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using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Controller.Channels;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using Microsoft.Extensions.Logging;
namespace Emby.Server.Implementations.Channels
{
public class ChannelPostScanTask
{
private readonly IChannelManager _channelManager;
private readonly IUserManager _userManager;
private readonly ILogger _logger;
private readonly ILibraryManager _libraryManager;
public ChannelPostScanTask(IChannelManager channelManager, IUserManager userManager, ILogger logger, ILibraryManager libraryManager)
{
_channelManager = channelManager;
_userManager = userManager;
_logger = logger;
_libraryManager = libraryManager;
}
public Task Run(IProgress<double> progress, CancellationToken cancellationToken)
{
CleanDatabase(cancellationToken);
progress.Report(100);
return Task.CompletedTask;
}
public static string GetUserDistinctValue(User user)
{
var channels = user.Policy.EnabledChannels
.OrderBy(i => i)
.ToList();
return string.Join("|", channels.ToArray());
}
private void CleanDatabase(CancellationToken cancellationToken)
{
var installedChannelIds = ((ChannelManager)_channelManager).GetInstalledChannelIds();
var databaseIds = _libraryManager.GetItemIds(new InternalItemsQuery
{
IncludeItemTypes = new[] { typeof(Channel).Name }
});
var invalidIds = databaseIds
.Except(installedChannelIds)
.ToList();
foreach (var id in invalidIds)
{
cancellationToken.ThrowIfCancellationRequested();
CleanChannel(id, cancellationToken);
}
}
private void CleanChannel(Guid id, CancellationToken cancellationToken)
{
_logger.LogInformation("Cleaning channel {0} from database", id);
// Delete all channel items
var allIds = _libraryManager.GetItemIds(new InternalItemsQuery
{
ChannelIds = new[] { id }
});
foreach (var deleteId in allIds)
{
cancellationToken.ThrowIfCancellationRequested();
DeleteItem(deleteId);
}
// Finally, delete the channel itself
DeleteItem(id);
}
private void DeleteItem(Guid id)
{
var item = _libraryManager.GetItemById(id);
if (item == null)
{
return;
}
_libraryManager.DeleteItem(item, new DeleteOptions
{
DeleteFileLocation = false
}, false);
}
}
}
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