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using System;
using System.Globalization;
using System.IO;
using MediaBrowser.Controller;
using Microsoft.Extensions.Logging;
using SQLitePCL.pretty;
namespace Jellyfin.Server.Migrations.Routines
{
/// <summary>
/// Remove duplicate entries which were caused by a bug where a file was considered to be an "Extra" to itself.
/// </summary>
internal class RemoveDuplicateExtras : IMigrationRoutine
{
private const string DbFilename = "library.db";
private readonly ILogger<RemoveDuplicateExtras> _logger;
private readonly IServerApplicationPaths _paths;
public RemoveDuplicateExtras(ILogger<RemoveDuplicateExtras> logger, IServerApplicationPaths paths)
{
_logger = logger;
_paths = paths;
}
/// <inheritdoc/>
public Guid Id => Guid.Parse("{ACBE17B7-8435-4A83-8B64-6FCF162CB9BD}");
/// <inheritdoc/>
public string Name => "RemoveDuplicateExtras";
/// <inheritdoc/>
public bool PerformOnNewInstall => false;
/// <inheritdoc/>
public void Perform()
{
var dataPath = _paths.DataPath;
var dbPath = Path.Combine(dataPath, DbFilename);
using (var connection = SQLite3.Open(
dbPath,
ConnectionFlags.ReadWrite,
null))
{
// Query the database for the ids of duplicate extras
var queryResult = connection.Query("SELECT t1.Path FROM TypedBaseItems AS t1, TypedBaseItems AS t2 WHERE t1.Path=t2.Path AND t1.Type!=t2.Type AND t1.Type='MediaBrowser.Controller.Entities.Video'");
var bads = string.Join(", ", queryResult.SelectScalarString());
// Do nothing if no duplicate extras were detected
if (bads.Length == 0)
{
_logger.LogInformation("No duplicate extras detected, skipping migration.");
return;
}
// Back up the database before deleting any entries
for (int i = 1; ; i++)
{
var bakPath = string.Format(CultureInfo.InvariantCulture, "{0}.bak{1}", dbPath, i);
if (!File.Exists(bakPath))
{
try
{
File.Copy(dbPath, bakPath);
_logger.LogInformation("Library database backed up to {BackupPath}", bakPath);
break;
}
catch (Exception ex)
{
_logger.LogError(ex, "Cannot make a backup of {Library} at path {BackupPath}", DbFilename, bakPath);
throw;
}
}
}
// Delete all duplicate extras
_logger.LogInformation("Removing found duplicated extras for the following items: {DuplicateExtras}", bads);
connection.Execute("DELETE FROM TypedBaseItems WHERE rowid IN (SELECT t1.rowid FROM TypedBaseItems AS t1, TypedBaseItems AS t2 WHERE t1.Path=t2.Path AND t1.Type!=t2.Type AND t1.Type='MediaBrowser.Controller.Entities.Video')");
}
}
}
}
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