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using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using Timeline.Entities;
namespace Timeline.Services.Migration
{
public interface ICustomMigrationManager
{
Task Migrate();
}
public class CustomMigrationManager : ICustomMigrationManager
{
private IEnumerable<ICustomMigration> _migrations;
private DatabaseContext _database;
private ILogger<CustomMigrationManager> _logger;
public CustomMigrationManager(IEnumerable<ICustomMigration> migrations, DatabaseContext database, ILogger<CustomMigrationManager> logger)
{
_migrations = migrations;
_database = database;
_logger = logger;
}
public async Task Migrate()
{
foreach (var migration in _migrations)
{
var name = migration.GetName();
var did = await _database.Migrations.AnyAsync(m => m.Name == name);
_logger.LogInformation("Found custom migration '{0}'. Did: {1}.", name, did);
if (!did)
{
_logger.LogWarning("Begin custom migration '{0}'.", name);
await using var transaction = await _database.Database.BeginTransactionAsync();
await migration.Execute(_database);
_database.Migrations.Add(new MigrationEntity { Name = name });
await _database.SaveChangesAsync();
await transaction.CommitAsync();
_logger.LogWarning("End custom migration '{0}'.", name);
}
}
}
}
}
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