using MediaBrowser.Model.Entities;
using MediaBrowser.Controller.IO;
using MediaBrowser.Controller.Library;
using MediaBrowser.Common.Logging;
using MediaBrowser.Controller.Resolvers;
using System;
using System.Threading.Tasks;
using System.Collections.Generic;
using System.Linq;
namespace MediaBrowser.Controller.Entities
{
public class Folder : BaseItem
{
#region Events
///
/// Fires whenever a validation routine updates our children. The added and removed children are properties of the args.
/// *** Will fire asynchronously. ***
///
public event EventHandler ChildrenChanged;
protected void OnChildrenChanged(ChildrenChangedEventArgs args)
{
if (ChildrenChanged != null)
{
Task.Run( () => ChildrenChanged(this, args));
}
}
#endregion
public IEnumerable PhysicalLocations { get; set; }
public override bool IsFolder
{
get
{
return true;
}
}
public bool IsRoot { get; set; }
public bool IsVirtualFolder
{
get
{
return Parent != null && Parent.IsRoot;
}
}
protected object childLock = new object();
protected List children;
protected virtual List ActualChildren
{
get
{
if (children == null)
{
LoadChildren();
}
return children;
}
set
{
children = value;
}
}
///
/// thread-safe access to the actual children of this folder - without regard to user
///
public IEnumerable Children
{
get
{
lock (childLock)
return ActualChildren.ToList();
}
}
///
/// thread-safe access to all recursive children of this folder - without regard to user
///
public IEnumerable RecursiveChildren
{
get
{
foreach (var item in Children)
{
yield return item;
var subFolder = item as Folder;
if (subFolder != null)
{
foreach (var subitem in subFolder.RecursiveChildren)
{
yield return subitem;
}
}
}
}
}
///
/// Loads and validates our children
///
protected virtual void LoadChildren()
{
//first - load our children from the repo
lock (childLock)
children = GetCachedChildren();
//then kick off a validation against the actual file system
Task.Run(() => ValidateChildren());
}
protected bool ChildrenValidating = false;
///
/// Compare our current children (presumably just read from the repo) with the current state of the file system and adjust for any changes
/// ***Currently does not contain logic to maintain items that are unavailable in the file system***
///
///
protected async virtual void ValidateChildren()
{
if (ChildrenValidating) return; //only ever want one of these going at once and don't want them to fire off in sequence so don't use lock
ChildrenValidating = true;
bool changed = false; //this will save us a little time at the end if nothing changes
var changedArgs = new ChildrenChangedEventArgs(this);
//get the current valid children from filesystem (or wherever)
var nonCachedChildren = await GetNonCachedChildren();
if (nonCachedChildren == null) return; //nothing to validate
//build a dictionary of the current children we have now by Id so we can compare quickly and easily
Dictionary currentChildren;
lock (childLock)
currentChildren = ActualChildren.ToDictionary(i => i.Id);
//create a list for our validated children
var validChildren = new List();
//now traverse the valid children and find any changed or new items
foreach (var child in nonCachedChildren)
{
BaseItem currentChild;
currentChildren.TryGetValue(child.Id, out currentChild);
if (currentChild == null)
{
//brand new item - needs to be added
changed = true;
changedArgs.ItemsAdded.Add(child);
//Logger.LogInfo("New Item Added to Library: ("+child.GetType().Name+")"+ child.Name + "(" + child.Path + ")");
//refresh it
child.RefreshMetadata();
//save it in repo...
//and add it to our valid children
validChildren.Add(child);
//fire an added event...?
//if it is a folder we need to validate its children as well
Folder folder = child as Folder;
if (folder != null)
{
folder.ValidateChildren();
//probably need to refresh too...
}
}
else
{
//existing item - check if it has changed
if (currentChild.IsChanged(child))
{
changed = true;
currentChild.RefreshMetadata();
//save it in repo...
validChildren.Add(currentChild);
}
else
{
//current child that didn't change - just put it in the valid children
validChildren.Add(currentChild);
}
}
}
//that's all the new and changed ones - now see if there are any that are missing
changedArgs.ItemsRemoved = currentChildren.Values.Except(validChildren);
changed |= changedArgs.ItemsRemoved != null;
//now, if anything changed - replace our children
if (changed)
{
lock (childLock)
ActualChildren = validChildren;
//and save children in repo...
//and fire event
this.OnChildrenChanged(changedArgs);
}
ChildrenValidating = false;
}
///
/// Get the children of this folder from the actual file system
///
///
protected async virtual Task> GetNonCachedChildren()
{
ItemResolveEventArgs args = new ItemResolveEventArgs()
{
FileInfo = FileData.GetFileData(this.Path),
Parent = this.Parent,
Cancel = false,
Path = this.Path
};
// Gather child folder and files
if (args.IsDirectory)
{
args.FileSystemChildren = FileData.GetFileSystemEntries(this.Path, "*").ToArray();
bool isVirtualFolder = Parent != null && Parent.IsRoot;
args = FileSystemHelper.FilterChildFileSystemEntries(args, isVirtualFolder);
}
else
{
Logger.LogError("Folder has a path that is not a directory: " + this.Path);
return null;
}
if (!EntityResolutionHelper.ShouldResolvePathContents(args))
{
return null;
}
return (await Task.WhenAll(GetChildren(args.FileSystemChildren)).ConfigureAwait(false))
.Where(i => i != null).OrderBy(f =>
{
return string.IsNullOrEmpty(f.SortName) ? f.Name : f.SortName;
});
}
///
/// Resolves a path into a BaseItem
///
protected async Task GetChild(string path, WIN32_FIND_DATA? fileInfo = null)
{
ItemResolveEventArgs args = new ItemResolveEventArgs()
{
FileInfo = fileInfo ?? FileData.GetFileData(path),
Parent = this,
Cancel = false,
Path = path
};
args.FileSystemChildren = FileData.GetFileSystemEntries(path, "*").ToArray();
args = FileSystemHelper.FilterChildFileSystemEntries(args, false);
return Kernel.Instance.ResolveItem(args);
}
///
/// Finds child BaseItems for a given Folder
///
protected Task[] GetChildren(WIN32_FIND_DATA[] fileSystemChildren)
{
Task[] tasks = new Task[fileSystemChildren.Length];
for (int i = 0; i < fileSystemChildren.Length; i++)
{
var child = fileSystemChildren[i];
tasks[i] = GetChild(child.Path, child);
}
return tasks;
}
///
/// Get our children from the repo - stubbed for now
///
///
protected virtual List GetCachedChildren()
{
return new List();
}
///
/// Gets allowed children of an item
///
public IEnumerable GetChildren(User user)
{
return ActualChildren.Where(c => c.IsParentalAllowed(user));
}
///
/// Gets allowed recursive children of an item
///
public IEnumerable GetRecursiveChildren(User user)
{
foreach (var item in GetChildren(user))
{
yield return item;
var subFolder = item as Folder;
if (subFolder != null)
{
foreach (var subitem in subFolder.GetRecursiveChildren(user))
{
yield return subitem;
}
}
}
}
///
/// Since it can be slow to make all of these calculations at once, this method will provide a way to get them all back together
///
public ItemSpecialCounts GetSpecialCounts(User user)
{
ItemSpecialCounts counts = new ItemSpecialCounts();
IEnumerable recursiveChildren = GetRecursiveChildren(user);
counts.RecentlyAddedItemCount = GetRecentlyAddedItems(recursiveChildren, user).Count();
counts.RecentlyAddedUnPlayedItemCount = GetRecentlyAddedUnplayedItems(recursiveChildren, user).Count();
counts.InProgressItemCount = GetInProgressItems(recursiveChildren, user).Count();
counts.PlayedPercentage = GetPlayedPercentage(recursiveChildren, user);
return counts;
}
///
/// Finds all recursive items within a top-level parent that contain the given genre and are allowed for the current user
///
public IEnumerable GetItemsWithGenre(string genre, User user)
{
return GetRecursiveChildren(user).Where(f => f.Genres != null && f.Genres.Any(s => s.Equals(genre, StringComparison.OrdinalIgnoreCase)));
}
///
/// Finds all recursive items within a top-level parent that contain the given year and are allowed for the current user
///
public IEnumerable GetItemsWithYear(int year, User user)
{
return GetRecursiveChildren(user).Where(f => f.ProductionYear.HasValue && f.ProductionYear == year);
}
///
/// Finds all recursive items within a top-level parent that contain the given studio and are allowed for the current user
///
public IEnumerable GetItemsWithStudio(string studio, User user)
{
return GetRecursiveChildren(user).Where(f => f.Studios != null && f.Studios.Any(s => s.Equals(studio, StringComparison.OrdinalIgnoreCase)));
}
///
/// Finds all recursive items within a top-level parent that the user has marked as a favorite
///
public IEnumerable GetFavoriteItems(User user)
{
return GetRecursiveChildren(user).Where(c =>
{
UserItemData data = c.GetUserData(user, false);
if (data != null)
{
return data.IsFavorite;
}
return false;
});
}
///
/// Finds all recursive items within a top-level parent that contain the given person and are allowed for the current user
///
public IEnumerable GetItemsWithPerson(string person, User user)
{
return GetRecursiveChildren(user).Where(c =>
{
if (c.People != null)
{
return c.People.ContainsKey(person);
}
return false;
});
}
///
/// Finds all recursive items within a top-level parent that contain the given person and are allowed for the current user
///
/// Specify this to limit results to a specific PersonType
public IEnumerable GetItemsWithPerson(string person, string personType, User user)
{
return GetRecursiveChildren(user).Where(c =>
{
if (c.People != null)
{
return c.People.ContainsKey(person) && c.People[person].Type.Equals(personType, StringComparison.OrdinalIgnoreCase);
}
return false;
});
}
///
/// Gets all recently added items (recursive) within a folder, based on configuration and parental settings
///
public IEnumerable GetRecentlyAddedItems(User user)
{
return GetRecentlyAddedItems(GetRecursiveChildren(user), user);
}
///
/// Gets all recently added unplayed items (recursive) within a folder, based on configuration and parental settings
///
public IEnumerable GetRecentlyAddedUnplayedItems(User user)
{
return GetRecentlyAddedUnplayedItems(GetRecursiveChildren(user), user);
}
///
/// Gets all in-progress items (recursive) within a folder
///
public IEnumerable GetInProgressItems(User user)
{
return GetInProgressItems(GetRecursiveChildren(user), user);
}
///
/// Takes a list of items and returns the ones that are recently added
///
private static IEnumerable GetRecentlyAddedItems(IEnumerable itemSet, User user)
{
return itemSet.Where(i => !(i.IsFolder) && i.IsRecentlyAdded(user));
}
///
/// Takes a list of items and returns the ones that are recently added and unplayed
///
private static IEnumerable GetRecentlyAddedUnplayedItems(IEnumerable itemSet, User user)
{
return GetRecentlyAddedItems(itemSet, user).Where(i =>
{
var userdata = i.GetUserData(user, false);
return userdata == null || userdata.PlayCount == 0;
});
}
///
/// Takes a list of items and returns the ones that are in progress
///
private static IEnumerable GetInProgressItems(IEnumerable itemSet, User user)
{
return itemSet.Where(i =>
{
if (i.IsFolder)
{
return false;
}
var userdata = i.GetUserData(user, false);
return userdata != null && userdata.PlaybackPositionTicks > 0;
});
}
///
/// Gets the total played percentage for a set of items
///
private static decimal GetPlayedPercentage(IEnumerable itemSet, User user)
{
itemSet = itemSet.Where(i => !(i.IsFolder));
if (!itemSet.Any())
{
return 0;
}
decimal totalPercent = 0;
foreach (BaseItem item in itemSet)
{
UserItemData data = item.GetUserData(user, false);
if (data == null)
{
continue;
}
if (data.PlayCount > 0)
{
totalPercent += 100;
}
else if (data.PlaybackPositionTicks > 0 && item.RunTimeTicks.HasValue)
{
decimal itemPercent = data.PlaybackPositionTicks;
itemPercent /= item.RunTimeTicks.Value;
totalPercent += itemPercent;
}
}
return totalPercent / itemSet.Count();
}
///
/// Marks the item as either played or unplayed
///
public override void SetPlayedStatus(User user, bool wasPlayed)
{
base.SetPlayedStatus(user, wasPlayed);
// Now sweep through recursively and update status
foreach (BaseItem item in GetChildren(user))
{
item.SetPlayedStatus(user, wasPlayed);
}
}
///
/// Finds an item by ID, recursively
///
public override BaseItem FindItemById(Guid id)
{
var result = base.FindItemById(id);
if (result != null)
{
return result;
}
foreach (BaseItem item in ActualChildren)
{
result = item.FindItemById(id);
if (result != null)
{
return result;
}
}
return null;
}
///
/// Finds an item by path, recursively
///
public BaseItem FindByPath(string path)
{
if (Path.Equals(path, StringComparison.OrdinalIgnoreCase))
{
return this;
}
foreach (BaseItem item in ActualChildren)
{
var folder = item as Folder;
if (folder != null)
{
var foundItem = folder.FindByPath(path);
if (foundItem != null)
{
return foundItem;
}
}
else if (item.Path.Equals(path, StringComparison.OrdinalIgnoreCase))
{
return item;
}
}
return null;
}
}
}