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using MediaBrowser.Common.IO;
using MediaBrowser.Common.Kernel;
using MediaBrowser.Common.ScheduledTasks;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Model.Logging;
using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Controller.IO
{
/// <summary>
/// This class will manage our file system watching and modifications. Any process that needs to
/// modify the directories that the system is watching for changes should use the methods of
/// this class to do so. This way we can have the watchers correctly respond to only external changes.
/// </summary>
public class FileSystemManager : BaseManager<Kernel>
{
/// <summary>
/// Gets or sets the directory watchers.
/// </summary>
/// <value>The directory watchers.</value>
private DirectoryWatchers DirectoryWatchers { get; set; }
/// <summary>
/// The _logger
/// </summary>
private readonly ILogger _logger;
/// <summary>
/// Initializes a new instance of the <see cref="FileSystemManager" /> class.
/// </summary>
/// <param name="kernel">The kernel.</param>
/// <param name="logger">The logger.</param>
/// <param name="taskManager">The task manager.</param>
public FileSystemManager(Kernel kernel, ILogger logger, ITaskManager taskManager)
: base(kernel)
{
_logger = logger;
DirectoryWatchers = new DirectoryWatchers(logger, taskManager);
}
/// <summary>
/// Start the directory watchers on our library folders
/// </summary>
public void StartWatchers()
{
DirectoryWatchers.Start();
}
/// <summary>
/// Saves to library filesystem.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="path">The path.</param>
/// <param name="dataToSave">The data to save.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public async Task SaveToLibraryFilesystem(BaseItem item, string path, Stream dataToSave, CancellationToken cancellationToken)
{
if (item == null)
{
throw new ArgumentNullException();
}
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException();
}
if (dataToSave == null)
{
throw new ArgumentNullException();
}
if (cancellationToken == null)
{
throw new ArgumentNullException();
}
cancellationToken.ThrowIfCancellationRequested();
//Tell the watchers to ignore
DirectoryWatchers.TemporarilyIgnore(path);
//Make the mod
dataToSave.Position = 0;
try
{
using (var fs = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
{
await dataToSave.CopyToAsync(fs, StreamDefaults.DefaultCopyToBufferSize, cancellationToken).ConfigureAwait(false);
dataToSave.Dispose();
// If this is ever used for something other than metadata we can add a file type param
item.ResolveArgs.AddMetadataFile(path);
}
}
finally
{
//Remove the ignore
DirectoryWatchers.RemoveTempIgnore(path);
}
}
/// <summary>
/// Releases unmanaged and - optionally - managed resources.
/// </summary>
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected override void Dispose(bool dispose)
{
if (dispose)
{
DirectoryWatchers.Dispose();
}
base.Dispose(dispose);
}
}
}
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