PlanTempusApp/Database/Core/ConnectionFactory/Class1.cs

using Npgsql;
using PlanTempus.Database.ModuleRegistry;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PlanTempus.Database.Core.ConnectionFactory
{
    public class PostgresConnectionFactory : IDbConnectionFactory, IAsyncDisposable
    {
        private readonly NpgsqlDataSource _baseDataSource;
        private readonly Action<NpgsqlDataSourceBuilder> _configureDataSource;
        private readonly Microsoft.Extensions.Logging.ILoggerFactory _loggerFactory;

        public PostgresConnectionFactory(
            string connectionString,
            Microsoft.Extensions.Logging.ILoggerFactory loggerFactory = null,
            Action<NpgsqlDataSourceBuilder> configureDataSource = null)
        {
            _loggerFactory = loggerFactory;
            _configureDataSource = configureDataSource ?? (builder => { });

            // Opret base data source med konfiguration
            var dataSourceBuilder = new NpgsqlDataSourceBuilder(connectionString);
            ConfigureDataSourceBuilder(dataSourceBuilder);
            _baseDataSource = dataSourceBuilder.Build();
        }

        public IDbConnection Create()
        {
            return _baseDataSource.CreateConnection();
        }

        public IDbConnection Create(string username, string password)
        {
            var connectionStringBuilder = new NpgsqlConnectionStringBuilder(
                _baseDataSource.ConnectionString)
            {
                Username = username,
                Password = password
            };

            var tempDataSourceBuilder = new NpgsqlDataSourceBuilder(
                connectionStringBuilder.ToString());

            ConfigureDataSourceBuilder(tempDataSourceBuilder);

            var tempDataSource = tempDataSourceBuilder.Build();
            return tempDataSource.CreateConnection();
        }

        private void ConfigureDataSourceBuilder(NpgsqlDataSourceBuilder builder)
        {
            if (_loggerFactory != null)
            {
                builder.UseLoggerFactory(_loggerFactory);
            }

            _configureDataSource?.Invoke(builder);
        }

        public async ValueTask DisposeAsync()
        {
            await _baseDataSource.DisposeAsync();
        }
    }
}