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using System;
using System.Globalization;
using System.Threading;
using System.Threading.Tasks;
using Jellyfin.Server.ServerSetupApp;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.Logging;
namespace Jellyfin.Server.Migrations.Stages;
internal class CodeMigration(Type migrationType, JellyfinMigrationAttribute metadata, JellyfinMigrationBackupAttribute? migrationBackupAttribute)
{
public Type MigrationType { get; } = migrationType;
public JellyfinMigrationAttribute Metadata { get; } = metadata;
public JellyfinMigrationBackupAttribute? BackupRequirements { get; set; } = migrationBackupAttribute;
public string BuildCodeMigrationId()
{
return Metadata.Order.ToString("yyyyMMddHHmmsss", CultureInfo.InvariantCulture) + "_" + Metadata.Name!;
}
private IServiceCollection MigrationServices(IServiceProvider serviceProvider, IStartupLogger logger)
{
var childServiceCollection = new ServiceCollection()
.AddSingleton(serviceProvider)
.AddSingleton(logger)
.AddSingleton(typeof(IStartupLogger<>), typeof(NestedStartupLogger<>))
.AddSingleton<StartupLogTopic>(logger.Topic!);
foreach (ServiceDescriptor service in serviceProvider.GetRequiredService<IServiceCollection>())
{
if (service.Lifetime == ServiceLifetime.Singleton && !service.ServiceType.IsGenericTypeDefinition)
{
object? serviceInstance = serviceProvider.GetService(service.ServiceType);
if (serviceInstance != null)
{
childServiceCollection.AddSingleton(service.ServiceType, serviceInstance);
continue;
}
}
childServiceCollection.Add(service);
}
return childServiceCollection;
}
public async Task Perform(IServiceProvider? serviceProvider, IStartupLogger logger, CancellationToken cancellationToken)
{
#pragma warning disable CS0618 // Type or member is obsolete
if (typeof(IMigrationRoutine).IsAssignableFrom(MigrationType))
{
if (serviceProvider is null)
{
((IMigrationRoutine)Activator.CreateInstance(MigrationType)!).Perform();
}
else
{
using var migrationServices = MigrationServices(serviceProvider, logger).BuildServiceProvider();
((IMigrationRoutine)ActivatorUtilities.CreateInstance(migrationServices, MigrationType)).Perform();
#pragma warning restore CS0618 // Type or member is obsolete
}
}
else if (typeof(IAsyncMigrationRoutine).IsAssignableFrom(MigrationType))
{
if (serviceProvider is null)
{
await ((IAsyncMigrationRoutine)Activator.CreateInstance(MigrationType)!).PerformAsync(cancellationToken).ConfigureAwait(false);
}
else
{
using var migrationServices = MigrationServices(serviceProvider, logger).BuildServiceProvider();
await ((IAsyncMigrationRoutine)ActivatorUtilities.CreateInstance(migrationServices, MigrationType)).PerformAsync(cancellationToken).ConfigureAwait(false);
}
}
else
{
throw new InvalidOperationException($"The type {MigrationType} does not implement either IMigrationRoutine or IAsyncMigrationRoutine and is not a valid migration type");
}
}
private class NestedStartupLogger<TCategory> : StartupLogger<TCategory>
{
public NestedStartupLogger(ILogger logger, StartupLogTopic topic) : base(logger, topic)
{
}
}
}
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