mirror of
https://github.com/jellyfin/jellyfin.git
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147 lines
4.4 KiB
C#
147 lines
4.4 KiB
C#
using MediaBrowser.Controller.Entities;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Controller.IO
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{
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public class DirectoryWatchers
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{
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private readonly List<FileSystemWatcher> FileSystemWatchers = new List<FileSystemWatcher>();
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private Timer updateTimer;
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private List<string> affectedPaths = new List<string>();
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private const int TimerDelayInSeconds = 5;
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public void Start()
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{
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var pathsToWatch = new List<string>();
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var rootFolder = Kernel.Instance.RootFolder;
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pathsToWatch.Add(rootFolder.Path);
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foreach (Folder folder in rootFolder.Children.OfType<Folder>())
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{
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foreach (Folder subFolder in folder.Children.OfType<Folder>())
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{
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if (Path.IsPathRooted(subFolder.Path))
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{
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string parent = Path.GetDirectoryName(subFolder.Path);
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if (!pathsToWatch.Contains(parent))
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{
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pathsToWatch.Add(parent);
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}
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}
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}
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}
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foreach (string path in pathsToWatch)
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{
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var watcher = new FileSystemWatcher(path, "*") { };
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watcher.IncludeSubdirectories = true;
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watcher.Changed += watcher_Changed;
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// All the others seem to trigger change events on the parent, so let's keep it simple for now.
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//watcher.Created += watcher_Changed;
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//watcher.Deleted += watcher_Changed;
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//watcher.Renamed += watcher_Changed;
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watcher.EnableRaisingEvents = true;
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FileSystemWatchers.Add(watcher);
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}
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}
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void watcher_Changed(object sender, FileSystemEventArgs e)
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{
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if (!affectedPaths.Contains(e.FullPath))
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{
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affectedPaths.Add(e.FullPath);
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}
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if (updateTimer == null)
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{
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updateTimer = new Timer(TimerStopped, null, TimeSpan.FromSeconds(TimerDelayInSeconds), TimeSpan.FromMilliseconds(-1));
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}
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else
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{
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updateTimer.Change(TimeSpan.FromSeconds(TimerDelayInSeconds), TimeSpan.FromMilliseconds(-1));
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}
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}
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private async void TimerStopped(object stateInfo)
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{
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updateTimer.Dispose();
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updateTimer = null;
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List<string> paths = affectedPaths;
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affectedPaths = new List<string>();
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await ProcessPathChanges(paths).ConfigureAwait(false);
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}
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private Task ProcessPathChanges(IEnumerable<string> paths)
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{
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var itemsToRefresh = new List<BaseItem>();
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foreach (BaseItem item in paths.Select(p => GetAffectedBaseItem(p)))
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{
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if (item != null && !itemsToRefresh.Contains(item))
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{
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itemsToRefresh.Add(item);
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}
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}
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if (itemsToRefresh.Any(i =>
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{
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var folder = i as Folder;
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return folder != null && folder.IsRoot;
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}))
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{
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return Kernel.Instance.ReloadRoot();
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}
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return Task.WhenAll(itemsToRefresh.Select(i => Kernel.Instance.ReloadItem(i)));
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}
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private BaseItem GetAffectedBaseItem(string path)
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{
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BaseItem item = null;
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while (item == null)
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{
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item = Kernel.Instance.RootFolder.FindByPath(path);
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path = Path.GetDirectoryName(path);
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}
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return item;
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}
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public void Stop()
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{
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foreach (FileSystemWatcher watcher in FileSystemWatchers)
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{
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watcher.Changed -= watcher_Changed;
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watcher.EnableRaisingEvents = false;
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watcher.Dispose();
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}
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if (updateTimer != null)
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{
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updateTimer.Dispose();
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updateTimer = null;
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}
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FileSystemWatchers.Clear();
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affectedPaths.Clear();
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}
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}
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}
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