))
{
return null;
}
return ResolveItem(args);
}
/// <summary>
/// Determines whether a path should be ignored based on its contents - called after the contents have been read
/// </summary>
/// <param name="args">The args.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
private static bool ShouldResolvePathContents(ItemResolveArgs args)
{
// Ignore any folders containing a file called .ignore
return !args.ContainsFileSystemEntryByName(".ignore");
}
/// <summary>
/// Resolves a set of files into a list of BaseItem
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="files">The files.</param>
/// <param name="parent">The parent.</param>
/// <returns>List{``0}.</returns>
public List<T> ResolvePaths<T>(IEnumerable<WIN32_FIND_DATA> files, Folder parent)
where T : BaseItem
{
var list = new List<T>();
Parallel.ForEach(files, f =>
{
try
{
var item = ResolvePath(f.Path, parent, f) as T;
if (item != null)
{
lock (list)
{
list.Add(item);
}
}
}
catch (Exception ex)
{
_logger.ErrorException("Error resolving path {0}", ex, f.Path);
}
});
return list;
}
/// <summary>
/// Creates the root media folder
/// </summary>
/// <returns>AggregateFolder.</returns>
/// <exception cref="System.InvalidOperationException">Cannot create the root folder until plugins have loaded</exception>
public AggregateFolder CreateRootFolder()
{
var rootFolderPath = ConfigurationManager.ApplicationPaths.RootFolderPath;
var rootFolder = Kernel.ItemRepository.RetrieveItem(rootFolderPath.GetMBId(typeof(AggregateFolder))) as AggregateFolder ?? (AggregateFolder)ResolvePath(rootFolderPath);
// Add in the plug-in folders
foreach (var child in PluginFolderCreators)
{
rootFolder.AddVirtualChild(child.GetFolder());
}
return rootFolder;
}
/// <summary>
/// Gets a Person
/// </summary>
/// <param name="name">The name.</param>
/// <param name="allowSlowProviders">if set to <c>true</c> [allow slow providers].</param>
/// <returns>Task{Person}.</returns>
public Task<Person> GetPerson(string name, bool allowSlowProviders = false)
{
return GetPerson(name, CancellationToken.None, allowSlowProviders);
}
/// <summary>
/// Gets a Person
/// </summary>
/// <param name="name">The name.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="allowSlowProviders">if set to <c>true</c> [allow slow providers].</param>
/// <returns>Task{Person}.</returns>
private Task<Person> GetPerson(string name, CancellationToken cancellationToken, bool allowSlowProviders = false)
{
return GetImagesByNameItem<Person>(ConfigurationManager.ApplicationPaths.PeoplePath, name, cancellationToken, allowSlowProviders);
}
/// <summary>
/// Gets a Studio
/// </summary>
/// <param name="name">The name.</param>
/// <param name="allowSlowProviders">if set to <c>true</c> [allow slow providers].</param>
/// <returns>Task{Studio}.</returns>
public Task<Studio> GetStudio(string name, bool allowSlowProviders = false)
{
return GetImagesByNameItem<Studio>(ConfigurationManager.ApplicationPaths.StudioPath, name, CancellationToken.None, allowSlowProviders);
}
/// <summary>
/// Gets a Genre
/// </summary>
/// <param name="name">The name.</param>
/// <param name="allowSlowProviders">if set to <c>true</c> [allow slow providers].</param>
/// <returns>Task{Genre}.</returns>
public Task<Genre> GetGenre(string name, bool allowSlowProviders = false)
{
return GetImagesByNameItem<Genre>(ConfigurationManager.ApplicationPaths.GenrePath, name, CancellationToken.None, allowSlowProviders);
}
/// <summary>
/// The us culture
/// </summary>
private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
/// <summary>
/// Gets a Year
/// </summary>
/// <param name="value">The value.</param>
/// <param name="allowSlowProviders">if set to <c>true</c> [allow slow providers].</param>
/// <returns>Task{Year}.</returns>
/// <exception cref="System.ArgumentOutOfRangeException"></exception>
public Task<Year> GetYear(int value, bool allowSlowProviders = false)
{
if (value <= 0)
{
throw new ArgumentOutOfRangeException();
}
return GetImagesByNameItem<Year>(ConfigurationManager.ApplicationPaths.YearPath, value.ToString(UsCulture), CancellationToken.None, allowSlowProviders);
}
/// <summary>
/// The images by name item cache
/// </summary>
private readonly ConcurrentDictionary<string, object> ImagesByNameItemCache = new ConcurrentDictionary<string, object>(StringComparer.OrdinalIgnoreCase);
/// <summary>
/// Generically retrieves an IBN item
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="path">The path.</param>
/// <param name="name">The name.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="allowSlowProviders">if set to <c>true</c> [allow slow providers].</param>
/// <returns>Task{``0}.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
private Task<T> GetImagesByNameItem<T>(string path, string name, CancellationToken cancellationToken, bool allowSlowProviders = true)
where T : BaseItem, new()
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException();
}
if (string.IsNullOrEmpty(name))
{
throw new ArgumentNullException();
}
var key = Path.Combine(path, FileSystem.GetValidFilename(name));
var obj = ImagesByNameItemCache.GetOrAdd(key, keyname => CreateImagesByNameItem<T>(path, name, cancellationToken, allowSlowProviders));
return obj as Task<T>;
}
/// <summary>
/// Creates an IBN item based on a given path
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="path">The path.</param>
/// <param name="name">The name.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="allowSlowProviders">if set to <c>true</c> [allow slow providers].</param>
/// <returns>Task{``0}.</returns>
/// <exception cref="System.IO.IOException">Path not created: + path</exception>
private async Task<T> CreateImagesByNameItem<T>(string path, string name, CancellationToken cancellationToken, bool allowSlowProviders = true)
where T : BaseItem, new()
{
cancellationToken.ThrowIfCancellationRequested();
_logger.Debug("Creating {0}: {1}", typeof(T).Name, name);
path = Path.Combine(path, FileSystem.GetValidFilename(name));
var fileInfo = FileSystem.GetFileData(path);
var isNew = false;
if (!fileInfo.HasValue)
{
Directory.CreateDirectory(path);
fileInfo = FileSystem.GetFileData(path);
if (!fileInfo.HasValue)
{
throw new IOException("Path not created: " + path);
}
isNew = true;
}
cancellationToken.ThrowIfCancellationRequested();
var id = path.GetMBId(typeof(T));
var item = Kernel.ItemRepository.RetrieveItem(id) as T;
if (item == null)
{
item = new T
{
Name = name,
Id = id,
DateCreated = fileInfo.Value.CreationTimeUtc,
DateModified = fileInfo.Value.LastWriteTimeUtc,
Path = path
};
isNew = true;
}
cancellationToken.ThrowIfCancellationRequested();
// Set this now so we don't cause additional file system access during provider executions
item.ResetResolveArgs(fileInfo);
await item.RefreshMetadata(cancellationToken, isNew, allowSlowProviders: allowSlowProviders).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
return item;
}
/// <summary>
/// Validate and refresh the People sub-set of the IBN.
/// The items are stored in the db but not loaded into memory until actually requested by an operation.
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="progress">The progress.</param>
/// <returns>Task.</returns>
public async Task ValidatePeople(CancellationToken cancellationToken, IProgress<double> progress)
{
// Clear the IBN cache
ImagesByNameItemCache.Clear();
const int maxTasks = 250;
var tasks = new List<Task>();
var includedPersonTypes = new[] { PersonType.Actor, PersonType.Director };
var people = RootFolder.RecursiveChildren
.Where(c => c.People != null)
.SelectMany(c => c.People.Where(p => includedPersonTypes.Contains(p.Type)))
.DistinctBy(p => p.Name, StringComparer.OrdinalIgnoreCase)
.ToList();
var numComplete = 0;
foreach (var person in people)
{
if (tasks.Count > maxTasks)
{
await Task.WhenAll(tasks).ConfigureAwait(false);
tasks.Clear();
// Safe cancellation point, when there are no pending tasks
cancellationToken.ThrowIfCancellationRequested();
}
// Avoid accessing the foreach variable within the closure
var currentPerson = person;
tasks.Add(Task.Run(async () =>
{
cancellationToken.ThrowIfCancellationRequested();
try
{
await GetPerson(currentPerson.Name, cancellationToken, allowSlowProviders: true).ConfigureAwait(false);
}
catch (IOException ex)
{
_logger.ErrorException("Error validating IBN entry {0}", ex, currentPerson.Name);
}
// Update progress
lock (progress)
{
numComplete++;
double percent = numComplete;
percent /= people.Count;
progress.Report(100 * percent);
}
}));
}
await Task.WhenAll(tasks).ConfigureAwait(false);
progress.Report(100);
_logger.Info("People validation complete");
}
/// <summary>
/// Reloads the root media folder
/// </summary>
/// <param name="progress">The progress.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
public async Task ValidateMediaLibrary(IProgress<double> progress, CancellationToken cancellationToken)
{
_logger.Info("Validating media library");
await RootFolder.RefreshMetadata(cancellationToken).ConfigureAwait(false);
// Start by just validating the children of the root, but go no further
await RootFolder.ValidateChildren(new Progress<double> { }, cancellationToken, recursive: false);
// Validate only the collection folders for each user, just to make them available as quickly as possible
var userCollectionFolderTasks = _userManager.Users.AsParallel().Select(user => user.ValidateCollectionFolders(new Progress<double> { }, cancellationToken));
await Task.WhenAll(userCollectionFolderTasks).ConfigureAwait(false);
// Now validate the entire media library
await RootFolder.ValidateChildren(progress, cancellationToken, recursive: true).ConfigureAwait(false);
//foreach (var user in _userManager.Users)
//{
// await user.ValidateMediaLibrary(new Progress<double> { }, cancellationToken).ConfigureAwait(false);
//}
}
/// <summary>
/// Saves display preferences for a Folder
/// </summary>
/// <param name="user">The user.</param>
/// <param name="folder">The folder.</param>
/// <param name="data">The data.</param>
/// <returns>Task.</returns>
public Task SaveDisplayPreferencesForFolder(User user, Folder folder, DisplayPreferences data)
{
// Need to update all items with the same DisplayPreferencesId
foreach (var child in RootFolder.GetRecursiveChildren(user)
.OfType<Folder>()
.Where(i => i.DisplayPreferencesId == folder.DisplayPreferencesId))
{
child.AddOrUpdateDisplayPreferences(user, data);
}
return Kernel.DisplayPreferencesRepository.SaveDisplayPreferences(folder, CancellationToken.None);
}
/// <summary>
/// Gets the default view.
/// </summary>
/// <returns>IEnumerable{VirtualFolderInfo}.</returns>
public IEnumerable<VirtualFolderInfo> GetDefaultVirtualFolders()
{
return GetView(ConfigurationManager.ApplicationPaths.DefaultUserViewsPath);
}
/// <summary>
/// Gets the view.
/// </summary>
/// <param name="user">The user.</param>
/// <returns>IEnumerable{VirtualFolderInfo}.</returns>
public IEnumerable<VirtualFolderInfo> GetVirtualFolders(User user)
{
return GetView(user.RootFolderPath);
}
/// <summary>
/// Gets the view.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>IEnumerable{VirtualFolderInfo}.</returns>
private IEnumerable<VirtualFolderInfo> GetView(string path)
{
return Directory.EnumerateDirectories(path, "*", SearchOption.TopDirectoryOnly)
.Select(dir => new VirtualFolderInfo
{
Name = Path.GetFileName(dir),
Locations = Directory.EnumerateFiles(dir, "*.lnk", SearchOption.TopDirectoryOnly).Select(FileSystem.ResolveShortcut).ToList()
});
}
/// <summary>
/// Finds a library item by Id and UserId.
/// </summary>
/// <param name="id">The id.</param>
/// <param name="userId">The user id.</param>
/// <param name="userManager">The user manager.</param>
/// <returns>BaseItem.</returns>
/// <exception cref="System.ArgumentNullException">id</exception>
public BaseItem GetItemById(Guid id, Guid userId)
{
if (id == Guid.Empty)
{
throw new ArgumentNullException("id");
}
if (userId == Guid.Empty)
{
throw new ArgumentNullException("userId");
}
var user = _userManager.GetUserById(userId);
var userRoot = user.RootFolder;
return userRoot.FindItemById(id, user);
}
/// <summary>
/// Gets the item by id.
/// </summary>
/// <param name="id">The id.</param>
/// <returns>BaseItem.</returns>
/// <exception cref="System.ArgumentNullException">id</exception>
public BaseItem GetItemById(Guid id)
{
if (id == Guid.Empty)
{
throw new ArgumentNullException("id");
}
return RootFolder.FindItemById(id, null);
}
/// <summary>
/// Gets the intros.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="user">The user.</param>
/// <returns>IEnumerable{System.String}.</returns>
public IEnumerable<string> GetIntros(BaseItem item, User user)
{
return IntroProviders.SelectMany(i => i.GetIntros(item, user));
}
/// <summary>
/// Sorts the specified sort by.
/// </summary>
/// <param name="items">The items.</param>
/// <param name="user">The user.</param>
/// <param name="sortBy">The sort by.</param>
/// <param name="sortOrder">The sort order.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
public IEnumerable<BaseItem> Sort(IEnumerable<BaseItem> items, User user, IEnumerable<string> sortBy, SortOrder sortOrder)
{
var isFirst = true;
IOrderedEnumerable<BaseItem> orderedItems = null;
foreach (var orderBy in sortBy.Select(o => GetComparer(o, user)).Where(c => c != null))
{
if (isFirst)
{
orderedItems = sortOrder == SortOrder.Descending ? items.OrderByDescending(i => i, orderBy) : items.OrderBy(i => i, orderBy);
}
else
{
orderedItems = sortOrder == SortOrder.Descending ? orderedItems.ThenByDescending(i => i, orderBy) : orderedItems.ThenBy(i => i, orderBy);
}
isFirst = false;
}
return orderedItems ?? items;
}
/// <summary>
/// Gets the comparer.
/// </summary>
/// <param name="name">The name.</param>
/// <param name="user">The user.</param>
/// <returns>IBaseItemComparer.</returns>
private IBaseItemComparer GetComparer(string name, User user)
{
var comparer = Comparers.FirstOrDefault(c => string.Equals(name, c.Name, StringComparison.OrdinalIgnoreCase));
if (comparer != null)
{
// If it requires a user, create a new one, and assign the user
if (comparer is IUserBaseItemComparer)
{
var userComparer = (IUserBaseItemComparer)Activator.CreateInstance(comparer.GetType());
userComparer.User = user;
return userComparer;
}
}
return comparer;
}
/// <summary>
/// Sorts the specified items.
/// </summary>
/// <param name="items">The items.</param>
/// <param name="searchTerm">The search term.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
public IEnumerable<BaseItem> Search(IEnumerable<BaseItem> items, string searchTerm)
{
if (string.IsNullOrEmpty(searchTerm))
{
throw new ArgumentNullException("searchTerm");
}
return items.Where(i => i.Name.StartsWith(searchTerm, StringComparison.OrdinalIgnoreCase));
}
}
}